Mercedes-Benz ML320. Service manual - part 185

 

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Mercedes-Benz ML320. Service manual - part 185

 

 

Fig. 118: Power Flow In 1st Gear, Function 
Courtesy of MERCEDES-BENZ OF NORTH AMERICA. 

Principal of power transmission in 1st gear 

The torque coming from the torque converter is increased and transmitted to the output shaft (5) via the input 
shaft (1), involving all three planetary gear sets. See Fig. 118

The following are not engaged:  

Front Multi-Disc Clutch (K1)  

 

2001 Mercedes-Benz ML320 

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

  

me 

 

Center Multi-Disc Clutch (K2)  

Center Multi-Disc Brake (B3)  

Front Planetary Gear Set  

The input shaft (1) drives the internal gear (V4). In drive mode the sun gear (V1) is supported via the locked 
freewheel F1 and in overrun mode via the engaged front multi-disc brake (B1) in the housing (B1). The 
planetary gears (V2) roll over the fixed sun gear (V1) and provide an increase in torque between the internal 
gear (V4) and the planet carrier (V3). The planet carrier (V3) moves at reduced speed in the direction of engine 
rotation. 

Rear Planetary Gear Set  

The internal gear (H4) turns at a reduced speed because of its mechanical connection to the front planet carrier 
(H3). The sun gear (H1) is supported via the engaged rear multi-disc brake (B2) and in drive mode via the 
locked freewheel (F2), in overrun mode via the engaged rear multi-disc clutch (K3) in the housing. The planet 
gears (H2) roll over the fixed sun gear (H1) and provide an increase in torque between the internal gear (H4) 
and the planet carrier (H3). The planet carrier (H3) moves at a reduced speed in the direction of engine rotation. 

Center Planetary Gear Set  

The ring gear (M4) is driven at the same speed as the rear planet carrier (H3) as a result of a mechanical 
connection. The sun gear (M1) is supported in the housing via the rear multi-disc brake (B2) (M1). The planet 
gears (M2) roll over the fixed sun gear (M1) and provide an increase in torque between the internal gear (M4) 
and the planet carrier (M3). The output shaft (5) connected to the planet carrier (M3) turns at a reduced speed in 
the running direction of the engine. 

Torque Converter, Location/Task/Design/Function 
 
See TORQUE CONVERTER, LOCATION/TASK/DESIGN/FUNCTION

Planetary Gear Set, Location/Task/Design/Function 
 
See PLANETARY GEAR SET, LOCATION/TASK/DESIGN/FUNCTION

Multiple-Disc Brake, Location/Task/Design/Function 
 
See MULTIPLE-DISC BRAKE, LOCATION/TASK/DESIGN/FUNCTION

Multi-Plate Clutch, Location/Task/Design/Function 
 
See MULTI-PLATE CLUTCH, LOCATION/TASK/DESIGN/FUNCTION

Location/Task/Design/Function Of Freewheel 
 
See LOCATION/TASK/DESIGN/FUNCTION OF FREEWHEEL

 

2001 Mercedes-Benz ML320 

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

  

me 

 

PLANETARY GEAR SET, LOCATION/TASK/DESIGN/FUNCTION

Fig. 119: Planetary Gear Set, Location/Task/Design/Function 
Courtesy of MERCEDES-BENZ OF NORTH AMERICA. 

Planetary Gear Set, Location 

 

2001 Mercedes-Benz ML320 

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

  

me 

 

 
Three planetary gear sets are used to produce the different gear ratios. These are located in the mechanical 
part of the transmission as the front, center and rear planetary gear set (V, M, H). 

Planetary Gear Set, Task 
 
Power transmission and production of different gear ratios. 

Planetary Gear Set, Design 
 
A planetary gear set consists of the ring gear (1), the planet gears (2) carried in the planet carrier (4) and 
the sun gear (3). 

Planetary Gear Set, Function 
 
See PLANETARY GEAR SET, FUNCTION.  

Planetary Gear Set, Function 

 

2001 Mercedes-Benz ML320 

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

  

me 

 

 

 

 

 

 

 

 

Content   ..  183  184  185  186   ..