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US 2014/0331975 A1Published application
System and method for operating a direct injection fuel pump
AssigneeFord Global Technologies, LLC
InventorsChris Paul Glugla, Jeffrey Allen Doering, Ken Jahr
Life of this patent
Estimating the term…
Abstract
Methods and systems are provided for a direct injection fuel pump. The methods and systems selectively operate the direct injection fuel pump with varying levels of efficiency.
Claims20
A method of operating a direct injection fuel pump, comprising:
- during a first condition, operating a direct injection fuel pump with a first piston lift amount;
- and
- during a second condition, the second condition different from the first condition, operating the direct injection fuel pump with a second piston lift amount, the second piston lift amount greater than the first lift amount.
A method of operating a direct injection fuel pump, comprising:
- adjusting a cam profile sleeve lifting a fuel pump piston in response to engine operating conditions, the cam profile sleeve adjusted via shifting the cam profile sleeve's position longitudinally along a direct injection fuel pump drive shaft.
A direct injection fuel pump system, comprising:
- a direct injection fuel pump including a piston, a driveshaft, a cam profile sleeve fitted over the driveshaft, and an actuator pin.
Dependencies are inferred from the claim text.