Air-fuel control for alternative engine fuels

Air/fuel induction system for a multi-cylinder internal combusti

Apparatus for air-injection of liquid gas

Apparatus for air-injection of liquid gas

Apparatus for alternate liquid or gaseous fuel operation of inte

Apparatus for converting a carburetor for gaseous fuel

Apparatus for enabling an engine to burn either liquid fuel or g

Apparatus for operating an internal combustion engine with vario

Arrangement for switching a carburetor in internal combustion en

Auxiliary supply system

Bi-fuel gasoline and low pressure gas fuel system and method...

Carburetor mixture controller apparatus

Combined diesel and natural gas engine fuel control system and m

Control mechanism for selectively operating an internal combusti

Control mechanism for selectively operating an internal combusti

Conversion system with electronic controller for utilization of

Conversion system with electronic controller for utilization...

Device for improving gasoline fuel consumption

Diesel engine secondary fuel injection system

Direct injection propane fuel system for diesel engine applicati