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:
Jun. 13, 2006
Filed:
Nov. 12, 2004
Shigeyuki Kusano, Okazaki, JP;
Yasushi Morii, Nagoya, JP;
Shigeyuki Kusano, Okazaki, JP;
Yasushi Morii, Nagoya, JP;
Denso Corporation, , JP;
Abstract
In a valve timing control apparatus, hydraulic oil is supplied into retarding and advancing chambers, and first and second hydraulic chambers, when hydraulic pressure is less than a predetermined pressure and when a phase difference between a most advancing target phase and actual phase of a driver-side rotating member relative to a driven-side rotating member is small. Hydraulic pressure is applied from the first and second hydraulic chambers to the stopper pin, so that the stopper piston is restricted from protruding to the engaging ring before the actual phase coincides with the most advancing target phase. Hydraulic oil is drained from the retarding chamber and the first hydraulic chamber, and hydraulic pressure in the second hydraulic chamber is small, so that the stopper pin protrudes and engages with an engaging ring at the most advancing target phase.