Search found 32 matches

by sepp2gl
Sat Apr 30, 2022 10:13 am
Forum: Dev: Software
Topic: Software knock processing
Replies: 54
Views: 17905

Re: Software knock processing

@Simon: please find some comments in the attached modified presentation. There are mainly three things, that I disagree with: 1. Transient knock can be very strong and thus need to be avoided. Transient knock cannot be handled by sensor-based knock detection, because it simply is too slow, as the re...
by sepp2gl
Sat Apr 30, 2022 9:07 am
Forum: Dev: Hardware
Topic: Ion Sense
Replies: 191
Views: 107209

Re: Ion Sense

@JohnP: very interesting paper from Visteon. The findings were mostly well-known state-of-technology. If you only look at the pure detection of knock-occurrence, there is a lot arguments for ion-sensing. There are three alternative solutions know: vibration-based (knock sensor), ion-current-based, c...
by sepp2gl
Mon Mar 28, 2022 10:47 am
Forum: Dev: Software
Topic: Software knock processing
Replies: 54
Views: 17905

Re: Software knock processing

Thanks for clarification.
Looks like you (the "resEFI knock-team") are still at the very beginning of knock-detection,
and you want to find your own way.
Anyway: if you need advice for a proven solution, contact me...
by sepp2gl
Sun Mar 27, 2022 9:37 am
Forum: Dev: Software
Topic: Software knock processing
Replies: 54
Views: 17905

Re: Software knock processing

@Simon: you may be right; I know quite a bit about knock-detection and control, but so far I haven't found the information about the rusEFI knock-detection concept documented anywhere in this forum. So I may have misinterpreted the expression "baseline". Nevertheless: where can I find my b...
by sepp2gl
Sat Mar 26, 2022 11:28 pm
Forum: Dev: Software
Topic: Software knock processing
Replies: 54
Views: 17905

Re: Software knock processing

@simon: what makes you think, that there is ONE baseline? The noise-level, depends on a variety of parameters (e.g. engine speed&load, cylinder-no., sensor placement, engine aging, valve timing and valve lash, etc.). Measuring a baseline during deceleration does not make any sense, as there will...
by sepp2gl
Mon Feb 07, 2022 10:10 am
Forum: Dev: Hardware
Topic: Ion Sense
Replies: 191
Views: 107209

Re: Ion Sense

@OrchardPerformance: Looking to the diagram, the black trace is the typical shape of an ion-sense native signal, with the blue trace being combustion pressure as reference. It is important to know, that you don't get this perfect shape under all conditions of engine operation: mid/high load operatio...
by sepp2gl
Mon Jan 24, 2022 9:15 am
Forum: Dev: Hardware
Topic: cheap cylinder pressure sensor option - smart diesel glow plug with pressure sensor
Replies: 76
Views: 41672

Re: cheap cylinder pressure sensor option - smart diesel glow plug with pressure sensor

Hmmm...
I still don't understand the rational behind this doing.
Has a Harley engine got two spark-plugs, so he can replace one?
If he is doing cranking- (motored-)Test without combustion only, what is it good for to know TDC in motored operation?
by sepp2gl
Sun Jan 23, 2022 8:33 pm
Forum: Dev: Hardware
Topic: cheap cylinder pressure sensor option - smart diesel glow plug with pressure sensor
Replies: 76
Views: 41672

Re: cheap cylinder pressure sensor option - smart diesel glow plug with pressure sensor

Its not that there is not access, its that there is no access without pulling the side cover and fitting a degree wheel which is the standard approach but was deemed to much bother iirc. The older ones had a plug in the case to check timing left over from the points days but on the new designs that...
by sepp2gl
Sun Jan 23, 2022 7:40 pm
Forum: Dev: Hardware
Topic: cheap cylinder pressure sensor option - smart diesel glow plug with pressure sensor
Replies: 76
Views: 41672

Re: cheap cylinder pressure sensor option - smart diesel glow plug with pressure sensor

That's why, I think this forum (and most others) needs an engine analysis chapter and a system design chapter. The conditions of a specific engine need to be clarified in a separate activity and not in a software or (ECU)hardware chapter, and within it should be documented in a kind of engine-datash...
by sepp2gl
Tue Jan 18, 2022 7:52 pm
Forum: Dev: Hardware
Topic: microRusEFI
Replies: 386
Views: 245373

Re: microRusEFI

Hi guys,
just looking through MRE. Looks really nice for 4-cyl applications.
You decided to use TLE8888 for it.
Did you find a reliable distributor for the procurement of this chip?
I only found Digikey, who seem to be willing to sell small numbers of it.
Is there any other second source?
kr, sepp2gl
by sepp2gl
Tue Jan 18, 2022 9:30 am
Forum: Dev: Hardware
Topic: Ion Sense
Replies: 191
Views: 107209

Re: Ion Sense

@mck1117:
...any reply? :?: :?: :?:
What do you mean by "...looks as expected"?
What was your expectation?
kr, sepp2gl
by sepp2gl
Tue Jan 18, 2022 8:40 am
Forum: Dev: Hardware
Topic: cheap cylinder pressure sensor option - smart diesel glow plug with pressure sensor
Replies: 76
Views: 41672

Re: cheap cylinder pressure sensor option - smart diesel glow plug with pressure sensor

@nmstec:
"for locating TDC"?
Why would you want to apply such an invasive technology just for locating TDC?
by sepp2gl
Tue Jan 18, 2022 8:37 am
Forum: Dev: Hardware
Topic: cheap cylinder pressure sensor option - smart diesel glow plug with pressure sensor
Replies: 76
Views: 41672

Re: cheap cylinder pressure sensor option - smart diesel glow plug with pressure sensor

Well... ...the world is definitely not separated in ECU-software and ECU-hardware. I like to see it Top-Down rather than Bottom-up. Engine control is multi-domain. It starts with understanding engine-functionality, combustion-system, thermodynamics. It continues with the system perspective of engine...
by sepp2gl
Mon Jan 17, 2022 8:58 pm
Forum: Dev: Hardware
Topic: cheap cylinder pressure sensor option - smart diesel glow plug with pressure sensor
Replies: 76
Views: 41672

Re: cheap cylinder pressure sensor option - smart diesel glow plug with pressure sensor

...did anybody continue applying a diesel pressure sensor to a gasoline engine?
Or is this a dead thread?
by sepp2gl
Fri Jan 07, 2022 6:42 pm
Forum: You and your build
Topic: Introduction
Replies: 16
Views: 3497

Re: Introduction

Nope...You are perfectly right. I propose to move this exchange into ./User Support/You and your Build/"Multi-Throttle Arragements" as new tread. But... ...I also propose to make "Introduction" an own chapter of ./User Support. This is the entry door for each and every NewBe into...
by sepp2gl
Fri Jan 07, 2022 5:48 pm
Forum: You and your build
Topic: Introduction
Replies: 16
Views: 3497

Re: Introduction

Ciao!
Like always the truth is somewhere in-between.

What is the intent for your 12-channel pressure aquisition? Why are you doing it?

kr, sepp2gl
by sepp2gl
Fri Jan 07, 2022 9:14 am
Forum: You and your build
Topic: Introduction
Replies: 16
Views: 3497

Re: Introduction

Congrats!
"Is there life without a Ferrari? Yes, but it doesn't make any sense." :D
I guess you gave your life quite some sense.

Did you tell your left cylinder-bank to stop smoking?
What was the reason? Cylinder-head gasket?
by sepp2gl
Thu Jan 06, 2022 7:25 pm
Forum: You and your build
Topic: Introduction
Replies: 16
Views: 3497

Re: Introduction

ONLY 4? :lol: :lol: :lol:
Mine is looking like this:
by sepp2gl
Thu Jan 06, 2022 4:52 pm
Forum: You and your build
Topic: Introduction
Replies: 16
Views: 3497

Re: Introduction

...thx for clarification. I will do. Maybe I misunderstood AndreyB's question about my own DIYEFI project. I falsely related it to DiyEFI-forum of Fred Cooke (FreeEMS). Actually I intended to operate my Honda-motorcycle CB750K, a 4-cyl. 750ccm by a DIY-electronic. Purpose1: MAP-based ignition, synch...
by sepp2gl
Tue Jan 04, 2022 7:42 pm
Forum: Tuning Support: Making it Run
Topic: MAF vs Speed Density, why do we prefer which one?
Replies: 21
Views: 6476

Re: MAF vs Speed Density, why do we prefer which one?

Hi guys and happy new year! just looking through some of your discussion about speed-density ( SPD ) versus mass-airflow ( MAF ). For the scope of stoichometric combustion (lambda=1) both have some pros and cons. MAF pros: - direct and precise massflow into the engine (at least for steady-state engi...
by sepp2gl
Mon Jan 03, 2022 8:20 pm
Forum: You and your build
Topic: Introduction
Replies: 16
Views: 3497

Re: Introduction

...not really.
I didn't follow DiyEFI frequently during the last 10 years...
What is a "Slack Channel"?
Why should I join there?
by sepp2gl
Mon Jan 03, 2022 7:17 pm
Forum: Misc
Topic: rusEfi presentation
Replies: 3
Views: 5385

Re: rusEfi presentation

@AndreyB: I think, some statements from "About rusEFI" should be part of this presentation. Especially the scoping "...a GPL open-source engine control unit for gasoline port-injected internal combustion engines. This project involves embedded hardware, software, and engines. ... ...T...
by sepp2gl
Mon Jan 03, 2022 9:38 am
Forum: Dev: Hardware
Topic: Ion Sense
Replies: 191
Views: 107209

Re: Ion Sense

Can you tell, what functionality is covered by IS on Skyactive-G?
Is it more basic misfire & knock detection?
Or does Mazda use advanced functions?
by sepp2gl
Mon Jan 03, 2022 9:31 am
Forum: Dev: Software
Topic: Software knock processing
Replies: 54
Views: 17905

Re: Software knock processing

So far I do not fully understand your knock detection algorithm yet.
- How is knock discriminated from noise level after filtering and windowing?
- What is done, after knock occurrence has been detected?
- How is your knock-control strategy and algorithm?

kr, sepp2gl
by sepp2gl
Mon Jan 03, 2022 9:20 am
Forum: Dev: Hardware
Topic: VR + knock module
Replies: 40
Views: 27277

Re: VR + knock module

@mck1117: Where are those findings posted? Detected real knock that was enough to push out my head gasket, but light enough to not pit the cylinder head. See: https://rusefi.com/forum/viewtopic.php?t=1469 What do you mean by that statement? Your detection was capable detecting knock, that damaged yo...
by sepp2gl
Sun Jan 02, 2022 7:23 pm
Forum: Dev: Hardware
Topic: VR + knock module
Replies: 40
Views: 27277

Re: [help needed] VR + knock module

Hi guys, looking through this thread, this one seems to be quite controversal. And I would like to learn about the experience, that you made with the different approaches. [edit] Most knock sensor chips are reasonably blah. The bandpass filters are poor and the energy detection circuits are limited....
by sepp2gl
Sun Jan 02, 2022 5:58 pm
Forum: Dev: Hardware
Topic: cheap cylinder pressure sensor option - smart diesel glow plug with pressure sensor
Replies: 76
Views: 41672

Re: cheap cylinder pressure sensor option - smart diesel glow plug with pressure sensor

Hi Guys, besides Beru, Sensata and Hidria also Optrand would be a good choice for such a sensor. A couple of years ago also Bosch and Continental worked on in-cylinder pressure sensors both for diesel engines with integrated glow-plugs and "stand-alone" for gasoline engines. But I don't kn...
by sepp2gl
Sun Jan 02, 2022 3:38 pm
Forum: Dev: Hardware
Topic: Ion Sense
Replies: 191
Views: 107209

Re: Ion Sense

...coming back to Mazda's "Skyactiv engines"... Skyactiv is a brand-name, that stand for a couple of different types of engines with various technologies. - Skyactiv-G is a gasoline engine with cylinder-deactivation, a very high compression-ration of 14:1 and for that they need to apply a ...
by sepp2gl
Sat Jan 01, 2022 9:21 pm
Forum: Dev: Hardware
Topic: Ion Sense
Replies: 191
Views: 107209

Re: Ion Sense

@mck1117: As far we I know, Mazda is doing both of these on their Skyactiv engines. I will double-check Mazda's Skyactiv system, why they are using IS and which specific functions are inplemented. We're most interested in #1. This isn't too big a problem, since there isn't much overlap between the s...