Ring Pack for Downsized Spark Ignition Engines

2011-36-0157

10/04/2011

Event
SAE Brasil 2011 Congress and Exhibit
Authors Abstract
Content
Downsized engines are considered one major technical trend to attend the demands for CO₂ and fuel consumption reduction. Usually this engine configuration consists of displacements between 0.9L and 1.2L with 3 or 4 cylinders, usually associated with turbo charge. The increased load due to high gas pressures and power density may affect the PCU components, specially the piston rings.
This work reviews the ring pack used on the current downsized engines from European and NAFTA OEMs. The different ring designs and materials used on downsized engines are discussed. The specific challenges that those engines present to piston rings and the available alternatives are discussed.
An extreme low friction, under development, ring pack was tested in a 1.2L Turbo downsized engine. With low friction, a low tangential force ring pack, the main issue was control of Lube Oil Consumption. The use of an innovative Oil Control Ring design enable the ring pack to present similar levels of Lube Oil Consumption than the current production with almost 60% reduction on the ring pack load.
Meta TagsDetails
DOI
https://doi.org/10.4271/2011-36-0157
Pages
9
Citation
de Sá, L., and Ferrarese, A., "Ring Pack for Downsized Spark Ignition Engines," SAE Technical Paper 2011-36-0157, 2011, https://doi.org/10.4271/2011-36-0157.
Additional Details
Publisher
Published
Oct 4, 2011
Product Code
2011-36-0157
Content Type
Technical Paper
Language
English