Transcription of Modern Automotive Technology Chapter 57 - …
1 Modern Automotive Modern Automotive TechnologyTechnology Chapter 57 Chapter 57 Automatic TransmissionAutomatic TransmissionFundamentalsFundamentalsLear ning ObjectivesLearning ObjectiveszIdentify the basic components of an automatic transmission (AT)zDescribe the function and operation of the major parts of of an ATzTrace the flow of power through an ATzExplain how an AT shifts gearszCompare the different types of ATzFollow all safety rules while working on an ATAutomatic TransmissionAutomatic Transmission11. Torque Converter 12. Input Shaft 13. Clutch Assemblies14. Planetary Gear sets 15. Case 16. Output Shaft 17. Bands18. Servo Piston 19. Shift Lever 20. Oil PumpChapter 57 Chapter 571. The VALVE BODYVALVE BODY is operated by the shift lever and sensors,and controls oil flow to pistons and servos2. The PLANETARY GEARSETSPLANETARY GEARSETS provide different gear ratios and reverse gearing for an automatic transmission/transaxleValve BodyValve BodyPlanetary GearsetPlanetary GearsetCompound GearsetCompound GearsetChapter 57 Chapter 573.
2 The TORQUE CONVERTERTORQUE CONVERTER is a fluid coupling that connects and disconnects engine and The OIL PUMPOIL PUMP produces the pressure needed to operate the hydraulic components in the transmissionTorque ConverterTorque ConverterPrinciples of Torque Principles of Torque Converter OperationConverter OperationLockup Torque ConverterLockup Torque ConverterIn high gear, oil is channeled to the converter piston, locking up converterTransmission Oil PumpsTransmission Oil PumpsChapter 57 Chapter 575. The IMPELLERIMPELLER is a driving fan that produces oil movement inside the converter whenever the engine is running6. The TURBINE TURBINE is the driven fan splined to the input shaft of the automatic transmission that is driven by the energy of the oil driven by the impellerTorque ConverterTorque ConverterOverrunning ClutchesOverrunning ClutcheszUsed to hold a planetary gearset memberzOne-way roller clutch that locks in one direction and freewheels in the otherOverrunning ClutchesOverrunning ClutchesA: This action can stop movement of planetary memberB.
3 :The two races are free to turn independentlyChapter 57 Chapter 577. The INPUT SHAFTINPUT SHAFT transfers power from torque converter to internal drive members and gear The BANDS and CLUTCHESBANDS and CLUTCHES apply clamping or driving pressure on different parts of gear sets to operate themPower FlowPower FlowBandBandOne end is anchored to the caseClutch OperationClutch OperationReleasedReleased AppliedAppliedChapter 57 Chapter 579. PISTONS and SERVOSPISTONS and SERVOS actuate (move or hold) the bands and clutches to produce the different gear ratios needed to shift an automatic transmission/transaxle10. The OUTPUT SHAFTOUTPUT SHAFT transfers engine torque from the transmissions gear sets to the drive shaft, and ultimately, the rear wheelsBandsBandsClutches and PistonsClutches and PistonsOutput ShaftOutput ShaftHydraulic CircuitHydraulic CircuitAutomatic TransmissionAutomatic Transmission11.
4 Torque Converter 12. Input Shaft 13. Clutch Assemblies14. Planetary Gear sets 15. Case 16. Output Shaft 17. Bands18. Servo Piston 19. Shift Lever 20. Oil PumpLearning ObjectivesLearning ObjectiveszIdentify the basic components of an automatic transmission (AT)zDescribe the function and operation of the major parts of of an ATzTrace the flow of power through an ATzExplain how an AT shifts gearszCompare the different types of ATzFollow all safety rules while working on an AT
