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-   -   Focus Ti's Sport mode rolling downhill (http://www.focusfanatics.com/forum/showthread.php?t=327767)

narkotskyb 11-03-2013 09:31 PM

Focus Ti's Sport mode rolling downhill
 
Here is the scenario:

Pick a long and quite steep downhill (say 5 degrees and more)
Accelerate to about 40-50 miles before downhill starts then just let car roll downhill in "D" (do not touch accelerator) - it will stay in 6th gear and just roll and will most likely accelerate due to the grade.

Try the same thing in "S" and car will downshift after about 5-10 secs into either 4 or in my case 3 gear (engine will obviously rev up) and will drive like this all the way down - it will perform automatic engine braking.


So the ? being is DCT behaving as designed or not? I asked dealership and was told it is but somehow/somewhere it still reeks of BS for me. This is just a regular car - I would understand engine braking programmed into heavy duty trucks' transmission but Focus?

Anyone else came across this or willing to try to reproduce it?

[???:)]

scott7278 11-03-2013 09:43 PM

It will do that with cruise control, too. I'm not really a fan of it, to be honest.

dyn085 11-03-2013 09:49 PM

Quote:

Originally Posted by scott7278 (Post 4918136)
It will do that with cruise control, too. I'm not really a fan of it, to be honest.

This x2. Performing as intended, whether we like it or not.

TKG26 11-03-2013 10:15 PM

Believe its normal... In sport mode t keeps the revs up

Sent from my SAMSUNG-SGH-I747 using FF Mobile

NickCornell 11-03-2013 10:39 PM

Quote:

Originally Posted by narkotskyb (Post 4918123)
Here is the scenario:

Pick a long and quite steep downhill (say 5 degrees and more)
Accelerate to about 40-50 miles before downhill starts then just let car roll downhill in "D" (do not touch accelerator) - it will stay in 6th gear and just roll and will most likely accelerate due to the grade.

Try the same thing in "S" and car will downshift after about 5-10 secs into either 4 or in my case 3 gear (engine will obviously rev up) and will drive like this all the way down - it will perform automatic engine braking.


So the ? being is DCT behaving as designed or not? I asked dealership and was told it is but somehow/somewhere it still reeks of BS for me. This is just a regular car - I would understand engine braking programmed into heavy duty trucks' transmission but Focus?

Anyone else came across this or willing to try to reproduce it?

[???:)]

It's downshifting so you can accelerate quicker since you're on a sport mode

NickCornell 11-03-2013 10:40 PM

Quote:

Originally Posted by dyn085 (Post 4918144)
This x2. Performing as intended, whether we like it or not.

Wait what? It does not do this with CC on my car

scott7278 11-03-2013 10:53 PM

Quote:

Originally Posted by NickCornell (Post 4918189)
Wait what? It does not do this with CC on my car

It does with mine on a long, steep hill...I have to cancel it to get it to stop. I understand the purpose, but it is so loud that it's embarrassing, like the transmission broke or something.

It did it coming back from a Mizzou game with my Dad - the look on his face was priceless. He thought the engine was going to blow up.

NickCornell 11-03-2013 10:55 PM

If you're in CC with the car in select shift mode in 6th gear the car will absolutely not downshift

Romans5.8 11-03-2013 11:33 PM

First off, big trucks don't engine brake. At least, not like your car does. We're talking about an engine that is about to explode when it hits 3,000 RPM's and a TON of weight behind it. They do use 'jake brakes' though, which stay at the same RPM (no downshift needed) but use a series of valves to basically turn the engine into a giant (and noisy) air compressor to give it the resistance needed to actually slow the truck down and prevent overheating the brakes.

Second, in sport mode, it's not a normal car. Normal, every day driving is for normal, every day mode. Sport driving is for... well you can take it from here!

And yes, it's the way it's programmed, and for 'sport' driving, it's the way it SHOULD behave. Keeping the engine revs up and in the powerband so the power is there instantly, should you need it. Just hit the accelerator, and go.

Finally, engine braking is something people have done, even in small cars and even on motorcycles (nearly all motorcycles are manual transmission) for a long time. Personally, I think brakes are cheap and a piece of cake to change. BUT, some people like to engine brake. Engine braking is not generally to 'increase' your braking performance. The brakes applied to the drive wheels will stop a lot harder than the engine will. Engine braking is to ease up on your brakes. It IS useful on long, steep grades (like coming down a mountain), to keep your brakes from overheating and/or rotors from warping. If you select the right gear you should be able to maintain a more/less constant speed with minimal throttle inputs and no brake while going down a steep grade.

Joeywhat 11-04-2013 05:59 AM

Quote:

Originally Posted by NickCornell (Post 4918201)
If you're in CC with the car in select shift mode in 6th gear the car will absolutely not downshift

Sport mode, not select shift.


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