Honda "Drive by Wire" question... what if the power goes out?

Discussion in 'General Motoring' started by David E. Powell, Nov 18, 2005.

  1. David E. Powell

    dold Guest

    There was a story in the news in the last few days. Mercedes was doing a
    demo of their braking control systems. Three Mercedes drove into the
    lecture hall, and they were each supposed to be brought to a stop entirely
    by the collision avoidance system.

    Three smashes later, they were, indeed, all stopped.
    The Mercedes story had something to do with an adjacent metal wall and
    echoes.

    This wasn't the brake by wire that failed, per se, but amusing anyway.

    <http://www.askaprice.com/torque-article.asp?article=Mercedes_makes_mess_of_safety_demonstration&item=669>
     
    dold, Nov 24, 2005
  2. David E. Powell

    SoCalMike Guest

    i think air brakes on 18 wheelers use the same principle. the air
    pressure forces the brake shoes apart. touching the brake releases
    pressure. so losing pressure would cause the brakes to lock.
     
    SoCalMike, Nov 24, 2005
  3. David E. Powell

    SoCalMike Guest

    i think air brakes on 18 wheelers use the same principle. the air
    pressure forces the brake shoes apart. touching the brake releases
    pressure. so losing pressure would cause the brakes to lock.
     
    SoCalMike, Nov 24, 2005
  4. Yes, they do. According to a History Channel program, pre-loaded pneumatic
    brakes were originally an important safety development for trains. If
    anything went wrong, the brakes would be applied. Before that, "brakemen"
    had to scamper to the tops of the cars in whatever the conditions were to
    apply brakes.

    Mike
     
    Michael Pardee, Nov 24, 2005
  5. Yes, they do. According to a History Channel program, pre-loaded pneumatic
    brakes were originally an important safety development for trains. If
    anything went wrong, the brakes would be applied. Before that, "brakemen"
    had to scamper to the tops of the cars in whatever the conditions were to
    apply brakes.

    Mike
     
    Michael Pardee, Nov 24, 2005
  6. David E. Powell

    Doug McCrary Guest

    Well, they are applied - they don't actually "lock". I'd expected they would,
    but on the vehicles I've tried it on, it just comes to a relatively controlled
    stop, without skidding. Yet those same vehicles will skid (lock) using the
    service brake. My yard service manager says this is by design.
     
    Doug McCrary, Nov 24, 2005
  7. David E. Powell

    Doug McCrary Guest

    Well, they are applied - they don't actually "lock". I'd expected they would,
    but on the vehicles I've tried it on, it just comes to a relatively controlled
    stop, without skidding. Yet those same vehicles will skid (lock) using the
    service brake. My yard service manager says this is by design.
     
    Doug McCrary, Nov 24, 2005
  8. Having written programs for x86 machines since DOS 3 was the hot ticket, I
    think you have a slanted view.

    What is perceived as "bloat" by the public is a combination of two factors:
    increased packaged data and the overhead required for proper structure. When
    I started it was considered pretentious to refer to an accomplished
    programmer as a "software engineer," whereas that is the minimum expected of
    any modern programmer; the senior programmers are "software architects." (I
    am neither, since it was only a sideline for me and I couldn't ride the
    rocket. I am still a "cowboy coder" who can knock out small applications and
    utilities without making a big mess of it.)

    Did you ever see a DOS machine run on a network? It was ugly - surely you
    recall the "share" TSR to make files multi-accessible. There were email
    readers in the DOS days, but do you recall a web browser?

    The good old days were good mainly because we know everything came out okay.
    However, in this case, we can go back. You can still load DOS on any modern
    Windows capable box. Go for it and let us know how it works out.

    Mike
     
    Michael Pardee, Nov 25, 2005
  9. Having written programs for x86 machines since DOS 3 was the hot ticket, I
    think you have a slanted view.

    What is perceived as "bloat" by the public is a combination of two factors:
    increased packaged data and the overhead required for proper structure. When
    I started it was considered pretentious to refer to an accomplished
    programmer as a "software engineer," whereas that is the minimum expected of
    any modern programmer; the senior programmers are "software architects." (I
    am neither, since it was only a sideline for me and I couldn't ride the
    rocket. I am still a "cowboy coder" who can knock out small applications and
    utilities without making a big mess of it.)

    Did you ever see a DOS machine run on a network? It was ugly - surely you
    recall the "share" TSR to make files multi-accessible. There were email
    readers in the DOS days, but do you recall a web browser?

    The good old days were good mainly because we know everything came out okay.
    However, in this case, we can go back. You can still load DOS on any modern
    Windows capable box. Go for it and let us know how it works out.

    Mike
     
    Michael Pardee, Nov 25, 2005
  10. This is the finest hair I've ever seen split!
     
    Sparky Spartacus, Nov 25, 2005
  11. This is the finest hair I've ever seen split!
     
    Sparky Spartacus, Nov 25, 2005
  12. Wow, do you have a cite for this?
    The post to which I replied said "changed", not "improved" - that's more
    of a philosophical discussion.
    Luxury! The first disk drives I worked with were the 2311s on the early
    IBM S/360s - 7.25 MB/pack (100 cyl x 10 heads, IIRC, 7,250 bytes/track).
    True, and computers don't do anything that a bunch of guys with abacuses
    couldn't also do, but time is a major factor - imagine a moon shot
    without computers or a lot of modern medicine.
    How'd you know I'm retired from the mainframe business (mostly
    programming them)?
     
    Sparky Spartacus, Nov 25, 2005
  13. Wow, do you have a cite for this?
    The post to which I replied said "changed", not "improved" - that's more
    of a philosophical discussion.
    Luxury! The first disk drives I worked with were the 2311s on the early
    IBM S/360s - 7.25 MB/pack (100 cyl x 10 heads, IIRC, 7,250 bytes/track).
    True, and computers don't do anything that a bunch of guys with abacuses
    couldn't also do, but time is a major factor - imagine a moon shot
    without computers or a lot of modern medicine.
    How'd you know I'm retired from the mainframe business (mostly
    programming them)?
     
    Sparky Spartacus, Nov 25, 2005
  14. These are all changes to the technology involved - did you mean
    something other than "changed", e.g., "improved"?
    Moving from a parallel interface to a serial one is certainly a *change*
    (your term, not mine).
    Since when? Are you going back to the 8088 chips? IBM 650 computers,
    701's, 7090's, etc.?
     
    Sparky Spartacus, Nov 25, 2005
  15. These are all changes to the technology involved - did you mean
    something other than "changed", e.g., "improved"?
    Moving from a parallel interface to a serial one is certainly a *change*
    (your term, not mine).
    Since when? Are you going back to the 8088 chips? IBM 650 computers,
    701's, 7090's, etc.?
     
    Sparky Spartacus, Nov 25, 2005
  16. You need better porn.

    ;)
     
    Sparky Spartacus, Nov 25, 2005
  17. You need better porn.

    ;)
     
    Sparky Spartacus, Nov 25, 2005
  18. So how much has GM made the past year? Ford? How about Honda & Toyota? Hmmm.
     
    Sparky Spartacus, Nov 25, 2005
  19. So how much has GM made the past year? Ford? How about Honda & Toyota? Hmmm.
     
    Sparky Spartacus, Nov 25, 2005
  20. So why did humans move out of caves?
     
    Sparky Spartacus, Nov 25, 2005
Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.