Manual Diff lock switch ?????
Feb 13, 2005 | 02:39 PM
#14
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Manual Diff lock switch ?????
Originally posted by: tyler711
Alright, I'm back. We tied 2-2, but it was a good team, so we're happy.
When I say hubs, I am referring to the hubs on the wheels on 04 and earlier, and the front gearcase (actually just a hub in the center) on 04.5 and later.
If you notice on your quad, the front axles are always turning when the back axles are turning. They are always connected, but keep in mind that the front axles are turning 20% slower than the rears.
When in 2WD, the front hubs never engage. The back wheels can go as fast as they want; the fronts will never engage (if working properly).
When you put it in AWD, you are not engaging the hubs, you are arming them so they can engage. The front hubs engage if the axle inside them begins turning faster than the wheel outside it. It is like a one-way bearing, if you are familar with those. Remember, the front axles are turning 20% slower than the rear, so under normal, full-traction driving conditions, the hubs are not engaged. The front wheels are turning faster than the axles, so the hubs are not engaged. This 20% difference allows for slight variations in axle:wheel speed while turning or anything else that changes wheel speed.
Once the back wheels lose traction, they begin to spin and speed up. As they do, the front axles also speed up. When the wheels spin 1/5 of a turn (that 20% difference), the front axle "catches up" to the front hub and it engages. Once traction is regained, the front wheel resumes its normal speed of 20% faster than the front axle, and the hub releases its grip on the axle and disengages.
This system is very well-designed, allowing amazing 4-wheel traction when needed, but unobstructed 2-wheel drive maneuverability when extra traction is not needed.
Because the system engages mechanically, when the wheels lose traction, it would be very difficult to modify the engagement. It is impossible to use an electronic switch to convert the system to part-time 4wd (all four wheels engaged when you want it.)
I hope this helps, it is hard to explain. I need a good thing to compare it to, but havent thought of anything.
Tyler
Alright, I'm back. We tied 2-2, but it was a good team, so we're happy.
When I say hubs, I am referring to the hubs on the wheels on 04 and earlier, and the front gearcase (actually just a hub in the center) on 04.5 and later.
If you notice on your quad, the front axles are always turning when the back axles are turning. They are always connected, but keep in mind that the front axles are turning 20% slower than the rears.
When in 2WD, the front hubs never engage. The back wheels can go as fast as they want; the fronts will never engage (if working properly).
When you put it in AWD, you are not engaging the hubs, you are arming them so they can engage. The front hubs engage if the axle inside them begins turning faster than the wheel outside it. It is like a one-way bearing, if you are familar with those. Remember, the front axles are turning 20% slower than the rear, so under normal, full-traction driving conditions, the hubs are not engaged. The front wheels are turning faster than the axles, so the hubs are not engaged. This 20% difference allows for slight variations in axle:wheel speed while turning or anything else that changes wheel speed.
Once the back wheels lose traction, they begin to spin and speed up. As they do, the front axles also speed up. When the wheels spin 1/5 of a turn (that 20% difference), the front axle "catches up" to the front hub and it engages. Once traction is regained, the front wheel resumes its normal speed of 20% faster than the front axle, and the hub releases its grip on the axle and disengages.
This system is very well-designed, allowing amazing 4-wheel traction when needed, but unobstructed 2-wheel drive maneuverability when extra traction is not needed.
Because the system engages mechanically, when the wheels lose traction, it would be very difficult to modify the engagement. It is impossible to use an electronic switch to convert the system to part-time 4wd (all four wheels engaged when you want it.)
I hope this helps, it is hard to explain. I need a good thing to compare it to, but havent thought of anything.
Tyler
You did a good job of explaining things...But the part about the front axles spin at 20% less than the back is a bit off. The ratio is alot closer than that. The 20% lag ( actually about 17%) comes from the amount of rotation, it takes the dowel pins in the hubs, to climb up the hex of the hillyer clutch, roughly 1/5 of a rotation of the back tire.
Feb 13, 2005 | 07:15 PM
#15
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Joined: Feb 2004
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Manual Diff lock switch ?????
Originally posted by: hondabuster
You did a good job of explaining things...But the part about the front axles spin at 20% less than the back is a bit off. The ratio is alot closer than that. The 20% lag ( actually about 17%) comes from the amount of rotation, it takes the dowel pins in the hubs, to climb up the hex of the hillyer clutch, roughly 1/5 of a rotation of the back tire.
Originally posted by: tyler711
Alright, I'm back. We tied 2-2, but it was a good team, so we're happy.
When I say hubs, I am referring to the hubs on the wheels on 04 and earlier, and the front gearcase (actually just a hub in the center) on 04.5 and later.
If you notice on your quad, the front axles are always turning when the back axles are turning. They are always connected, but keep in mind that the front axles are turning 20% slower than the rears.
When in 2WD, the front hubs never engage. The back wheels can go as fast as they want; the fronts will never engage (if working properly).
When you put it in AWD, you are not engaging the hubs, you are arming them so they can engage. The front hubs engage if the axle inside them begins turning faster than the wheel outside it. It is like a one-way bearing, if you are familar with those. Remember, the front axles are turning 20% slower than the rear, so under normal, full-traction driving conditions, the hubs are not engaged. The front wheels are turning faster than the axles, so the hubs are not engaged. This 20% difference allows for slight variations in axle:wheel speed while turning or anything else that changes wheel speed.
Once the back wheels lose traction, they begin to spin and speed up. As they do, the front axles also speed up. When the wheels spin 1/5 of a turn (that 20% difference), the front axle "catches up" to the front hub and it engages. Once traction is regained, the front wheel resumes its normal speed of 20% faster than the front axle, and the hub releases its grip on the axle and disengages.
This system is very well-designed, allowing amazing 4-wheel traction when needed, but unobstructed 2-wheel drive maneuverability when extra traction is not needed.
Because the system engages mechanically, when the wheels lose traction, it would be very difficult to modify the engagement. It is impossible to use an electronic switch to convert the system to part-time 4wd (all four wheels engaged when you want it.)
I hope this helps, it is hard to explain. I need a good thing to compare it to, but havent thought of anything.
Tyler
Alright, I'm back. We tied 2-2, but it was a good team, so we're happy.
When I say hubs, I am referring to the hubs on the wheels on 04 and earlier, and the front gearcase (actually just a hub in the center) on 04.5 and later.
If you notice on your quad, the front axles are always turning when the back axles are turning. They are always connected, but keep in mind that the front axles are turning 20% slower than the rears.
When in 2WD, the front hubs never engage. The back wheels can go as fast as they want; the fronts will never engage (if working properly).
When you put it in AWD, you are not engaging the hubs, you are arming them so they can engage. The front hubs engage if the axle inside them begins turning faster than the wheel outside it. It is like a one-way bearing, if you are familar with those. Remember, the front axles are turning 20% slower than the rear, so under normal, full-traction driving conditions, the hubs are not engaged. The front wheels are turning faster than the axles, so the hubs are not engaged. This 20% difference allows for slight variations in axle:wheel speed while turning or anything else that changes wheel speed.
Once the back wheels lose traction, they begin to spin and speed up. As they do, the front axles also speed up. When the wheels spin 1/5 of a turn (that 20% difference), the front axle "catches up" to the front hub and it engages. Once traction is regained, the front wheel resumes its normal speed of 20% faster than the front axle, and the hub releases its grip on the axle and disengages.
This system is very well-designed, allowing amazing 4-wheel traction when needed, but unobstructed 2-wheel drive maneuverability when extra traction is not needed.
Because the system engages mechanically, when the wheels lose traction, it would be very difficult to modify the engagement. It is impossible to use an electronic switch to convert the system to part-time 4wd (all four wheels engaged when you want it.)
I hope this helps, it is hard to explain. I need a good thing to compare it to, but havent thought of anything.
Tyler
You did a good job of explaining things...But the part about the front axles spin at 20% less than the back is a bit off. The ratio is alot closer than that. The 20% lag ( actually about 17%) comes from the amount of rotation, it takes the dowel pins in the hubs, to climb up the hex of the hillyer clutch, roughly 1/5 of a rotation of the back tire.
T711
Feb 14, 2005 | 01:02 AM
#16
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Manual Diff lock switch ?????
Also the front of the polaris isnt a differential, the two sides are locked together, and one side cant spin at a different rate than the other side. Unless you were in some slippery stuff, it would be a real arm workout.
BryceGTX
Feb 14, 2005 | 02:05 AM
#17
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Manual Diff lock switch ?????
Originally posted by: BryceGTX
Hello hondabuster. The two front tires can spin at a different rate. They are not locked together. This is one of the beauties of the Polaris system. It can unlock each tire individually from each other or from the rear. This is particularly helpful when the quad goes around a corner. Unlike the competitors systems that slid both front tires in a corner. And also, tyler711 is spot on.
BryceGTX
Also the front of the polaris isnt a differential, the two sides are locked together, and one side cant spin at a different rate than the other side. Unless you were in some slippery stuff, it would be a real arm workout.
BryceGTX
I wasnt aware one front tire could disengage separately from the other front tire. That wouldnt be true 4wd. Are you sure it can do that?
Feb 14, 2005 | 03:02 AM
#18
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Joined: Jan 2004
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Manual Diff lock switch ?????
You've got it right HondaBuster. When the front hub engages, you essentially have a locker, not a limited slip. That's what sets Polaris' system apart from the rest. When not engaged, the front wheels can spin at a different rate.
Feb 14, 2005 | 01:07 PM
#19
Range Rover
Joined: Feb 2004
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Manual Diff lock switch ?????
Tyler 711……your post was a very good synopsis of the Polaris awd system.
I really see no need to pick it apart as to if the Hilliard clutch lock up at 17% or 20%
If someone wants to do a search and read that other thread he can!......(.That was a really good one )
I really see no need to pick it apart as to if the Hilliard clutch lock up at 17% or 20%
If someone wants to do a search and read that other thread he can!......(.That was a really good one )
Feb 14, 2005 | 01:10 PM
#20
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Joined: Oct 2004
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Manual Diff lock switch ?????
Hello hondabuster. Yes, one of the front tires can disengage. It will disengage in situations where it should disengage. One case is when you are on a high traction surface such as concrete or rock and you are turning a corner. The Polaris system will disengage to allow the quad to corner properly. The competition's 4wd system causes the front tires to jump and slid in such an instance. This can be quite hard on the drive train. Some manufacturers put a soft rubber member in the front drive to help cushion this damaging action. Now, I don't know how someone can say this is not true 4 wheel drive. Seems to me that true 4 wheel drive provides power to any wheel or wheels when any of the others start to slip. If you have an argument with this, you must have an argument with the Jeep grand Cherokee 4wd system because it allows to Jeep to turn corners without jumping or jerking, but it can provide 100% traction to a single wheel just like the Polaris 4wd system.
BryceGTX
BryceGTX