Quote:
Originally Posted by Cardinal Grammeter
This is a huge thread and I hope I'm not repeating the obvious...
I drove a Scion xb that had instantaneous mpg display.
Much to my shock, it became crystal clear that mpg was a simple function of Throttle Position. So if you wanted to drive at a constant 45 mpg, you would set your throttle position to get that mpg and simply hold it up and down hills.
So for constant mpg, a simple hand control would be the proper controller.
Regards,
Tom
|
I drive a 2008 2nd Gen xB automatic, and I see a similar behavior. Say I've got up to 42 mph and let the auto lock up in 4th. So at a given constant accelerator position where the instantaneous mpg reads 20 mpg, the car will accelerate moderately from 42 mph all the way to say 55 mph and the mpg will display about a constant 20 mpg for the duration of that 13 mph speed increase. I then ease off the gas pedal to maintain 55 mph. So when keeping the gas pedal constant the FI duty cycle and actual throttle must be opening as speed increases otherwise mpg would go up proportional to speed. So all I need is just to keep a steady foot going up hill such as not to cause a downshift or exit TC lock up.