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. 31, 1989
Filed:
Jun. 23, 1988
Applicant:
Inventors:
Yutaka Otobe, Saitama, JP;
Noriyuki Kishi, Tokyo, JP;
Assignee:
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01L / ; F01L / ;
U.S. Cl.
CPC ...
123 9012 ; 123 9016 ; 1231 / ;
Abstract
Method and apparatus are described for determining the operability, or lack thereof, of a hydraulic pressure-operated selective coupling mechanism for operating an intake valve or an exhaust valve of an internal combustion engine during various modes of engine operation wherein a control means employed to operate the control valve effective for supplying hydraulic pressure to the mechanism is imparted with an indication of the selected mode of intake or exhaust valve operation and of the hydraulic pressure supplied to the mechanism and is operative to compare such indications to determine whether or not they coincide.