Transient Diesel Emissions: Analysis of Engine Operation During a Tip-In

Hagena, Jonathan; Filipi, Zoran; Assanis, Dennis N.

doi:10.4271/2006-01-1151

Cited by 126 publications

(114 citation statements)

References 2 publications

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“…Markle and Brown (1996) and Zervas et al (2005) found that advanced technologies could treat and reduce the emissions from on-road and off-road vehicles. Hagena et al (2006) found that the improvements in engine technologies included engine design, quality of combustion, fuel spray angle, and atomization of fuel by high pressure injection as well as advanced technologies for fuel formulations and after-treatment.…”

Section: Introductionmentioning

confidence: 99%

The effect of dynamic operating conditions on nano-particle emissions from a light-duty diesel engine applicable to prime and auxiliary machines on marine vessels

Lee¹,

Jeong²

2012

International Journal of Naval Architecture and Ocean Engineeri

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ABSTRACT:This study presents the nano-sized particle emission characteristics from a small turbocharged common rail diesel engine applicable to prime and auxiliary machines on marine vessels. The experiments were conducted under dynamic engine operating conditions, such as steady-state, cold start, and transient conditions. The particle number and size distributions were analyzed with a high resolution PM analyzer. The diesel oxidation catalyst (DOC) had an insignificant effect on the reduction in particle number, but particle number emissions were drastically reduced by 3 to 4 orders of magnitude downstream of the diesel particulate filter (DPF) at various steady conditions. Under high speed and load conditions, the particle filtering efficiency was decreased by the partial combustion of trapped particles inside the DPF because of the high exhaust temperature caused by the increased particle number concentration. Retarded fuel injection timing and higher EGR rates led to increased particle number emissions. As the temperature inside the DPF increased from 25 o C to 300 o C, the peak particle number level was reduced by 70% compared to cold start conditions. High levels of nucleation mode particle generation were found in the deceleration phases during the transient tests.

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Section: Introductionmentioning

confidence: 99%

The effect of dynamic operating conditions on nano-particle emissions from a light-duty diesel engine applicable to prime and auxiliary machines on marine vessels

Lee¹,

Jeong²

2012

International Journal of Naval Architecture and Ocean Engineeri

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“…NOx and particle emissions are increased when engine load and/or speed are changed rapidly compared to constant load situation [3]. Rapid and continuous changes of engine loading are typical for mobile machines like excavator, forest harvesters, and wheel loaders for example.…”

Section: Introductionmentioning

confidence: 99%

“…The moderate hybrid design can filter rapid load changes. Hagena et al [3] showed that the change of the rise time of the load transient from 1 sec to 5 sec diminish totally the NOx and PM emission peaks caused by the transients. Therefore, we can say that the moderate design of hybrid storage should reduce both NOx and PM emissions, although it does stabilize the engine load completely.…”

Section: Figure 6: Determination Of Delivered Hybrid Powermentioning

confidence: 99%

Emission reduction of mobile machines by hydraulic hybrid

Tikkanen

Koskela

Ahola

et al. 2017

Linköping Electronic Conference Proceedings

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Emission regulations of the mobile machines have created lot of work for the machine manufacturers in recent years because of the Stage 4 /Tier 4 final regulations. The work will continue because the new EU stage 5 emission regulations for non-road-mobile-machines was published at the year 2016. Emission reduction is realized by different emission reduction systems that are located in the exhaust system in combination with sophisticated combustion control. The after treatment systems increase complexity and size of the exhaust system. Increased creation of NOx and particle emissions are related to sudden load and speed changes of the engine. This paper introduces effect of driving style on the real emissions of the municipal tractor and solutions to decrease emissions with hydraulic hybrid. Measurements show that the sudden load changes increase raw NOx and particle emissions (non after-treated emissions) and operators driving style has effect on the emissions. Stabilizing the load of the engine by the hybrid system reduces NOx and particle generation. When the engine load variation is minimized the size of the exhaust after treatment systems can be reduced.

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“…Further simulation-based methods for deriving these maps at steady-state engine operation have been extensively reported in the literature [9][10][11][12]. These efforts have been valuable in understanding steady-state operation, and optimizing fuel economy and emissions in recent years [13]. Transient engine operation, however, constitutes the largest segment in actual engine operation compared to the steady-state one [14].…”

Section: Introductionmentioning

confidence: 99%

Optimal Engine Calibration for Individual Driving Styles

Malikopoulos¹,

Assanis²,

Papalambros³

2008

SAE Technical Paper Series

Self Cite

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Increasing functionality of electronic control units has enhanced our ability to control engine operation utilizing calibration static maps that provide the values of several controllable variables. State-of-the-art simulation-based calibration methods permit the development of these maps with respect to extensive steady-state and limited transient operation of particular driving cycles. However, each individual driving style is different and rarely meets those test conditions. An alternative approach was recently implemented that considers the derivation of these maps while the engine is running the vehicle. In this approach, a self-learning controller selects in real time the optimum values of the controllable variables for the sequences of engine operating point transitions, corresponding to the driver's driving style. This paper presents a quantitative assessment of the benefits in fuel economy and emissions, derived from employing a self-learning controller for optimal injection timing in a diesel engine. The engine is simulated over transient operation in response of a hypothetical driver's driving style.

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Transient Diesel Emissions: Analysis of Engine Operation During a Tip-In

Cited by 126 publications

References 2 publications

The effect of dynamic operating conditions on nano-particle emissions from a light-duty diesel engine applicable to prime and auxiliary machines on marine vessels

The effect of dynamic operating conditions on nano-particle emissions from a light-duty diesel engine applicable to prime and auxiliary machines on marine vessels

Emission reduction of mobile machines by hydraulic hybrid

Optimal Engine Calibration for Individual Driving Styles

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