Calculation method, device and automobile of optimal slip ratio
A calculation method and a technology of a calculation device, applied in the direction of brakes, etc., can solve problems such as identification errors of the best slip ratio and the inability of the vehicle to meet the driver's needs, so as to achieve the effect of solving the deviation of the slip ratio and improving the user experience
Active Publication Date: 2021-02-23
BYD CO LTD
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[0003] However, for the above-mentioned patents, the basis for its realization is that the calculation of the slip rate and the calculation of the friction coefficient of the road surface are relatively accurate and a relatively complete standard optimal slip rate library unit needs to be established, because the optimal slip rate identification is based on multiple units , once there is a deviation in the calculation of a certain unit, the accumulation of errors may lead to the wrong identification of the optimal slip ratio, so that the vehicle cannot meet the current driver's needs
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[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0030] The calculation method, device and vehicle of the optimal slip ratio according to the embodiments of the present invention will be described below in conjunction with the accompanying drawings.
[0031] figure 1 is a flow chart of the method for calculating the optimum slip ratio according to an embodiment of the present invention.
[0032] like figure 1 As shown, the calculation method of the optimum slip ratio in the embodiment of the present invention comprises the following steps:
[0033] S1, obtaining the road sur...
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The invention discloses a calculation method, device and automobile for optimum slip ratio. The method comprises the following steps: obtaining the road surface adhesion coefficient of the current driving road surface of the automobile; determining the slippage of the vehicle wheel according to the road surface adhesion coefficient of the current driving road surface rate; after the anti-lock braking system ABS of the car is triggered, obtain the wheel cylinder pressure before the brake wheel cylinder of the car is released, and judge whether the car wheel has a tendency to slip; if the car wheel does not appear to slip trend, the slip ratio is corrected according to the wheel cylinder pressure to obtain the optimum slip ratio of the vehicle wheel. In the method of the embodiment of the present invention, after determining the slip rate of the vehicle wheel corresponding to the road surface adhesion coefficient of the current driving road surface, the slip rate can be corrected by the wheel cylinder pressure before the pressure release of the brake wheel cylinder, which solves the problem There is a problem of slip ratio deviation caused by directly calling the measured data results, so that the car can meet the needs of the current driver and improve the user experience.
Description
technical field [0001] The invention relates to the technical field of automobiles, in particular to a method for calculating an optimal slip ratio, a non-transitory computer-readable storage medium, a device for calculating an optimal slip ratio and an automobile. Background technique [0002] At present, the application number "201020283888.1" in the Chinese Utility Model Patent Application Publication is titled "A System for Identifying the Best Slip Rate of Electric Vehicles" and discloses an identification system for the best slip rate of electric vehicles. (Current slip rate calculation unit, current road surface friction coefficient calculation unit, standard optimal slip rate library unit, and optimal slip rate identification unit) are connected to calculate the current slip rate and road surface friction coefficient relationship curve, and compare Optimal slip ratio library for optimal slip ratio identification. [0003] However, for the above-mentioned patents, th...
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IPC IPC(8): B60T8/172B60T8/1761
CPCB60T8/172B60T8/1761B60T2210/10
Inventor 张宏洲于笃发汪虹郭海陈彦
Owner BYD CO LTD