METHODS OF CONDITIONING FLUID IN AN ELECTRONICALLY-CONTROLLED UNIT INJECTOR FOR STARTING

• Main Authors: FLINN, MICHAEL A, AUSMAN, THOMAS G, ERTEL, JOHN G
• Format: Patent
• Language: English; French
• Published: 12.04.1993
• Edition: 5
• Subjects: ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES; BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MECHANICAL ENGINEERING; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; WEAPONS

2095348 9307384 PCTABS00021 Herein are disclosed methods of conditioning fluid, such as damping fluid, in an electronically-controlled unit injector (18) in order to facilitate quick starting of an engine (12). Fluid normally used to dampen the motion of an electrical actuator assembly (36) of the unit injector (18) can remain in the actuator assembly (36) after the engine (12) is stopped. If too much fluid remains and cools off in the actuator assembly (36), 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 (36) while the engine (12) is at rest and thereby enables quicker response of the actuator assembly (36) when the engine (12) is started. Such quicker response improves the fuel injection delivery capability and timing accuracy of the unit injector (18) during engine startup.