Is there any way to have the Output from the EGR be converted from a RPM switch based type to an analog voltage instead?

I'm thinking no--But I figure I could post it here and get a more firm no than just my guess.

 

No, the output is a transistor controlled by a digital signal, so it cannot output analog voltages.

What did you want to do with it?

 

Simulate the WB voltages to a gauge allowing me to use the wideband to simulate the narrow band and datalog.

Guess I'll just do it the "normal" way and keep the NB and just weld the bung in down stream.

 

Huh?

You dont have a wideband that has a WB and NB output?

 

Sorry that was really confusing. I wasn't totally coherent when I posted that.

I picked up an LC1 with just the regular digital gauge. It has two outputs. Both outputs can be altered to display whatever voltage you wish to see related to the Oxygen content. Out of the box one wire is the Wideband signal the other is the Narrowband signal.

What I was hoping to have would be an instant view of the AFR via gauge, have the ability to Log the wideband signal, and then simulate the narrow band.

There were only 3 ways I could think of using what I currently have to work.

1) hook up the wideband to the logging and then hook up the narrowband without using a gauge.

2) Logging wideband alter the narrow band to be a wideband signal and hook it up to the gauge leaving the stock narrowband in place.

3) wideband signal to an omp-amp circuit and run the narrow to the stock location. Then one lead from the omp-amp to the datalog and one to the gauge.

If it were possible I'd have liked to hook up the wideband via the log port and the stock narrowband then have the output simulate the wideband signal to the gauge.

 

Connect the WB output the the WB logging input and the gauge, then the NB output to the ECU.

Also keep in mind the stock location of the o2 sensor is not ideal for a WB sensor. It is too close to the block and will kill the sensor. So youll need to put a bung in anyway.

 

Turbo2liter, I have a similar issue. I have one of those 0-1 volt A/F gauges for a narrowband. If I hook up one of the widband outputs to simulate the stock narrow band and configure the other wideband output to a 0-1volt range for the gauge, could I also log this 0-1 volt output in the rtek and then configure the rtek to convert this into A/F ratio? Would there be any disadvantage to reducing the range of the logged output from 0-5v to 0-1v?

 

If you mapped the WB to 0-1v then you would lose resolution on the logger side. The input sensitivity is fixed at about .02v.

If you had a range of 10-20 AFR scaled to 0-5V, you would have 256 steps at a resolution of about .04 AFR

If you scale the same AFR range to 0-1V, you only use 20% of the input sensitivity, you would get 51 steps at a resolution of .19 AFR....nearly .2 AFR. So for example, you would see 11.20, then the next step would be 11.40

The easy thing to do is make a voltage divider. Get a 4K resistor and a 1K resistor.. connect them in series.
This will divide the voltage down to 0-1v for your meter.

 

Okay, so you telling me to splice in the Both the Gauge and the Logging input to the Wideband (0-5v) output, and hook up the Narrow band output to the narrowband input?

Wouldn't this cause noise in the wideband signal? So neither the Logger nor the Gauge would be as accurate as they would be if hooked up to individual outputs?

 

If they were designed right, it should be OK.

 

Hmmm, this may be something to ponder over... Thanks for the info.

Just out of curiosity how do you know if a sensor is designed right or not?

 

you can use a multimeter to see if when you connect the gauge to the WB output already connected to the ECU, if the reading drops. The fact that the reading is usually changing constantly makes it difficult though..

 

Back from the deep.

Quote From Pocketlogger.com, "The EGR output has been converted to use as a general use RPM controlled switch. The active low output can be configured in the software to activate at any RPM. "

I'm curious about this EGR output? What can it be used for? Shift Light? Electronic Exhaust Cutout? Aux. Inj?

Has anyone used the EGR output? If so what for, and how is it wired? How well does it work?

How much juice does it have? (mV, mA or Volts and Amps)

Also I know there is the ARM/Alarm function in the RTEK software, maybe someday we could get it to output for Aux. Inj, or other boost, temp, rpm activated equipment.

Also, maybe an adjustable Rev. Limiter...

Just throwing these things out there...

 

I believe the current spec is in the manual.

 

Thanks...?
From the manual.

"Certain ECUs have the ability to utilize an output as an RPM controlled output. This could be used to control anything from a shift light to a nitrous system. Please see the chart in the beginning of Chapter 3 for information on whether your ECU supports this feature.

Some ECUs have the option to use an existing output as an RPM controlled output. Depending onthe ECU type and version, this may be the EGR output or the AWS output. On the Outputs Tab,there is a checkbox to enable the RPM control of the output. Check the checkbox to enable it anduse the slider to adjust the RPM threshold at which the output should be activated.

The ECU outputs are open-collector, active low outputs. This means that when the output is not activated, the output wire is not connected to anything. When the output is active, the output wire is grounded.

While the diagram above depicts a switch in the ECU for simplicity, the actual switching circuit
utilizes solid state components. These components have a much lower current limit than a switch or relay. If you must control a device that can draw more than 500ma of current, you must use a relay in between the ECU and the high current load.

The ECU can only sink about 500ma of current. You must make sure that the device you wish to control does not draw more than 500ma or damage to the ECU will result."

What is the max rpm for activation? 6000?

500mA. What can run at that amperage?

http://www.radioshack.com/product/in...LAID=107591591

I'll be trying this out soon... If I burn it out, will it affect the ecu engine operation?