Method and apparatus for limiting the action of a manual choke by the recirculation of exhaust gases
US4250847A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 1979 |
| Grant date | Feb 17, 1981 |
| Priority date | — |
| Expiry date | May 9, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M2026/004
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for the limitation of the action of a manual choke by the recirculation of exhaust gases to the intake manifold is disclosed. A vacuum valve is located in a conduit connecting the intake and exhaust manifolds. The vacuum valve is activated by a vacuum transmitted through a conduit connected with the carburetor. The conduit is selectively opened by an electrovalve. The electrovalve receives a signal to open the conduit when the manual choke is activated and an engine temperature sensor indicates that the engine temperature has exceeded a predetermined value. A time delay circuit may delay the sending of the signal to the electrovalve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.