The Diesel Engine as an  Important Component for  CO2 Fleet Target Achievement

Mitterecker, Horst; Wieser, Martin; Weißbäck, Michael; Wancura, Hannes

doi:10.1007/s38313-018-0043-3

Cited by 5 publications

(1 citation statement)

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“…In the past few years several papers and book chapters about electrical coolant pumps for passenger cars have been published, e.g. [2][3][4][5][6]. Regarding the subject of electrical coolant pumps for long-haul trucks less papers can be found in the literature, e.g.…”

Section: Introductionmentioning

confidence: 99%

Assessment of an electrical coolant pump on a heavy-duty diesel engine

Kiesenhofer¹

2021

SN Appl. Sci.

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Hybridization of the drive train in commercial vehicles is a key solution toward meeting the strict future requirements to reduce carbon dioxide emissions within the European Union. In order to decrease fleet consumption a large number of different hybrid systems are already available in series in the passenger car sector. Due to the cheap and powerful 48 volt hybrid components and the lower hazard potential compared to high voltage, future commercial vehicles could also benefit from the 48V technology and contribute to lower fleet fuel consumption. Therefore, a complete 48V mild hybrid system was built on the diesel engine test bench as part of a research project. This paper highlights the utilization of a powerful 48V-motor to propel the coolant pump on a diesel engine of the 13-L commercial vehicle class. Three different drive variants of the coolant pump were implemented and measured on the diesel engine test bench. MATLAB®/Simulink®-simulations were conducted to assess the possible fuel savings in three different driving cycles. This paper provides a summary and interpretation of the measurement and simulation results. The simulation studies predict a decrease of fuel consumption of up to 0.94%. Furthermore, the additional advantages of electrified coolant pumps based on 48V are discussed.

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Section: Introductionmentioning

confidence: 99%

Assessment of an electrical coolant pump on a heavy-duty diesel engine

Kiesenhofer¹

2021

SN Appl. Sci.

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Analysis of the NOx storage behaviour during cold start of modern SCR flow-through substrates and SCR on-filter substrates

Lukas¹,

Maurer²,

Gert³

et al. 2021

Automot. Engine Technol.

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Selective catalytic reduction (SCR) systems are the state-of-the-art technology to reduce nitrogen oxide emissions (NOx) of modern diesel engines. The system behaviour is well understood in the common temperature working area. However, the system properties below light-off temperature are less well known and offer a wide scope for further investigations. Vehicle measurements show that under specific conditions during cold start, NOx can be partially stored and converted on on-filter and flow-through SCR catalysts. The purpose of this work was in a first step to analyse the main influence parameters on the NOx storage behaviour. Therefore, synthetic gas test bench measurements have been carried out, varying the gas concentrations, temperature, and gas hourly space velocity (GHSV). These investigations showed that the NOx storage effect strongly depends on the NH3 level stored in the catalyst, GHSV, the adsorbed water (H2O) on the catalyst, and the temperature of the catalyst. Further influence parameters such as the gas composition with focus on carbon monoxide (CO), short-chain hydrocarbons and long-chain hydrocarbons have been analysed on a synthetic gas test bench. Depending on operating conditions, a significant amount of NOx can be stored on a dry catalyst during the cold start phase. The water vapor from the combustion condenses on the cold exhaust pipe during the first seconds, or up to a few minutes after a cold start. As the water vapor reaches the surface of the catalyst, it condenses and adsorbs onto it, leading to a sudden temperature rise. This exothermal reaction causes the stored NOx to be desorbed, and furthermore it is partially reduced by the NH3 stored in the catalyst.

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Experimental study on the energy consumption of gasoline engine lubricating pumps in standardized driving cycles

Liu

Zhai

2020

Mechanics Based Design of Structures and Machines

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The Diesel Engine as an Important Component for CO2 Fleet Target Achievement

Cited by 5 publications

References 0 publications

Assessment of an electrical coolant pump on a heavy-duty diesel engine

Assessment of an electrical coolant pump on a heavy-duty diesel engine

Analysis of the NOx storage behaviour during cold start of modern SCR flow-through substrates and SCR on-filter substrates

Experimental study on the energy consumption of gasoline engine lubricating pumps in standardized driving cycles

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