GF07.16-P-3012IB | CDI high pressure circuit function | 10.9.99 |
ENGINE 628.960 in MODEL 220.028 /128
ENGINE 628.963 in MODEL 163.128
ENGINE 628.961 in MODEL 211.028
P07.16-2214-76
19 High-pressure pump
21 Rail
21/7 Valve block
F Fuel high pressure
B4/6 Rail pressure sensor
Y74 Pressure regulator valve
Y76y1 Fuel injector cylinder 1
Y76y2 Fuel injector cylinder 2
Y76y3 Fuel injector cylinder 3
Y76y4 Fuel injector cylinder 4
Y76y5 Fuel injector cylinder 5
Y76y6 Fuel injector cylinder 6
Y76y7 Fuel injector cylinder 7
Y76y8 Fuel injector cylinder 8
Y94 Volume control valve
Task
Controlling and storing the fuel pressure required for injection.
Function
The high pressure pump (19) pumps the fuel into the valve block (21/7) in line with the engine speed. The fuel flows from the valve block into one rail (21) each and from there along the high-ressure lines to the individual fuel injectors (Y76).
The valve block (21/7) and the respective rail (21) act as a high pressure reservoir.
The size of the cross-section in the pressure regulator valve (Y74) and quantity control valve (Y94) is altered in order to control the rail pressure.
The rail pressure sensor (B4/6) measures the current rail pressure and sends an appropriate voltage signal to the CDI control unit
(N3/9). The pressure control valve (Y74) or the quantity control valve (Y94) is then actuated through the CDI control unit (N3/9) in accordance with the specified pressure.
CDI quantity control valve, location/task/function | |||
High pressure pump, location/task/function | |||
Rail pressure sensor, location/task/design/function | |||
Pressure control valve, location/task/design/function | |||
Rail, location/task/design/function | |||
High pressure lines, location/task/design | |||
Injector location/Function/Design/Operation | |||
CDI high pressure control loop function | |||
CDI control unit, location/task |