Fuel injection pump for internal combustion engines

Claim 1

A fuel injection pump for internal combustion engines comprising a fuel supply pump driven in synchronism with the fuel injection pump, a pressure side of said fuel supply pump arranged to communicate with a work chamber ahead of an adusting piston, said adjusting piston serves to adjust the injection onset and is exposed to a restoring force in a chamber connected via a discharge line to a discharge opening, said discharge opening being controlled by a control piston of a pressure control valve including a relief chamber in order to generate an rpm-dependent control pressure at the pressure side of said pressure control valve, said control piston being exposed to a restoring force and further arranged to enclose on one side a control pressure chamber, said control pressure chamber being in communication with said pressure side of said fuel supply pump via a throttle connection and with said relief chamber via a relief line connected with a pressure valve including a housing, a valve closing member which is exposed to a valve spring, the initial stress of said valve spring being variable by means of a support point which is displaceable in accordance with air pressure, in which said valve closing member of said pressure valve comprises a slide means, and a control line branches off from said relief line between a pressure maintenance valve and said pressure valve, said control line leading to an adjusting device for adjusting a fuel injection quantity and to a further adjusting device for affecting an exhaust gas recirculation quantity.