Exhaust gas cleaning device for internal combustion engine
US4535589A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1984 |
| Grant date | Aug 20, 1985 |
| Priority date | — |
| Expiry date | Jun 13, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24149
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An exhaust gas cleaning device provided with a filter member for collecting particulates in the exhaust gases, and an electric heater for burning and eliminating the particulates collected by the filter member, is disclosed. The filter member is formed of electrically insulating ceramic and is installed in the exhaust gas passage. The heater is formed of ceramic provided with a large number of open passages and having electric conductivity or electrically insulating property. The heater is closely adhered to the exhaust gas inlet end surface of the filter member. In the case that the electrically conductive ceramic is used, the ceramic itself acts as a heating element which heats and ignites the collected particulates. In the case that the electrically insulating ceramic is used, a metallic film acting as a heating element is formed on the walls of the ceramic defining the open passages by printing, vacuum evaporating or other method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.