Engine valve actuation for combustion enhancement

Details Engine valve actuation for combustion enhancement Engine valve actuation for combustion enhancement

2008-03-04

2008-03-04

Solis, Erick (Department: 3747)

Internal-combustion engines

Means to whirl fluid before, upon, or after entry into...

C123S090150, C123S568140, C123S316000

Reexamination Certificate

active

10543067

ABSTRACT:
A combustion chamber valve, such as an intake valve or an exhaust valve, is briefly opened during the compression and/or power strokes of a 4-strokes combustion cycle in an internal combustion engine (in particular, a diesel or CI engine). The brief opening may (1) enhance mixing withing the combustion chamber, allowing more complete oxidation of particulates to decrease engine emissions; and/or may (2) delay ignition until a more desirable time, potentially allowing a means of timing ignition in otherwise difficult-to-control conditions, e.g., in HCCI (Homogeneous Charge Compression Ignition) conditions.

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