Re: Downshift Tuning
Posted: Sat Jun 27, 2015 6:35 am
Lance,
The issue concerning the downshift appears to be fixed so thanks for that. I now have another question as I need help figuring out why mshift appears to not be shifting at the correct speed according to my shift table. In my log you can see at -
@ 676.009, 31.5 avload (mshift), 99.1 km/hr (mshift) speed, 94.6 km/hr GPS speed the current gear is 3rd when according to shift table 1 it should be 4th.
then @ 694.720 , 27.2 avload (mshift), 107.2 km/hr (mshift) speed, 102.2 km/hr GPS speed mshift changes to 4th gear when it should have already been in 4th gear.
then @ 708.353, 25.3 avload (mshift), 104.6 km/hr (mshift) speed, 100.7 km/hr GPS speed mshift changes back to 3rd when it should stay in 4th according to the shift table 1.
The GPS speed I use is obtained from the QSTARZ BT-Q818XT 10Hz which is the unit recommended by efianalytics for use with tunerstudio and megasquirt. I used the GPS to check that the speed I was seeing from mshift was correct, while there is about a 5 km/hr difference compared to mshift speed I don't believe that this is the problem as the speed bins for 4th in table 1 are much lower at the avload shown in the log.
The SI Lengths are "activated" in can settings and the speed bins for table 1 show km/hr. My shift hysteresis speed 3.1 km/hr and shift hysteresis time 1.5 sec should have already been met, so I don't know why this is. Any ideas on what is going on?
Also do I need to start this in another thread?
Thanks
The issue concerning the downshift appears to be fixed so thanks for that. I now have another question as I need help figuring out why mshift appears to not be shifting at the correct speed according to my shift table. In my log you can see at -
@ 676.009, 31.5 avload (mshift), 99.1 km/hr (mshift) speed, 94.6 km/hr GPS speed the current gear is 3rd when according to shift table 1 it should be 4th.
then @ 694.720 , 27.2 avload (mshift), 107.2 km/hr (mshift) speed, 102.2 km/hr GPS speed mshift changes to 4th gear when it should have already been in 4th gear.
then @ 708.353, 25.3 avload (mshift), 104.6 km/hr (mshift) speed, 100.7 km/hr GPS speed mshift changes back to 3rd when it should stay in 4th according to the shift table 1.
The GPS speed I use is obtained from the QSTARZ BT-Q818XT 10Hz which is the unit recommended by efianalytics for use with tunerstudio and megasquirt. I used the GPS to check that the speed I was seeing from mshift was correct, while there is about a 5 km/hr difference compared to mshift speed I don't believe that this is the problem as the speed bins for 4th in table 1 are much lower at the avload shown in the log.
The SI Lengths are "activated" in can settings and the speed bins for table 1 show km/hr. My shift hysteresis speed 3.1 km/hr and shift hysteresis time 1.5 sec should have already been met, so I don't know why this is. Any ideas on what is going on?
Also do I need to start this in another thread?
Thanks