Throttle linkage system in an automobile provided with an internal combustion engine

An apparatus for transmitting movement of the accelerator pedal of an automobile to the throttle valve arranged in an intake system of an internal combustion engine of the automobile, said apparatus comprising:

• linkage means connecting the accelerator pedal with the throttle valve for transmitting movement of the accelerator pedal to the throttle valve, which movement turns the throttle valve;
• spring means co-operating with the linkage means for urging the accelerator pedal to move toward a position wherein the throttle valve is in its idle position;
• a damper comprising a cylinder and a piston member arranged in the cylinder, said piston member comprising a piston made of a rubber material and having at least one annular deformable lip portion slidably contacting the inner surface of the cylinder, a piston holder fitted on one end to the piston, and a piston rod connected to the other end of the piston holder, the piston rod being connected to the linkage means, a vacuum pressure chamber formed in said cylinder at the end of the piston opposite said piston holder and means for connecting said chamber to a vacuum source for urging said piston into a position for closing said throttle valve.