System for regulating valve timing of internal combustion engine
US5924395A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1998 |
| Grant date | Jul 20, 1999 |
| Priority date | — |
| Expiry date | Jan 26, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S903/905
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
To start an internal combustion engine at appropriate intake valve close timing. A valve timing regulation system 10 regulates oil pressure supplied to advance chambers and retard chambers formed by a vane 29 and a housing 28 to advance or retard the vane 29 and change the open/close timing of the intake valve. The position of the vane 29 is fixed by inserting a lock pin 43 into an advance-side engagement hole 49A at the most advanced position. Engine stopping is effected so as to set the vane 29 at the middle position, while starting when the coolant temperature is low is effected after rotating the crankshaft backward by a prescribed angle to fix the vane 29 at the most advanced position and is effected when the temperature is high merely by cranking to fix the vane 29 at the most retarded position. Cold starting is easy when effected at the most advanced position because the compression pressure is high, while vibration at warm starting is reduced when starting is effected at the most retarded position because the compression pressure is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.