Apparatus for controlling internal combustion engine having electrically heated catalyst
US5765371A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 1996 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | Dec 5, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An apparatus for controlling an internal combustion engine having an electrically heated catalyst heats the catalyst with sufficient power without fluctuating the rotation speed of the engine. The apparatus has an alternator 2 driven by the engine 1, an intake controller 3 disposed in an intake system of the engine 1, to change the quantity of intake air, a battery 8 charged by the alternator 2, the catalyst 4 disposed in an exhaust system of the engine 1 and powered by the battery 8 and alternator 2, and a regulator 7 for changing the field current of the alternator 2, to change power to be generated by the alternator 2. When activating the catalyst 4, the intake controller 3 increases the quantity of intake air, and the regulator 7 increases power to be generated by the alternator 2. Increasing the field current of the alternator 2 is delayed behind increasing the quantity of intake air. Alternatively, increasing the quantity of intake air as well as the field current of the alternator 2 are carried out gradually.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.