From: clare on 11 Mar 2010 16:06
On Thu, 11 Mar 2010 05:18:11 +0000 (UTC), "Rodan" <Rodan(a)Verizon.NOT>
>...(adding a gas pedal position sensor) has nothing to do with saving
>money. It costs more, it's more complex, it adds more electromechanical
>hardware and increases electrical, mechanical, and computer interfaces.
>It introduces multiple new failure modes, while yielding no significant
>improvement in gas mileage or pollution control. It is a money pit,
>a maintenance nightmare and a death trap waiting for a victim.
>"jim beam" wrote:
>not true. electronics are much more reliable. and they /do/ offer
>significant improvement in mileage and pollution control. they
>offer significantly better control for things like cruise control and
>automatic transmissions too.
>I may not be seeing the tradeoff benefits you refer to.
>How does adding a gas pedal position sensor provide:
> "significant improvement in mileage and pollution
> control and significantly better control for things
> like cruise control and automatic transmissions too" ?
You need to understand emission controls and engine control - which
you obviously don't, in order to understand HOW ECT makes it better.
From: clare on 11 Mar 2010 16:08
On Thu, 11 Mar 2010 10:39:46 -0000, "David Skelton"
>"dizzy" <dizzy(a)nospam.invalid> wrote in message
>> David Skelton wrote:
>>>I thought the main reason for ABS is to maintain steering control when the
>>>brakes were pressed too hard, so hazards could be avoided.
>>>But, ABS does not
>>>work so well in the very wet or icy conditions.
>> Sure it does. It can't perform miracles, however.
>No, it doesn't work so well in slippery conditions.
>In slippery conditions, it is much easier to lock all four wheels at once
>with a stomp on the brake pedal. Then the ABS controller cannot detect
>wheels turning at different speeds which is required to activate the ABS
>--- news://freenews.netfront.net/ - complaints: news(a)netfront.net ---
Oh, it detects the lockup all right - and RELEASES all 4 wheels to get
them turning again. Result? No brakes. They come back on again as soon
as the wheels start turning - locking all 4 again - - - - - - - -.
From: clare on 11 Mar 2010 16:08
On Thu, 11 Mar 2010 05:56:04 -0500, "Ed Pawlowski"
>"jim beam" <me(a)privacy.net> wrote
>> not always dude. stopping distances with abs can be considerably longer,
>> especially in conditions like snow.
>It allows for better steering control though, especially for the driver that
>does not know how to deal with those conditions.
Like I said - it makes sure you hit what you hit SQUARE ON!!
From: clare on 11 Mar 2010 16:09
On Thu, 11 Mar 2010 07:15:41 -0500, "Tom" <tc(a)comcast.net> wrote:
>"Ed Pawlowski" <esp(a)snetnospam.net> wrote in message
>> "jim beam" <me(a)privacy.net> wrote
>>> not always dude. stopping distances with abs can be considerably longer,
>>> especially in conditions like snow.
>> It allows for better steering control though, especially for the driver
>> that does not know how to deal with those conditions.
>in snow ABS enables you to steer in a straight line as much as possible
>brakes only results in a 180 or 360 turn or slide into a ditch. I doubt if
>not having ABS will stop as soon as with. I drive on snow covered hills a
>lot this year more than others ABS is better and yes I have been in cars
>without for years and have managed but not as good as with ABS. Have had a
>drivers license for 56 years.
In wet sloppy snow with wide tires, ABS is TERRIBLE.
From: clare on 11 Mar 2010 16:11
On Thu, 11 Mar 2010 06:23:24 -0800, jim beam <me(a)privacy.net> wrote:
>On 03/10/2010 10:45 PM, DC wrote:
>> "jim beam"<me(a)privacy.net> wrote in message
>>> On 03/09/2010 10:15 PM, Rodan wrote:
>>>> clare(a)snyder.on.ca wrote:
>>>> Toyota throttle has 2 hall effect sensors. The output of one tracks the
>>>> other but is offset. In other words, one starts at say, 0 volts, and
>>>> other at, say 1 volt - and they increase in step with each other.
>>> how can that be true???
>>> hall effect sensors are used for gross position detection, not small scale
>>> linear deflections. they can be used for "wot" detection, but their
>>> ability to work over a wide positioning range is limited. that's why
>>> they're used in timing for things like crank position [rotational] sensors
>>> where you're counting pulse rates, not graduation functions.
>> These linear Hall effect sensors do indeed exist - and being non contact are
>> arguably highly reliable
>interesting. but at >10x the price of a simple potentiometer solution,
>which is afterall, also known to be highly reliable, would an auto
>manufacturer really use one?
They use them all the time. They are not subject to wear, electrical
degradation, resistance change due to contamination, etc - etc. - etc.
Absolutely no reason NOT to use them as they are SIGNIFICANTLY more
reliable in the long term.