A Simplified Methodology for the Analysis of the Cylinder Liner Bore Distortion: Finite Element Analyses and Experimental Validations

Barbieri, Saverio Giulio; Giacopini, Matteo; Mangeruga, Valerio; Bianco, Luigi Lo; Mastrandrea, Luca Nicolò

doi:10.4271/2019-24-0164

Cited by 11 publications

(5 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The reduction in friction and possible oil consumption result in overall lowered CO 2 and oil-related emissions. Furthermore, the reduced wear of the lowered friction supports less energy consumption in the manufacturing process [10].…”

Section: Discussionmentioning

confidence: 99%

“…The free-form liner has a maximum cylindrical deviation of 0.025 mm radial and a lateral deviation of 0.12 mm radial. To produce the developed form, a method was developed at the Institute of Manufacturing Technology and Machine Tools, enabling the creation of a machined free form during a machining step with an innovative machining tool [10]. The reference cylinder liner was manufactured close to series production.…”

Section: Design Development Of a Free Form Honed Linermentioning

confidence: 99%

“…Additionally, this can lead to oil entry into the combustion chamber (reverse blow-by) and it is one reason for higher emissions. Conversely, a tighter sealing results in a higher friction force [5][6][7][8][9][10][11][12][13][14][15][16]. As part of the "Powertrain 2025" project [17], cylinder liners are being developed to reduce energy consumption in both manufacturing and operational phases.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental Investigation of a Free-Form Honed Cylinder Liner for Heavy-Duty Engines

Stelljes,

Pohlmann-Tasche,

Dinkelacker

2024

Lubricants

View full text Add to dashboard Cite

For future internal combustion engines, driven by regenerative fuels, efficiency is more important than ever. One approach to reduce the losses inside the piston cylinder unit (PCU) is to improve the alignment of the liner and the piston. Therefore, a cylinder liner with a free form was developed at the Institute of Technical Combustion (ITV) of the Leibniz University Hannover which compensates radial and linear deformations along the stroke. The layout is based on a FEM simulation. The liner was manufactured by the Institute of Production Engineering and Machine Tools (IFW) of Leibniz University of Hannover with a novel turn-milling process. The liner was investigated on the heavy-duty Floating-Liner engine of ITV with a displacement of 1991 ccm and a bore diameter of 130 mm. The experimental results show improvement in the friction losses over the whole engine map in the range of 9% and up to 17.3% compared to a serial liner. Sealing efficiency could be improved up to 28.8%, depending on the operational point. Overall, the investigation aims for lower fuel consumption which would in result fewer emissions.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Design Development Of a Free Form Honed Linermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental Investigation of a Free-Form Honed Cylinder Liner for Heavy-Duty Engines

Stelljes,

Pohlmann-Tasche,

Dinkelacker

2024

Lubricants

View full text Add to dashboard Cite

show abstract

“…Javanmardi and Rezvani [20] used a CFD study to predict the thermal boundary conditions that were applied to the cylinder liner segment by segment. In order to examine the deformation of a cylinder liner, Barbieri et al [21] conducted a simplified finite element analysis on a turbocharged eight-cylinder V-type four-stroke engine, with each cylinder having a displacement volume of 487.5 cm 3 . Liu et al [22] calculated the temperature and the heat transfer coefficient of a piston crown using analytical equations while performing a thermomechanical analysis of the piston.…”

Section: Introductionmentioning

confidence: 99%

An Analysis of Mechanical and Thermal Stresses, Temperature and Displacement within the Transparent Cylinder and Piston Top of a Small Direct-Injection Spark-Ignition Optical Engine

Velugula,

Thiruvallur loganathan,

Varadhaiyengar

et al. 2023

Energies

View full text Add to dashboard Cite

Two- and three-wheeled vehicles account for a significant portion of the automobile market in several countries worldwide. In order to advance the capabilities of these vehicles, the integration of direct-injection (DI) technology is essential, given its potential benefits such as high thermal efficiency and low engine-out emissions. Direct injection in small-bore engines, however, further complicates the challenges involved (of DI technology) like fuel impingement and mixture inhomogeneity inside the engine cylinder, driving the need for an in-depth exploration of in-cylinder processes. Consequently, the necessity arises to develop a small-bore direct-injection spark-ignition (DISI) optical engine that incorporates a transparent cylinder and piston top. In this scenario, these transparent components are required to endure a combination of intricate loads and boundary conditions, hence the potential to result in failures. This work aims to assess numerically the effects of these loads and boundary conditions on the transparent components and optimize their thicknesses. For this purpose, a computer-aided design model of a small-bore DISI optical engine (displacement volume of 200 cm3) is developed. The mechanical and thermal loads are extracted from the experimental data and validated computational fluid dynamics model of the same engine configuration. A coupled temperature-displacement finite element analysis methodology is developed in ABAQUS/CAE, and simulations are performed under both steady and transient conditions. Temperature and combined stress distributions within the transparent cylinder and piston top are obtained and analyzed to find their optimum thicknesses. Knowing thermal gradients, combined stresses and displacements under actual conditions helped design the small optical engine with an improved factor of safety.

show abstract

“…With increasingly stringent non-road emissions norms [11], the thermal and mechanical loads acting on the parts in diesel engines in direct contact with gas become increasingly greater, requiring sufficiently durable engine structures [12]. Due to the pre-tightening force of the cylinder head bolt, the thermal load and the piston side force, the cylinder liner is prone to irregular out-of-round deformation.…”

Section: Introductionmentioning

confidence: 99%

Analysis of out-of-round deformation of a dry cylinder liner of a non-road high-pressure common-rail diesel engine based on multi-field coupling

Wang

Luo

et al. 2021

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

The deformation of cylinder liner directly affects the sealing performance of the friction components in internal combustion engines, resulting in high oil consumption, engine power loss, and high-particulate matter emissions. Previous research works focused more on deformation of the wet vehicular cylinder liners, however, the effects of different loads on the dry liner deformation is not clear yet. A non-road high-pressure common-rail diesel engine was selected as the research object, and a coupled model of the engine was developed based on fluid-solid coupled heat transfer theory. After the accuracy of the model was verified by temperature measurement of the cylinder head and cylinder liner, deformation of the dry cylinder liner was studied. The results show that the axial and radial deformations of the cylinder liner are not uniform under the bolt preload condition. Large deformation occurs at the first liner and fourth liner, with the maximum deformation occurring at the top of fourth liner for 10.14 μm. Under the condition of thermal load, the temperature of cylinder liner exhibits a distribution of three-segments from the top to bottom. The liner deformation is not uniform, and the maximum deformation occurs at the top of the fourth liner for 304 μm. The radial deformations of all four cylinder liners present a symmetrical structure of a "heart" shape with respect to the centerline of the second and third cylinders. The axial deformation of each liner exhibits a "barrel" shape which is convex in the middle and narrow at the two ends.

show abstract

A Simplified Methodology for the Analysis of the Cylinder Liner Bore Distortion: Finite Element Analyses and Experimental Validations

Cited by 11 publications

References 15 publications

Experimental Investigation of a Free-Form Honed Cylinder Liner for Heavy-Duty Engines

Experimental Investigation of a Free-Form Honed Cylinder Liner for Heavy-Duty Engines

An Analysis of Mechanical and Thermal Stresses, Temperature and Displacement within the Transparent Cylinder and Piston Top of a Small Direct-Injection Spark-Ignition Optical Engine

Analysis of out-of-round deformation of a dry cylinder liner of a non-road high-pressure common-rail diesel engine based on multi-field coupling

Contact Info

Product

Resources

About