Lombardini LDW 422 SERIES, Руководство по ремонту

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9 8
18-10-2004
18-10-2004
00
REG. CODE
1-5302-662
MODEL N°
51092
DATE OF ISSUE
REVISION
DATE ENDORSED
COMPILER TECO/ATI
320
XI
321
322
DISASSEMBLY/REASSEMBLY
Injection advance variator
Caption:
1- Injection advance variator fastening screw
2- Washer
3- Calibrated spring cases
4- Lock rings
5- Centrifugal weights
6- Lock rings
7- Lock rings
8- Counterflange
9- Snap ring for shafts
10- Washer
11- Cam for injection pump with P.I.
Description of the injection advance regulator
When starting, and at a low idling speed the correct value of injection
advance is 11° before P.M.S..
This value increases in accordance with the engine RPM, attains 24° at
3500 R.P.M., then renains constant.
The advance variation is obtained through the injection advance regulator,
see fig. 321.
It consists of the flange A (fig. 321) splined to the camshaft and the carrier,
both with the fulcrum on two pins, of the centrifugal weights C (fig. 322);
of a counterflange F (fig. 321), integral with the injection cam and free to
rotate on the camshaft, on which two slots are made where the pins D (fig.
323) connected to the centrifugal weights slide.
Appropriate springs B (fig. 322) are applied between the centrifugal
weights C (fig. 322) and the flange A (fig. 321).
With the engine stopped and at low idling speed the spring load is higher
than the weights centrifugal force, therefore they remain closed, see fig.
322.