초록 ▼

A process is proposed for determining the characteristics of a motor vehicle's built-in shock absorbers. The vehicle is driven onto a ramp support which is then quickly removed, causing the vehicle to drop onto a base whose distance below the ramp support corresponds to the residual rebound clearanc

A process is proposed for determining the characteristics of a motor vehicle's built-in shock absorbers. The vehicle is driven onto a ramp support which is then quickly removed, causing the vehicle to drop onto a base whose distance below the ramp support corresponds to the residual rebound clearance associated with the particular vehicle design; the changes in the so-called wheel contact force when the car hits the base are measured. The process is characterized by the fact that the vibration characteristics of the body and one wheel at a time are measured, the measurement results, together with the measured values of wheel contact force, are fed into the known differential equations governing damped oscillations, and the characteristic data for the vehicle structure, namely, the body- and wheel masses, spring stiffness and damping constants, are calculated.

대표청구항 ▼

[ The claims defining the invention are as follows:] [1.] A process for determining a response to a force shock-absorbers installed in a motor vehicle, comprising:(a) positioning the motor vehicle on a support surface of a ramp,(b) removing suddenly the support surface so that the motor vehicle drop

[ The claims defining the invention are as follows:] [1.] A process for determining a response to a force shock-absorbers installed in a motor vehicle, comprising:(a) positioning the motor vehicle on a support surface of a ramp,(b) removing suddenly the support surface so that the motor vehicle drops a predetermined distance from the support surface onto a base, said predetermined distance corresponding to a predetermined residual rebound clearance defined by the vehicle's design specifications,(c) measuring wheel contact forces exerted on the base as a function of time when the wheels of the motor vehicle hit the base,(d) measuring at least one of a displacement, a velocity, and an acceleration of the vehicle body and of at least one wheel as a function of time, andcomputing using results of said measuring steps (c) and (d) values for at least one of a vehicle body mass, a wheel and wheel axle mass, a vehicle spring-stiffness, a tire spring constant, a tire damping constant, and a shock absorber damping constant.