Energy recovering method for parallel-type hybrid electric vehicle on basis of fuzzy control

A technology of hybrid electric vehicles and fuzzy control, applied in the direction of hybrid electric vehicles, control drives, motor vehicles, etc., can solve the problems of poor adaptability and robustness, poor real-time control of vehicle energy recovery, etc., and achieve good real-time and robustness sexual effect

Active Publication Date: 2017-10-20
CHONGQING UNIV
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Problems solved by technology

[0005] This method recovers energy from the traditional rule-based control method, which can

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  • Energy recovering method for parallel-type hybrid electric vehicle on basis of fuzzy control
  • Energy recovering method for parallel-type hybrid electric vehicle on basis of fuzzy control
  • Energy recovering method for parallel-type hybrid electric vehicle on basis of fuzzy control

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Embodiment Construction

[0025] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0026] The present invention comprises the following steps:

[0027] Step 1. Determine the brake demand torque T of the car 0 ;

[0028] According to Tsinghua University’s master’s thesis “Simulation of Braking Energy Recovery Control Strategy for Mild Hybrid Electric Vehicles”, Li Peng recorded the relationship between brake plate opening and braking deceleration in 2005, as figure 1 As shown, the brake pad opening refers to the ratio of the brake pad offset to the brake pad full-open offset. The braking deceleration of the vehicle can be determined according to the driver's braking intention, that is, the opening of the brake plate. According to the book "Vehicle Energy Management: Modeling, Control and Optimization", Zhang Xi, Mi Chunting, pages 73-82, then Calculation of braking demand torque T 0 .

[0029] Step 2. Determine the braking torque distri...

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Abstract

The invention discloses an energy recovering method for a parallel-type hybrid electric vehicle on the basis of fuzzy control. The problems that an existing control method is poor in adaptability, robustness and real-time control over vehicle energy recovering are solved. The method comprises the steps that 1, the demanded braking torque T0 of the vehicle is determined; 2, through inference of fuzzy control, the allocation proportion factor q of the braking torque is determined, and the regeneration braking torque T1 and the mechanical braking torque T2 are obtained; and 3, the braking torque is selected, specifically, 1) when the opening degree of a braking pedal is larger than the threshold value of the opening degree of the braking pedal, T0 is the sum of T1 and T2; and 2), when the opening degree of the braking pedal is smaller than or equal to the threshold value of the opening degree of the braking pedal, (1) when SOC is larger than the threshold value of SOC, T0 is equal to T2, (2) when SOC is smaller than or equal to the threshold value of SOC, T0 is equal to T1, or Ti is equal to T1max, and T0 is equal to the sum of T1 and T2, and (3) when the opening degree of the braking pedal is 0, T0, T1 and T2 are each equal to 0.

Description

technical field [0001] The invention belongs to the field of hybrid electric vehicles, and in particular relates to an energy recovery method for a hybrid electric vehicle in a parallel mode. Background technique [0002] With the development of society, problems such as energy shortage and environmental pollution are becoming more and more serious. However, the internal combustion engines of traditional fuel vehicles are inefficient and large in number, resulting in energy waste and serious exhaust pollution. In order to reduce environmental pollution and energy consumption, there are currently two main solutions: one is to improve engine efficiency, and the other is to use new energy instead of fossil fuels. Hybrid vehicles, fuel cell vehicles, and pure electric vehicles are new energy vehicles. Hybrid vehicles are the main direction of research, and the technology is relatively mature. The energy recovery of hybrid vehicles is an integral part of hybrid vehicle technology...

Claims

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Application Information

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IPC IPC(8): B60L7/10B60L15/20B60W20/14B60W10/08B60W10/26
CPCB60L7/10B60L15/2009B60L2240/423B60W10/08B60W10/26B60W20/14B60W2510/244B60W2520/10B60W2710/083Y02T10/62Y02T10/72
Inventor 徐奇伟罗骁枭宿一鸣陈伟东孙静
Owner CHONGQING UNIV
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