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:
Oct. 07, 2008
Filed:
Jun. 02, 2006
James H Buchwitz, Strathcona, MN (US);
Chad M Cunningham, Chisago City, MN (US);
Nathan D Dahl, Salol, MN (US);
Ryan W Sorenson, Roseau, MN (US);
Dean J Hedlund, Roseau, MN (US);
Christopher R Benning, Stacy, MN (US);
James H Buchwitz, Strathcona, MN (US);
Chad M Cunningham, Chisago City, MN (US);
Nathan D Dahl, Salol, MN (US);
Ryan W Sorenson, Roseau, MN (US);
Dean J Hedlund, Roseau, MN (US);
Christopher R Benning, Stacy, MN (US);
Polaris Industries Inc., Medina, MN (US);
Abstract
An engine is disclosed which may operate in a first operating state wherein a spark ignited fuel is ignited in a combustion chamber with an igniter and a second operating state wherein a compression ignited fuel is ignited in a combustion chamber with an igniter. A compression ratio in the combustion chamber being up to about eight to one. The engine may be a four-stroke engine. The engine may include a piston having a top portion with a recessed central portion.