Energy recovery control method and device
A technology of energy recovery and control method, applied in the field of energy recovery control, which can solve the problems of not considering the impact of different working conditions on braking control, large changes in braking deceleration, affecting energy recovery rate and driving comfort, etc.
Active Publication Date: 2021-04-09
WEICHAI POWER CO LTD
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Problems solved by technology
[0003] In the existing technology, the calibrated energy recovery control strategy is usually used for braking control, and the influence of different working conditions on braking control is not considered
However, when the vehicle weight and road resistance change greatly, or the potential energy changes greatly during the downhill process, still using the calibrated braking energy recovery strategy will cause a large change in braking deceleration, which will affect the energy recovery rate and driving comfort.
Method used
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[0054] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0055] refer to figure 1 , which shows a schematic flowchart of an energy recovery control method provided by an embodiment of the present invention. In this embodiment, the method includes:
[0056] S101: When it is detected that the vehicle is in a sliding or braking state, detect whether the vehicle is driving on a sloped road;
[0057] S102: If it is detected that the vehicle is driving on a road with a slope, obtain slope information;
[0058] In this e...
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The invention discloses an energy recovery control method which comprises the following steps: when a vehicle runs downhill, determining a gradient adjustment coefficient according to gradient information, determining a brake recovery adjustment coefficient according to vehicle weight and road resistance, and when the vehicle is in a sliding state, adjusting a sliding recovery curve based on the gradient adjustment coefficient and the brake recovery adjustment coefficient. Determining a sliding recovery torque according to the current vehicle speed and the adjusted sliding recovery curve; and when the vehicle is in a braking state, adjusting the braking recovery map according to the gradient adjustment coefficient and the braking recovery adjustment coefficient, and determining the braking recovery torque according to the current vehicle speed, the current braking pedal opening degree and the adjusted braking recovery map. Therefore, the energy recovery control strategy is adjusted along with the change of the vehicle weight, the road resistance and the gradient, so that the braking effect more suitable for the current working condition is achieved, the comfort of the braking process is guaranteed, and the requirement for energy recovery economy is met.
Description
technical field [0001] The invention relates to the field of energy recovery control, in particular to an energy recovery control method and device. Background technique [0002] During the actual operation of the vehicle, the working conditions will continue to change, especially for heavy-duty vehicles. During the operation, the vehicle weight and road resistance vary widely, and the potential energy of heavy-duty vehicles is relatively large during the downhill process. [0003] In the prior art, a calibrated energy recovery control strategy is usually used for braking control, without considering the influence of different working conditions on the braking control. However, when the vehicle weight and road resistance change greatly, or the potential energy changes greatly during the downhill process, still using the calibrated braking energy recovery strategy will cause a large change in braking deceleration, which will affect the energy recovery rate and driving comfort...
Claims
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Patent Timeline
Login to View More IPC IPC(8): B60W10/18B60W40/076B60W40/06B60W40/105B60W40/13
CPCB60W10/18B60W40/076B60W40/06B60W40/105B60W40/13
Inventor 马明霞桂经良李宁沈兆树王朝辉
Owner WEICHAI POWER CO LTD