Jordan Journal of Civil Engineering

Emission Rate of Gases Emitted from Private Gasoline Vehicles in Irbid-Jordan


Talal M. Al-Momani; Amjad D. Al-Nasser;


In this paper, we analyze the emissions caused by private gasoline vehicles based on a random sample of 950 vehicles. Different types of pollutants; carbon monoxide (CO), carbon dioxide (CO2) and hydrocarbon (HC) were analyzed based on the Jordanian emission standards with special reference to three different vehicles' manufacturing countries; namely: Korea, Japan and Germany. The analysis results indicated that Korean made vehicles gave better results than Japanese and German made ones on superiority to pass the tests of vehicles' emission. The results indicated that at a significance value of 0.05 there was a statistical relationship between Japanese vehicles and model year, engine capacity, vehicle fuel supply system and periodic maintenance. Also, for German vehicles there was a statistical relationship between manufacturing year, fuel type and fuel supply system. However, Korean vehicles showed a statistical relationship only with the fuel supply system. Overall, all vehicles should have an injection system in order to reduce exhausts' emissions, and the vehicles should be as new as possible. It should also be recommended not to import vehicles with carburetor fuel supply system.


Environment, Air pollution, Exhaust emissions, Private gasoline vehicles, Statistical relationship, ANOVA analysis, Chi-square test, Jordan emission standards