CN114030447A

CN114030447A - Automatic parking system, method, power assembly system and vehicle

Info

Publication number: CN114030447A
Application number: CN202111198321.3A
Authority: CN
Inventors: 文浩鹏; 舒信通; 张明
Original assignee: Sany Automobile Manufacturing Co Ltd
Current assignee: Sany Automobile Manufacturing Co Ltd
Priority date: 2021-10-14
Filing date: 2021-10-14
Publication date: 2022-02-11

Abstract

The invention provides an automatic parking system, a method, a power assembly system and a vehicle, wherein the automatic parking system comprises: the device comprises an air source, a reversing module, a standby valve and a parking air chamber; the gas source is respectively connected with the reversing module and the standby valve; after the reversing module and the standby valve are connected in parallel, the reversing module and the standby valve are jointly connected to the parking hand valve; wherein the parking hand valve is used for realizing the switching between the reversing module and the standby valve. According to the automatic parking system, the automatic parking method, the power assembly system and the vehicle, the reversing valve, the standby valve and the parking hand valve capable of switching the reversing valve and the standby valve are arranged, so that the switching between electric control and manual control can be realized while the air is charged into and discharged from the parking air chamber.

Description

Automatic parking system, method, power assembly system and vehicle

Technical Field

The invention relates to the technical field of vehicle equipment, in particular to an automatic parking system, an automatic parking method, a power assembly system and a vehicle.

Background

The existing vehicles are generally configured as a manual brake valve, air charging and discharging of a parking relay valve are controlled through air switching, and a braking system is provided with an air-cut spring brake, so that parking on flat ground and on a slope can be realized. Along with the continuous development of electronic technology, automatically controlled formula parking system (EPB) has appeared in the market, can realize automatic parking function, and less driver's operation hand valve number of times promotes to drive and experiences by a wide margin. The EPB valve consists of an EPB switch and an EPB valve body which are connected through a wiring harness.

However, the electronically controlled parking system has a disadvantage in that the parking operation and the release of the parking operation are not performed when the connection of the wire harness is failed, so that the vehicle cannot move. Meanwhile, the hand brake is used for emergency braking, and when a wire harness fails or the whole vehicle controller fails, emergency braking cannot be performed under emergency conditions, so that great potential safety hazards are brought. Particularly, in a new energy vehicle, the number of electric wire harnesses and controllers is large, and the probability of problems is increased.

Disclosure of Invention

The invention provides an automatic parking system, which is used for solving the defect that an electric control type parking system in the prior art cannot operate parking and release parking when wiring harness connection fails, so that a vehicle cannot move, the existing electric control parking system cannot perform emergency braking under an emergency condition, and great potential safety hazards are brought.

The invention also provides a control method of the automatic parking system, which is used for solving the defect that the existing electric control type parking system cannot operate parking and release parking when the wiring connection fails, so that the vehicle cannot move, the existing electric control parking system cannot perform emergency braking under an emergency condition, and great potential safety hazards are brought.

The invention also provides a power assembly system.

The invention further provides a vehicle.

According to a first aspect of the present invention, there is provided an automatic parking system comprising: the device comprises an air source, a reversing module, a standby valve and a parking air chamber;

the gas source is respectively connected with the reversing module and the standby valve;

after the reversing module and the standby valve are connected in parallel, the reversing module and the standby valve are jointly connected to the parking hand valve;

wherein the parking hand valve is used for realizing the switching between the reversing module and the standby valve.

The automatic parking system provided by the invention avoids the problems that the parking cannot be carried out and the parking is released due to the failure of an electric control loop, and a standby valve and a parking hand valve are added. The automatic parking function can be realized, and the automatic parking function can be shielded physically without influencing the realization of the traditional manual parking function.

According to one embodiment of the invention, the reversing module comprises a normally closed reversing valve and a normally open reversing valve connected in series;

the normally closed directional control valve includes: an off state and an on state;

the normally open directional control valve includes: a first path and a second path;

in the first passage, the normally closed reversing valve is in a disconnected state, and the gas in the parking gas chamber is discharged through the normally open reversing valve;

in the second passage, the normally closed reversing valve is in a conducting state, and gas of the gas source sequentially passes through the normally closed reversing valve, the normally open reversing valve and the parking hand valve.

Specifically, the present embodiment provides an implementation manner of a reversing module, and the normally closed reversing valve and the normally open reversing valve are arranged to realize air supply and exhaust to the parking air chamber in an electrically controlled manner.

According to one embodiment of the invention, the normally closed reversing valve is a two-position two-way normally closed valve and/or the normally open reversing valve is a two-position three-way normally open valve.

According to an embodiment of the present invention, further comprising: a relay valve and a parking air chamber;

the relay valve is connected with the air source;

the parking hand valve, the relay valve and the parking air chamber are connected in sequence.

In a possible implementation mode, the normally closed reversing valve is a two-position two-way reversing valve, the normally closed reversing valve comprises an off state and a conducting state, when the normally closed reversing valve is in the off state, gas in the parking air chamber is discharged, when the normally closed reversing valve is in the conducting state, gas is supplied to the parking air chamber, and through mutual matching of the normally closed reversing valve and the normally open reversing valve during state switching, gas in the parking air chamber is discharged and gas is supplied to the parking air chamber.

In a possible implementation mode, the normally closed reversing valve is a two-position two-way electromagnetic reversing valve, the normally closed reversing valve comprises an off state and a conducting state, when the normally closed reversing valve is in the off state, gas in the parking air chamber is discharged, when the normally closed reversing valve is in the conducting state, gas is supplied to the parking air chamber, and through mutual matching of the normally closed reversing valve and the normally open reversing valve during state switching, gas in the parking air chamber is discharged, and gas is supplied to the parking air chamber.

In a possible implementation mode, the normally-open reversing valve is a two-position three-way reversing valve, the normally-open reversing valve comprises a first passage for discharging gas in the parking gas chamber and a second passage for supplying gas into the parking gas chamber, and the first passage and the second passage are switched by the two-position three-way electromagnetic reversing valve.

In a possible implementation mode, the normally-open reversing valve is a two-position three-way electromagnetic reversing valve, the normally-open reversing valve comprises a first passage for exhausting gas in the parking air chamber and a second passage for supplying gas into the parking air chamber, and the first passage and the second passage are switched by the two-position three-way electromagnetic reversing valve.

It should be noted that, in the above-mentioned embodiments and/or implementation manners, in order to save space, the specific arrangement structures, the port functions, the air path switching manners, and the like of the normally-closed reversing valve and the normally-open reversing valve are not specifically described in the present invention, and in practical applications, the specific structures of the normally-closed reversing valve and the normally-open reversing valve may be correspondingly designed according to actual needs or refer to the arrangement manners in related fields.

According to an embodiment of the present invention, further comprising: a first air pressure sensor and a second air pressure sensor;

the first air pressure sensor is arranged between the parking hand valve and the relay valve;

the second air pressure sensor is arranged between the relay valve and the parking air chamber.

Particularly, the embodiment provides an implementation mode that sets up first baroceptor and second baroceptor in relay valve both sides, through setting up first baroceptor and second baroceptor, has realized the acquireing to relay valve both sides pressure value, and then judges the tolerance in the parking air chamber, and the time that parking was accomplished and parking was relieved and is accomplished is mastered to the accuracy.

In a possible embodiment, the determination of the air discharge and the air charge is performed on the pressure values fed back by the first air pressure sensor and the second air pressure sensor, and the corresponding criteria fed back by the first air pressure sensor and the second air pressure sensor may be set to the same pressure value.

In a possible embodiment, the determination of the air discharge and the air charge is performed on the pressure values fed back by the first air pressure sensor and the second air pressure sensor, and the respective criteria fed back by the first air pressure sensor and the second air pressure sensor may be set to different pressure values.

According to a second aspect of the present invention, there is provided a control method of an automatic parking system, comprising:

responding to a power-on signal of the vehicle;

acquiring the speed parameter of the vehicle, the state parameter of the door and the pressure parameter of the seat, and judging;

and determining at least one of the time meeting the condition that the speed parameter is zero is greater than a first preset time, the vehicle door is in an open state and the pressure parameter is less than a preset pressure, and executing a parking decision.

The control method of the automatic parking system provided by the invention has the advantages that the automatic parking function is realized through the electromagnetic valve, the standby valve is added, the effectiveness of the traditional pneumatic control parking loop can be ensured, and the influence on normal driving is avoided. And on the basis, the intelligent automatic parking is realized according to the conditions of parking, seat-off parking, door-opening parking and the like.

In a possible embodiment, the first preset time is set to 3 seconds or more.

According to an embodiment of the present invention, the step of determining that at least one of the time when the speed parameter is zero is greater than a first preset time, the vehicle door is in an open state, and the pressure parameter is less than a preset pressure is performed, specifically includes:

responding to a parking execution signal;

and sending a disconnection maintaining signal to the normally closed reversing valve and sending an exhaust signal to the normally open reversing valve.

According to one embodiment of the present invention, after the step of sending the off hold signal to the normally closed directional control valve and the step of sending the exhaust signal to the normally open directional control valve, the method specifically includes:

acquiring pressure parameters of two sides of a relay valve;

and if the pressure parameters at the two sides of the relay valve are determined to be smaller than a first preset pressure, sending a lighting signal to a meter P lamp and sending a closing signal to the normally-open reversing valve.

Specifically, the embodiment provides an implementation manner for executing a parking decision, and the implementation manner is to perform corresponding operations on the normally closed reversing valve and the normally open reversing valve according to a parking execution signal, monitor pressure parameters on two sides of the relay valve, and realize judgment on a parking completion condition.

According to an embodiment of the present invention, after the step of determining that at least one of the time when the speed parameter is zero is greater than a first preset time, the vehicle door is in an open state, and the pressure parameter is less than a preset pressure, the method further includes:

acquiring gear information of the vehicle;

if the gear of the vehicle is determined to be an N gear, executing the parking decision;

and if the gear of the vehicle is determined to be a non-N gear, executing a parking release decision.

Specifically, the present embodiment provides an embodiment in which parking release is performed according to shift position information, and whether parking release is performed is determined according to the shift position information of the vehicle.

In a possible implementation mode, the gear of the vehicle is a non-N gear, which indicates that the vehicle is ready for starting and needs to be released from parking at the moment, so that the use of the vehicle is prevented from being influenced.

According to an embodiment of the present invention, the step of executing a parking release decision when the shift position of the vehicle is determined to be a non-N shift position specifically includes:

responding to the fact that the vehicle is in a non-N gear, and acquiring the opening information of an accelerator pedal of the vehicle;

and if the instant accelerator pedal opening degree of the vehicle is determined to be larger than the preset accelerator pedal opening degree, executing the parking release decision.

Specifically, the present embodiment provides an implementation in which parking release is performed according to the opening degree of an accelerator pedal, and the determination of the parking release condition is performed according to the opening degree of the accelerator pedal.

In a possible embodiment, the preset accelerator pedal opening is between three and three percent.

In a possible embodiment, the preset accelerator pedal opening is five percent.

responding to a parking release signal;

and sending an inflation signal to the normally closed reversing valve and sending a ventilation maintaining signal to the normally open reversing valve.

According to an embodiment of the present invention, after the step of sending the inflation signal to the normally closed direction-changing valve and sending the ventilation maintaining signal to the normally open direction-changing valve, the method specifically includes:

acquiring pressure parameters of two sides of a relay valve;

and if the pressure parameters at the two sides of the relay valve are determined to be larger than a second preset pressure, sending an extinguishing signal to an instrument P lamp and sending a disconnection signal to the normally closed reversing valve.

Specifically, the embodiment provides an implementation manner for executing a parking release decision, and the implementation manner is to perform corresponding operations on the normally closed reversing valve and the normally open reversing valve according to a received parking release signal, monitor pressure parameters on two sides of the relay valve, and realize judgment of a parking release completion condition.

In a possible embodiment, the second preset pressure corresponding to the pressure parameter on both sides of the relay valve is the same.

In a possible embodiment, the second preset pressure corresponding to the pressure parameter on both sides of the relay valve is different.

According to one embodiment of the invention, the method comprises the following steps: timing within a continuous time node in response to a power down signal of the vehicle;

and executing the parking decision after the timing at least reaches a second preset time.

Specifically, the embodiment provides an implementation manner for executing parking according to a vehicle off-electrical signal, and through acquiring the vehicle off-electrical signal, automatic parking of the vehicle is realized, and the problem that the vehicle is forgotten to park after getting off is avoided.

According to a third aspect of the present invention, there is provided a powertrain system having the above-described automatic parking system, or a control method using the above-described automatic parking system.

According to a fourth aspect of the present invention, there is provided a vehicle having the above-mentioned automatic parking system, or a control method using the above-mentioned automatic parking system, or the above-mentioned powertrain system.

One or more technical solutions in the present invention have at least one of the following technical effects: according to the automatic parking system, the automatic parking method, the power assembly system and the vehicle, the parallel reversing valve and the standby valve are arranged, and the parking hand valve capable of switching the reversing valve and the standby valve is arranged, so that the switching between electric control and manual control can be realized while the air is charged into and discharged from the parking air chamber.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or 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 it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic view showing the layout of an automatic parking system according to the present invention;

FIG. 2 is a second schematic view of the arrangement of the automatic parking system according to the present invention;

FIG. 3 is a schematic flow chart of a control method for an automatic parking system according to the present invention;

FIG. 4 is a second flowchart of the control method of the automatic parking system according to the present invention;

FIG. 5 is a third schematic flow chart of the control method of the automatic parking system provided by the present invention;

FIG. 6 is a fourth flowchart illustrating a control method of the automatic parking system according to the present invention;

FIG. 7 is a fifth flowchart illustrating a control method of the automatic parking system according to the present invention;

fig. 8 is a sixth schematic flow chart of the control method of the automatic parking system according to the present invention.

Reference numerals:

10. a gas source; 20. A normally closed directional control valve; 30. A normally open diverter valve;

40. a backup valve; 50. A parking hand valve; 60. A relay valve;

70. a parking air chamber; 80. A first air pressure sensor; 90. A second air pressure sensor.

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 obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Fig. 1 and 2 are one and two schematic layout views of an automatic parking system according to the present invention. Mainly illustrating the arrangement relationship in the automatic parking system provided by the present invention, the structure of each component is illustrated in detail in fig. 1, wherein the related structures of the normally closed directional control valve 20, the normally open directional control valve 30, the standby valve 40, the parking hand valve 50, the relay valve 60 and the parking air chamber 70 are not described in particular detail in the present invention, and reference may be made to related designs in the art.

In a possible embodiment, the normally closed directional control valve 20 is a two-position two-way directional control valve, the normally closed directional control valve 20 includes an off state and an on state, when the normally closed directional control valve 20 is in the off state, the gas in the parking air chamber 70 is discharged, when the normally closed directional control valve 20 is in the on state, the gas is supplied to the parking air chamber 70, and when the normally closed directional control valve 20 and the normally open directional control valve 30 are mutually matched during state switching, the gas in the parking air chamber 70 is discharged, and the gas is supplied to the parking air chamber 70.

In a possible embodiment, the normally-open directional control valve 30 is a two-position three-way directional control valve, the normally-open directional control valve 30 includes a first path for discharging the gas in the parking gas chamber 70 and a second path for supplying the gas into the parking gas chamber 70, and the first path and the second path are switched by the two-position three-way electromagnetic directional control valve.

In fig. 2, the components are schematically shown, wherein the gas supply to the normally closed reversing valve 20, the standby valve 40 and the relay valve 60 is realized by dividing the gas source 10 into three paths, and in practical application, the three paths of gas sources 10 can be provided, or one path of gas source 10 can be provided, and the corresponding path of supply is provided through a pipeline.

Fig. 3 is a schematic flow chart of the control method of the automatic parking system provided by the present invention, and mainly shows steps S100, S200, and S300.

Step S100, responding to a power-on signal of the vehicle.

In step S100, a corresponding parking determination process is started by acquiring a power-on signal of the vehicle.

And step S200, acquiring the speed parameter of the vehicle, the state parameter of the vehicle door and the pressure parameter of the seat, and judging.

In step S200, intelligent automatic parking is achieved according to the conditions of parking, unseating, door opening, and the like.

And step S300, determining at least one of the conditions that the time when the speed parameter is zero is greater than a first preset time, the vehicle door is in an open state and the pressure parameter is less than a preset pressure, and executing a parking decision.

In a possible embodiment of step S300, the first preset time may be set to be greater than or equal to 3 seconds.

In a possible embodiment of step S300, the state parameter of the vehicle door may be set to correspond to a corresponding opening state according to a corresponding angle at which the vehicle door is opened.

In a possible embodiment of step S300, the pressure is preset

Fig. 4 is a second flowchart of the automatic parking system control method provided by the present invention, which mainly shows steps S310, S320, S330 and S340.

Step S310, responding to the parking execution signal.

In step S310, a corresponding parking determination process is started by acquiring a power-on signal of the vehicle.

In step S320, an off hold signal is sent to the normally closed directional control valve 20, and an exhaust signal is sent to the normally open directional control valve 30.

In step S320, the system gas is guided by operating the normally closed directional valve 20 and the normally open directional valve 30 accordingly.

In a possible embodiment, the normally closed directional valve 20 remains open, the normally open directional valve 30 acts to vent air, and air is vented between the normally open directional valve 30 and the line of the relay valve 60.

In step S330, pressure parameters on both sides of the relay valve 60 are acquired.

In step S330, pressure parameters of both sides of the relay valve 60 are obtained, so that the parking completion degree is correspondingly determined according to the pressure in the air path.

Step S340, determining that the pressure parameter at both sides of the relay valve 60 is smaller than the first preset pressure, sending a lighting signal to the gauge P lamp, and sending a closing signal to the normally-open directional valve 30.

In a possible embodiment of step S340, the first preset pressure may be set to 0.1 MPa.

Fig. 5 is a third schematic flowchart of the control method of the automatic parking system according to the present invention, and mainly shows steps S350, S360 and S370.

In step S350, gear information of the vehicle is acquired.

In step S350, by acquiring the shift position information of the vehicle, a corresponding parking release determination process is started.

And step S360, if the gear of the vehicle is determined to be the N gear, executing a parking decision.

In step S360, the gear of the vehicle is in the N gear, which indicates that there is no related operation requirement for the vehicle, so that the speed parameter, the state parameter and the pressure parameter are continuously obtained, and a corresponding determination is made.

And step S370, if the gear of the vehicle is determined to be the non-N gear, executing a parking release decision.

In step S370, the shift position of the vehicle is not N, which indicates that the vehicle is ready to start and needs to be released from parking, so as to avoid affecting the use of the vehicle.

Fig. 6 is a fourth flowchart of the automatic parking system control method provided by the present invention, which mainly shows steps S371 and S372.

In step S371, in response to the non-N range of the vehicle, the accelerator pedal opening information of the vehicle is acquired.

In step S371, the parking release condition is determined according to the opening degree of the accelerator pedal.

And step S372, if the opening degree of the instant accelerator pedal of the vehicle is determined to be larger than the preset opening degree of the accelerator pedal, executing a parking release decision.

In a possible embodiment of step 372, the accelerator pedal opening is preset to be between three percent and one percent.

Fig. 7 is a fifth flowchart of the control method of the automatic parking system according to the present invention, and mainly shows steps S373, S374, S375, and S376.

Step S373, responding to the parking release signal.

In step S373, by acquiring the parking release signal, the corresponding parking release determination process is started.

In step S374, the charge signal is sent to the normally closed directional control valve 20, and the ventilation maintaining signal is sent to the normally open directional control valve 30.

In step S374, the system gas is directed by operating the normally closed directional valve 20 and the normally open directional valve 30 accordingly.

In step S375, pressure parameters on both sides of the relay valve 60 are acquired.

In step S375, pressure parameters of both sides of the relay valve 60 are acquired, so that the parking release completion degree is correspondingly determined according to the pressure in the air path.

In step S376, if it is determined that the pressure parameter on both sides of the relay valve 60 is greater than the second preset pressure, an off signal is sent to the instrument P lamp, and an off signal is sent to the normally closed directional valve 20.

In step S376, after the normally-closed and normally-

open selector valves

20 and 30 are operated accordingly according to the received parking release signal, the parking release is completed when the pressure parameter on both sides of the relay valve 60 is greater than the second preset pressure.

In a possible embodiment, the second preset pressure corresponding to the pressure parameter is the same across the relay valve 60.

In a possible embodiment, the second preset pressure corresponding to the pressure parameter is different across the relay valve 60.

Fig. 8 is a sixth schematic flowchart of the control method of the automatic parking system according to the present invention, and mainly shows steps S400 and S500.

In step S400, in response to a vehicle power-off signal, a time is counted in the continuous time node.

In step S400, a corresponding parking determination process is started by obtaining the power-off signal of the vehicle, so that automatic parking is ensured after the vehicle stops powering off, and a safety problem caused by manual operation or forgetting to park is avoided.

And step S500, after timing at least reaches second preset time, executing parking decision.

In a possible embodiment of step S500, the second preset time is set to be equal to or greater than 3 seconds.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In some embodiments of the present invention, as shown in fig. 1 and 2, the present solution provides an automatic parking system including: air supply 10, diverter module, back-up valve 40 and parking hand valve 50.

The gas source 10 is connected to the diverter module and the back-up valve 40, respectively.

After the reversing module and the standby valve 40 are connected in parallel, the parking hand valve 50 is connected together.

The parking hand valve 50 is used to effect switching between the diverter module and the backup valve 40.

It should be noted that, the automatic parking system provided by the present invention avoids the problem that the parking cannot be performed and the parking can be released due to the failure of the electric control circuit, and adds the backup valve 40 and the parking hand valve 50. The automatic parking function can be realized, and the automatic parking function can be shielded physically without influencing the realization of the traditional manual parking function.

In some possible embodiments of the invention, the reversing module includes a normally closed reversing valve 20 and a normally open reversing valve 30 in series.

The normally closed direction valve 20 includes: an off state and an on state.

The normally open selector valve 30 includes: a first passageway and a second passageway.

In the first passage, the normally closed directional control valve 20 is in the open state, and the gas of the parking gas chamber 70 is discharged through the normally open directional control valve 30.

In the second path, the normally closed direction valve 20 is in a conducting state, and the gas of the gas source 10 passes through the normally closed direction valve 20, the normally open direction valve 30 and the parking hand valve 50 in sequence.

In some possible embodiments of the invention, the normally closed directional valve 20 is a two-position two-way normally closed valve, and/or the normally open directional valve 30 is a two-position three-way normally open valve.

In some possible embodiments of the present invention, the method further includes: a relay valve 60 and a parking air chamber 70.

The relay valve 60 is connected to the air supply 10.

The parking hand valve 50, the relay valve 60, and the parking air chamber 70 are connected in sequence.

Specifically, the present embodiment provides an embodiment of a reversing module, which realizes air supply and air exhaust to the parking air chamber 70 in an electrically controlled manner by providing the normally closed reversing valve 20 and the normally open reversing valve 30.

In a possible embodiment, the normally closed directional control valve 20 is a two-position two-way electromagnetic directional control valve, the normally closed directional control valve 20 includes an off state and an on state, when the normally closed directional control valve 20 is in the off state, the gas in the parking air chamber 70 is discharged, when the normally closed directional control valve 20 is in the on state, the gas is supplied to the parking air chamber 70, and when the state is switched between the normally closed directional control valve 20 and the normally open directional control valve 30, the gas in the parking air chamber 70 is discharged and the gas is supplied to the parking air chamber 70 are realized through mutual cooperation.

In a possible embodiment, the normally-open directional control valve 30 is a two-position three-way electromagnetic directional control valve, the normally-open directional control valve 30 includes a first path for discharging the gas in the parking gas chamber 70 and a second path for supplying the gas into the parking gas chamber 70, and the first path and the second path are switched by the two-position three-way electromagnetic directional control valve.

It should be noted that, in the above-mentioned embodiments and/or implementation manners, for the sake of saving space, the specific arrangement structures, the port functions, the air path switching manners, and the like of the normally closed reversing valve 20 and the normally open reversing valve 30 are not specifically described in the present invention, and in practical applications, the specific structures of the normally closed reversing valve 20 and the normally open reversing valve 30 may be correspondingly designed according to actual needs or refer to the arrangement manners in related fields.

In some possible embodiments of the present invention, the method further includes: a first air pressure sensor 80 and a second air pressure sensor 90.

The first air pressure sensor 80 is provided between the parking hand valve 50 and the relay valve 60.

The second air pressure sensor 90 is disposed between the relay valve 60 and the parking air chamber 70.

Specifically, the present embodiment provides an implementation manner in which the first air pressure sensor 80 and the second air pressure sensor 90 are disposed on both sides of the relay valve 60, and by disposing the first air pressure sensor 80 and the second air pressure sensor 90, pressure values on both sides of the relay valve 60 are obtained, so that the air quantity in the parking air chamber 70 is determined, and the time for completing parking and releasing parking is accurately grasped.

In a possible embodiment, the determination of the air discharge and the air charge is performed on the pressure values fed back by the first air pressure sensor 80 and the second air pressure sensor 90, and the corresponding criteria fed back by the first air pressure sensor 80 and the second air pressure sensor 90 may be set to the same pressure value.

In a possible embodiment, the determination of the air discharge and the air charge is performed on the pressure values fed back by the first air pressure sensor 80 and the second air pressure sensor 90, and the respective criteria fed back by the first air pressure sensor 80 and the second air pressure sensor 90 may be set to different pressure values.

In some embodiments of the present invention, as shown in fig. 1 to 8, the present solution provides a control method of an automatic parking system, including:

responding to a power-on signal of the vehicle;

acquiring a speed parameter of a vehicle, a state parameter of a vehicle door and a pressure parameter of a seat, and judging;

and determining at least one of the time when the speed parameter is zero is greater than a first preset time, the vehicle door is in an open state and the pressure parameter is less than a preset pressure, and executing a parking decision.

In detail, the invention also provides a control method of the automatic parking system, which is used for solving the defect that the existing electric control type parking system cannot operate parking and release parking when the wiring harness connection fails, so that the vehicle cannot move, the existing electric control parking system cannot perform emergency braking under an emergency condition, and great potential safety hazards are brought, and the potential safety hazards brought by leaving the driver or leaving the vehicle without pulling the hand brake can be realized by acquiring the vehicle speed, the vehicle door and the relevant parameters of the seat.

It should be noted that, in the control method of the automatic parking system provided by the invention, the automatic parking function is realized through the electromagnetic valve, and meanwhile, the backup valve 40 is added, so that the effectiveness of the traditional pneumatic control parking loop can be ensured, and the influence on normal driving can be avoided. And on the basis, the intelligent automatic parking is realized according to the conditions of parking, seat-off parking, door-opening parking and the like.

In a possible embodiment, the first preset time is set to 3 seconds or more.

In some possible embodiments of the present invention, if it is determined that at least one of the time when the speed parameter is zero is greater than the first preset time, the vehicle door is in an open state, and the pressure parameter is less than the preset pressure is met, the step of executing the parking decision specifically includes:

responding to a parking execution signal;

an open hold signal is sent to the normally closed diverter valve 20 and a vent signal is sent to the normally open diverter valve 30.

In some possible embodiments of the present invention, the step of sending the off hold signal to the normally closed direction valve 20 and the step of sending the exhaust signal to the normally open direction valve 30 are followed by:

acquiring pressure parameters at two sides of the relay valve 60;

and if the pressure parameter at the two sides of the relay valve 60 is determined to be smaller than the first preset pressure, sending an ignition signal to the instrument P lamp and sending a closing signal to the normally-open reversing valve 30.

Specifically, the present embodiment provides an implementation manner of executing a parking decision, which performs corresponding operations on the normally-closed reversing valve 20 and the normally-open reversing valve 30 according to a parking execution signal, and monitors pressure parameters on two sides of the relay valve 60 to determine a parking completion condition.

In some possible embodiments of the present invention, if it is determined that at least one of the time when the speed parameter is zero is greater than the first preset time, the vehicle door is in an open state, and the pressure parameter is less than the preset pressure is satisfied, after the step of executing the parking decision, the method specifically further includes:

acquiring gear information of a vehicle;

if the gear of the vehicle is determined to be the N gear, executing a parking decision;

and if the gear of the vehicle is determined to be not the N gear, executing a parking releasing decision.

In some possible embodiments of the present invention, if it is determined that the shift position of the vehicle is not the N-shift position, the step of executing the parking release decision specifically includes:

and if the instant accelerator pedal opening degree of the vehicle is determined to be larger than the preset accelerator pedal opening degree, executing a parking release decision.

In a possible embodiment, the preset accelerator pedal opening is five percent.

responding to a parking release signal;

a charge signal is sent to the normally closed directional control valve 20 and a vent hold signal is sent to the normally open directional control valve 30.

In some possible embodiments of the present invention, after the step of sending the inflation signal to the normally-closed direction-changing valve 20 and the ventilation maintaining signal to the normally-open direction-changing valve 30, the method specifically includes:

acquiring pressure parameters at two sides of the relay valve 60;

and if the pressure parameters at the two sides of the relay valve 60 are determined to be larger than the second preset pressure, sending an extinguishing signal to the instrument P lamp and sending an opening signal to the normally closed reversing valve 20.

Specifically, the present embodiment provides an implementation manner of executing a parking release decision, which performs corresponding operations on the normally-closed reversing valve 20 and the normally-open reversing valve 30 according to a received parking release signal, and monitors pressure parameters on two sides of the relay valve 60 to determine a parking release completion condition.

In some possible embodiments of the invention, the method comprises: timing within the continuous time node in response to a vehicle power-down signal;

and executing the parking decision after the timing at least reaches the second preset time.

In some embodiments of the present invention, the present invention provides a powertrain system having an automatic parking system as described above, or a control method using an automatic parking system as described above.

In some embodiments of the present invention, the present invention provides a vehicle characterized by having an automatic parking system as described above, or a control method using an automatic parking system as described above, or a powertrain system as described above.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "a manner," "a particular manner," or "some manner" or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or manner is included in at least one embodiment or manner of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or mode. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or modes. Furthermore, various embodiments or modes described in this specification, as well as features of various embodiments or modes, may be combined and combined by those skilled in the art without contradiction.

Finally, it should be noted that: the above embodiments are merely illustrative of the present invention and are not to be construed as limiting the invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and the technical solution of the present invention is covered by the claims of the present invention.

Claims

1. An automatic parking system, comprising: the device comprises an air source, a reversing module, a standby valve and a parking hand valve;

2. The automatic parking system of claim 1 wherein said reversing module comprises a normally closed reversing valve and a normally open reversing valve in series;

3. An automatic parking system according to claim 2 wherein the normally closed reversing valve is a two position two normally closed valve and/or the normally open reversing valve is a two position three normally open valve.

4. The automatic parking system of claim 1, further comprising: a relay valve and a parking air chamber;

the relay valve is connected with the air source;

5. The automatic parking system according to any one of claims 1 to 4, further comprising: a first air pressure sensor and a second air pressure sensor;

6. A control method of the automatic parking system according to any one of claims 1 to 5, characterized by comprising:

responding to a power-on signal of the vehicle;

7. The method as claimed in claim 6, wherein the step of determining that at least one of the time when the speed parameter is zero is greater than a first preset time, the door is in an open state, and the pressure parameter is less than a preset pressure is performed to execute a parking decision includes:

responding to a parking execution signal;

8. The method for controlling an automatic parking system according to claim 7, wherein the step of sending an off hold signal to the normally closed directional control valve and sending an exhaust signal to the normally open directional control valve is followed by:

acquiring pressure parameters of two sides of a relay valve;

9. The method according to claim 6, wherein the step of determining that at least one of the time when the speed parameter is zero is greater than a first preset time, the door is in an open state, and the pressure parameter is less than a preset pressure is performed after the step of performing a parking decision further comprises:

acquiring gear information of the vehicle;

10. The method according to claim 9, wherein the step of executing a parking release decision if the vehicle is determined to have a non-N gear comprises:

11. The method according to claim 9, wherein the step of executing a parking release decision if the vehicle is determined to have a non-N gear comprises:

responding to a parking release signal;

12. The method for controlling an automatic parking system according to claim 11, wherein the step of sending the inflation signal to the normally closed reversing valve and sending the ventilation maintaining signal to the normally open reversing valve is followed by:

acquiring pressure parameters of two sides of a relay valve;

13. The control method of an automatic parking system according to any one of claims 6 to 12, characterized by comprising:

timing within a continuous time node in response to a power down signal of the vehicle;

14. A powertrain system characterized by having an automatic parking system of any one of the above claims 1 to 5 or a control method employing an automatic parking system of any one of the above claims 6 to 13.

15. A vehicle characterized by having an automatic parking system according to any one of claims 1 to 5, or a control method using an automatic parking system according to any one of claims 6 to 13, or a powertrain system according to claim 14.