Hydraulic control device and abnormality determination method for the same
US9651146B2 · kind B2 · utility
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7Claims
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Key dates
| Filing date | Nov 15, 2012 |
| Grant date | May 16, 2017 |
| Priority date | — |
| Expiry date | Nov 27, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2061/1212
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic control device that controls a hydraulic pressure for a plurality of friction engagement elements included in an automatic transmission mounted on a vehicle to establish a plurality of shift speeds, including: a plurality of pressure regulation valves, a plurality of hydraulic switches, speed change control means, and abnormality determination means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.