A vehicle control method and a power system for hybrid vehicles

Abstract

The invention provides a vehicle control method and a power system for hybrid vehicles. The method includes the following steps: start request information can be respectively sent to a vehicle controlunit (VCU), a motor control module (ENG) and an engine control module (ECM) after a vehicle body control module (BCM) detects the start signal of a hybrid vehicle; when a backup module is set in oneof the BCM, ENG and ECM, a self-examination command can be respectively sent to a transmission control unit (TCU), a battery management module (BMS) and a secondary motor controller if the backup module does not receive feedback information generated by the VCU based on the start request information in the preset time; and the backup module can send a start instruction to control the hybrid vehicle to start when judging that the hybrid vehicle meets starting conditions according to the received self-examination result information returned by the TCU, the BMS and the secondary motor controllerand acquiring that the code matching of the ECM and the ENG is successful through detection. The hybrid vehicle can still be driven and controlled to run to a target place when the VCU fails, and thus, the vehicle safety can be guaranteed.

Description

Technical field [0001] The invention relates to the technical field of automobile control, in particular to a vehicle control method and power system of a hybrid electric vehicle. Background technique [0002] Generally, the vehicle controller in a hybrid vehicle is the core component of the vehicle control system of a hybrid vehicle. After collecting various signals and making corresponding judgments, the controllers of various components are controlled to perform corresponding operations to realize the control of the entire vehicle. [0003] In related technologies, in order to ensure the safety of the vehicle, when the vehicle controller fails, the vehicle is prohibited from being powered on by turning off the generator and cutting off the bus high voltage system, so that the vehicle cannot be driven. However, the above method makes the vehicle can only stop in place and wait for rescue when the vehicle controller fails, which is low in safety. Summary of the invention [0004]...

AI Technical Summary

Problems solved by technology

[0003] In related technologies, in order to ensure the safety of the vehicle, when the vehicle controller fails, the vehicle is prohibited from being powered on by turning off the generator and cutting off the bus high-voltage system, so that the vehicle cannot drive

However, the above-mentioned method makes the vehicle can only stop in place and wait for rescue when the vehicle controller fails, and the safety is low.

Images