Apparatus for alternate liquid or gaseous fuel operation of internal combustion engines
An attachment for operating an internal combustion engine on either gaseous or liquid fuel incorporates a modified air cleaner assembly having a cover and an annular adapter between which is sandwiched a typical annular filter element, the adapter fitting over the engine air intake. A diaphragm movably mounts a circular diaphragm plate to the cover to form a chamber therewith on one side of the diaphragm plate and an annular venturi between the other side of the diaphragm plate and the adapter. In one version gaseous fuel is admitted into the chamber through an inlet fitting secured to the cover and thence through ports in the diaphragm plate into the venturi. In another version the gaseous fuel is admitted through an inlet fitting secured to the adapter and thence into the venturi through ports in the adapter, a hose connecting the inlet fitting and the chamber. During gaseous fuel operation pressure of the gas in the chamber in the first version , and gas pressure communicated to the chamber through the hose in the second version, keeps the diaphragm plate adjacent the adapter to maintain the venturi between the two. During liquid fuel operation, however, incoming air lowers the pressure in the chamber sufficiently so that the diaphragm plate automatically moves away from the adapter to provide a largely unobstructed air only path to the engine air intake.
- Assignee:
- Garretson Equipment Co Inc
- Patent Number(s):
- US 4375798
- OSTI ID:
- 6188555
- Resource Relation:
- Patent File Date: Filed date 27 Mar 1981; Other Information: PAT-APPL-248430
- Country of Publication:
- United States
- Language:
- English
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