Low RPM, low/high TP area concerns
Posted: Fri Apr 08, 2022 12:12 am
I have philosophical concerns about the following areas: 1, 2, 3, 4 ,5
1) When are they solicited (which driving conditions) ?
2) What are the target AFR for each area ? Is an area supposed to be leaner than other ?
a) I reach area 1 when gently exercising throttle to start from a full stop
b) I reach area 2 when exercising throttle stronger to start from a full stop, trying to escape faster from the stop
c) Area 3 is probably used when Alpha/N increase is invoked
d) What is area 4 for ?
e) I reach area 5 in at a least 2 conditions: cranking up phase (when switching to the fuel map or when exercising the starter for a longer time than usually required) or when driving back, i.e. exercising more the clutch pedal than the throttle, hesitating, so RPM drop
For a) and b), I usually see some AFRs in the 12-13 range, or sometimes lower, quite rich, but I also have sometimes a drawback: engine is hesitating and RPM drops a bit.
I want to improve b) without this side-effect of back and forth.
1) When are they solicited (which driving conditions) ?
2) What are the target AFR for each area ? Is an area supposed to be leaner than other ?
a) I reach area 1 when gently exercising throttle to start from a full stop
b) I reach area 2 when exercising throttle stronger to start from a full stop, trying to escape faster from the stop
c) Area 3 is probably used when Alpha/N increase is invoked
d) What is area 4 for ?
e) I reach area 5 in at a least 2 conditions: cranking up phase (when switching to the fuel map or when exercising the starter for a longer time than usually required) or when driving back, i.e. exercising more the clutch pedal than the throttle, hesitating, so RPM drop
For a) and b), I usually see some AFRs in the 12-13 range, or sometimes lower, quite rich, but I also have sometimes a drawback: engine is hesitating and RPM drops a bit.
I want to improve b) without this side-effect of back and forth.