Knock control - load vs RPM table found

Reply Subscribe

Thread Tools

Search this Thread

Nov 27, 2008 | 03:46 PM

#106

l2r99gst

Evolved Member

iTrader: (2)

Joined: Mar 2004

Posts: 3,499

Likes: 4

From: CA

Quote:

Originally Posted by Phenixfyah

so what do we do for 96940011

Code:

<table name="Knock Load" category="Knock Control" address="38f2" type="2D" level="2" scaling="Load8">
		<table name="X" address="594e" type="X Axis" elements="10" scaling="RPM"/>
	</table>

<table name="Knock Multiplier - Low RPM" category="Knock Control" address="137a" type="1D" level="1" scaling="uint16"/>

	<table name="Knock Multiplier - Mid RPM" category="Knock Control" address="20b0" type="1D" level="1" scaling="uint16"/>

	<table name="Knock Multiplier - High RPM" category="Knock Control" address="1de4" type="1D" level="1" scaling="uint16"/>

	<table name="Knock Adder - Single Gain" category="Knock Control" address="1380" type="1D" level="1" scaling="uint16"/>

	<table name="Knock Adder - Triple Gain" category="Knock Control" address="137c" type="1D" level="1" scaling="uint16"/>

Nov 27, 2008 | 03:47 PM

#107

l2r99gst

Evolved Member

iTrader: (2)

Joined: Mar 2004

Posts: 3,499

Likes: 4

From: CA

Quote:

Originally Posted by jcsbanks

94170008:

Adders are two single values:
177c = 7 (triple gain)
1780 = 2 (single gain)

Multipliers are three values:
21DE = 20
24AA = 18
177A = 13

ROM 96530006 are the same address, as far as I can tell (maybe John can verify).

The knock load table is at:
421A (6576 RPM axis)

Or, to make it easy, this is added to ECUFlash:

Code:

<table name="Knock Load" category="Knock Control" address="421a" type="2D" 	level="2" scaling="Load8">
		<table name="X" address="6576" type="X Axis" elements="10" 		scaling="RPM"/>
	</table>

	<table name="Knock Multiplier - Low RPM" category="Knock Control" 	address="177a" type="1D" level="1" scaling="uint16"/>

	<table name="Knock Multiplier - Mid RPM" category="Knock Control" 	address="24aa" type="1D" level="1" scaling="uint16"/>

	<table name="Knock Multiplier - High RPM" category="Knock Control" 	address="21de" type="1D" level="1" scaling="uint16"/>

	<table name="Knock Adder - Single Gain" category="Knock Control" 	address="1780" type="1D" level="1" scaling="uint16"/>

	<table name="Knock Adder - Triple Gain" category="Knock Control" 	address="177c" type="1D" level="1" scaling="uint16"/>

Eric

Last edited by l2r99gst; Nov 27, 2008 at 03:54 PM.

Nov 27, 2008 | 04:44 PM

#108

phenem

Evolved Member

iTrader: (39)

Joined: Jul 2005

Posts: 811

Likes: 4

From: Central PA

Can I assume 94170015 is the same as 94170008?

People still using 08 need to upgrade to 15!

~Zach

Nov 27, 2008 | 05:43 PM

#109

lan_evo_mr9

Evolved Member

iTrader: (10)

Joined: Feb 2006

Posts: 1,097

Likes: 2

From: MD

88590015?

Nov 27, 2008 | 08:13 PM

#110

jid2

Evolved Member

iTrader: (62)

Joined: Feb 2004

Posts: 3,336

Likes: 6

From: Redmond - Lake Tapps ,WA

The maps in post #51 for multipliers and adders were 1X14 and dependant on RPM, the code above creates simple 1 cell maps for the multiplier and adders. Is that correct? No RPM range of adjustment for the EVO 8 in the same way the 9 works?

So we just kinda guess at what the low, mid, and high RPM transitions are for the Multiplers etc. I guess it's similar, I think I understand having just explained it to myself typing.

Last edited by jid2; Nov 27, 2008 at 08:21 PM.

Nov 27, 2008 | 10:08 PM

#111

fryedchikin

Evolving Member

Joined: Mar 2006

Posts: 228

Likes: 0

Quote:

Originally Posted by lan_evo_mr9

88590015?

See post #99

Nov 27, 2008 | 10:54 PM

#112

KevOVIII

Evolving Member

iTrader: (10)

Joined: Aug 2005

Posts: 246

Likes: 0

From: San Francisco, CA

Quote:

Originally Posted by l2r99gst

Or, to make it easy, this is added to ECUFlash:

Code:

<table name="Knock Load" category="Knock Control" address="421a" type="2D" 	level="2" scaling="Load8">
		<table name="X" address="6576" type="X Axis" elements="10" 		scaling="RPM"/>
	</table>

	<table name="Knock Multiplier - Low RPM" category="Knock Control" 	address="177a" type="1D" level="1" scaling="uint16"/>

	<table name="Knock Multiplier - Mid RPM" category="Knock Control" 	address="24aa" type="1D" level="1" scaling="uint16"/>

	<table name="Knock Multiplier - High RPM" category="Knock Control" 	address="21de" type="1D" level="1" scaling="uint16"/>

	<table name="Knock Adder - Single Gain" category="Knock Control" 	address="1780" type="1D" level="1" scaling="uint16"/>

	<table name="Knock Adder - Triple Gain" category="Knock Control" 	address="177c" type="1D" level="1" scaling="uint16"/>

Eric

The XML you provided gives this... is it correct? It looks different than what jcbanks attached.

Attached Thumbnails

Knock control - load vs RPM table found-knock_control.gif

Nov 28, 2008 | 12:23 AM

#113

jcsbanks

Thread Starter

Evolved Member

Joined: May 2006

Posts: 2,399

Likes: 6

From: UK

The Evo 8 uses one 2d table for load like the 9.

For the Evo 8, the 13,18,20 single values replace the multiplier table on the 9.

Also on the Evo 8, there are just two adders - 2 and 7 rather than 2 tables on the9.

Nov 28, 2008 | 01:06 AM

#114

KevOVIII

Evolving Member

iTrader: (10)

Joined: Aug 2005

Posts: 246

Likes: 0

From: San Francisco, CA

Quote:

Originally Posted by jcsbanks

So how do we know which values to use at certain RPMs in the formula you provided? You mentioned low, mid, and high but where are the switch-over points?

Thanks for all the work you've done.

Nov 28, 2008 | 01:37 AM

#115

jcsbanks

Thread Starter

Evolved Member

Joined: May 2006

Posts: 2,399

Likes: 6

From: UK

We don't unless someone disassembles the flag that controls it. I think it is reasonably to assume for now that it matches the curve for the 9 as the values are the same.

Nov 28, 2008 | 01:58 AM

#116

jcsbanks

Thread Starter

Evolved Member

Joined: May 2006

Posts: 2,399

Likes: 6

From: UK

Relevant patents - just read the abstracts, but these seem relevant to how the system works:

http://www.patents.com/Knocking-cont...5190011/en-US/

http://www.patents.com/Knock-suppres...5205258/en-US/

http://www.patents.com/Knocking-dete...5419180/en-US/

Nov 28, 2008 | 05:37 AM

#117

lan_evo_mr9

Evolved Member

iTrader: (10)

Joined: Feb 2006

Posts: 1,097

Likes: 2

From: MD

Does this look correct for 88590015?
<table name="Knock Load" category="Knock Control" address="3cf6" type="2D" level="2" scaling="Load8">
<table name="X" address="6b7a" type="X Axis" elements="10" scaling="RPM"/>
</table>
<table name="Knock Multiplier - Low RPM" category="Knock Control" address="669e" type="1D" level="1" scaling="uint16"/>
<table name="Knock Adder - Single Gain" category="Knock Control" address="66c6" type="1D" level="1" scaling="uint16"/>
<table name="Knock Adder - Triple Gain" category="Knock Control" address="66b2" type="1D" level="1" scaling="uint16"/>

Nov 28, 2008 | 05:42 AM

#118

lan_evo_mr9

Evolved Member

iTrader: (10)

Joined: Feb 2006

Posts: 1,097

Likes: 2

From: MD

double post- sorry

Nov 28, 2008 | 05:54 AM

#119

dan l

Account Disabled

iTrader: (3)

Joined: Apr 2006

Posts: 1,029

Likes: 0

From: USA

Quote:

Originally Posted by jcsbanks

Thanks for posting this. I like to know the "how's and whys" before I go editing code. This will really help the people who take the time to read it.

Since you mentioned the adaptive learning of the knock system, I have been studying my knock sums after a reflash which clears the ecu on a 9. The very first pull it knocks significantly (6 counts). Every pull theirafter it becomes less till I get 1-2 counts or none at all after a couple pulls or maybe just a long period of driving. Of course the logging isn't fast enough to pick up the spikes in knock sensor noise, but I can still pattern trends in my head with the info given above. I'm really glad I'm not only learning how to deal with this system, but how to manipulate it and retain the safety that it is intended to provide.

Nov 28, 2008 | 08:40 AM

#120

jid2

Evolved Member

iTrader: (62)

Joined: Feb 2004

Posts: 3,336

Likes: 6

From: Redmond - Lake Tapps ,WA

The patent search tool in google will give you the actual paperwork and drawings - I use it at work all the time.

http://www.google.com/patents?id=K5w...BAJ&dq=5419180

jcsbanks description is pretty much right on.

Reply Share

First
Prev
8 / 24
Next
Last