CN109372646B - Fuel pump control circuit and method - Google Patents
Fuel pump control circuit and method Download PDFInfo
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- CN109372646B CN109372646B CN201811038264.0A CN201811038264A CN109372646B CN 109372646 B CN109372646 B CN 109372646B CN 201811038264 A CN201811038264 A CN 201811038264A CN 109372646 B CN109372646 B CN 109372646B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/3082—Control of electrical fuel pumps
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Fuel-Injection Apparatus (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
The embodiment of the invention provides a fuel pump control circuit and a method, wherein the fuel pump control circuit comprises the following steps: the system comprises a locomotive microcomputer control circuit, a fuel pressure sensor, a switch control circuit and a diesel engine electronic injection control circuit; wherein, the locomotive microcomputer control circuit is respectively connected with the fuel pressure sensor and the switch control circuit; the switch control circuit is also connected with the first fuel pump and the second fuel pump; the locomotive microcomputer control circuit is used for controlling the conduction of the first switch control circuit or the conduction of the second switch control circuit according to the fuel pressure data obtained by the fuel pressure sensor; the diesel engine electronic injection control circuit is used for maintaining the conduction of the first switch control circuit or the conduction of the second switch control circuit after the diesel engine is started. The problem that the diesel locomotive stops and the safe operation of the diesel locomotive is seriously influenced due to the fact that the fuel pump cannot normally work when a microcomputer control circuit of the locomotive breaks down is solved.
Description
Technical Field
The invention relates to a fuel pump technology, in particular to a fuel pump control circuit and a fuel pump control method.
Background
The fuel pump is used for supplying fuel for the diesel engine of the diesel locomotive, and a set of oil pump system consists of the fuel pump, a driving motor, a contactor and a switch.
In the prior art, two sets of fuel pump systems are arranged on the diesel locomotive for fuel delivery, one set of fuel pump system is used, and the other set of fuel pump system is standby, so that the problem that the diesel locomotive is stopped when the fuel pump system breaks down to cause accidents to occur to the diesel locomotive is solved. The switching of the two sets of fuel pump systems is carried out in a manual control mode. When the working fuel pump system fails, the switch of the system must be manually disconnected, however, the failure of the working fuel pump system is difficult to find in time, and the manual switching has delay.
In the prior art, the problem of delay in manual switching is solved by adopting a locomotive microcomputer control mode, the locomotive microcomputer automatically completes switching of fuel pumps when detecting that the fuel pumps break down, but the switching of the fuel pumps cannot be completed when the locomotive microcomputer fails or a locomotive microcomputer system restarts, and if the fuel pumps break down, a diesel locomotive stops, so that the safety operation of the diesel locomotive is seriously influenced.
Disclosure of Invention
The embodiment of the invention provides a fuel pump control circuit and a fuel pump control method, which solve the problems that faults of a fuel pump system in work are difficult to find in time, manual switching is delayed, so that a diesel locomotive stops, and the safe operation of the diesel locomotive is seriously influenced.
In a first aspect, an embodiment of the present invention provides a fuel pump control circuit, including:
the system comprises a locomotive microcomputer control circuit, a fuel pressure sensor, a switch control circuit and a diesel engine electronic injection control circuit;
the locomotive microcomputer control circuit is respectively connected with the fuel pressure sensor and the switch control circuit;
the switch control circuit is also connected with the first fuel pump and the second fuel pump;
the switch control circuit comprises a first switch control circuit and a second switch control circuit;
the locomotive microcomputer control circuit is used for controlling the conduction of the first switch control circuit or the conduction of the second switch control circuit according to the fuel pressure data obtained by the fuel pressure sensor;
the diesel engine electronic injection control circuit is used for maintaining the conduction of the first switch control circuit or the conduction of the second switch control circuit after the diesel engine is started.
In one possible design, further comprising: the first unidirectional conduction circuit and the second unidirectional conduction circuit;
the first one-way conduction circuit and the second one-way conduction circuit are connected with the diesel engine electronic injection control circuit;
the first one-way conduction circuit is further connected with the first switch control circuit, and the second one-way conduction circuit is further connected with the second switch control circuit.
In one possible design, the first switch control circuit includes a first contactor coil, a second contactor auxiliary contact, and a first contactor main contact;
the second switch control circuit comprises a second contactor coil, a first contactor auxiliary contact and a second contactor main contact;
when the first contactor coil is electrified, the first contactor auxiliary contact is disconnected, the second contactor auxiliary contact is closed, the first contactor main contact is closed, and the first switch control circuit is conducted;
when the second contactor coil is electrified, the auxiliary contact of the second contactor is disconnected, the auxiliary contact of the first contactor is closed, the main contact of the second contactor is closed, and the second switch control circuit is switched on.
In one possible design, the locomotive microcomputer control circuit comprises a first controller, a first channel and a second channel;
the first controller is respectively connected with the fuel pressure sensor, the first channel and the second channel;
the first channel is connected with the first switch control circuit, and the second channel is connected with the second switch control circuit;
the first controller is used for controlling the conduction of the first channel or the second channel according to the fuel pressure data obtained by the fuel pressure sensor;
when the first channel is conducted, the first switch control circuit is conducted, and when the second channel is conducted, the second switch control circuit is conducted.
In one possible design, the diesel engine electronic fuel injection control circuit comprises a second controller and a third channel;
and the second controller is used for controlling the conduction of the third channel and maintaining the conduction of the first switch control circuit or the second switch control circuit after the normal operation of the diesel engine is obtained.
In one possible design, the first unidirectional conducting circuit is a first diode, and the second unidirectional conducting circuit is a second diode;
the anode of the first secondary tube is connected with the first switch control circuit, and the cathode of the first secondary tube is connected with the third channel;
and the anode of the second diode is connected with the second switch control circuit, and the cathode of the second diode is connected with the third channel.
In one possible design, the locomotive microcomputer control circuit is specifically configured to control the first switch control circuit to be turned off and send a turn-off signal to the diesel engine electronic injection control circuit when determining that the first fuel pump has a fault according to the fuel pressure data obtained by the fuel pressure sensor, and control the second switch control circuit to be turned on after receiving the turn-off signal sent by the diesel engine electronic injection control circuit;
the diesel engine electronic injection control circuit is also used for controlling the third channel to be disconnected according to the disconnection signal, controlling the third channel to be conducted after the second switch control circuit is conducted to the diesel engine and starting the diesel engine, and maintaining the conduction of the second switch control circuit.
In a second aspect, an embodiment of the present invention provides a fuel pump control method, including:
a locomotive micro-control circuit receives fuel pressure data obtained by a fuel pressure sensor;
if the locomotive micro-control circuit determines that the first fuel pump is normal according to the fuel pressure data, a diesel engine starting completion instruction is sent to a diesel engine electronic injection control circuit;
and after the diesel engine electronic injection control circuit obtains a diesel engine starting completion instruction, controlling the conduction of a third channel in the diesel engine electronic injection control circuit.
In one possible design, the method further includes:
a locomotive micro-control circuit receives fuel pressure data obtained by a fuel pressure sensor;
if the locomotive micro-control circuit determines that the first fuel pump has a fault according to the fuel pressure data, a disconnection instruction is sent to an electronic injection control circuit of the diesel engine;
and after the diesel engine electronic injection control circuit obtains the disconnection instruction, controlling a third channel in the diesel engine electronic injection control circuit to be disconnected.
In one possible design, after the third channel inside the diesel engine electronic injection control circuit is disconnected, the method further comprises the following steps:
the locomotive microcomputer control circuit controls the first fuel pump to stop working and the second fuel pump to start working;
and the diesel engine electronic injection control circuit controls the conduction of the third channel.
The fuel pump control circuit and the method provided by the embodiment comprise a locomotive microcomputer control circuit, a fuel pressure sensor, a switch control circuit and a diesel engine electronic injection control circuit; wherein, the locomotive microcomputer control circuit is respectively connected with the fuel pressure sensor and the switch control circuit; the switch control circuit is also connected with the first fuel pump and the second fuel pump; the switch control circuit comprises a first switch control circuit and a second switch control circuit; the locomotive microcomputer control circuit is used for controlling the conduction of the first switch control circuit or the conduction of the second switch control circuit according to the fuel pressure data obtained by the fuel pressure sensor; the diesel engine electronic injection control circuit is used for maintaining the conduction of the first switch control circuit or the conduction of the second switch control circuit after the diesel engine is started. The fuel pump control circuit provided by the embodiment, wherein the locomotive microcomputer control circuit can automatically switch the first fuel pump and the second fuel pump according to the fuel pressure data obtained by the fuel pressure sensor, thereby avoiding the problems that the fault of a fuel pump system in work is difficult to find in time and the manual switching is delayed, and meanwhile, by arranging the diesel engine electronic injection control circuit, the normal use of the first fuel pump 105 and the second fuel pump 106 is ensured, the problem that the fuel pump cannot work normally due to the fault of the locomotive microcomputer control circuit after the diesel engine is started is avoided, thereby causing the stop accident of the diesel locomotive, and ensuring the safe operation of the diesel locomotive.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a first schematic diagram of a fuel pump control circuit according to an embodiment of the present invention;
FIG. 2 is a second schematic diagram of a fuel pump control circuit according to an embodiment of the present invention;
FIG. 3A is a block diagram of a fuel pump control circuit provided in an embodiment of the present invention;
FIG. 3B is a schematic diagram of a fuel pump control circuit operating during a start-up process of a diesel engine according to an embodiment of the present invention;
FIG. 3C is a schematic diagram of a control circuit of a fuel pump after the start of the diesel engine is completed according to the embodiment of the present invention;
FIG. 3D is a schematic diagram of a fuel pump control circuit operating during a switchover process provided by an embodiment of the present invention;
FIG. 4 is a first flowchart of a fuel pump control method according to an embodiment of the present invention;
fig. 5 is a second flowchart of a fuel pump control method according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic diagram of a fuel pump control circuit according to an embodiment of the present invention, as shown in fig. 1, the fuel pump control circuit according to the embodiment of the present invention includes: a locomotive microcomputer control circuit 101, a fuel pressure sensor 102, a switch control circuit 103 and a diesel engine electronic injection control circuit 104;
the locomotive microcomputer control circuit 101 is respectively connected with the fuel pressure sensor 102 and the switch control circuit 103;
the switch control circuit 103 is also connected with a first fuel pump 105 and a second fuel pump 106;
the switch control circuit includes a first switch control circuit 1031 and a second switch control circuit 1032;
the locomotive microcomputer control circuit 101 is used for controlling the conduction of the first switch control circuit 1031 or the conduction of the second switch control circuit 1032 according to the fuel pressure data obtained by the fuel pressure sensor 102;
the diesel engine electronic fuel injection control circuit 104 is configured to maintain the first switch control circuit 1031 or the second switch control circuit 1032 conductive after the diesel engine is started.
Specifically, the fuel pressure sensor 102 is configured to detect a fuel pressure inside the fuel pump in real time, and send a detected pressure value to the locomotive microcomputer control circuit 101, and the locomotive microcomputer control circuit 101 determines whether the fuel pump is in a normal operating state at the time.
Alternatively, the fuel pressure sensor 102 may be mounted on a fuel line of the locomotive for delivering fuel during operation of the locomotive, and the fuel pressure sensor 102 may be mounted on the fuel line for detecting pressure within the fuel pump.
Further, the switch control circuit 103 is used for controlling the operating states of the first fuel pump 105 and the second fuel pump 106, and the switch control circuit 103 includes a first switch control circuit 1031 and a second switch control circuit 1032.
The first switch control circuit 1031 is connected to the first fuel pump 105 and is used for controlling whether the first fuel pump 105 is in an operating state or a stop state. When the first switch control circuit 1031 is turned on, the first fuel pump 105 is powered on and is in a working state, and when the first switch control circuit 1031 is turned off, the first fuel pump 105 is powered off and is in a stop state. The first switch control circuit 103 may be, for example, a diode, and may also be, for example, a switching circuit or device such as a triode or a MOS transistor, and the first switch control circuit 1031 is not particularly limited in this embodiment.
The second switch control circuit 1032 is connected to the second fuel pump 106, and is configured to control whether the second fuel pump 106 is in an operating state or a stopped state. When the second switch control circuit 1032 is turned on, the second fuel pump 106 is powered on and is in an operating state, and when the second switch control circuit 1032 is turned off, the second fuel pump 106 is powered off and is in a stopped state. Optionally, the second switch control circuit 1032 may be, for example, a diode, and may also be, for example, a switching circuit or a device such as a triode or a MOS transistor, and the second switch control circuit 1032 is not particularly limited in this embodiment.
The diesel engine electronic fuel injection control circuit 104 is used for monitoring the state of the diesel engine, the specific content of the monitoring can be, for example, the lubricating oil pressure of the diesel engine, and can also be, for example, the rotating speed of the diesel engine, and the like, and the diesel engine electronic fuel injection control circuit 104 can simultaneously control the rotating speed and the output power of the diesel engine. In the embodiment of the invention, the diesel engine electronic fuel injection control circuit 104 is also used for opening an internal passage to assist in maintaining the normal operation of the first fuel pump 105 or the second fuel pump 106 when the locomotive microcomputer control circuit 101 has a fault.
In the embodiment of the invention, the first fuel pump 105 and the second fuel pump 106 are also arranged, and only one fuel pump is needed to complete the work in the operation process of the locomotive, so that one of the two arranged fuel pumps is used as a standby fuel pump, the other one is used as a main fuel pump, and the standby fuel pump is started when the main fuel pump fails, so that the locomotive is prevented from being shut down due to sudden failure of the main fuel pump.
In a specific implementation process, when the first fuel pump 105 is a primary fuel pump and the second fuel pump 106 is a standby fuel pump, the locomotive microcomputer control circuit 101 first controls the first switch control circuit 1031 to be turned on, and the second switch control circuit 1032 is turned off, so that the first fuel pump 105 is powered on and is in a working state. The fuel pressure sensor 102 senses fuel pressure data of the first fuel pump 105 and transmits the sensed fuel pressure data to the locomotive microcomputer control circuit 101.
The locomotive microcomputer control circuit 101 compares the received fuel pressure data with a preset threshold value to judge whether the fuel pressure of the first fuel pump 105 is abnormal or not, if the fuel pressure of the first fuel pump 105 is determined to be abnormal, the first switch control circuit 1031 is controlled to be disconnected, at the moment, the first fuel pump 105 is powered off, the working state is converted into a stop state, then the locomotive microcomputer control circuit 101 controls the second switch control circuit 1032 to be conducted, the second fuel pump 106 is powered on, the stop state is converted into the working state, the second fuel pump 106 is switched to work when the first fuel pump 105 is in fault, the diesel locomotive is ensured not to be in abnormal working due to the fault of the main fuel pump, and the safe operation of the locomotive is ensured.
Further, in the working process of the first fuel pump, the locomotive microcomputer control circuit 101 firstly controls the first switch control circuit 1031 to be conducted, then the first fuel pump 105 is powered on, the diesel engine starts to start up when the first fuel pump is in a working state, the diesel engine electronic injection controller 104 opens a passage inside the diesel engine electronic injection controller after the diesel engine finishes starting and normally runs, and the first switch control circuit 103 and the passage inside the diesel engine electronic injection controller 104 form a passage.
When the locomotive microcomputer control circuit 101 works normally, the first fuel pump 105 can be electrified to work normally through the conducted first switch control circuit 103, and if the locomotive microcomputer control circuit 101 breaks down, the first fuel pump 105 can also be electrified through a passage formed by the diesel engine electronic injection control circuit 104, so that the normal work is maintained.
Accordingly, after the first fuel pump 105 fails and switches to the second fuel pump 106 to operate, the implementation principle and process of the second fuel pump 106 in the operating state are similar to those described above, and are not described herein again.
The fuel pump control circuit provided by the implementation of the invention comprises a locomotive microcomputer control circuit 101, a fuel pressure sensor 102, a switch control circuit 103 and a diesel engine electronic injection control circuit 104; the locomotive microcomputer control circuit 101 is respectively connected with the fuel pressure sensor 102 and the switch control circuit 103; the switch control circuit 103 is also connected with a first fuel pump 105 and a second fuel pump 106; the switch control circuit includes a first switch control circuit 1031 and a second switch control circuit 1032; the locomotive microcomputer control circuit 101 is used for controlling the conduction of the first switch control circuit 1031 or the conduction of the second switch control circuit 1032 according to the fuel pressure data obtained by the fuel pressure sensor 102; the diesel engine electronic fuel injection control circuit 104 is configured to maintain the first switch control circuit 1031 or the second switch control circuit 1032 conductive after the diesel engine is started. The locomotive microcomputer control circuit 101 is arranged, the first fuel pump 105 and the second fuel pump 106 can be automatically switched according to fuel pressure data obtained by the fuel pressure sensor 102, the problems that faults of a fuel pump system in work are difficult to find in time and delay exists in manual switching are solved, the diesel engine electronic injection control circuit 104 is arranged, after the diesel engine is started and works normally, the first switch control circuit 103 or the second switch control circuit 104 is kept to be conducted, normal use of the first fuel pump 105 and the second fuel pump 106 is ensured, the problem that the fuel pumps cannot work normally due to faults of the locomotive microcomputer control circuit 101 after the diesel engine is started is solved, the diesel locomotive stops accidents are avoided, and safe operation of the diesel locomotive is guaranteed.
Fig. 2 is a second schematic diagram of a fuel pump control circuit according to an embodiment of the present invention, where the embodiment of the present invention further includes, on the basis of the embodiment of fig. 1: a first unidirectional conductive circuit 107 and a second unidirectional conductive circuit 108;
the first one-way conduction circuit 107 and the second one-way conduction circuit 108 are connected with the diesel engine electronic injection control circuit 104;
the first unidirectional conducting circuit 107 is also connected to the first switch control circuit 1031, and the second unidirectional conducting circuit 108 is also connected to the second switch control circuit 1032.
The first unidirectional circuit 107 and the second unidirectional circuit 108 may be, for example, diodes, and may also be, for example, transistors, which are not particularly limited in this embodiment, and as long as the circuits capable of achieving the unidirectional function all belong to the protection scope of the embodiment of the present invention.
In the specific implementation process, the locomotive microcomputer control circuit 101 controls the conduction of the first switch control circuit 103, after the first fuel pump 105 is powered on, the diesel engine starts to start, after the diesel engine finishes starting and normally works, the diesel engine electronic injection control circuit 104 opens a passage in the diesel engine electronic injection control circuit 104, the first switch control circuit 1031, the first one-way conduction circuit 107 and the passage in the diesel engine electronic injection control circuit 104 form a passage, if the locomotive microcomputer control circuit 101 breaks down, the first fuel pump 105 can be powered on through the passage formed by the diesel engine electronic injection control circuit 104 to continuously maintain normal work, and the conduction of the auxiliary passage can be simply and effectively realized by the aid of the one-way conduction characteristic of the first one-way conduction circuit 107.
Accordingly, after the first fuel pump 105 fails and switches to the second fuel pump 106 to operate, the implementation principle and process of the second fuel pump 106 in the operating state are similar to those described above, and are not described herein again.
The fuel pump control circuit provided by the embodiment of the invention further comprises the following components on the basis of the embodiment: a first unidirectional conductive circuit 107 and a second unidirectional conductive circuit 108; the first one-way conduction circuit 107 and the second one-way conduction circuit 108 are connected with the diesel engine electronic injection control circuit 104; the first unidirectional conducting circuit 107 is also connected to the first switch control circuit 1031, and the second unidirectional conducting circuit 108 is also connected to the second switch control circuit 1032. The characteristic of unidirectional conduction of the unidirectional conduction circuit is utilized, the conduction of the auxiliary access can be simply and effectively realized, and the chaos of the work of the locomotive can be avoided.
The technical solution of the embodiment of the fuel pump control circuit shown in fig. 2 is described in detail below by using a specific embodiment.
Fig. 3A is a structural diagram of a fuel pump control circuit according to an embodiment of the present invention, and fig. 3A further supplements the fuel pump control circuit provided in this embodiment on the basis of the embodiments of fig. 1 and fig. 2. As shown in fig. 3A, a fuel pump control circuit according to an embodiment of the present invention includes: the system comprises a locomotive microcomputer control circuit 101, a fuel pressure sensor 102, a first switch control circuit 1031, a second switch control circuit 1032, a first fuel pump 105, a second fuel pump 106, a diesel engine electronic injection control circuit 104, a first unidirectional conduction circuit 107 and a second unidirectional conduction circuit 108.
The locomotive microcomputer control circuit 101 is respectively connected with the fuel pressure sensor 102 and the switch control circuit 103; the switch control circuit 103 is also connected with a first fuel pump 105 and a second fuel pump 106; the switch control circuit 103 includes a first switch control circuit 1031 and a second switch control circuit 1032; specifically, the first switching control circuit 1031 is connected to the first fuel pump 105, and the second switching control circuit 1032 is connected to the second fuel pump 106; the first one-way conduction circuit 107 and the second one-way conduction circuit 108 are connected with the diesel engine electronic injection control circuit 104; the first unidirectional conducting circuit 107 is also connected to the first switch control circuit 1031, and the second unidirectional conducting circuit 108 is also connected to the second switch control circuit 1032.
Optionally, the first switch control circuit 1031 includes a first contactor coil 10311, a second contactor auxiliary contact 10312, and a first contactor main contact 10313;
the second switch control circuit 1032 includes a second contactor coil 10321, a first contactor auxiliary contact 10322, and a second contactor main contact 10323;
optionally, the locomotive microcomputer control circuit 101 includes a first controller 1011, a first channel 1012 and a second channel 1013;
the first controller 1011 is connected to the fuel pressure sensor 102, the first channel 1012, and the second channel 1013, respectively;
the first channel 1012 is connected to the first contactor coil 10311 in the first switch control circuit 1031, and the second channel 1013 is connected to the second contactor coil 10321 in the second switch control circuit 1032;
the contactor comprises a coil and a contact, when current flows through the coil of the contactor, a magnetic field is generated, and the magnetic field generated by the coil of the contactor is utilized to control the contact of the contactor to be opened and closed, so that the purpose of controlling the load is achieved.
The contactor contact includes main contact and auxiliary contact, and wherein the electric current carrying capacity of main contact is big, is used for realizing control functions such as control motor start most often, and the electric current carrying capacity of auxiliary contact is less relatively, can be used for auto-lock, spread signal, realization linkage etc.. Specifically, the main contact and the auxiliary contact are further divided into a normally open contact and a normally closed contact, the normally open contact is a contactor contact in an open state when the contactor coil is not energized, and the normally closed contact is a contactor contact in a closed state when the contactor coil is not energized. In the present embodiment, the first contactor main contact 10313 and the second contactor main contact 10323 are provided as normally open contacts, and the first contactor auxiliary contact 10322 and the second contactor auxiliary contact 10312 are normally closed contacts.
As shown in fig. 3A, in the embodiment of the present invention, a first switching control circuit 1031 and a second switching control circuit 1032 are provided to control the operations of the first fuel pump and the second fuel pump.
Specifically, when the first controller 1011 does not control the conduction of the first channel 1012 and the second channel 1013, neither the first contactor coil 10311 nor the second contactor coil 10321 is energized, and at this time, the first contactor auxiliary contact 10322 and the second contactor auxiliary contact 10312 are in a closed state, and the first contactor main contact 10313 and the second contactor main contact 10323 are in an open state, so that neither the first fuel pump 105 nor the second fuel pump 106 starts to operate.
When the first fuel pump 105 needs to work, the first controller 1011 controls the first passage 1012 to be conducted, at this time, the first contactor coil 10311 is electrified, and the second contactor coil 10321 is not electrified, because the first contactor main contact 10313 and the second contactor main contact 10323 are normally open contacts, at this time, the first contactor main contact 10313 is converted into a closed state from an open state, the first fuel pump 105 is electrified to start normal work, and the second contactor main contact 10323 keeps the open state, and the second fuel pump 106 is not electrified.
Meanwhile, as can be seen from fig. 3A, the first contactor auxiliary contact 10322 is connected in series in the circuit of the second contactor coil 10321, and the second contactor auxiliary contact 10312 is connected in series in the circuit of the first contactor coil 10311. Since the first contactor auxiliary contact 10322 and the second contactor auxiliary contact 10312 are both normally closed contacts, at this time, the second contactor auxiliary contact 10312 keeps the closed state, the first switch control circuit 1031 is turned on to keep the first fuel pump 105 energized, and the first contactor auxiliary contact 10322 is turned from the closed state to the open state, and the second switch control circuit 1032 is not turned on.
By arranging such a connection mode, only one fuel pump can work at one time, and the problem of short circuit of a fuel system circuit caused by simultaneous working of the first fuel pump 105 and the second fuel pump 106 when the first contactor main contact 10313 and the second contactor main contact 10323 are stuck or when a pressure sensor fails is avoided.
When the second fuel pump 106 is operated and the first fuel pump 105 is stopped, the operation principle and the operation manner are similar, and the detailed description is omitted.
Optionally, the diesel electronic fuel injection control circuit 104 includes a second controller 1041 and a third channel 1042;
the second controller 1041 is configured to control the conduction of the third channel 1042 after obtaining that the diesel engine normally operates, and maintain the conduction of the first switch control circuit 1031 or the second switch control circuit 1032.
Optionally, the first unidirectional conducting circuit 107 is a first diode, and the second unidirectional conducting circuit 108 is a second diode;
the positive electrode of the first secondary tube is connected with a first contactor coil 10311 in the first switch control circuit 1031, and the negative electrode is connected with the third channel 1042;
the anode of the second diode is connected to the second contactor coil 10321 in the second switch control circuit 1032, and the cathode is connected to the third channel 1042.
On the basis of the above embodiment, after the diesel engine is started, the second controller 1041 detects the running state of the diesel engine, after the second controller 1041 obtains the normal running of the diesel engine, the third channel 1042 is controlled to be conducted, and after the third channel 1042 is conducted, the second contactor auxiliary contact 10312, the first contactor coil 10311, the first one-way conduction circuit 107 and the third channel 1042 form a passage, so that the conduction of the first switch control circuit 103 is ensured, that is, the first fuel pump 105 can be electrified to work normally, and the problem that the first switch control circuit 103 cannot be conducted so as to cause the first fuel pump 105 to work normally when the locomotive microcomputer control circuit 101 has a problem is avoided.
The operation of the fuel pump control circuit provided by the present invention will be described in detail with reference to fig. 3B-3D. Fig. 3B is a schematic diagram of a fuel pump control circuit during a starting process of a diesel engine according to an embodiment of the present invention. As shown in fig. 3B, when the diesel engine is started, the first controller 1011 controls the first channel 1012 to be conducted, and it should be noted that before the first channel 1012 is conducted, since the first contactor auxiliary contact 10322 and the second contactor auxiliary contact 10312 are both normally closed contacts, both the first contactor auxiliary contact 10322 and the second contactor auxiliary contact 10312 are in a closed state, and similarly, since the first contactor main contact 10313 and the second contactor main contact 10323 are normally open contacts, both the first contactor main contact 10313 and the second contactor main contact 10323 are in an open state.
After the first passage 1012 is conducted, the closed second contactor auxiliary contact 10312 and the first passage 1012 form a passage, current flows through the first contactor coil 10311, and the generated magnetic field acts to convert the first contactor main contact 10313 from the open state to the closed state, as shown in the change from fig. 3A to fig. 3B, so that the first fuel pump 105 is electrified to start operation and the diesel engine is started. Meanwhile, the first contactor auxiliary contact 10322 is switched from a closed state to an open state, so that the second contactor coil 10321 is ensured not to be electrified, and only the first diesel pump 105 is ensured to work at the moment.
After the diesel engine is started, the first controller 1011 sends an instruction of completing the start of the diesel engine to the second controller 1041, and at the same time, the second controller 1041 detects the working state of the diesel engine, and after the second controller 1041 obtains that the diesel engine normally works, the third channel 1042 is controlled to be conducted, and the state is shown in fig. 3C. Fig. 3C is a schematic diagram of the operation of the fuel pump control circuit after the start of the diesel engine is completed according to the embodiment. As shown in fig. 3C, after the diesel engine is started, the third channel 1042 is closed, at this time, the second contactor auxiliary contact 10312, the first unidirectional conducting circuit 107 and the third channel 1042 form a path, at this time, when the locomotive microcomputer control circuit 101 normally operates, the first contactor coil 10311 is powered on, so that the first contactor main contact 10313 is closed, the first fuel pump 105 can be powered on to normally operate, when the locomotive microcomputer control circuit 101 has a fault and the first channel 1012 cannot be conducted, the first contactor coil 10311 can be powered on through the path formed by the second contactor auxiliary contact 10312, the first unidirectional conducting circuit 107 and the third channel 1042, so that the first contactor main contact 10313 is closed, the first fuel pump 105 can keep normally operating, the third channel 1042 is arranged to ensure that a layer of guarantee is provided for the normal operation of the fuel pump, and the problem that the fuel pump cannot operate directly due to the fault of the locomotive microcomputer control circuit 101 is avoided, the safe operation of the diesel locomotive is ensured.
When the first fuel pump 105 fails and the second fuel pump 106 needs to be switched to operate as a locomotive, the first controller 1011 is required to switch the primary fuel pump to the second fuel pump 106, which is described in detail with reference to fig. 3D.
Fig. 3D is a schematic diagram of the operation of the fuel pump control circuit in the switching process provided in this embodiment, as shown in fig. 3D, when the first fuel pump 105 has a fault, the fuel pressure sensor 102 acquires abnormal fuel pressure data of the first fuel pump 101 and sends the abnormal fuel pressure data to the first controller 1011, the first controller 1011 determines that the data sent by the fuel pressure sensor 102 is acquired, when it is determined that the first fuel pump 105 has a fault and the fuel pump needs to be switched, the first controller 1011 controls the first channel 1012 to be disconnected, the second channel 1013 to be connected, and simultaneously sends a disconnection signal to the second controller 1041, and after the second controller 1041 receives the disconnection signal, the third channel 1042 is disconnected within a preset time period.
When the first channel 1012 and the third channel 1042 are both off, the first contactor coil 10311 loses power, because the first contactor main contact 10313 is a normally open contact, the first contactor main contact becomes an off state, at this time, the first switch circuit 1031 cannot be conducted, the first fuel pump 105 loses power and stops working, and then the first controller 1011 controls the second channel 1013 to be conducted.
The first contactor auxiliary contact 10322 is a normally closed contact, so when the first contactor coil 10311 loses power, the first contactor auxiliary contact 10322 is changed into a closed state, at this time, the second channel 1013 is conducted, the first contactor auxiliary contact 10322 is in the closed state, the second contactor coil 10321 is electrified, the generated magnetic field action makes the second contactor main contact 10323 closed, the second fuel pump 106 is electrified to start normal operation, and simultaneously, the second contactor auxiliary contact 10312 is a normally closed contact, so the second contactor auxiliary contact 10312 is opened, the first switch circuit 1031 cannot be conducted, the situation that the first fuel pump 105 and the second fuel pump 106 work simultaneously is avoided, and the conversion from the first fuel pump 105 to the second fuel pump 106 is completed.
The third channel 1042 is disconnected within a preset time period after the second controller 1041 receives the disconnection signal, where the preset time period is to meet the switching of the fuel pumps, and when the preset time is reached, the second controller 1041 conducts the third channel 1042 again, so as to provide a guarantee for the operation of the second fuel pump 106, and avoid the problem that the second fuel pump 106 cannot operate normally due to the failure of the locomotive microcomputer control circuit 101.
In the fuel pump control circuit provided by this embodiment, the locomotive microcomputer control circuit 101 is specifically configured to, when it is determined that the first fuel pump 105 has a fault according to the fuel pressure data obtained by the fuel pressure sensor 102, control the first switch control circuit 1031 to turn off, send a turn-off signal to the diesel engine electronic injection control circuit 104, and control the second switch control circuit 1032 to turn on after receiving the turn-off signal sent by the diesel engine electronic injection control circuit 104; the diesel engine electronic injection control circuit 104 is further configured to control the third channel 1042 to be turned off according to the turn-off signal, and control the third channel 1042 to be turned on after the second switch control circuit 1032 is turned on and the diesel engine is started, so as to maintain the second switch control circuit 1032 to be turned on. The automatic switching between the first fuel pump 105 and the second fuel pump 106 is realized, and the problems that the fault of the fuel pump system in work is difficult to find in time and the manual switching is delayed are solved. Meanwhile, after the diesel engine is started and works normally, the diesel engine electronic injection control circuit 104 maintains the conduction of the first switch control circuit 103 or the second switch control circuit 104, so that the normal use of the first fuel pump 105 and the second fuel pump 106 is ensured, the problem that the first fuel pump or the second fuel pump cannot work normally due to the fault of a locomotive microcomputer control circuit after the diesel engine is started is avoided, and the safe operation of the diesel locomotive is ensured.
Fig. 4 is a first flowchart of a fuel pump control method provided in this embodiment, and as shown in fig. 4, the method includes:
s401, the locomotive micro-control circuit receives fuel pressure data obtained by the fuel pressure sensor.
Specifically, the fuel pressure sensor acquires fuel pressure data of the first fuel pump and sends the fuel pressure data to the locomotive micro-control circuit, and the locomotive micro-control circuit receives the fuel pressure data acquired by the fuel pressure sensor.
S402, if the locomotive micro-control circuit determines that the first fuel pump is normal according to the fuel pressure data, a diesel engine starting completion instruction is sent to the diesel engine electronic injection control circuit.
And S403, after the diesel engine electronic injection control circuit obtains the diesel engine starting completion instruction, controlling the conduction of a third channel in the diesel engine electronic injection control circuit.
When the locomotive microcomputer control circuit determines that the first fuel pump works normally according to the fuel pressure data, a diesel engine starting completion instruction is sent to the diesel engine electronic injection control circuit, the diesel engine electronic injection control circuit can also detect the working state of the diesel engine, after the diesel engine works normally, a third channel in the diesel engine electronic injection control circuit is conducted, the third channel is connected with a first switch control circuit for controlling the first fuel pump to work, when the locomotive microcomputer control circuit breaks down and cannot conduct the first switch control circuit, the third channel in the diesel engine electronic injection control circuit can replace the action of the locomotive microcomputer control circuit to maintain the conduction of the first switch control circuit, and therefore the normal work of the first fuel pump is not affected by the fault of the locomotive microcomputer control circuit.
The fuel pump control method provided by the embodiment controls the diesel engine electronic injection control circuit to assist in maintaining the normal operation of the first fuel pump, and avoids the problem that the diesel locomotive stops due to the fault of the locomotive microcomputer control circuit, so that the safety operation of the diesel locomotive is seriously influenced.
Fig. 5 is a second flowchart of a fuel pump control method according to an embodiment of the present invention, and fig. 5 further illustrates the fuel pump control method according to the embodiment of the present invention on the basis of the embodiment of fig. 4. As shown in fig. 5, the method includes:
s501, receiving fuel pressure data obtained by a fuel pressure sensor by a locomotive micro-control circuit.
S501 provided in this embodiment is similar to S401 in the embodiment of fig. 4, and this embodiment is not described herein again.
And S502, if the locomotive micro-control circuit determines that the first fuel pump has a fault according to the fuel pressure data, sending a disconnection instruction to the diesel engine electronic injection control circuit.
And S503, after the diesel engine electronic injection control circuit obtains the disconnection instruction, controlling a third channel in the diesel engine electronic injection control circuit to be disconnected.
S504, the locomotive microcomputer control circuit controls the first fuel pump to stop working, and the second fuel pump starts working.
When the locomotive microcomputer control circuit determines that the first fuel pump has a fault according to the fuel pressure data, a disconnection instruction is sent to the diesel engine electronic injection control circuit, then the diesel engine is disconnected from a third channel in the diesel engine electronic injection control circuit, meanwhile, the locomotive microcomputer control circuit is disconnected from a first switch control circuit for controlling the first fuel pump to work, and when the first switch control circuit is closed and a third channel in the diesel engine electronic injection control circuit is closed, the first fuel pump stops working.
And then the locomotive microcomputer control circuit enables a second switch circuit for controlling the second fuel pump to work to be conducted, and the second fuel pump is electrified to start working.
And S505, the diesel engine electronic injection control circuit controls the conduction of the third channel.
After the second fuel pump works, the diesel engine electronic injection control circuit is conducted with a third channel in the diesel engine electronic injection control circuit, the third channel is connected with a second switch control circuit for controlling the second fuel pump to work, when the locomotive microcomputer control circuit breaks down and cannot be conducted with the second switch control circuit, the third channel in the diesel engine electronic injection control circuit can maintain the conduction of the second switch control circuit, and therefore the normal work of the second fuel pump is not affected by the fault of the locomotive microcomputer control circuit.
The fuel pump control method provided by the embodiment can be realized by the fuel pump control circuit in the embodiment, the realization principle and the technical effect are similar, and the detailed description is omitted here.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A fuel pump control circuit, comprising: the system comprises a locomotive microcomputer control circuit, a fuel pressure sensor, a switch control circuit and a diesel engine electronic injection control circuit;
the locomotive microcomputer control circuit is respectively connected with the fuel pressure sensor and the switch control circuit;
the switch control circuit is also connected with the first fuel pump and the second fuel pump;
the switch control circuit comprises a first switch control circuit and a second switch control circuit;
the locomotive microcomputer control circuit is used for controlling the conduction of the first switch control circuit or the conduction of the second switch control circuit according to the fuel pressure data obtained by the fuel pressure sensor;
the diesel engine electronic injection control circuit is used for maintaining the conduction of the first switch control circuit or the conduction of the second switch control circuit after the diesel engine is started;
the fuel pump control circuit further comprises: the first unidirectional conduction circuit and the second unidirectional conduction circuit;
the first one-way conduction circuit and the second one-way conduction circuit are connected with the diesel engine electronic injection control circuit;
the first unidirectional conduction circuit is also connected with the first switch control circuit, and the second unidirectional conduction circuit is also connected with the second switch control circuit;
the diesel engine electronic injection control circuit comprises a first controller and a first channel;
the first controller is used for controlling the first channel to be conducted and maintaining the first switch control circuit or the second switch control circuit to be conducted after the diesel engine is obtained to normally run.
2. The circuit of claim 1, wherein the first switch control circuit comprises a first contactor coil, a second contactor auxiliary contact, and a first contactor main contact;
the second switch control circuit comprises a second contactor coil, a first contactor auxiliary contact and a second contactor main contact;
when the first contactor coil is electrified, the first contactor auxiliary contact is disconnected, the second contactor auxiliary contact is closed, the first contactor main contact is closed, and the first switch control circuit is conducted;
when the second contactor coil is electrified, the auxiliary contact of the second contactor is disconnected, the auxiliary contact of the first contactor is closed, the main contact of the second contactor is closed, and the second switch control circuit is switched on.
3. The circuit of claim 1 wherein the locomotive microcomputer control circuit includes a second controller, a second channel and a third channel;
the second controller is respectively connected with the fuel pressure sensor, the second channel and the third channel;
the second channel is connected with the first switch control circuit, and the third channel is connected with the second switch control circuit;
the second controller is used for controlling the conduction of the second channel or the third channel according to the fuel pressure data obtained by the fuel pressure sensor;
when the second channel is conducted, the first switch control circuit is conducted, and when the third channel is conducted, the second switch control circuit is conducted.
4. The circuit of claim 1, wherein the first unidirectional conducting circuit is a first diode and the second unidirectional conducting circuit is a second diode;
the anode of the first diode is connected with the first switch control circuit, and the cathode of the first diode is connected with the first channel;
and the anode of the second diode is connected with the second switch control circuit, and the cathode of the second diode is connected with the first channel.
5. The circuit of claim 1, wherein the locomotive microcomputer control circuit is specifically configured to control the first switch control circuit to be turned off and send an off signal to the diesel engine electronic injection control circuit when a failure of the first fuel pump is determined according to the fuel pressure data obtained by the fuel pressure sensor, and to control the second switch control circuit to be turned on after receiving the off signal sent by the diesel engine electronic injection control circuit;
the diesel engine electronic injection control circuit is also used for controlling the first channel to be disconnected according to the disconnection signal, controlling the first channel to be connected after the second switch control circuit is connected with the diesel engine and starts the diesel engine, and maintaining the second switch control circuit to be connected.
6. A fuel pump control method, comprising:
a locomotive micro-control circuit receives fuel pressure data obtained by a fuel pressure sensor;
if the locomotive micro-control circuit determines that the first fuel pump is normal according to the fuel pressure data, a diesel engine starting completion instruction is sent to a diesel engine electronic injection control circuit;
after the diesel engine electronic injection control circuit obtains a diesel engine starting completion instruction, controlling the conduction of a first channel in the diesel engine electronic injection control circuit;
the fuel pump control method further includes: a locomotive micro-control circuit receives fuel pressure data obtained by a fuel pressure sensor;
if the locomotive micro-control circuit determines that the first fuel pump has a fault according to the fuel pressure data, a disconnection instruction is sent to an electronic injection control circuit of the diesel engine;
after the diesel engine electronic injection control circuit obtains the disconnection instruction, a first channel in the diesel engine electronic injection control circuit is controlled to be disconnected, and the first channel is used for maintaining the conduction of a first switch control circuit or a second switch control circuit;
the diesel engine electronic injection control circuit comprises a first controller and a first channel;
the first controller is used for controlling the first channel to be conducted and maintaining the first switch control circuit or the second switch control circuit to be conducted after the diesel engine is obtained to normally run.
7. The method of claim 6, further comprising, after the first channel inside the diesel electronic injection control circuit is disconnected:
the locomotive microcomputer control circuit controls the first fuel pump to stop working and the second fuel pump to start working;
and the diesel engine electronic injection control circuit controls the conduction of the first channel.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811038264.0A CN109372646B (en) | 2018-09-06 | 2018-09-06 | Fuel pump control circuit and method |
| PCT/CN2019/097228 WO2020048252A1 (en) | 2018-09-06 | 2019-07-23 | Fuel oil pump control circuit and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811038264.0A CN109372646B (en) | 2018-09-06 | 2018-09-06 | Fuel pump control circuit and method |
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| CN109372646A CN109372646A (en) | 2019-02-22 |
| CN109372646B true CN109372646B (en) | 2021-02-09 |
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| CN201811038264.0A Active CN109372646B (en) | 2018-09-06 | 2018-09-06 | Fuel pump control circuit and method |
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| CN (1) | CN109372646B (en) |
| WO (1) | WO2020048252A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109372646B (en) * | 2018-09-06 | 2021-02-09 | 中车大连机车车辆有限公司 | Fuel pump control circuit and method |
| CN111412487B (en) * | 2020-03-19 | 2022-08-30 | 济南红烛科技有限公司 | System and method capable of performing fuel oil leakage test after boiler MFT (Fuel oil temperature) |
| CN112228228B (en) * | 2020-10-10 | 2022-11-18 | 西安爱生技术集团公司 | Unmanned aerial vehicle fuel pump work control system and control method |
| CN116163850B (en) * | 2023-02-08 | 2024-05-14 | 沪东中华造船(集团)有限公司 | Ship module integrated electric fuel pump control device and control method |
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| Publication number | Publication date |
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| WO2020048252A1 (en) | 2020-03-12 |
| CN109372646A (en) | 2019-02-22 |
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