Operation apparatus for vehicle automatic transmission mechanism
US5094115A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1991 |
| Grant date | Mar 10, 1992 |
| Priority date | — |
| Expiry date | Feb 27, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/1926
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
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 th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.