When GM did this before(12-15 years ago?) I think the company was American Axle that produced the system. Bought their stock as soon as I heard about the rear steer system. Their shares had a nice bump up in price.
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Quadrasteer coming back?
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I wonder if you could crab steer with the truck? I know that i have seen both axles that steer on heavy equiptment such as telehandlers and rotomills.
Originally Posted By: csx7006
I wonder if you could crab steer with the truck? I know that i have seen both axles that steer on heavy equiptment such as telehandlers and rotomills.
In GM's Quadrasteer system at highway speeds the rear wheels would crab steer at a slight angle with the front wheels.
I wonder if you could crab steer with the truck? I know that i have seen both axles that steer on heavy equiptment such as telehandlers and rotomills.
In GM's Quadrasteer system at highway speeds the rear wheels would crab steer at a slight angle with the front wheels.
There were a lot of Japanese 4WS cars around late '80's early '90's - Honda, Diamante and Skylines too. The Mitsubishi and Nissan systems came in over certain speeds with very little movement, and seldom gave problems. Honda used a shaft to the rear rack, we saw plenty of bent shafts and lockked steering. A Skyline with the HICAS light on was pretty common, but it never upset the car...I guess they defaulted to straight ahead.
The problems/situations that 4ws fix/improve (such as high speed stability, manoeuvrability, cornering (turn in, balance), wear (in HGVs)) can also be fixed/improved in other ways. 4WS can be essential to overcome unavoidable limitations or to address flaws in design that can't be practically reworked.
After seeing what those parts cost to replace, they can keep that system.
Originally Posted By: Brons2
Originally Posted By: mightymousetech
Originally Posted By: OneEyeJack
If you keep cars RWS might be something to think about avoiding. In many cases, it might be a solution to a problem that does not exist.
They introduced 4WS on the new Acura TLX. What a nightmare. So many problems with the electric motors, at $2000 each. And I bet 99% of customers could not tell the difference.
SH-AWD has been around for years.
That is AWD, has nothing to do with AWS.
Originally Posted By: mightymousetech
Originally Posted By: OneEyeJack
If you keep cars RWS might be something to think about avoiding. In many cases, it might be a solution to a problem that does not exist.
They introduced 4WS on the new Acura TLX. What a nightmare. So many problems with the electric motors, at $2000 each. And I bet 99% of customers could not tell the difference.
SH-AWD has been around for years.
That is AWD, has nothing to do with AWS.
The new, and very expensive, Audi A8 has all wheel steering.
http://www.greencarcongress.com/2017/07/20170717-a8.html
Quote:
The optional dynamic all-wheel steering combines two distinct high-tech steering systems. The dynamic steering on the front axle incorporates what is known as strain wave gearing in which the ratio changes as a function of speed. The rear wheels are turned by a spindle drive and two track rods—at low speeds by up to five degrees against the direction of steering, to facilitate maneuvering and reduce the turning circle by about one meter to 11.4 meters (37.4 ft) on the A8 or 11.8 meters (38.7 ft) on the A8 L.
At medium and high speeds, the wheels are turned by up to two degrees in the direction of steering, for increased stability. Dynamic all-wheel steering matches the steering ratio optimally to the driving situation, adjusting the ratio across a range of 9.5 to 17. At the limits of driving dynamics or on surfaces that are slippery under one side of the car, dynamic all-wheel steering again stabilizes the new A8 by manipulating the steering at the front and rear axles.
http://www.greencarcongress.com/2017/07/20170717-a8.html
Quote:
The optional dynamic all-wheel steering combines two distinct high-tech steering systems. The dynamic steering on the front axle incorporates what is known as strain wave gearing in which the ratio changes as a function of speed. The rear wheels are turned by a spindle drive and two track rods—at low speeds by up to five degrees against the direction of steering, to facilitate maneuvering and reduce the turning circle by about one meter to 11.4 meters (37.4 ft) on the A8 or 11.8 meters (38.7 ft) on the A8 L.
At medium and high speeds, the wheels are turned by up to two degrees in the direction of steering, for increased stability. Dynamic all-wheel steering matches the steering ratio optimally to the driving situation, adjusting the ratio across a range of 9.5 to 17. At the limits of driving dynamics or on surfaces that are slippery under one side of the car, dynamic all-wheel steering again stabilizes the new A8 by manipulating the steering at the front and rear axles.
Originally Posted By: 555
When GM did this before(12-15 years ago?) I think the company was American Axle that produced the system. Bought their stock as soon as I heard about the rear steer system. Their shares had a nice bump up in price.
It was Delphi that was owned by GM at the time using a Dana 60 as the differential, This arrangement in a 1/2 ton is actually stronger & more durable than the 8.6" AAM axles that come in regular 1500 models.
Heavy duty Spicer Wheel Bearings & CV Joints, Huge Bolt-In Ball Joints. The SAME unit was used in 2500 trucks save for the Hubs, Rotors, & Calipers because the 8 lugs.
The track record for the GM Quadrasteer is very impressive....To bad is was a very expensive option.
When GM did this before(12-15 years ago?) I think the company was American Axle that produced the system. Bought their stock as soon as I heard about the rear steer system. Their shares had a nice bump up in price.
It was Delphi that was owned by GM at the time using a Dana 60 as the differential, This arrangement in a 1/2 ton is actually stronger & more durable than the 8.6" AAM axles that come in regular 1500 models.
Heavy duty Spicer Wheel Bearings & CV Joints, Huge Bolt-In Ball Joints. The SAME unit was used in 2500 trucks save for the Hubs, Rotors, & Calipers because the 8 lugs.
The track record for the GM Quadrasteer is very impressive....To bad is was a very expensive option.
7
Originally Posted By: clinebarger
Originally Posted By: 555
When GM did this before(12-15 years ago?) I think the company was American Axle that produced the system. Bought their stock as soon as I heard about the rear steer system. Their shares had a nice bump up in price.
It was Delphi that was owned by GM at the time using a Dana 60 as the differential, This arrangement in a 1/2 ton is actually stronger & more durable than the 8.6" AAM axles that come in regular 1500 models.
Heavy duty Spicer Wheel Bearings & CV Joints, Huge Bolt-In Ball Joints. The SAME unit was used in 2500 trucks save for the Hubs, Rotors, & Calipers because the 8 lugs.
The track record for the GM Quadrasteer is very impressive....To bad is was a very expensive option.
Thanks for the clarification.
Originally Posted By: clinebarger
Originally Posted By: 555
When GM did this before(12-15 years ago?) I think the company was American Axle that produced the system. Bought their stock as soon as I heard about the rear steer system. Their shares had a nice bump up in price.
It was Delphi that was owned by GM at the time using a Dana 60 as the differential, This arrangement in a 1/2 ton is actually stronger & more durable than the 8.6" AAM axles that come in regular 1500 models.
Heavy duty Spicer Wheel Bearings & CV Joints, Huge Bolt-In Ball Joints. The SAME unit was used in 2500 trucks save for the Hubs, Rotors, & Calipers because the 8 lugs.
The track record for the GM Quadrasteer is very impressive....To bad is was a very expensive option.
Thanks for the clarification.
Yeah, fact is - I have one. Great mower by the way.
http://www.husqvarna.com/us/products/riders/r-322t-awd/967032101/
http://www.husqvarna.com/us/products/riders/r-322t-awd/967032101/
Originally Posted By: SubLGT
The new, and very expensive, Audi A8 has all wheel steering.
http://www.greencarcongress.com/2017/07/20170717-a8.html
Quote:
The optional dynamic all-wheel steering combines two distinct high-tech steering systems. The dynamic steering on the front axle incorporates what is known as strain wave gearing in which the ratio changes as a function of speed. The rear wheels are turned by a spindle drive and two track rods—at low speeds by up to five degrees against the direction of steering, to facilitate maneuvering and reduce the turning circle by about one meter to 11.4 meters (37.4 ft) on the A8 or 11.8 meters (38.7 ft) on the A8 L.
The similarly sized 1995-2000 Lexus LS400 had a turn circle of 34.8 feet. Tight, tight, tight, tight. And no four wheel steering either.
The new, and very expensive, Audi A8 has all wheel steering.
http://www.greencarcongress.com/2017/07/20170717-a8.html
Quote:
The optional dynamic all-wheel steering combines two distinct high-tech steering systems. The dynamic steering on the front axle incorporates what is known as strain wave gearing in which the ratio changes as a function of speed. The rear wheels are turned by a spindle drive and two track rods—at low speeds by up to five degrees against the direction of steering, to facilitate maneuvering and reduce the turning circle by about one meter to 11.4 meters (37.4 ft) on the A8 or 11.8 meters (38.7 ft) on the A8 L.
The similarly sized 1995-2000 Lexus LS400 had a turn circle of 34.8 feet. Tight, tight, tight, tight. And no four wheel steering either.
Four Wheel Steering instantly gives me a headache. I imported an Autozam Clef from New Zealand close to twenty years ago. Think of a larger Escort ZX2. Impossible to get the 4WS worked on. Sold it at a loss.
While we're talking about bringing back other failed GM "quad" projects from the past, why not bring back the Quadrabog, er... Quadrajet carburetor.) OR the greatest engine ever created: the Quad4. (I kid, I kid.) GM has a horrible history with anything beginning with "quad".
While we're talking about bringing back other failed GM "quad" projects from the past, why not bring back the Quadrabog, er... Quadrajet carburetor.) OR the greatest engine ever created: the Quad4. (I kid, I kid.) GM has a horrible history with anything beginning with "quad".
GM Quadrasteer was not a engineering failure!
Autozam ? Ony in Japan or New Zealand, and it was a used import here.
I was working on an R32 Skyline last week, it was not HICAS, but still uses all the components...just a bar between hubs. this one had play in the outer ball joint...sort of a tie rod end, but it's mounted in the hub. Skylines may not be common elsewhere, but they used to be everywhere here, and I've never seen one of these worn out before. So, 1990 and had a hard life, not too bad.
I was working on an R32 Skyline last week, it was not HICAS, but still uses all the components...just a bar between hubs. this one had play in the outer ball joint...sort of a tie rod end, but it's mounted in the hub. Skylines may not be common elsewhere, but they used to be everywhere here, and I've never seen one of these worn out before. So, 1990 and had a hard life, not too bad.
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