The Design and Construction of Air Intake System of a Gasoline-Natural Gas Dual Fuel Engine

The concept of this design is to replace a carburetor by an electronic controlled gasoline-natural gas dual fuel injection system, which mainly consists of a gasoline supply unit, a natural gas-air intake system, a single-chip electronic control unit and sensors. The retrofit design and construction of this system enables the engine working under several modes of a) gasoline combustion only, b) natural gas combustion only and c) gasoline-natural gas dual fuel combustion, hence make it possible to combust different fuels under the best air-fuel ratio. This leads to a low exhaust gas emissions and fuel-saving.