Intake valve cleaning method for a direct injection engine...

Details Intake valve cleaning method for a direct injection engine... Intake valve cleaning method for a direct injection engine...

2006-11-21

2006-11-21

Gimie, Mahmoud (Department: 3747)

Internal-combustion engines

Accessories

Covers, trays, vibrators, corrosion inhibitors, air filters

C123S090150

Reexamination Certificate

active

07137377

ABSTRACT:
A method for a vehicle traveling on the road having an engine with adjustable valve operation is described. The method includes performing a valve cleaning operation for reducing deposits on a valve of the engine; and at least during said operation, adjusting valve timing of at least a valve of the engine and a fuel injection amount to increase an amount of fuel pushed back from a cylinder past the valve with deposits and then re-inducted through the valve with deposits.

REFERENCES:
patent: 6178944 (2001-01-01), Kerns et al.
patent: 2003/0051707 (2003-03-01), Pilgram et al.
patent: 2001289097 (2001-10-01), None
patent: 2004251155 (2004-09-01), None

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