Mercedes-Benz G-class (W463) since 1999 of release
1. Introduction
2. Governing bodies and operation receptions
3. Current leaving and service
4. Engine
5. Systems of cooling, heating, ventilation and air conditioning
6. A power supply system and production of the fulfilled gases
7. Systems of electric equipment of the engine
8. Automatic transmission
9. Transmission line
9.1. A full drive - the general information
9.1.1. Basic principles of the organization of a constant full drive
9.1.2. Greasing of sharnirny knots and sliding joints of driveshafts
9.1.3. Air removal from a hydraulic path of a drive of blocking of differentials
9.2. Transfer case
9.3. Bridges
10. Brake and auxiliary systems
11. Suspension bracket and steering
12. Body
13. Onboard electric equipment
14. Schemes of electric connections


 







9-1-polnyjj-privod-obshhaya-informaciya.html

9.1. A full drive - the general information

Basic principles of the organization of a constant full drive

General information

The torque developed by the engine is transferred through AT to the transfer case equipped with interaxal differential and from there, by means of driveshafts, to differentials of assemblies of forward and back bridges.

On all models considered in the real Management the full drive is executed by not disconnected. In a design of a two-level transfer case the mechanism of blocking of interaxal differential is provided. The reducer of a transfer case is completely synchronized, thanks to what switching of steps can is made during movement. Mechanisms of compulsory blocking of both interwheel differentials are provided also.

Order of blocking of differentials

Management of blocking of differentials is made by means of built in in the central part of the dashboard of the car of switches (see. Section Governing bodies and salon equipment). Blocking should be made strictly in a certain sequence: INTERAXAL DIFFERENTIAL —› ZADNY Bridge —› PEREDNY Bridge. Blocking of differentials should be included only in difficult terrains, at drives through water or on the roads covered with snow, ice or dirt.

In difference from cars with a connected full drive here the torque is transferred on both axes constantly. Capacity redistribution between axes provides interaxal differential. The mode of rigid communication between the axes, necessary for achievement of the maximum traction effort, is provided with blocking of this differential.

To advantages of a constant full drive stability of characteristics of controllability of the car, possibility of use of the bottom number of a transfer case treat without blocking, and consequently, on any roads without restriction on coupling. Besides such car always is in a condition of «the increased combat readiness». Compulsory blocking of differentials can be used, as an additional tool of increase of passableness in case of problems on off road terrain. It should be noted that the maximum draft at bad coupling with soil can be received only by means of compulsory blocking as any automatic equipment assumes pro-slipping of wheels (if pro-slippings are not present, blocking does not work), by all means bringing to losses of traction effort

The constant full drive and shortcomings is not deprived. After all such car should turn all driveshafts and semi-axes. As a result on asphalt its transmission it is also noisy, as well as a connected full drive with the switched-on wheel couplings, and also provides an "all-wheel drive" increase to fuel consumption.

Nevertheless the constant full drive provides nevertheless more positive moments, than negative, especially for the real SUVs.

Elements of management of blocking of differentials

and — the Tank
with — Pressure head blocks of switching of blocking of interwheel differentials of assemblies of forward and back bridges

d — Executive cylinders of switching of blocking of interwheel differentials of assemblies of forward and back bridges

Function chart of a hydraulic actuator of blocking of differentials

1 — the Tank
2 — Pressure head blocks of switching of blocking of interwheel differentials of assemblies of forward and back bridges
3 — Executive cylinders of switching of blocking of interwheel differentials of forward (VA) and back (HA) of bridges

4 — the Arch of the right wheel
and — the Contour of supply of hydraulic liquid
b — Working contours of executive cylinders

Design of the hydropneumatic pressure head block

1 — air Access
2 — To the tank of hydraulic liquid

3 — To the executive cylinder of the mechanism of management of blocking
4 — the Soaking-up union (depression)

Scheme of an arrangement of mechanical components of management of blocking of interwheel differentials

and — Sapun of ventilation of a case of the bridge

b — the Switching finger

Scheme of an arrangement of mechanical components of management of blocking of interaxal differential

1 — a switching Fork
2 — the Executive cylinder

3 — the Operating switch (S76/2)

Scheme of an arrangement of pneumatic components of management of blocking of differentials

M14/1 — the Auxiliary vacuum pump (petrol models)
67 — the Vacuum pump (diesel models)
and — the Vacuum receiver (0.4 l)

b — Pressure head blocks of switching of blocking of interwheel differentials of assemblies of forward and back bridges

Function chart of a pneumodrive of blocking of differentials on DIESEL models (blocking of interaxal differential and interwheel differential of the back bridge are included

and — the Element is activated
b — Pressure of switching
with — Pressure of giving
d — Hydraulic pressure
1 — the Transfer case (interaxal differential)
2 — the Electromagnetic valve (Y68) of switching of blocking of interaxal differential
3 — the Replaceable filter of the electromagnetic valve
4 — To the vacuum pump
5 — the Control valve
6 — the Electromagnetic valve (Y68/1) of switching of blocking of interwheel differential of the back bridge
7 — the Electromagnetic valve (Y68/2) of switching of blocking of interwheel differential of the forward bridge
8 — the Vacuum receiver of brake system in a cross-section beam of a frame: 4.4 l (auxiliary vacuum receiver: 1.8 l)

9 — To the servo-driver of the vacuum amplifier of brakes
10 — the Vacuum receiver of blocking of differential (0.4 l)
11 — the Pressure head block of switching of blocking of interwheel differential of the forward bridge
12 — the Union of a hydraulic path of management of blocking of interaxal differential of the forward bridge
13 — To the tank of hydraulic liquid
14 — the Union of a hydraulic path of management of blocking of interaxal differential of the back bridge
15 — the Pressure head block of switching of blocking of interwheel differential of the back bridge
16 — the Arch of the right wheel

Function chart of a pneumodrive of blocking of differentials on PETROL models (blocking of interaxal differential and interwheel differential of the back bridge are included

and — the Element is activated
b — Pressure of switching
with — Pressure of giving
d — Hydraulic pressure
1 — the Transfer case (interaxal differential)
2 — the Electromagnetic valve (Y68) of switching of blocking of interaxal differential
3 — the Replaceable filter of the electromagnetic valve
4 — To the inlet pipeline
5 — the Control valve
6 — the Electromagnetic valve (Y68/1) of switching of blocking of interwheel differential of the back bridge
7 — the Electromagnetic valve (Y68/2) of switching of blocking of interwheel differential of the forward bridge
8 — the Vacuum receiver of brake system in a cross-section beam of a frame: 4.4 l (auxiliary vacuum receiver: 1.8 l)

9 — To the servo-driver of the vacuum amplifier of brakes
10 — the Vacuum receiver of blocking of differential (0.4 l)
11 — the Pressure head block of switching of blocking of interwheel differential of the forward bridge
12 — the Union of a hydraulic path of management of blocking of interaxal differential of the forward bridge
13 — To the tank of hydraulic liquid
14 — — the Union of a hydraulic path of management of blocking of interaxal differential of the back bridge
15 — the Pressure head block of switching of blocking of interwheel differential of the back bridge
16 — the Arch of the right wheel
17 — the Auxiliary electric vacuum pump (M14/1)

Scheme of an arrangement of electric components of management of blocking of differentials (1 of 2)

1 — the Switch of blocking of interaxal differential
1.1 — Control lamp of inclusion blocking (yellow)
1.2 — Control lamp of functioning blocking (red)
2 — the Switch of blocking of interwheel differential of the back bridge
2.1 — Control lamp of inclusion blocking (yellow)
2.2 — Control lamp of functioning blocking (red)
3 — the Switch of blocking of interwheel differential of the forward bridge
3.1 — Control lamp of inclusion blocking (yellow)

3.2 — Control lamp of functioning blocking (red)
N30/2 — the Module of management of blocking of differentials
S76/2 — the Operating sensor switch of blocking of interaxal differential
S76/3 — the Operating sensor switch of blocking of interwheel differential of the back bridge
S76/4 — the Operating sensor switch of blocking of interwheel differential of the forward bridge

Scheme of an arrangement of electric components of management of blocking of differentials (2 of 2)

3the Relay (К36) of activation of the auxiliary electric vacuum pump (M14/1) on petrol models
29, 30Safety locks
K1/1 = K1/2 (diesel models)
K1/2Protection against electric overloads (petrol models)
Y68 — the Electromagnetic valve of switching of blocking of interaxal differential

Y68/1 — the Electromagnetic valve of switching of blocking of interwheel differential of the back bridge
Y68/2 — the Electromagnetic valve of switching of blocking of interwheel differential of the forward bridge

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9.1.1. Basic principles of the organization of a constant full drive