Are we ever going to see this? I'm surprised we still have spring ride suspension. Independent front suspension rides so much better and turns so much tighter. Why isn't this offered?
http://www.zf.com/corporate/en/prod...es/trucks_independent_suspension_is80tf.shtml
Not independent, but they make drive axles too:
http://www.zf.com/corporate/en/prod...trucks_chassis_suspension_rear_twinaxle.shtml
Independent Front Suspension on trucks in the future?
Discussion in 'Trucks [ Eighteen Wheelers ]' started by allisonisatranny, Oct 12, 2014.
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Because it's heavier, more complex, and harder to set up at the factory. Also independent systems tend to bumpsteer since it is basically impossible to get the steering geometry to match the suspension geometry without some sort of space frame setup.
Edit for edit:
I don't think that ZF system can do a million miles under a truck on US roads. The Oshkosh and Euclid systems are more what i was thinking, they are very heavy and very robust. -
http://www.volvotrucks.com/trucks/u...atures/Pages/individual-front-suspension.aspx
Volvo already has a setup available in Europe. Can't say I've seen any non-propaganda reports about it yet -
I know they have it in Europe, but they don't have it over here.
I've driven buses with independent front suspension, and it is just the opposite of what you say. There is no bump steer. You don't get sucked into the shoulder where there are deep crowns, the ride is amazing, the steering cut is sharper, etc. The only maintenance needed is typically the bushings.
Bottom line, I don't think you read the web page links or have driven a large truck or bus with independent front suspension to make a comparison. -
Myself, im a truck owner: The Freightliner Columbia, came with steel leaf spring suspension, those steer tires lasted on average 110K miles before replacement. Improvement done, i replaced from steel to Composite leaf springs, tire mileage jumped to 160K, but im getting excessive wear on the drivers side, sidewall top corner, top 1/4" of steer tire wear early: the affect the wear channel closest to the outside tire is 4/32" while the inside channel is 11/32". To correct the problem requires a Camber adjustment...the front axle will require bending. The camber adjustment should increase my steer tire life. But, i've decided to pass on the Camber adjustment. As a truck owner, im in a minority that can experiment and try new things, but i have limits. Again, as i read about this suspension, i ask myself, how will this improvement affect my truck, what other adjustments will be required. (musing...reading about the new suspension, no where do i read about increased tire life.
Tires are a big cost.)
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From what I've heard from other drivers with air ride front axles, they got much better tire life over spring ride. The independent suspension front axles, the wheels stay on the road more since the suspension does a much better job of absorbing everything. The only thing I could see effecting tire wear would be the tighter wheel cut.
It's the same argument about disc brakes. Most fleets don't want to change, because all their equipment, trucks and trailers, are spec'd to use the same axles and same brakes. -
"...allisonisatranny: From what I've heard from other drivers..." i've heard the same thing, only im of the mindset whom likes to hear from the people whom is making the product...i like my language plain & simple.
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volvo say front independent suspension is only for highway ,
first fh here with independent suspension got big problems with it , owner was complaining a lot , truck is floating lika a boat when it drives toward you it cannot hold straight line on some bad road , it put lot of bumps so much that dashboard cracks , volvo though it is problem in cab suspension, so they change it and again since owner was requested spring suspenison as it was too soft ,he wanted to swap it for brand new old model but they did not want , i dont know if they solve problem until now i have not talk to him almost for a year -
Independent front suspensions aren't new in heavy trucks. Back when GM was still in the heavy truck business, they had some models w/ IFS. My dad had one (1961 I think-- might have been as late as 1963) but as I recall they only built them for a few years. I guess they didn't work out all that well.
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for sure it is not new, tatra build this for a long time, i dont know exactly how long , they use same system of independent suspension since 1928 but it was i think first on cars
also something interesting, 1963 tipper trailer with independent suspension
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