Internal combustion engine
US4271803A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 1979 |
| Grant date | Jun 9, 1981 |
| Priority date | — |
| Expiry date | May 22, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An internal combustion engine comprises a first raised portion formed on the inner wall of the cylinder head, a second raised portion formed on the top face of the piston at a position opposite to the first raised portion with respect to the axis of the piston, and a third raised portion formed on the inner wall of the cylinder head above the second raised portion. A first flat squish area is formed between the flat peripheral top face of the piston and the flat bottom face of the first raised portion. A second spherical shell shape squish area is formed between the spherical bottom wall of the third raised portion and the spherical rear face of the second raised portion. A secondary throttle valve is arranged in the intake passage located downstream of the throttle valve of a carburetor. A secondary intake passage is branched off from the intake passage located between the secondary throttle valve and the throttle valve of the carburetor and opens into the intake port at a position near the intake valve. The secondary throttle valve is closed when the engine is operating under a light load, while the secondary throttle valve is opened when an engine is operating under a heavy load…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.