Control system for transmission engagement
US4650048A · kind A · utility
4Cited by
6References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1985 |
| Grant date | Mar 17, 1987 |
| Priority date | — |
| Expiry date | Sep 24, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2059/746
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control system for preventing engagement of a transmisson when its power source is started with the transmission in gear. The system uses a control valve, an engagement override valve, a check valve and a relief valve to interrupt fluid flow to clutch or brake elements during initial startup unless the transmission is in neutral or park. Unwanted triggering of the override system upon a reduction of hydraulic pressure is avoided in this control system. The control valve of this system may be made responsive to clutch pedal or shift lever movement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.