Driving comfort for riders and passengers is a key
target to be achieved. Fluctuations in vehicle loads, bumps,
perforated surfaces, and other road damage will greatly affect
the vehicle suspension working system. This study aims to
calculate the vertical dynamic load of the vehicle actually which
occurs on road construction after through the vehicle wheel
suspension mechanism. The Pneumatic cylinder that was driven
by pressurized air directly weigh on the spring and Shock
Absorber that contained on the wheels of the vehicle. The load
fluctuations of the medium weight category vehicle are
determined by the regulation of the amount of pressurized air
entering into the pneumatic cylinder chamber pushing the piston
and connecting rods. The deviation that occurs during
compression on the Spring and Shock Absorber, is substituted
into the vehicle dynamic load equation by taking also the
magnitude of the spring stiffness constant, and the fluid or gas
coefficient of the damper. The results showed that the magnitude
of the displacement when the compression force worked has
significantly influenced the amount of vertical dynamic load of
the vehicle that overlies the road construction. Experimental
results using pneumatic actuators instead of real dynamic vehicle
loads illustrate the characteristics of the relationship between
work pressure and dynamic load. If the working pressure of P2
(bar) is given great, the vertical dynamic load Ft (N) which
overloads the structure of the road is also greater. From the
graph shows that shock absorbers have greater ability to reduce
dynamic load vertically when compared to spring ability.
Keywords— Dynamic load; Pneumatic Cylinder; Pressurized
air; Suspension; and Road