Abstract: A fuel injection pump has a cam actuated plunger which is moved inwardly in a bore to displace fuel through an outlet. A port is formed in the wall of the bore and at some position during the inward movement of the plunger is uncovered by a control edge to allow fuel to escape from the bore. In order to damp the final inward movement of the plunger a further edge of the groove progressively covers the port so as to restrict the rate at which fuel can escape through the port.

Abstract: An electronic fuel injection system for providing variable injection timing for a compression ignition engine having a per cylinder displacement volume of at least 5.5 liters includes individual fuel delivery mechanisms, such as a fuel pump having a constant displacement fuel pumping chamber, and fuel injector for each corresponding cylinder, and has a timing signal generator, such as a multi-track optical encoder coupled to a camshaft, for generating a timing signal and a cylinder index signal. The invention also includes an electronic controller device, such as a plurality of individual controllers, which are responsive to various sensor inputs which include the timing signal and the cylinder index signal, for electronically controlling the individual fuel delivery mechanisms. The fuel delivery mechanisms are responsive to an output signal from the electronic controller device and provide a fuel flow volume range of between 100-1600 mm.sup.

Abstract: A fuel system for a multi-cylinder compression ignition engine includes a tubular body (10) having an internal step (11) against which is located a flanged pump barrel (12), a pair of valve blocks (22, 23) mounted in end to end relationship between the barrel (12) and a mounting block (24) secured to the body by bolts (25) which provide a clamping force which ensures a liquid tight seal between the engaging end faces of the blocks and the barrel. A bore (14) in the barrel (12) houses a pumping plunger (15) and the valve blocks house a delivery valve (41) and a spill valve (26), respectively. The spill valve is controlled by an electromagnetic valve (30) mounted on the mounting block.