Controlling an engine with adjustable intake valve timing

Details Controlling an engine with adjustable intake valve timing Controlling an engine with adjustable intake valve timing

2006-07-04

2006-07-04

Argenbright, T. M. (Department: 3747)

Internal-combustion engines

Charge forming device

Fuel injection system

C123S090150

Reexamination Certificate

active

07069909

ABSTRACT:
A system and method to control an engine wherein at least intake valve timing is retarded relative to a crankshaft position depending on engine operating conditions. According to the method, at least a portion of the fuel is injected during the intake valve open period with retarded valve timing. The method can reduce fuel consumption, reduce transient fuel requirements, improve engine performance, and reduce CO emissions, at least under some conditions.

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Applicant's Admission of Prior Art, 10 pages.
Ford Motor Company, “The Combustion System of the Ford 5.4L 3-Valve Engine”, Stein et al., 12 pages.
SAE 950975, “Dual Equal VCT—A Variable Camshaft Timing Strategy for Improved Fuel Economy and Emissions”, Stein et al., Detroit, MI, Feb. 27-Mar. 2, 1995.
SAE 960584, “Comparison of Variable Camshaft Timing Strategies at Part Load”, Leone et al., Detroit, MI., Feb. 26-29, 1996.

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