Hybrid electric vehicle matching parameter and control strategy synergistic combination optimization method

A hybrid vehicle and control strategy technology, applied in hybrid vehicles, motor vehicles, control devices, etc., can solve problems such as optimizing vehicle performance that cannot be maximized, shorten optimization cycles, improve work efficiency, and avoid tedious and error-prone problems. Effect

Active Publication Date: 2020-01-10
清华大学苏州汽车研究院(吴江)
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Problems solved by technology

This method only matches and optimizes the transmission parameters of the car, and cannot maximize the optimization of vehicle performance.

Method used

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  • Hybrid electric vehicle matching parameter and control strategy synergistic combination optimization method

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Embodiment

[0024] The preferred embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0025] like figure 1 As shown in the figure, a method for synergistic combination optimization of matching parameters and control strategies of a hybrid electric vehicle includes the following steps:

[0026] Build a hybrid vehicle model: build a P2 hybrid vehicle power system model, including engine, motor, power battery, gearbox, final gear, differential, brakes, and tire models; build a vehicle driving resistance model, including Rolling resistance, air resistance, slope resistance, acceleration resistance.

[0027] Establish a hybrid vehicle control strategy: establish a rule-based control strategy to limit the engine working area through motor torque compensation, thereby improving the fuel economy of the vehicle. Rule-based control strategies include CD-CS strategy, EVCS strategy, and rule-based strategy based on fuzzy logic (FL). Th...

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Abstract

The invention discloses a hybrid electric vehicle matching parameter and control strategy synergistic combination optimization method which comprises the steps of building a hybrid electric vehicle system model and a vehicle driving resistance model; building a hybrid electric vehicle control strategy; setting a gearbox transmission ratio as a matching parameter to be optimized, and adopting the engine torque top and bottom limitation, the battery SOC during engine intervention and the engine starting rotary speed as control strategy parameters to be optimized; integrating the vehicle model, acontrol strategy model and a combination optimization algorithm, running the built hybrid electric vehicle model and the built control strategy, and simulating-calculating the acceleration time, theclimbing degree, the oil consumption and the power consumption of the vehicle; and building the combination optimization algorithm, adopting 100-kilometer comprehensive energy consumption as a targetfunction value, setting a constraint condition, and operating the combination optimization algorithm to obtain the matching parameter to be optimized and a control strategy parameter optimal value. According to the hybrid electric vehicle matching parameter and control strategy synergistic combination optimization method provided by the invention, the matching parameter and the control strategy can be synergistically and automatically optimized at the same time, so that the vehicle and control strategy optimization cycle is greatly shortened, and the working efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of power transmission and control of hybrid electric vehicles, in particular to a method for synergistic combination optimization of matching parameters and control strategies of hybrid electric vehicles. Background technique [0002] Whether a hybrid vehicle can maximize the effect of energy saving and emission reduction depends on the parameters of each component of the vehicle's power system and the control strategy. However, the matching parameters and control strategies restrict and couple each other, so generally only one of them is optimized separately. In addition, the optimal design of the hybrid system by manually adjusting parameters or writing optimization algorithms is heavy and cumbersome, and the accuracy is difficult to guarantee. [0003] Chinese patent document CN 110210098 A discloses a method for matching transmission parameters of an extended-range four-wheel-drive hybrid electric vehicl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W20/15B60W50/00B60W40/10
CPCB60W40/10B60W50/00B60W2050/0034B60W2510/0638B60W2510/0657B60W2510/1005B60W2510/244B60W2520/10B60W20/15
Inventor 高小杰朱江
Owner 清华大学苏州汽车研究院(吴江)
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