Direct-injection spark-ignition engine with a turbo charging device
US6684630B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2002 |
| Grant date | Feb 3, 2004 |
| Priority date | — |
| Expiry date | Mar 28, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A direct-injection, spark-ignition engine of the present invention includes a turbo-charging device which promotes the temperature rise or activation of the exhaust-gas purification catalyst disposed downstream of a turbine during cold start. During engine cold start, the fuel injection by the fuel injector is divided into a leading fuel injection performed during the latter half of the compression stroke, prior to the ignition timing, and a trailing fuel injection performed during the expansion stroke, after the ignition timing. The amount of the intake-air and the amount of the fuel injection are so controlled that the air-fuel ratio in the combustion chamber during the combustion of the fuel by the leading fuel injection (a leading air-fuel ratio) is within the range of 2<&lgr;<3, and the air-fuel ratio in the combustion chamber during the combustion of the fuel by the trailing fuel injection (a total air-fuel ratio) is within the range of 1<&lgr;<2. This raises exhaust-gas temperature with heat from the combustion of the fuel injected in the compression stroke and by the oxidization of the unburned HG from turbine agitation, to raise the exhaust-gas temperature for promoting th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.