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US 10,273,945 B2Granted
Mechanical fuel pump deactivation
AssigneeCummins Inc.
InventorAdam C. Cecil
Life of this patent
Estimating the term…
Abstract
A mechanical fuel pump is disclosed for delivering fuel to an engine of a vehicle, the mechanical fuel pump having an activated configuration and a deactivated configuration. A dual fuel system and method are also disclosed for use with the mechanical fuel pump.
Claims9
A fuel pump comprising:
- a rotatable camshaft including a lobe which protrudes from the camshaft and is immovable relative to the camshaft as the camshaft rotates through a plurality of revolutions;
- a pump housing defining a pump chamber;
- a pump piston mounted in the pump chamber for reciprocal movement;
- and
- a deactivating element operatively positioned between the lobe and the pump piston, the deactivating element having:
- a first configuration wherein the deactivating element transfers movement of the lobe to the pump piston to deliver fuel to an engine;
- and
- a second configuration wherein the deactivating element absorbs movement of the lobe, thereby causing the pump piston to remain substantially stationary and avoid operating the fuel pump during rotation of the camshaft through the plurality of revolutions.
5 more elements
A fuel pump comprising:
- a rotatable camshaft including a lobe which protrudes from the camshaft and is immovable relative to the camshaft as the camshaft rotates through a plurality of revolutions;
- a pump housing defining a pump chamber;
- a pump piston reciprocally mounted in the pump chamber;
- and
- a deactivating element that uncouples the lobe from the pump piston to cause the pump piston to remain substantially stationary and avoid operating the fuel pump during rotation of the camshaft through the plurality of revolutions.
2 more elements
Dependencies are inferred from the claim text.