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Engine exhaust gas emissions from non-road mobile machinery

effects of transient load conditions

Lindgren, Magnus (2004). Engine exhaust gas emissions from non-road mobile machinery. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae. Agraria, 1401-6249 ; 481
ISBN 91-576-6753-5
[Doctoral thesis]

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Non-road mobile machinery is used for a range of different operations with varying engine load characteristics. Fuel consumption and emission amounts from such machinery are dependent on the operation performed. The engine load during many of the operations performed is largely transient in nature. However, the majority of fuel consumption and emission data reported in the literature are based on static measurements and engine load patterns not representative of the real use of the vehicle. Emission data derived from the average annual use of agricultural tractors, based on three different typical areas of use, were compared with emission data obtained from European and international standards. The results showed that the emission amounts obtained from the engine load cycles stipulated in European and international emissions regulations were not representative of the real use of non-road mobile machinery. Furthermore, operations can be performed using a variety of different approaches depending on factors such as vehicle characteristics and driver behaviour. An engine load simulation model was developed and the results from the simulations showed that by using different driving strategies or transmission characteristics, it was possible to affect the emissions for a specific operation without affecting the fuel consumption or duration of the operation. Changes in engine speed and torque, i.e. transients, are likely to affect the fuel consumption and formation of emissions due to periods of time lags in e.g. the fuel injection system or the boost pressure. During normal operations a decrease in the fuel efficiency due to transient loads was detected. The fuel consumption increased with up to 13% compared with the corresponding steady-state condition. In order to study the effects of transients, special transient test cycles were developed. At high transients, both in engine speed and torque, the effects on fuel consumption and emissions were substantial. For example emissions of particulate matter increased with up to twelve times. Based on these results, a mathematical model was developed that could derive transient fuel consumption and emission amounts for all types of operations using a limited amount of emission measurements.

Authors/Creators:Lindgren, Magnus
Title:Engine exhaust gas emissions from non-road mobile machinery
Subtitle:effects of transient load conditions
Series Name/Journal:Acta Universitatis Agriculturae Sueciae. Agraria
Year of publishing :September 2004
Number of Pages:60
ALLI. Hansson, P.-A. Lindgren, M. Norén, O. (2001). A comparison between different methods of calculating average engine emissions for agricultural tractors. Journal of Agricultural Engineering Research 80 (1), 37-43 doi:10.1006/jaer.2001.0710 II. Lindgren, M. Hansson, P.-A. (2002). Effects of engine control strategies and transmission characteristics on the exhaust gas emissions from an agricultural tractor. Biosystems Engineering 83 (1), 55 –65, doi:10.1006/bioe.2002.0099 III. Hansson, P.-A. Lindgren, M. Nordin, M. Pettersson, O. (2003). A methodology for measuring the effects of transient loads on the fuel efficiency of agricultural tractors. Applied Engineering in Agriculture, 19(3), 251-257 IV. Lindgren, M. Hansson, P.-A. (2004). Effects of transient conditions on exhaust emissions from two non-road diesel engines. Biosystems Engineering, 87(1), 57-66, doi:10.1016/j.biosystemseng.2003.10.001 V. Lindgren, M. Hansson, P.-A. Effects of transient conditions on particulate matter emissions from a non-road diesel engine. (Submitted to Transactions of the ASAE) VI. Lindgren, M. A transient fuel consumption model for non-road diesel engines. (Submitted to Biosystems Engineering)
Place of Publication:Uppsala
ISBN for printed version:91-576-6753-5
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:T Pollution > T01 Pollution
N Machinery and buildings > N20 Agricultural machinery and equipment
Subjects:Not in use, please see Agris categories
Agrovoc terms:engines, air pollution, waste gases, tractors, farm equipment, diesel oil, efficiency, consumption, mathematical models
Keywords:engine, emission, exhaust gas, non-road mobile, agricultural tractors, construction equipment, transient, steady-state, diesel, fuel efficiency
Permanent URL:
ID Code:644
Department:(NL, NJ) > Department of Biometry and Engineering
Deposited By: Magnus Lindgren
Deposited On:29 Sep 2004 00:00
Metadata Last Modified:02 Dec 2014 10:06

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