Automatic transmission failure determination apparatus
US9377102B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 9, 2015 |
| Grant date | Jun 28, 2016 |
| Priority date | — |
| Expiry date | Jul 9, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2200/006
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An apparatus for determining failure of an automatic transmission having gear engaging mechanisms engaging one of gears to input shafts and an output shaft, a first to third pressure-regulating valves, a first and second shift valves, and a failure determiner. The failure determiner energizes a solenoid valve to output a clutch pressure to one of the gear engaging mechanisms when the clutch pressure is less than a prescribed pressure, determines whether the one of the gear engaging mechanisms operates based on output of an operating state detector, and determines that the second pressure-regulating valve has failed when the one of the gear engaging mechanisms is determined to be inoperative.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.