Intelligent crawling control strategy for pure electric vehicle

Abstract

The invention discloses an intelligent crawling control strategy for a pure electric vehicle. Judgment conditions for entering crawling are added, i.e., a driver off-seat alarm is invalid, a driver safety belt unfastening alarm is invalid, and a radar detection alarm signal is invalid. The two judgment conditions of the driver off-seat alarm is invalid and the driver safety belt unfastening alarmis invalid are met, the driver meets requirement of safe driving; and if the driver off-seat alarm is valid or the driver safety belt unfastening alarm is valid, a seat sends a load control alarm signal to an instrument, and the instrument sends an alarm icon and reminds the driver to recover the correct sitting posture and fasten the safety belt. The radar detection alarm signal detects whether pedestrians or obstacles exist on a preset advancing road of the vehicle or not through four radars so as to determine whether the vehicle is suitable for entering the crawling function or not. According to the invention, the perception ability of the vehicle to the driving intention of the driver and the surrounding environment is enhanced, wrong driving behaviors caused by misoperation, forgetting and non-standard driving habits of the driver are reduced, and unsafe accidents are avoided.

Description

Technical field: [0001] The invention relates to an intelligent creep control strategy for a pure electric vehicle. Background technique: [0002] The existing car creep function control program is relatively simple, with a single logic and no safety treatment, which is prone to unsafe accidents caused by driver operation errors. Entering the READY state, forgetting to pull the handbrake, not stepping on the brake pedal, the car automatically enters the creep function; the car drives to a stop, the driver leaves the seat without pulling the handbrake, etc., all of which are prone to unsafe accidents. [0003] At present, the creeping function safety of pure electric buses is relatively low, and the current technical scheme is as follows: [0004] The conditions for the vehicle to enter the creep function: the vehicle Ready is valid; the D gear / R gear is valid; the handbrake is invalid; the brake is invalid; the accelerator is invalid; the relationship between the above is a...

AI Technical Summary

Problems solved by technology

[0006] 1) The crawling process of the vehicle is unstable when starting, and it is prone to vehicle vibration and forward rush;

[0007] 2) The driver is required to operate at a very high level, and misoperation may easily lead to serious safety accidents;

[0008] 3) High requirements for drivers' driving habits and safety awareness;

[0009] 4) It is difficult for the driver to perceive and control the speed of the vehicle when the vehicle is reversed and creeping;

[0010] 5) When creeping has been entered, when the driver exits the creeping function by depressing the accelerator pedal, the speed torque corresponding to the real-time vehicle speed conflicts with the accelerator pedal request value at this time

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