Friction Power Measurements of a Fired Gasoline Engine Influence of Piston Skirt Geometry
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In addition to technologies such as partial powertrain electrification, a key factor in the reduction of CO2 emissions from road traffic is an increase in the efficiency of combustion engines through lower frictional losses. Tests carried out by Mahle show significant potential in this area by optimizing the design parameters of the piston group. This article focuses on the design of the piston skirt geometry, specifically the parameters of piston skirt contact area, piston skirt stiffness, and piston profile.
Friction Power Measurements of a Gasoline Engine
Systematic frictional loss measurements in a passenger car gasoline engine were used to investigate interactions between various design features of the piston group and the resulting frictional losses under real engine operation. For some features, a comparison can also be made with the corresponding measurements of a passenger car diesel engine [1, 2]. This article expands on the previous investigations and focuses on the design...
The authors express their thanks to Andreas Hammen, Mahle GmbH, for managing the project and providing support for the test runs.