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:
Jan. 17, 1978
Filed:
Aug. 06, 1975
Minoru Tanaka, Chofu, JA;
Youji Ishii, Fujimi, JA;
Touru Yagi, Musashino, JA;
Syoichi Otaka, Miyoshi, JA;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JA;
Abstract
Timing control mechanism for an internal combustion engine employs a vacuum chamber connected to a solenoid valve operated by a thermal switch responsive to engine temperature. The solenoid valve connects the vacuum chamber to one of two vacuum outlets connected to the engine intake passage. The first of the outlets is positioned adjacent and upstream from the throttle valve and the second of the outlets is positioned downstream from the throttle valve. The passage from the first outlet to the solenoid valve contains orifice means to restrict flow and also contains a check valve in parallel with the orifice means to permit flow toward the solenoid valve. The passage from the second vacuum outlet contains a check valve preventing flow toward the solenoid valve.