A failure limp control method and device for a hybrid electric vehicle

A hybrid vehicle, control method technology, applied in hybrid vehicles, motor vehicles, transportation and packaging, etc., can solve problems such as no solution or control method, increasing vehicle stoppage, etc.

Active Publication Date: 2018-09-11
CHINA FIRST AUTOMOBILE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The hybrid power system in the prior art is composed of multiple power sources, which increases the possibility of the vehicle stopping due to the failure of the power source. How to avoid failure of any power source, that is, the engine, the electric motor, and the high-voltage energy storage device , the whole vehicle can still limp safely and leave dangerous areas such as highways and crossroads. None of the above patents has a corresponding solution or control method.

Method used

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  • A failure limp control method and device for a hybrid electric vehicle
  • A failure limp control method and device for a hybrid electric vehicle
  • A failure limp control method and device for a hybrid electric vehicle

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Embodiment Construction

[0031] figure 1 Shown is a schematic diagram of a typical hybrid system structure. The hybrid power system is composed of two power sources, the first power source is the engine 1, and the second power source is the electric motor 3, wherein the separation clutch 2 can separate the engine 1 from the drive train to realize pure electric driving. When the separation clutch 2 is disengaged, the high-voltage energy storage device 5 provides electric energy to the motor 3 through the inverter 6, and the torque output by the motor 3 is transmitted to the wheels 7 through the transmission 4, thereby driving the vehicle. When the separation clutch 2 is engaged, the engine 1 and the electric motor 3 can simultaneously or independently output torque to drive the vehicle.

[0032] figure 2 Shown is a schematic diagram of the failure limp control device of the hybrid power system of the present invention. The separation clutch 2 is configured as a wet normally open clutch, and the clu...

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Abstract

The invention relates to a failure limping control method and device for a hydraulic power automobile. The hydraulic power automobile comprises an engine, a separating clutch, a motor, a speed transmission, a high-pressure energy storing device and a DC voltage converter assembly component. The failure limping control method comprises the following steps of grading severity grade of failures of assemblies; performing corresponding limping control based on the severity grades; when some assembly component is completely failed, judging whether the engine needs to be started or not and adopting a corresponding starting control method; and when the engine is limped, controlling the rotating speed of the engine to be in a reasonable range, so as to guarantee that the whole automobile safely limps.

Description

technical field [0001] The invention relates to a failure limp control method and device for a hybrid electric vehicle, belonging to the field of electric vehicle control. Background technique [0002] Hybrid vehicles can use different power sources as needed to obtain the best overall vehicle economy. It usually consists of two power sources, an engine and an electric motor. When the vehicle is driven, the driving force is provided by two power sources simultaneously or by one of the power sources alone. [0003] Same as traditional cars, when the key components of a hybrid car fail, such as the engine, electric motor, high-voltage energy storage device, etc., in order to allow the driver to drive the vehicle away from the dangerous area (such as an intersection or highway) as soon as possible, it is necessary to respond accordingly. The limp function ensures that the vehicle can be moved in an emergency. The main difference between hybrid electric vehicles and tradition...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W20/50B60W50/02
CPCB60W20/50B60W50/0205
Inventor 王光平赵子亮李想赖日飞周勇有
Owner CHINA FIRST AUTOMOBILE
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