Mercedes-Benz ML320. Service manual - part 186

 

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Mercedes-Benz ML320. Service manual - part 186

 

 

 

2001 Mercedes-Benz ML320 

1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662

  

me 

 

Fig. 120: 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. 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  

1.

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 

 

Fig. 121: Planetary Gear Set, Function (2 Of 5) 
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

 

2001 Mercedes-Benz ML320 

1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662

  

me 

 

2.

Hollow gear locked.  

Sun gear driving.  

Planet gears driven.  

Relatively high step-down ratio. 

 

2001 Mercedes-Benz ML320 

1998-03 AUTOMATIC TRANSMISSIONS Complete Transmissions - ML 320 - 722.662

  

me 

 

 

 

 

 

 

 

 

Content   ..  184  185  186  187   ..