The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 03, 2012
Filed:
Dec. 25, 2008
Paul Allen Howard, Reston, VA (US);
Paul Allen Howard, Reston, VA (US);
Other;
Abstract
A two-stroke internal combustion engine () is disclosed. Fuel efficiency is improved and extended over a wide power band by an inlet air valve () which controls the air charge and maintains a constant compression ratio. An integrated positive displacement supercharger () provides adequate air charge at all power levels and recovers compressor power from unused supercharged air. An integrated post combustion chamber () extends the power stroke by mixing combustion gases with ambient air for farther expansion and power production. Exhaust noise is reduced because the combustion gases are vented from the engine at lower pressure, lower velocity and temperature. The opposed cylinder design provides nearly continuous power by combining supercharger power recovery with extended power strokes.