Air-gas mixing device with dual-control fuel valve
US4703742A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 9, 1986 |
| Grant date | Nov 3, 1987 |
| Priority date | — |
| Expiry date | Oct 9, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/30
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An air-gas mixing device of the type used to mix air and gaseous fuel as a gaseous fuel charge for an internal combustion engine and particularly suitable for use with engines operating generators and the like at constant speed. Fuel and air valves for controlling the air/fuel mixture are coupled together and actuated by a fluid motor in response to a fluid pressure signal, derived from the intake manifold pressure of the engine, acting on the diaphragm of the fluid motor. The fuel valve is also independently actuated by a second fluid motor, mounted to the diaphragm of the first fluid motor, in response to ambient air pressure which is applied to the second fluid motor upon a sudden increase in engine load demand to enlarge the opening of the fuel valve and thereby enrich the air/fuel mixture to prevent a significant falloff in engine speed. Because of the dual control of the fuel valve, the device is capable of providing a more optimum lean air/fuel mixture for better fuel economy and emissions control during normal operating conditions while being able to quickly enrich the fuel mixture in response to sudden increases in load demand.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.