MembersPage/SkassaSubaruNewtrigger (2010-05-25 08:08:03)

This page contains all test of the new Subaru Trigger code


What we have seen 2010-05-24

We have stable 160 rpm at cranking fuel pump off.

When we cranking the car it´s stable in beginning it fires up to 300-600 rpm then random fires and rpm is no longer stable.

Its like it runs only on two cylinders (firing correct) but then losing sync.

We see some correct firing´s but also ignition fires at different times than it should. Obviously there is noise in the signal, that must be filtered.

Question: Haw is this code tested and what signal is used?

We have big trouble scoping the output of LM1815 because of the short signal like 15 micro sec. It should be a bit higher (20-30 usec), but you can enlarge it very easily, see below.

I would suggests that we use the p259 led´s output. When the processor get signal from lm1815 Pre/sec trigger we set the output high for 0.5 sec. This will give us a chance to see and measure what goes in and out of lm1815.

Triggerlog also shows the time of the pulse (although currently for the primary trigger only).

Watching the input with analog scope is of primary importance. Even if the output is perfect, if the input is on the edge, it can break any time (eg. in cold).


Ideas - setting up more agressive filtering for this low toothcount


Subaru_1.jpg

New Vems pcb installed

Subaru_2.jpg

Our technical engineer trying to hunt down the errors

Subaru_3.jpg

Test car 600 Hp HKS Subaru