CN112693462A - Vehicle start and stop control method and device, ACC system and readable storage medium - Google Patents
Vehicle start and stop control method and device, ACC system and readable storage medium Download PDFInfo
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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
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/14—Adaptive cruise control
- B60W30/16—Control of distance between vehicles, e.g. keeping a distance to preceding vehicle
- B60W30/17—Control of distance between vehicles, e.g. keeping a distance to preceding vehicle with provision for special action when the preceding vehicle comes to a halt, e.g. stop and go
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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
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
- B60W40/02—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to ambient conditions
- B60W40/04—Traffic conditions
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Abstract
A vehicle start-stop control method, a device, an ACC system and a readable storage medium are provided, the vehicle start-stop control method is applied to the ACC system, the ACC system is electrically connected with an engine management system, and the method comprises the following steps: when the ACC system enters a follow-up parking mode, acquiring traffic condition information of a current driving road of a vehicle, and determining waiting time required by the current parking of the vehicle according to the traffic condition information; judging whether the waiting time is higher than a threshold value; if yes, starting a start-stop permission mode, and carrying out automatic start-stop control on the engine management system in the start-stop permission mode; if not, starting the start-stop prohibition mode, and controlling the engine of the engine management system to enter an automatic start-stop prohibition state in the start-stop prohibition mode. The invention combines the follow-up stop starting function of the ACC system with the engine start-stop function configured for the whole vehicle, realizes the automatic start-stop of the engine in the ACC follow-up stop mode, saves fuel and improves the NVH of the whole vehicle.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a vehicle start and stop control method, a vehicle start and stop control device, an ACC system and a readable storage medium.
Background
With the influence of emission and fuel point policies, the automatic engine start-stop mode is almost the standard of vehicles at present. Under the long-time parking waiting working condition at the congested or traffic light intersection, the automatic start-stop can be started to save oil and improve the NVH of the whole automobile.
The existing engine start-stop mode is realized through an engine management system, the engine management system detects the self state of a vehicle, and the engine start-stop mode is started when the vehicle body state reaches a trigger condition. Such as water temperature, battery SOC, vehicle speed, brake pedal, etc.
This method often leads to start-stop activation conditions that are not intended by the driver. For example, the red light at the traffic light intersection is only left for 5 seconds, the traditional vehicle is started and stopped after the vehicle is stopped, and the like, and the vehicle is started and stopped when the green light is turned on and needs to be restarted. The engine stops and does not spout oil for only a few seconds, and the electric quantity required by restarting and the oil spraying quantity are already greater than those saved during the stop, so that the energy-saving requirement cannot be met, the vibration caused by one-time starting is suffered, and the user experience is poor.
Disclosure of Invention
In view of the above, it is necessary to provide a vehicle start/stop control method, a vehicle start/stop control apparatus, an ACC system and a readable storage medium, which are used to solve the problems of poor energy saving effect and poor user experience of the automatic start/stop function of the prior art.
A vehicle start-stop control method is applied to an ACC system, the ACC system is electrically connected with an engine management system, and the vehicle start-stop control method comprises the following steps:
when the ACC system enters a follow-up parking mode, acquiring traffic condition information of a current driving road of a vehicle, and determining waiting time required by the current parking of the vehicle according to the traffic condition information;
judging whether the waiting time is higher than a threshold value;
if yes, starting a start-stop permission mode, and carrying out automatic start-stop control on the engine management system in the start-stop permission mode;
if not, starting a start-stop prohibition mode, and controlling the engine of the engine management system to enter an automatic start-stop prohibition state in the start-stop prohibition mode.
Further, in the vehicle start-stop control method, the step of obtaining traffic condition information of a current driving road of the vehicle and determining the waiting time required for the current stop of the vehicle according to the traffic condition information includes:
acquiring an image of a current running road of a vehicle, and determining the current parking condition of the vehicle according to the image;
when the current parking condition of the vehicle is waiting for a traffic indicator light, acquiring the jumping time of the traffic indicator light;
determining the skip time as a waiting time required by the vehicle to stop currently;
when the current parking condition of the vehicle is that the vehicle passes through a congested road section, acquiring the time of passing through the congested road section;
determining a time to pass through the congested road segment as the waiting time.
Further, in the vehicle start-stop control method, the step of determining the current parking status of the vehicle according to the image includes:
determining whether a traffic indicator lamp exists on the current running road within a preset distance from the vehicle and whether a congested road section exists according to the image;
when a traffic indicator lamp exists in the preset distance, determining the state of the traffic indicator lamp;
when the traffic indicator light is in a red light or yellow light state, determining that the current parking condition of the vehicle is a waiting traffic indicator light;
when the traffic indicator light is in a green light state and a congested road section exists, determining that the current parking condition of the vehicle is that the vehicle passes through the congested road section;
and when no traffic indicator light exists in the preset distance and a congested road section exists, determining that the current parking condition of the vehicle is that the vehicle passes through the congested road section.
Further, in the vehicle start-stop control method, the step of automatically controlling the engine management system in start-stop includes:
detecting the distance between the vehicle and the front vehicle or the distance between the vehicle and the traffic sign;
and when the distance between the vehicle and the front vehicle is smaller than a first threshold value or the distance between the vehicle and the traffic sign of the front vehicle is smaller than a second threshold value, sending a closing signal to the engine management system so that the engine management system controls the engine to stop.
Further, the vehicle start-stop control method, wherein the step of prohibiting the start-stop mode and sending a control signal to the engine management system to prohibit the engine from being turned off further includes:
and when the information of the engine flameout state sent by the engine management system is acquired, exiting the follow-stop mode and entering a standby mode.
Further, the vehicle start-stop control method, wherein the step of prohibiting the start-stop mode to automatically control the start-stop of the engine management system further includes:
and when the follow-up stop mode is detected to have the duration time exceeding the threshold time, exiting the follow-up stop mode and entering the standby mode.
The invention also provides a vehicle start-stop control device, which is applied to an ACC system, wherein the ACC system is electrically connected with an engine management system, and the vehicle start-stop control device comprises:
the acquisition module is used for acquiring the traffic condition information of the current running road of the vehicle when the ACC system enters a follow-up and stop mode;
the determining module is used for determining the waiting time required by the current parking of the vehicle according to the traffic condition information;
the judging module is used for judging whether the waiting time is higher than a threshold value or not;
the first starting module is used for starting a start-stop permission mode when the waiting time is not higher than a threshold value, and automatically controlling the start and stop of the engine management system under the start-stop permission mode;
and the second starting module is used for starting a start-stop prohibition mode when the waiting time is less than or equal to the threshold value, and controlling the engine of the engine management system to enter an automatic start-stop prohibition state in the start-stop prohibition mode.
Further, in the vehicle start-stop control device, the step of obtaining traffic condition information of a current driving road of the vehicle and determining the waiting time required for the current stop of the vehicle according to the traffic condition information includes:
acquiring an image of a current running road of a vehicle, and determining the current parking condition of the vehicle according to the image;
when the current parking condition of the vehicle is waiting for a traffic indicator light, acquiring the jumping time of the traffic indicator light;
determining the skip time as a waiting time required by the vehicle to stop currently;
when the current parking condition of the vehicle is that the vehicle passes through a congested road section, acquiring the time of passing through the congested road section;
determining a time to pass through the congested road segment as the waiting time.
Further, the vehicle start/stop control device further includes:
the first quitting module is used for quitting the follow-up stop mode and entering the standby mode when the information of the engine flameout state sent by the engine management system is acquired.
Further, the vehicle start/stop control device further includes:
and the second exiting module is used for exiting the follow-up stop mode and entering the standby mode when the fact that the duration time of the follow-up stop mode exceeds the threshold time is detected.
The invention also provides a readable storage medium on which a computer program is stored, which program, when executed by a processor, implements a vehicle start-stop control method as described in any one of the above.
The invention also provides an ACC system, which comprises a memory, a processor and a computer program stored on the memory and operable on the processor, wherein the processor implements the vehicle start-stop control method when executing the computer program.
According to the invention, the follow-up stop starting function of the ACC system is combined with the engine start-stop function configured for the whole vehicle, so that the automatic start-stop of the engine is realized in the ACC follow-up stop mode, the fuel is saved, and the NVH of the whole vehicle is improved. On the premise of not increasing hardware cost, the method can be realized only by adaptively changing and optimizing ACC and EMS application layer software, and has good popularization and application values.
Drawings
FIG. 1 is a flowchart of a vehicle start-stop control method according to a first embodiment of the present invention;
FIG. 2 is a flowchart of a vehicle start-stop control method according to a second embodiment of the present invention;
fig. 3 is a block diagram of a vehicle start/stop control apparatus according to a third embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited correspondingly. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
The vehicle start-stop control method in the invention is applied to an ACC (adaptive cruise control) system. The ACC system is connected to an engine management system (EMS system). The EMS system and the ACC system are communicated in a CAN bus mode to carry out ordered data interaction.
In this embodiment, the running states included in the ACC adaptive cruise system include the following modes:
0x0 Off Off mode, 0x1 Standby Standby mode, 0x2 Active mode, 0x3 Override driver Override mode, 0x4 Standstill follow stop mode, 0x5 Failure mode.
The ACC running state is in a non-activated control mode of 0x0/0x1/0x5, and does not interfere with the vehicle speed; and the control mode of 0x2/0x3/0x4 is activated to carry out acceleration and deceleration control on the vehicle.
The ACC enters an following stop mode and its system transitions from a motion-activated control state to a following stop state. At the moment, the vehicle is static, and the engine works in an idling working condition. The operation of the engine can continue to consume fuel and produce some vibration, both of which are undesirable factors. The ACC can judge whether to start or stop the engine according to the state of the ACC and the road traffic state.
Therefore, in the present embodiment, two modes are set in the following-stop mode of the ACC system:
0x0 StopForbidden stop-start disabled mode, 0x1 StopAllowed stop-start disabled mode. When the ACC start-stop permission state is 0x0: stopfunbidden, the engine cannot enter an automatic stop, like an automatic stop suppression condition when an air conditioner (a/C) is turned on; if the engine enters the start-stop prohibition mode, the engine needs to exit the mode, and the engine runs normally.
Referring to fig. 1, a vehicle start-stop control method according to a first embodiment of the present invention includes steps S11-S14.
And step S11, when the ACC system enters the following and stopping mode, acquiring the traffic condition information of the current driving road of the vehicle, and determining the waiting time required by the current stop of the vehicle according to the traffic condition information.
In step S12, it is determined whether the waiting time is greater than the threshold, if yes, step S13 is executed, otherwise, step S14 is executed.
The forward-looking camera used by the ACC can observe the road traffic condition, comprehensively judge and output the parking waiting time. When the method is specifically implemented, the vehicle-mounted machine positioning and map navigation can be combined, and lane recognition and front congestion can be enhanced. And outputting the ACC start-stop permission state according to the estimated waiting time for stopping at this time in combination with the state of the ACC system under the non-off mode of the ACC system, wherein the waiting time threshold can be calibrated, for example, the output of the ACC start-stop permission state is allowed when the waiting time is more than 30 seconds.
And step S13, starting a start-stop permission mode, and carrying out automatic start-stop control on the engine management system in the start-stop permission mode.
And step S14, starting a start-stop prohibition mode, and controlling an engine of the engine management system to enter an automatic start-stop prohibition state in the start-stop prohibition mode.
When the ACC starts the start-stop permission mode in the follow-up stop mode, the automatic start-stop of the engine is controlled through the ACC system.
The ACC follow-up mode is generally divided into two phases. The first stage is an automatic starting stage Standstill _1 within 3 seconds of ACC follow-up and stop; the second phase is a driver operation confirmation re-starting phase Standstill _2 after the ACC is stopped for 3 seconds. Since the vehicle is automatically started after the vehicle may stop in the Standstill _1 stage, the vehicle is started immediately after the vehicle stops, and the vehicle is started again in a short time, so that the purposes of reducing vibration and saving oil are not achieved, and the automatic stop is allowed by the ACC in the Standstill _2 stage. The EMS does not distinguish between the Standstill _1 and Standstill _2 follow-up stop phases, and the ACC running state on the CAN bus CAN meet the requirement only through the Standstill follow-up stop state.
When the ACC running state is 0x2: Active and 0x3: Override, the engine is prohibited from entering automatic start-stop.
In order to avoid the situation that the front vehicle is unexpectedly stopped when the vehicle is stopped, the engine is generally prohibited from entering the automatic stop for the preset time period a under the 0x4: standard following stop mode. The default value of the variable a is 3 seconds, which corresponds to the stage of switching from Standstill _1 to Standstill _2, and a value of more than or equal to 3 seconds, such as 5 seconds or other specific values, can be calibrated according to the actual requirement. When the total Standstill duration exceeds a threshold time, such as 180 seconds, the state of the overheated ACC operation can shift to 0x1: Standby in order to protect the entire vehicle brake system from long-time dwell.
Briefly describing the process of entering and exiting the automatic stop under the ACC working condition, when the ACC normally follows the vehicle, the running state is 0x2: Active, and the engine is not allowed to enter the automatic stop; when the vehicle stops following the front vehicle, the ACC running state is 0x4: Standstill, and the engine is allowed to enter automatic stop after the follow-stop state is maintained for a seconds. After the engine enters the automatic stop, the ACC theoretically allows the maximum (180-a) second stop time, during the period, if the vehicle needs to start and the ACC running state is shifted to 0x2: Active, and simultaneously the ACC start-stop permission state is shifted to 0x0: StopForbidden, the engine exits the automatic stop and the vehicle is normally started.
Further, the method comprises the following steps:
and exiting the follow-stop mode when the information of the engine flameout state sent by the engine management system is acquired.
The EMS engine management system includes the following engine operating conditions:
the engine running state: 0x0: Stopped engine stop (shutdown), 0x1: Running engine normal operation, 0x2: Cranking engine start-up process.
When the ACC system is in a start-stop permission mode, the start-stop state of the engine is as follows:
0x0 NoStart-Stop closed, 0x1 Stopped engine, 0x2 Restart engine, 0x3 Running engine normal Running, 0x4 Stopping engine Stop process.
When the engine start-Stop state is 0x0: NoStart-Stop, the driver is indicated to actively close the start-Stop system and cannot enter automatic start-Stop. When not 0x0: NoStart-Stop the EMS needs to determine whether to enter automatic start-Stop based on the signals of the ACC system. The general engine operating state is used as an enabling condition of the ACC, and when the engine operating state is 0x0: Stopped, the ACC function which cannot provide torque for the vehicle needs to be exited. However, due to the addition of the start-stop system, it is necessary to consider that the engine operating state is still 0x0: Stopped when the engine enters the automatic stop, and the ACC cannot be exited at this time. Therefore, when the driver manually operates the shutdown start-stop, the ACC can take the engine running state 0x0: Stopped as an enabling condition; when the driver does not manually turn off the start-stop, it is not a constraint that the ACC does not transition from the other active state to the 0x1 Standby state.
In the embodiment, the follow-up stop and start function of the ACC system is combined with the engine start-stop function of the whole vehicle configuration, so that the automatic start-stop of the engine is realized in the ACC follow-up stop mode, fuel is saved, and the NVH of the whole vehicle is improved. On the premise of not increasing hardware cost, the method can be realized only by adaptively changing and optimizing ACC and EMS application layer software, and has good popularization and application values.
Referring to fig. 2, a vehicle start-stop control method according to a second embodiment of the present invention includes steps S21-S26.
And step S21, when the ACC system enters the following and stopping mode, acquiring an image of the current driving road of the vehicle, and determining the current stopping condition of the vehicle according to the image.
And step S22, when the current parking condition of the vehicle is waiting for the traffic indicator light, acquiring the jump time of the traffic indicator light, and determining the jump time as the waiting time required by the current parking of the vehicle.
And step S23, when the current parking condition of the vehicle is that the vehicle passes through a congestion road section, acquiring the time of passing through the congestion road section, and determining the time of passing through the congestion road section as the waiting time.
In the embodiment, two parking conditions are listed, one is parking waiting caused by road congestion, and the other is parking waiting when waiting for a green light at an intersection. The ACC can determine the current parking condition of the vehicle according to the image acquired by the camera, and comprehensively judges and outputs the parking waiting time. In a specific implementation, the step of determining the current parking status of the vehicle according to the image comprises:
determining whether a traffic indicator lamp exists on the current running road within a preset distance from the vehicle and whether a congested road section exists according to the image;
when a traffic indicator lamp exists in the preset distance, determining the state of the traffic indicator lamp;
when the traffic indicator light is in a red light or yellow light state, determining that the current parking condition of the vehicle is a waiting traffic indicator light;
when the traffic indicator light is in a green light state and a congested road section exists, determining that the current parking condition of the vehicle is that the vehicle passes through the congested road section;
and when no traffic indicator light exists in the preset distance and a congested road section exists, determining that the current parking condition of the vehicle is that the vehicle passes through the congested road section.
The camera of the ACC system can recognize the remaining seconds of the traffic light, the straight-ahead or left-right turning of the ground guide arrow of the own vehicle lane and the congestion of the vehicle in front. When a traffic light is determined to be present in a distance 50m away from a vehicle on a current running road (such as a straight-ahead road), the vehicle is ready to pass through an intersection, and if the traffic light is a red light or a yellow light at the moment, the vehicle needs to stop for waiting, the current parking condition of the vehicle is determined to be a waiting traffic light. When it is determined that the current driving road is a green light and a congested road section exists, it may be determined that the current parking condition of the vehicle is passing through the congested road section.
The waiting time of the traffic light can be determined by the time displayed by the traffic light in the identification image, namely, the number of seconds left by the traffic light is identified.
The time passing through the congested road section can be predicted by analyzing information such as a vehicle travel speed, a length of the congested road section and the like on a current traveling road of the vehicle. Or by vehicle localization and map navigation in the vehicle to determine the transit time from lane recognition and the congested road section ahead.
Step S24, determining whether the waiting time is greater than a threshold, if so, executing step S25, otherwise, executing step S26.
And step S25, starting a start-stop permission mode, and carrying out automatic start-stop control on the engine management system in the start-stop permission mode. The ACC system detects the distance between the vehicle and a front vehicle or the distance between the vehicle and a traffic sign in real time in a start-stop permission mode; and when the distance between the vehicle and the front vehicle is smaller than a first threshold value or the distance between the vehicle and the traffic sign of the front vehicle is smaller than a second threshold value, sending a closing signal to the engine management system so that the engine management system controls the engine to stop.
When the ACC running state is the following-stopping mode (0x4: Standstill), the ESP realizes active hydraulic braking to keep the vehicle in a static state, and a driver does not need to step on a brake pedal, so that the EMS for entering the automatic stopping does not need to consider the brake pedal.
And step S26, starting a start-stop prohibition mode, and controlling an engine of the engine management system to enter an automatic start-stop prohibition state in the start-stop prohibition mode.
The embodiment provides a control strategy suitable for starting and stopping an engine under an ACC working condition, and the NVH of the whole vehicle can be improved and fuel oil can be saved when the ACC is in follow-up stop waiting. On the premise of not increasing hardware cost, the method can be realized only by adaptively changing and optimizing ACC and EMS application layer software, and has good popularization and application values.
Referring to fig. 3, a vehicle start-stop control device according to a third embodiment of the present invention is applied to an ACC system, the ACC system is electrically connected to an engine management system, and the vehicle start-stop control device includes:
the acquiring module 10 is used for acquiring the traffic condition information of the current running road of the vehicle when the ACC system enters a follow-up and stop mode;
a determining module 20, configured to determine, according to the traffic condition information, a waiting time required for the vehicle to stop currently;
a judging module 30, which is used for judging whether the waiting time is higher than a threshold value;
the first starting module 40 is used for starting a start-stop permission mode when the waiting time is not higher than a threshold value, and performing automatic start-stop control on the engine management system in the start-stop permission mode;
and the second starting module 50 is configured to start a start/stop prohibition mode when the waiting time is less than or equal to the threshold, and control the engine of the engine management system to enter an automatic start/stop prohibition state in the start/stop prohibition mode.
Further, in the vehicle start-stop control device, the step of obtaining traffic condition information of a current driving road of the vehicle and determining the waiting time required for the current stop of the vehicle according to the traffic condition information includes:
acquiring an image of a current running road of a vehicle, and determining the current parking condition of the vehicle according to the image;
when the current parking condition of the vehicle is waiting for a traffic indicator light, acquiring the jumping time of the traffic indicator light;
determining the skip time as a waiting time required by the vehicle to stop currently;
when the current parking condition of the vehicle is that the vehicle passes through a congested road section, acquiring the time of passing through the congested road section;
determining a time to pass through the congested road segment as the waiting time.
Further, the vehicle start/stop control device further includes:
the first quitting module is used for quitting the follow-up stop mode and entering the standby mode when the information of the engine flameout state sent by the engine management system is acquired.
Further, the vehicle start/stop control device further includes:
and the second exiting module is used for exiting the follow-up stop mode and entering the standby mode when the fact that the duration time of the follow-up stop mode exceeds the threshold time is detected.
The implementation principle and the generated technical effects of the vehicle start-stop control device provided by the embodiment of the invention are the same as those of the method embodiment, and for the sake of brief description, no part of the embodiment of the device is mentioned, and reference may be made to the corresponding contents in the method embodiment.
The embodiment of the invention also provides a readable storage medium, wherein a computer program is stored on the readable storage medium, and the computer program is used for realizing the vehicle start and stop control method when being executed by a processor.
The embodiment of the invention also provides an ACC system, which comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor implements any one of the vehicle start-stop control methods when executing the computer program.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The vehicle start-stop control method is applied to an ACC system, the ACC system is electrically connected with an engine management system, and the vehicle start-stop control method comprises the following steps:
when the ACC system enters a follow-up parking mode, acquiring traffic condition information of a current driving road of a vehicle, and determining waiting time required by the current parking of the vehicle according to the traffic condition information;
judging whether the waiting time is higher than a threshold value;
if yes, starting a start-stop permission mode, and carrying out automatic start-stop control on the engine management system in the start-stop permission mode;
if not, starting a start-stop prohibition mode, and controlling the engine of the engine management system to enter an automatic start-stop prohibition state in the start-stop prohibition mode.
2. The vehicle start-stop control method according to claim 1, wherein the step of acquiring traffic condition information of a current driving road of the vehicle and determining the waiting time required for the current stop of the vehicle according to the traffic condition information comprises:
acquiring an image of a current running road of a vehicle, and determining the current parking condition of the vehicle according to the image;
when the current parking condition of the vehicle is waiting for a traffic indicator light, acquiring the jumping time of the traffic indicator light;
determining the skip time as a waiting time required by the vehicle to stop currently;
when the current parking condition of the vehicle is that the vehicle passes through a congested road section, acquiring the time of passing through the congested road section;
determining a time to pass through the congested road segment as the waiting time.
3. The vehicle start stop control method of claim 2, wherein the step of determining the current parking condition of the vehicle from the image comprises:
determining whether a traffic indicator lamp exists on the current running road within a preset distance from the vehicle and whether a congested road section exists according to the image;
when a traffic indicator lamp exists in the preset distance, determining the state of the traffic indicator lamp;
when the traffic indicator light is in a red light or yellow light state, determining that the current parking condition of the vehicle is a waiting traffic indicator light;
when the traffic indicator light is in a green light state and a congested road section exists, determining that the current parking condition of the vehicle is that the vehicle passes through the congested road section;
and when no traffic indicator light exists in the preset distance and a congested road section exists, determining that the current parking condition of the vehicle is that the vehicle passes through the congested road section.
4. The vehicle start stop control method of claim 1, wherein the step of automatically starting and stopping the engine management system comprises:
detecting the distance between the vehicle and the front vehicle or the distance between the vehicle and the traffic sign;
and when the distance between the vehicle and the front vehicle is smaller than a first threshold value or the distance between the vehicle and the traffic sign of the front vehicle is smaller than a second threshold value, sending a closing signal to the engine management system so that the engine management system controls the engine to stop.
5. The vehicle start-stop control method of claim 1, wherein the step of disabling start-stop mode and sending a control signal to the engine management system to disable engine shutdown further comprises:
and when the information of the engine flameout state sent by the engine management system is acquired, exiting the follow-stop mode and entering a standby mode.
6. The vehicle start stop control method of claim 1, wherein the step of disabling the start stop mode for automatic start stop control of the engine management system is further followed by:
and when the follow-up stop mode is detected to have the duration time exceeding the threshold time, exiting the follow-up stop mode and entering the standby mode.
7. A vehicle start-stop control device is applied to an ACC system, the ACC system is electrically connected with an engine management system, and the vehicle start-stop control device comprises:
the acquisition module is used for acquiring the traffic condition information of the current running road of the vehicle when the ACC system enters a follow-up and stop mode;
the determining module is used for determining the waiting time required by the current parking of the vehicle according to the traffic condition information;
the judging module is used for judging whether the waiting time is higher than a threshold value or not;
the first starting module is used for starting a start-stop permission mode when the waiting time is not higher than a threshold value, and automatically controlling the start and stop of the engine management system under the start-stop permission mode;
and the second starting module is used for starting a start-stop prohibition mode when the waiting time is less than or equal to the threshold value, and controlling the engine of the engine management system to enter an automatic start-stop prohibition state in the start-stop prohibition mode.
8. The vehicle start-stop control device according to claim 7, wherein the step of acquiring traffic condition information of a current driving road of the vehicle and determining the waiting time required for the current stop of the vehicle according to the traffic condition information comprises:
acquiring an image of a current running road of a vehicle, and determining the current parking condition of the vehicle according to the image;
when the current parking condition of the vehicle is waiting for a traffic indicator light, acquiring the jumping time of the traffic indicator light;
determining the skip time as a waiting time required by the vehicle to stop currently;
when the current parking condition of the vehicle is that the vehicle passes through a congested road section, acquiring the time of passing through the congested road section;
determining a time to pass through the congested road segment as the waiting time.
9. A readable storage medium on which a computer program is stored, characterized in that the program, when executed by a processor, implements a vehicle start stop control method according to any one of claims 1 to 6.
10. An ACC system comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor, when executing the computer program, implements the vehicle start stop control method of any one of claims 1 to 6.
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| CN202011622046.9A CN112693462A (en) | 2020-12-30 | 2020-12-30 | Vehicle start and stop control method and device, ACC system and readable storage medium |
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| CN202011622046.9A CN112693462A (en) | 2020-12-30 | 2020-12-30 | Vehicle start and stop control method and device, ACC system and readable storage medium |
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