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. 08, 2014
Filed:
Jun. 06, 2008
Hisayuki Sueoka, Tokyo, JP;
Yasuyoshi Miyauchi, Tokyo, JP;
Yasuo Morise, Tokyo, JP;
Tatsumi Otomura, Tokyo, JP;
Hisayuki Sueoka, Tokyo, JP;
Yasuyoshi Miyauchi, Tokyo, JP;
Yasuo Morise, Tokyo, JP;
Tatsumi Otomura, Tokyo, JP;
Hirata Corporation, Tokyo, JP;
Abstract
A method for adjusting a valve clearance in a cylinder head using a rocker arm of a support point adjustable type. In the method, an adjustment screw is rotated in one direction until a camshaft comes in contact with a cam shaft contact section to make the amount of valve opening zero, then further rotated until the valve is released with a certain valve opening amount, and after that, rotated in a reverse direction by a certain rotation angle and accordingly loosened until a desired valve clearance value is obtained. In the process above, the method determines a first rotation angle of the adjustment screw necessary for the adjustment screw to move from a position where the valve is released with the certain valve opening amount to a position where the camshaft comes in contact with the camshaft contact section. Then, the method determines a second rotation angle of the adjustment screw necessary for the adjustment screw to move from the position where the camshaft comes in contact with the camshaft contact section to a position where the desired valve clearance value can be obtained. After that, the method rotates the adjustment screw in the reverse direction by a given rotation angle that is a sum of the first and second rotation angles.