Patent ID: 6453880
Filing Date: 2002-09-24
Classification: F02D,F02M

Abstract:
A fuel injection pump, comprising a housing, a cam drive for at least first and second pump pistons and an injection adjuster piston (10), serving to adjust an injection onset and acting on the cam drive, said adjuster piston, with one face end (12), defines a first pressure chamber (14) in a cylinder (11) and with another face end (13) defines a second pressure chamber (15) in the cylinder (11), the second pressure chamber is acted upon by a pressure fluid which adjusts the injection adjuster piston (10) counter to a restoring means disposed in the first pressure chamber (14), a a control slide (24), which is disposed displaceably in a cylinder bore (22) so as to be movable counter to a force of control spring (31) into one of three ranges of positions. the control slide (24), having control edges (45, 49) so that in one of the three ranges of positions the control slide opens a pressure fluid inlet (50) to one of the pressure chambers (14) in a second of three ranges of positions the control opens a pressure fluid outlet (51) from one of the pressure chambers (14), and in the third of the three ranges of positions the control slide closes both pressure fluid inlet (50) and pressure fluid outlet (51), the second pressure chamber (15) communicates with fluid from a from a pressure source, and the first pressure chamber (14) is made to communicate only with either the pressure fluid inlet (50) that is controlled by the control slide (24) or with the pressure fluid outlet (51) that connects the first pressure chamber (14) to a relief camber.