文档介绍：1. Hydraulic Fundamentals
2. Torque Converter
BASIC THEORY
Chonan TSTC
CONTENTS
Up to this point, the basic mechanics of the KM170 were highly emphasized. Now that gears and frictional units have been thoroughly discussed, it’s time to investigate the hydraulic systems of the transaxle. These systems or circuits are very important for correct operation of the transaxle. Without the hydraulic circuits present in the transaxle, none of ponents bine to produce motion, nor could the transaxle function automatically. The transaxle is lubricated, cooled, shifted and connected to the engine by means of a fluid. Without hydraulic oil in the transaxle, none of these tasks could be performed satisfactorily. Therefore, it is imperative to learn the basics of hydraulic fundamentals before clutch and band application or hydraulic charts can be investigated thoroughly. 90% of all automatic transaxle failures can be diagnosed using hydraulic charts. If the understanding of hydraulic fundamentals is plete, then these charts would be of little value to the service technician.
HYDRAULIC FUNDAMENTALS
In the early seventeenth century, Pascal, a French scientist, discovered the hydraulic lever. Through controlled laboratory experiments, he proved that force and motion could be transferred by means of a confined liquid. Further experimentation with weights and pistons of varying size, Pascal also found that mechanical advantage or force multiplication could be obtained in a hydraulic pressure system, and that the relationships between force and distance were exactly the same as with a mechanical lever.
From the laboratory data that Pascal collected, he formulated Pascal’s Law, which states : “Pressure on a confined fluid is transmitted equally in all directions and acts with equal force on equal areas.” This law is a plex pletely understand as it stands right now. The following illustrations and explanations break down each concept and discuss them thoroughly enough for easy unders