Team-BHP > Under the Hood > Technical Stuff


Reply
 
Thread Tools Search this Thread
Old 15th January 2018, 10:01   #361
BHPian
 
Join Date: Dec 2013
Location: Pune
Posts: 827
Thanked: 1,372 Times
Default Re: Tips on driving an Automatic

Quote:
Originally Posted by travelwriter View Post
I have seen that, when I am going downhill at constant speed, the engine revs to nearly 3K while the speed remains constant.
The european automatic gearboxes are programmed to give you some amount of engine braking at all times. VW dsg's down shift when you brake, and hold low gear on descents.
My Ecosport doesn't shift beyond 4th gear while descending ghats holding about 2500rpm on descents. This is adequate for Pune Mumbai Exp way, but not for other 2 lane ghats. On flat roads it upshifts at 2000 except 5th to 6th which happens at 2500.
Hyundai 6 speed gives you engine braking only on demand. Shift to manual and double downshift, it downshifts and also locks the torque converter so engine revs rise and you get engine braking.
The Crysta AT has sequential limiter. That is you shift to S mode, and use a toggle button on gear handle to limit highest gear you want to upshift too.
Hexa has a very passive control. If you are aproaching a toll booth, and are at about 80 in 6th, just leave the throttle and touch the brake, you will feel a single down shift to 5th, and much later to 4th, or may be even to 3rd if you have adequate distance.
Every automatic has something for control, you only have to read the manual thoroughly to understand, most of the ill informed sales executives will not tell you anything.

Rahul
Rahul Rao is offline   (5) Thanks Reply With Quote
Old 16th January 2018, 17:54   #362
BHPian
 
d_himan's Avatar
 
Join Date: Nov 2006
Location: Bombay
Posts: 803
Thanked: 760 Times
Default Re: Tips on driving an Automatic

Quote:
Originally Posted by Rahul Rao View Post
The european automatic gearboxes are programmed to give you some amount of engine braking at all times. VW dsg's down shift when you brake, and hold low gear on descents.
My Ecosport doesn't shift beyond 4th gear while descending ghats holding about 2500rpm on descents. This is adequate for Pune Mumbai Exp way, but not for other 2 lane ghats. On flat roads it upshifts at 2000 except 5th to 6th which happens at 2500.
Hyundai 6 speed gives you engine braking only on demand. Shift to manual and double downshift, it downshifts and also locks the torque converter so engine revs rise and you get engine braking.
The Crysta AT has sequential limiter. That is you shift to S mode, and use a toggle button on gear handle to limit highest gear you want to upshift too.
Hexa has a very passive control. If you are aproaching a toll booth, and are at about 80 in 6th, just leave the throttle and touch the brake, you will feel a single down shift to 5th, and much later to 4th, or may be even to 3rd if you have adequate distance.
Every automatic has something for control, you only have to read the manual thoroughly to understand, most of the ill informed sales executives will not tell you anything.

Rahul
Interesting, just to add, the Baleno CVT also has pretty aggressive engine braking in normal city driving with no inclines ..almost as aggressive as the DQ200 DSG.
d_himan is offline   Reply With Quote
Old 16th January 2018, 19:58   #363
Distinguished - BHPian
 
Join Date: Oct 2012
Location: Delhi
Posts: 4,251
Thanked: 12,900 Times
Default Re: Tips on driving an Automatic

Quote:
Originally Posted by Rahul Rao View Post
The european automatic gearboxes are programmed to give you some amount of engine braking at all times.
Never knew, never noticed either, but I will give it a try next time I'm descending. As I currently in, a very flat, the Netherlands it might be a while.

But don't just about all autoboxes have some form of slotting the box into a lower gear. It's not just P, R, N, D? On my (old) jaguar with a a five gear autobox i can manually select 2,3,4. On our Ford I can select any gear as well.

Also on this one:
Quote:
I have seen that, when I am going downhill at constant speed, the engine revs to nearly 3K while the speed remains constant
I dont see any problems with revs at 3K and the speed remaining constant. taht's just how you want to descent.
Even on a diesel 3K is no problem, much better than braking!

Only if you have an (very) old two stroke engine, prolonged engine braking can cause (big) problems.

Jeroen
Jeroen is offline   Reply With Quote
Old 23rd August 2018, 21:29   #364
BHPian
 
Join Date: Nov 2007
Location: Pune
Posts: 656
Thanked: 216 Times
Default Re: Tips on driving an Automatic

Is there a way disable creep feature in Drive mode in automatics?

I haven't used automatics, but while having a discussion on benefits of auto like, to be able to rest left leg, with a relative who mostly drove automatics, got a different perspective. Now instead of using left leg, you'll have to keep using right leg and press/depress brake to control movement.

When I try to visualize my driving, in bumper to bumper traffic, I use brake only when it is a slope or an incline. So in manual transmission, my right leg is relaxed.

So I was thinking if there is a way to disable creep feature, I could use accelerator to move the vehicle ahead as needed but won't need to keep the brake pedal pressed all the time.
shipnil is offline   (1) Thanks Reply With Quote
Old 23rd August 2018, 21:46   #365
Senior - BHPian
 
Join Date: Nov 2007
Location: Bangalore
Posts: 2,782
Thanked: 1,332 Times
Default Re: Tips on driving an Automatic

Quote:
Originally Posted by shipnil View Post

When I try to visualize my driving, in bumper to bumper traffic, I use brake only when it is a slope or an incline. So in manual transmission, my right leg is relaxed.
Even I have felt that when you drive an AT, your right leg is overworked, while left leg doesn't share any load Creep function is an irritant at times.
Guna is online now   Reply With Quote
Old 23rd August 2018, 22:03   #366
Senior - BHPian
 
blackasta's Avatar
 
Join Date: Aug 2009
Location: WB 26
Posts: 3,229
Thanked: 2,255 Times
Default Re: Tips on driving an Automatic

Quote:
Originally Posted by shipnil View Post
Is there a way disable creep feature in Drive mode in automatics?

I haven't used automatics, but while having a discussion on benefits of auto like, to be able to rest left leg, with a relative who mostly drove automatics, got a different perspective. Now instead of using left leg, you'll have to keep using right leg and press/depress brake to control movement.

When I try to visualize my driving, in bumper to bumper traffic, I use brake only when it is a slope or an incline. So in manual transmission, my right leg is relaxed.

So I was thinking if there is a way to disable creep feature, I could use accelerator to move the vehicle ahead as needed but won't need to keep the brake pedal pressed all the time.
Quote:
Originally Posted by Guna View Post
Even I have felt that when you drive an AT, your right leg is overworked, while left leg doesn't share any load Creep function is an irritant at times.
You wouldn't want to disable the creep function in an AT car, that's poor man's hill hold !

Also - on flat terrain, if you plan to stay put in a place for longer than 10 seconds, slot the lever to N - no need to keep the brake pressed. Once you wanna move, slot it to D and creep forward. There's a reason why in AT cars, the N<->D movement is not gated/restricted.
blackasta is offline   (4) Thanks Reply With Quote
Old 24th August 2018, 10:53   #367
BHPian
 
Join Date: Nov 2007
Location: Pune
Posts: 656
Thanked: 216 Times
Default Re: Tips on driving an Automatic

Quote:
Originally Posted by blackasta View Post
Also - on flat terrain, if you plan to stay put in a place for longer than 10 seconds, slot the lever to N - no need to keep the brake pressed.
I feel if I have to tinker with gear level as well in addition using brake similar to clutch in the manual, there won't be big benefit of moving to an auto, especially in bumper to bumper traffic.

Asking all these questions, as I am contemplating moving to auto for convenience and comfort.

BTW, the CVT in scooters is different from cars. There is no creep. It only moves forward if given accelerator.
shipnil is offline   (1) Thanks Reply With Quote
Old 24th August 2018, 11:41   #368
BHPian
 
manim's Avatar
 
Join Date: Aug 2008
Location: Tuticorin
Posts: 741
Thanked: 406 Times
Default Re: Tips on driving an Automatic

Quote:
Originally Posted by blackasta View Post
Also - on flat terrain, if you plan to stay put in a place for longer than 10 seconds, slot the lever to N - no need to keep the brake pressed
Even on a flat terrain, I would pull the hand-brake when I put in 'N', for safety reasons.
manim is offline   Reply With Quote
Old 24th August 2018, 11:48   #369
Senior - BHPian
 
blackasta's Avatar
 
Join Date: Aug 2009
Location: WB 26
Posts: 3,229
Thanked: 2,255 Times
Default Re: Tips on driving an Automatic

Quote:
Originally Posted by manim View Post
Even on a flat terrain, I would pull the hand-brake when I put in 'N', for safety reasons.
If you are in stagnant traffic in between stationary cars, sure - even I sometimes do it while I fiddle with my phone.
But I generally avoid the same if I am the last car - you never know when that careless driver hits you from behind (and I've faced this myself) - and having the handbrakes on would basically result in the car absorbing more of the impact instead of rolling ahead (again rolling ahead has it's own share of issues including hitting the car in front).
blackasta is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Driving in India after driving outside (abroad) - tips to avoid common mistakes mmxylorider Drive Safe 26 3rd January 2019 00:33
The Driving Tips Thread normally_crazy Drive Safe 43 17th September 2011 21:49
Tips to drive better: But are the tips correct? Spinnerr Technical Stuff 11 22nd June 2009 13:00
Driving Tips.. karthik247 Technical Stuff 3 17th April 2005 16:32
INFO : Tips on driving in Fog Technocrat The Indian Car Scene 2 1st February 2005 10:19


All times are GMT +5.5. The time now is 14:46.

Copyright ©2000 - 2019, Team-BHP.com
Proudly powered by E2E Networks