Mercedes C-Class

W203 since 2000 of release

Repair and car operation

Mercedes-Benz
+ Mercedes-Benz Cars of a class C (W-203)
+ Operation manual
+ Routine maintenance
+ Engine
+ cooling and heating Systems
+ Power supply system and release
+ engine Electric equipment
+ Manual transmission
- Automatic transmission
   Specifications
   - The automated box of gear shifting 716.6
      Elements of hydraulic management of Sequentronic automated by a check point
      Elements of electronic control and signals of the control unit of Sequentronic automated by a check point
   + Automatic transmission 722.6
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment

The automated box of gear shifting 716.6

Elements of hydraulic management of Sequentronic automated by a check point

Hinged elements of "Sequentronic" automated by a check point


1 — a ventilation Cover 2 — the ventilation Valve 3 — the Accumulator 4 — the Lever of switching off of coupling 5 — the Sealing cap 6 — the Forward case of a check point 7 — the Switch of recognition of transfers	8 — the Sensor of number of turns 9 — the Holder of the sensor of recognition of transfers 10 — Carter of a check point 11 — the Pump 12 — the Tank 13 — the Hydraulic block

Elements of a hydraulic actuator of management of coupling and switching of "Sequentronic" automated by a check point

The hydraulic control unit automated by a check point (Sequentronic)


2 — Klapannaya assembly 2а — the Socket of the pressure head line 2b — the Socket of the returnable line 2с — the Oil filter 2d — the Socket of the pressure head line of switching off of coupling 3 — the Executive cylinder	Y90 — the Electromagnetic valve of coupling of system of automatic gear shifting Y91 — the Electromagnetic valve of braking automated by a check point with the built-in reduktsionny valve Y92/1 — the Electromagnetic valve of switchings 1, 3, 5 Y92/2 — the Electromagnetic valve of switchings of R, 2, 4, 6

The hydraulic pump of Sequentronic automated by a check point


4 — Elektromotor 4а — Shesteryonchaty the pump 4b — Maslozaborny the socket	4с — the Socket of the pressure head line М46 — the Hydraulic pump Sequentronic [ASG]

Hydraulic actuator of coupling of Sequentronic


13а — the Casing 13b — the Persistent ring 13с — Balls 13d — the Protective cover 13е — the Spring of preliminary loading 13f — the Sealant	13g — the Working piston 13h — the Coupling And — the Provision of the switched-off coupling In — Base situation. Coupling is included В53 — the Sensor of a course of coupling

Functioning of a hydraulic actuator of coupling


0 — the Channel of return of liquid A — the Central hydraulic vyzhimny device of coupling A1 — the Spring A2 — the Working piston	B — Klapannaya assembly I\Pressure head chamber I p — Hydraulic pressure Y90 — the Electromagnetic valve of coupling

Principle of functioning of the hydraulic control unit

Supply of oil to electromagnetic valves

Oil (Pentosin) forced by the hydraulic pump on the steel line moves in klapanny assembly (2), is pumped over via the oil filter (2с) and via the control valve arrives to electromagnetic valves of coupling (Y90), switchings (Y92/1 and Y92/2) and braking (Y91)

Management of coupling

Activation of the electromagnetic valve of coupling (Y90) is carried out on command from the control unit of transmission (N15/6) and provides supply of oil on the pressure head line connected to the socket (2d) in executive knot of a drive of coupling.

Management of gear shifting

Depending on the current traffic conditions the control unit (N15/6) makes activation of the corresponding electromagnetic valve of switching (Y92/1 or Y92/2) klapanny assembly. The activated valve provides giving of hydraulic pressure in the cylinder of switching influencing the central rod of switching and providing a choice of demanded transfer by means of the corresponding connecting elements in transmission.

Principle of functioning of the hydraulic pump

The electromotor (4) is activated at the command of the control unit (N15/6) and provides a drive of the shesteryonchaty pump connected to the coupling (4а).

Rotation of gear wheels provides absorption of working liquid (oil) via the inlet socket (4b), its compression and giving under pressure via the socket (4с).

The pump also provides oil pumping in a receiver of system pressure.

Principle of functioning of a hydraulic actuator of coupling

The working piston (13g) under the pressure of hydraulic pressure is displaced forward in the coupling (13h). The persistent ring (13b) wrings out a disk spring and activates coupling.

Internal sealing is provided at the expense of a sealant (13f).

The protective cover (13d) provides protection of a moving surface of the vyzhimny device of coupling against dirt hit. The preloading spring (13е) provides minimization of initial loading of a drive of the vyzhimny bearing for the purpose of decrease in level of a noise background.

At the switched-off coupling

The control unit (N15/6) activates the electromagnetic valve (Y90) in klapanny assembly (In) which provides giving of hydraulic pressure (R) in the vyzhimny device (And). The working piston (А2) is displaced forward, in the direction to a disk spring. The persistent ring nestles on a disk spring, providing its raskryvaniye.

At the included coupling

The valve (Y90) in klapanny assembly (In) is not activated and the returnable spring holds him in base situation. As a result the pressure head chamber I in the hydraulic vyzhimny device (And) appears unloaded that guarantees existence of communication with final port of the oil tank (0).