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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 |
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. |
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 |
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 |
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. |
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 |
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. |
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. |
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 |
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 |
Re: Drive by wire (DBW)????
Jim Yanik wrote:
> "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. 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. > |
Re: Drive by wire (DBW)????
Jim Yanik wrote: > "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. > 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 |
Re: Drive by wire (DBW)????
Jim Yanik wrote:
> 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. 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. > > |
Re: Drive by wire (DBW)????
Jim Yanik wrote:
> "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) > 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 |
Re: Drive by wire (DBW)????
From Honda's website...
http://automobiles.honda.com/accord-...re=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@ExtraGrumpyville.com> wrote in message news:8lL5j.211000$kj1.56160@bgtnsc04-news.ops.worldnet.att.net... > > > Jim Yanik wrote: >> "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. >> > > > 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 |
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