W203 since 2000 of release
Repair and car operation
+ Mercedes-Benz Cars of a class C (W-203)
+ Operation manual
+ Routine maintenance
+ cooling and heating Systems
+ Power supply system and release
+ engine Electric equipment
+ Manual transmission
- Automatic transmission
- 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
+ Onboard electric equipment
The automated box of gear shifting 716.6
Elements of hydraulic management of Sequentronic automated by a check pointHinged elements of "Sequentronic" automated by a check point
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)
The hydraulic pump of Sequentronic automated by a check point
Hydraulic actuator of coupling of Sequentronic
Functioning of a hydraulic actuator of coupling
Principle of functioning of the hydraulic control unit
Supply of oil to electromagnetic valvesOil (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).