KMS MD35 - Page 16

KMS MD35 manual
Version 4.16 16
In the KMS software the degrees must be ascending. Set the degrees in the software and connect
the right coil signal to each cylinder. You can find an example of the determination of odd-firing
degrees on the following page.
Example:
6 cylinder 90 degree 4-stroke V-engine with firing order 1-4-3-6-2-5 and reference point on cylinder
1. Bank 1 is cylinder 1, 2, 3. Bank 2 cylinder 4, 5, 6.
When the 6 cylinders are evenly devided over 2 rotations (720 degrees) you get 120 degrees
between the cylinders.
Cyl. 1
Cyl. 4
Cyl. 3
Cyl. 6
Cyl. 2
Cyl. 5
0
120
120
120
120
120
0
120
240
360
480
600
There are only 3 crankpins. Each crankpin connects 2 connecting rods. With the 90 degree V-shape
lay-out and only 3 crankpins, the cylinders aren‟t evenly devided. With cylinder 1 at 0 degree the
next cylinder is 4 not at 120 degrees but on 90 degrees (same crankpin but on other bank). The
following cylinder after cylinder 4 is cylinder 3. Cylinder 3 is at 240 degrees (difference cylinder 3
to 4 is 240 – 90 = 150 degrees). Cylinder 6 is on the same crankpin so only 90 degrees devided from
cylinder 3 what gives 240 + 90 = 330 degrees. Cylinder 2 is at 480 degrees (difference cylinder 2 to 6
is 480 – 330 = 150 degrees). Cylinder 5 is again on the same crankpin and 90 degrees further which
gives 480 + 90 = 570 degrees.
Cyl. 1
Cyl. 4
Cyl. 3
Cyl. 6
Cyl. 2
Cyl. 5
0
90
150
90
150
90
0
90
240
330
480
570
In the software you can fill in a maximum of 360 degrees after TDC cylinder1. So this would mean
that cylinder 2 and 5 can‟t be set up. Every value above 360 you need to subtract 360 degrees.
Which result for cylinder 2 in 480 – 360 = 120 degrees and cylinder 5 in 570 – 360 = 210 degrees
Cyl. 1
Cyl. 4
Cyl. 3
Cyl. 6
Cyl. 2
Cyl. 5
0
90
240
330
480
570
0
90
240
330
120
210
In the KMS software the degrees must be ascending. This would result in:
Coil 1
Coil 2
Coil 3
Coil 4
Coil 5
Coil 6
Cyl. 1
Cyl. 4
Cyl. 2
Cyl. 5
Cyl. 3
Cyl. 6
0
90
120
210
240
330
Tacho output:
The tachometer output normally sends out an output signal adapted to the engine's no. of cylinders.
In case you want to use the tachometer of another engine type, you can adjust the tachometer
output correspondingly.
No. of cyl.:
Select the amount of cylinders of the vehicle. You can choose between 4, 5, 6, 8 and 10 cylinders.
For a 1, 2 choose 4 cylinders. For a 3 cylinder choose 6 cylinder. For equal firing V12 engine choose
6cylinder and set odd firing to 0-60-120-180-240-300 degree
Warning:
For adaption to a 6 cylinder with direct fire or a 12 cylinder configuration,
ensure that the "No. of cylinders" has been specified correctly before
connecting the coils. If the coils are connected with the numbers of
cylinders incorrectly set, the coil via output 6 will be seriously damaged.