What is IVO lubrication???

IVO lubrication system is used in sulzer engines for cyclinder lubrication. In this system oil goes directly from pump to quills. Now in  new sulzer engine pulse type lubrication is used. To understand the ivo system it is very important to focus on the diagram its little complex but not difficult. There are 8 quills on the liner

IVO LUBRICATOR
 following are the parts of the ivo lubricator:
1. Pump shaft.
2. Gear shaft.
3. Upper and lower outlet pipe.


4. Control plunger.                                              5. Main plunger.                                                   6. Pump element.                                                 7. Twisted disc for control plunger .               8. Twisted  disc for main plunger.                 
9. Set screw for adjustment.                           
10. Inlet pipe to pump .                                    

WORKING OF LUBRICATOR IS AS:

The gear shaft is rotated by the pump shaft by the gears (worm and pinion) attached to it. On gear  shaft two twisted disc are.           mounted , twisted disc for control.                 plunger(7)is the lower one and  twisted disc for main plunger (8)is top one.  The disc are so desiged when gear shaft rotates it makes both plungers to move in too and fro.             motion and disc design is also such for.          every to and fro motion of control plunger , the main plunger does this motion (to and   fro) twice.                                                             The set screw (9)  is given  to control the delivery amount of lubricating to quills.       fitted on liner.  The suction pipe (10) draws  lubricating oil from the reservior which is.    taken up into the pump chber when control plunger connects the same to inlet pipe .     

WORKING:
Lets explain the working of plungers , the gear shaft moves the discs also rotates.      which result in to and fro motion of plunger.                                

Let us name the groves as :         
A- outlet pasaage to quills.        
B- outlet passage to quills.         
C- lower grove from pump casing
D-upper grove from pump casing
(these both groves connects the control plunger inlet grove (F) to main plunger pumping area through the side grove on  control plunger(E).
As the discs starts rotating , the control plunger moves down that connects the F to inlet pipe as plunger is at lower position that connects D to the main plunger and through E it connect to A. As the disc for main plunger rotates ,  main plunger starts moving up means it sucks oil form inlet pipe through F and E and then on further roation the control plunger is at same position the main plunger moving down so oil goes to A through E. 
Now main plunger again moves up sucks oil and further rotation of discs the control plunger moves up now connects the grove D to B and disc moves results in down movement of main plunger delivers the oil to grove B through E , thus giving oil to quills and for every on to and fro movement of Control plunger main plunger moves to and fro twice.
The oil from the lubricating pump to quills
gets discharged twice inside the liner during  each revolution of main engine crankshaft- once during the begining of expansion stroke as the piston is moving downward and secondly during the end of the compression stroke.
                                                                                    

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