Oxygen sensor - Wikipedia, the free encyclopedia
Automotive...|Diving...|Scientific...|See alsoAn oxygen sensor, or lambda sensor, is an electronic device that measures the proportion of oxygen (O2) in the gas or liquid being analyzed. It was developed by Robert Bosch GmbH during the late 1960s under supervision by Dr. Günter Bauman. The original sensing element... Oxygen sensor - Wikipedia - 60k - Cached.
when having a tuned engine the Lambda value is a great "health" indicator.
it shows how rich or lean the engine runs, during normal cruise it should be quite normal, but when hitting it hard it must always be slightly rich.
If you run lean (fuel system defect) during full load the exhaust temperatur will skyrocket and your piston/valves can melt away...
Thats way im also having exhaust temp probes installed:
and later the arduino will look up this this 2 Type K thermocouples.
after 1 week testing, the powersupply failed... :-[
it heats up to 75°C at 20°C ambient, in a car thats no good :-X
The "demo":
its a 33Ohm 5Wats resistor, simulating a little bit more load than only the 3 led´s
With a thermocouple measuring the temp of the heatsink.
and that with a quite big heatsink:
Problem is the 7805, it must kill to much power. So a DC/DC converter will take its place:
I'm thinking about using your idea in my car for a summer project. I'm american, unfortunately, I can read grade school german but the forums you linked are a little much for me. I appreciate you writing this in english, as I can tell you're german.
I want to do an in dash LCD, with lambda among other things. Hopefully, you will keep me updated on your progress. I will be installing this into a Subaru WRX STI.
Is there anyway you could translate your lambdaanzeige page for me?
i will keep this for shure updatet, just now im on business travel, but parts ar ordered and within the next week the first prototype should find its way into my car
im using a MCP3208 as ADW, so i have enough pins for some buttons...
besides the LCD its streaming all 8 ADW pins as csv over the serial interface, including a "milis" timestamp.
So it can be used for logging in combination with a notebook
i still need to get the RPM measurement running, not so easy as i thought... :-?
how exactly are you powering everything?
i can proboly tell your going to say car battery right?
well, heres a sugesston.
buy another car battery, use a resister to get it to 5 volts, and then, plug everything in ;D
Wow, excellent work! I hope you give more details of the car interface once you get done. I know it's hard to do a write up when you're elbow deep in a project.
Also, thanks for that snippet of the power circuit. I hope to have it together soon.