Range extender shutdown control method and system for range extender electric vehicle

Abstract

The invention discloses a range extender stop control method and system for a range extending type electric vehicle. The range extending type electric vehicle comprises a VCU (Vehicle Control Unit), an EMS (Engine Management System), a GCU (Generator Control Unit), an APU (Auxiliary Power Unit), a generator, an engine and the like. The method includes the following steps that the current working condition of a range extender is acquired through the APU; the APU judges whether the highest fault level of faults fed back through the VCU, the EMS and the GCU is lower than the fault level at which the range extender is allowed to be operated or not; and if the highest fault level is lower than the fault level at which the range extender is allowed to be operated, the APU controls the range extender according to the current working condition. By the adoption of the method, the service life of a part system can be prolonged and the driving experience can be improved while the vehicle safety is guaranteed.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a method and system for controlling stoppage of a range extender of a range-extended electric vehicle. Background technique [0002] The shutdown of the generator set can be divided into normal shutdown and fault shutdown. The shutdown control function of the general generator set is to control the shutdown and unloading of the generator set at an appropriate time. Shutdown control is not a point-to-point control, that is, there is no judgment based on specific working conditions before further shutdown control processing, nor does it elaborate on the specific unloading process and determine whether there is a situation where the engine cannot be shut down based on its own operating status, especially the range extender. shutdown control. Contents of the invention [0003] The object of the present invention is to solve one of the above-mentioned technical problems at leas...

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Problems solved by technology

[0002] The shutdown of the generator set can be divided into normal shutdown and fault shutdown. The shutdown control function of the general generator set is to control the shutdown and unloading of the generator set at an appropriate time. Shutdown control is not a point-to-point control, that is, there is no judgment based on specific working conditions before further shutdown control processing, nor does it elaborate on the specific unloading process and determine whether there is a situation where the engine cannot be shut down based on its own operating status, especially the range extender. downtime control

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