CZ and Cruize control
#1
CZ and Cruize control
I found out something interesting today on my highway drive to Pullalup.
When you are in cruise control....the E-manage reads a throttle position of zero the way the CZ is set up.
This causes the car to run in a static position on the map. At 75MPH its at 0TP and 3900ish box in 6th gear. This isn't a problem at this point per say....as it is in closed loop. The problem is when you are going 77+mph....depending on the load....it will switch into open loop mode, and run rich (about 14.0ish). What I did was put a -4 value in the box ( not used for much else, as 0TP and >idle is off load anyway) so that it will run stoich.
I talked to Dan Harrison, and am trying to get him to add the open/closed loop indicator to the loggable values. Will make it easier to figure out when this thing wants to run in open loop.
I've altered a lot more of my parial throttle values on the A/F map, as it goes into open loop a lot more than not over 5K RPM and over 20%throttle
I have a few spots that it is still adjusting closed loop a bit, because it alters my fuel trims a bit driving around town....doesn't seem to be a problem though.
When you are in cruise control....the E-manage reads a throttle position of zero the way the CZ is set up.
This causes the car to run in a static position on the map. At 75MPH its at 0TP and 3900ish box in 6th gear. This isn't a problem at this point per say....as it is in closed loop. The problem is when you are going 77+mph....depending on the load....it will switch into open loop mode, and run rich (about 14.0ish). What I did was put a -4 value in the box ( not used for much else, as 0TP and >idle is off load anyway) so that it will run stoich.
I talked to Dan Harrison, and am trying to get him to add the open/closed loop indicator to the loggable values. Will make it easier to figure out when this thing wants to run in open loop.
I've altered a lot more of my parial throttle values on the A/F map, as it goes into open loop a lot more than not over 5K RPM and over 20%throttle
I have a few spots that it is still adjusting closed loop a bit, because it alters my fuel trims a bit driving around town....doesn't seem to be a problem though.
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