Throttle Valve Position Control Pressure Regulator

This device consists of a cam mounted on throttle shaft and acting on a spring loaded diaphragm. When throttle is at idle position, diaphragm keeps both inlet and outlet sufficiently open to maintain minimum pressure on plunger of 3.0 ±.05 bar. At mid-range throttle opening, control pressure is increased to 3.7 ±.2 bar to lean out mixture as necessary. As throttle is fully opened, pressure is again decreased to 2.9 ±.2 bar, thus slightly enriching mixture.