Analysis of energy dissipation of shock-absorber during random excitation

Abstract

This paper presents the investigation of energy dissipation in a car suspension. To start some research of damping energy’s recuperation is important to calculate the quantity of looses. Developed model has been applied us-ing linear and nonlinear suspension characteristics. Results of both calculations has been compared and gotten results show that till driving speed 30 km/h the difference is very little. When speed is over 30 km/h – nonlinear characteris-tics has to be applied.The quantity of dissipated energy is around 0.06…0.1 kWh. This quantity is quite important regarding full power of a small city’s type hybrid which is around 10 kW (1.5 kW electric motor and 8.5 kW internal com-bustion engine). When car has only electric motor, the same torque can be produced by ~ 3 kW electric motor and it means that dissipated energy can be around 3% of total produced power.