Machine element or mechanism – Gearing – Interchangeably locked
Patent
1991-02-27
1992-03-10
Diehl, Dwight
Machine element or mechanism
Gearing
Interchangeably locked
74336R, 475 7, F16H 6112
Patent
active
050941151
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.
REFERENCES:
patent: 1793228 (1931-02-01), Hackethal
patent: 2151176 (1939-03-01), Acker
patent: 4346728 (1982-08-01), Sulzer
patent: 4484496 (1984-11-01), Weis
patent: 4841793 (1989-06-01), Leigh-Monstevens et al.
patent: 4938088 (1990-07-01), Langley et al.
Makino Koki
Michihira Osamu
Sakamoto Kiyoshi
Takabe Yasuhiro
Diehl Dwight
Mazda Motor Corporation
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