Cruise control dynamics...

agarbati · 10-29-2005, 11:33 PM

I just noticed that if you pull the cruise control lever to decelerate and then go past the resistance for a continued deceleration the cruise controller actually applies the brakes to achieve your desired cruising speed instead of coasting to your speed.

I was cruising at 75 and decided to slow down to 55 in a speed trap area and just pulled the cruise control lever to get it down to 55. I was expecting it to coast but it actually actively applied the brakes to get to 55. I know it was the brakes because the rpm stayed constant so the controller was not downshifting the tranny to slow down.

Nice - never saw that before.

David328M-Sport · 10-29-2005, 11:38 PM

Being a metric car, it drops my speed by 10km/h each time you pull it past the resistance point and 1km/h up to the resitance point. What about mph cars? Would it be 5mph? I think 10mph would be quite dramatic.

puck724 · 10-29-2005, 11:44 PM

its 5mph after the resistance point. i think.

voltron1011 · 10-30-2005, 10:50 AM

On my manual transmission car, I like how I can shift gears (up/down) and the cruise control continues to work. Most other cars cancel the cruise once you tap the clutch (or brake). This comes in handy when you are driving up a steep hill and need to downshift.

silverado · 10-30-2005, 01:56 PM

Quote:

Originally Posted by agarbati

I just noticed that if you pull the cruise control lever to decelerate and then go past the resistance for a continued deceleration the cruise controller actually applies the brakes to achieve your desired cruising speed instead of coasting to your speed.

I was cruising at 75 and decided to slow down to 55 in a speed trap area and just pulled the cruise control lever to get it down to 55. I was expecting it to coast but it actually actively applied the brakes to get to 55. I know it was the brakes because the rpm stayed constant so the controller was not downshifting the tranny to slow down.

Nice - never saw that before.

Yes, it definitely applies the brakes. Also, if the car is on a forward incline, the brakes will be applied as needed to keep you at the set speed.

Broken1 · 10-30-2005, 02:41 PM

:-( My 4pot diesel doesn't have the "fancy" cruise control....ahh well...

10-29-2005, 11:33 PM	#1
agarbati Second Lieutenant 39 Rep 279 Posts Drives: E90, Saph Blk 330i Join Date: Apr 2005 Location: Minneapolis iTrader: (0)	Cruise control dynamics... I just noticed that if you pull the cruise control lever to decelerate and then go past the resistance for a continued deceleration the cruise controller actually applies the brakes to achieve your desired cruising speed instead of coasting to your speed. I was cruising at 75 and decided to slow down to 55 in a speed trap area and just pulled the cruise control lever to get it down to 55. I was expecting it to coast but it actually actively applied the brakes to get to 55. I know it was the brakes because the rpm stayed constant so the controller was not downshifting the tranny to slow down. Nice - never saw that before.
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10-29-2005, 11:38 PM	#2
David328M-Sport Brigadier General 101 Rep 3,566 Posts Drives: F30 M-Sport 328i Estoril Blue Join Date: Jun 2005 Location: Melbourne Australia iTrader: (0)	Being a metric car, it drops my speed by 10km/h each time you pull it past the resistance point and 1km/h up to the resitance point. What about mph cars? Would it be 5mph? I think 10mph would be quite dramatic. __________________ 328i M-Sport, Estoril Blue, Carbon XP 35 Tint, front heated seats, black Dakota, Sports Suspension, Anthracite Headliner, HUD, Pro Nav, Sunroof, hk 600w, Bi-Xenon, 19" 403M wheels, Reversing Camera, DAB+, Xenon, BT Ext Connect, MST turbo intake pipe, MST Cold Air Intake, JB4 on Map 2 with Catless DP produces awesome performance in Sport.
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10-29-2005, 11:44 PM	#3
puck724 COLTS 4 LIFE!!! 99 Rep 1,746 Posts Drives: 2006 330i Join Date: Aug 2005 Location: california iTrader: (1) Garage List 2006 330i [0.00]	its 5mph after the resistance point. i think. __________________ 2006 330i --sapphire black--black leather --alumminum trim --premium package --cold weather package --park distace control --automatic transmission --navigation with iDrive
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10-30-2005, 10:50 AM	#4
voltron1011 Colonel 119 Rep 2,909 Posts Drives: 2011 135i, FJR-1300 Join Date: Apr 2005 Location: Wiesbaden iTrader: (2)	On my manual transmission car, I like how I can shift gears (up/down) and the cruise control continues to work. Most other cars cancel the cruise once you tap the clutch (or brake). This comes in handy when you are driving up a steep hill and need to downshift.
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10-30-2005, 02:41 PM	#6
Broken1 Addict 203 Rep 2,074 Posts Drives: 2024 X5 40i M-Sport Join Date: May 2005 Location: Ontario iTrader: (0)	:-( My 4pot diesel doesn't have the "fancy" cruise control....ahh well...
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