Air intake side secondary air supply system for an internal combustion engine
US4660533A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 1986 |
| Grant date | Apr 28, 1987 |
| Priority date | — |
| Expiry date | May 21, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Air intake side secondary air supply system for an internal combustion engine includes first and second secondary air supply passages leading to an intake manifold in which an open/close valve and an air control valve are respectively provided for a proportional control and an integral control of secondary air. In order to improve a driveability of the engine when no load is applied to the engine when the engine temperature is low, the air control valve is supplied with a pressure for rapidly closing the second air intake side secondary air supply passage so as to stop at least the integral control of the feedback control of air/fuel ratio immediately when a no-load condition is detected during a cold operation of the engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.