A Hybrid Combustion Control Strategy for Heavy Duty Diesel Engines Based on the Technologies of Multi-Pulse Injections, Variable Boost Pressure and Retarded Intake Valve Closing Timing

Yu, Wenbin; Liu, Bin; Li, Yang; Su, Qingpeng; Pei, Yiqiang; Su, Weifeng

doi:10.4271/2011-01-1382

Cited by 11 publications

(11 citation statements)

References 23 publications

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“…In order to solve the problems in LTC engines above mentioned, some advanced technologies have been employed and investigated, such as advanced injection strategies, higher boost pressures, lower compression ratio, and EGR control strategy [18][19][20][21][22]. Among these technologies, the change of fuel properties is one of important and effective methods to realize low temperature combustion.…”

Section: Introductionmentioning

confidence: 98%

Experimental study on diesel conventional and low temperature combustion by fueling four isomers of butanol

Zheng

Liu

et al. 2015

Fuel

164

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Section: Introductionmentioning

confidence: 98%

Experimental study on diesel conventional and low temperature combustion by fueling four isomers of butanol

Zheng

Liu

et al. 2015

Fuel

164

View full text Add to dashboard Cite

“…The investigations presented in [10,11] also indicate a reduction of the emission of particulate matter; (b) The results of the investigations presented in [12,13] indicate an improvement in the fuel combustion and consequently a reduction of the fuel consumption through fuel dose division (as compared to a single fuel dose injection); (c) From the investigations presented in [9] results the dependence of the NO x emission from the size of the first fuel dose: a large pilot fuel dose increases the homogeneity of the charge and a reduction of the NO x emission can be obtained through a delay of the injection of the main fuel dose. In a situation when the injection angle of the first fuel dose was increased by 20°-25°a lower emission of HC and CO was observed; (d) Literature analysis [8,13] is related to an engine fitted with an exhaust recirculation system. During the engine operation less oxygen is supplied with the intake air and the fuel dose division results in better mixing of fuel and air inside the cylinder.…”

Section: Introductionmentioning

confidence: 86%

Combustion process shaping by use of different strategies of multiple fuel injection in a CI model engine

Pielecha

Borowski

Czajka

et al. 2014

J Therm Anal Calorim

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Technological advancement in combustion systems of diesel engines triggers the need of fulfilling many contradictory requirements. Among those are such issues as maintenance of environmental standards in terms of the exhaust emissions with a simultaneous preservation of the thermodynamic properties of the combustion process and fuel consumption. The paper discusses the results of research on the influence of the strategies of fuel dose division on the combustion process and operational indexes in a model engine. The paper also contains an exhaust gas analysis conducted with the use of a rapid compression machine. The investigations of the combustion process (development of the self-ignition spots) were conducted using high speed camera. The recorded images related to the period from the onset of the injection to the beginning of the appearance of combustion spots have also been analyzed. The following have been varied: number of doses, size of doses, dwell times and excess air coefficient. The authors performed a comparative analysis of the thermodynamic indexes of the combustion process obtained from the indicator tracings. The achieved results show possibilities of the influencing on the combustion process course and emission of exhaust toxic compounds by application of multiple injection and its properly selected strategy containing proportions in fuel doses and dwell times between them.

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“…With the development of diesel engines, many advanced combustion strategies have been introduced in the past decades such as homogeneous charge compression ignition (HCCI), partially premixed combustion (PPC), and reactivity controlled compression ignition (RCCI), high density-low temperature combustion (HD-LTC). 1–8 And the main attention has been paid to the steady-state of the engine. However, some researchers have revealed that the transient conditions contribute more to engine emissions.…”

Section: Introductionmentioning

confidence: 99%

Study on transient emission spikes reduction of a heavy-duty diesel engine equipped with a variable intake valve closing timing mechanism and a two-stage turbocharger

Zhou

Liu

Sun

et al. 2018

International Journal of Engine Research

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The overall performance and emission during a speed/torque versus time transient cycle are investigated in a heavy-duty truck engine equipped with an intake valve closing timing mechanism and a two-stage turbocharger system (high-pressure turbine is variable geometry turbine). The performance discrepancy analysis between steady-state and transient operation is completed based on a fairly optimized steady-state baseline. The result shows that during the transient operation, the transient NOx emission can track the steady-state baselines much better than particle matter, and the cumulative NOx in transients is even lower than the cumulative NOx of the steady-state baselines, while the rising particle matter emissions mainly due to appearance in particle matter emission spikes during the cycle. And the transient particle matter spikes appeared almost in two typical transient conditions: sharp acceleration from idling and abrupt load transients. The instantaneous equivalence ratio (F) is found to be the main physical factor governing particle matter spikes formation in transients. Particle matter spikes become prominent when F cannot track the steady-state baseline well or F rises over a critical value of 0.8. The control strategy of intake valve closing timing mechanism-variable geometry turbine-exhaust gas recirculation to bridge the gap of F between the steady-state and the transients has been established, which effectively cut down the emission spikes, reducing particle matter emissions by 32.9% with almost no change in NOx.

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A Hybrid Combustion Control Strategy for Heavy Duty Diesel Engines Based on the Technologies of Multi-Pulse Injections, Variable Boost Pressure and Retarded Intake Valve Closing Timing

Cited by 11 publications

References 23 publications

Experimental study on diesel conventional and low temperature combustion by fueling four isomers of butanol

Experimental study on diesel conventional and low temperature combustion by fueling four isomers of butanol

Combustion process shaping by use of different strategies of multiple fuel injection in a CI model engine

Study on transient emission spikes reduction of a heavy-duty diesel engine equipped with a variable intake valve closing timing mechanism and a two-stage turbocharger

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