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. 05, 2002
Filed:
Apr. 25, 2000
Tatsuyuki Ohashi, Wako, JP;
Shoji Asatsuke, Wako, JP;
Hideki Wakamatsu, Wako, JP;
Takayuki Yamaguchi, Wako, JP;
Yoshiharu Saito, Wako, JP;
Honda Giken Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
An automatic transmission comprises a forward/reverse selection hydraulic servomechanism which actuates a dog clutch and a plurality of clutches and For this automatic transmission, a control system comprises first˜fifth on/off solenoid valves and first˜third linear solenoid valves These valves are used to control the supply and drain of a line pressure to and from the forward/reverse selection hydraulic servomechanism and first˜fifth shift valves and so as to control the actuation thereof for the selective engagement of the clutches. This system, when it detects, by a hydraulic switch a condition that the D range is selected and that the actuation command signals being sent to the solenoid valves correspond to one of the signal combinations which are used for setting the driving modes of the D range, allows the actuation of the solenoid valves by these actuation command signals.