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. 28, 2003
Filed:
Aug. 23, 2002
Tetsuo Muraji, Kanagawa, JP;
Mikuni Corporation, Tokyo, JP;
Abstract
In the present apparatus, a bypass exhaust pipe which communicates between the cylinder bore and the exhaust passage is disposed in the region of bottom dead center of the piston in an engine that comprises a piston that performs a reciprocating motion between top dead center and bottom dead center inside a cylinder bore, electromagnetic actuators which use an electromagnetic force to open and close an intake valve and an exhaust valve that open and close a combustion chamber, and an exhaust passage. As a result, in an engine in which the intake and exhaust valves are opened and closed by an electromagnetic driving mechanism, the opening and closing of the exhaust valve by an electromagnetic urging force can be securely and accurately performed at a specified timing without increasing the size or cost of the apparatus.