Intake system of an internal combustion engine of a counter-flow type
US4253432A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1979 |
| Grant date | Mar 3, 1981 |
| Priority date | — |
| Expiry date | Mar 28, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A multi-cylinder engine comprising an intake manifold equipped with a carburetor. A secondary throttle valve is provided for each cylinder. Each of the secondary throttle valves is arranged in the respective manifold branch and fixed onto a common throttle shaft. An auxiliary intake passage is branched off from the collecting portion of the intake manifold and connected to a distribution channel. Each of the intake ports is connected to the distribution channel via a corresponding channel branch which opens into the intake port at a position near the intake valve. The common throttle shaft of the secondary throttle valves is connected to a vacuum operated diaphragm apparatus so that the secondary throttle valves are opened in accordance with a reduction in the level of vacuum produced in the intake manifold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.