CN116279543A

CN116279543A - Vehicle control method during abnormal exit of idle start-stop function

Info

Publication number: CN116279543A
Application number: CN202310000243.4A
Authority: CN
Inventors: 王保良; 张兴健; 王雄; 蒋平; 聂相虹
Original assignee: Chongqing Changan Automobile Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2023-01-02
Filing date: 2023-01-02
Publication date: 2023-06-23

Abstract

The invention provides a vehicle control method when an idle start-stop function is abnormal, which comprises the following steps: if the idle speed start-stop function of the vehicle is started, judging whether abnormal exit of the idle speed start-stop function occurs when the engine is in a stop state; if the idle start-stop function abnormal exit occurs when the engine is in a stop state, entering a vehicle safety protection logic for controlling the engine state, the parking calipers and the alarm prompt.

Description

Vehicle control method during abnormal exit of idle start-stop function

Technical Field

The invention provides the field of vehicle safety control, and particularly relates to a vehicle control method during abnormal exit of an idle start-stop function.

Background

As a technical solution capable of effectively reducing fuel consumption of a vehicle, idle start-stop is increasingly carried out in vehicles. However, the driving comfort of the normal control process is mainly focused in the current idle start-stop function logic design. If the vehicle is in abnormal exit in the idle start-stop state, the existing control logic lacks sufficient vehicle safety protection measures and powerful reminding for a driver. Thus, the abnormality is easily ignored by the driver, and the engine cannot be started smoothly when there is a start intention. If the vehicle is on the ramp, the condition of sliding the vehicle can be caused, and then traffic accidents are caused.

Disclosure of Invention

The invention develops a vehicle safety protection logic aiming at the abnormal exit working condition of the idle start-stop function in the actual driving process, and particularly relates to a vehicle control method during the abnormal exit of the idle start-stop function.

The technical scheme of the invention is as follows:

the invention provides a vehicle control method when an idle start-stop function is abnormal, which comprises the following steps:

if the idle speed start-stop function of the vehicle is started, judging whether abnormal exit of the idle speed start-stop function occurs when the engine is in a stop state;

if the idle start-stop function abnormal exit occurs when the engine is in a stop state, entering a vehicle safety protection logic for controlling the engine state, the parking calipers and the alarm prompt.

Preferably, the step of entering vehicle safety protection logic for controlling the engine state, the parking caliper and the warning cues comprises:

switching the engine state from the stop state to the to-be-started state, and controlling an engine state indicator lamp on the instrument screen to display the to-be-started state;

controlling the clamping of the parking calipers, and lighting a brake indicator lamp on the instrument screen;

and controlling the emergency alarm lamp of the vehicle to be turned on, and lighting the emergency alarm indicator lamp on the instrument screen.

Preferably, the parking caliper clamping is controlled by sending an instruction to an EPBi system of the vehicle, the EPBi system sends an EPB pulling instruction, and an EPB executing mechanism of the vehicle commands the parking caliper clamping action according to the EPB pulling instruction.

Preferably, the brake indicator on the meter screen is turned on by sending an instruction to the EPBi system to cause the EPBi system to request the meter system to execute a command to turn on the brake indicator on the meter screen.

Preferably, controlling the turning on of the emergency warning light of the vehicle is achieved by issuing an instruction to the vehicle body control system to cause the vehicle body control system to request the meter system to execute a command to turn on the emergency warning light on the meter screen.

The beneficial effects of the invention are as follows:

the logic can judge whether the idle start-stop shutdown state is abnormal to exit or not when the idle start-stop function shutdown state is in the idle start-stop function shutdown state, if the idle start-stop shutdown state is detected to be abnormal to exit, the safety of a vehicle can be guaranteed through a series of operations, and the user is reminded of paying attention through the modes of instrument display, emergency alarm lamp flashing and the like. The method has no change to most of the existing vehicle hardware, only needs to perfect the software function of the corresponding control system, and can improve the driving safety of the vehicle.

Drawings

FIG. 1 is a block diagram of a vehicle control system at the time of abnormal exit from a stopped state of an idle start-stop function in the present embodiment;

FIG. 2 is a flow chart of vehicle control at the time of abnormal exit from the idle stop-start function stop state in the present embodiment;

FIG. 3 is a flowchart of an idle start-stop function stop state abnormal exit judgment in the present embodiment;

fig. 4 is a control flow chart of the subsystem of the vehicle control system in the present embodiment.

Detailed Description

The system block diagrams of the present disclosure are only used as relationships between the components of the system. The flowcharts of this disclosure are only used to characterize the operational logic relationships between the control/execution subsystems, and in practical applications, there may be a variety of ways in which the subsystems may be interconnected and in which signals may be transmitted, as should be appreciated. The signal transfer module may be a separate physical part in the actual product, or may be one of functions of a certain control unit of other control systems. The manufacturer can set different conditions as key influencing factors according to the understanding of the idle start-stop technology and the vehicle function configuration. This has been set forth in the description of the corresponding flow, and therefore, the functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the generic technical logic for the disclosure and not as a limitation on the logic of the invention. If any logic which judges the abnormal exit working condition of the idle start-stop function in the stop state according to a certain condition or a group of conditions and further carries out the logic processing of the vehicle safety protection is included in the protection scope of the invention.

The disclosure is further described below with reference to the drawings accompanying the specification:

fig. 1 is a system block diagram of triggering vehicle safety protection logic when an idle start-stop function is implemented and a stop state is abnormal to exit in the present embodiment. The whole system mainly comprises subsystems such as an EMS control system 20, an EPBi system 30, a vehicle body control system 40, a lamplight system 50, an instrument system 60 and the like. The EMS control system 20, the EPBi system 30, the vehicle body control system 40 and the instrument system 60 are in data communication connection through the bus 10, so that a bidirectional communication function is realized. The vehicle status signals collected by the vehicle sensor system 70 are converted by the signal relay module 80 for use by the relevant system.

FIG. 2 is a flow chart of the idle start-stop function shutdown state exception exit, executing the vehicle safety protection logic. Step 21 is first performed: the EMS control system 20 judges whether the idle start-stop function control stop occurs or not; if the judgment result is N, the judgment is continuously executed. If the judgment result is Y, the step 22 is entered: judging whether the subsystem is abnormally exited or not according to the idle start-stop function stop state. If the judgment result is N, the judgment is continuously carried out. If the judgment result is Y, step 23 is executed: entering the vehicle safety protection logic. The entire workflow ends.

FIG. 3 is a flow chart of a subsystem for determining an idle start-stop system by abnormal exit of idle start-stop function in a shutdown state. The sub-process can have 1 or more judgment conditions according to the actual product design, and the concise work flow can be described as follows: the vehicle sensor 1 in the vehicle sensor system 70 acquires a parameter 71 (specifically, a driver side door open/close state, which is an abnormal state when the driver side door state is open), and the acquired parameter is subjected to signal processing 81 by the signal relay module system 80, and signal transmission 82 is performed. The EMS control system 20 reads the signal 221. If more parameters are needed in the logic design to perform abnormal exit judgment of the idle start-stop function in the stop state, the vehicle sensor n acquires the parameters A (n=1, 2, 3, 4 …, n is an integer), correspondingly processes B by the signal, and performs signal transmission C. The EMS control system 20 reads the signal D. After the EMS control system 20 reads the signal D, it starts to check whether a state change 222 occurs in 1 or more sensors, and if the check result is N (e.g., the driver side door state remains in the closed state), that is, the key sensor parameter state is not changed, the sensor acquisition parameters continue to be read. If the check result is Y (the state of the door of the side of the driver is switched from the closed state to the open state), the change of 1 or more key sensor acquisition parameters appears. At this time, an idle start-stop function stop state abnormal exit state 223 is issued, and the flow ends.

FIG. 4 is a control flow diagram of the various subsystems of the vehicle control system for the idle start-stop function to implement vehicle safety protection logic. First, the EMS control system 20 performs step 231: and judging whether to execute the vehicle safety protection logic, if so, repeating the judgment. If the judgment result is Y, the flow chart carries out the next action. According to the design intention of the vehicle safety protection logic, three branches are required to be executed.

A first branch: changing the engine state from the stopped state to the to-be-started state 232 is performed by the EMS control system 20 and a request is made to the meter system 60, and an engine state indicator on the meter screen is performed to display that the engine is in the to-be-started state 601. The first branching flow ends.

The second branch: the EMS control system 20 requests the EPBi system 30 to send an EPB pulling command 301, and the EPBi system controls the EPB executing mechanism 302 to execute the action of clamping the parking caliper 303. While the EPBi system 30 requests the meter system 60 to execute the on-brake indicator 602 command on the meter screen. The second branch flow ends.

Third branch: the vehicle body control system 40 is requested by the EMS control system 20 to issue an open emergency warning lamp command 401, and the lighting system 50 is requested by the vehicle body control system 40 to perform an open emergency warning lamp operation. At the same time, the meter system 60 is requested by the body control system 40, and the turn-on emergency alert indicator light command 603 is executed on the meter screen. The third branch flow ends.

The three processing branches, wherein the first branch mainly plays a role in changing the running state of the whole vehicle, so that the vehicle is ensured not to be started by mistake; the second branch is mainly used for executing clamping actions of the parking calipers, so that abnormal running states such as sliding of the vehicle can not occur; the third branch is mainly an acousto-optic reminding, which reminds a driver of paying attention to the running state of the vehicle and further actively removes the abnormal state of the vehicle according to the actual situation.

Claims

1. A vehicle control method at abnormal exit of an idle start-stop function, comprising:

2. The method of claim 1, wherein the step of entering vehicle safety protection logic for engine state, parking caliper and warning alert control comprises:

3. The method according to claim 2, wherein the parking caliper clamping is controlled by issuing an EPBi command to an EPBi system of the vehicle, the EPBi system issuing an EPB pull command, and an EPB actuator of the vehicle commanding a parking caliper clamping operation in accordance with the EPB pull command.

4. The method according to claim 2, wherein the turning on of the brake indicator on the meter screen is performed by giving an instruction to the EPBi system to cause the EPBi system to request the meter system to execute a command to turn on the brake indicator on the meter screen.

5. The method for controlling a vehicle at the time of abnormal exit of an idle start-stop function according to claim 2, wherein controlling the turning on of an emergency warning lamp of the vehicle is performed by giving an instruction to a vehicle body control system to make the vehicle body control system request to request an instrument system to execute a command to turn on the emergency warning lamp on an instrument screen.