Shock control arrangement in hydraulic control system
US4274308A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 1979 |
| Grant date | Jun 23, 1981 |
| Priority date | — |
| Expiry date | Mar 23, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H61/067
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In an automatic power transmission having a transmission mechanism including fluid operated frictional units to be actuated to select automatic forward drive and reverse drive gear conditions and make a shift between the first and second gear ratios in the automatic forward drive range condition, a shock control arrangement is provided in the hydraulic control system for the transmission mechanism, comprising a pressure accumulator unit which takes up the fluid pressure to be applied to any of the frictional units during selection of the automatic forward drive range or reverse drive gear position or during upshifting between the first and second gear ratios in the automatic forward drive range, the level at which the pressure accumulator unit is to commence taking up of the fluid pressure for one of the frictional units being varied with engine load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.