First look at the ECM Bench I have been working on

Complete new circuit board design......

More info to follow....

 

thats pretty slick. does it have swapable resistors to accomodate multiple injector layouts like p/h and saturated ??

 

First off... why when that is dependant on the ECM, not the test bench.

All the ECM outputs are to a LED. However if you wanted to add a extra harness off the ECM you still could "fire" injectors.

 

Looks good. You planning on selling any of them?

 

Why would you want to even do that?.
Using resistors is pointless.

If you want to learn anything about injectors and how they behave, you have to use injectors.

And then the would wire into the ecm, not the test bench.

In case you don't know, a test bench just generates the signals you feed into an ecm. Then you monitor the ecm to see what it's doing.

 

It's possible I may sell the bare boards with documantation similar to how the diy WB is set up. I doupt I will sell completed units as stuffing the boards with parts takes about an hour and a half.. and labor isn't cheap.


I am currently building a harness and testing out the design. Once it checks out, and any revisions that may be needed are implemented, then I will make the boards available.

Board cost will depend on demand, parts for the board run about 60/70 bucks.

 

i understand what the bench is for. i was just wondering how he was simulating load etc. its still slick. if you make thesed avaiable ill definately be interested in one.

as for running actual injectors does it really matter ?? if you have a good quality scope i dont really think so.

 

What do you mean by simulating load? I don't see why a test bench wouldn't. Infact I see it as one major advantage of using a test bench.

 

How can you even **think so** when you haven't even used one?.

Once you actually use one, you'll begin to get a grasp at what a powerful tool it is, and what it can show you that a scope can't.

The all too common problem is people *thinking so* without having any clues about what they're thinking about.

 

Amen to that, thou Doc says he's willing to cut you a break, IF you tell him what that schematic is that the boards are laying on.

 

probably becuase i have acess to stuff like a simutech. and a nice qulity lab scope and emisions euipment.

im not trying to be an ***. but how is looking at a blinking led going to tell me about current cunsumption and fet operating stability as well and injector current saturation and dissapation where as i can view it with a scope ?? i can see that the ecm bench is a useful tool. but i think its not the end all be all and can be worked around.

this is the thing im most sick of. HTF do you know what im thinking about ?? i was asking about simulating load.

4 choke coils, 4 1.5 ohms resistors and 4 leds would have been a great way to simulate loads.

i was passing a compliment and asking a question. thats a nice setup he's made there. i was asking about load simulation. if you cant run it with real world loads all collected data is bascially useless.

granted seeing if code is functional is one thing. but seeing how a injector behave under a dynmaic load is not something a test bench will show you. it certianly wont show you hw they behave under a pure or close to pure dc mode either. itll help you get to the point where you can test dynamic load but its not gonna answer your specific questions about current rise time and injector current flyback.

im not trying to be an *** but you keep assuming your way is the only way and its pretty annoying.

as for saturn5 nice job man. looks good.

 

is the DB9 serial connector on the board for the ALDL output?

 

yes...

 

Nice work SATURN5, I'm very interested to see how this turns out..

Cheers,

 

<sigh>
Using chokes are just slightly better then guessing. the only thing that duplicates an injector is an injector.
It's the assumption of your's that has no background in reality that's wasting time. Run a bench and see what happens.

Build a bench, then comment about it, and then comment as far as what it can and can't do.

No choke is going to let you see it going static, like an injector does.

I post about results, and if I'm venturing a guess, I state it as so, you on the other hand state as fact items your just guessing about.

No where did I suggest LEDs could replace injectors, for determinging anything other then the injector driver is working.