Control system for choke valve of carburetor
US6722638B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 2002 |
| Grant date | Apr 20, 2004 |
| Priority date | — |
| Expiry date | Dec 24, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16F9/53
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A choke valve control system includes a choke-operating lever for opening and closing a choke valve of a carburetor, a choke spring for biasing the valve in an opening direction, and a damper for controlling the opening motion of the valve to a lower speed, when the choke valve is opened from its fully closed position by a biasing force of the choke spring. The choke-operating lever, the choke spring and the damper are connected to the choke valve of the carburetor. In this choke valve control system, the damper includes a damper housing, a rotor, and a damper oil which is accommodated in a sealed manner in the damper housing and applies a viscosity resistance to the rotation of the rotor, which resistance increases as the viscosity increases with decreasing temperature. Thus, the time required for opening the choke valve can be controlled in accordance with the level of the environmental temperature of an engine, thereby providing the stabilization of the warming operation of the engine and a reduction in fuel consumption.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.