Crankcase ventilation system for a reciprocating internal combustion engine
US4901703A · kind A · utility
32Cited by
2References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 16, 1988 |
| Grant date | Feb 20, 1990 |
| Priority date | — |
| Expiry date | May 16, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01M13/025
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a reciprocating internal combustion engine, which may be turbocharged or normally aspirated, the inlet manifold is connected by a duct 10 to a bypass 9 which in turn connects the crankcase 8 to a point upstream of the throttle. Non-return valves 11 and 12 are disposed in the duct 10 and bypass 9 respectively. An adjustable diaphragm valve 14, whose operation is controlled by the pressure in a pressure sensor line 15 leading to crankcase 8, is disposed in a bypass 13 to the valve 12. The arrangement operates to prevent crankcase overpressure under normal operating conditions of the engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.