We were able to identify engine blow-by as a primary factor affecting camshaft wear in gasoline engines. Using a 2.3-liter overhead-camshaft engine, we isolated the valve-train oil from the crankcase oil and its blow-by using a separated oil sump. We find that: Later studies identified nitric acid as a primary cause of camshaft wear. It is derived from nitrogen oxides reacting with water in the blow-by. But even in the presence of blow-by, camshaft wear can be controlled by the proper selection of zinc dithiophosphates (ZnDTP) and detergent type.
Gasoline-Engine Camshaft Wear: The Culprit is Blow-By
Sae Technical Papers
1989 SAE International Fall Fuels and Lubricants Meeting and Exhibition ; 1989
1989-09-01
Conference paper
English
Gasoline-engine camshaft wear:The culprit is blow-by
Automotive engineering | 1989
|Camshaft Surface Temperatures in Fired-Gasoline Engines
SAE Technical Papers | 1990
|'Green' fuel engine-failure culprit
Online Contents | 1994
Electric Camshaft Phasing System to Meet Euro 6/BS-VI Emission Norms for Gasoline Engine
British Library Conference Proceedings | 2019
|