Method for calculating limit capability of vehicle crossing steps

The invention relates to the technical field of vehicle design, in particular to a step crossing limit capability calculation method for a vehicle. The step crossing limit capability calculation method of the vehicle comprises the following steps: S1, obtaining parameters of the whole vehicle; s2, static balance equations of all vehicle types under different working conditions are listed, the vehicle types comprise a front-wheel-drive vehicle type and a rear-wheel-drive vehicle type, and the working conditions comprise the two conditions that the front wheels cross the steps and the rear wheels cross the steps when the vehicle is in a forward gear and further comprise the two conditions that the front wheels cross the steps and the rear wheels cross the steps when the vehicle is in a reverse gear; s3, listing a geometric equation of each vehicle type under the current working condition; and S4, substituting the maximum torque value of the engine into each static balance equation to obtain the step crossing ca