VIBRATION-PROTECTIVE PROPERTIES OF THE SUSPENSION WITH STEPWISE REGULATION OF INELASTIC RESISTANCE IN THE VIBRATION CYCLE

Abstract

A car suspension is a set of mechanisms. It creates an elastic connection between the undercarriage and the wheels of a motor vehicle. It adjusts the position of the body while the car is moving. The car suspension also reduces the dynamic loads on the motor vehicle undercarriage and wheels. Dynamic loads are the cause of body vibrations. They are formed when the car wheels meet into contact with the road surface. The dynamics of the motor vehicle movement largely depends on the vibration-protective properties of the body suspension. It is the most important parameters of the motor vehicle suspension when driving on uneven roads. Vibration-protective properties have a significant impact on the operational properties of the motor vehicle. These include smoothness, average speed, fuel efficiency, etc. To improve the vibration-protective properties of the car suspension, its elastic and damping characteristics should change depending on different conditions of the motor vehicle implementation. The article investigates the vibration-protective properties of the suspension with stepwise regulation of inelastic resistance in the vibration cycle. The article presents a mathematical model of a single-mass single-support oscillatory system with an adjustable damper. A theoretical comparative analysis of vibration-protective properties of a single-mass single-support suspension with unregulated and instantly adjustable damping in the oscillation cycle is carried out. It was found that, in comparison with unregulated damping, its instantaneous regulation in the oscillation cycle provides a low level and approximate constancy of the vertical acceleration range of the sprung mass in the resonant oscillation zone, but causes an abrupt change in acceleration at the moments when the damping is turned off when the suspension passes its middle position.