Two stroke cycle internal combustion engines
US4938178A · kind A · utility
13Cited by
6References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1989 |
| Grant date | Jul 3, 1990 |
| Priority date | — |
| Expiry date | Jun 26, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A two stroke cycle engine 10 with an exhaust gas treatment catalyst. Separate reducing and oxidizing catalyst portions 126 and 127 are provided to treat different portions of the exhaust gas exhausted during each exhaust period. The portion of the exhaust gas high in NOx, usually that first exhausted upon initial opening of the exhaust port, is directed to be treated by the reducing catalyst 126 and the remainder of the exhaust gas is directed to be treated by the oxidizing catalyst 127.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.