Starter control method and system for hybrid electric vehicle and hybrid electric vehicle

Abstract

The invention discloses a starter control method and system of a hybrid vehicle, and the hybrid vehicle. The method includes the following steps: acquiring the state parameters of the starter power supply circuit, and determining whether the starter power supply circuit fails according to the state parameters; The starting mode of the starter, the starting mode of the starter includes the driving starting mode and the parking starting mode; if the starter adopts the driving starting mode and the starting power supply circuit is not faulty, the starting switch is controlled to be disconnected, and the low-voltage load A power limit command is issued, and after the first preset time, the starter is controlled to start the engine; if the starter adopts the parking start mode and the starter power supply circuit is not faulty, the starter switch is controlled to remain closed, and the starter is controlled to start the engine. The starter control method provided by the embodiment of the present invention is beneficial to improve the voltage stability of the whole vehicle, prevent the starting voltage drop of the starter from affecting the low-voltage load operation, reduce the production cost, and improve the operation safety of the whole vehicle.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of hybrid vehicles, and in particular, to a method and system for controlling a starter of a hybrid vehicle, and a hybrid vehicle. Background technique [0002] In a hybrid vehicle, an engine and a drive motor are employed as driving sources so that the vehicle can travel in a pure electric mode or a hybrid mode. When the vehicle is running in pure electric mode, if the drive motor is abnormal or the vehicle speed is insufficient, the engine can be started while the vehicle is running, and the vehicle can be switched to the hybrid mode. [0003] In a hybrid vehicle, the starting of the engine is usually realized in two ways, one is to start the engine with a starter, and the other is to start the engine with a drive motor. However, the existing hybrid vehicle usually adopts a single-battery power supply system, which is powered by the battery for the starter and the low-voltage load. D...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a starter control method for a hybrid vehicle, which solves the problem of a reduction in the power supply voltage of a low-voltage load when the starter drives the engine, and is beneficial to improving voltage stability and improving the safety of vehicle operation

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