electronic throttle

if you buy all this fear-mongering idiocy that electronic throttle is a problem, and that brakes, transmissions and ignition kill switches can all simultaneously fail causing a driver to lose control, it might be
worth auto manufacturers of all stripes to adopt a slightly different implementation of electronic throttle [e.t.] - if not for mechanical reasons, but to shut the idiots up.
first, lets understand e.t. functionality:
1. open the throttle when demanded 2. close throttle when demanded 3. allow "demand" to account for additional requirements like     a. de-throttle on shifting for automatics,     b. throttle appropriate to load at high demand [eg. full throttle at low rpms can choke an engine and significantly reduce output - thus de-throttle until revs support full open]
if we analyze the above [which is not exhaustive, but representative], we find that in almost all situations, an e.t. needs to be more closed than demanded, but seldom, if ever, more open. thus the "solution" to the fear-mongering might be to have the throttle opened mechanically - i.e. old fashioned cable linkage, but have the computer control a closer device. thus, all the above can be implemented electronically, but whenever the driver lifts their foot, the mechanical closure cannot be over-ridden. and the throttle can never be more open than the mechanical throttle command.
this would not only address the "potential" for a runaway failure [although how exactly a computer is supposed to fail such that it won't switch off, disables brakes, disables transmission select, but still runs its injection code is something i have never seen explained, even by the most strident "but it must be the electronics" crowd], but it would also remove the single most annoying thing i have ever experienced in any vehicle driving experience: chevy's idiot idea that they need a multi-second delay between foot pedal movement and e.t movement. anyone that's ever tried to drive a chevy hhr on a winding mountain road knows what i mean.
y'all can now wait for at least 10 years for arrival, but i throw it out there for what it's worth.
--
nomina rutrum rutrum

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The functionality is even easier than that -- open the throttle plate when the gas pedal is pressed and close the throttle plate when the gas pedal is released. You can get bogged down in semantics if you want, but the functiionality is really that simple Go when the pedal is pressed and stop going when the pedal is released. At the end of the day, anything else is a variation on pushing the pedal down or releasing the pedal so that it comes back up.
When or why one might press or release the pedal has no bearing on the discussion. The only thing that matters is the expecation that the car goes faster when the pedal is pressed and stops going faster when the pedal is held at a mid-point, and slows when the pedal is released.
When the throttle control system does those things, then it is doing its job.
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The cross posting sucks.. but you guys seem to like it....
Toyota is having trouble... Ford isn't (I'm reading this in a Ford NG and I work at a Ford dealer).
Drive by wire throttle is a natural progression (if you can't see where the future of the automobile is going - I feel sorry for you). It allows for precise (hopefully) control of any electronic stability features, It allows for torque limiting when appropirate... reducing the need for other traction control measures (such as active brake booster application) when necessary...
Fords system relies on redundancy... I'm not a Toyota tech so I can't tell you what they do... Fords system has three inputs..(one of them is inversely proportional). If the inputs aren't "coherent", the car will remain at idle...
Have we seen problems with Fords drive by wire? A very few, but yes.... No unintended accelerations have been (AFAIK) documented.


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Have we seen problems with Toyota outside of the US? Are they making different cars for other markets?
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wrote:

Do the places "outside" the US have the same regulatory and reporting structure for such defects? If not, then it's not likely you "see" problems.
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