One of the main subjects in automotive industries is to enhance the efficiency of internal combustion engines. Wear between cylinder and ring is one of the major parameters reducing the engine perform....
The objective of this work was to develop an experimental system to support development and validation of a model for the lubrication of two-piece Twin-Land-Oil-Control-Rings (hereafter mentioned as T....
Presented within the framework of this SAE Technical Paper are the highly accurate results of friction experiments, performed upon a floating-liner, single-cylinder test engine with a capacity 0.5 lit....
Downsized gasoline engines for passenger cars requiring low CO₂ emissions trend to lightweight designs using AlSi material for crankcases. For ultra-low vehicle fuel consumption a low friction and lig....
Concerns over greenhouse gas emissions are driving governments and the automotive industry to seek out ways of reducing vehicle CO₂ emissions. Engine friction reduction is one means of reducing CO₂ em....
The continued rise in specific power output and thermal loading characteristics of the modern automotive diesel engine provides piston engineers and scientists with the challenge of continually improv....
In the past decades, continuous improvement to the finishing process (honing) of cylinder liner has led to a considerable reduction in engine friction, wear and oil consumption via optimization of the....
The largest contribution to engine rubbing friction is made by the piston and piston rings running in the cylinder liner. The magnitude and characteristics of the friction behaviour and the influence ....
The first-ever application of a hydrogen-free diamond-like carbon (H free DLC) coating to a mass-production gasoline engine reduces friction between the cylinder bore and piston by 18%. It is explaine....
Nowadays, the use of numerical simulations is an important tool in order to optimize the engine and components behaviors, directly contributing to the emissions and lead-time development project reduc....
Concerns over greenhouse gas emissions are driving governments and the automotive industry to seek out ways of reducing vehicle CO₂ emissions. Engine friction reduction is one means of reducing CO₂ em....
This SAE Technical Paper contains detailed data which are relevant for the calculation of the friction forces of the piston assembly in internal combustion engines. Useful ways of employing calculatio....
Piston ring radial pressure effects both the manufacturability of the ring as well as its performance in the engine. While lack of radial contact can cause increased blow-by and lubricant oil consumpt....
A twin-land oil control ring (TLOCR) model is used to evaluate TLOCR friction and the results are compared to the experiment measurement in a single cylinder floating liner engine under motoring condi....
Due to the current federal requirements for increasing vehicle fuel economy, more engineering resources are allocated to the up-front analysis with the purpose of increasing vehicle fuel economy. Engi....
