Spark-ignition gasoline engine

Details Spark-ignition gasoline engine Spark-ignition gasoline engine

2007-03-28

2009-02-03

Wolfe, Jr., Willis R (Department: 3747)

Internal-combustion engines

Spark ignition timing control

Electronic control

C123S316000, C123S406480

Reexamination Certificate

active

07484498

ABSTRACT:
Disclosed is a spark-ignition gasoline engine, which comprises control means operable, when an engine operation zone is a high-load operation zone including a WOT region within at least a low speed range, to adjust a closing timing of an intake valve in such a manner as to maintain an effective compression ratio at 13 or more, and retard an ignition timing to a point within a predetermined stroke range just after a top dead center of a compression stroke, wherein the effective compression ratio is calculated based on an intake-valve closing timing defined by a valve lift amount of 1 mm. The present invention can provide a spark-ignition gasoline engine having both a low-cost performance and a high engine-power performance even in a high-load operation zone (particularly WOT region) in a low speed range.

REFERENCES:
patent: 4958606 (1990-09-01), Hitomi et al.
patent: 5443050 (1995-08-01), Hitomi et al.
patent: 6830020 (2004-12-01), El Tahry et al.
patent: 7121255 (2006-10-01), Liu et al.
patent: 2006/0169246 (2006-08-01), Asai

Affiliated with

Also associated with

Rating

Spark-ignition gasoline engine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Spark-ignition gasoline engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spark-ignition gasoline engine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4127425