Throttle Valve

As the throttle valve is linked with the accelerator pedal by wire, it produces the throttle pressure corresponding to the extent to which the accelerator pedal is depressed which is, in other words, the engine output. When the accelerator pedal is depressed, the throttle cam pushes the shift plug which then compresses two springs to move the throttle valve. Thus the line pressure passage is opened and the throttle pressure is produced. The throttle pressure is also applied to the back of the throttle valve to push back the valve. The throttle pressure is determined by the tensile force of the springs (position of the shift plug) and applied to the primary and secondary regulator valves to regulate the line pressure.