TY - JOUR

T1 - Experimental Investigation of a Free-Form Honed Cylinder Liner for Heavy-Duty Engines

AU - Stelljes, Frederik

AU - Pohlmann-Tasche, Florian

AU - Dinkelacker, Friedrich

PY - 2024/4/16

Y1 - 2024/4/16

N2 - 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.

AB - 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.

KW - cylinder liner

KW - floating liner

KW - friction

KW - heavy duty

KW - honing

KW - internal combustion engine

KW - piston group

KW - tribology

UR - http://www.scopus.com/inward/record.url?scp=85191696192&partnerID=8YFLogxK

U2 - 10.3390/lubricants12040132

DO - 10.3390/lubricants12040132

M3 - Article

AN - SCOPUS:85191696192

VL - 12

JO - Lubricants

JF - Lubricants

SN - 2075-4442

IS - 4

M1 - 132

ER -