Experimental Investigations on Performance and Emissions of Spark Ignition Engine | Chapter 3 | Technological Innovation in Engineering Research Vol. 4

Goal: In addition to seriously endangering human health, internal combustion engine exhaust pollutants also disrupt the environment. Studies were conducted to assess the performance of a four-stroke, single-cylinder, variable-compression-ratio engine with copper coating [CCE, copper-(thickness, 300 m) coated on piston crown and inner side of cylinder head] equipped with catalytic converter and sponge iron as catalyst using various test fuels, including neat gasoline, gasohol (80 percent gasoline and 20 percent ethanol by volume), and methanol blended gasoline.

Study Design: Brake thermal efficiency, compression ratio, and speed performance characteristics (BTE), Different quantities of brake mean effective pressure were combined with variations in exhaust gas temperature (EGT) (BMEP).

Methodology: Using various BMEP values, the exhaust emissions of carbon monoxide (CO) and unburned hydrocarbons (UBHC) were measured. A catalytic converter utilising sponge iron and manganese ore as catalysts was included with the engine. The catalytic converter might be injected with air if necessary. The effectiveness of the catalysts was contrasted with one another.

Brief outcomes: Gasohol improved the thermal efficiency of the brakes in both engine configurations. With both test fuels, CCE demonstrated improved performance as compared to CE. With increasing compression ratio and just slightly increasing engine speed, brake thermal efficiency increased. With both types of engines, gasoline containing methanol successfully reduced exhaust emissions as compared to gasoline. With various test fuels, the catalytic converter with air injection considerably decreased emissions on both engine designs.

Author(s) Details:

M. V. S. Murali Krishna,

Mechanical Engineering Department, Chaitanya Bharathi Institute of Technology, Gandipet, Hyderabad- 500 075, India.

Ch. Indira Priyadarshni,

Mechanical Engineering Department, Chaitanya Bharathi Institute of Technology, Gandipet, Hyderabad- 500 075, India.

Ipsita Mohanthi,

Mechanical Engineering Department, Chaitanya Bharathi Institute of Technology, Gandipet, Hyderabad- 500 075, India.

K. N. V. Sridevi,

Mechanical Engineering Department, Chaitanya Bharathi Institute of Technology, Gandipet, Hyderabad- 500 075, India.

Please see the link here: https://stm.bookpi.org/TIER-V4/article/view/7308