Evaluation of Engines in Passenger Cars and Light Duty Vehicles: Correlation of Test Results Between Testbed and Road Testing Under Sub Zero Conditions

1994 ◽  
Author(s):  
Hubertus Lemke
Keyword(s):  
Test Results ◽  
Passenger Cars ◽  
Light Duty ◽  
Road Testing ◽  
Light Duty Vehicles

Recent evidence concerning higher NOx emissions from passenger cars and light duty vehicles

2011 ◽  
Vol 45 (39) ◽  
pp. 7053-7063 ◽  
Author(s):  
David C. Carslaw ◽  
Sean D. Beevers ◽  
James E. Tate ◽  
Emily J. Westmoreland ◽  
Martin L. Williams
Keyword(s):  
Nox Emissions ◽  
Passenger Cars ◽  
Light Duty ◽  
Light Duty Vehicles

Development of the Worldwide Harmonized Test Procedure for Light-Duty Vehicles

2015 ◽  
Vol 2503 (1) ◽  
pp. 110-118 ◽  
Author(s):  
Biagio Ciuffo ◽  
Alessandro Maratta ◽  
Monica Tutuianu ◽  
Konstantinos Anagnostopoulos ◽  
Georgios Fontaras ◽  
...  
Keyword(s):  
Carbon Dioxide Emissions ◽  
Test Procedure ◽  
Test Results ◽  
Test Cycle ◽  
Test Procedures ◽  
United Nations Economic Commission ◽  
Vehicle Performance ◽  
Light Duty ◽  
Economic Commission ◽  
Light Duty Vehicles

To assess vehicle performance on criteria compounds, carbon dioxide emissions, and fuel energy consumption, laboratory tests are generally carried out. During these tests, a vehicle is driven on a chassis dynamometer (which simulates the resistances the vehicle encounters during its motion) to follow a predefined test cycle. In addition, all conditions for running a test must strictly adhere to a predefined test procedure. The procedure is necessary to ensure that all tests are carried out in a comparable way, following the requirements set by the relevant legislation. Test results are used to assess vehicle compliance with emissions limits or to evaluate the fuel consumption that will be communicated to customers. Every region in the world follows its own approach in carrying out these types of tests. The variations in approaches have resulted in a series of drawbacks for vehicle manufacturers and regulating authorities, leading to a plethora of different conditions and results. As a step toward the harmonization of the test procedures, the United Nations Economic Commission for Europe launched a project in 2009 for the development of a worldwide harmonized light-duty test procedure (WLTP), including a new test cycle. The objective of the study reported here was to provide a brief description of WLTP and outline the plausible pathway for its introduction in European legislation.

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