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Design and analysis of multi fuel injector (part 4)

The gas injector optimized the injection rate, injector momentum, injector internal geometry, and injector nozzle. The researchers modeled the injector using the Bond graph modeling technique. They also conducted simulation studies for the dynamic behavior study. Deyang [8] filed his invention as patent WO 2013/188247, whose outcome was the utilization of single and multi-fuel injection with pressure intensification and variable orifice using gasoline and diesel.

The research leveraged the different fuel properties and variable spray patterns. The invention was extended to the analysis of low viscosity fuels, including ethanol, LNG, and high viscosity fuels, including biodiesel, Jet Propellant -8 (JP-8) fuel.The literature review revealed the lack of a sustained investigation in the simulation analysis of fuel injectors. Hence, thorough research needs to be done in the design of a multi-fuel universal gas injector for combustion equipment, including IC engines, gas burners, furnaces, and gas turbines, which have the ability to inject various liquid and gaseous fuels based on the local availability.

The main objective of the current research is to design, model, and simulate a multi-fuel injector which can function using various fuels adaptable for different combustion equipment. The injector should be capable of producing the required power, adequate torque, and lower fuel consumption. They should also be capable of injecting the required quantity of the fuel at a specific time, especially during the suction stroke or during the compression stroke. The injection is also dependent on the location of the injector at the manifold or at the engine head for direct injection.

A fuel injector is a device that is used to inject or spray the fuel into the combustion equipment for the preparation of the stoichiometric air-fuel mixture, thereby providing efficient combustion. The fuel injector is the heart of the fuel injection system. Based on the advancement of technology, various fuel injection arrangements exist based on the application requirement which includes, throttle body injection, MPF (Multi-point fuel) injection, Manifold injection, Port injection, and direct injection.