1、Chonan TSTC,JATCO FRA Model,Application vehicle : MX (Atos),INTRODUCTION,General Introduction, This new automatic transaxle was developed to satisfy more smooth driving, more fast and quick shift and efficient fuel consumption. Light and compact FF type 4-speed automatic transaxle. The shifting time
2、 and hydraulic pressure is electronically controlledaccording to the throttle opening ratio, vehicle speed and it causedaccurate and sensitive shift control and convenient driving performance from low speed to high vehicle speed. Maker : JATCO (Japan Automatic Transaxle Corporation),INTRODUCTION,Gen
3、eral Specifications,INTRODUCTION,General Specifications,MECHANICAL,Section View,Low clutch,Low & reverse brake,Reverse clutch,High clutch,2-4 brake,OWC,MECHANICAL,Element,- Low clutchConnect the rear internal gear and front planetary carrier.- High clutchConnect the front planetary carrier and input
4、 shaft. It is operated at the3rd. and 4th. gear.- Low & Reverse brakeFix the front planetary carrier. It is operated at the L range 1st. gear andreverse gear. It functions engine brake at the L range.- Reverse clutchConnect the front sun gear and input shaft. It is operated at the reversegear.- OWCP
5、revent the reverse rotation of front carrier. It is operated mechanicallyregardless of hydraulic force.,MECHANICAL,Element,- Front / Rear Planetary gearThere are two simpson type planetary gear sets same as H-matic ATA.,Rear internal gear,Front internal gear,Rear sun gear,Front sun gear,Rear carrier
6、,Front carrier,MECHANICAL,Element,- 2-4 Brake & Brake servoFix the front sun gear. It is operated at the 2nd. and 4th. gear. There aretwo chambers, apply and release chamber. If the line pressure issupplied to apply chamber only, the brake is operated. But if thepressure is supplied to release chamb
7、er, the brake is not operated eventhough the pressure is also supplied to apply chamber. (Conventionaland same principle with KM and alpha, beta)- Lock-up clutchIt is built in torque converter and operated at the 3rd. or 4th. gear whenthe operating condition is satisfied.,MECHANICAL,Element,- Water
8、cooled ATF oil coolerThe water cooled built in type ATF oil cooler is installed on the AT case.,Operating Element Chart in each Gear,MECHANICAL,Power Flow - “L” range 1ST.,MECHANICAL,Low & reverse rake,Low clutch,- Low clutch : connect the rear internal gear and front carrier. - L&R brake : Fix the
9、front carrier - The input shaft RPM is higher than the output shaft RPM. - Due to the connection of clutch and brake, the engine brake functions.,Power Flow - “D, 2” range 1ST.,MECHANICAL,Low clutch,OWC,- The operating elements are nearly same as L range 1st. gear. - Rear internal gear is not fixed
10、because L&R brake is not operated. - Only clockwise direction of rear internal gear is allowed due to OWC. - The engine brake does not function.,Power Flow - 2ND.,MECHANICAL,Low clutch,2-4 brake,- Front carrier turns clockwise due to the holding of front sun gear. - Therefore front internal gear is
11、rotated more fast than 1st. gear.,Power Flow - 3RD.,MECHANICAL,Low clutch,- The rotation speed of rear sun gear and internal gear is same. - Rear planetary gear set is rotated with one unit, so the input shaft andoutput shaft will be connected directly.,High clutch,Power Flow - 4TH.,MECHANICAL,2-4 b
12、rake,High clutch,- Front sun gear is fixed and front carrier is rotated clockwise. - The rotating speed of front internal gear is higher than one of frontcarrier. - Therefore output shaft speed is higher than that of input shaft.,Power Flow - Reverse,MECHANICAL,Low & reverse rake,Reverse clutch,- Fr
13、ont carrier is fixed and front sun gear is rotated counter clockwise. - So the output shaft turns counterclockwise also.,MECHANICAL,- 2 ON/OFF solenoid valves : Shift control solenoid valve A, B - 2 PWM solenoid valves : Line pressure solenoid valve, Lock-up solenoid valve,Lock-up control solenoid v
14、alve,Solenoid Valves,Line pressure control solenoid valve,Shift control solenoid valve A,Shift control solenoid valve B,- 4 Accumulators on the valve body :The line pressure is controlled mechanically by accumulators.1) Throttle pressure accumulator2) 1-2 accumulator3) Servo release accumulator4) Lo
15、w clutch accumulator,Accumulators,1-2 accumulator / Servo release accumulator,Low clutch accumulator,Line pressure,Accumulator control pressure,Accumulator control pressure,Line pressure,MECHANICAL,MECHANICAL,The Function of Valves,- 14 hydraulic spool valves inside of valve body,MECHANICAL,The Func
16、tion of Valves,Upper Valve Body,MECHANICAL,Neutral shift valve,Throttle pressure accumulator,Shift valve A,Pressure modifier valve,Manual valve,Line pressure relief valve,Inter Valve Body,MECHANICAL,1-2 modulator valve,Neutral control valve,Lock-up control valve,Servo release timing valve,Shift valv
17、e B,Accumulator control valve,Pressure regulator valve,Pilot valve,MECHANICAL,1-2 accumulator,Servo release accumulator,Low clutch accumulator,Lower Valve Body,Lower Valve Body Oil Filter,MECHANICAL,Oil filter,Lower valve body,Inter Valve Body Check Ball Location,MECHANICAL,- 5 steel balls,Upper Val
18、ve Body Check Ball Location,MECHANICAL,- 7 steel balls,Pressure Control,HYDRAULIC,There are two kinds of hydraulic pressure to perform up shift and down shift One is line pressure and the other one is pilot pressure. The pilot pressure has a similar function with the reducing pressure in the HMC alp
19、ha and beta ATA. Basically the line pressure functions to operate each clutch and brake and it is switched by manual valve, shift control valve A, B and so on. The line pressure is controlled by pressure regulator valve and it is changed due to the operation of pressure modifier valve (Throttle open
20、ing ratio) and manual valve (Select lever position). The pilot pressure controlled by pilot valve functions to operate shift valve A, B and lock-up control valve and it is switched by shift control solenoid valve A, B and lock-up control solenoid valve.,Pressure Control,HYDRAULIC,There are two kinds
21、 of hydraulic pressure to perform up shift and down shift. One is line pressure and the other one is pilot pressure. The pilot pressure has a similar function with the reducing pressure in the HMC alpha and beta ATA. Basically the line pressure functions to operate each clutch and brake and it is sw
22、itched by manual valve, shift control valve A, B and so on.,Shift control solenoid valve A, B operation chart,Pressure Control,HYDRAULIC,The line pressure is controlled by pressure regulator valve and it is changed due to the operation of pressure modifier valve (Throttle opening ratio) and manual v
23、alve (Select lever position). The pilot pressure controlled by pilot valve functions to operate shift valve A, B and lock-up control valve and it is switched by shift control solenoid valve A, B and lock-up control solenoid valve.,Low clutch,Hydraulic centrifugal balance chamber,The Operation of eac
24、h Valve,HYDRAULIC,- Pilot Valve,This valve controls the changed line pressure to be constant according to the driving condition. The pressure which passes this valve is called pilot pressure and this pressure is applied to each chamber in shift control valve and pressure modifier valve through each
25、solenoid valve.,Pilot valve,Line pressure,Shift solenoid A, B Pressure modifier valve Line pressure solenoid valve,Drain,The Operation of each Valve,HYDRAULIC,- Pressure modifier Valve,This valve is operated by pilot pressure which is controlled by line pressure control solenoid valve. The pressure
26、which passes this valve is called modified pressure and it is connected to pressure regulator valve and accumulator control valve. Due to this valve and pilot valve, the line pressure is changed according to the driving condition.,Pilot valve,Pilot pressure,Pressure regulator valve Accumulator contr
27、ol valve,Pilot pressure (from line pressure solenoid),Modifier pressure,The Operation of each Valve,HYDRAULIC,- Servo release timing valve,When upshift from 2nd gear to 3rd gear, or downshift from 4th gear to 3rd gear, this valve controls the releasing timing of 2-4 brake servo piston release chambe
28、r. Also the line pressure on Low clutch and High clutch also is controlled simultaneously by this valve.,Low clutch,2-4 brake servo release chamber,From shift valve,High clutch,Servo release timing valve,The Operation of each Valve,HYDRAULIC,- Accumulator control valve,This valve controls the pressu
29、re which is applied on each accumulators and is operated by the pilot pressure which is controlled by pressure modifier valve.,Accumulator control valve,Line pressure,To each accumulator,Accumulator control pressure,Modifier pressure,The Operation of each Valve,HYDRAULIC,- Neutral Control Valve,To a
30、bsorb the surging line pressure to the Low clutch, Neutral control valve and Low clutch accumulator has been installed.,TCM,Vehicle speed,Oil temperature,Over drive signal,Shift switch signal,TPS,Turbine speed,Engine speed,A/CON signal,Shift control solenoid valve A,Shift control solenoid valve B,Li
31、ne pressure control solenoid valve,Lock-up control solenoid valve,MIL request,Electronic Control Block Diagram,ELECTRICAL,Mutual Communication,ELECTRICAL, MIL request- Frequency : 1Hz- Request : 85% ON duty signal from TCM to ECM- No request : 50% ON duty signal from TCM to ECM,Lock-up Control,0 20
32、40 60 80 100 120 140,1 7/8 6/8 5/8 4/8 3/8 2/8 1/8 0,Throttle opening angle,Vehicle speed (km/h),4th gear lock-up ON,4th gear lock-up OFF,3rd gear lock-up ON,3rd gear lock-up OFF,ELECTRICAL,Lock-up Control,ELECTRICAL, Lock-up clutch engaging condition- 3rd. or 4th. gear- Below condition should be sa
33、tisfied. Lock up signal- Frequency : 10ms- Lock up engagement : 80% ON duty signal from TCM to ECM- Lock up release : 50% ON duty signal from TCM to ECM,Shift Pattern (1.0 MPI),34,0 20 40 60 80 100 120 140,1 7/8 6/8 5/8 4/8 3/8 2/8 1/8 0,Throttle opening angle,Vehicle speed (km/h),23,12,12,23,34,ELE
34、CTRICAL,Sensors & Actuators,ELECTRICAL, Turbine speed sensorThis sensor has a same function of PG-A in alpha, beta ATA.The output signal is a analog and it istransmitted to TCM for change the optimalshift control. It detects the spline portion ofinput shaft and generates the pulseaccording to the tu
35、rbine speed.- 1 Period : 1/12 rev.- Internal resistance : 540k (20),Turbine speed sensor,Reverse clutch,ELECTRICAL,Sensors & Actuators, ATF temperature sensorTo detect the ATF temperature, this sensor is installed on the valve body. If the ATF temperature is below 20, over drive (4th. gear) is not a
36、vailable.- Internal resistance (approximatevalue) : negative thermister type2.5k at 200.33k at 500.17k at 80,ATF temperature sensor,Valve body, Shift switch (Inhibitor switch / Transaxle range switch)- Check the continuity,Sensors & Actuators,ELECTRICAL,- Solenoid valves,ELECTRICAL,Sensors & Actuato
37、rs,* Internal resistance ( at 20)Shift control solenoid valve A, B : 25Lock-up pressure control solenoid valve : 13Line pressure control solenoid valve : 2.9(Between solenoid terminal and body ground / solenoid terminaland ground return line),- Ground return line,Line pressure solenoid valve,Valve body,Ground return line,TCM,ELECTRICAL,Sensors & Actuators,DTC & Fail safe,ELECTRICAL,ELECTRICAL,DTC & Fail safe,BASIC CHECK,Specification for Hydraulic pressure,N range D range : 0.8 sec N range R range : 0.8 sec,Specification for Time Lag Test,Unit : kPa (kgf/cm2),BASIC CHECK,
