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US 8,965,667 B2Granted
Engine startup method
AssigneeGM Global Technology Operations LLC
InventorsDavid P. Sczomak, Robert J Gallon, Joseph J. Moon
Life of this patent
Estimating the term…
Abstract
A method for starting an engine includes sensing a triggering event and monitoring pressure in a fuel rail. A cam shaft of the engine is oscillated with a cam phaser. The cam shaft does not complete a full rotation during the oscillation. A fuel rail pump is operated with the oscillating cam shaft until the monitored pressure in the fuel rail reaches a minimum level, and the engine is started after reaching the minimum level.
Claims10
A method for starting an engine having a fuel rail, comprising:
- sensing a triggering event;
- monitoring pressure in the fuel rail;
- oscillating a cam shaft of the engine with a cam phaser, wherein the cam shaft does not complete a full rotation during oscillation;
- operating a fuel rail pump with the oscillating cam shaft until the monitored pressure in the fuel rail reaches a minimum level;
- and
- starting the engine after the monitored pressure reaches the minimum level.
3 more elements
A method for starting an engine having a fuel rail, comprising:
- sensing a triggering event;
- monitoring pressure in the fuel rail;
- monitoring for an operator startup request;
- oscillating a cam shaft of the engine with a cam phaser, wherein the cam shaft does not complete a full rotation during oscillation;
- operating a fuel rail pump with the oscillating cam shaft until the monitored pressure in the fuel rail reaches a minimum level;
- and
- starting the engine after the monitored pressure reaches the minimum level and the operator startup request occurs.
4 more elements
Dependencies are inferred from the claim text.