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  #1 (permalink)  
Old 05 Dec 2007, 06:44 pm
Andy
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Default Drive by wire (DBW)????

Can you tell me what "Drive by Wire" is please, on new honda accord
2.2i-CTDi, thanks.

Haven't heard of that, cheers.

AE


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  #2 (permalink)  
Old 05 Dec 2007, 07:06 pm
Richard Blaine
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Default Re: Drive by wire (DBW)????

"Andy" <blueflame1965@hotmail.com> wrote in message
news:09OdndWeBLxH2MranZ2dnUVZ8uqdnZ2d@pipex.net...
> Can you tell me what "Drive by Wire" is please, on new honda accord
> 2.2i-CTDi, thanks.
>
> Haven't heard of that, cheers.
>
> AE


Control of something by electrical impulse over a wire rather tugging on a
cable-- like in the old days there was one from your gas pedal to the
butterfly in the carburetor that opened it wider when you stomped down. When
you tromp on the gas pedal these days, it sends a signal to the fuel
injector and fuel pump to step up the flow.


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  #3 (permalink)  
Old 05 Dec 2007, 07:15 pm
Jim Yanik
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Default Re: Drive by wire (DBW)????

"Andy" <blueflame1965@hotmail.com> wrote in
news:09OdndWeBLxH2MranZ2dnUVZ8uqdnZ2d@pipex.net:

> Can you tell me what "Drive by Wire" is please, on new honda accord
> 2.2i-CTDi, thanks.
>
> Haven't heard of that, cheers.
>
> AE
>
>
>


the steering is actuated by an electric motor that is controlled by a servo
actuator loop at the wheel. They're trying to eliminate the power steering
pump and reduce load on the engine.

IMO,not a good idea;if something glitches or fails,it WILL kill you.
There's a reason FlyByWire F-16s got the nickname "Yard Dart".

On an F-16,F-15,F/A-18,you gain a lot of maneuverability,something
important for fighter jets,but totally unnecessary for an auto.

--
Jim Yanik
jyanik
at
kua.net
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  #4 (permalink)  
Old 05 Dec 2007, 07:52 pm
Jim Yanik
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Default Re: Drive by wire (DBW)????

"Richard Blaine" <rblaine@lecafe> wrote in
news:rvmdnYK2LPVs18ranZ2dnUVZ_sSlnZ2d@comcast.com:

> "Andy" <blueflame1965@hotmail.com> wrote in message
> news:09OdndWeBLxH2MranZ2dnUVZ8uqdnZ2d@pipex.net...
>> Can you tell me what "Drive by Wire" is please, on new honda accord
>> 2.2i-CTDi, thanks.
>>
>> Haven't heard of that, cheers.
>>
>> AE

>
> Control of something by electrical impulse over a wire rather tugging
> on a cable-- like in the old days there was one from your gas pedal to
> the butterfly in the carburetor that opened it wider when you stomped
> down. When you tromp on the gas pedal these days, it sends a signal to
> the fuel injector and fuel pump to step up the flow.
>
>
>


actually,the ECU makes the injectors stay OPEN (duration) longer,thus more
fuel flow.(by sensing throttle pedal position with a variable resistor)

--
Jim Yanik
jyanik
at
kua.net
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  #5 (permalink)  
Old 05 Dec 2007, 09:13 pm
Matt Ion
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Posts: n/a
Default Re: Drive by wire (DBW)????

Richard Blaine wrote:
> "Andy" <blueflame1965@hotmail.com> wrote in message
> news:09OdndWeBLxH2MranZ2dnUVZ8uqdnZ2d@pipex.net...
>> Can you tell me what "Drive by Wire" is please, on new honda accord
>> 2.2i-CTDi, thanks.
>>
>> Haven't heard of that, cheers.
>>
>> AE

>
> Control of something by electrical impulse over a wire rather tugging on a
> cable-- like in the old days there was one from your gas pedal to the
> butterfly in the carburetor that opened it wider when you stomped down. When
> you tromp on the gas pedal these days, it sends a signal to the fuel
> injector and fuel pump to step up the flow.


In most cars, there is still a cable that attaches to the butterfly in
the throttle body. Injector operation is controlled by the ECU based on
the airflow measured through the throttle body or manifold, and assorted
other sensors' input, rather than direct input from the pedal.
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  #6 (permalink)  
Old 05 Dec 2007, 09:44 pm
Justbob30
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Posts: n/a
Default Re: Drive by wire (DBW)????

Actually, as I understand it, there is an electric pump to reduce the load
on the engine, there is still a mechanical connection between the front
wheels & steering wheel.....I could be wrong.

"Jim Yanik" <jyanik@abuse.gov> wrote in message
news:Xns99FDCE265B989jyanikkuanet@64.209.0.84...
> "Andy" <blueflame1965@hotmail.com> wrote in
> news:09OdndWeBLxH2MranZ2dnUVZ8uqdnZ2d@pipex.net:
>
>> Can you tell me what "Drive by Wire" is please, on new honda accord
>> 2.2i-CTDi, thanks.
>>
>> Haven't heard of that, cheers.
>>
>> AE
>>
>>
>>

>
> the steering is actuated by an electric motor that is controlled by a
> servo
> actuator loop at the wheel. They're trying to eliminate the power steering
> pump and reduce load on the engine.
>
> IMO,not a good idea;if something glitches or fails,it WILL kill you.
> There's a reason FlyByWire F-16s got the nickname "Yard Dart".
>
> On an F-16,F-15,F/A-18,you gain a lot of maneuverability,something
> important for fighter jets,but totally unnecessary for an auto.
>
> --
> Jim Yanik
> jyanik
> at
> kua.net


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  #7 (permalink)  
Old 05 Dec 2007, 09:55 pm
jim beam
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Posts: n/a
Default Re: Drive by wire (DBW)????

Matt Ion wrote:
> Richard Blaine wrote:
>> "Andy" <blueflame1965@hotmail.com> wrote in message
>> news:09OdndWeBLxH2MranZ2dnUVZ8uqdnZ2d@pipex.net...
>>> Can you tell me what "Drive by Wire" is please, on new honda accord
>>> 2.2i-CTDi, thanks.
>>>
>>> Haven't heard of that, cheers.
>>>
>>> AE

>>
>> Control of something by electrical impulse over a wire rather tugging
>> on a cable-- like in the old days there was one from your gas pedal to
>> the butterfly in the carburetor that opened it wider when you stomped
>> down. When you tromp on the gas pedal these days, it sends a signal to
>> the fuel injector and fuel pump to step up the flow.

>
> In most cars, there is still a cable that attaches to the butterfly in
> the throttle body. Injector operation is controlled by the ECU based on
> the airflow measured through the throttle body or manifold, and assorted
> other sensors' input, rather than direct input from the pedal.


none of the above guys. drive by wire is simply having the throttle
operated by a computer controlled servo. it means there is no
mechanical connection to the pedal any more - just a sensor that acts as
input for the ecu, and the ecu uses that in conjunction with a bunch of
other info to calculate how wide to open the throttle. it's especially
advantageous for automatics as it means you can de-throttle when the
gear changes. injection really has nothing to do with it.
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  #8 (permalink)  
Old 05 Dec 2007, 09:56 pm
jim beam
Guest
 
Posts: n/a
Default Re: Drive by wire (DBW)????

Justbob30 wrote:
> Actually, as I understand it, there is an electric pump to reduce the
> load on the engine, there is still a mechanical connection between the
> front wheels & steering wheel.....I could be wrong.
>
> "Jim Yanik" <jyanik@abuse.gov> wrote in message
> news:Xns99FDCE265B989jyanikkuanet@64.209.0.84...
>> "Andy" <blueflame1965@hotmail.com> wrote in
>> news:09OdndWeBLxH2MranZ2dnUVZ8uqdnZ2d@pipex.net:
>>
>>> Can you tell me what "Drive by Wire" is please, on new honda accord
>>> 2.2i-CTDi, thanks.
>>>
>>> Haven't heard of that, cheers.
>>>
>>> AE
>>>
>>>
>>>

>>
>> the steering is actuated by an electric motor that is controlled by a
>> servo
>> actuator loop at the wheel. They're trying to eliminate the power
>> steering
>> pump and reduce load on the engine.
>>
>> IMO,not a good idea;if something glitches or fails,it WILL kill you.
>> There's a reason FlyByWire F-16s got the nickname "Yard Dart".
>>
>> On an F-16,F-15,F/A-18,you gain a lot of maneuverability,something
>> important for fighter jets,but totally unnecessary for an auto.
>>
>> --
>> Jim Yanik
>> jyanik
>> at
>> kua.net

>


yes, electrically controlled power steering. that's not drive by wire.
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  #9 (permalink)  
Old 05 Dec 2007, 10:11 pm
Jim Yanik
Guest
 
Posts: n/a
Default Re: Drive by wire (DBW)????

"Justbob30" <NoThank@you.com> wrote in
news:sY-dnRVP3Oqv7cranZ2dnUVZ_gqdnZ2d@comcast.com:

> Actually, as I understand it, there is an electric pump to reduce the
> load on the engine, there is still a mechanical connection between the
> front wheels & steering wheel.....I could be wrong.
>
> "Jim Yanik" <jyanik@abuse.gov> wrote in message
> news:Xns99FDCE265B989jyanikkuanet@64.209.0.84...
>> "Andy" <blueflame1965@hotmail.com> wrote in
>> news:09OdndWeBLxH2MranZ2dnUVZ8uqdnZ2d@pipex.net:
>>
>>> Can you tell me what "Drive by Wire" is please, on new honda accord
>>> 2.2i-CTDi, thanks.
>>>
>>> Haven't heard of that, cheers.
>>>
>>> AE
>>>
>>>
>>>

>>
>> the steering is actuated by an electric motor that is controlled by a
>> servo
>> actuator loop at the wheel. They're trying to eliminate the power
>> steering pump and reduce load on the engine.
>>
>> IMO,not a good idea;if something glitches or fails,it WILL kill you.
>> There's a reason FlyByWire F-16s got the nickname "Yard Dart".
>>
>> On an F-16,F-15,F/A-18,you gain a lot of maneuverability,something
>> important for fighter jets,but totally unnecessary for an auto.
>>
>> --
>> Jim Yanik
>> jyanik
>> at
>> kua.net

>
>


it would not be "drive by WIRE" then.
for "drive by WIRE",the steering commands come through the wiring,not
through any mechanical linkage.

And by top posting,you destroy any logical continuity of the thread.

--
Jim Yanik
jyanik
at
kua.net
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  #10 (permalink)  
Old 05 Dec 2007, 10:21 pm
Jim Yanik
Guest
 
Posts: n/a
Default Re: Drive by wire (DBW)????

jim beam <spamvortex@bad.example.net> wrote in
news:07SdnVrMkfRj78ranZ2dnUVZ_jmdnZ2d@speakeasy.ne t:

> Matt Ion wrote:
>> Richard Blaine wrote:
>>> "Andy" <blueflame1965@hotmail.com> wrote in message
>>> news:09OdndWeBLxH2MranZ2dnUVZ8uqdnZ2d@pipex.net...
>>>> Can you tell me what "Drive by Wire" is please, on new honda accord
>>>> 2.2i-CTDi, thanks.
>>>>
>>>> Haven't heard of that, cheers.
>>>>
>>>> AE
>>>
>>> Control of something by electrical impulse over a wire rather
>>> tugging on a cable-- like in the old days there was one from your
>>> gas pedal to the butterfly in the carburetor that opened it wider
>>> when you stomped down. When you tromp on the gas pedal these days,
>>> it sends a signal to the fuel injector and fuel pump to step up the
>>> flow.

>>
>> In most cars, there is still a cable that attaches to the butterfly
>> in the throttle body. Injector operation is controlled by the ECU
>> based on the airflow measured through the throttle body or manifold,
>> and assorted other sensors' input, rather than direct input from the
>> pedal.

>
> none of the above guys. drive by wire is simply having the throttle
> operated by a computer controlled servo. it means there is no
> mechanical connection to the pedal any more - just a sensor that acts
> as input for the ecu, and the ecu uses that in conjunction with a
> bunch of other info to calculate how wide to open the throttle. it's
> especially advantageous for automatics as it means you can de-throttle
> when the gear changes. injection really has nothing to do with it.
>


No,"DRIVE by wire" is electrically controlled STEERING.
You are describing "throttle by wire".

My 2003 Nissan Sentra SE-R SpecV has throttle by wire;the throttle plate is
controlled completely by the ECU. Because of some wierd problem,my RPMs
sometimes rev up to 1500-2000 RPM and hunt around there for a second,then
slowly drop back to idle,without my foot even on the gas pedal.It's caused
a CEL of "idle RPM too high".I either need a new PS pressure switch or new
programming of the ECU(according to a service bulletin),which can of course
only be done by Nissan dealers;....at some charge.

I might be able to get the reprograming done under a different safety
recall at no cost.


--
Jim Yanik
jyanik
at
kua.net
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