JO and Til, thats the thing. I never experianced this before! Allso what l noticed yesterday is if l use the hybrid mode a lot like driving uphill, the simptomes disapear. Its the worst when l drive for a few km on 100% char then try to hybrid. Lambda goes from 700mv (slightly rich chargas) to 0mv, power down, then slowly both power and voltage rise back to 300-700mv (stech).
Well in theory pressing on the petrol tb makes the same effect on the charges system as leting go the chargas throtle so it shuldnt effect a/f ratio?
I dubt dust can get in there… runing 100% char the petrol tb is sealed shut. In case of hybriding the chargas system is under more vacuum so when the petrol tb is open, the air will rather move down thain gas going back up.
Unfortunsly looking in there is about 3 hours of work, you need to get every pipe and fulel line dissconnected
Rindert, ha, my problem is actualy reversed. I run great on chargas but have problems with petrol JOs words come to mind, woodgas being so much simpler thain petrol
Thirry and Bob, l just cant get this. In theory Hydrogen shuld be more resistant to autoignition thain most other gases??? Thus woodgas can be run in diesel engines with not too much compression just fine??
Here is what l think is happening. We have a engine ignition set for a mix of CO and H2, aka woodgas. Its a slow burning gas so we advance the timing. But if we increase hydrogen content we increase flame speed drasticaly becouse hydrogen has such a fast flame speed, even higher thain petrol. At this point the ignition shuld be retarded, if not, engine knock occurs. I think the timing is the problem mot the compression ignition of hydrogen.
Ok, some update. Pushing the limits Cleaned the filter and ashpit yesterday, topped the hopper this time with a mix of dry eggsize wood chunks and char, 50/50 this time, and went for a drive. Power good, idle good, and this morning not a trace of stickyness on the throtle was detected! This was a mixed drive, some open road some town trafic drive, with 2 30min stops.