Abstract: In a fuel injection pump for use in an internal combustion engine, an injection timing control system actuatable in response to a pressure varying in dependence on engine r.p.m., which is designed to convert acceleration of a fuel injection quantity setting movable operating member into an electrical signal to obtain a control signal based upon said electrical signal for driving a magnet valve for controlling said pressure, thereby varying the injection timing by a proper amount in immediate response to an engine accelerating operation.

Abstract: A line type fuel injection pump comprises a plurality of fuel injection pumps provided in a number one greater than the number of cylinders in an internal combustion engine. The extra injection pump constitutes a component of a liquid abutment regulator means and has an outlet connected to a control inlet of a modulator valve which modulates the supply pressure to the fuel injection pumps as a function of engine speed. A hydraulic actuator varies the amount of fuel injected into the engine in accordance with the supply pressure and may act in combination with a centrifugal governor.