Control method and control system for P gear parking system

Abstract

The invention discloses a P gear parking system control method which comprises the following steps: when a complete vehicle is powered off, detecting a P gear signal, a driving motor rotary speed signal and a vehicle speed signal to collaboratively judge and drive a P gear actuator to keep the current position or lock; and when the complete vehicle is powered on, detecting a brake panel signal, adriver seat belt buckle inserting signal and a vehicle door closing signal to collaboratively judge and drive the P gear actuator to keep the current position or unlock. The P gear parking system control method can improve the vehicle safety to prevent the vehicle from sliding a slope or preventing the P gear from being removed in the unsafe state.

Description

technical field [0001] The invention relates to the field of automobile control, in particular to a control method and system for a P gear parking system. [0002] technical background [0003] With the development of social economy, the number of cars is gradually increasing. At the same time, people are paying more and more attention to car safety. For example, more vehicles are equipped with a P-block parking system, which can realize parking on a certain slope and a certain speed. [0004] Chinese invention patent CN103574021A discloses a control method for the parking lock system of an electric vehicle, which includes obtaining an operating signal input by the driver from the steering column; obtaining vehicle driving parameters; generating an operating command based on the vehicle driving parameters and the operating signal; operating the The command is provided to the gearbox and the gearbox executes the operation command; the operation command is converted into displ...

AI Technical Summary

Problems solved by technology

The technical defects in the above-mentioned technical solution are: when the speed of the vehicle is zero and the key is pulled out, the lock will be executed, and the following dangers cannot be avoided: 1. The vehicle is temporarily parked on the ramp, and the driver switches off the power after the driver is in the N gear. When the key is pulled out, the vehicle speed is not zero, and the P gear cannot be locked to avoid danger; 2. If the driver stops on a ramp and the engine is turned off without pulling out the key, this solution cannot lock the P gear to avoid danger; 3. Release The restriction of the P gear is too simple, and it is possible that the driver or the vehicle is in an unsafe state at this time

This technical solution has the following technical defects: 1. After the vehicle is powered on, the P gear is unlocked in advance. If the driver or the vehicle is in an unsafe state, unlocking the P gear directly may cause danger; 2. After the vehicle is powered off , lock the P gear in advance, if the vehicle has already slipped and the driver does not step on the brake, this scheme cannot avoid danger

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