Electric power steering

[madfast]

Ok so from this pic

we can see that the FT will have EPS. my immediate reaction is , of course, but then...


it turns out the LF-A has column mounted electric power steering! conventionally, column mounted has the worst feel over pinion mounted and rack mounted, but the LF-A has great steering feel!!! THIS is why you have a halo car. THIS is why the LF-A costs so much. they've managed to make electric power steering great. so all those hours spent tuning the steering? it trickles down into $20k cars like the FT, hopefully

so what does all this mean? it means toyota knows how to make EPS great. sure a corolla or yaris isnt going to have similar steering feel/EPS tuning, but the FT was made with the same sporting intentions as the LF-A. it's supposed to be a bac to basics kinda car with as little intervention as possible. what better steering system to emulate? it would not surprise me if the steering of this car turns out to be LF-A good. and for an EPS system? that is HIGH praise...

[Kiwi]

The column mounted EPS was also one of my main concerns about this car.

I've never realized that the LFA also uses the same type of EPS system, but if Toyota can do it then lets hope they also do the same with the FT86.

[chulooz]

Are you sure the power steering is done by toyota? Subaru also makes an EAPS system.

[70NYD]

My RX8 has electric power steering, it feels great.. This is different to drive by wire

[Random_Art]

As long as we're talking about the steering system, this is a patent that was published last week assigned to Fuji Heavy Industries (Subaru.) As with many patents, it tends to be rather vague as to what vehicle it goes to. That in mind, it describes a system for mechanical steering.

Quote from the first page:
"Moreover, since the steering gear ratio can be changed mechanically without performing motor control, the occurrence of control delay can be prevented, thereby reliably preventing deterioration of the driver's operational feel"

So whatever car this system is going on, it seems like they really want road feedback and driver experience to be key. Which, seems to be what they've been saying all along for the FR-S/BRZ/Whatever.

[Random_Art]

And here's another patent from Fuji Heavy Industries describing an electric power steering unit published back in July.

[madfast]

Originally Posted by Random_Art

As long as we're talking about the steering system, this is a patent that was published last week assigned to Fuji Heavy Industries (Subaru.) As with many patents, it tends to be rather vague as to what vehicle it goes to. That in mind, it describes a system for mechanical steering.

Quote from the first page:
"Moreover, since the steering gear ratio can be changed mechanically without performing motor control, the occurrence of control delay can be prevented, thereby reliably preventing deterioration of the driver's operational feel"

So whatever car this system is going on, it seems like they really want road feedback and driver experience to be key. Which, seems to be what they've been saying all along for the FR-S/BRZ/Whatever.

i dunno how i feel about variable steering ratios. BMW's active steering hasnt been such a hit. i have a feeling this patent isnt for this car. steering is absolutely important in this back to basics car. variable ratio is not necessary. i personally want it quick all the time

[Spaceywilly]

Originally Posted by 70NYD

My RX8 has electric power steering, it feels great.. This is different to drive by wire

RX8 uses rack mounted EPS. This is column mounted, which is known for having terrible feel.

[Dave-ROR]

Originally Posted by madfast

i dunno how i feel about variable steering ratios. BMW's active steering hasnt been such a hit. i have a feeling this patent isnt for this car. steering is absolutely important in this back to basics car. variable ratio is not necessary. i personally want it quick all the time

I dunno, I'd rather have a mechanical power steering system with variable ratio over a column mounted EPS system any day of the week. How would column mounted EPS be more "back to the basics" than mechanical, regardless of variable steering ratios or not.

As long as the variable steering is quick for all but the very extremes of wheel angles (yes I'd prefer non variable as well, but in this world of EPS systems I'd love ANY mech system instead!) then I think it'll be great to have the system that patent is for... and it does seem like a potentially good sign that the patent seems focused on driver involvement, exactly what Toyota and Subaru say this car was designed for.

[Random_Art]

Originally Posted by Dave-ROR

I dunno, I'd rather have a mechanical power steering system with variable ratio over a column mounted EPS system any day of the week. How would column mounted EPS be more "back to the basics" than mechanical, regardless of variable steering ratios or not.

As long as the variable steering is quick for all but the very extremes of wheel angles (yes I'd prefer non variable as well, but in this world of EPS systems I'd love ANY mech system instead!) then I think it'll be great to have the system that patent is for... and it does seem like a potentially good sign that the patent seems focused on driver involvement, exactly what Toyota and Subaru say this car was designed for.

I, too, would rather have the mechanical steering. I've driven a few new cars that had electric power steering, and every single one felt dead to the road. Personally, I miss how much feedback I got from my Celica.

But, on the other hand, I don't want the system to be so mechanically stupid as to be almost impossible to turn the wheel when the car is stationary. It was a workout to wrestle with the wheel in my old Toyota pickup.

[madfast]

Originally Posted by Dave-ROR

I dunno, I'd rather have a mechanical power steering system with variable ratio over a column mounted EPS system any day of the week. How would column mounted EPS be more "back to the basics" than mechanical, regardless of variable steering ratios or not.

As long as the variable steering is quick for all but the very extremes of wheel angles (yes I'd prefer non variable as well, but in this world of EPS systems I'd love ANY mech system instead!) then I think it'll be great to have the system that patent is for... and it does seem like a potentially good sign that the patent seems focused on driver involvement, exactly what Toyota and Subaru say this car was designed for.

Originally Posted by Random_Art

I, too, would rather have the mechanical steering. I've driven a few new cars that had electric power steering, and every single one felt dead to the road. Personally, I miss how much feedback I got from my Celica.

But, on the other hand, I don't want the system to be so mechanically stupid as to be almost impossible to turn the wheel when the car is stationary. It was a workout to wrestle with the wheel in my old Toyota pickup.

there's no point in talking about mechanical steering. it looks like 99.999% chance that it's EPS. fwiw the new 991 porsche 911 has EPS so its a sign of the times. Im just glad and optimistic that toyota has shown that they can make a column mounted EPS that doesnt outright suck.

[Dave-ROR]

Originally Posted by madfast

there's no point in talking about mechanical steering. it looks like 99.999% chance that it's EPS. fwiw the new 991 porsche 911 has EPS so its a sign of the times. Im just glad and optimistic that toyota has shown that they can make a column mounted EPS that doesnt outright suck.

Well if Subaru just filed a patent now than the rest of us can keep the hope alive that it won't be a POS EPS system

[Kiwi]

Originally Posted by madfast

there's no point in talking about mechanical steering. it looks like 99.999% chance that it's EPS. fwiw the new 991 porsche 911 has EPS so its a sign of the times. Im just glad and optimistic that toyota has shown that they can make a column mounted EPS that doesnt outright suck.

I'm pretty sure all or most cars are using mechanical steering as I don't think steer-by-wire is offered right now.

The difference is that the steering is power assisted with electric motors instead of using hydraulic pumps.
All in all this is encouraging news.

[madfast]

Originally Posted by Kiwi

I'm pretty sure all or most cars are using mechanical steering as I don't think steer-by-wire is offered right now.

The difference is that the steering is power assisted with electric motors instead of using hydraulic pumps.
All in all this is encouraging news.

in terms of this discussion, it's assumed "mechanical steering" means hydraulic power steering.