powerboy Posted March 5, 2017 Report Share Posted March 5, 2017 Any body help me to solve my problem.My engine is one cylinder with 24 (reluctor) and 1 (hall) teeth on crank and cam.The crank sensor signal very clear on oscilloscope.The crank arming threshold is0 1000 2000 3000 4000 5000 6000 70000.2 0.4 0.7 0.9 1.1 1.3 1.6 1.8But sometime, while cranking, the engine rpm rise over 2000 RPM immediately (last 20 second in log file) and engine knock sound very loud and engine suddenly brake. How can i check my Link ecu crank cam input brake or not good condition working?In the log file on the time -2.06 to -1.54, i try to rev engine to highest rpm and check the crank and cam on oscilloscope.The signals looking good no any noise but in logger show the engine rev over 12000 rpm at time -2.00. Mar_05Log.llg Quote Link to comment Share on other sites More sharing options...
krohelm Posted March 5, 2017 Report Share Posted March 5, 2017 Can you log more stuff on PC, like runtime values for trigger1/2 errors etc? It's really looking like you've got a trigger signal quality problem; maybe your arming voltages are too low, resulting in extra triggers. File time 6:01.243 engine speed is 37,350rpm - not a very plausible figure. If you have an oscilloscope, you should shoot for arming threshold around 1/2 the peak trigger voltage at each rpm range as a starting point. Lower voltage threshold is more susceptible to noise (e.g., ignition component emi), but higher voltage can cause skipped trigger signals. Maybe also double check your cam sensor to make sure it's clean, not sending extra cam pulses accidentally. Quote Link to comment Share on other sites More sharing options...
Adamw Posted March 5, 2017 Report Share Posted March 5, 2017 Can you post an image from your oscilloscope capture for us to take a look. Quote Link to comment Share on other sites More sharing options...
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