Cylinder Shutoff Valve, Location/Task/Design/Function

Cylinder Shutoff Valve, Position/Task/Design/Function

ENGINE 137.970




Y80/1 Cylinder shutoff valve for cylinders 7 - 9
Y81/1 Cylinder shutoff valve for cylinders 10 - 12
Pin 1 ME-SFI control module, cylinder shutoff on exhaust side
Pin 2 Terminal 87
Pin 3 ME-SFI control module, cylinder shutoff on inlet side
a Pressure oil supply
b Hydraulic circuit for cylinder shutoff on inlet side
c Hydraulic circuit for cylinder shutoff on exhaust side

Cylinder shutoff valve, location
On the cylinder head of the left cylinder bank



Y80/1 Cylinder shutoff valve for cylinders 7 - 9
Y81/1 Cylinder shutoff valve for cylinders 10 - 12

Cylinder shutoff valve, task
When actuated, pressure oil for the 3 cylinders is released from the secondary oil pump to the valve lever shafts on the inlet and exhaust side.

Cylinder shutoff valve, function
The electromagnetic cylinder shutoff valves are supplied with voltage by terminal 87. The cylinder shutoff valve is actuated in cycles on the ground side by the ME-SFI control module.
In the short term a starting current up to 3.5 A is permissible (on/off ratio approx. 95%). The holding current is approx. 1 A.