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The influence of ambient temperature on exhaust emissions during cold start in the homologation test
1
Environment Protection Centre, Motor Transport Institute, Poland
2
Faculty of Management,, Lublin University of Technology, Poland
3
-, Motor Transport Institute, Poland
4
Centre for Material Testing and Mechatronics, Motor Transport Institute, Poland
5
Faculty of Operation and Economics of Transport and Communications, UNIVERSITY OF ŽILINA, Slovak Republic
Submission date: 2025-05-19
Final revision date: 2025-06-22
Acceptance date: 2025-06-25
Online publication date: 2025-07-12
Publication date: 2025-11-14
Corresponding author
Magdalena Zimakowska-Laskowska
Environment Protection Centre, Motor Transport Institute, Jagiellońska 80, 03-301, Warszawa, Poland
Environment Protection Centre, Motor Transport Institute, Jagiellońska 80, 03-301, Warszawa, Poland
Combustion Engines 2025,203(4), 50-58
KEYWORDS
TOPICS
ABSTRACT
The cold start phase in an ICE is susceptible to changing environmental conditions, especially ambient temperature. The work aimed to analyse the influence of different thermal conditions on the concentration of pollutants and operating parameters of the drive unit during a cold start. The tests were conducted on a chassis dynamometer at various ambient temperatures. The same homologation cycle was used in both cases, allowing direct comparison of results. The concentrations of HC, CH₄, CO₂ and NOx were recorded, as well as the basic operating parameters of the engine: coolant temperature, rotational speed, load and throttle position. Based on empirical data, mathematical models describing the influence of ambient temperature on the dynamics of emissions and stabilisation of engine operation were developed. Relationships were identified that allow for assessing the time to reach steady-state conditions as a function of starting temperature. The results of the analysis provide the basis for developing a start control strategy in climatically variable conditions. They can support the development of adaptive emission control systems compliant with current and future legal standards.
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CITATIONS (2):
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TRANSBALTICA XVI: Transportation Science and Technology
Alfredas Rimkus, Edward Kozłowski, Magdalena Zimakowska-Laskowska, Jonas Matijošius, Piotr Wiśninowski
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