Abstract
The exhaust emissions of a four-cylinder four-stroke petrol engine have been measured. Tests have been conducted at engine speeds ranges from 1000 to 4000 rpm and at air intake pipe diameters of 20, 25, 30, 35, 40 and 63 mm. The results demonstrate that the concentrations of the hydrocarbon (HC) and that of the carbon monoxide (CO) are relatively high at small air intake pipe diameter of 20 mm and at low engine speed of about 1000 rpm. Both pollutants have a minimum at large air intake pipe diameter of about 63 mm and at high engine speed of about 4000 rpm. The exhaust emissions HC and CO increase also as the ambient pressure decreases and as the altitude of the engine increases. The values of carbon dioxide (CO2) and the oxygen (O2) remain relatively constant at a wide range of different operating conditions. Therefore the knowledge about the effect of the above parameters could lead to improve the emission control technology as well as the engine performance on engine development and design.
Zusammenfassung
In diesem Beitrag sind Ergebnisse der Messungen von Abgasemissionen eines 4-Zylinder-4-Takt Benzinmotors in Abhängigkeit von unterschiedlichen Ausführungen des Luftansaugstutzens dargestellt. Die Messungen wurden in einem Drehzahlbereich von 1000 bis 4000 min-1 und für einen Durchmesserbereich von 20 bis 63 mm des Luftansaugstutzens ausgeführt. Im Bereich kleiner Abmessungen des Ansaugstutzens und geringer Drehzahlen weist der Gehalt an Kohlenwasserstoffen und Kohlenmonoxid in den Abgasen ein Maximum auf, während für grosse Abmessungen und hohe Drehzahlen ein Minimum dieser Werte vorliegt. Mit abnehmendem Umgebungsdruck ist ebenfalls eine Zunahme der Abgasemissionen festzustellen. Die Anteile an Kohlendioxid und Sauerstoff bleiben hingegen in einem weiten Bereich der Versuchsparameter weitgehend konstant. Die vorliegenden Ergebnisse ermöglichen eine weitere Verbesserung der Abgastechnologie und der allg. Leistungscharakteristik von Verbrennungsmotoren.
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Shannak, B., Damseh, R. & Alhusein, M. Influence of air intake pipe on engine exhaust emission. Forsch Ingenieurwes 70, 128–132 (2005). https://doi.org/10.1007/s10010-006-0022-8
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DOI: https://doi.org/10.1007/s10010-006-0022-8