초록 ▼

The invention relates to a fuel injection pump for internal combustion engines, having a pump piston guided in a cylinder bore of a pump body, which pump piston defines a pump work chamber in the cylinder bore and which is axially driven by a cam drive counter to the force of a restoring spring. Eac

The invention relates to a fuel injection pump for internal combustion engines, having a pump piston guided in a cylinder bore of a pump body, which pump piston defines a pump work chamber in the cylinder bore and which is axially driven by a cam drive counter to the force of a restoring spring. Each individual cylinder of the engine to be fed is assigned a fuel injection pump, which is inserted into a bore in the engine housing; at the same time, the engine housing serves as the pump housing. In order to limit frictional wear, which is caused by the back-and-forth motion of the roller tappet of the cam drive guided in the engine housing and to easily replace pump parts, a thin-walled slide bush is disposed between the roller tappet and the housing bore. The slide bush is fastened with radial play on the pump body and additionally prevents the roller tappet from slipping out and prevents the preassembled fuel injection pump from falling apart when it is not installed in the housing bore.

대표청구항 ▼

A fuel injection pump for internal combustion engines that supplies fuel to an individual injection valve associated with a cylinder of the internal combustion engine, having a pump body (3) which is inserted into a bore (2) in a housing (1) of the engine, said pump body includes a cylinder bore (5)

A fuel injection pump for internal combustion engines that supplies fuel to an individual injection valve associated with a cylinder of the internal combustion engine, having a pump body (3) which is inserted into a bore (2) in a housing (1) of the engine, said pump body includes a cylinder bore (5), a pump piston (7), guided in the cylinder bore of the pump body, said pump piston encloses a pump work chamber (11) in said cylinder bore, said pump piston (7) is axially set in motion by a cam drive (15) provided in the engine housing (1) via a roller tappet (19), which is guided in the engine housing (1) and secured against torsion, counter to a force of a restoring spring (17) which is supported on the pump body (3) and the roller tappet (19), the roller tappet (19) is guided in a slide bush (29), which is introduced between said roller tappet and the engine housing (1), said slide bush is inserted into the housing bore (2) and is fastened so that the slide bush does not rotate, said slide bush also encompasses the restoring spring (17) and a part of the pump body (3), and a bolt (43) extending into said tappet includes a head which slides in a longitudinal slit (41) in said slide bush (29), said bolt (43) and longitudinal slit connection connects the roller tappet (19) in the slide bush (29), to fix the rotational position of the roller tappet (19) relative to the cam drive (15).