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Synergistic Combination Optimization Method for Matching Parameters and Control Strategy of Hybrid Electric Vehicle

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, avoid tedious errors, and improve work efficiency. Effect

Active Publication Date: 2020-12-25
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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  • Synergistic Combination Optimization Method for Matching Parameters and Control Strategy of Hybrid Electric Vehicle

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Embodiment

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

[0025] Such as figure 1 As shown, a hybrid electric vehicle matching parameters and control strategy collaborative combination optimization method, including the following steps:

[0026] Establish a hybrid vehicle model: establish a P2 hybrid vehicle power system model, including the engine, motor, power battery, gearbox, final drive, differential, brake, tire model; establish a vehicle driving resistance model, including Rolling resistance, air resistance, gradient 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 strategies, EVCS strategies, and rule-based strategies based on fuzzy logic (FL). I...

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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 hybrid electric vehicle power transmission and control, in particular to a hybrid electric vehicle matching parameter and control strategy cooperative combination optimization method. Background technique [0002] Whether a hybrid electric vehicle can maximize energy-saving and emission-reduction effects depends on the parameters of each component of the vehicle power system and the control strategy. However, matching parameters and control strategies are mutually restricted and coupled, so generally only one of them is optimized separately. Design, can not maximize the potential of hybrid power, in addition, through manual parameter adjustment or programming optimization algorithm to optimize the design of the hybrid system, the workload is heavy and cumbersome, and the accuracy is difficult to guarantee. [0003] Chinese patent document CN 110210098 A discloses a method for matching transmission paramet...

Claims

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Application Information

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Patent Type & Authority Patents(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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