Definition of steering ratio?
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From: Lisbon
Originally posted by cmnsnse
That's the variable Assist steering which the original S2000 has, the variable ratio that Luis mentioned is like an F1 car, but I dont think it's Ratio is varied at all as per speed.
It's ratio is not constant but it's curve is.
Turn the wheel a little as to change lanes and its the same as you have now, BUT only a quarter turn is needed to make a sharp turn at say, a stop sign. I hear is it very difficult to get used to, straight from the mouths of our club members that drove it.
That's the variable Assist steering which the original S2000 has, the variable ratio that Luis mentioned is like an F1 car, but I dont think it's Ratio is varied at all as per speed.
It's ratio is not constant but it's curve is.
Turn the wheel a little as to change lanes and its the same as you have now, BUT only a quarter turn is needed to make a sharp turn at say, a stop sign. I hear is it very difficult to get used to, straight from the mouths of our club members that drove it.
). An example:
In our car turn the steering wheel x degrees from dead centre and you get y degrees of wheel deflection. Turn an additional x degrees and you get more than y degrees of additional wheel deflection.
In the type V turn the steering wheel x degrees from dead centre at 20km/h and you get z degrees of wheel deflection. Turn the steering wheel x degrees from dead centre at 100km/h and you get less than z degrees of wheel deflection.
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From: Ocean City
Interesting, I understood it as our cars were straight up one ratio with less assist at high speeds, it does get more stiff.
I dont understand how a steering ratio could be changed per speed unless you were to use servo's.
The type V has a flat bottom steering wheel because you don't ever have to turn it all the way around.
I dont understand how a steering ratio could be changed per speed unless you were to use servo's.
The type V has a flat bottom steering wheel because you don't ever have to turn it all the way around.
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From: Lisbon
Originally posted by cdelena
That does sound like a description of the system in the Type-V.. does the concept also apply to the standard model?
That does sound like a description of the system in the Type-V.. does the concept also apply to the standard model?
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From: Ocean City
Yeah, I searched and found ton's of VGS descriptions, all sound like that description.
No wonder it's such a pain to use . . . Humans cant perceive exact speed like the computers so some people may never get used to it.
I would think any variable ratio should be one curve at all times - only changing the assist, I suppose like ours.
That VGS system must be hell if it fails, regular EPS is heavy enough w/o power.
And yeah like I thought the ratio/speed would then be controlled by a computer and servo motor - or VGS motor otherwise, instead of a single gear system.
No wonder it's such a pain to use . . . Humans cant perceive exact speed like the computers so some people may never get used to it.
I would think any variable ratio should be one curve at all times - only changing the assist, I suppose like ours.
That VGS system must be hell if it fails, regular EPS is heavy enough w/o power.
And yeah like I thought the ratio/speed would then be controlled by a computer and servo motor - or VGS motor otherwise, instead of a single gear system.
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From: Lisbon
Lock variable steering ratio is really not that innovative. Honda used it before on the NSX and maybe some other car.
Speed variable steering ratio (aka VGS on the s2000 type V) is a first. I drove a type V in Japan, but it was too short an experience to derive any real impressions. The Type V also has a unique suspension and differential setup which further muddles any quick evaluation.
From reading the available information and inspecting the diagrams above, I thought I understood how VGS works. But I can't really answer the question: what happens when you accelerate thru a turn?
You could envisage a situation where you start turning at a very slow speed, say 5 km/h on a very low steering ratio, and then pick up speed, say to 60km/h, without changing lock.
How would it react? Would it widen the turn (giving new meaning to "throttle steering..."?) or keep the steering ratio?
I can't see how the latter could be the answer, as the logical consequence would be that steering ratio could only vary when you're driving dead straight. But if the answer is the first, then you can see how hard it will be to get used to the system.
Speed variable steering ratio (aka VGS on the s2000 type V) is a first. I drove a type V in Japan, but it was too short an experience to derive any real impressions. The Type V also has a unique suspension and differential setup which further muddles any quick evaluation.
From reading the available information and inspecting the diagrams above, I thought I understood how VGS works. But I can't really answer the question: what happens when you accelerate thru a turn?
You could envisage a situation where you start turning at a very slow speed, say 5 km/h on a very low steering ratio, and then pick up speed, say to 60km/h, without changing lock.
How would it react? Would it widen the turn (giving new meaning to "throttle steering..."?) or keep the steering ratio?
I can't see how the latter could be the answer, as the logical consequence would be that steering ratio could only vary when you're driving dead straight. But if the answer is the first, then you can see how hard it will be to get used to the system.
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