Compression relief engine brake
US4697558A · kind A · utility
16Cited by
3References
13Claims
0Family size
Inventor
Key dates
| Filing date | Feb 18, 1986 |
| Grant date | Oct 6, 1987 |
| Priority date | — |
| Expiry date | Feb 18, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L13/06
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Apparatus is disclosed for employing the compression cycle of a four-cycle internal combustion engine as means for achieving braking of a vehicle driven by said engine. The invention relates to an improved hydraulically activated relief brake utilizing an exhaust valve associated with each cylinder of the engine. An unsprung hydraulic sleeve valve is provided to advantageously maintain each exhaust valve in a slightly open position during application of the brake, thus reducing the force required to open the exhaust valve during the compression cycle of the engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.