This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Tribology of Commercial Engines
Published June 05, 1997 by Verlag Des Verein Deutscher Ingenieure GmbH in Germany
Operating and investment cost, reliability, durability and environmental compatibility of commercial vehicles are strongly influenced by the driving engine. For economical operation, low fuel and oil consumption as well as high reliability and durability are required. These targets are influenced by the engine's tribology in an important manner: high amounts of fuel energy are necessary to cover the friction losses of the engine; wear and damages often occur as direct results of unfavorable lubrication.
This paper presents different methods to analyze the friction losses. Measures for component optimization will be discussed.
Frequently the lubrication system is oversized in capacity. Oil network and pump can be adjusted to the real oil requirements and optimized by CAE tools.
The contribution of the crankcase ventilation to the engine's emissions can be reduced utilizing today's technological state of the art. Suitable oil separators and ventilation concepts will be presented which significantly limit the oil consumption induced by the crankcase ventilation