阅读说明：本技术 一种p挡驻车系统控制方法和系统 (P-gear parking system control method and system ) 是由 郭振戈 付丽 齐士举 刘浩凌 余家佳 于 2020-07-13 设计创作，主要内容包括：本发明公开了一种P挡驻车系统控制方法,当整车下电时,检测P挡挡位信号、驱动电机转速信号和车速信号协同判断驱动P挡执行器保持当前位置或锁止；当整车上电时,检测刹车踏板信号、主驾安全带卡扣插入信号和车门关闭信号协同判断驱动P挡执行器保持当前位置或解锁。本发明其可以提升车辆的安全性,避免发生溜坡,或者在不安全的状态下解除P挡。(The invention discloses a control method of a P-gear parking system, which is characterized in that when a whole vehicle is powered off, a P-gear signal, a driving motor rotating speed signal and a vehicle speed signal are detected to cooperatively judge whether a P-gear actuator is driven to keep the current position or lock; when the whole vehicle is powered on, a brake pedal signal, a main driving safety belt buckle insertion signal and a vehicle door closing signal are detected to cooperatively judge and drive the P-gear actuator to keep the current position or unlock. The invention can improve the safety of the vehicle, avoid the occurrence of slope slipping or remove the P gear in an unsafe state.)

1. A control method of a P-gear parking system is characterized by comprising the following steps: when the whole vehicle is powered off, detecting a P gear signal, a driving motor rotating speed signal and a vehicle speed signal to cooperatively judge whether a driving P gear actuator keeps the current position or is locked; when the whole vehicle is powered on, a brake pedal signal, a main driving safety belt buckle insertion signal and a vehicle door closing signal are detected to cooperatively judge and drive the P-gear actuator to keep the current position or unlock.

2. The P range parking system control method according to claim 1, characterized in that: when the whole vehicle is powered off and the current gear is the P gear, the relay is disconnected, and the P gear controller and the P gear actuator are powered off.

3. The P range parking system control method according to claim 1, characterized in that: when the whole vehicle is powered off and the front P gear is the D/R gear, the high-voltage connection of the vehicle is cut off, power transmission is interrupted, and the gear is switched to the N gear.

4. The P range parking system control method according to any one of claims 1 to 3, characterized in that: when the whole vehicle is powered off, the current gear is N, the rotating speed signal of the driving motor can be obtained, and the rotating speed signal of the driving motor is less than or equal to the calibrated rotating speed 2, the relay is switched on, and the P-gear actuator is locked.

5. The P range parking system control method according to any one of claims 1 to 3, characterized in that: when the whole vehicle is powered off, the current gear is N gear, the rotating speed signal of the driving motor can be acquired, the rotating speed signal of the driving motor is greater than the calibration rotating speed 2, and the duration time is 2 times the calibration time, the relay is switched on, and the P gear actuator is locked.

6. The P range parking system control method according to any one of claims 1 to 3:

when the whole vehicle is powered off, the current gear is N gear, the rotating speed signal of the driving motor can be obtained, the rotating speed signal of the driving motor is greater than the calibration rotating speed 2, and the duration time is less than the calibration time 2, the relay is switched on, and the P gear actuator is kept.

7. The P range parking system control method according to any one of claims 1 to 3: when the whole vehicle is powered off, the gear is N, the rotating speed signal of the driving motor cannot be acquired, and the vehicle speed is less than or equal to the calibrated vehicle speed 2, the relay is switched on, and the P-gear actuator is locked.

8. The P range parking system control method according to any one of claims 1 to 3: when the whole vehicle is powered off, the current gear is N gear, the rotating speed signal of the driving motor cannot be acquired, the vehicle speed is greater than the calibrated vehicle speed 2, and the duration time is equal to the calibrated time 2, the relay is switched on, and the P gear actuator is locked.

9. The P range parking system control method according to any one of claims 1 to 3: when the whole vehicle is powered off, the current speed is N gear, the rotating speed signal of the driving motor can not be obtained, the vehicle speed is greater than the calibrated vehicle speed 2, and the duration is less than the calibrated time 2, the relay is switched on, and the P gear actuator is kept.

10. The P range parking system control method according to claim 1, characterized in that: when the whole vehicle is powered on, a driver releases the P gear operation through the gear shifter, the P gear controller detects whether a brake pedal is stepped on, whether a main driving safety belt buckle is inserted and whether a vehicle door is completely closed, when all the conditions are met, the whole vehicle controller sends an unlocking instruction to the P gear actuator, and otherwise, the unlocking instruction is not sent.

11. A P keeps off parking system control which characterized in that: the electric shifter is in communication connection with the vehicle control unit, the P gear controller is in communication connection with the vehicle control unit, the instrument is in communication connection with the vehicle control unit, the P gear controller is in communication connection with the P gear actuator, the vehicle control unit is electrically connected with the P gear controller between the P gear controller and the vehicle control unit and provided with the relay, and the vehicle control unit controls the power supply of the P gear controller and the P gear actuator through the relay.

Technical Field

The invention relates to the field of automobile control, in particular to a control method and a control system of a P-gear parking system.

Technical Field

With the development of social economy, the quantity of automobile reserves is gradually increased. Meanwhile, people pay more and more attention to the safety of the automobile, for example, more automobiles are provided with a P-gear parking system, and the P-gear parking system can realize parking at a certain gradient and a certain speed.

The Chinese invention patent CN103574021A discloses a control method of an electric vehicle parking locking system, which comprises the steps of obtaining an operation signal input by a driver from a steering column; acquiring vehicle running parameters; generating an operation command based on the vehicle running parameter and the operation signal; providing an operating command to the gearbox for execution by the gearbox; and converting the operation command into display information and providing the display information for the instrument panel to display. The scheme mainly detects a vehicle speed signal and a gear signal, and controls a P gear instruction: 1. if the vehicle speed is less than 5km/h and the gear request is a gear P, executing a gear P locking instruction; 2. if the main driving door is opened, the speed is less than 5km/h, and the current gear is D/R/N, executing a P gear locking instruction; 3. the vehicle speed is zero, and if the key is pulled out, a P gear locking instruction is executed; 4. and when the motor runs and the brake is started and the gear is D/R/N, executing a P gear unlocking instruction. The technical defects of the technical scheme are as follows: the speed of a motor vehicle is zero, and when the key is pulled out, just can carry out the locking, can not avoid following danger: 1. the vehicle is temporarily stopped on a ramp, a driver is powered off after engaging N gears, if a key is pulled off, the vehicle speed is not zero, and a P gear cannot be locked to avoid danger; 2. if the driver stops on the ramp, and does not pull out the key after flameout, the scheme can not lock the P gear to avoid danger; 3. it is too simple to release the restriction of P range, possibly when the driver or vehicle is in an unsafe condition.

Chinese invention patent CN110748642A discloses a method for controlling parking in P gear of an automobile, an electronic device and an automobile, wherein the method comprises the following steps: responding to a vehicle power-on event, and executing P gear unlocking operation; or executing the P-gear parking operation in response to the vehicle power-off event. According to the invention, when the whole vehicle is powered on or powered off, the P-gear unlocking operation or the P-gear parking operation is executed in advance, and the P-gear parking or unlocking is not performed by responding to the gear shifting event of the gear shifting lever, so that the unlocking or parking of the P-gear lock controlled by the gear shifting lever is omitted, and the waiting time is reduced. The technical scheme has the following technical defects: 1. after the whole vehicle is electrified, the P gear is unlocked in advance, and if a driver or the vehicle is in an unsafe state, danger can be caused by directly unlocking the P gear; 2. after the whole vehicle is powered off, the P gear is locked in advance, and if the vehicle slips down a slope and the driver does not step on the brake, the scheme cannot avoid danger.

Disclosure of Invention

In view of the above disadvantages, the present invention provides a P-range control system and a control method thereof, which can improve the safety of a vehicle, avoid a slope slip, or release the P-range in an unsafe state.

The invention discloses a control method of a P-gear parking system, which is characterized in that when a whole vehicle is powered off, a P-gear signal, a driving motor rotating speed signal and a vehicle speed signal are detected to cooperatively judge whether a P-gear actuator is driven to keep the current position or lock; when the whole vehicle is powered on, a brake pedal signal, a main driving safety belt buckle insertion signal and a vehicle door closing signal are detected to cooperatively judge and drive the P-gear actuator to keep the current position or unlock.

In a preferred embodiment of the invention, when the whole vehicle is powered off and the current gear is the P gear, the relay is disconnected, and the P gear controller and the P gear actuator are powered off.

In a preferred embodiment of the invention, when the whole vehicle is powered off and the front P gear is the D/R gear, the high-voltage connection of the vehicle is cut off, the power transmission is interrupted, and the gear is switched to the N gear.

In a preferred embodiment of the invention, when the whole vehicle is powered off, the current gear is N gear, the rotating speed signal of the driving motor can be acquired, and the rotating speed signal of the driving motor is less than or equal to the calibrated rotating speed 2, the relay is switched on, and the P gear actuator is locked.

In a preferred embodiment of the invention, when the whole vehicle is powered off, the current gear is N gear, the rotating speed signal of the driving motor is available, the rotating speed signal of the driving motor is greater than the nominal rotating speed 2, and the duration time is equal to the nominal time 2, the relay is turned on, and the P-gear actuator is locked.

In a preferred embodiment of the invention, when the whole vehicle is powered off, the current gear is N gear, the rotating speed signal of the driving motor can be obtained, the rotating speed signal of the driving motor is greater than the calibrated rotating speed 2, and the duration is less than the calibrated time 2, the relay is switched on, and the P gear actuator is kept.

In a preferred embodiment of the invention, when the whole vehicle is powered off, the gear is N, the rotating speed signal of the driving motor cannot be acquired, and the vehicle speed is less than or equal to the calibrated vehicle speed 2, the relay is switched on, and the P-gear actuator is locked.

In a preferred embodiment of the invention, when the whole vehicle is powered off, the current gear is the N gear, the rotating speed signal of the driving motor is unavailable, the vehicle speed is greater than the calibrated vehicle speed 2, and the duration time is the calibrated time 2, the relay is switched on, and the P gear actuator is locked.

In a preferred embodiment of the invention, when the whole vehicle is powered off, the current speed is N gear, a rotating speed signal of a driving motor is unavailable, the vehicle speed is greater than the calibrated vehicle speed 2, and the duration time is less than the calibrated time 2, the relay is switched on, and the P gear actuator is kept.

In a preferred embodiment of the invention, after the whole vehicle is powered on, when a driver performs P-gear releasing operation through a gear shifter, a P-gear controller detects whether a brake pedal is stepped on, whether a main driving safety belt buckle is inserted and whether a vehicle door is completely closed, and when the above conditions are all met, the whole vehicle controller sends an unlocking instruction to a P-gear actuator, otherwise, the unlocking instruction is not sent.

The invention also discloses a P-gear parking system control which comprises an electronic gear shifter, a vehicle control unit, a P-gear controller, a P-gear actuator and a relay, wherein the electronic gear shifter is in communication connection with the vehicle control unit, the P-gear controller is in communication connection with the P-gear actuator, the P-gear controller is electrically connected between the vehicle control unit and the P-gear controller and is provided with the relay, and the vehicle control unit controls the power supply of the P-gear controller and the P-gear actuator through the relay.

The invention has the beneficial effects that: the control method is simple in logic, stable and efficient, can effectively improve the safety of the vehicle, avoids the occurrence of slope slipping or relieves the P gear in an unsafe state; the invention effectively avoids the unsafe state of a driver or a vehicle caused by simple locking of the gear P through the cooperative judgment of the gear P signal, the rotating speed signal of the driving motor and the vehicle speed signal, and simultaneously can lock the gear P to avoid vehicle sliding even if the vehicle is temporarily stopped on a slope, the driver is powered off after the gear N is engaged, and the vehicle speed is not zero if a key is pulled off.

Drawings

Fig. 1 is a system composition of a P-range control system and a control method thereof according to an embodiment of the invention;

FIG. 2; the invention relates to a P gear control system and a control method thereof, which are a flow chart according to the embodiment of the invention;

in the figure, an ESM (electric control system) -electronic gear shifter VCU-vehicle controller PGU-P gear controller activator-P gear executing motor and a relay-relay are arranged.

Detailed Description

Embodiments of the present invention will be described in detail below, it should be noted that the embodiments described below with reference to the accompanying drawings are only exemplary and are only used for explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the invention it is to be noted that, unless otherwise explicitly stated or specified, the terms "mounted", "connected" and "connected" are to be understood broadly, e.g. as a fixed connection, a detachable connection or an integral connection; mechanical connection or electrical connection can be realized; they may be connected directly or indirectly through an intermediate medium, or they may be connected internally to the two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.

The invention discloses a control method of a P-gear parking system, which is characterized in that when a whole vehicle is powered off, a P-gear signal, a driving motor rotating speed signal and a vehicle speed signal are detected to cooperatively judge whether a P-gear actuator is driven to keep the current position or lock; when the whole vehicle is powered on, a brake pedal signal, a main driving safety belt buckle insertion signal and a vehicle door closing signal are detected to cooperatively judge and drive the P-gear actuator to keep the current position or unlock.

When the whole vehicle is powered off and the current gear is the P gear, the relay is disconnected, and the P gear controller and the P gear actuator are powered off.

When the whole vehicle is powered off and the front P gear is the D/R gear, the high-voltage connection of the vehicle is cut off, power transmission is interrupted, and the gear is switched to the N gear.

When the whole vehicle is powered off, the current gear is N, the rotating speed signal of the driving motor can be obtained, and the rotating speed signal of the driving motor is less than or equal to the calibrated rotating speed 2, the relay is switched on, and the P-gear actuator is locked.

When the whole vehicle is powered off, the current gear is N gear, the rotating speed signal of the driving motor can be acquired, the rotating speed signal of the driving motor is greater than the calibration rotating speed 2, and the duration time is 2 times the calibration time, the relay is switched on, and the P gear actuator is locked.

When the whole vehicle is powered off, the current gear is N gear, the rotating speed signal of the driving motor can be obtained, the rotating speed signal of the driving motor is greater than the calibration rotating speed 2, and the duration time is less than the calibration time 2, the relay is switched on, and the P gear actuator is kept.

When the whole vehicle is powered off, the gear is N, the rotating speed signal of the driving motor cannot be acquired, and the vehicle speed is less than or equal to the calibrated vehicle speed 2, the relay is switched on, and the P-gear actuator is locked.

When the whole vehicle is powered off, the current gear is N gear, the rotating speed signal of the driving motor cannot be acquired, the vehicle speed is greater than the calibrated vehicle speed 2, and the duration time is equal to the calibrated time 2, the relay is switched on, and the P gear actuator is locked.

When the whole vehicle is powered off, the current speed is N gear, the rotating speed signal of the driving motor can not be obtained, the vehicle speed is greater than the calibrated vehicle speed 2, and the duration is less than the calibrated time 2, the relay is switched on, and the P gear actuator is kept.

When the whole vehicle is powered on, a driver releases the P gear operation through the gear shifter, the P gear controller detects whether a brake pedal is stepped on, whether a main driving safety belt buckle is inserted and whether a vehicle door is completely closed, when all the conditions are met, the whole vehicle controller sends an unlocking instruction to the P gear actuator, and otherwise, the unlocking instruction is not sent.

The specific control logic of the invention is explained in conjunction with fig. 2 as follows:

when the whole vehicle is powered off and the front P gear is the P gear, the relay is disconnected, and the P gear controller and the P gear actuator are powered off.

When the whole vehicle is powered off, the front P gear is N gear, the rotating speed signal of the driving motor can be acquired, and the rotating speed signal of the driving motor is less than or equal to the calibrated rotating speed 2, the relay is switched on, and the P gear actuator is locked.

When the whole vehicle is powered off, the front P gear is an N gear, the rotating speed signal of the driving motor can be acquired, the rotating speed signal of the driving motor is greater than the calibration rotating speed 2, and the duration time is 2 times the calibration time, the relay is switched on, and the P gear actuator is locked.

When the whole vehicle is powered off, the front P gear is N gear, the rotating speed signal of the driving motor can be acquired, the rotating speed signal of the driving motor is greater than the calibration rotating speed 2, and the duration time is less than the calibration time 2, the relay is switched on, and the P gear actuator is kept.

When the whole vehicle is powered off, the front P gear is N gear, the rotating speed signal of the driving motor cannot be acquired, and the vehicle speed is less than or equal to the calibrated vehicle speed 2, the relay is switched on, and the P gear actuator is locked.

When the whole vehicle is powered off, the front P gear is an N gear, the rotating speed signal of the driving motor cannot be acquired, the vehicle speed is greater than the calibrated vehicle speed 2, and the duration time is equal to the calibrated time 2, the relay is switched on, and the P gear actuator is locked.

When the whole vehicle is powered off, the front P gear is an N gear, a rotating speed signal of a driving motor cannot be acquired, the vehicle speed is greater than the calibrated vehicle speed 2, and the duration is less than the calibrated time 2, the relay is switched on, and the P gear actuator is kept.

When the whole vehicle is powered off and the front P gear is the D/R gear, the high-voltage connection of the vehicle is cut off, power transmission is interrupted, and the gear is switched to the N gear.

The invention discloses a P-gear parking system control which comprises an electronic gear shifter, a vehicle control unit, a P-gear controller, a P-gear actuator, an instrument and a relay, wherein the electronic gear shifter is in communication connection with the vehicle control unit, the P-gear controller is in communication connection with the vehicle control unit, the instrument is in communication connection with the vehicle control unit, the P-gear controller is in communication connection with the P-gear actuator, the P-gear controller is electrically connected between the vehicle control unit and the P-gear controller and provided with the relay, and the vehicle control unit controls the power supply of the P-gear controller and the P-gear actuator through the relay.

It should be understood that the above are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily made by those skilled in the art within the technical scope of the present invention disclosed herein should be covered within the scope of the present invention.