1997 MERCEDES-BENZ ML430 torque

Fig. 56: Planetary Gear Set, Function (1 Of 5)
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Operation - The ring gear (1) and sun gear (3) elements of a planetary gear system are alternately driven and
braked by the actuating elements of the multi-plate clutch and multiple-disc brake. See .Fig. 56
The planet gears
(2) can turn on the internal gearing of the ring gear (1) and on the external gearing of the sun gear (3). This
allows for a variety of gear ratios and the reversal of the rotation direction without the need for moving gear
wheels or shift collars.
The torque and speed are converted corresponding to the lever ratios or the ratio of the number of teeth on the
driven to the driving gears and is known as the gear ratio i. The overall ratio of a number of planetary gear sets
connected in series is obtained by multiplying the partial ratios. When two components of the planetary gear set
are locked together, the planetary gear set is locked and turns as a closed unit.
Advantages Of A Planetary Gear Set:
Shifting Ability Under Load
Several Ratios Can Be Produced
Constant Meshing Of The Gears
Simple Direction Reversal
High Efficiency
Coaxial Location Of Input And Output
Compact Design
The Following Basic Ratio Possibilities Can Be Realized
See Fig. 57
.
Sun Gear Locked
Ring Gear Driving
Planet Gears Driven
Relatively Low Step-Down Ratio

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:26 PMPage 103 © 2006 Mitchell Repair Information Company, LLC.

Via the selector scheme symbols (87) the alternative selector lever positions and their sequence are shown
symbolically.
Location/Task/Design/Function Of PWM Solenoid Valve, Torque Converter Lockup Clutch

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:27 PMPage 111 © 2006 Mitchell Repair Information Company, LLC.

Fig. 62: Torque Converter Lockup PWM Solenoid Valve
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMI SSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:27 PMPage 112 © 2006 Mitchell Repair Information Company, LLC.

Torque Converter Lockup PWM Solenoid Valve, Location

In the supporting body of the electrical control unit (Y3/6) and pressed against the valve housing of the
shift plate (2a) by means of a leaf spring (2c). See Fig. 62
.
Torque Converter Lockup PWM Solenoid Valve, Task

The PWM solenoid valve for the torque converter lockup (Y3/6y6) controls the pressure for the torque
converter lockup clutch.
Torque Converter Lockup PWM Solenoid Valve, Design

See TORQUE CONVERTER LOCKUP PWM SOLENOID VALVE, DESIGN
.
Torque Converter Lockup PWM Solenoid Valve, Function

it converts a pulse-width-modulated current actuated by the ETC control module (N15/3) into the
corresponding hydraulic pressure KUB (p-S/KUB).
Torque Converter Lockup PWM Solenoid Valve, Design

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:27 PMPage 113 © 2006 Mitchell Repair Information Company, LLC.

Fig. 63: Torque Converter Lockup Clutch PWM Solenoid Valve, Design
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Structure - The torque converter lockup PWM solenoid valve (Y3/6y6) is sealed off to the valve body of the
shift plate (2a) by an O-ring (34) and a seal (arrow). See Fig. 63
. The contact springs (32) on the PWM
converter lockup solenoid valve (Y3/6y6) engage in a slot in the conductor tracks (33). The force of the contact
spring (32) ensures safe contacts.
Modulating Pressure Regulating Solenoid Valve, Location/Task/Design/Function

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:27 PMPage 115 © 2006 Mitchell Repair Information Company, LLC.

Lubricates and cools the mechanical part of the transmission, and limits the pressure in the torque
converter.
Lubrication Pressure Regulating Valve, Function

See LUBRICATION PRESSURE REGULATING VALVE, FUNCTION
.
Lubrication Pressure Regulating Valve, Function
Operation - At the working pressure regulating valve (22) surplus oil is diverted to the lubrication pressure
regulating valve (23), from were the lubrication pressure (p-Sm) is used in regulating amounts to supply the
transmission lubrication system including the torque converter. See Fig. 76
.
Fig. 76: Lubrication Pressure Regulating Valve, Function

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:27 PMPage 135 © 2006 Mitchell Repair Information Company, LLC.

Fig. 78: Overlap Regulating Valve, Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Torque Converter Lockup Clutch Regulating Valve, Location/Task/Function
Fig. 79: Torque Converter Lockup Clutch Regulating Valve, Location/Task/Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Torque Converter Lockup Clutch Regulating Valve, Location

In the valve housing of the shift plate. See Fig. 79
.
Torque Converter Lockup Clutch Regulating Valve, Task

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMI SSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:27 PMPage 139 © 2006 Mitchell Repair Information Company, LLC.

Hydraulic control of the torque converter lockup clutch and distribution of the lubricating oil.
Torque Converter Lockup Clutch Regulating Valve, Function

See TORQUE CONVERTER LOCKUP CLUTCH REGULATING VALVE, FUNCTION
.
Torque Converter Lockup Clutch Regulating Valve, Function
Fig. 80: Torque Converter Lockup Clutch Regulating Valve, Function
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Operation - The converter lockup clutch regulating valve (27) regulates the working pressure in the converter

2001 Mercedes-Benz ML320
1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662
me
Saturday, October 02, 2010 3:15:27 PMPage 140 © 2006 Mitchell Repair Information Company, LLC.