Apparatus for and method of controlling intake operation of an internal combustion engine
US7520261B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 12, 2008 |
| Grant date | Apr 21, 2009 |
| Priority date | — |
| Expiry date | Feb 12, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Opening timing of the intake valve of an internal combustion engine is controlled to take a value within a range from 30° to 140° after the top dead center of intake stroke during a period of time before completion of engine warming-up from starting of an engine, and also, effective opening area of the intake valve is made smaller than the effective opening area thereof that occurs after completion of engine warming-up in order to increase the flow velocity of intake air entering through the intake valve, and at the same time, fuel is injected into a combustion chamber during at least one of a first period of time in which the flow velocity of intake air is high immediately after the intake valve is opened and a second period of time previous to the first period of time in which the flow velocity of intake air is high, and during a third period of time starting immediately before ignition timing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.