Engine exhaust gas recirculating control
US3930475A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 1973 |
| Grant date | Jan 6, 1976 |
| Priority date | — |
| Expiry date | Aug 24, 1993 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M26/56
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The engine has a duct connecting the gases in the exhaust gas crossover passage to the intake manifold, the duct normally being closed by a valve that is opened by manifold vacuum that is modulated as a function of carburetor throttle blade opening and connected to the duct past an air-bleed device that normally is open and closed against a spring force by unmodulated manifold vacuum below a predetermined level so that the gas recirculating valve opening signal force varies directly with manifold vacuum decreases to prevent recirculation during engine idle and cruising and wide-open throttle operations while providing controlled operation in the engine accelerating range between.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.