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Midsize Sedans 2.0

13270 messages,  Last post on Nov 28, 2009 at 9:36 PM

You are in the Sedans Forum. Your Hosts are pat & karens

What is this discussion about? Hyundai Sonata, Toyota Camry, Honda Accord, Nissan Altima, Volkswagen Passat, Mazda MAZDA6, Ford Fusion, Chevrolet Malibu, Saturn Aura, Car Comparisons, Sedan


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#11148 of 13270
Re: 2009 Optima gets with the (ES)program [waygrabow] by robsis
Nov 05, 2008 (9:18 pm)
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Replying to: waygrabow (Nov 04, 2008 7:47 pm)

As a retired accident reconstructionist, I can say, professionally, that the combination of ABS, ESC, and Traction control have absolutely made the roads a safer environment. Add a good AWD to that mix with electronic brake force reduction, and you have the safest vehicle on the road, knucklehead driving notwithstanding!
#11149 of 13270
Re: 2009 Optima gets with the (ES)program [explorerx4] by kdshapiro
Nov 06, 2008 (4:05 am)
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Replying to: explorerx4 (Nov 04, 2008 3:17 pm)

That is not quite a correct statement. The purpose of ESC and all of the associated electronics is the keep the car going in the direction the steering wheel is pointed. It does that with a combination of engine control and individual ABS wheel control, something a driver cannot do, because a driver cannot modulate individual wheels.
 
If you are trucking down the highway and start to skid because you are hydroplaning ESC will kick in to help. Or if you are skidding on ice and snow ESC will kick in to help.
 
It has nothing to do with avoidance manuevers. It's sole purpose is to keep the car from slipping and sliding and to go where the front wheels are pointed, before you know you are about to skid.
#11150 of 13270
Re: 2009 Optima gets with the (ES)program [kdshapiro] by akirby
Nov 06, 2008 (7:07 am)
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Replying to: kdshapiro (Nov 06, 2008 4:05 am)

It has nothing to do with avoidance manuevers. It's sole purpose is to keep the car from slipping and sliding and to go where the front wheels are pointed, before you know you are about to skid.
 
It has everything to do with avoidance manuevers. ESC counteracts understeer and oversteer (in Nascar terms understeer is when the front of the car hits the wall and oversteer is when the back of the car hits the wall). When you make an emergency avoidance maneuver (lane change) ESC keeps the vehicle under control and prevents it from spinning out. Just look at all the ESC demonstrations and this should be obvious.
#11151 of 13270
Re: 2009 Optima gets with the (ES)program [kdshapiro] by baggs32
Nov 06, 2008 (10:08 am)
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Replying to: kdshapiro (Nov 06, 2008 4:05 am)

It does that with a combination of engine control and individual ABS wheel control
 
That varies from vehicle to vehicle. I know my Explorer uses both engine retardation and individual wheel braking for its ESC but I'm pretty sure the Fusion only used brakes.
 
Or if you are skidding on ice and snow ESC will kick in to help.
 
It will kick in on ice and snow but its effectiveness is limited on those types of surfaces.
 
I agree with akirby in that it is most useful in emergency maneuvers. If you are depending on ESC to save you in spirited driving then you have other that ESC will not help. Like oncoming traffic, guide rails, and trees to name a few. You can still move off the beaten path somewhat even though ESC is doing its job.
#11152 of 13270
Re: 2009 Optima gets with the (ES)program [akirby] by kdshapiro
Nov 06, 2008 (1:33 pm)
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Replying to: akirby (Nov 06, 2008 7:07 am)

It has everything to do with avoidance manuevers
 
It has nothing to do with avoidance maneuvers. If at any time the front or rear of the car is not going in the direction of the steering wheel ESC will kick in. There are various reasons skid could occur or could be about to occur that are not due to avoidance. Stupid driving in slick conditions is one example that comes to mind.
#11153 of 13270
Re: 2009 Optima gets with the (ES)program [baggs32] by kdshapiro
Nov 06, 2008 (1:36 pm)
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Replying to: baggs32 (Nov 06, 2008 10:08 am)

It will kick in on ice and snow but its effectiveness is limited on those types of surfaces.
 
As noted, ESC can't manufacture traction or go beyond physics. It's another safety device, of which stupidity can negate it's effectiveness.
#11154 of 13270
Re: 2009 Optima gets with the (ES)program [kdshapiro] by akirby
Nov 06, 2008 (2:23 pm)
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Replying to: kdshapiro (Nov 06, 2008 1:33 pm)

When you make an emergency lane change the potential exists for oversteer - the rear of the vehicle starts to slide out - which is usually followed by an overcorrection causing the vehicle to fishtail and possibly to spin out. ESC will absolutely, positively correct the oversteer and prevent fishtailing and loss of control. It doesn't have to be a slick surface to cause understeer or oversteer.
 
Go here and click on the 1.5 minute video on the right hand side. Almost every demonstration of ESC includes an emergency lane change.
#11155 of 13270
Re: 2009 Optima gets with the (ES)program [akirby] by kdshapiro
Nov 06, 2008 (3:09 pm)
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Replying to: akirby (Nov 06, 2008 2:23 pm)

akirby, you keep missing the point. It's not about emergency manuevers. It's about keeping the car going in the same direction as the front wheels are pointed. Oversteer, understeer whatever.
 
I'll repeat, one does not have to make an emergency manuever to have ESC kick in. I have some knowledge about ESC systems as my former car had one. ESC would kick in to keep the car from sliding or to stop the wheels from spinning.
#11156 of 13270
Re: 2009 Optima gets with the (ES)program [kdshapiro] by m6user
Nov 06, 2008 (4:01 pm)
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Replying to: kdshapiro (Nov 06, 2008 3:09 pm)

You guys are basically saying the same thing but are hung up on grammatics. Anytime I feel any slippage I am going to react and perform some sort of "avoidance or emergency manuever". It doesn't have to involve an emergency lane change.
#11157 of 13270
Re: 2009 Optima gets with the (ES)program [kdshapiro] by elroy5
Nov 06, 2008 (4:02 pm)
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Replying to: kdshapiro (Nov 06, 2008 3:09 pm)

ESC will help you control the car, regardless. It could be from an avoidance maneuver, or not. Any time the wheels loose traction, ESC will take action to stop it.
 
ESC, and all the other safety features have their value, and help reduce accidents. That's great! The question I have is, when is it too much. ESC, ABS, Airbags, Seatbelt tensioners, lane change sensors, crumple zones, etc, etc,. All these safety features are adding to the price of our cars, so where do we draw the line? When the safety features cost more than the rest of the car? We may be close to that point now.

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