Drive by wire (DBW)????

"Andy" <blueflame1965 DeleteThis @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
 >> Stay informed about: 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 RemoveThis @abuse.gov> wrote in message
news:Xns99FDCE265B989jyanikkuanet@64.209.0.84...
> "Andy" <blueflame1965 RemoveThis @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
 >> Stay informed about: 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.TakeThisOut@abuse.gov> wrote in message
> news:Xns99FDCE265B989jyanikkuanet@64.209.0.84...
>> "Andy" <blueflame1965.TakeThisOut@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.
 >> Stay informed about: Drive by wire (DBW)???? 

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

> "Andy" <blueflame1965 RemoveThis @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
 >> Stay informed about: Drive by wire (DBW)???? 

Jim Yanik wrote:
> "Richard Blaine" <rblaine@lecafe> wrote in
> news:rvmdnYK2LPVs18ranZ2dnUVZ_sSlnZ2d@comcast.com:
>
>> "Andy" <blueflame1965 RemoveThis @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)
>

not on its own it doesn't. throttle position is just one of many sensor
inputs that the ecu uses to calculate injection duration. these also
include:

oxygen sensor
coolant temperature
air temperature
air pressure - manifold
air pressure - atmosphere

throttle position is just part of the equation. if you want to check
out how the math is done, read this:
http://www.megamanual.com/v22manual/mfuel.htm
 >> Stay informed about: Drive by wire (DBW)???? 

Richard Blaine wrote:
> "Andy" <blueflame1965.DeleteThis@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.
 >> Stay informed about: Drive by wire (DBW)???? 

Matt Ion wrote:
> Richard Blaine wrote:
>> "Andy" <blueflame1965.DeleteThis@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.
 >> Stay informed about: Drive by wire (DBW)???? 

"Justbob30" <NoThank DeleteThis @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 DeleteThis @abuse.gov> wrote in message
> news:Xns99FDCE265B989jyanikkuanet@64.209.0.84...
>> "Andy" <blueflame1965 DeleteThis @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
 >> Stay informed about: Drive by wire (DBW)???? 

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

> Matt Ion wrote:
>> Richard Blaine wrote:
>>> "Andy" <blueflame1965.TakeThisOut@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
 >> Stay informed about: Drive by wire (DBW)???? 

Jim Yanik wrote:
> jim beam <spamvortex DeleteThis @bad.example.net> wrote in
> news:07SdnVrMkfRj78ranZ2dnUVZ_jmdnZ2d@speakeasy.net:
>
>> Matt Ion wrote:
>>> Richard Blaine wrote:
>>>> "Andy" <blueflame1965 DeleteThis @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.

no such thing that i've ever seen on a civilian road vehicle. honda is
simply mechanical power steering [just like any other car] but with
electronic control on the degree of assist.


> You are describing "throttle by wire".

which is referred to, by honda and other manufacturers, as drive 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.
>
>
 >> Stay informed about: Drive by wire (DBW)???? 

Jim Yanik wrote:
> "Justbob30" <NoThank.DeleteThis@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.DeleteThis@abuse.gov> wrote in message
>> news:Xns99FDCE265B989jyanikkuanet@64.209.0.84...
>>> "Andy" <blueflame1965.DeleteThis@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.


Drive by wire means that the linkages in a system are not all
mechanical. The system can be brakes, steering, throttle, etc.

http://en.wikipedia.org/wiki/Drive_by_wire

Jeff

> And by top posting,you destroy any logical continuity of the thread.
>
 >> Stay informed about: Drive by wire (DBW)???? 

Jim Yanik wrote:
> "Andy" <blueflame1965.TakeThisOut@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.
>


I agree. In airplanes (that receive continuous maintenance) it's ok but
not in cars many of which are driven by idiots or worse.

Give me a mechanical link to the function of steering, throttle and
brakes anyday!

OTOH, the L1011 is a fly by wire plane with a perfect safety record.

JT
 >> Stay informed about: Drive by wire (DBW)???? 

From Honda's website...
http://automobiles.honda.com/accord-sedan/features.aspx?Feature=drivebywire
Drive-by-WireT Throttle SystemInstead of a mechanical linkage from the
accelerator to the fuel-injection throttle, the Accord Sedan uses
Drive-by-Wire technology. The system uses an electronic position sensor
connected to the accelerator pedal that sends an electronic signal to the
Powertrain Control Module (PCM).

"Grumpy AuContraire" <Grumpy.TakeThisOut@ExtraGrumpyville.com> wrote in message
news:8lL5j.211000$kj1.56160@bgtnsc04-news.ops.worldnet.att.net...
>
>
> Jim Yanik wrote:
>> "Andy" <blueflame1965.TakeThisOut@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.
>>
>
>
> I agree. In airplanes (that receive continuous maintenance) it's ok but
> not in cars many of which are driven by idiots or worse.
>
> Give me a mechanical link to the function of steering, throttle and brakes
> anyday!
>
> OTOH, the L1011 is a fly by wire plane with a perfect safety record.
>
> JT
 >> Stay informed about: Drive by wire (DBW)????