Does anyone here know, EXACTLY how the throttle by wire on the ralliart works? Or any TBW for that matter. I know the throttle SENSOR is by the front passenger side headlight, but I was really curious of how the throttle plate in the intake moves? How can it adjust, electronically, as fast as a mechanical/cable type throttle? With a regular throttle, I mat the pedal, as i'm matting the pedal, the wire pulls the plate open, the TPS sees this and the ECU opens the injectors longer. Seems simple and quick. With TBW, I mat the pedal, the cable pulls the electronic sensor to WOT, the sensor must tell the ECU this, the ECU must have to adjust/open the mechanical plate and then adjust the injectors.
I just don't understand how it can be faster than a mechanical system. I also don't know what system/device is used to mechanically open the throttle plate.
Does the 4g63 in the other Lancers used TBW?
A website explaining TBW in detail would be a big help.

 

You've got it in a nutshell. I don't know why they chose to put it in the RA, without making the Mivec throttle-sensitive. It's useful for only one thing in the RA, as far as I've seen: the cruise control is very smooth.

Do a google search for "throttle by wire" with the quotes, and read some of the results. Interesting stuff. GM's planning to use it for "displacement on demand", where the ECU shuts off 1/2 of the cylinders in a 6 or 8 when you don't need 'em. With TBW, the ECU can open the throttle plate just a little bit when it shuts off the cylinders, so the driver never even notices the change.

It's also kinda scary, though. I'd hope it fails SHUT rather than OPEN when it goes, like a cable would.

 

LOL true about failing. I'm sure the idle position is some sort of 0 value or an "off" value for the sensor.
I was mostly trying to figure out what device controlled the throttle itself. True about the cruise control too. TBW apparently gives better MPG (we need every bit of fuel mileage lol) and smoother throttle changes with more response.
I did a quick search on google but didn't see anything explaining the device that controls the throttle. I'm a detail-fascinated person who finds complicated things and has to know every last aspect of their operation. I'm the guy who learns how the coolant pumps of a nuclear reactor works. I need to know, down to the details, how something complicated works.

 

In a TBW system the throttle body plate is controlled by a solenoid that is adjusted by the ECU. You'd be suprised how quickly adjustments can be made electronically - take for example an F-16 fighter craft: the computer for the f-16 has to constantly make several adjustments to the flight surfaces of the aircraft every second in order for it to fly stable. Considering the F-16 was designed in the 70's - and how weak computers were back then - it should be relatively easy for an ECU nowadays to make the adjustments just as quickly, and it doesn't have to make as many of them either.

 

Probably a stepper motor. Then the ECU can just count steps to get a certain throttle percentage.
I have a 2" ball bearing from a pump from the nuclear sub I was on.

 

you could try www.howstuffworks.com . they might have an article on it.