Effect of LPG gas fuel injectors on the properties of low emission vehicles

• Autorzy: Majerczyk A. , Radzimirski S.
• Języki publikacji: EN

Abstrakty

EN

Modern spark-ignition engines used for the propulsion of low emission vehicles are fuelled by injection systems in which the fuel is individually metered to each cylinder by a single injector (multipoint injection). For the proper engine operation, it is necessary that the injectors are similar to each other and stable in respect of the fuel dosage during the whole engine operation. This requirement is satisfactorily met by petrol injectors used by OEM. In contrast to petrol injectors, gas injector used in LPG-fuelled vehicles, in particular for the retrofit, are still in the development phase and therefore their quality and production consistency are often regarded as unsatisfactory from the standpoint of view of the proper engine operation. The injector-to-injector variation in the fuel dosage results in air-fuel mixture maldistribution in the cylinders, which, in turn, affects vehicle emission characteristics. The paper presents results of an investigation of inconsistency of gas injectors used in LPG vehicles in respect of their dosage. The method of measurement of the dosage uniformity is described. On the basis of the measurement, three sets of injectors differing in respect of injector-to-injector variation were selected for further vehicle tests. Tests were conducted on a passenger Euro 4 car. The emissions of limited pollutants were measured over the NEDC type-approval cycle and cycle's representative for the real world driving under Polish driving conditions. The paper presents results of the conducted tests and discusses the effect of injector-to-injector variation on the pollutant emissions.

Słowa kluczowe

EN

road transport; liquid fuels; LPG; combustion engines; air pollution; environmental protection

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2012
• Tom: Vol. 19, No. 4
• Strony: 401--410
• Opis fizyczny: Bibliogr. 4 poz., rys.

Twórcy

autor

Majerczyk A.

autor

Radzimirski S.

• Motor Transport Institute Environment Protection Centre Jagiellońska Street 80, 03-301 Warsaw, Poland tel.: [phone] fax:[phone],

Bibliografia

• [1] Majerczyk, A., Radzimirski, S,. Taubert, S., Określenie emisji zanieczyszczeń z niskoemisyjnych silników spalinowych pojazdów samochodowych w rzeczywistych warunkach eksploatacji, grant Nr 9.0816.
• [2] Majerczyk, A., Merkisz, J., Taubert, S., The assessment of LPG/gasoline fuelled spark ignition engine properties in real driving, Proceedings of the international conference Silniki Gazowe, 2006.
• [3] Majerczyk, A., Taubert, S., Estimation problems of pollutants emission from the vehicles exhaust system in the real road traffic conditions, Proceedings of the International Conference KONES 2007.
• [4] Majerczyk, A., Radzimirski, S,. Taubert, S., Analiza porównawcza parametrów pracy, w szczególności właściwości ekologicznych, samochodów zasilanych LPG i benzyną ITS report 6037/COŚ, 2011.