Computing method and device for optimal slip ratio and automobile
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: 2019-02-26
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 computing method and device for the optimal slip ratio and an automobile. The computing method includes the following steps that road adhesion coefficients of the current driving road surface of the automobile are obtained; according to the road adhesion coefficients of the current driving road surface, the slip ratios of automobile wheels are determined; after an anti-lock braking system (ABS) of the automobile is triggered, wheel cylinder pressure before brake wheel cylinders of the automobile are decompressed is obtained, and whether slip trends of the automobile wheels appear or not is judged; if the slip trends of the automobile wheels do not appear, the slip ratios are corrected according to the wheel cylinder pressure to obtain the optimal slip ratio of theautomobile wheels. By means of the computing method and device for the optimal slip ratio and the automobile, the automobile-wheel slip ratios corresponding to the road adhesion coefficients of the current driving road surface can be determined, and then are corrected through the wheel cylinder pressure before the brake wheel cylinders are decompressed, the problem that as the measured data result is directly called in the prior art, the slip ratio has deviations is solved, the requirement of a current driver can be met through the automobile, and user experiences are improved.
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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Login to View More 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