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Dvojčinný hydraulický tlumič v závěsu kola vozidla
Authors: Koreisová Gabriela | Koreis Josef
Year: 2006
Type of publication: článek ve sborníku
Name of source: The 19th International Conference on Hydraulics and Pneumatics
Publisher name: Česká strojnícka společnost
Place: Ostrava
Page from-to: 142-150
Titles:
Language Name Abstract Keywords
cze Dvojčinný hydraulický tlumič v závěsu kola vozidla Hydraulický tlumič a vinutá mechanická pružina tvoří pružící jednotku závěsu kola vozidla. Pneumatika kola bude modelována jako jednoduchá pneumatická pružina, s jednorozměrnou radiální deformací. Cílem příspěvku je ukázat vliv vlastností hydraulického tlumiče a pneumatiky s progresivní charakteristikou, na dynamiku závěsu kola. Hydraulický tlumič;závěsu kola vozidla;jednorozměrnou radiální deformací
eng Double-acting hydraulic damper in a car wheel suspension. The paper investigates the time course of the vibrations of the wheel and the vehicle body during crossing a wedge-shaped obstacle. The tyre is modelled as a pneumatic spring with nonlinear characteristics and non-zero coefficient of damping. The system contains a double-acting hydraulic shock absorber. The wheel suspension in a vehicle consists of two levers forming a parallelogram, a spiral spring, double-acting hydraulic shock absorber, and a wheel with a tyre. The response for a single-acting and double-acting hydraulic absorber is compared, and the influence studied of the vehicle velocity on the time course of vibrations of the car body above the wheel. The hydraulic damper exerts a damping force, which has two components. The first component is due to viscous friction of a piston in the cylinder. It is directly proportional to the piston velocity, but is independent of the direction of the movement. The second component is caused by the damping valves in the piston. These valves are single-acting. Inside the damping valve there is an orifice, causing a pressure difference, which is used for damping. This pressure difference is proportional to the square of the flow rate. The damping force caused by the orifice is proportional to the square of piston velocity, and depends on the direction of its movement. If the piston rod moves into the damper, the damping force is bigger, and when it moves out, it is smaller. Car wheel suspension, double acting hydraulic damper , mechanical spring, tyre deformation, pneumatic spring, linear damping, quadratic damping, wedge-shaped, ramp function, body vibrations,

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