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US 7,072,757 B2Granted
Fuel control system
AssigneeCaterpillar Inc.
InventorsRobert E. Adams, Douglas M. Chevalier, Jeffery T. Fischer, Robert C. Griffith, Jr., Bin He, Diane M. Laugel
Life of this patent
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Abstract
An apparatus and method of controlling an engine by determining the state of an ignition command device and the speed of an engine and operating a fuel pump during a predetermined period in response to the ignition command device being in a predetermined state and the speed being substantially zero.
Claims11
An engine having a moveable component, comprising:
- a fuel injector tip positioned in each of a plurality of engine cylinders;
- an ignition command device being operable to deliver an ignition signal representative of a state of the ignition command device, which is indicative of a commanded engine state;
- a speed signal indicative of a speed of the moveable component;
- a controller operable to receive the ignition and speed signals and provide a control signal in response to the speed being substantially zero and the ignition command device being in at least one predetermined state;
- a fuel pump responsive to the control signal;
- wherein the control signal causes the pump to be on for a predetermined period and then off;
- a fuel filter fluidly positioned between the pump and the fuel injector;
- and
- wherein the predetermined state is at least one of a run state and a start state.
6 more elements
A method of controlling an engine, comprising:
- controlling individual fuel injectors associated with each of a plurality of cylinders to inject fuel from tips located in the respective cylinders;
- determining a state of an ignition command device, which is indicative of a commanded engine state;
- determining a speed of a moveable component;
- operating a fuel pump during a predetermined period in response to the ignition command device state and the speed determination being substantially zero indicating one of a maintenance mode, a fuel filter priming mode and a lack of fuel shut down mode;
- and
- deactivating the fuel pump after the predetermined period.
3 more elements
Dependencies are inferred from the claim text.