Distributor

The first test I had to do was measure the resistance in the distributer I was given the specifications for this distributer:
     name                           specifications                    actual           
g pickup coil                   185-275                             241.5ohms
ne pickup coil                 370-550                             492.7ohms

The first one I tested was the speed sensor(g picup coil)

I got the pins for this plug to find out which of the pins goes to the speed sensor then I wired it up and checked the resistance across it and like shown on the multymeter I got a result of 241.5Ohm.The second one i tested was the position sensor.

I already had to get the pin out for the plug to do the speed sensor and it is the same distributor so used same information and wired it up for the position sensor and measured the resistance and got a result of 492.7ohm wich is a lot higer than the speed sensor reading.this distributor is reuseable because both the result was wel within manufacturers specifications.


The second test i did was adjusting reluctor air gap on magnetic distributor.I used a feeler gauge to measure the air gap between pick up coil projection and the reluctor tip

The picture above shows the test being carried out.Thespcifications was given to me.

specifications                                                           actual                                     serviceable
g pickup coil        0.2-0.4mm                                  0.305mm                                yes
ne pickup coil      0.2-o.4mm                                  0.305mm                                yes

This ditributer is reusebale because it meats the specifification that was given to me.In this test you can see i took the feeler gauge and put it between the pickup coil and the reluctor tip.The pickup coil is the black box loocking object on this side and the reluctor tip is the tip sticking out of the top.I aded more sleaves of the gauge untill i had a good fit check what it was and this is how i got my result.

The third test that had to be done was to hook up the distributor to an osiliscope and record the patern

This is the patern I got on the osciliscope.I wired up the distributor to an osiliscope then i turned the distributor by hand and this is the patern that i got.

The next test I did was with a hall efect distributor.I wired up a hall efect distributor with a 5v supply then turned it by hand 45degrees at a time to see what hapens with the voltage

degrees turned                               voltage
0                                                   1.08v
45                                                 4.5v
90                                                 1.08v
135                                               4.5v
180                                               1.08v

these result shows it only realy has two voltage output there for if you pick up the ditributor 0degrees can be anywhere then u turn it voltage goes up turn it again voltage drops.

This is the wavform I got with the hall effect sensor.
The third tistributor I tested was a optical distributor.The distributor has three wires red for 12v supply black for earth and blue for signal out I did the same test as with the hall effect and got results of

position(degrees)                  voltage
0                                          5v
30                                        4.5v
60                                        5v
40                                        4.5v
120                                      5v

The results are the same as with the hall effect but with a lower voltage drop.Every time when it has a voltage drop with both the hall effect and the optical distributer it is when the engine fire when this is put into actual play in an engine.