Good grief...I need to correct my own post. Turns out that slowing down 10 MPH will cause a "downshift." But 5 MPH didn't...at least not on a level straight-away. Aww, who knows? Maybe gazuccio is right...maye it is a glitch. Whatever the explanation, I'm fascinated. Still love this car.Slap it over to manual mode, then up-shift to 6th. I take no credit for that. I'm not convinced it's a glitch, though. Now, I'm no engineer, but I suspect this might be on purpose...think about it this way, you've got dynamic cruise control, or whatever you call it, right? And the whole point of that is for the car to be able to slow down AND SPEED UP without driver inputs to the brake and throttle. I think maybe that extra 400-500 RPMs makes a lot of difference in terms of acceleration. Right about now you're scratching your head, and you're thinking, "What??? It's an automatic transmission...with a CVT, no less! Why should it matter what ratio is in play when I'm cruising? When it needs to accelerate, it should just do what it needs to do!" Well, I'm not so sure it does that. Here's an experiment I did: Normal mode, full auto, cruise set to 75. Creep up behind a car, wait for it to slow down about 10 MPH. Now, pull out into the passing lane and watch the tachometer. It doesn't really seem like it "down-shifts," or changes the ratio in any significant way. It just sort of speeds back up. Next, repeat the same experiment, except this time, with the tranny in manual mode, up-shifted to 6th. Pull out into the passing lane and watch the tachometer again...no down-shift. Just a much slower acceleration. Maybe there's some threshold, like if it's on a steep uphill or something. Anyway, I got the sense that the software is set up to try to stay in the cruising "gear." If that's true, the slightly higher ratio in auto mode may not be a mistake.
The most fuel efficient range for an engine is low rpm and high load. Least fuel efficient is high rpm and high load. Like a diesel engine. in a world of dsg's, lockup torque converters, manual transmissions and efficient cvt's I don't see how this damages or wears a drivetrain quicker. Back in the day when torque converters would not lock I would agree with this statement but maybe I don't fully understand what you are suggesting. Can you explain? Thanks.It's not good to force the engine to move forward if it isn't in the torque range.
I think what I was trying to say is.. Say for example you are going up a steep hill.. If you stay in 6th gear and bog the engine down to 1000rpm to save gas. It's not good for the car. You need to downshift to let the engine be in the right gearing to have the power to get up the hill. I know if you are trying to save gas you want to stay at lower rpms but don't take this to the extreme. If you need to get up and over something or pass someone you need to shift down. Or else we would all start in 6th gear and stay in 6th all day long.The most fuel efficient range for an engine is low rpm and high load. Least fuel efficient is high rpm and high load. Like a diesel engine. in a world of dsg's, lockup torque converters, manual transmissions and efficient cvt's I don't see how this damages or wears a drivetrain quicker. Back in the day when torque converters would not lock I would agree with this statement but maybe I don't fully understand what you are suggesting. Can you explain? Thanks.
Haha! "Driver intelligence..." Classic! My car doesn't have a gauge for that, but if it did, the needle would be pointing pretty close to "E!"The ICC works fine in manual mode 6th gear for slowing the vehicle. If the car ahead speeds up and your acceleration in 6th is too slow for you, just throw it back into D. Once you are up to speed again, throw it back into 6M. Worked well for a 15 mile trip for me today! It takes some driver intelligence to assist the intelligent cruise control, but this will save gas in the long run.