Engine valve actuation for combustion enhancement

Patent · Tue Mar 04 00:00:00 EST 2008

OSTI ID:970557

Reitz, Rolf Deneys ^[1]; Rutland, Christopher J ^[1]; Jhavar, Rahul ^[1]

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1. Madison, WI

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.

• Research Organization: Wisconsin Alumni Research Foundation (Madison, WI)
• Sponsoring Organization: USDOE
• DOE Contract Number: FC04-02AL67612
• Assignee: Wisconsin Alumni Research Foundation (Madison, WI)
• Patent Number(s): 7,337,763
• Application Number: 10/543,067
• OSTI ID: 970557
• Country of Publication: United States
• Language: English

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