Design and manufacture of engines would be greatly simplified if operating conditions were predetermined and uniform. Some applications approach this ideal: constant speed and load, infrequent shutdowns, and controlled ambient conditions. Even then, the engine has to be started at least once. The lubrication system is one of many engine systems expected to perform under a variety of conditions; starting and operating an engine in sub-zero temperatures is particularly demanding.
This paper presents details of a design process, outlined in
Likewise, network simulation and test results are discussed with particular attention afforded pressure control valves, oil filters, and their interaction during cold ambient operation.
A typical lubrication system that was studied by these methods is the system for the John Deere 400 Series engine. A schematic of the system is shown in