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:
Feb. 07, 2006
Filed:
May. 20, 2003
Tetsuya Hasebe, Utsunomiya, JP;
Tetsu Sugiyama, Utsunomiya, JP;
Tomofumi Ikematsu, Utsunomiya, JP;
Masao Kubodera, Shioya-gun, JP;
Yusuke Tatara, Tokyo, JP;
Tetsuya Hasebe, Utsunomiya, JP;
Tetsu Sugiyama, Utsunomiya, JP;
Tomofumi Ikematsu, Utsunomiya, JP;
Masao Kubodera, Shioya-gun, JP;
Yusuke Tatara, Tokyo, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
A hydraulic control device for valve trains of an engine having cylinders which are optionally deactivated by applying oil pressure to the valve train so as to suspend the operations of associated intake and exhaust valves, the hydraulic control device comprising a plurality of rocker shafts which are arranged in line, and each of which is provided with hydraulic passages therein for applying oil pressure to each of the valve trains so as to activate and deactivate the cylinders, a plurality of sets of hydraulic circuits, which are provided to the rocker shafts, respectively, for applying oil pressure to each of the rocker shafts, and oil pressure measuring sections provided to the hydraulic circuits, respectively, for measuring oil pressure in each of the hydraulic circuits.