A braking control method based on hybrid electric vehicle braking energy recovery
A braking energy recovery, hybrid vehicle technology, applied in brake control systems, electric vehicles, electric braking systems, etc., can solve the problems of short friction plate replacement cycle and insufficient battery life
Inactive Publication Date: 2018-10-09
JIANGSU UNIV
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Problems solved by technology
It can solve the problems of insufficient battery life of hybrid vehicles and the short replacement period of friction linings caused by heavy braking of mechanical friction linings. resulting discomfort
Method used
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Embodiment Construction
[0041] The present invention will be further described below in conjunction with accompanying drawing.
[0042] Such as figure 1 As shown, the braking control strategy of the present invention is as follows:
[0043] 1. When the driver issues a braking request:
[0044] (1) Receive the braking request and predict the driver's braking request signal and enter the next process;
[0045] (2) Judging whether the battery SOC can meet the requirements of current recovery, if the battery SOC value > the minimum SOC value, enter the next process;
[0046] (3) Determine whether the ISG motor can receive the transmitted torque; if T 电机 ≤T 电机max , enter the next process;
[0047] (4) Judging the master cylinder pressure transmitted by the master cylinder pressure sensor, if P 主缸 ≥P 阈值 , enter the next process;
[0048] (5) Judging the braking strength and the real-time vehicle speed.
[0049] 2. When the above braking energy recovery conditions are met, select the following cont...
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The invention discloses a brake control method based on brake energy recovery of a hybrid electric vehicle. The brake control method comprises the steps that S1, when a driver sends out a brake request, whether the brake energy recovery conditions are met or not is judged, specifically, (1) whether a battery SOC can meet the requirements for current recovery or not is judged, and if the requirements are met, the step (2) is executed; (2) whether an ISG can receive transmitted torque or not is judged, and the step (3) is executed if the ISG can receive the transmitted torque; (3) the main cylinder pressure transmitted by a main cylinder pressure sensor is judged, and if the main cylinder pressure P is greater than or equal to a pressure threshold value, then the step (4) is executed; and (4) the brake strength and vehicle speed are judged; and S2, when the brake energy recovery conditions are met, control strategies are selected according to the brake strength z; when z is greater than or equal to 0 but smaller than or equal to 0.1, hydraulic brake is adopted; when z is greater than or equal to 0.1 but smaller than or equal to 0.3, and it is confirmed that the electric brake force can be provided, the small-strength control strategy is adopted; when z is greater than or equal to 0.3 but smaller than or equal to 0.65, and it is confirmed that the electric brake force can be provided, the high-strength control strategy is adopted; and when z is greater than or equal to 0.65, hydraulic brake is adopted. According to the brake control method based on the brake energy recovery of the hybrid electric vehicle, the safety and the economical efficiency of the hybrid electric vehicle can be improved.
Description
technical field [0001] The invention belongs to the application field of automotive electronics, and designs a control method based on energy recovery of a hybrid electric vehicle. Background technique [0002] As a transitional product between traditional vehicles and electric vehicles, hybrid vehicles have received extensive attention and in-depth research in recent years, and are favored by consumers. However, in densely populated cities, cars often need to slow down or stop, and frequent braking results in a reduction in the service life of the brakes, making the driving safety of the car unguaranteed. The unique ISG motor on the hybrid electric vehicle can recover part of the energy of the hybrid electric vehicle during braking, thus improving the safety of the vehicle to a certain extent. Braking energy recovery, also known as braking regeneration, refers to the conversion of kinetic energy stored on the body of the vehicle into electrical energy through the motor dur...
Claims
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IPC IPC(8): B60L7/26B60W30/18B60W10/06B60W10/188
CPCB60L7/26B60T2270/604B60W10/06B60W10/188B60W30/18127B60W2510/083B60W2510/182B60W2510/244B60W2710/083B60W2710/182
Inventor 王权王子腾车帅刘航任乃飞
Owner JIANGSU UNIV