Method for heating up a catalyst in combustion engines with direct fuel injection
US7168238B2 · kind B2 · utility
2Cited by
8References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 9, 2002 |
| Grant date | Jan 30, 2007 |
| Priority date | — |
| Expiry date | May 6, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method for heating up a catalytic converter in internal combustion engines having gasoline direct injection is presented and has the steps: shifting the ignition toward retard; checking whether the charge of the cylinders with air exceeds a pregiven threshold; and, dividing the fuel injection into two component quantities which are injected in advance of the ignition when the air charge exceeds the threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.