Feature suggestion for MShift
Posted: Wed Jul 01, 2015 10:48 pm
Just a suggestion:
I live in an area with many "traffic calming speed bumps". This requires frequent reduction in speed after obtaining Vmax from the previous speed bump. My daughter's S40 Volvo is most frustrating in this area as it only initiates a shift to the correct gear AFTER crossing over the speed bump. My wife's VW DSG based car gets into the right gear BEFORE the speed bump - awesome. I want it the same in my 4L60e implementation - BEFORE the speed bump.
One method of achieving this is to bring the downshift point earlier (at a higher speed than required by the gear map) based on the derivative of the vehicle speed, VssDot. The faster you decelerate (the more negative VssDot), the earlier it downshifts, all tuneable of course. This would also result in the box behaving more sporty the sportier you drive - without map switching.
I live in an area with many "traffic calming speed bumps". This requires frequent reduction in speed after obtaining Vmax from the previous speed bump. My daughter's S40 Volvo is most frustrating in this area as it only initiates a shift to the correct gear AFTER crossing over the speed bump. My wife's VW DSG based car gets into the right gear BEFORE the speed bump - awesome. I want it the same in my 4L60e implementation - BEFORE the speed bump.
One method of achieving this is to bring the downshift point earlier (at a higher speed than required by the gear map) based on the derivative of the vehicle speed, VssDot. The faster you decelerate (the more negative VssDot), the earlier it downshifts, all tuneable of course. This would also result in the box behaving more sporty the sportier you drive - without map switching.