Intake system of a multi-cylinder internal combustion engine
US4256063A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1979 |
| Grant date | Mar 17, 1981 |
| Priority date | — |
| Expiry date | Mar 21, 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 forming therein a main and an auxiliary intake passage, which are equipped with a main and an auxiliary carburetor, respectively. A second throttle valve is provided for each cylinder. Each of the secondary throttle valves is arranged in the respective manifold branch forming therein the main intake passage. Each of auxiliary branch intake passages branched off from the auxiliary intake passage opens into the respective intake port at a position near the intake valve. A primary throttle valve is arranged in the auxiliary intake passage and opened in accordance with increase in level of the load of an engine. The secondary throttle valves are opened after the opening degree of the primary throttle valve is increased beyond a predetermined opening degree.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.