Announcement

Collapse
No announcement yet.

Cruise Control Question

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • Cruise Control Question

    Just wondering if anyone knows this, i don't know much about cars so

    Does the ECU control and keep the values for cruise control or is it kept on a seperate computer?

    It would be nice to have cruise control which acts like normal cruise control but is activated via my computer - Just a thought.
    CarComputer Status: New Car & Broken (Motherboard Fried)
    Owen JH | My Linux Blog | The Tech Fellows

  • #2
    Depends on the car. Some of them use vacuum to maintain your speed, putting it out of reach of influence of your car PC. The others that DO use the ECM won't be all that willing to allow you to input your own values to set a speed, unless the AutoTap or other software gives you that ability. The thing is, those programs provide an interface command structure to the actual programming language of the ECM, and last time I checked, none of the auto companies take kindly to a private entity trying to break their proprietary property.

    In the end, you can monitor your speed, but it may be next to impossible to set one of your own with currently available (private sector) technology.
    The ALEXIS Project
    MP3---VIDEO---GPS---REARVIEW---OBD---SKINNING
    Color Coding :
    DONE / MOSTLY DONE / BASE FEATURES / WORKING CONCEPT / NO CODE COMPLETED

    Comment


    • #3
      Figures, would be nice tho. Figure they use the same ECM on each cavalier they make and the cruise control is just a $200 option when you buy the car.
      CarComputer Status: New Car & Broken (Motherboard Fried)
      Owen JH | My Linux Blog | The Tech Fellows

      Comment


      • #4
        i wanted to hook up my GPS to the cruise control in order to automatically change my speed based on the speed limit, but i havent figured out how to do it
        Debt as of 1/1/05: $34,354.48
        Debt as of July 4, 2007: $0.00 explanation
        I'M DEBT FREE!!
        I'm now a reasonably successful gunblogger.

        Comment


        • #5
          Originally posted by wizardPC
          i wanted to hook up my GPS to the cruise control in order to automatically change my speed based on the speed limit, but i havent figured out how to do it
          Heh, that WOULD be cool, but then again, speed change areas are usually pretty obvious, and that's one thing you would likely be better off leaving under your control rather than forgetting about it and letting the computer do it for you.
          The ALEXIS Project
          MP3---VIDEO---GPS---REARVIEW---OBD---SKINNING
          Color Coding :
          DONE / MOSTLY DONE / BASE FEATURES / WORKING CONCEPT / NO CODE COMPLETED

          Comment


          • #6
            Well, i was thinking about cruise control for the interstate and having it turn off when yuo hit the brake (not sure how one would go about getting that from ECU) just like the factory control but setting it on the carputer - cool idea but would not be worth the money to implement tho
            CarComputer Status: New Car & Broken (Motherboard Fried)
            Owen JH | My Linux Blog | The Tech Fellows

            Comment


            • #7
              Well, here's a different take on the other idea though: What if it could be connected to GPS and kept track of speed limits in certain areas, then alerted you if you went over by... oh say... five miles an hour? Might be nifty.
              The ALEXIS Project
              MP3---VIDEO---GPS---REARVIEW---OBD---SKINNING
              Color Coding :
              DONE / MOSTLY DONE / BASE FEATURES / WORKING CONCEPT / NO CODE COMPLETED

              Comment


              • #8
                That is a good idea, I always wanted a radar that detects how fast people are going, then give the local police departments the reports on their units. GPS speed would be nice but I would find it annoying. Would be good if you had a kid, you could see how fast they were going and log it to a file and make sure they weren't racing :-D
                CarComputer Status: New Car & Broken (Motherboard Fried)
                Owen JH | My Linux Blog | The Tech Fellows

                Comment


                • #9
                  hello big brother
                  car computer rev 5: 8" lilliput and usual suspects

                  Comment


                  • #10
                    I had thought about it with some kind of device on signs that tells the car how fast it could go, but with GPS it would be even cooler. Would be a pain in the butt for the roads you drive every day tho.
                    CarComputer Status: New Car & Broken (Motherboard Fried)
                    Owen JH | My Linux Blog | The Tech Fellows

                    Comment


                    • #11
                      Originally posted by owenjh
                      That is a good idea, I always wanted a radar that detects how fast people are going, then give the local police departments the reports on their units. GPS speed would be nice but I would find it annoying. Would be good if you had a kid, you could see how fast they were going and log it to a file and make sure they weren't racing :-D
                      There are logging programs for ODB-II that can log the speed. Also, there are direct plug ins that you can read after the fact via computer interface. Not radar like you're describing but just something neat.

                      They're good for keeping track of your kids and logging your performance. Mast of you know, but I figured I'd bring it up for anyone that doesn't

                      Comment


                      • #12
                        I don't know of any vehicles that actually use the ECU as part of the CC.On a cavalier it would be pretty easy to control the CC.Method 1- there is a CC module under your hood(it has a cable going to the throttle plate), it gets a speed signal from the speed sensor(blue wire at the module if I remember).The speed sensor puts out 4000 pulses per mile, just intercept the signal and adjust it higher or lower.Method 2(easiest)-Use the Set ACC and the Coast wires coming from the switch.When you want it to accelerate pulse the SET ACC wire, when you want it to deaccelerate pulse the coast wire..Either of these could easily be accomplished with minor software and the parallel port(buffered with some transistors).Or with the serial port buffered by a microcontroller with the appropriate firmware.You could use the speed sensor/abs sensor or OBD/OBDII(or a GPS) to get the speed signal.These methods should work on all vehicles regardless of what controls the CC.I can probably help if anyone wants to do this.

                        Comment


                        • #13
                          Erm, 1 problem with my car..... I don't have factory cruise control. But I do think that GM builds thier cars all the same and then if you don't want something they just cover it with a piece of plastic. Maybe I will save this project for down the road. Anyone else can and should feel welcome to take my idea :-D
                          CarComputer Status: New Car & Broken (Motherboard Fried)
                          Owen JH | My Linux Blog | The Tech Fellows

                          Comment


                          • #14
                            Originally posted by owenjh
                            That is a good idea, I always wanted a radar that detects how fast people are going, then give the local police departments the reports on their units. GPS speed would be nice but I would find it annoying. Would be good if you had a kid, you could see how fast they were going and log it to a file and make sure they weren't racing :-D
                            You can buy radar guns on ebay.
                            My Yahoo Group http://groups.yahoo.com/group/signalsweepers
                            My Web Page http://www.geocities.com/maltshopmemories/
                            My Webshots http://community.webshots.com/user/signalsweeper

                            Comment


                            • #15
                              Originally posted by owenjh
                              That is a good idea, I always wanted a radar that detects how fast people are going, then give the local police departments the reports on their units.
                              Hello big brother indeed. I shouldn't even post this - I'll probably get pulled over for speeding tonight.


                              I'm baffled (yes, baffled). Are you a cop? I'm just trying to figure out

                              a) why you'd want to do that
                              b) why you'd want to do that
                              c) how that information will be useful
                              d) why you'd want to do that

                              I don't know about you, but I have enough going on to not worry about how fast every person around me is driving. Do you listen to people's phone conversations on a scanner all night and make a log of that too?

                              Creating a log and then transmitting the information to police? I don't really know what to think of that - other than it's ridiculous.

                              MD

                              Comment

                              Working...
                              X