Overview of Diesel Engine Applications for Engine System Design - Part 3: Operating and Design Characteristics of Different Applications

Xin, Qianfan

doi:10.4271/2011-01-2180

Cited by 7 publications

(3 citation statements)

References 186 publications

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“…4 Additionally, IC engines are desired to provide varying power density according to the effect of turbocharging at the same average working speed. 6,7 Herein, the mean piston speed can be considered as a characteristic design factor for durability which is related by wear rate and inertial forces. 7 Therefore, the tribological behavior of a piston becomes important in providing high efficiency and durability.…”

Section: Introductionmentioning

confidence: 99%

“…6,7 Herein, the mean piston speed can be considered as a characteristic design factor for durability which is related by wear rate and inertial forces. 7 Therefore, the tribological behavior of a piston becomes important in providing high efficiency and durability. 8 Coating the piston surface, especially the skirt and rings area, by different materials to improve the tribological features is also remarked as one of the effective method to lengthen the service life of the piston and so the life of engine Thus, it can be implied that energy consumed by friction is decreased and performance is enhanced by usage of materials having low friction coefficients and good tribological properties.…”

Section: Introductionmentioning

confidence: 99%

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The analyses of frictional losses and thermal stresses in a diesel engine piston coated with different thicknesses of thermal barrier films using co-simulation method

Bayata

Yıldız

2021

International Journal of Engine Research

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This study comparatively presents the thermal and mechanical effects of different Thermal Barrier Coatings (TBCs) and their thicknesses on the performance of aluminum diesel engine piston by combining Finite Element Analyses (FEA) and Artificial Neural Network (ANN) methods. The piston structure of MWM TbRHS 518S indirect injection six-cylinder diesel engine was modeled. The clustered TBCs (NiCrAlY–Gd2Zr2O7, NiCrAlY–MgO-ZrO2, NiCrAl–Yttria Partially Stabilized Zirconia (YPSZ), and NiCrAlY–La2Zr2O7) were implemented to the related surface of aluminum alloy piston and then static, thermal, and transient structural FEA were conducted for each model. Based on both of the temperature and equivalent stress distributions, NiCrAlY–Gd2Zr2O7 coated model displayed the best performance. Additionally, the effects of top coating thicknesses of TBCs were investigated in the range of 0.1–1.0 mm with 0.1 mm increments in FEAs. The thermally effective top coating thickness was predicted as 0.95 mm for the selected TBC using ANN method. Then the effects of coating thickness on frictional performance were revealed by generating transient structural FE models and utilizing stribeck diagram. The uncoated and 0.95 mm NiCrAlY–Gd2Zr2O7 coated models were adjusted as transient and the related crank angle – dependent in-cylinder combustion pressure data was implemented. The friction force was reduced by at least 15% in NiCrAlY–Gd2Zr2O7 coated model.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The analyses of frictional losses and thermal stresses in a diesel engine piston coated with different thicknesses of thermal barrier films using co-simulation method

Bayata

Yıldız

2021

International Journal of Engine Research

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“…The development of two-stroke engine suited for passenger cars is motivated by the reduction of the mass, the bulk and the cost of the powertrain thanks to the double combustion frequency: the number of cylinders can be reduced with a very low impact on the NVH and maintaining a high unitary displacement and thus high combustion efficiency. In addition to those advantages, two-stroke engines have also the potential of reducing engine-out NOx emissions, as pointed out by Xin [1], thanks to the natural operation of two-stroke engine with large amount of residuals gases. Indeed, this property is particularly interesting for transients because the latency inherent to a classical Exhaust Gas Recirculation system is avoided and lower NOx emissions can be thus anticipated.…”

Section: Introductionmentioning

confidence: 99%

Design of a Fuel-Efficient Two-Stroke Diesel Engine for Medium Passenger Cars: Comparison between Standard and Reverse Uniflow Scavenging Architectures

Galpin

Colliou

Laget

et al. 2017

SAE Technical Paper Series

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In spite of the increasingly stringent emission standards, the constant growth of road traffic contributes to climate change and induces detrimental effects on the environment. The European REWARD project (REal World Advanced Technologies foR Diesel Engines) aims to develop a new generation of Diesel engines complying with stricter post Euro 6 legislation and with lower CO 2 emissions. Among the different technologies developed, a fuel-efficient two-stroke Diesel engine suited for C-segment passenger cars will be designed and experimentally evaluated. One major challenge for two-stroke engines is the achievement of an efficient scavenging. As the emptying of the in-cylinder burnt gases and the filling by fresh gases is performed at the same time, the challenge consists in removing as much burnt gases as possible while avoiding the by-pass of fresh air toward the exhaust line. For the considered application, the uniflow scavenging architecture, which is featured by ports located in the bottom of the cylinder and valves in the head, is selected. Two possible arrangements for the intake and the exhaust are compared: either the standard configuration for which the intake is ensured by the ports and the exhaust by the valves or the reverse configuration. Both standard and reverse configurations are first compared through 0D system simulations, performed with LMS Imagine.Lab Amesim and then by 3D CFD simulations with CONVERGE. The standard configuration is favored, thanks to better ISFC performances, especially at low and medium loads operating conditions. In addition, the scavenging is strongly penalized for the reverse architecture due to the drag downstream the intake valves.

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Overview of Diesel Engine Applications for Engine System Design - Part 2: General Performance Characteristics

Xin¹

2011

SAE Technical Paper Series

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Overview of Diesel Engine Applications for Engine System Design - Part 3: Operating and Design Characteristics of Different Applications

Cited by 7 publications

References 186 publications

The analyses of frictional losses and thermal stresses in a diesel engine piston coated with different thicknesses of thermal barrier films using co-simulation method

The analyses of frictional losses and thermal stresses in a diesel engine piston coated with different thicknesses of thermal barrier films using co-simulation method

Design of a Fuel-Efficient Two-Stroke Diesel Engine for Medium Passenger Cars: Comparison between Standard and Reverse Uniflow Scavenging Architectures

Overview of Diesel Engine Applications for Engine System Design - Part 2: General Performance Characteristics

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