electronic throttle
in [Technical]
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From: clare on 12 Mar 2010 16:56 On Fri, 12 Mar 2010 14:02:56 -0000, "David Skelton" <skellyd8758(a)NOSPAMsky.com> wrote: > >"dizzy" <dizzy(a)nospam.invalid> wrote in message >news:mn4jp51loeptkviqg72lrl4gng8p5suh54(a)4ax.com... >> David Skelton wrote: >> >>>>>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. >> >> I'd love to see you prove that statement. It's a fact beyond dispute >> that it aids stability and control... >> >>>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 >>>system. >> >> A) Does that really work? B) Why the HELL would you want to do that? >> > >A) I've done it. Locked up all four, went sideways, released the foot brake >and steered into the slide, went the other way. We do not get much snow >here, nor ice, usually... > >I have commented before about the (IMO) ridiculous width of tyres BMW put on >their cars. > >B) If some half blind deaf twerp steps out in front of your car, then it is >natural to try to stop quickly, isn't it ??? > >The day I got my first car (it was older than me), there was 3 inches of >snow on the ground. I had only had 13 driving lessons before passing the >test two weeks before (second attempt) so I did not have a lot of experience >on 4 wheels. I had a LOT of fun that night. But that was in the early 80's. >I'm more cautious now, and the cars cost a LOT more. ;-) > >Another time, I was in a old car without ABS, I realised that because I was >not slowing after applying the brakes (all wheels locked), I was actually >pushing the pedal harder. Luckily, I became aware of what was happening and >released the pedal. > >Maybe there should be " skidpan training" for all learners. >I personally think that all car drivers should spend a year or two on >motorcycles before driving a car to become more aware of surface condition >changes, and how that affects grip. > >best regards > >David > > >--- news://freenews.netfront.net/ - complaints: news(a)netfront.net --- Better than half would never make it to the car.
From: Clive on 12 Mar 2010 18:23 In message <hnamth$h5f$1(a)news.eternal-september.org>, Tom <tc(a)comcast.net> writes >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. I've had mine for 45 years, I wouldn't swap any car with it for a car without. -- Clive
From: Clive on 12 Mar 2010 18:40 In message <aicjp59f0k3r9i2vgk7rl0js0h4dnh3rdq(a)4ax.com>, clare(a)snyder.on.ca writes >And with the Graspics I can actually stop on black ice. If you think you can stop on "Black Ice" then you've never been on it. -- Clive
From: Jim Warman on 12 Mar 2010 22:47 Actually, in Ford-speak anyway, it is called CAN (controller area network)... Not to be confused with other computer (module communications) networks on the modern automobile (we have had many networks and multiple networks on the same car... as many as three separate networks on one vehicle in the past). Today, the Fords in the showroom have only two networks... high speed CAN and medium speed CAN.... And it isn't a bus... it is a BUSS. The BUSS is the two wire "common" that joins all the HS CAN modules through the HS CAN+ and the HS CAN - or the MS CAN+ buss and the MS CAN- buss that joins all of the MS CAN modules. There will be at least one module connected to both networks and sometimes there might be two (I haven't seen any networks that have three "sharing" modules). There will be one "gateway" module... this is the module that good scan tools will use to access other modules no m atter what network they are part of... Now... the reason for two networks should be somewhat obvious. Some module functions (engine control, braking, shift control and some other critical functions) need to happen quickly and need to have high input scan rates. Other functions (HVAC, entertainment/navigation modules - "creature comfort" modules and "electronic toy" modules) can live with lower scan rates and "slower" functionality - cheaper to build.... It shouldn't be much longer before we progress to the next level regarding automotive communications networks and anything I can say will, overnight, become ancient history. Baud rates will increase, module functionality will increase, the modules will have improved self diagnosis. Like the computer on your desk - if you have a car in your driveway, the module communications network will be already obsolete... They are now perfecting the next generation of electronic miracles. <clare(a)snyder.on.ca> wrote in message news:8r4dp5pt1eh39nj0svbleq1942unm8qp63(a)4ax.com... > On Mon, 08 Mar 2010 19:29:18 -0800, jim beam <me(a)privacy.net> wrote: > >>On 03/07/2010 09:27 PM, Jim Warman wrote: >>> Actually, in the modern automobile, the gas pedal tells the PCM that you >>> want to go faster... >>> >>> A lot of you folks are gong to be disappointed in the near future... >>> >>> The headlight switch tells the BCM that you want to turn on some >>> lights... >>> the turn signal switch tells the BCM that you wnat to turn on some >>> flashing >>> lights... >>> >>> This is gonna be cool... >> >>don't german cars already do this? one power line, one signal line, and >>reader/switch modules on each light? >> >> >>> > > > Not just German - but BMW is in for the lang haul. > > It's called CanBus >>> >>> "Jeff Strickland"<crwlrjeff(a)yahoo.com> wrote in message >>> news:hmuep4$qd2$1(a)news.eternal-september.org... >>>> >>>> "jim beam"<me(a)privacy.net> wrote in message >>>> news:uqOdnfZrX4eWKQ_WnZ2dnUVZ_qIAAAAA(a)speakeasy.net... >>>>> On 03/06/2010 09:03 AM, Jeff Strickland wrote: >>>>>> "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. >>>>> >>>>> yeah, that meets conditions 3.a& 3.b. oh, wait, no it doesn't. >>>>> >>>> >>>> >>>> This is the most important part? >>>> >>>> It's nonsense! The gas pedal does two things, opens the throttle plate >>>> and >>>> closes the throttle plate. Period. >>>> >>>> You should ride the bus. >>>> >>>> >>>> >>>> >>>> >>> >>> >
From: dizzy on 12 Mar 2010 22:59
clare(a)snyder.on.ca wrote: >On Thu, 11 Mar 2010 19:07:57 -0600, dizzy <dizzy(a)nospam.invalid> >wrote: > >>clare(a)snyder.on.ca wrote: >> >>> In wet sloppy snow with wide tires, ABS is TERRIBLE. >> >>Nonsense. > You drive in sloppy wet snow conditions much?? Yes. Plenty. |