From: Jeff Strickland on

"jim beam" <me(a)privacy.net> wrote in message
news:uqOdnfdrX4d5Lg_WnZ2dnUVZ_qKdnZ2d(a)speakeasy.net...
>
>> Fail safe and redundancy should be part of any
>> throttle system, but even that can fail, as have the simplest of
>> mechanical systems.
>
> indeed. statistically, mechanical throttles are much more unreliable.


STATISTICALLY?

I'd like to see any statistic you have ...

The facts are that save a few notable examples -- Audi -- there have been
virtually no known cases of unintended acceleration that involved vehicles
on the highway. The only known instances of wrong-pedal acceleration involve
vehicles in parking lots.

To be sure, there are exceptions -- the guy that drove his Buick through the
Farmer's Market in Los Angeles and ran over several people -- but the
exception is just that. An exception.

Statistically, the exception is not noteworthy. There is no statistic that
says mechanical throttles less reliable. Indeed, statistically speaking,
electronic throttle controls (fly-by-wire gas pedals) haven't been in use
long enough to be a statistically large enough sample to compare against the
decades of mechanical throttle mechanisms that have gone into millions upon
millions of vehicles.






From: Jeff Strickland on

"jim beam" <me(a)privacy.net> wrote in message
news:uqOdnfZrX4eWKQ_WnZ2dnUVZ_qIAAAAA(a)speakeasy.net...
>>
>> 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.
>
> why is it that people that don't know what they're talking about insist on
> having "opinions"?
>

I was wondering the same thing about you ...

You postulate stupid ideas that have absolutely no basis in reality.

The gas pedal has one job, make the car go. When the pedal is pressed the
car goes, when the pedal is not pressed the car stops going. It is not
expected to do anything more, or anything less. This function has taken
place for more than 100 years, and has never been a problem like what we
have today.




From: jim beam on
On 03/06/2010 12:28 PM, Jeff Strickland wrote:
> "jim beam"<me(a)privacy.net> wrote in message
> news:uqOdnfZrX4eWKQ_WnZ2dnUVZ_qIAAAAA(a)speakeasy.net...
>>>
>>> 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.
>>
>> why is it that people that don't know what they're talking about insist on
>> having "opinions"?
>>
>
> I was wondering the same thing about you ...
>
> You postulate stupid ideas that have absolutely no basis in reality.
>
> The gas pedal has one job, make the car go. When the pedal is pressed the
> car goes, when the pedal is not pressed the car stops going. It is not
> expected to do anything more, or anything less. This function has taken
> place for more than 100 years, and has never been a problem like what we
> have today.
>
>
>
>

1. you snipped the important bit. apparently you don't understand why
that was so.

2. you don't know what a rhetorical question is. next time, i'll let
you know it's rhetorical so you don't waste any more electrons.

--
nomina rutrum rutrum
From: jim beam on
On 03/06/2010 12:02 PM, Cameo wrote:
> "Jim Warman" <mechanic(a)telusplanet.net> wrote:
>>
>> Have we seen problems with Fords drive by wire? A very few, but
>> yes.... No unintended accelerations have been (AFAIK) documented.
>
> Have we seen problems with Toyota outside of the US? Are they making
> different cars for other markets?

c'mon dude, don't ask difficult questions that expose the logical
fallacy of this ridiculous protectionist witch hunt.


--
nomina rutrum rutrum
From: jim beam on
On 03/06/2010 09:41 AM, Jim Warman wrote:
> 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...

three inputs from the throttle pedal position sensor?



>
> Have we seen problems with Fords drive by wire? A very few, but yes.... No
> unintended accelerations have been (AFAIK) documented.
>
>
> "Jeff Strickland"<crwlrjeff(a)yahoo.com> wrote in message
> news:hmu1u8$uus$1(a)news.eternal-september.org...
>>
>> "jim beam"<me(a)privacy.net> wrote in message
>> news:fvudnV-hwr-Z6A_WnZ2dnUVZ_rednZ2d(a)speakeasy.net...
>>> 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]
>>
>>
>> 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.
>>
>>
>>
>>
>>
>>
>>
>>
>
>


--
nomina rutrum rutrum