Secondary air supply system for an engine exhaust gas purifying system
US4674277A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 1986 |
| Grant date | Jun 23, 1987 |
| Priority date | — |
| Expiry date | Jul 22, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A secondary air supply system for an engine exhaust system in which the secondary air is drawn to the engine exhaust passage under the suction pressure produced in the exhaust passage. The secondary air supply system includes a non-return valve connected with the engine exhaust passage and an expansion chamber connected with the non-return valve through an elongated connecting passage. The expansion chamber is formed in a casing and the non-return valve is located in a valve chamber formed in the casing and separated from the expansion chamber by a partition wall. The connecting passage is formed by a pipe extending in the expansion chamber from the partition wall.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.