Vehicle control method and power system of hybrid electric vehicle

Abstract

The invention provides a vehicle control method and a power system of a hybrid electric vehicle. The vehicle control method comprises the steps that after a body control module (BCM) detects a start signal of the hybrid electric vehicle, start request information is separately sent to a vehicle control unit (VCU), an electric machine control module (ENG) and an engine control module (ECM); when one of the BCM, the ENG and the ECM is provided with a backup module and the backup module does not receive feedback information generated by the VCU based on the start request information within the preset time, a self-checking command is separately sent to a transmission control unit (TCU), a battery management system (BMS) and an auxiliary motor controller; and the backup module determines that the hybrid electric vehicle meets start conditions according to the received self-checking result information fed back by the TCU, the BMS and the auxiliary motor controller and send a start command tocontrol the start of the hybrid electric vehicle when detecting and learning that the ECM and the ENG match a code successfully. Thus, when the VCU fails, the whole vehicle can still be driven, the hybrid electric vehicle is controlled to safely limp to a target location, and the safety of the whole vehicle is ensured.

Description

technical field [0001] The invention relates to the technical field of vehicle control, in particular to a vehicle control method and a power system of a hybrid vehicle. Background technique [0002] Usually, the whole vehicle controller in the hybrid electric vehicle is the core component of the whole vehicle control system of the hybrid electric vehicle. By collecting various signals and making corresponding judgments, the controllers of each component 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 generator is turned off and the bus high-voltage system is cut off to prohibit the vehicle from being powered on, so that the vehicle cannot run. However, in the above method, when the controller of the whole vehicle fails, the vehicle can only stop in place and wait for rescue, and the safety is low. Contents...

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.

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