Spark-ignition internal combustion engine capable of preventing noxious gas emissions
US4350129A · kind A · utility
13Cited by
11References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1978 |
| Grant date | Sep 21, 1982 |
| Priority date | — |
| Expiry date | Apr 5, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An engine is provided with two spark plugs in each combustion chamber to ignite stoichiometric air-fuel mixture mixed with a large proportion of inert gases to lower NOx emission level. The engine is equipped with hydraulic valve lifters which are mechanically connected to intake and exhaust valves to control the valve overlap of the intake and exhaust valves. By the action of the valve lifters, the valve overlaps are increased in the normal driving operation range of the engine to prevent discharge at the terminal stage of exhaust valve opening exhaust gases containing a considerably large amount of hydrocarbons.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.