Improving Cold Start and Transient Performance of Automotive Diesel Engine at Low Ambient Temperatures

Ramadhas, Arumugam Sakunthalai; Xu, Hongming

doi:10.4271/2016-01-0826

Cited by 13 publications

(11 citation statements)

References 15 publications

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“…Carbon monoxide and volatile organic compounds emissions are most sensitive to the thermal status of internal combustion engines. In the case of nitrogen oxides' emission from the engine during warm-up, low engine temperatures support low nitrogen oxides' emission [9,10,13,15,24]; however, then the effectiveness of the exhaust after-treatment system is decreased [10][11][12][13]16,[19][20][21]23]. In the event of using the catalyst after-treatment, exhaust gas purification from particulate matter is slightly delayed-therefore, the effect of combustion engine warm-up on particulate matter emission is lesser when compared to that observed for nitrogen oxides.…”

Section: Resultsmentioning

confidence: 99%

“…There is a comprehensive literature available on the subject of pollutant emissions from internal combustion engines during warm-up, e.g., [1,[9][10][11][12][13][14][15][16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

“…The results obtained confirmed an explicit increase in the emissions of carbon monoxide-CO, hydrocarbons-HC and nitrogen oxides-NOx, as well as in fuel consumption. In the study [20], pollutant emissions from a compressionignition engine were tested with the use of the NEDC and Federal Test Procedure (FTP-75). The results obtained were similar to those in [19].…”

Section: Introductionmentioning

confidence: 99%

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Influence of the Thermal State of Vehicle Combustion Engines on the Results of the National Inventory of Pollutant Emissions

et al. 2021

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The article presents the results of studies on the influence of the thermal state of vehicle combustion engines on pollutant emissions. This influence was analyzed based on data from Poland’s inventory of pollutant emissions for the years 1990–2017. The results show that during engine warm-up, carbon monoxide emission constitutes the largest share (up to 50%) in the national annual total emission. Volatile organic compounds are next in the ranking, whereas the share of nitrogen oxides is the lowest (less than 5%). Under the model traffic conditions, close to those in Poland’s cities in winter, simulation tests regarding additional pollutant emissions from passenger cars during engine warm-up were also carried out. As a result of the cold-start emissive behavior of internal combustion engines, emissions of carbon monoxide and volatile organic compounds showed a considerably greater impact on national pollutant emission, as compared to carbon dioxide, nitrogen oxides and particulate matter. This is particularly evident for the results of the inventory of pollutant emissions from road transport.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of the Thermal State of Vehicle Combustion Engines on the Results of the National Inventory of Pollutant Emissions

et al. 2021

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“…В связи с повышенными требованиями к минимальным температурам пуска ДВС автомобилей, эксплуатируемых в районах с холодным климатом, эти автомобили зачастую оборудуются автономными или неавтономными средствами облегчения пуска холодного двигателя [9,10]. Средства облегчения пуска оказывают воздействие на различные системы двигателя и, как правило, изменяют их температурное состояние [11,12].…”

Section: список литературыunclassified

Simulation of the Electric Starter System of the Internal Combustion Engine Start-Up to Study the Impact on Its Operation of the Pre-Start Battery Discharge

Zhuravsky¹,

Automobile²,

Zanin

et al. 2019

DSMM

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“…However, with the need to implement low temperature emission tests (till 27°C) in regulatory driving cycles like NEDC or FTP75, systematic and robust approaches to cold starting are needed. 5,6 It is a challenge to meet emission legislation limits and desired cold starting ability simultaneously with low CRs in diesel engines.…”

Section: Introductionmentioning

confidence: 99%

A novel method to improve the cold starting ability of a low compression ratio diesel engine through recompression of the charge

Vivegananth

Ramesh

2018

Proceedings of the Institution of Mechanical Engineers, Part D:

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Reducing the compression ratio in a diesel engine will result in lower NOx and soot emissions but will lead to problem of starting and combustion instability at cold conditions. In this work, a novel method for improving cold starting ability has been conceptualized and verified through simulations and experiments. In this method, the temperature of the charge is enhanced by ejecting the hot air into the intake manifold at the end of compression stroke. Due to the irreversibility associated with this process, the temperature of the air in the intake manifold increases and this air is again inducted into the cylinder and compressed to further augment the temperature. This cycle is repeated till the temperature at the end of compression is sufficient to autoignite the injected fuel to aid first firing. This methodology was demonstrated on a single cylinder common rail diesel engine with a compression ratio of 14:1, which indicated that the temperature in the intake manifold progressively increased by up to 75 K within 10 crank shaft rotations during cranking. In subsequent experiments with the proposed system, ignition occurred right from the second rotation, whereas there is no combustion occurred in the conventional engine at ambient conditions (28°C). However, at cold condition (10°C), partial combustion was initiated only after 15 recompression rotations and does not produce any positive work output. To mitigate this, the injection schedule was further modified such that the partially burned products were retained in the cylinder without opening the valves and recompressed which autoignited the residual fuel during the subsequent compression stroke. At the end of this compression stroke, the in-cylinder temperature and pressure were high enough and hence the fuel was again injected which resulted in sustained combustion and produced an indicated mean effective pressure (IMEP) of 6 bar that could result in starting even at cold conditions (10°C). Hence, it was demonstrated that the proposed methodology with modified valve timing and injection scheduling has the potential to start the engine at low temperatures particularly with low compression ratios.

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Improving Cold Start and Transient Performance of Automotive Diesel Engine at Low Ambient Temperatures

Cited by 13 publications

References 15 publications

Influence of the Thermal State of Vehicle Combustion Engines on the Results of the National Inventory of Pollutant Emissions

Influence of the Thermal State of Vehicle Combustion Engines on the Results of the National Inventory of Pollutant Emissions

Simulation of the Electric Starter System of the Internal Combustion Engine Start-Up to Study the Impact on Its Operation of the Pre-Start Battery Discharge

A novel method to improve the cold starting ability of a low compression ratio diesel engine through recompression of the charge

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