Knock Detection with variable sensitivity over RPM

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maximuscr31
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Re: Knock Detection with variable sensitivity over RPM

Post by maximuscr31 »

jsmcortina wrote:He was meaning viatrack.ca but yes that is a different device. This topic is about HOODEY's mysterious device that suffers from history re-writing with post editing and deletion.

James
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HOODEY
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Re: Knock Detection with variable sensitivity over RPM

Post by HOODEY »

http://www.msextra.com/forums/viewtopic ... 6&start=80

Good work guys. Well I see this also has to go through the riggers of live testing.
as there is no magic pill for creating a new product.

My product is still available for testing and evaluation. Would love a side by side comparison as both
products use the same techniques (TPIC8101). I am however using a dedicate 40 mhz 100ns instruction cycle processor whose only job is to detect knock. The firmware it is written in assembly so it will be rediculously quick.

This can also serve as a generic knock detection system and does not have to be tied solely to the ms.
Both product have their niche when it comes to knock detection.

Serious highly skilled Volunteers required(tpsretard) ?????
bobworkman
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Re: Knock Detection with variable sensitivity over RPM

Post by bobworkman »

So how do I go about getting this for testing???
lagos
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Re: Knock Detection with variable sensitivity over RPM

Post by lagos »

I'm fairly new to MS and just bought a diypnp unit.
Having functionality similar to ms3 would be nice, but seeing as how this is 100% untested in the real world, a $200 price tag is a bit hard to swallow. For all we know it may not work correctly under real world conditions.
HOODEY
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Re: Knock Detection with variable sensitivity over RPM

Post by HOODEY »

WestfieldMX5
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Re: Knock Detection with variable sensitivity over RPM

Post by WestfieldMX5 »

:|
Last edited by WestfieldMX5 on Mon Mar 21, 2016 2:34 am, edited 1 time in total.
2016 Westfield SEiW MX5 1.8 - 6sp - Torsen - MSM turbo - MS3 Pro - 2.3kg/hp
Kranked
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Re: Knock Detection with variable sensitivity over RPM

Post by Kranked »

hi,

can anybody help me how can I install this knock circuit?
Image
I don't understand what is the difference between Vref and +5V, what is the C01 point above the IC U2.
I build the circuit and would like to test is...please help!
I have MS2 V3, my Tacho output is JS10, and in tunerstudio I can select JS4 and JS5 for knock input pin.
I see C01 is a capacitor on MS1 V2.2 but what about V3 PCB? Where can I connect that pin?

Thanks!
Trev16v
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Re: Knock Detection with variable sensitivity over RPM

Post by Trev16v »

Hi,

That schematic is my own modified version of the OP's original one.

If you go back many, many pages, you'll find my explanations.

You'll also come across the nonsense I endured from one particular individual which ultimately put me off contributing to this thread.

IMHO ignore this complete car crash of a thread and buy a proven knock unit.

Trev
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miragetbo1997cc
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Re: Knock Detection with variable sensitivity over RPM

Post by miragetbo1997cc »

I have some boards that have been tested on for 6 months now. I have made 3 beta boards and 3 final boards. Uses TPIC8101 and ATmega 328. 2 on a MS2 and 2 standalone(by themselves).

Image

Edited on 5/28/2014 (picture was of old design)
Last edited by miragetbo1997cc on Wed May 28, 2014 6:30 am, edited 1 time in total.
1985 Chevy ElCamino 350 TPI ,MS-II extra
1981 Datsun 210 SR20DET
1989 Dodge Colt AWD Turbo 2.0.

LilKnockMeter http://www.insaneimportperformance.com
Digital Knock Gauge,Analog and audio.Works with MS1 and MS2
federikg
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Re: Knock Detection with variable sensitivity over RPM

Post by federikg »

Hi, very good post.

I´m trying to make a Knock sensor display too.Does anyone have the knockcircuit.zip file ? because the unoturbo.com.br doesn´t work

Sincerly
miragetbo1997cc
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Re: Knock Detection with variable sensitivity over RPM

Post by miragetbo1997cc »

I have two boards available. Next batch won't be ready for a few weeks.I'm trying different cases to see what would work. Working on a two channel version.
EDITED Currently instock.
1985 Chevy ElCamino 350 TPI ,MS-II extra
1981 Datsun 210 SR20DET
1989 Dodge Colt AWD Turbo 2.0.

LilKnockMeter http://www.insaneimportperformance.com
Digital Knock Gauge,Analog and audio.Works with MS1 and MS2
miragetbo1997cc
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Re: Knock Detection with variable sensitivity over RPM

Post by miragetbo1997cc »

Is variable sensitivity even needed ? I've tested knock at lower to mid rpms and its always louder than the engine background noise . Maybe at a higher rpm raise the frequency being listened for?
1985 Chevy ElCamino 350 TPI ,MS-II extra
1981 Datsun 210 SR20DET
1989 Dodge Colt AWD Turbo 2.0.

LilKnockMeter http://www.insaneimportperformance.com
Digital Knock Gauge,Analog and audio.Works with MS1 and MS2
Spilly
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Re: Knock Detection with variable sensitivity over RPM

Post by Spilly »

Hey guys. I am an electrical and computer engineering student. I've been working on a solution for this for about six months now.

The primary advantage of the TPIC8101 is the ability to window your listening period to limit false positives due to valve train and other engine noise. I'm not sure on the algorithm that MS3 knock setup uses, but I have successfully created my own code to do this. Since the time between valves opening and closing varies with rpm, you need to adjust the time constant accordingly. My current code does this as well as digitally adjustable gain, and bandpass filter.

Unfortunately the current code is very limited due to the way I am calculating crank position and is only currently applicable to a 12 tooth crank sensor and a 1 tooth cam sensor. Also, the code is written for a propeller microcontroller in a somewhat C language using the simpleIDE compiler.

I am successfully interfacing it with my MS2 on a Toyota 4AGE 20v. The propeller is simply sending the MS2 a pulse to indicate knock. This allows use with the current tunerstudio and msextra firmware.

I am cleaning up some equations to make applying my code to other applications relatively easy. Once I feel the code is easy for another programmer to follow, I will be releasing it under an open source GNU General Public License.

I am also working on a board that will provide dual inputs, hardware adjustable gain, oscillator circuit, and everything else needed to get the TPIC8101 functional and able to be interfaced with a microcontroller. This will also be released under an open source GNU General Public License.

I am shooting to have this finished by the end of summer. Please keep in mind I am working on this in between classes during my free time.
Spilly
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Re: Knock Detection with variable sensitivity over RPM

Post by Spilly »

HOODEY
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Re: Knock Detection with variable sensitivity over RPM

Post by HOODEY »

Preview of Advance knock detection for Nissan 350z.


https://www.youtube.com/watch?v=w-d_dUc6H10
HOODEY
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Re: Knock Detection with variable sensitivity over RPM

Post by HOODEY »

Alternative to on board knock detection.



http://www.ebay.com/itm/252105863847?ss ... 1555.l2649
racingmini_mtl
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Re: Knock Detection with variable sensitivity over RPM

Post by racingmini_mtl »

HOODEY wrote:Alternative to on board knock detection...
I'm surprised you still think it's a good idea to post here.

For those who wonder what I'm talking about, you might be able to understand by going through the whole thread and seeing that there's been a lot of information that has been voluntarily hidden by the guy once he had enough to make a working product from other people's work.

Jean
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kjin
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Re: Knock Detection with variable sensitivity over RPM

Post by kjin »

I thought there was a database error from what Matt Cramer said a while back... There was a lot of work I did and posted based on the original analog circuit back in 2009 that all got deleted also. I think everyone's contribution to this thread is inspiring and informative, being an electronics tinkerer myself.
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