System Components: Governor

Governor is an idle-maximum RPM control. See Figure. Springs are designed and adjusted so no regulating takes place in intermediate range except for compensation. Between idle and maximum RPM cutout, main rack is operated only by accelerator pedal. Pedal is connected, through linkage, with fulcrum lever of governor.

When engine RPM increases, flyweights move outward as soon as centrifugal force exceeds spring pressure. Movement of flyweights is transmitted through the angle lever, adjusting screws and control lever to main rack.

When reaching maximum RPM, main rack is moved toward the cutout position, reducing the amount of fuel and limiting engine RPM. As engine RPM decreases, the function is reversed.

Through governor action, engine RPM is held constant at idle speed, regardless of engine operating conditions - cold engine, air conditioner operation, power steering, or automatic transmission. At 5000-5100 RPM, governor limits RPM by pulling main rack back, until balance exists between engine RPM and fuel delivery.