| PARTICLE NUMBER IN SMALL SI ENGINE USING GASOLINE AND
LPG AS FUEL FOR NON-ROAD VEHICLE |
| Jinyoung Jang 1, Youngjin Shin 1, Ahyun Ko 1, Yongjin Jung 1, Youngmin Woo 1, Chongpyo Cho 1, Gangchul Kim 1, Youngdug Pyo 1, Myunghoon Han 2 |
1Energy Efficiency Research Division, Korea Institute of Energy Research
2Blueplanet |
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| ABSTRACT |
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This study measured the particle number (PN) emissions from spark ignition (SI) engines according to the use
of gasoline fuel and liquefied petroleum gas (LPG) fuel for particles greater than 23 nm or 5 nm. A 0.8-L two-cylinder
gasoline engine, which has variable valve timing system and electronic control unit, was used in the experiment. The engine
was operated at 1500 rpm, 3000 rpm, low load, and high load, and the fuel injection timing, intake valve opening timing,
exhaust valve closing timing, and valve overlap period were used as variables in the experiment. According to the
experimental results, the gasoline engine emitted particulate matter (PM) is in the range of 1 × 109 to 3 × 1013 #/kWh, whereas
that of the LPG engine is in the range of 1 × 109 to 1 × 1011 #/kWh. For the LPG engine, the operating conditions and
experimental variables had minimal influence on the PN, whereas for the gasoline engine, the experimental conditions and
experimental variables had a significant influence on the PN. For this test engine, the ratio of PM smaller than 23 nm
increased as the emissions of PM larger than 23 nm decreased, which were observed for values between 1 × 1010 #/kWh and
1 × 1011 #/kWh. |
| Key Words:
Small SI engine, Gasoline, Liquefied petroleum gas (LPG), Injection timing, Valve timing, Particle
number (PN), Non-road vehicle |
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Corresponding Author.
Jinyoung Jang , Email. 
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