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:
Mar. 10, 1992
Filed:
Feb. 27, 1991
Osamu Michihira, Hiroshima, JP;
Kiyoshi Sakamoto, Hatsukaichi, JP;
Yasuhiro Takabe, Higashihiroshima, JP;
Koki Makino, Hiroshima, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
An operation apparatus for a vehicle automatic transmission mechanism includes first and second actuators, connected in parallel with a hydraulic valve, for driving the hydraulic valve to switch a travel range of an automatic transmission mechanism, a control unit for controlling the first and second actuators, and a transmission operation unit for outputting a range signal indicating a presently set travel range to the control unit. The transmission operation unit includes a stroke contact type operation switch on which travel ranges to be set are sequentially aligned along a predetermined path. The control unit includes a first CPU, connected to the first actuator, for controlling a driving operation of the first actuator, a second CPU, connected to the second actuator, for controlling a driving operation of the second actuator, and a third CPU, connected to the first and second CPUs, for setting, in a driving state, one of the first and second actuators connected to one of the first and second CPUs, which CPU serves as a main unit, for monitoring system failed states of the first and second CPUs, for, when the third CPU determines that a system failed state occurs, inhibiting the driving operation of the actuator connected to the system-failed CPU, and for permitting the driving operation of the actuator connected to the CPU which does not suffer from the system failed state.