Fuel injection pump
AssigneeRobert Bosch GmbH
InventorGerald Hofer
Life of this patent
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Abstract
A fuel injection pump having a governor in which the downward regulation sleeve is also displaced toward a smaller injection quantity if the flyweight adjustment fails when the injection quantity selection lever is at the idling position.
Claims5
A fuel injection pump for internal combustion engines having a fuel delivery pump generating an rpm-dependent pressure and having an rpm governor, said governor including a tension lever for actuating a quantity control member which is engaged in the direction of decreasing injection quantity by a governor sleeve provided with a longitudinal bore by means of which it is slidable in sealingly manner on a tang and enclosing in said bore a damping chamber connected via a bore to surrounding rpm-dependent pressure, said rmp-dependent pressure creating a damping force acting on the governor sleeve, the governor sleeve being displaceable by means of flyweights as well as by a regulator spring whose force is variable through an adjustment lever characterized by the provision of at least one area of the governor sleeve exposed to a second force other than the damping chamber force, whereby the damping chamber force applies a resulting force on the governor sleeve in the direction of decreasing fuel quantity, which force displaces the governor sleeve toward downward fuel regulation irrespective of the action of the flyweights at the idling position of the adjustment lever but at a higher rpm than the idling rpm.
Dependencies are inferred from the claim text.