2006-11-02 15:44:54 · 6 answers · asked by kimchee_boi 3 in Cars & Transportation ➔ Other - Cars & Transportation
The throttle control does not use an accelerator cable with drive by wire. Instead of an accelerator cable between the pedal and the throttle body, there is a sensor on the gas pedal that reads how far the pedal is pushed down that then controls an electric motor on the throttle body that opens the throttle.
2006-11-02 15:49:42 · answer #1 · answered by yugie29 6 · 3⤊ 0⤋
Drive by wire means that there is no mechanical connection between the gas pedal and the throttle on the engine. it is all electronically controlled via 2 different throttle position sensors. 1 is mounted on the actual throttle on the engine that also has an electronic motor inside. this electronic motor does the actual opening and closing of the throttle plate. the second TPS(throttle position sensor) is actually an Accellerator position sensor (APS) that is mounted to the gas pedal that you push on with your foot. This sensor via the pcm(powertrain module) tells the TPS at the throttle what your foot is doing and in turn opens and closes the throttle accordingly.
So the old days of an actual cable or linkage from your gas pedal to the throttle plate are gone. Nearly every car manufacturer is going this direction. There is less chance of a throttle cable sticking wide open and causing a bad situation then a electronic throttle.
yes When an electronic throttle breaks you loose acceleration, but the same rings true when you break the good old throttle cable.
Hope that answers your question.
2006-11-02 23:58:57 · answer #2 · answered by Magikmann 4 · 1⤊ 0⤋
There's no direct connection, there's a computer betweeh the control and the thing it operates.
Typically they are talking about the throttle. So in my VW when I stand on the gas pedal I just compress a spring and turn a sensor which then knows how much throttle I want. The engine management computer then looks at the engine speed and load and other parameters and decides how much it should really open the throttle. It's supposed to make the car drive better because the computer can take into account more things than you can, but it can give non-linear response and wierd effects. My 2003 v6 Passat is the worst manual transmission car I have owned, it is far esier to stall than my 1979 Audi was and that with an extra 75 horsepower and twenty years of develoipment. I believe Subaru has now provided a variable response control for their 2.5 turbo engines so that owners can match the performance of the throttle system to what they expect or are comfortable with.
On the up side, it makes the cruise control work much better than they used to.
Alll in all, I'm not a fan of DBW.
2006-11-02 23:47:58 · answer #3 · answered by Chris H 6 · 2⤊ 2⤋
Yungi29 is right. Even military and probably most commerical aircraft do NOT have mechanical linkage to all the controls. It is done by computers and electrical wiring that carries the signal to the proper controls. Pops
2006-11-02 23:53:46 · answer #4 · answered by Pops 6 · 1⤊ 0⤋
Basically, drive by wire is a computer sensing your input and driving conditions and such, and can compensate, like it can sense when you are trying to rapidly avoid something rather than a normal turn, so each turn of the steering wheel turns the wheels faster. Normally, steering is directly controlled by hydraulics with the same force applied, no matter what the situation.
2006-11-02 23:54:38 · answer #5 · answered by Cheez_Mastah 3 · 0⤊ 3⤋
No mechanical linkage, the entire system is run on electrical impulse.
2006-11-03 00:03:00 · answer #6 · answered by Anonymous · 0⤊ 0⤋