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:
Aug. 21, 2007
Filed:
Dec. 12, 2005
Applicants:
Yasunori Niiyama, Kariya, JP;
Takashi Kaneko, Nagoya, JP;
Yasumasa Hagiwara, Kariya, JP;
Inventors:
Assignee:
DENSO CORPORATION, Kariya, Aichi-pref., JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02B 71/00 (2006.01); F02B 71/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
A free piston engine has a pair of pistons opposing to each other and movable in a cylinder, to form a combustion chamber between the pistons. A mixed gas of air and fuel is supplied into the combustion chamber and the mixed gas is auto-ignited when it is compressed by the pistons. A temperature and/or an air-fuel ratio of the mixed gas, and/or a pressure in the combustion chamber is detected to control displacements of the pistons, so that the mixed gas is auto-ignited at an optimum timing to efficiently operate the free piston engine.