Roland@pcmtec Posted May 3, 2019 Share Posted May 3, 2019 The knock system on the Falcon is a separate chip within the PCM case. They use a ATM-40 compatible HIP-9010 knock chip from what I can tell (not 100% confirmed yet). The datasheet for this chip is attached. Every cycle the PCM sends the following values to the knock chip which are packed into 5 bytes. These values can be datalogged with our datalogging software which will be available soon. cd_sca= The value of the pre-scalar being sent to the ATM-40 cd_conf_y = Test/selection channel chosen on ATM-40 IC cd_fil_nx = The next bit point value of the bandpass filter centre frequency to be sent to the ATM-40 cd_gn_nx = The bit point value of the basic gain to be used to determine the next gain setting to be sent to the ATM-40 cd_int_nx = The next bit point value of the integrator time constant to be sent to the ATM-40 These values are generated from the various tables in the editor found under "knock sensor". Eg the window frequency etc is changed based on rpm and so is the integrator time constant. Most of this would never be changed. The PCM then reads back the knock energy detected each cycle and compares it to its sensitivity window for each cylinder. This is then used to determine spark retard. MORE TO COME LATER PART2 The following values can be datalogged regarding the knock sensor. These descriptions will be improved and catagorised as time goes on. hip9010.pdf 1 Quote Link to comment Share on other sites More sharing options...
Puffwagon Posted May 3, 2019 Share Posted May 3, 2019 Where do I plug my headphones in? ? 2 Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted May 3, 2019 Author Share Posted May 3, 2019 Just now, Puffwagon said: Where do I plug my headphones in? ? lol Quote Link to comment Share on other sites More sharing options...
JMSMotorsport Posted June 9, 2020 Share Posted June 9, 2020 What is the main channel to log to see knock occurring? Also when tuning the spark tables am I altering the MBT or Knock Edge Spark Tables or Both? Thanks. Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted June 9, 2020 Author Share Posted June 9, 2020 There are individual knock trims per cylinder and also an average knock adder that you can log. The following two items are what your want to log Individual cylinders SPKAD_IND[0-7] Average total SPKAD_IND_AVG Regarding spark have a read of the link below. Short answer is you can pick either. Quote Link to comment Share on other sites More sharing options...
JMSMotorsport Posted June 10, 2020 Share Posted June 10, 2020 Perfect answer, i thought could use one or the other but wanted to clarify. 1 Quote Link to comment Share on other sites More sharing options...
Romulus Posted September 12, 2020 Share Posted September 12, 2020 Bump. How can sensitivity be reduced? Quote Link to comment Share on other sites More sharing options...
Puffwagon Posted September 12, 2020 Share Posted September 12, 2020 It's a secret Quote Link to comment Share on other sites More sharing options...
Puffwagon Posted September 12, 2020 Share Posted September 12, 2020 1 hour ago, Romulus said: Bump. How can sensitivity be reduced? Open PCMTec and type in "knock sensitivity" into the search bar and it'll come up. The enthusiast version has the sensitivity tables and the professional version has the knock window variables as well. In my experience you don't want to reduce the numbers in the tables by more than 20% otherwise the knock sensors won't work. You can work out what the safe numbers are yourself if you are inclined, by using knock ears, logging and spending the time to dial the tables in entirely. In this regard it's similar to dialing in cam timing. You need to have free dyno time and know how to do it yourself, or have money to burn. 1 Quote Link to comment Share on other sites More sharing options...
Romulus Posted September 12, 2020 Share Posted September 12, 2020 Thanks. Doing some reading elsewhere that is what is also suggested. I'm data logging around 1 deg KR during cruise with the stock MBT tables with the built engine so I know I need to adjust the sensitivity. Quote Link to comment Share on other sites More sharing options...
Puffwagon Posted September 12, 2020 Share Posted September 12, 2020 My suggestion is to use knock ears and adjust from there. You can switch them off but you need to work out for yourself if it's the right thing to do. Needless to say, don't just switch them off because someone said it'll be fine. It might be fine and it might not be. 1 Quote Link to comment Share on other sites More sharing options...
JB83 Posted March 25, 2021 Share Posted March 25, 2021 Hi guys, first time posting here. I've been trying to find the knock sensor channels to log as above but cant find them anywhere, i have only got the enthusiast software for now. Is this why i cant find them? Quote Link to comment Share on other sites More sharing options...
JB83 Posted March 25, 2021 Share Posted March 25, 2021 Sorry folks i have found them now, still trying to get my head around everything, so much going on in this software its awesome! 1 Quote Link to comment Share on other sites More sharing options...
john.z Posted October 9, 2023 Share Posted October 9, 2023 Getting no feedback from cylinder one knock spark adder, reads only 0. The other 7 cylinders record fine. Any insight on what's going on there? Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted October 9, 2023 Author Share Posted October 9, 2023 2 hours ago, john.z said: Getting no feedback from cylinder one knock spark adder, reads only 0. The other 7 cylinders record fine. Any insight on what's going on there? Define read fine? As in they are detecting knock? It is possible you don't have knock on all cylinders. Quote Link to comment Share on other sites More sharing options...
john.z Posted October 9, 2023 Share Posted October 9, 2023 5 hours ago, Roland@pcmtec said: Define read fine? As in they are detecting knock? It is possible you don't have knock on all cylinders. I'm playing around to see whats real and fake knock, this is the first run where Ive heard a ping through my knock ears. Even so, they're always reading something above 0 at WOT, except for cylinder 1. Even throughout cruising with bumps and gear changes etc, the others will at some stage do something, just not cylinder 1. Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted October 10, 2023 Author Share Posted October 10, 2023 Could you try logging cylinder 7 and see if they are offset. Quote Link to comment Share on other sites More sharing options...
john.z Posted October 10, 2023 Share Posted October 10, 2023 14 minutes ago, Roland@pcmtec said: Could you try logging cylinder 7 and see if they are offset. 10-10-2023 12-23-52 PM Log.teclog Here's that log, what do you mean? Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted October 10, 2023 Author Share Posted October 10, 2023 I'm on my phone. Is cyl 7 showing knock or 0? I rarely have time to read the forums on a PC. Quote Link to comment Share on other sites More sharing options...
Puffwagon Posted October 10, 2023 Share Posted October 10, 2023 6 minutes ago, Roland@pcmtec said: I'm on my phone. Is cyl 7 showing knock or 0? I rarely have time to read the forums on a PC. Cylinder one knock level stays at zero through the whole log. Every other cylinder is showing various levels of knocks at various times. Quote Link to comment Share on other sites More sharing options...
Roland@pcmtec Posted October 10, 2023 Author Share Posted October 10, 2023 Ok thanks Quote Link to comment Share on other sites More sharing options...
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