Effect of Water Injection in Acetylene-Diesel Dual Fuel DI Diesel Engine

Gaseous fuels are good alternative fuels to improve the energy crisis of today’s situation due to its clean burning characteristics. However, the incidence of backfire and knock remains a significant barrier in commercialization. With the invention of latest technology, the above barriers are eliminated. One such technique is timed injection of water into the intake port. In the present investigation, acetylene was aspirated in the intake manifold of a single cylinder diesel engine, with a gas flow rate of 390 g/h, along with water injected in the intake port, to overcome the backfire and knock problems in gaseous dual fuel engine. The brake thermal efficiency and emissions such as NO_x, smoke, CO, HC, CO₂ and exhaust gas temperature were studied. Dual fuel operation of acetylene induction with injection of water results in lowered NO_x emissions with complete elimination of backfire and knock at the expense of brake thermal efficiency.