Carburetor having an electrically assisted choke valve
US4768478A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 14, 1987 |
| Grant date | Sep 6, 1988 |
| Priority date | — |
| Expiry date | Sep 14, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M1/10
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A carburetor for internal combustion engines has an automatic starting device comprising a choke valve based toward opening by the air flow and toward closure by a temperature responsive bimetallic spiral when cold. A device further comprises a stop member an electrically controlled movable stop member having at least one active position in which it permits complete closure of the choke valve and a rest position in which it prevents closing movement of the choke valve beyond a predetermined position, and means arranged to bring said stop member into said active position, responsive to closure of the ignition switch and for being inhibited if after a sequence of operation of the cold engine during a period greater than a first threshold value, then rest condition of the engine for a period less than a second predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.