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Influence of non‑commercial fuel supply systems on small engine SI exhaust emissions in relation to European approval regulations


[ 1 ] Instytut Konstrukcji Maszyn, Wydział Inżynierii Mechanicznej, Politechnika Poznańska | [ 2 ] Instytut Silników Spalinowych i Napędów, Wydział Inżynierii Lądowej i Transportu, Politechnika Poznańska | [ P ] employee

Scientific discipline (Law 2.0)

[2.7] Civil engineering, geodesy and transport
[2.9] Mechanical engineering

Year of publication


Published in

Environmental Science and Pollution Research

Journal year: 2022 | Journal volume: vol. 29 | Journal number: iss. 37

Article type

scientific article

Publication language


  • small SI engine
  • exhaust emissions
  • non-road
  • fuel injection
  • LPG
  • CNG

EN The development and operation of road infrastructure require machines and equipment driven by low-powered internal com- bustion engines. In this study, we conducted emission tests on five small spark-ignition engines. We used the most popular commercial design on the market, the Lifan GX 390, with a carburettor power system, and another commercial power unit, the Honda iGX 390, with an innovative power system characterised by an electronically controlled carburettor flap. The remaining three tested constructions were proprietary solutions modernising the design of the Lifan GX 390 engine: one had an electronic injection and ignition system powered by gasoline, whereas the other two had systems powered by alterna- tive fuels. Emission tests were conducted under identical operating conditions on an engine dynamometer complying with European Union guidelines (Regulation 2016/1628/EU). The results of the tests showed that the innovative solutions in most cases reduced CO, CO2 and hydrocarbon emissions but increased NOx compounds.

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1 - 16




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