Diesel Engine Cold Starting: Combustion Instability

Henein, Naeim A.; Zahdeh, Akram; Yassine, Mahmoud K.; Bryzik, Walter

doi:10.4271/920005

Cited by 51 publications

(29 citation statements)

References 7 publications

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“…Studies performed on climatic chambers ( [3,8,9,10]) have certainly delivered valu-able information but several measurement uncertainties and the incapability of using extra diagnostic tools have prevented from making a detailed explanation of this combustion process. Laget et al [6] show a more systematic approach to the problem in which in-cylinder analysis, endoscopic visualization and CFD modeling are coupled in order to identify the pre-glowing glow plug duration, nozzle tip protrusion, injector spray angle and cranking speed as key parameters with influence on startability.…”

Section: Introductionmentioning

confidence: 99%

Ignition and combustion development for high speed direct injection diesel engines under low temperature cold start conditions

Pastor

García-Oliver

Ramírez-Hernández

2011

Fuel

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Visualization results show that pilot ignition occurs in the vicinity of the glow plug, and strongly influences main combustion initiation. Main combustion starts from the pilot flame, and propagates to the rest of the combustion chamber showing a strong visible reaction zone. After end of main injection, the rapid leaning of the mixture suppresses the strong radiation, and OH radiation is observed to progress to the rest of the combustion chamber. The combustion process shows a strong scattering, which has been quantified

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Section: Introductionmentioning

confidence: 99%

Ignition and combustion development for high speed direct injection diesel engines under low temperature cold start conditions

Pastor

García-Oliver

Ramírez-Hernández

2011

Fuel

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“…[12][13][14][15][16]. Concerning the third phase, the combustion stability plays an important role [17][18][19] since it strongly affects to the speed variation that is evidenced in the curve, after the engine starts. The analysis of the combustion process during this phase is in the scope of the present study.…”

Section: Methodsmentioning

confidence: 99%

Investigation of Diesel combustion using multiple injection strategies for idling after cold start of passenger-car engines

Payri

Broatch

Salavert

et al. 2010

Experimental Thermal and Fluid Science

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“…Although "highly transient" in nature, cold and hot starting events will not be discussed in this article. This is partly not only due to article length issues but also because starting is characterized by some unique combustion and friction phenomena (Henein et al, 1992) that differentiate its operation from the usual speed or load-change transient pattern.…”

Section: Introductionmentioning

confidence: 99%

Review of Some Methods for Improving Transient Response in Automotive Diesel Engines through Various Turbocharging Configurations

Giakoumis

2016

Front. Mech. Eng.

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Turbocharged diesel engines suffer from worse transient performance than their naturally aspirated counterparts, mostly at low loads and speeds. This leads to overshoot in engine-out exhaust emissions (primarily particulate matter/soot and NOx) after a speed or load increase, as well as poor drivability. The main cause for this problematic behavior is located in the turbocharger in the form of high moment of inertia and unfavorable aerodynamic-type compressor flow characteristics. In the present work, various alternative turbocharging configurations are reviewed that have proven successful in improving the dynamic diesel engine operation. These configurations are combined supercharging, variable-geometry turbine, electrically assisted turbocharging, two-stage series and sequential turbocharging, and lower turbine moment of inertia. Significant improvement in the engine's transient response can be realized when designing for smaller turbocharger frames or applying more than one units (in series or parallel arrangement). Increasing the available turbine torque (e.g., through elevated turbine back pressure in a variable-geometry turbine) is another successful option, as well as enhancement of the boost pressure (e.g., through the use of a positive displacement compressor upstream of the turbocharger). Finally, the use of external energy (e.g., in the form of electrical assistance on the turbocharger shaft during the critical turbocharger-lag phase) is another recently developed and highly promising measure to mitigate the drawbacks of the poor transient performance of turbocharged diesel-engined vehicles and limit their exhaust emissions. The choice of the "best" configuration for a specific application depends on many parameters, such as cost, matching procedure, control system, and mainly type of engine and drive cycle of the vehicle.

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Diesel Engine Cold Starting: Combustion Instability

Cited by 51 publications

References 7 publications

Ignition and combustion development for high speed direct injection diesel engines under low temperature cold start conditions

Ignition and combustion development for high speed direct injection diesel engines under low temperature cold start conditions

Investigation of Diesel combustion using multiple injection strategies for idling after cold start of passenger-car engines

Review of Some Methods for Improving Transient Response in Automotive Diesel Engines through Various Turbocharging Configurations

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