Working Of Telescopic Shock Absorber (Automobile) - SKengineers

 

TELESCOPIC SHOCK ABSORBER

Ø  FUNCTION OF SPRING –

                                                                                                                                        ·        The main function of spring is to cushion the vehicle and passengers from road shock. Spring stores and absorbs the energy and releases it when it comes back to its original state.

Ø  FUNCTION OF SHOCK ABSORBER –

·        Function of shock absorber is to control the quick bouncing of the wheels on load for stability and to control the slow bouncing of the body on suspension springs for comfort of the passengers.

Ø  SHOCK ABSORBER : CONSTRUCTION & WORKING –

1.      Shock absorber is a device, which damps out vibrations and shocks by offering resistance to the motion.

2.      In shock absorber, energy absorbed depends on viscosity of fluid and it converts shock and vibrations into heat, which are absorbed by the fluid. The resistance provided by shock absorber is proportional to the square of motion of flow through orifice.

3.      Shock absorber consists of chassis eye, which is fixed to chassis and axle eye, which is fixed to axle, which is moving up and down with road irregularities.

4.      The chassis eye is provided with protective covering in which fixed piston rod and piston is provided. In cylinder having axle eye, one more cylinder is provided, which forms two chambers namely reservoir and inner cylinder chamber. The piston slides in inner cylinder chamber. The piston is provided with valves as;

a)      Outer ring of holes, which passes fluid from bottom part of piston to top part of piston.

b)     Inner ring of holes, which passes fluid from bottom part of piston to top part of piston.

5.      The inner cylinder on its lower portion is fitted with foot valve, which is fixed to inner chamber of cylinder. The foot valve is provided with inner and outer ring of holes. The reservoir is half filled and inner cylinder is completely filled.

6.      When axle eye is moved in upward direction, fluid must displace from bottom part of piston to top part of piston through the outer ring of holes. In this condition, when the upper portion of the cylinder is filled fully or has less space, then the fluid will also be displaced through the inner ring of holes of the foot valve and the level of fluid in the reservoir will rise.

7.      Similarly, when axle eye is moved downward, then fluid will be displaced from top side to the bottom side of piston. Under this condition, the fluid will pass through the inner ring of holes. The vacuum left by the piston rod inside the inner cylinder during this movement is filled by the fluid displacing from the reservoir to the inner cylinder by opening outer ring of holes of the foot valve.