A method for controlling the cooling system of a hybrid electric vehicle

A technology for cooling system control and hybrid electric vehicles, which is applied in hybrid electric vehicles, motor vehicles, transportation and packaging, etc., and can solve problems such as accelerated component wear, reduced engine efficiency, and emission of pollutants
CN106274889BInactive Publication Date: 2018-08-17ζ›Ήη‡•ε‡Œ
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
ζ›Ήη‡•ε‡Œ
Publication Date
2018-08-17
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention provides a method for controlling a cooling system of a hybrid electric vehicle. The method comprises the following steps that the practical igbt temperature value, the practical motor temperature value, the practical engine temperature value and the practical flow value are obtained; igbt cooling need flow flowl* is calculated; motor cooling need flow flow2* is calculated; engine cooling need flow flow3* is calculated; if temp_fault is 1, temperature sensor fault cooling need flow flow4*is set to be equal to N1; flow1*, flow2*, flow3* an flow4* are compared, and the maximum value is stored as flow*; whether flow_falut is 1 or not is judged, if yes, the duty ratio pwm1 is output through PI1; the water pump pwmp is driven to achieve the cooling effect through the duty ratio pwm obtained in the step S10. The running flow of a cooling water pump can be guaranteed to the maximum extent under the condition of minimum water consumption to cool a motor.
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Description

technical field

[0001] The invention relates to the technical field of new energy vehicles, in particular to a control method for a cooling system of a hybrid vehicle. Background technique

[0002] Hybrid vehicle cooling system, a system used to prevent overheating of the engine, electric motor, and their controllers Although gasoline engines have undergone numerous improvements, the efficiency of gasoline engines in converting chemical energy into mechanical energy remains not tall. Most of the energy in gasoline (about 70%) is converted into heat, and it is the task of the car's cooling system to dissipate this heat. In fact, a car driving on the highway can lose enough heat from its cooling system to heat two average houses! The main job of the cooling system is to dissipate heat into the air to keep the engine from overheating, but the cooling system has other important roles as well. Engines in cars run best at moderately high temperatures. If the engine gets too ho...

Claims

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