CN111591281A - Idle speed control method and device, vehicle and storage medium - Google Patents
Idle speed control method and device, vehicle and storage medium Download PDFInfo
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- 238000012544 monitoring process Methods 0.000 claims abstract description 135
- 238000003745 diagnosis Methods 0.000 claims abstract description 95
- 239000004606 Fillers/Extenders Substances 0.000 claims abstract description 75
- 238000001514 detection method Methods 0.000 claims description 6
- 238000004590 computer program Methods 0.000 claims description 2
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- 238000002485 combustion reaction Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W20/00—Control systems specially adapted for hybrid vehicles
- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/06—Combustion engines, Gas turbines
- B60W2710/0666—Engine torque
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/08—Electric propulsion units
- B60W2710/081—Speed
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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- Combustion & Propulsion (AREA)
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Abstract
The invention discloses an idle speed control method, an idle speed control device, a vehicle and a storage medium. Detecting a current operating state of a vehicle according to an idle speed request of the vehicle for which a monitoring item diagnosis requirement exists; and if the current running state meets the preset idle speed entering condition, controlling a range extender of the vehicle to enter the idle speed working condition. The technical scheme of the embodiment of the invention solves the problem that the range extender cannot enter the idle working condition and further cannot carry out monitoring item diagnosis on the vehicle of the vehicle provided with the range extender, so that the vehicle provided with the range extender can detect the current running state of the vehicle only through the idle request of the vehicle, namely, the range extender can be automatically controlled to jump from the current running state to the idle working condition, the monitoring item diagnosis operation is executed, and the requirement of national emission regulations on the monitoring item is met.
Description
Technical Field
The embodiment of the invention relates to the technical field of vehicle control, in particular to an idle speed control method, an idle speed control device, a vehicle and a storage medium.
Background
According to the requirements of the light automobile pollutant emission limit and measurement method (sixth stage of china), the vehicle model with the fuel engine must be subjected to catalyst monitoring and diagnosis and crankcase ventilation (PCV) system monitoring and diagnosis.
Under the condition of not adding additional parts, an Engine Management System (EMS for short) generally performs monitoring item diagnosis on an automobile under an idle condition, such as catalyst monitoring diagnosis and PCV System monitoring diagnosis.
At present, traditional internal combustion engine car directly provides whole car power through the engine, when the car stops, when loosening accelerator pedal, EMS can direct control car engine speed and reduce and get into the idle operating mode, but to the electric automobile that has configured the range extender, can be when the car electric energy is not enough, engine and the generator through the range extender provide electric power for whole car battery jointly, and then guarantee whole car power, car speed and throttle etc. and the engine in the range extender are unbound this moment, can't reduce the rotational speed of generator and get into the idle operating mode when stopping and loosing the throttle, just also can't carry out monitoring item diagnosis to the car.
Disclosure of Invention
The embodiment of the invention provides an idle speed control method, an idle speed control device, a vehicle and a storage medium, so as to realize automatic control of a range extender of the vehicle to enter an idle speed working condition.
In a first aspect, an embodiment of the present invention provides an idle speed control method, including:
detecting a current operating state of a vehicle according to an idle speed request of the vehicle for which a monitoring item diagnosis requirement exists;
and if the current running state meets the preset idle speed entering condition, controlling a range extender of the vehicle to enter the idle speed working condition.
In a second aspect, an embodiment of the present invention further provides an idle speed control apparatus, including:
the vehicle state detection module is used for detecting the current running state of the vehicle according to the idle speed request of the vehicle with the monitoring item diagnosis requirement;
and the idle working condition entering module is used for controlling the range extender of the vehicle to enter the idle working condition if the current running state meets the preset idle entering condition.
In a third aspect, an embodiment of the present invention further provides a vehicle, including:
one or more processors;
a memory for storing one or more programs;
the range extender is used for providing electric energy for the vehicle;
when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the idle speed control method of any embodiment of the present invention.
In a fourth aspect, embodiments of the present invention provide a computer-readable storage medium having a computer program stored thereon, which when executed by a processor, implements an idle speed control method according to any of the embodiments of the present invention.
The embodiment of the invention provides an idle speed control method, an idle speed control device, a vehicle and a storage medium, when the vehicle has a monitoring item diagnosis requirement, a vehicle idle speed request is generated, then detecting the current running state of the vehicle, controlling a range extender of the vehicle to enter an idle working condition if the current running state of the vehicle meets a preset idle entering condition, thereby realizing the automatic control of the idle working condition of the range extender of the vehicle, solving the problem that the vehicle equipped with the range extender can not enter the idle working condition and further can not carry out monitoring item diagnosis on the vehicle, without performing any additional operation during the running of the vehicle, the current running state of the vehicle is detected only by an idle speed request of the vehicle, the vehicle can be automatically controlled to jump from the current running state to the idle working condition, so that the vehicle provided with the range extender can execute the diagnosis operation of the monitoring item, and the requirement of the national emission regulation on the monitoring item is met.
Drawings
FIG. 1 is a flow chart of an idle speed control method according to an embodiment of the present invention;
FIG. 2 is a flowchart of an idle speed control method according to a second embodiment of the present invention;
FIG. 3 is a flowchart of an idle speed control method according to a third embodiment of the present invention;
FIG. 4 is a block diagram illustrating a method for controlling a vehicle range extender to enter an idle condition according to a third embodiment of the present invention;
fig. 5 is a schematic structural diagram of an idle speed control device according to a fourth embodiment of the present invention;
fig. 6 is a schematic structural diagram of a vehicle according to a fifth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a flowchart of an idle speed control method according to an embodiment of the present invention, which is applicable to an electric vehicle equipped with a range extender, and is mainly applied to a scenario that a vehicle equipped with a range extender cannot enter an idle state by reducing a rotation speed of an engine when the vehicle stops and releases an accelerator, and thus a monitoring item diagnosis cannot be performed on the vehicle, but the application scenario is not limited thereto. The idle speed control method provided by the embodiment of the invention can be executed by an idle speed control device provided by the embodiment of the invention, the device can be realized by software and/or hardware, and the idle speed control device is integrated in a vehicle for executing the method, and the vehicle can be an electric automobile provided with a range extender.
Specifically, referring to fig. 1, the method may include the steps of:
and S110, detecting the current running state of the vehicle according to the idle speed request of the vehicle with the monitoring item diagnosis requirement.
According to the requirements of national emission regulations, a vehicle model with a fuel engine must be subjected to catalyst monitoring diagnosis and PCV system monitoring diagnosis, namely, a vehicle with the fuel engine must be subjected to monitoring item diagnosis. For a vehicle equipped with a range extender, such as a range-extended electric vehicle, and the like, under the condition that no additional part is added, the EMS diagnoses a monitoring item of the vehicle when the vehicle works under an idle working condition.
It should be noted that the vehicle monitoring item diagnostics in the present embodiment may include catalyst monitoring diagnostics and PCV system monitoring diagnostics on the vehicle, and the like.
Optionally, when the vehicle has a monitoring item diagnosis requirement, it is described that the vehicle needs to be controlled to enter the idle speed working condition, so as to perform the monitoring item diagnosis on the vehicle, at this time, an idle speed request of the vehicle having the monitoring item diagnosis requirement is generated by an EMS in a self-adaptive manner, so as to indicate that the vehicle needs to be controlled to enter the idle speed working condition currently, and the vehicle is allowed to jump to the idle speed working condition only when a certain operation condition is reached, so as to avoid a situation that the vehicle fails to enter the idle speed working condition due to a conflict between the operation state and the idle speed working condition.
For example, the current operating state of the vehicle in the present embodiment may include: the method comprises the steps that an EMS requests idling, an auxiliary power control unit requests a power value, an EMS demand torque value, an accelerator, the time after the last idling working condition exits, the current working condition of a vehicle, the working mode of a whole vehicle controller, relevant faults and the duration time of the current state of the vehicle.
And S120, if the current running state meets a preset idle speed entering condition, controlling a range extender of the vehicle to enter an idle speed working condition.
Wherein, preset idle speed entering condition means that required vehicle accords with each item operation parameter index of normal work under the idle speed operating mode when allowing the vehicle to get into the idle speed operating mode, can include in this embodiment:
1) EMS requests idling;
2) the requested Power of an Auxiliary Power Unit (APU) is smaller than a set value, specifically, the requested Power of the APU can be calculated by a functional module of the VCU, and the set value is 6 kw;
3) the accelerator is smaller than a set numerical value, specifically, the accelerator numerical value can be read by a sensor, and the set numerical value is 3%;
4) the required EMS torque is smaller than a set numerical value, specifically, the required EMS torque can be read by a sensor, and the set numerical value is 50 Nm;
5) the time after the last idle exit is greater than a set value, specifically, the time after the last idle exit can be obtained according to a timer, and the set value is 10 s;
6) the current vehicle is not in the working condition of deceleration and fuel cut;
7) a Vehicle Control Unit (VCU) is currently in a power generation mode;
8) no related fault exists, and particularly, no problem exists in equipment and a system related to the current monitoring item diagnosis;
9) the above conditions 1) -8) are all satisfied, and the duration is greater than a set value, specifically, 1 s.
Optionally, when the current running state of the vehicle meets all the requirements under the preset idle-speed entering condition, which indicates that the vehicle is supported to enter the idle-speed working condition, the range extender of the vehicle is automatically controlled to directly enter the idle-speed working condition, so that the vehicle is subjected to monitoring item diagnosis in the following process.
For example, in this embodiment, controlling the range extender of the vehicle to enter the idle operating condition may specifically include: and controlling the torque value of an engine in the range extender of the vehicle to be reduced to the required torque under the idle working condition, and controlling the rotating speed of a generator in the range extender to be reduced to the target rotating speed under the idle working condition, so that the range extender of the vehicle enters the idle working condition.
Specifically, the range extender comprises an engine and a generator, and corresponding requirements for the torque of the engine and the rotating speed of the generator exist under the idle speed condition.
Optionally, the embodiment controls the torque output by the engine and the rotating speed output by the generator through the VCU; when the current running state of the vehicle meets the preset idle speed entering condition, the torque demand of the engine is controlled by the VCU to be slowly transited from the current value to the required torque under the idle speed working condition, namely 0, and a motor controller (Generator Control Unit, GCU for short) controls the rotating speed of the Generator to be slowly transited from the current rotating speed to the target rotating speed. After the torque of the engine reaches 0 and the rotating speed of the generator reaches the target rotating speed, the generator mode is switched to the torque mode from the rotating speed mode, the output torque is 0, at the moment, the engine enters an idling working condition, and the following monitoring item diagnosis can be completed.
According to the technical scheme provided by the embodiment, the current running state of the vehicle is detected according to the idle speed request of the vehicle with the monitoring item diagnosis requirement, if the current running state meets the preset idle speed entering condition, the range extender of the vehicle is controlled to enter the idle speed working condition, so that the automatic control of the range extender of the vehicle to enter the idle speed working condition is realized, the problem that the vehicle provided with the range extender cannot enter the idle speed working condition and cannot perform monitoring item diagnosis on the vehicle is solved, no additional operation is required to be performed in the running process of the vehicle, the current running state of the vehicle is detected only through the idle speed request of the vehicle, the vehicle can be automatically controlled to jump from the current running state to the idle speed working condition, the vehicle provided with the range extender can perform monitoring item diagnosis operation, and the requirement of national emission regulations on the monitoring items is met.
Example two
Fig. 2 is a flowchart of an idle speed control method according to a second embodiment of the present invention, which is optimized based on the second embodiment. Specifically, as shown in fig. 2, the present embodiment explains in detail a specific process of generating an idle request of a vehicle and exiting an idle condition by a range extender.
Alternatively, as shown in fig. 2, the idle speed control method provided by the embodiment may include the following steps:
s210, if the relevant parameters of the monitoring items of the vehicle meet the preset diagnosis conditions of the monitoring items, generating an idling request of the vehicle.
Specifically, relevant parameters of a monitoring item of a vehicle can be detected by the VCU, when the relevant parameters of the monitoring item of the vehicle meet preset diagnostic conditions of the monitoring item, the EMS sends an idling request to the VCU after generating the idling request of the vehicle, and the VCU detects the current running state of the vehicle.
In this embodiment, the preset monitoring item diagnostic condition is described by taking two types of monitoring and diagnosis of a catalyst on a vehicle and monitoring and diagnosis of a PCV system included in vehicle monitoring item diagnosis as examples, where the preset monitoring item diagnostic condition refers to a range where relevant monitoring item diagnostic parameters in the vehicle meet vehicle monitoring item diagnostic requirements:
for the on-vehicle catalyst monitoring diagnosis, the preset monitoring item diagnosis condition may include:
1) the input signal, the calculation signal and the like are correct, and related systems for monitoring and diagnosing the catalytic converter are in normal operation states;
2) the signals of the front and the rear oxygen sensors are in a normal state after being heated, and can correctly reflect and transmit the signals of the sensors.
3) The number of times of the completion of the monitoring and diagnosing of the catalyst is smaller than the maximum limit value, specifically, the maximum limit value of the number of times of the completion of the monitoring and diagnosing of the catalyst is set when the vehicle leaves a factory, and if the number of times of the diagnosing is too large, the normal running of the vehicle is not facilitated.
For PCV system monitoring diagnostics on a vehicle, the preset monitoring item diagnostic conditions may include:
1) the input signals, the calculation signals and the like are correct, and relevant systems monitored and diagnosed by the PCV system are in normal operation states;
2) the external atmospheric pressure is greater than a minimum limit value, specifically, the minimum limit is 72kPa, and the PCV system diagnosis can be carried out only when the external atmospheric pressure is in a reasonable range;
3) the running time of the engine is greater than the minimum limit value, the engine is in a stable state after running for a period of time, and the minimum limit value of the running time of the engine can be a value set when the vehicle leaves a factory;
4) the air inlet temperature inside the vehicle is greater than the minimum limit value, specifically, the air inlet temperature inside the vehicle can be read according to a temperature sensor, and the minimum limit can be a value set when the vehicle leaves a factory or can be set manually;
5) the ignition voltage is in a reasonable range so that the engine can complete normal starting;
6) the engine water temperature is greater than the minimum limit value, and specifically, the engine water temperature can be read through a coolant temperature sensor;
7) the number of times of idle requesting does not exceed the maximum limit, specifically, the maximum limit of the number of times of idle requesting is set when the vehicle leaves a factory, and if the number of times of idle requesting is too large, normal running of the vehicle is not facilitated.
And S220, detecting the running state of the vehicle at the current moment according to the idle speed request of the vehicle.
When the VCU receives an idle request from the EMS, it detects the operating state of the vehicle at the current time. The operation parameters included in the current operation state of the vehicle have been described in detail in the previous embodiment, and are not described herein again.
And S230, if the current running state meets a preset idle speed entering condition, controlling a range extender of the vehicle to enter an idle speed working condition.
The step has already been described in detail in S120 in the previous embodiment, and is not described here again.
And S240, detecting the running state of the vehicle under the idling working condition in real time.
Specifically, because the running state of the vehicle can change, there may be various indexes required by the running state of the vehicle under the idle working condition that do not satisfy the preset idle entry condition, and the problem that the vehicle works abnormally under the idle working condition is caused.
For example, the running state of the vehicle under the idle condition in the embodiment may include: EMS requests idling exit, has related faults, APU requests power value, an accelerator pedal and EMS enters the timing of idling working condition.
And S250, if the running state of the vehicle under the idling state meets the preset idling exit condition, controlling the range extender of the vehicle to exit the idling working condition.
The preset idle exit condition refers to that the required vehicle meets various operation parameter indexes under the normal idle exit condition when the vehicle is allowed to exit the idle state, and the preset idle exit condition in this embodiment may include:
1) the EMS requests an idle exit,
2) there is a related fault, specifically, the fault occurs to the parts and systems related to the current monitoring item diagnosis;
3) the APU request power is greater than a set value, specifically, the APU request power can be obtained by calculating through a functional module of the VCU, and the set value is 12 kw;
4) the accelerator pedal is larger than a set value, specifically, the accelerator value can be read by a sensor, and the set value is 5%;
5) the EMS enters the idling working condition, the timing is larger than a set numerical value, specifically, the timing when the EMS enters the idling working condition can be obtained by reading the time of the idling timer, and the set numerical value is 10 s.
Optionally, when the running state of the vehicle entering the idle speed meets any one of the preset idle speed exit conditions, the range extender of the vehicle is controlled to exit the idle speed working condition.
According to the technical scheme provided by the embodiment, whether relevant parameters of a monitoring item of the vehicle meet preset monitoring item diagnosis conditions is judged firstly, if yes, an idle speed request of the vehicle is generated, then the running state of the vehicle at the current moment is detected according to the idle speed request of the vehicle, if the current running state meets the preset idle speed entering conditions, a range extender of the vehicle is controlled to enter the idle speed working condition, then the running state of the vehicle under the idle speed working condition is detected in real time, if the running state of the vehicle under the idle speed entering condition meets the preset idle speed exiting conditions, the range extender of the vehicle is controlled to exit the idle speed working condition, the problem that the vehicle provided with the range extender cannot enter the idle speed working condition and further cannot perform monitoring item diagnosis on the vehicle is solved, and no additional operation is required to be performed in the running process of the vehicle, the current running state of the vehicle is detected only through the idling request of the vehicle, and the vehicle can be automatically controlled to jump from the current running state to the idling working condition, so that the vehicle provided with the range extender executes the diagnosis operation of the monitoring item, and the requirement of the national emission regulation on the monitoring item is met.
EXAMPLE III
Fig. 3 is a flowchart of an idle speed control method according to a third embodiment of the present invention, which is optimized based on the third embodiment. Specifically, as shown in fig. 3, the present embodiment explains in detail a specific process of performing the target monitoring item diagnosis to which the monitoring item diagnosis condition points.
Alternatively, as shown in fig. 3, the idle speed control method provided by the embodiment may include the following steps:
and S310, if the relevant parameters of the monitoring items of the vehicle meet the preset diagnosis conditions of the monitoring items, generating an idle speed request of the vehicle.
And S320, detecting the running state of the vehicle at the current moment according to the idle speed request of the vehicle.
S330, if the current running state meets the preset idle speed entering condition, controlling a range extender of the vehicle to enter the idle speed working condition.
The above-mentioned S310 to S330 are already described in detail in S210 to S230 of the second embodiment, and are not described again here.
And S340, detecting relevant parameters of a monitoring item of the vehicle at the current moment after the vehicle enters the idling working condition.
Specifically, since the vehicle may change the relevant parameters of the monitoring item on the vehicle from the time of detecting that the vehicle has the monitoring item diagnosis requirement to the time of controlling the vehicle to enter the idle working condition, after the idle activation, the relevant parameters of the monitoring item of the vehicle at the current moment after entering the idle working condition need to be detected again, and at this time, the relevant parameters of the monitoring item of the vehicle at the current moment after entering the idle working condition can really reflect the situation of the monitoring item diagnosis requirement at the moment, so as to determine whether the preset monitoring item diagnosis condition is satisfied.
And S350, if the relevant parameters of the monitoring item of the vehicle at the current moment after the vehicle enters the idling working condition meet the preset monitoring item diagnosis condition, executing the target monitoring item diagnosis pointed by the monitoring item diagnosis condition.
Optionally, in this embodiment, corresponding preset monitoring item diagnosis conditions are preset for various monitoring item diagnoses that may exist in the vehicle, so when it is detected that the relevant parameters of the monitoring item at the current time after the vehicle enters the idle operating condition satisfy a certain preset monitoring item diagnosis condition, a target monitoring item, which is indicated by the preset monitoring item diagnosis condition and needs to be diagnosed by the vehicle at this time, is first confirmed, and then the target monitoring item diagnosis, which is indicated by the monitoring item diagnosis condition, is executed by the VCU, so as to obtain a corresponding diagnosis result.
For example, in the embodiment, by taking two monitoring diagnoses of a catalyst on a vehicle and a PCV system as examples included in the vehicle monitoring diagnosis, if a relevant parameter of a monitoring item at the current time after the vehicle enters the idle operating condition meets a preset monitoring item diagnosis condition of the catalyst monitoring diagnosis, the catalyst monitoring diagnosis is executed; and if the relevant parameters of the monitoring item of the vehicle at the current moment after the vehicle enters the idle working condition meet the preset monitoring item diagnosis conditions of the PCV system monitoring diagnosis, executing the PCV system monitoring item diagnosis.
The preset monitoring item diagnostic condition for the catalyst monitoring diagnosis and the preset monitoring item diagnostic condition for the PCV system monitoring diagnosis have been described in detail in embodiment two, and are not described herein again.
Optionally, if the operating state of the vehicle at the current time after the vehicle enters the idle operating condition does not meet the preset fault diagnosis condition, the steps S310 to S330 are repeated.
And S360, if the diagnosis is successfully completed, controlling the range extender of the vehicle to exit from the idle working condition.
Specifically, after the diagnosis is completed, the VCU controls the range extender of the vehicle to exit from the idle condition, and at the same time, the generator exits from the torque mode and is switched to the rotation speed mode.
In this embodiment, fig. 4 is a structural block diagram of controlling a vehicle range extender to enter an idle operating condition in a method provided by a third embodiment of the present invention.
Alternatively, as shown in fig. 4, collecting data of the coolant temperature sensor, the intake air pressure sensor, the crankshaft position sensor, the oxygen sensor and the throttle position sensor can obtain water temperature, intake air flow rate, engine speed, front and rear oxygen sensor voltage and throttle opening of the engine, wherein the front and rear oxygen sensor voltage is a fault parameter in the preset fault diagnosis condition monitored by the catalyst on the vehicle, the water temperature, intake air flow rate, engine speed and throttle opening of the engine are monitoring parameters in the preset monitoring diagnosis condition monitored by the PCV system on the vehicle, and if the relevant parameters of the monitoring items of the vehicle meet the preset monitoring diagnosis condition, the EMS is controlled to generate an idle speed request; after receiving the idle speed request sent by the EMS, the VCU responds to the idle speed request of the EMS and confirms the state of the whole vehicle, namely, the running state of the vehicle at the current moment is detected, if the current running state of the vehicle meets the preset idle speed entering condition, the VCU sends a zero torque request to the EMS and the GCU, so that the torques of the EMS and the GCU are gradually reduced to 0 to reach the required torque under the idle speed working condition, and meanwhile, the VCU controls the rotating speed of the GCU to be reduced to the target rotating speed under the idle speed working condition, so that the range extender of the vehicle enters the idle speed working condition.
Optionally, if the diagnosis is successfully completed, the EMS may generate an idle exit request, and the VCU may respond to the idle exit request of the EMS to exit the idle condition.
Optionally, the EMS may also confirm the status of the monitoring item diagnostics.
Optionally, the EMS may also detect a preset monitoring item diagnostic condition.
Optionally, power requirements may be passed between the EMS and VCU.
According to the technical scheme provided by the embodiment, by detecting the relevant parameters of the monitoring item of the vehicle at the current moment after the vehicle enters the idle working condition, if the running state of the vehicle at the current moment after the vehicle enters the idle working condition meets the preset monitoring item diagnosis condition, the target monitoring item diagnosis pointed by the monitoring item diagnosis condition is executed, if the diagnosis is successfully completed, the range extender of the vehicle is controlled to exit the idle working condition, the problems that the vehicle provided with the range extender cannot enter the idle working condition and further cannot perform monitoring item diagnosis on the vehicle are solved, the vehicle provided with the range extender executes the monitoring item diagnosis operation, and the requirements of national emission regulations on the monitoring item are met.
Example four
Fig. 5 is a schematic structural diagram of an idle speed control device according to a fourth embodiment of the present invention, where this embodiment is applicable to a case of controlling an idle speed condition, as shown in fig. 5, the idle speed control device includes: a vehicle state detection module 510 and an idle entry module 520.
The vehicle state detection module 510 is configured to detect a current operating state of a vehicle according to an idle speed request of the vehicle for which a monitoring item diagnosis requirement exists; the idle condition entering module 520 is configured to control a range extender of the vehicle to enter an idle condition if the current operation state meets a preset idle entering condition.
According to the technical scheme provided by the embodiment, the current running state of the vehicle is detected according to the idle speed request of the vehicle with the monitoring item diagnosis requirement; and if the current running state meets the preset idle speed entering condition, controlling a range extender of the vehicle to enter the idle speed working condition. The technical scheme of the embodiment of the invention solves the problem that the vehicle provided with the range extender cannot enter the idle working condition and further cannot carry out monitoring item diagnosis on the vehicle, does not need to execute any additional operation in the running process of the vehicle, and can automatically control the vehicle to jump from the current running state to the idle working condition only by detecting the current running state of the vehicle through the idle speed request of the vehicle, so that the vehicle provided with the range extender executes the monitoring item diagnosis operation and meets the requirements of national emission regulations on the monitoring item.
Further, the idle condition entering module 520 may be specifically configured to:
and controlling the torque value of an engine in the range extender of the vehicle to be reduced to the required torque under the idle working condition, and controlling the rotating speed of a generator in the range extender to be reduced to the target rotating speed under the idle working condition, so that the range extender of the vehicle enters the idle working condition.
Further, the idle speed control device may further include:
the idle working condition quitting module is used for detecting the running state of the vehicle under the idle working condition in real time; and if the running state of the vehicle under the idle working condition meets the preset idle exit condition, controlling the range extender of the vehicle to exit the idle working condition.
Further, the idle condition entering module 520 may be further specifically configured to:
detecting relevant parameters of monitoring items of the vehicle at the current moment after the vehicle enters an idling working condition;
and if the relevant parameters of the monitoring item of the vehicle at the current moment after the vehicle enters the idling working condition meet the preset monitoring item diagnosis condition, executing the target monitoring item diagnosis pointed by the monitoring item diagnosis condition.
Further, the idle condition quitting module may be further specifically configured to:
and if the diagnosis is successfully completed, controlling the range extender of the vehicle to exit from the idle working condition.
Further, the vehicle state detection module 510 may be specifically configured to:
if the relevant parameters of the monitoring items of the vehicle meet the preset monitoring item diagnosis conditions, generating an idling request of the vehicle;
and detecting the running state of the vehicle at the current moment according to the idle speed request of the vehicle.
The idle speed control device provided by the embodiment can be applied to the idle speed control method provided by any embodiment, and has corresponding functions and beneficial effects.
EXAMPLE five
Fig. 6 is a schematic structural diagram of a vehicle according to a fifth embodiment of the present invention, as shown in fig. 6, the vehicle includes a processor 610, a memory 620, and a range extender 630; the number of processors 610 in the vehicle may be one or more, and one processor 610 is taken as an example in fig. 6; the processor 610, memory 620, and range extender 630 in the vehicle may be connected by a bus or other means, such as by a bus connection in fig. 6.
The memory 620 may be implemented as a computer-readable storage medium that may be used to store software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the idle speed control methods of embodiments of the present invention (e.g., the vehicle state detection module 510 and the idle entry module 520 in the idle control device). The processor 610 executes various functional applications and data processing of the vehicle, i.e., implements the idle speed control method described above, by executing software programs, instructions, and modules stored in the memory 620.
The memory 620 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the memory 620 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the memory 620 may further include memory located remotely from the processor 610, which may be connected to the vehicle over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The range extender 630 may be used to provide electrical power to the vehicle.
The vehicle provided by the embodiment can be applied to the idle speed control method provided by any embodiment, and has corresponding functions and beneficial effects.
EXAMPLE six
An embodiment of the present invention further provides a storage medium containing computer-executable instructions which, when executed by a computer processor, perform an idle speed control method, the method comprising:
detecting a current operating state of a vehicle according to an idle speed request of the vehicle for which a monitoring item diagnosis requirement exists;
and if the current running state meets the preset idle speed entering condition, controlling a range extender of the vehicle to enter the idle speed working condition.
Of course, the embodiment of the present invention provides a storage medium containing computer-executable instructions, and the computer-executable instructions are not limited to the operations of the method described above, and can also execute the related operations in the idle speed control method provided by any embodiment of the present invention.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
It should be noted that, in the embodiment of the idle speed control device, the included units and modules are merely divided according to the functional logic, but are not limited to the above division as long as the corresponding functions can be realized; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. An idle speed control method, comprising:
detecting a current operating state of a vehicle according to an idle speed request of the vehicle for which a monitoring item diagnosis requirement exists;
and if the current running state meets the preset idle speed entering condition, controlling a range extender of the vehicle to enter the idle speed working condition.
2. The method of claim 1, wherein controlling the range extender of the vehicle to enter an idle condition comprises:
and controlling the torque value of an engine in the range extender of the vehicle to be reduced to the required torque under the idle working condition, and controlling the rotating speed of a generator in the range extender to be reduced to the target rotating speed under the idle working condition, so that the range extender of the vehicle enters the idle working condition.
3. The method of claim 1, further comprising, after controlling a range extender of the vehicle into an idle condition:
detecting the running state of the vehicle under an idling working condition in real time;
and if the running state of the vehicle under the idle working condition meets the preset idle exit condition, controlling the range extender of the vehicle to exit the idle working condition.
4. The method of claim 1, further comprising, after controlling a range extender of the vehicle into an idle condition:
detecting relevant parameters of monitoring items of the vehicle at the current moment after the vehicle enters an idling working condition;
and if the relevant parameters of the monitoring item of the vehicle at the current moment after the vehicle enters the idling working condition meet the preset monitoring item diagnosis condition, executing the target monitoring item diagnosis pointed by the monitoring item diagnosis condition.
5. The method of claim 4, further comprising, after performing the target monitoring item diagnosis to which the monitoring item diagnosis condition is directed:
and if the diagnosis is successfully completed, controlling the range extender of the vehicle to exit from the idle working condition.
6. The method of any one of claims 1-5, wherein said detecting a current operating state of the vehicle based on the vehicle's idle speed request for which the monitoring term diagnostic requirement exists comprises:
if the relevant parameters of the monitoring items of the vehicle meet the preset monitoring item diagnosis conditions, generating an idling request of the vehicle;
and detecting the running state of the vehicle at the current moment according to the idle speed request of the vehicle.
7. An idle speed control device, comprising:
the vehicle state detection module is used for detecting the current running state of the vehicle according to the idle speed request of the vehicle with the monitoring item diagnosis requirement;
and the idle working condition entering module is used for controlling the range extender of the vehicle to enter the idle working condition if the current running state meets the preset idle entering condition.
8. The apparatus of claim 7, wherein the idle condition entry module is specifically configured to:
and controlling the torque value of an engine in the range extender of the vehicle to be reduced to the required torque under the idle working condition, and controlling the rotating speed of a generator in the range extender to be reduced to the target rotating speed under the idle working condition, so that the range extender of the vehicle enters the idle working condition.
9. A vehicle, characterized by comprising:
one or more processors;
a memory for storing one or more programs;
the range extender is used for providing electric energy for the vehicle;
when executed by the one or more processors, cause the one or more processors to implement the idle speed control method of any one of claims 1-6.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the idle speed control method according to any one of claims 1-6.
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