Effect of piston geometry design and spark plug position on the engine performance and emission characteristics

Quoc Dang Tran; Thanh Nhu Nguyen; Vinh Nguyen Duy; Quoc Dang Tran; Thanh Nhu Nguyen; Vinh Nguyen Duy

doi:10.3934/energy.2023009

AIMS Energy

2023, Volume 11, Issue 1: 156-170. doi: 10.3934/energy.2023009

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Research article

Effect of piston geometry design and spark plug position on the engine performance and emission characteristics

1.
School of Mechanical Engineering, Hanoi University of Science and Technology, Hanoi, Vietnam
2.
Faculty of Automotive Engineering Technology, Dai Nam University
3.
Faculty of Vehicle and Energy Engineering, Phenikaa University

Received: 18 October 2022 Revised: 30 January 2023 Accepted: 15 February 2023 Published: 22 February 2023

This paper investigates the influence of piston geometry design and spark plug position on the engine performance and emission characteristics at a range of speeds from 1200 rpm to 2200 rpm. Accordingly, the parameters of the indentation depth, the spark plug position, the location of the recess, and the engine's compression ratio are changed and evaluated. The concave center depth improved the mixture of air and fuel, increased power, and reduced fuel consumption. The power can be improved by up to 3% when the piston top recess is 25 mm. In addition, within a limited range, the combustion process and the engine's power and emission characteristics are enhanced when the engine's compression ratio rises. Increasing the depth of the depression on the top of the piston improves fluid flow in the cylinder, resulting in increased power, fuel efficiency, and emissions; however, the improvement between the indentations remains unclear.
- combustion chamber geometry,
- squish flow,
- center-bowl,
- converted CNG engine,
- piston bowl geometry
Citation: Quoc Dang Tran, Thanh Nhu Nguyen, Vinh Nguyen Duy. Effect of piston geometry design and spark plug position on the engine performance and emission characteristics[J]. AIMS Energy, 2023, 11(1): 156-170. doi: 10.3934/energy.2023009

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Abstract

This paper investigates the influence of piston geometry design and spark plug position on the engine performance and emission characteristics at a range of speeds from 1200 rpm to 2200 rpm. Accordingly, the parameters of the indentation depth, the spark plug position, the location of the recess, and the engine's compression ratio are changed and evaluated. The concave center depth improved the mixture of air and fuel, increased power, and reduced fuel consumption. The power can be improved by up to 3% when the piston top recess is 25 mm. In addition, within a limited range, the combustion process and the engine's power and emission characteristics are enhanced when the engine's compression ratio rises. Increasing the depth of the depression on the top of the piston improves fluid flow in the cylinder, resulting in increased power, fuel efficiency, and emissions; however, the improvement between the indentations remains unclear.

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