"Stephen R. Conrad" <sconrad@telecommunity.to> wrote in message
news:2ronnfF1cpl9sU1@uni-berlin.de...
> Why doesn't the ABS see the spinning tire and try to slow it down by
> applying that tire's brake?

That would be "traction control".

JoBo

> "Jerry Bransford" <jerrypb@***.net> wrote in message
> news:yQ2Yc.159033$sh.115904@fed1read06...
> > One thing a limited slip differential does 'not' do is shift power to
one
> > side or the other. All it does is couple the spinning side to the
> > non-spinning side a little via its clutch pack so the resistance of the
> tire
> > with better traction allows more torque to be sent to both tires. Both
> > tires always, always, ALWAYS see exactly 50% of the torque sent to the
> rear
> > axle by the engine. It's just that when one tire starts spinning on an
> open
> > differential, the engine only sees the resistance of the spinning tire
so
> it
> > develops very little torque and thus very little torque gets provided to
> the
> > tire that still has good traction. The more resistance the engine sees,
> the
> > more torque it develops... so when the LSD couples the spinning tire to
> the
> > tire that is not spinning, it sees more resistance and thus develops
more
> > torque... which gives the tire with more traction more power so it gets
> you
> > going again. This is why stepping on the brakes a little when you're
> stuck,
> > or pulling the parking brake on a little if it's a rear tire that is
> > spinning, will often get you moving again since it provides more
> resistance
> > for the engine to work into which raises the amount of torque being sent
> to
> > both tires.
> >
> > So when one tire is spinning, it's not that the differential is sending
> > "all" of the power to the spinning tire... it's really sending a 50:50
> split
> > to both sides... but with one tire spinning, the engine sees so little
> > resistance that very little torque is developed and when that very
little
> > torque is split 50:50 to both sides, the side with traction isn't
getting
> > enough torque to move the vehicle... thus you're stuck.
> >
> > The fact that both tires always see 50% of the 'available' torque, no
> matter
> > if it's equipped with a locker, LSD, or just an open axle is the hardest
> > thing for most people to understand. It's just how much torque is
really
> > available to those tires that determine if you're going to be able to
move
> > or not. :)
> >
> > Jerry
> > --
> > --
> > Jerry Bransford
> > PP-ASEL N6TAY
> > See the Geezer Jeep at
> > http://members.***.net/jerrypb/
> > "Handywired" <handywired@aol.com> wrote in message
> > news:20040828033849.19087.00004249@mb-m06.aol.com...
> > >
> > >> Pricing out on edmunds my car. What exactly does the
> > >> limited
> > >>slip differential option do on a jeep, and is it preferable to have
it?
> > >
> > > Yeah, it's a good thing. It shifts some power to the tire with more
> > > traction
> > > when the rear tires have unequal traction. Otherwise, with an open
> > > differential, if you say had one rear tire on an ice patch, and one on
> dry
> > > pavement, an open differential will literally send all the power to
the
> > > wheel
> > > with NO traction and you'll sit there spinning...
> > >
> > > However the Jeep Traklock is nothing to get too excited about. It's
> > > clutch-based and will wear out. But it'll last 60 or 80K miles and
> > > that's
> > > probably about when most people who buy new cars sell 'em anyway
> (wouldn't
> > > know
> > > <g>)...
> > >
> > > -jeff
> >
> >
>
>

 

"Stephen R. Conrad" <sconrad@telecommunity.to> wrote in message
news:2ronnfF1cpl9sU1@uni-berlin.de...
> Why doesn't the ABS see the spinning tire and try to slow it down by
> applying that tire's brake?

That would be "traction control".

JoBo

> "Jerry Bransford" <jerrypb@***.net> wrote in message
> news:yQ2Yc.159033$sh.115904@fed1read06...
> > One thing a limited slip differential does 'not' do is shift power to
one
> > side or the other. All it does is couple the spinning side to the
> > non-spinning side a little via its clutch pack so the resistance of the
> tire
> > with better traction allows more torque to be sent to both tires. Both
> > tires always, always, ALWAYS see exactly 50% of the torque sent to the
> rear
> > axle by the engine. It's just that when one tire starts spinning on an
> open
> > differential, the engine only sees the resistance of the spinning tire
so
> it
> > develops very little torque and thus very little torque gets provided to
> the
> > tire that still has good traction. The more resistance the engine sees,
> the
> > more torque it develops... so when the LSD couples the spinning tire to
> the
> > tire that is not spinning, it sees more resistance and thus develops
more
> > torque... which gives the tire with more traction more power so it gets
> you
> > going again. This is why stepping on the brakes a little when you're
> stuck,
> > or pulling the parking brake on a little if it's a rear tire that is
> > spinning, will often get you moving again since it provides more
> resistance
> > for the engine to work into which raises the amount of torque being sent
> to
> > both tires.
> >
> > So when one tire is spinning, it's not that the differential is sending
> > "all" of the power to the spinning tire... it's really sending a 50:50
> split
> > to both sides... but with one tire spinning, the engine sees so little
> > resistance that very little torque is developed and when that very
little
> > torque is split 50:50 to both sides, the side with traction isn't
getting
> > enough torque to move the vehicle... thus you're stuck.
> >
> > The fact that both tires always see 50% of the 'available' torque, no
> matter
> > if it's equipped with a locker, LSD, or just an open axle is the hardest
> > thing for most people to understand. It's just how much torque is
really
> > available to those tires that determine if you're going to be able to
move
> > or not. :)
> >
> > Jerry
> > --
> > --
> > Jerry Bransford
> > PP-ASEL N6TAY
> > See the Geezer Jeep at
> > http://members.***.net/jerrypb/
> > "Handywired" <handywired@aol.com> wrote in message
> > news:20040828033849.19087.00004249@mb-m06.aol.com...
> > >
> > >> Pricing out on edmunds my car. What exactly does the
> > >> limited
> > >>slip differential option do on a jeep, and is it preferable to have
it?
> > >
> > > Yeah, it's a good thing. It shifts some power to the tire with more
> > > traction
> > > when the rear tires have unequal traction. Otherwise, with an open
> > > differential, if you say had one rear tire on an ice patch, and one on
> dry
> > > pavement, an open differential will literally send all the power to
the
> > > wheel
> > > with NO traction and you'll sit there spinning...
> > >
> > > However the Jeep Traklock is nothing to get too excited about. It's
> > > clutch-based and will wear out. But it'll last 60 or 80K miles and
> > > that's
> > > probably about when most people who buy new cars sell 'em anyway
> (wouldn't
> > > know
> > > <g>)...
> > >
> > > -jeff
> >
> >
>
>

 

ABS doesn't apply brakes, it releases them when it senses a wheel has
stopped spinning from a brake that is locked up. There are other systems
that sense spinning tires and apply the brake to the offending wheel but
they are not ABS systems.

Jerry
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
"Stephen R. Conrad" <sconrad@telecommunity.to> wrote in message
news:2ronnfF1cpl9sU1@uni-berlin.de...
> Why doesn't the ABS see the spinning tire and try to slow it down by
> applying that tire's brake?
>
> "Jerry Bransford" <jerrypb@***.net> wrote in message
> news:yQ2Yc.159033$sh.115904@fed1read06...
>> One thing a limited slip differential does 'not' do is shift power to one
>> side or the other. All it does is couple the spinning side to the
>> non-spinning side a little via its clutch pack so the resistance of the
> tire
>> with better traction allows more torque to be sent to both tires. Both
>> tires always, always, ALWAYS see exactly 50% of the torque sent to the
> rear
>> axle by the engine. It's just that when one tire starts spinning on an
> open
>> differential, the engine only sees the resistance of the spinning tire so
> it
>> develops very little torque and thus very little torque gets provided to
> the
>> tire that still has good traction. The more resistance the engine sees,
> the
>> more torque it develops... so when the LSD couples the spinning tire to
> the
>> tire that is not spinning, it sees more resistance and thus develops more
>> torque... which gives the tire with more traction more power so it gets
> you
>> going again. This is why stepping on the brakes a little when you're
> stuck,
>> or pulling the parking brake on a little if it's a rear tire that is
>> spinning, will often get you moving again since it provides more
> resistance
>> for the engine to work into which raises the amount of torque being sent
> to
>> both tires.
>>
>> So when one tire is spinning, it's not that the differential is sending
>> "all" of the power to the spinning tire... it's really sending a 50:50
> split
>> to both sides... but with one tire spinning, the engine sees so little
>> resistance that very little torque is developed and when that very little
>> torque is split 50:50 to both sides, the side with traction isn't getting
>> enough torque to move the vehicle... thus you're stuck.
>>
>> The fact that both tires always see 50% of the 'available' torque, no
> matter
>> if it's equipped with a locker, LSD, or just an open axle is the hardest
>> thing for most people to understand. It's just how much torque is really
>> available to those tires that determine if you're going to be able to
>> move
>> or not. :)
>>
>> Jerry
>> --
>> --
>> Jerry Bransford
>> PP-ASEL N6TAY
>> See the Geezer Jeep at
>> http://members.***.net/jerrypb/
>> "Handywired" <handywired@aol.com> wrote in message
>> news:20040828033849.19087.00004249@mb-m06.aol.com...
>> >
>> >> Pricing out on edmunds my car. What exactly does the
>> >> limited
>> >>slip differential option do on a jeep, and is it preferable to have it?
>> >
>> > Yeah, it's a good thing. It shifts some power to the tire with more
>> > traction
>> > when the rear tires have unequal traction. Otherwise, with an open
>> > differential, if you say had one rear tire on an ice patch, and one on
> dry
>> > pavement, an open differential will literally send all the power to the
>> > wheel
>> > with NO traction and you'll sit there spinning...
>> >
>> > However the Jeep Traklock is nothing to get too excited about. It's
>> > clutch-based and will wear out. But it'll last 60 or 80K miles and
>> > that's
>> > probably about when most people who buy new cars sell 'em anyway
> (wouldn't
>> > know
>> > <g>)...
>> >
>> > -jeff
>>
>>
>
>

 

ABS doesn't apply brakes, it releases them when it senses a wheel has
stopped spinning from a brake that is locked up. There are other systems
that sense spinning tires and apply the brake to the offending wheel but
they are not ABS systems.

Jerry
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
"Stephen R. Conrad" <sconrad@telecommunity.to> wrote in message
news:2ronnfF1cpl9sU1@uni-berlin.de...
> Why doesn't the ABS see the spinning tire and try to slow it down by
> applying that tire's brake?
>
> "Jerry Bransford" <jerrypb@***.net> wrote in message
> news:yQ2Yc.159033$sh.115904@fed1read06...
>> One thing a limited slip differential does 'not' do is shift power to one
>> side or the other. All it does is couple the spinning side to the
>> non-spinning side a little via its clutch pack so the resistance of the
> tire
>> with better traction allows more torque to be sent to both tires. Both
>> tires always, always, ALWAYS see exactly 50% of the torque sent to the
> rear
>> axle by the engine. It's just that when one tire starts spinning on an
> open
>> differential, the engine only sees the resistance of the spinning tire so
> it
>> develops very little torque and thus very little torque gets provided to
> the
>> tire that still has good traction. The more resistance the engine sees,
> the
>> more torque it develops... so when the LSD couples the spinning tire to
> the
>> tire that is not spinning, it sees more resistance and thus develops more
>> torque... which gives the tire with more traction more power so it gets
> you
>> going again. This is why stepping on the brakes a little when you're
> stuck,
>> or pulling the parking brake on a little if it's a rear tire that is
>> spinning, will often get you moving again since it provides more
> resistance
>> for the engine to work into which raises the amount of torque being sent
> to
>> both tires.
>>
>> So when one tire is spinning, it's not that the differential is sending
>> "all" of the power to the spinning tire... it's really sending a 50:50
> split
>> to both sides... but with one tire spinning, the engine sees so little
>> resistance that very little torque is developed and when that very little
>> torque is split 50:50 to both sides, the side with traction isn't getting
>> enough torque to move the vehicle... thus you're stuck.
>>
>> The fact that both tires always see 50% of the 'available' torque, no
> matter
>> if it's equipped with a locker, LSD, or just an open axle is the hardest
>> thing for most people to understand. It's just how much torque is really
>> available to those tires that determine if you're going to be able to
>> move
>> or not. :)
>>
>> Jerry
>> --
>> --
>> Jerry Bransford
>> PP-ASEL N6TAY
>> See the Geezer Jeep at
>> http://members.***.net/jerrypb/
>> "Handywired" <handywired@aol.com> wrote in message
>> news:20040828033849.19087.00004249@mb-m06.aol.com...
>> >
>> >> Pricing out on edmunds my car. What exactly does the
>> >> limited
>> >>slip differential option do on a jeep, and is it preferable to have it?
>> >
>> > Yeah, it's a good thing. It shifts some power to the tire with more
>> > traction
>> > when the rear tires have unequal traction. Otherwise, with an open
>> > differential, if you say had one rear tire on an ice patch, and one on
> dry
>> > pavement, an open differential will literally send all the power to the
>> > wheel
>> > with NO traction and you'll sit there spinning...
>> >
>> > However the Jeep Traklock is nothing to get too excited about. It's
>> > clutch-based and will wear out. But it'll last 60 or 80K miles and
>> > that's
>> > probably about when most people who buy new cars sell 'em anyway
> (wouldn't
>> > know
>> > <g>)...
>> >
>> > -jeff
>>
>>
>
>

 

ABS doesn't apply brakes, it releases them when it senses a wheel has
stopped spinning from a brake that is locked up. There are other systems
that sense spinning tires and apply the brake to the offending wheel but
they are not ABS systems.

Jerry
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
"Stephen R. Conrad" <sconrad@telecommunity.to> wrote in message
news:2ronnfF1cpl9sU1@uni-berlin.de...
> Why doesn't the ABS see the spinning tire and try to slow it down by
> applying that tire's brake?
>
> "Jerry Bransford" <jerrypb@***.net> wrote in message
> news:yQ2Yc.159033$sh.115904@fed1read06...
>> One thing a limited slip differential does 'not' do is shift power to one
>> side or the other. All it does is couple the spinning side to the
>> non-spinning side a little via its clutch pack so the resistance of the
> tire
>> with better traction allows more torque to be sent to both tires. Both
>> tires always, always, ALWAYS see exactly 50% of the torque sent to the
> rear
>> axle by the engine. It's just that when one tire starts spinning on an
> open
>> differential, the engine only sees the resistance of the spinning tire so
> it
>> develops very little torque and thus very little torque gets provided to
> the
>> tire that still has good traction. The more resistance the engine sees,
> the
>> more torque it develops... so when the LSD couples the spinning tire to
> the
>> tire that is not spinning, it sees more resistance and thus develops more
>> torque... which gives the tire with more traction more power so it gets
> you
>> going again. This is why stepping on the brakes a little when you're
> stuck,
>> or pulling the parking brake on a little if it's a rear tire that is
>> spinning, will often get you moving again since it provides more
> resistance
>> for the engine to work into which raises the amount of torque being sent
> to
>> both tires.
>>
>> So when one tire is spinning, it's not that the differential is sending
>> "all" of the power to the spinning tire... it's really sending a 50:50
> split
>> to both sides... but with one tire spinning, the engine sees so little
>> resistance that very little torque is developed and when that very little
>> torque is split 50:50 to both sides, the side with traction isn't getting
>> enough torque to move the vehicle... thus you're stuck.
>>
>> The fact that both tires always see 50% of the 'available' torque, no
> matter
>> if it's equipped with a locker, LSD, or just an open axle is the hardest
>> thing for most people to understand. It's just how much torque is really
>> available to those tires that determine if you're going to be able to
>> move
>> or not. :)
>>
>> Jerry
>> --
>> --
>> Jerry Bransford
>> PP-ASEL N6TAY
>> See the Geezer Jeep at
>> http://members.***.net/jerrypb/
>> "Handywired" <handywired@aol.com> wrote in message
>> news:20040828033849.19087.00004249@mb-m06.aol.com...
>> >
>> >> Pricing out on edmunds my car. What exactly does the
>> >> limited
>> >>slip differential option do on a jeep, and is it preferable to have it?
>> >
>> > Yeah, it's a good thing. It shifts some power to the tire with more
>> > traction
>> > when the rear tires have unequal traction. Otherwise, with an open
>> > differential, if you say had one rear tire on an ice patch, and one on
> dry
>> > pavement, an open differential will literally send all the power to the
>> > wheel
>> > with NO traction and you'll sit there spinning...
>> >
>> > However the Jeep Traklock is nothing to get too excited about. It's
>> > clutch-based and will wear out. But it'll last 60 or 80K miles and
>> > that's
>> > probably about when most people who buy new cars sell 'em anyway
> (wouldn't
>> > know
>> > <g>)...
>> >
>> > -jeff
>>
>>
>
>

 

You're thinking of the Traction Control System, found on most rear
wheel drive Fords:
http://www.conti-online.com/generato...system_en.html
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

"Stephen R. Conrad" wrote:
>
> Why doesn't the ABS see the spinning tire and try to slow it down by
> applying that tire's brake?

 

You're thinking of the Traction Control System, found on most rear
wheel drive Fords:
http://www.conti-online.com/generato...system_en.html
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

"Stephen R. Conrad" wrote:
>
> Why doesn't the ABS see the spinning tire and try to slow it down by
> applying that tire's brake?

 

You're thinking of the Traction Control System, found on most rear
wheel drive Fords:
http://www.conti-online.com/generato...system_en.html
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

"Stephen R. Conrad" wrote:
>
> Why doesn't the ABS see the spinning tire and try to slow it down by
> applying that tire's brake?