Download Free The Role Of Engine Oil Viscosity In Low Temperature Cranking And Starting Book in PDF and EPUB Free Download. You can read online The Role Of Engine Oil Viscosity In Low Temperature Cranking And Starting and write the review.

The Role of Engine Oil Viscosity in Low Temperature Cranking and Starting, Volume 10 presents the methods for measuring the low temperature viscosity of engine oils that would correlate with the Coordinating Research Council (CRC) engine test results. This book discusses the historical background, technical progress, and the role of engine oil viscosity in low temperature cranking and starting of engines. Organized into 18 chapters, this volume starts with an overview of the importance of oil viscosity in cold starting. This text then discusses the major effects and other factors that play a part in cold starting, including oil viscosity, oil pumpability, battery condition, fuel volatility, ignition efficiency, engine clearances, and starter motor characteristics. Other chapters consider the progress in motor oil whereby multiple viscosity graded oils are capable of meeting two of more SAE viscosity grades that introduced some technical problems. The final chapter deals with the development of a reciprocating viscometer. Automotive engineers will find this book useful.
It has long been established, that the majority of wear that occurs in an engine occurs at start-up. The reason for this is that engine oil normally resides in the crankcase and must be pumped to certain areas of the engine for it to serve its purpose of lubrication. Before the oil is pumped, the engine must be cranked, or started, to engage the oil pump that transfers the engine oil. Out of necessity, the lubricant industry has studied the low-temperature cranking and pumping properties of engine oil. The result has been the creation of an engine oil viscosity classification, SAE J300, which includes requirements for winter viscosity performance. Yet, these requirements are for new engine oils. Limited published research seems to be available with respect to these same oils once they are in service in an engine for an extended amount of time. The goal of this paper will be to evaluate the low-temperature cranking and pumping properties of used engine oils. To evaluate these properties, in-service engine oil samples will be evaluated using the cold cranking simulator and the mini rotary viscometer, because of the vast amount of industry experience with these tests while evaluating oils against SAE J300 classification requirements. These tests will be employed while evaluating numerous used engine oil samples collected from various applications. The big question is whether or not the aging and contamination that engine oils experience dramatically alter low-temperature cranking and pumping properties.