Valve duration control system for four-cycle engine
US5553573A · kind A · utility
36Cited by
8References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 2, 1995 |
| Grant date | Sep 10, 1996 |
| Priority date | — |
| Expiry date | Aug 2, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/2102
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A control system for a four-cycle internal combustion engine controls a cam drive mechanism for an intake valve such that a cam of the cam drive mechanism maintains a valve open duration of the intake valve at a short valve open duration in response to a shift from engine operation at low speed with low load to engine operation at low speed with high load, and the cam increases the valve open duration of the intake valve in response to a shift from engine operation at low speed with low load to engine operation at low speed with middle load that is higher than the low load but lower than the high load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.