Development of a Biogas Fuel Supply System for an Internal Combustion Engine

ABSTRACT

A supply system of dual biogas/gasoline is proposed for a small spark ignited internal combustion (SIIC) engine. This work comprehends the design, manufacturing and testing of the fuel supply system, including the devices to maintain the constant engine speed at all loads. For the development of the carburetor—mixing device, the authors have employed a mathematical model to optimise its geometry, with the aim of reducing the pressure losses and maintaining an adequate fuel/air ratio. Moreover, this work shows the experimental results carried out at Institute of Internal Combustion Engines—at Universidad Nacional de Ingeniería (UNI) in Peru, using a 6 kW, one cylinder, stationary engine. With respect to original gasoline engine, with the biogas fired engine, the team was able to achieve a drastic reduction in toxic emissions.