Hydraulic circuits for compression release engine brakes
US5462025A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1994 |
| Grant date | Oct 31, 1995 |
| Priority date | — |
| Expiry date | Sep 28, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L13/065
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The relatively complex and expensive "control valves", which are conventionally used in certain compression release engine brakes for such purposes as filling, isolating, and venting the high pressure portions of the hydraulic circuits in the engine brake, are eliminated and more direct means are provided for performing these functions. In brakes having a mechanism for resetting each slave piston, the high pressure portion of the circuit is filled through a selectively openable aperture in the slave piston. In brakes having a mechanism for automatically adjusting slave piston lash or for limiting ("clipping") the forward stroke of the slave piston, high pressure circuit fill is provided through a simple check valve. In systems in which hydraulic fluid is temporarily displaced from the high pressure circuit, a simple accumulator is provided to store hydraulic fluid for quick refill. A single such accumulator may replace multiple control valves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.