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Control method of finished series hybrid power electric vehicle based on fuzzy logic

A hybrid and electric vehicle technology, applied in hybrid vehicles, motor vehicles, transportation and packaging, etc., can solve the problems of poor economy, power following control strategy and poor vehicle emissions, so as to prolong life and reduce working hours , avoid the effect of deep discharge and saturation charge

Inactive Publication Date: 2010-05-19
JILIN UNIV
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Problems solved by technology

[0004] In order to overcome the problems existing in the two control strategies of the existing serial hybrid electric vehicles, namely, the energy efficiency of the constant temperature control strategy is poor for the whole vehicle, and the power following control strategy is poor for the whole vehicle emission. The present invention is a fuzzy logic-based Vehicle control method for series hybrid electric vehicles

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  • Control method of finished series hybrid power electric vehicle based on fuzzy logic
  • Control method of finished series hybrid power electric vehicle based on fuzzy logic

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Embodiment Construction

[0016] figure 1 It shows that a hybrid electric vehicle is mainly composed of an engine 2, a generator 3, a drive motor 5 and a power battery 4, which are connected in series. The required power of the engine 2 (or the required power of the drive motor 5), since the working area of ​​the engine 2 has different optimization areas, three relatively optimized points are selected on the universal characteristics of the engine 2 (according to the different requirements of the vehicle and the engine 2 performance is different, the number of selected fuel and emission optimization points and the specific location are different), and then according to the combination of control variables, the engine 2 is controlled to work at the set optimization point.

[0017] The power battery 4SOC value is divided into seven points from 20% to 80%, and the required power (Pm) of the drive motor 5 is also divided into seven points (set as NB, NM, NS, Z, PS, PM, PB, respectively Corresponding to ne...

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Abstract

The invention relates to a control method of a finished series hybrid power electric vehicle based on fuzzy logic, belonging to the technical field of control of hybrid power electric vehicles. A required working state of a drive motor is divided into seven areas according to an expert control principle, engineer experience, vehicle working area characteristics and the working characteristics of the drive motor; a working state of a power battery is divided into seven areas according to the characteristics of the power battery; an output state of an engine is divided into three to five fuel economy and low discharge points according to the working performance of the engine; the fuel economy and low discharge points of the engine are output by adopting a fuzzy logic algorithm and adopting the charge state of the power battery and the required powder of the drive motor as input variables according to the change of the input variables, and the engine, the power battery and the drive motor are operated in an efficient area. The invention can reduce the working participation time of the battery and an energy drive chain, improve the energy-saving effect of the finished vehicle, the economy and the discharge performance of the engine and prolong the service lives of the finished vehicle and all components.

Description

technical field [0001] The invention belongs to the technical field of control methods for hybrid electric vehicles, and in particular relates to a control method for a series hybrid electric vehicle. Background technique [0002] The current energy management methods for series hybrid electric vehicles are divided into two types: constant temperature energy management methods and power following energy management methods. For the constant temperature energy management method, the engine control unit (ECU) controls the engine to work at a constant operating point (the transient working time is ignored), and the engine drives the generator to provide energy for the power battery. When the state of charge (SOC) of the power battery is lower than a certain limit value (generally about 20%), the engine is turned on to supplement the power battery. When the charge of the power battery is higher than a certain limit value (generally not higher than 80%), the engine is turned off....

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Application Information

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IPC IPC(8): B60W20/00B60W10/06B60W10/08B60W10/26B60W20/10
CPCY02T10/6286Y02T10/62
Inventor 于秀敏丁华杰李俊杰孙平王云开梁金广董伟何玲刘乐宫长明李国良李军
Owner JILIN UNIV
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