Function modeling and simulation of outer characteristic of telescopic shock absorber for automobile

The pathway throttle and local throttle loss of oil fluxion of telescopic shock absorber were analyzed, the curves of pathway loss coefficient and equivalent length of piston hole vs. shock absorber velocity were shown. According to the thickness and the pre-deformation of throttle slice, and the throttle hole area, the velocity points of valve opening were analyzed and the analytic formulas of shock absorber velocity when valve opening were given. On the basis of the velocity points, the outer characteristic model of shock absorber was established by piecewise linear math function. A practical example of simulation of shock absorber outer characteristic was given, and the performance test was conducted. The result shows that the model of outer characteristic simulation is correct; the simulation values are coincide with test values.