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2006-05-18, 09:33 PM
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#1 |
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SECCS Brewmeister
Join Date: Oct 2005
Location: on the edge of a marsh
Posts: 1,451
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why drive by wire?
Why are so many cars using drive by wire throttle body/gas pedal setups? I searched a little and the only reason I could find was giving the computer control over the car to improve gas mileage. Aren't the computers fast enough to modify the fuel and timing setups based upon the throttle plate opening and closing? Granted, I'm not a mechanic or automotive engineer but it seems like a lot of extra production cost that would yield small gains. Anyone care to enlighten my dumbass?
Thanks |
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2006-05-18, 09:37 PM
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#2 |
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JDM Cowboy
Real Name: Nick Join Date: Oct 2003
Location: Somewhere
Posts: 8,642
Car: 2015 Mazda 3
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No issues with throttle cables getting gunked up with hot apple pie and causing sporadic acceleration?
Personally, I'm okay with it. I'll start to complain when brake-by-wire comes out.
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While a standard engine is powered by a belt connected to the crankshaft, a turbo engine runs on its own exhaust steam, making it more energy efficient. -- CNN |
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2006-05-18, 09:41 PM
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#3 |
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The Doink
Real Name: Scott Join Date: Nov 2002
Location: Portland, OR
Posts: 20,335
Car: '09 OBXT, '02 WRX, '96 Miata
Class: PDX/TT-6
The way out is through
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How about the lower cost of cruise control.
Instead of: CC ECU, an extra throttle linkage, actuator motor, and all the associated wiring to run a switch from the wheel to the rest of the system. You have: A few buttons wired to the ECU.
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Is you is, or is you ain't, my con-stit-u-ints? |
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2006-05-18, 09:48 PM
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#4 |
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EJ22T
Join Date: Sep 2003
Location: Reno
Posts: 9,445
Car: '93/'01 GF6, mostly red
Class: 19 FP
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Cruise control, emissions, and to a lesser extent traction control.
http://www.sportcompactcarweb.com/ed...301scc_techno/
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FWD is the new AWD |
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2006-05-19, 05:43 AM
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#5 |
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SECCS Brewmeister
Join Date: Oct 2005
Location: on the edge of a marsh
Posts: 1,451
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Got it....Hot apple pie gunk....
 thanks guys |
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2006-05-19, 06:39 AM
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#6 |
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Token
Real Name: Le Stig Afrique? Join Date: Jun 2005
Location: sitting next to a big yellow box
Posts: 3,589
Car: 2001 Impreza 2.5 RS
Class: 05 TDSP
No, I won't work on your car. F* your car
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If I may chime in, I HATE drive by wire! From the tech's standpoint, it's just more of a SOB to work with than a mechanical cable.
More stuff to "go wrong" with the fly by wire system.
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"...these condoms have a topical anesthetic to reduce sensitivity, so you can last longer. What a paradox. You can't feel a thing, but you can f*ck for HOURS..." |
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2006-05-19, 08:38 AM
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#7 | |
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The Doink
Real Name: Scott Join Date: Nov 2002
Location: Portland, OR
Posts: 20,335
Car: '09 OBXT, '02 WRX, '96 Miata
Class: PDX/TT-6
The way out is through
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Quote:
Oh wait.
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Is you is, or is you ain't, my con-stit-u-ints? |
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2006-05-19, 09:23 AM
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#8 | |
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EJ22
Join Date: Mar 2005
Location: Elk Grove, CA
Posts: 450
Car: 2005 WRX STi
"I'm sideways and in control... I look good."
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Quote:
Throttle-by-wire also gives you the ability to have different throttle maps and/or pedal accelleration functions (like mouse accelleration) On my previous MB very quick throttle input would give you more aggressive throttle plate opening. (ex. quickly going from 5% to 60% may open the throttle plate to 100%) It would also adapt to your driving style, at least it would try. On the BMW cars with SMG transmissions the throttle-by-wire is needed during shifts. The best part of this is the throttle blipping to rev match when downshifting. These cars also have a two position throttle curve button. |
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2006-05-19, 09:24 AM
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#9 |
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Token
Real Name: Le Stig Afrique? Join Date: Jun 2005
Location: sitting next to a big yellow box
Posts: 3,589
Car: 2001 Impreza 2.5 RS
Class: 05 TDSP
No, I won't work on your car. F* your car
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I had a guy who decided to IDLE his Murano down here from Truckee because the potentiometer in the gas pedal assembly took a shit. Maybe Nissan just didn't get it right at first, but there's been SO many issues with that crap!
And I hate it when you're trying to listen for an internal engine noise, but you can't rev the motor up while you're under the hood! NO THROTTLE! I think that alone pisses me off the most... Cables work just fine.
__________________
"...these condoms have a topical anesthetic to reduce sensitivity, so you can last longer. What a paradox. You can't feel a thing, but you can f*ck for HOURS..." |
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2006-05-20, 02:57 PM
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#10 | |
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EJ22
Join Date: Mar 2006
Location: south lake tahoe
Posts: 234
Car: L
just push the brake pedal.
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