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Old 09-30-2005, 05:11 PM   #1
dr_wheel
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Default Nissan Pivo concept uses AMAZING new experimental "drive-by-wire" system!

http://www.cnn.com/2005/AUTOS/09/30/...eut/index.html

Quote:
The car, named Pivo after the word "pivot," operates on an experimental system called drive-by-wire, which eliminates the mechanical linkages between cabin and chassis to enable steering, braking and shifting through electronic signals.
I dunno... I thought this was funny. Doesn't the STi use the very same super top secret experimental "drive-by-wire" throttle control?
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Old 09-30-2005, 05:12 PM   #2
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Honda has been using this for years.
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Old 09-30-2005, 05:15 PM   #3
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Quote:
Originally Posted by dcmomentum
Honda has been using this for years.
as has nissan
Hell, it's CNN, not edmunds
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Old 09-30-2005, 05:35 PM   #4
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Does any production car use "drive by wire" for steering? I don't know of any.
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Old 09-30-2005, 05:41 PM   #5
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Quote:
Originally Posted by athakur999
Does any production car use "drive by wire" for steering? I don't know of any.
or braking?

MV
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Old 09-30-2005, 05:45 PM   #6
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Quote:
Originally Posted by mvstype
or braking?

MV
Mercedes-Benz SL500. It does have a backup mechanical system in case you loose electricity...
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Old 09-30-2005, 05:46 PM   #7
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Quote:
Originally Posted by athakur999
Does any production car use "drive by wire" for steering? I don't know of any.
hmmm wouldn't that be "steer by wire"
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Old 09-30-2005, 05:47 PM   #8
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Quote:
Originally Posted by mvstype
or braking?

MV
The reason that auto manufacturer's haven't gone to all "by-wire" systems yet probably has something to do with that scary little word. What was it again? Oh yea: LIABILITY. Remember, this is only a concept car. It's not like everyone doesn't have the capabilities to implement braking and steering-by-wire yet. Obviously, throttle-by-wire isn't a new idea.
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Old 09-30-2005, 05:48 PM   #9
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Its all drive-by-wire. Though i'm not sure how safe that is. What happens if you run out of power, or a fuse blows.

IBOMGICANTSTEER
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Old 09-30-2005, 06:21 PM   #10
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The GM Saturn Ion (and others) has electric power steering (not drive-by-wire, I know, but still a small step in that direction). A few Mercedes and BMWs have throttle-by-wire, and the Mercedes 'braking assist' coudl kind of be called braking-by-wire. And jets have had this technology for decades now, right?

It was just a matter of time before a full drive-by-wire for a car was introduced. And even then, this is just in the concept not the full production version, right?

No big deal, just one more new technology NOT introduced by the Domestic carmakers.
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Old 09-30-2005, 06:26 PM   #11
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As you already know drive by wire is used in motorsports. I know my Civic has electric power steering, it is wierd to get used to, but now I'm able to use it just as well as normal power steering.
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Old 09-30-2005, 06:33 PM   #12
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They used the wrong term, should be fly by wire or something similar. Eliminating all mechanical linkage between the cabin and the chassis is a very new, experimental technology.

Electromechanical power steering still has a direct linkage to the steering rack, it just replaces the hydraulic PS pump with a motor, eliminating another belt-driven accessory. If the motor fails, you can still steer the car.

This technology, by eliminating all mechanical links between cabin and chassis would further eliminate the clutch cable, brake cables and any other redundant safety system. Liability is right - I feel for the salesman that has to attempt to explain how the systems are safe to the 80 year-old couple that's trading in their ten-year-old Altima on this thing. We had enough trouble assuring customers that the automatic doors on modern minivans won't fly open on the freeway.
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Old 09-30-2005, 06:34 PM   #13
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I'll take my racknpinion thank you.
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Old 09-30-2005, 07:40 PM   #14
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stop confusing "drive by wire" for "throttle by wire"!!!

throttle by wire + brake by wire + steer by wire + ac by wire!! = drive by wire

DBW != TBW
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Old 09-30-2005, 07:46 PM   #15
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So um, why exactly are people afraid of this technology?

A conversation circa a long, long time ago:
OMG - theere is this new braking technology - it doesn't squeeze the wheels via mechanical force, but uses a bunch of hoses and then uses LIQUID to squeeze the brakes till the car stops. OMG that has got to be soooo dangerous.
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Old 09-30-2005, 08:52 PM   #16
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Quote:
Originally Posted by Hazdaz
So um, why exactly are people afraid of this technology?
Why do the British drink warm beer?

Refrigerator by Lucas.

A failing mechanical system usually gets progressively worse before failing completely.

A failing computer system generally "just quits working." People are right to be afraid of this technology.

You know all those jokes about "If Mircosoft designed cars?" Well, DBW is exactly that...
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Old 09-30-2005, 09:15 PM   #17
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Quote:
Originally Posted by pio!pio!
stop confusing "drive by wire" for "throttle by wire"!!!

throttle by wire + brake by wire + steer by wire + ac by wire!! = drive by wire

DBW != TBW
Okay.

BMW calls it drive by wire. VW calls it drive by wire. MINI calls it drive by wire.
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Old 09-30-2005, 10:06 PM   #18
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bmw 7series uses everything by wire......or so i am told by a tech at the dealership.....no physical connection for steering or brakes....
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Old 10-01-2005, 06:31 AM   #19
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Quote:
Originally Posted by Chromer
A failing mechanical system
Exactly... FAILING mechanical system - last time I checked, but it was more likely that my spinning (i.e. moving parts) harddrive in my PC was gonna fail, than the data cable that connects it to the motherboard - electrons tend to want to move no matter what.

I don't see that much of a difference here - all this *-by-wire stuff is moving the mechanical component away from having a direct link to the human input - big deal. There is still a mechanical component that physically rotates the wheels and there is still a physical pedal that you have to stomp on, just the input as to how much gas to give is sent electronically to the computer/engine instead of a mechanical cable telling the computer/engine how much gas to give.

I see this WAY less a "safety" issue, as I do a "feed-back" issue for driving enthusiasts. You can feel the road in your steeringwheel because of that mechanical connection, but you won't in a steering-by-wire system unless they use some force-feedback which I am assuming/hoping that they do.
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Old 10-01-2005, 09:22 AM   #20
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Quote:
Originally Posted by Hazdaz
I see this WAY less a "safety" issue, as I do a "feed-back" issue for driving enthusiasts. You can feel the road in your steeringwheel because of that mechanical connection, but you won't in a steering-by-wire system unless they use some force-feedback which I am assuming/hoping that they do.
Exactly. I don't want to end up some day driving a car and have it feel like a freakin video game. What's the point if you can't feel your tires grip and spin over bumps?
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Old 10-01-2005, 12:49 PM   #21
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Quote:
Originally Posted by DJ 9iron
Exactly. I don't want to end up some day driving a car and have it feel like a freakin video game. What's the point if you can't feel your tires grip and spin over bumps?
Welll I am SURE that there will be some driver's feedback either already, or eventually. I don't see a safty problem, just the feedback issue. Ofcourse in cars made for the average person that knows nothing about cars, having zero feedback might not really matter.
As bizzaar as this might sound, they really should atleast put as much feedback into the wheel as you can get playing a videogame - some of the PC steering wheels actually are very realistic.
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Old 10-01-2005, 03:31 PM   #22
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Quote:
Originally Posted by Hazdaz
The GM Saturn Ion (and others) has electric power steering (not drive-by-wire, I know, but still a small step in that direction). A few Mercedes and BMWs have throttle-by-wire, and the Mercedes 'braking assist' coudl kind of be called braking-by-wire. And jets have had this technology for decades now, right?

It was just a matter of time before a full drive-by-wire for a car was introduced. And even then, this is just in the concept not the full production version, right?

No big deal, just one more new technology NOT introduced by the Domestic carmakers.
Subaru had an electric power steeing setup in production 17-18 years ago. They also used a CVT tranny 15+ years ago.

Saab has had drive by wire throttle since late 1991.

Brakes by wire scares me
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Old 10-01-2005, 03:57 PM   #23
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if its good enough for an F-16 its good enough for your grocery getter. people are just being paranoid.
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Old 10-01-2005, 04:13 PM   #24
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IBsomedudegetsabunchofalligatorclipsandfiguresouth owtorunhisNissanwithaRCcarremote.
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Old 06-17-2006, 11:21 PM   #25
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