Design an ECU project?

Jon,
I've looked at these. To handle my 24 injectors I would need at least 2 of them then need to buy a TC sytem somewhere else and try to get everything playing nice together. It's a difficult path, but possible.

What I've decided to do is use motec stuff. The best option is to I wait for the new motec M190 to be released which should happen in about a year and will handle my 24 injectors in 1 ecu.....I'm trying to get on the beta test list but so far haven't had much luck.

The other option is to canbus link 2 M800s so they will share sensors and once set up I can do most of the tuning as if it were just 1 ecu. It's a little tricky to set up, but the newer software versions do allow it and it has been done and tested.

 

I didn’t realize there was a more expensive solution than motec….but it looks like you found one for me that would run about double and take me from 1 or maybe 2 boxes up to 4. I’m sure it’s good stuff, but it’s a lot of stuff, a lot of set up and a lot of money.

I will most likely end up with the coming M190 motec and I’m trying very hard to get time worked out so I can be on their development project list and get one for free

 

I will have 24 injectors, so 2 ecus and then 2 TC boxes is what I was thinking vs 1 motec M190.

 

It seems like it would be a bad idea to only have some of the cylinders connected to the TC and motec only charges $375 for the option last I checked and it's the same option I'd need for the hi/low injector control anyway so the TC is free.

Have you looked at the motec software recently? 3 years ago the only option was ignition retard, but now they have fuel cut, ignition cut, or a comination of either and retard. It seems pretty good but I haven't tried running it.

 

You know.....as much as I should I haven't forgotten this custom ecu thing just yet.

My current thinking is the DIYEFI open source project has some synergy and might make the custom thing make sense.

I started kicking it around a bit over there:

http://www.diyefi.org/forum/viewtopic.php?f=41&t=734

I need to learn C++ I think.

 

Here is what I'm thinking so far:
I've got a hardware designer full in and starting
I've got a guy who has a working open sorce user interface in to make whatever changes are required to make it work on this ecu

Firmware people or I need to learn how to do it.


General requirements:
1) Easy setup. This should be a 1 board solution if possible, with commercially produced boards available and no extra anything required but DIY board construction should be possible.
2) Finished product appearance when installed.
3) The smallest foot print possible…should compare to commercial option (I’ll get a number for this)
4) And Oooooh it needs to be fast with way more input/ouput capability than anyone will ever actually find a need for (what should this spec actually say???....something we can put a number to)
5) Water tight case
6) Surface mount components preferred
7) CPC or connector(s)

Software requirements:
8) Compatible with FreeEMS tuner
9) Traction and launch control possible
10) 32x32 tuning maps, with user defined points
11) At least 8x8 trim maps on each fuel/ignition output…16x16 would be better

Output requirements
12) 24 fuel High impedance injector driver
13) 12 low high impedance injector drivers and
14) 12 ignition outputs capable of driving coils directly (this may want a separate board, but must be in the main case.
15) IAC Stepper motor output
16) At least 8 digital outputs
17) At least 8 PWM out puts

Input requirements
18) Standard inputs for TSP, MAP, coolant temp air temp
19) 2 Hall and 2 reluctor triggers
20) At least 4 O2 sensor inputs
21) 12 inputs for ETG would be nice
22) 4 Hall inputs for wheel speed
23) At least 8 digital inputs
24) At least 8 analog inputs

 

We are back to the big question,

Who knows how to right code and can help? This is an open source/open design project so you will be helping SAVE THE WORLD from poor performing or over prices ECUs.

I've got a line on a couple guys that may be interest that I will follow up with but the more the better.

The second question is what changes are needed on the Design inputs list? This is intended as God's gift to the performance car world, the ECU with the power to meet all needs. So what's wrong or missing?

 

I fully intend to keep my hands off the code and more importantly the ECU away from the thottle and braking systems making anyhting like situation you describe impossible. The only think at risk will be the engine itself....which is still not somehting I want to see damaged, but it is a money issue, not a safety issue.

I notice from your post you are most likely exactly the type of person I need and I'm guessing you have friends. Are you in? Can you get your friends in?

 

Sean,
You were on my "people who need a PM list figuring you must at least know someone if not yourself who could help.
I can't answer your questions buy lets get you registered on the DIYEFI forum and get your questons answered with propper answers. It took them a long time to process my registration...they turned off the auto thing to try and stop spambots.

Go here
http://diyefi.org/

and try to register and I will alert them that they need to make this happen right now.

Here's the directions

If you are looking to sign up, please email me at fred (dot) cooke (at) gmail (dot) com and include your desired username and temporary password. I'll try to get it done ASAP and notify you when the account is ready. Thank you for your patience, this was necessary given the volume of spammers at the moment.

 

Thank you Sir, you will not regret youyr decision...ok maybe you will a little, but you are helping save the wrold, it's worth it!


Now, who else is in? It's SAVING THE WORLD we are talking about!

 

And I posted asking them to look for the email.


Is there anything you see missing or wrong with the design inputs? I want to lock this down in the next couple days so the hardware guy can run, he's chomping at the bit to build something way cool.

 

What I'm asking is realy if there is somehting way cool the ecu should be able to do that you think I left off? The hardware guy will put the drivers on the board I ask for....but I have to ask and differnet thing want different drivers

 

There are now 3 programmers in.

Come on guys, you don't want to be left out, it's time to jump in!

 

Guys, it time to work so if you've signed up or ar thinking about it or willing to give advise you are needed here:

http://www.diyefi.org/forum/viewtopic.php?f=10&t=736&p=8550

Here is what I think is the (pretty) complete design inputs list:

General requirements:
1) Easy setup. This should be a 1 board solution if possible, with commercially produced boards available and no extra anything required but DIY board construction should be possible.
2) Finished product appearance when installed.
3) The smallest foot print possible…should compare to commercial option , under 160mm x 120mmx60mm preferred
4) Automotive grade components
5) Water tight case
6) Surface mount components preferred
7) CPC or connector(s)
8) On board memory for logging….say enough for 1 minute.

Software requirements:
9) Compatible with FreeEMS tuner
10) Traction and launch control
11) 32x32 tuning maps, user defined points prefered
12) 8x8 trim maps on each fuel/ignition output
13) 4D Fuel and ignition tables (RPM, TPS, MAP)
14) Closed loop O2 or Lambda control
15) Idle speed control
16) Boost control
17) Nitrous Control
18) Data Logging
19) Sensor diagnostic limits
20) Hi/Low and staged injection

Output requirements
21) 12 fuel High impedance injector drivers, may also be used as auxiliary outputs
22) 12 low impedance injector drivers (should also drive high impedance injectors)
23) 12 ignition outputs capable of driving coils directly (this may want a separate board, but must be in the main case.
24) At least 8 digital outputs
25) At least 8 PWM/variable voltage out puts (tach, IAC, ect)
26) 5V (sensors)
27) 8V (sensors)
28) 12V

Input requirements
29) 2 reluctor (triggers)
30) 8 digital inputs, 0/1v (hall trigger, wheel speed, ect)
31) At least 4 O2 sensor inputs, should accept narrow or wide band
32) 12 Thermocouple inputs (EGT temp, ect)
33) 8 digital inputs 0/12V (gear selection, nitrous switch, ect)
34) 8 analog inputs (TPS, MAP, ect)
35) 4 Temp inputs (air temp, coolant temp, ect)
36) 12V DC (approx 8V-16V)
37) 2 knock detectors

Communication Requirements
38) CAN
39) RS232