Fuel supply system with electric choke and control therefor
US4496496A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 1, 1982 |
| Grant date | Jan 29, 1985 |
| Priority date | — |
| Expiry date | Nov 1, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M1/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel supply system for an automotive engine has a heater which is energized, deenergized and then reenergized in sequence to heat a thermostat metal coil spring over a selected temperature range to regulate opening of a carburetor choke during engine warm up. The heater operation causes the choke to start to open quickly to enhance fuel economy, then to open more slowly to enhance engine driveability as engine warm up occurs, and finally to complete opening in a rapid fashion to enhance fuel economy when engine driveability is assured after engine warm up has taken place. Contacts are connected between a power source and the heater and a pair of dished bimetal elements having central apertures therein are arranged in facing relation to each other between the contacts, the bimetal elements being adapted to move to inverted dished configuration as they are heated to respective different temperatures within the noted temperature range. The contacts are engaged with each other through the element apertures when engine operation is initiated, are separated when one of the elements moves to its inverted configuration in response to heating of the element, and are then reengaged as the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.