Performance of a Spark Ignition Engine Working on a Gas Fuel-Air Mixture with a Partial Injection of Liquid Spray. | ||||
| MEJ- Mansoura Engineering Journal | ||||
| Article 23, Volume 14, Issue 2, December 1989, Page 158-171 PDF (1.15 MB) | ||||
| Document Type: Research Studies | ||||
| DOI: 10.21608/bfemu.2021.172473 | ||||
 View on SCiNiTO | ||||
| Author | ||||
Salah Hassan Youssef El-Emam 
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| Associate Professor of Mechanical Power engineering Department, Faculty of Engineering, Mansoura University, Mansoura, Egypt. | ||||
| Abstract | ||||
| An experimental investigation to study the performance and the emission characteristics of a spark ignition engine operating on a natural gas-air mixture with a partial injection of liquid spray has been carried out. A light kerosene has been injected into the combustion chamber of the engine through an adopted injection system. Measurements of power output and fuel consumption as well as concentrations of CO , HC NO in the exhaust gas have been made for a range of gas-air mixture ratios and different values of injected liquid spray mass fraction. The pressure variations in the combustion chamber have been detected and recorded by a piezo type transducer and a dual channel oscilloscope respectively. The obtained results show that a partial injection of liquid kerosene into the spark ignition engine working on a natural gas-air mixture leads to improve engine performance for lean mixture ratios. The region of engine stable operation is extended by 20 – 30 percent, while the maximum power output is increased by 5 – 10 percent for constant operating conditions. This is due to the fact that the injected liquid particles will improve both volumetric efficiency and burning velocity for gas-air lean mixtures. Also, a significant reduction in the emission of the nitric oxide compared to the case without a partial injection of kerosene has been obtained. | ||||
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