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:
Apr. 13, 2004
Filed:
Jul. 22, 2002
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
In an internal combustion engine provided with a decompression mechanism, a decompression cam that is rotatable with respect to a camshaft between first and second stop positions has a cam profile so that an exhaust valve is opened at the first stop position and is closed at the second stop position. The decompression cam is rotated in the reverse direction to the first stop position by rotating a crankshaft in the reverse direction by an electric motor at startup (position P ). Only the crankshaft is then rotated in the reverse direction (position p ), and the decompression cam is rotated in the normal direction by rotating the crankshaft in the normal direction by the electric motor. During either a compression strokes included within a range of a reverse rotation angle or the first compression stroke after initiation of normal rotation of the decompression cam until the decompression cam reaches the second stop position, the decompression cam opens the exhaust valve and increases the run-up angle of the crankshaft. The aforementioned method and device facilitates a piston overcoming the first compression top dead center decompression operation has stopped without unduly increasing the size and capacity of the required electric motor.