|
CSME 2022/08
Volume 43 No.4
:
347-353
|
|
Performance Enhancement of Two-Stroke Spark-Ignition Engine Using High-Pressure Fuel Injection
Gopal Kumar Deshmukha, Ameenur Rehmana and Rajesh Guptaa
aDepartment of Mechanical Engineering, Maulana Azad National Institute of Technology, Bhopal, 462003, India
|
Abstract:
Two-stroke spark-ignited engines mainly suffer from the low fuel economy and high emissions. However, these compact engines do have adequate potential and provide sufficient leverage from salvaging them from going into extinction if the present methodology is adopted. This research investigates the effect of direct in-cylinder fuel injection on a two-stroke spark-ignited engine with moderate high-pressure direct injection. A conventional carburetted engine was modified for injecting gasoline from a cylinder head. The performance of the in-cylinder injection engine was superior compared to the carburetted engine. There was a significant improvement of about 20.1% in the Brake Mean Effective Pressure. The Brake Thermal Efficiency was 16.3% higher than the carburetted engine. The enhancement was due to the fine atomization and vaporization of the charge and reduced loss due to mixture short-circuiting leading to improved combustion efficiency. There was a 17% reduction in the Brake Specific Fuel Consumption as a result of the elimination of short-circuiting losses. A comparative analysis between the carburetted engine and the direct injection system showed a 27.5% reduction in the Carbon Monoxide and an 88.5% reduction in the unburned Hydrocarbon emissions due to the absence of the short-circuiting of charge.
|
|
Keywords: Direct-Injection, Scavenging, Short Circuiting, Two-Stroke.
|
Download PDF
|
|
*Corresponding author; e-mail:
|
©
2022
CSME , ISSN 0257-9731
|