Method and device for determining braking energy recovery value, and energy recovery system and method
A braking energy recovery and determination method technology, applied in the vehicle field, can solve problems such as low accuracy of braking energy recovery, poor control precision, and increased cost, and achieve the effect of improving the accuracy of energy recovery value and control precision
Active Publication Date: 2019-08-13
GUANGZHOU AUTOMOBILE GROUP CO LTD
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Problems solved by technology
[0004] In the traditional method of determining the braking energy recovery value through the output signal of the travel sensor installed at the brake pedal, due to the large assembly error of the travel sensor installed at the brake pedal, the braking energy recovery value will The accuracy is low and the control precision is poor. At the same time, additional travel sensors and related accessories are required, and the cost will increase.
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[0057] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and do not limit the protection scope of the present invention.
[0058] Such as figure 1 As shown, in one of the embodiments, a method for determining a braking energy recovery value is provided, and the method for determining a braking energy recovery value in this embodiment includes:
[0059] Step S101: Obtain the current pressure value of the brake fluid in the master cylinder and the current rotation speed value of the wheels when the whole vehicle is braked;
[0060] Wherein, the current pressure value of the master cylinder brake fluid can be obtained from the pressure signal of the master cylinder brake fluid detected by the ...
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The invention relates to a braking energy recovery value determining method and device and an energy recovery system and method. The braking energy recovery value determining method comprises the steps that during whole vehicle braking, the current pressure value of main cylinder braking liquid and the current rotating speed value of a wheel are acquired; a target braking energy recovery value is determined according to the current pressure value and the current rotating speed value. The braking energy recovery method comprises the steps that during whole vehicle braking, a main cylinder pressure sensor collects the current pressure value of the main cylinder braking liquid, and a wheel rotating speed sensor collects the current rotating speed value of the wheel; an ECU system determines the target brake energy recovery value according to the current pressure value and the current rotating speed value; a motor controller controls a motor according to the target braking energy value and generates power, and electric energy generated by power generation is converted into chemical energy to be stored in a battery. According to the scheme, a stroke sensor and relevant accessories do not need to be additionally arranged, and the accuracy of the energy recovery value is improved.
Description
technical field [0001] The invention relates to the technical field of vehicles, in particular to a method and device for determining a braking energy recovery value, and an energy recovery system and method. Background technique [0002] Braking energy recovery is one of the ways that electric vehicles can improve energy usage. It can convert the kinetic energy of the car when braking into the electric energy storage of the battery through the electric motor, and then use it in the traction drive, avoiding the loss of energy into frictional heat energy, thereby improving the efficiency of energy use and increasing the size of the electric vehicle. driving mileage. [0003] The estimation of the braking energy recovery value is a key point of the braking energy recovery. At present, most pure electric vehicles and hybrid vehicles use the output signal of the stroke sensor set at the brake pedal and the vehicle speed as the braking energy recovery value. That is to say, the...
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IPC IPC(8): B60L7/10
CPCB60L7/10
Inventor 顾敦位徐奇张锐王乔
Owner GUANGZHOU AUTOMOBILE GROUP CO LTD