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AssigneeCaterpillar Inc.
InventorsThomas G. Ausman, John G. Ertel, Michael A. Flinn
Estimating the term…
Herein are disclosed methods of conditioning fluid, such as damping fluid, in an electronically-controlled unit injector in order to facilitate quick starting of an engine. Fluid normally used to dampen the motion of an electrical actuator assembly of the unit injector can remain in the actuator assembly after the engine is stopped. If too much fluid remains and cools off in the actuator assembly, quick starting of a cold engine may be hindered. Each of the above methods expels and/or heats up at least a portion of the remaining fluid in the actuator assembly while the engine is at rest and thereby enables quicker response of the actuator assembly when the engine is started. Such quicker response improves the fuel injection delivery capability and timing accuracy of the unit injector during engine startup.
A method of conditioning damping fluid in a fuel system having an electronically-controlled unit injector and a pump operable to supply damping fluid to an electrical actuator assembly of the unit injector comprising the steps of:
A method of conditioning actuating fluid in a fuel system having a hydraulically-actuated electronically-controlled unit injector and a pump operable to supply actuating fluid to the unit injector comprising the steps of:
A method of conditioning actuating fluid in a fuel system having an electronically-controlled unit injector and a pump operable to supply damping fluid to an electrical actuator assembly of the unit injector comprising the steps of:
A method of conditioning actuating fluid in a fuel system having a hydraulically-actuated electronically-controlled unit injector and a pump operable to supply actuating fluid to the unit injector comprising the steps of:
Dependencies are inferred from the claim text.