I believe that your description of how the ECM responds to O2 sensor voltage is backwards (an increase in O2 voltage causes ECM to increase fuel injected). You state that the O2 signal increases voltage when there is a larger O2 difference between the atmosphere and exhaust. When the exhaust has less O2 the sensor increases its output voltage. An increase in O2 voltage means less excess O2 is available for combustion, this should cause the ECM to reduce the amount of fuel, NOT increase it. If there is more oxygen in the exhaust gas the O2 sensor voltage will drop. The excess O2 is available for combustion of additional so the ECM would then call for more fuel to be injected. So there is an inverse relationship between O2 sensor voltage and amount of fuel injected. i.e. An increase in O2 signal voltage causes a decrease in fuel injected.
The spacers have nothing to do with o2 concentration either, it's for temperature. Excessive temperature reduces the voltage output so making it seem as though the mixture is leaner than what it actually is. So you got that all wrong too,
Gear Quest okay perfect man. I work with audio a lot so if you need any help send me an email UnstableEntropy@gmail.com you’ll be huge soon with this quality of videos.
EPA estimates?... and other improvements/advancements not just the combustion engine is a pretty Blank Statement! Basically just Government Propaganda!
O2 sensors only respond to o2 concentration when on the lean side of lambda 1, The highest voltage it can make as a nernst cell is about 300mV. That corresponds to the half cell voltage for oxygen ions. When richer than lambda 1 the sensor responds to the concentration of HC and CO as well as H2 while the concentration of o2 is effectively zero That's the full cell voltage and explains the sudden jump in voltage AT lambda 1. Your explanation is completely wrong of course. The difference before and after the cat converter is because the cat converter reduces the HC and CO concentration by oxidising it with the NOx which it reduces to O2 and N2.Nothing to do with o2 levels
This was an excellent video 💯, I wish I'd found it soon and look forward to going through your others
I believe that your description of how the ECM responds to O2 sensor voltage is backwards (an increase in O2 voltage causes ECM to increase fuel injected). You state that the O2 signal increases voltage when there is a larger O2 difference between the atmosphere and exhaust. When the exhaust has less O2 the sensor increases its output voltage. An increase in O2 voltage means less excess O2 is available for combustion, this should cause the ECM to reduce the amount of fuel, NOT increase it. If there is more oxygen in the exhaust gas the O2 sensor voltage will drop. The excess O2 is available for combustion of additional so the ECM would then call for more fuel to be injected. So there is an inverse relationship between O2 sensor voltage and amount of fuel injected. i.e. An increase in O2 signal voltage causes a decrease in fuel injected.
I agree. Really excellent video but the rich/lean response is definitely reversed.
Agreed.
Nice video I was really wondering how the spacer worked.
Nice vid didnt know how o2 actually works. but the ecu will do the opposite of the o2 so o2 reads rich ecu leans mixture and vice versa
Yes, I noticed that too, starting at 5:02 to 5:35
Thanks for the feedback! However, I do mention the inverse relationship of the O2 sensor and ECU. Thanks 🙏🏼
The spacers have nothing to do with o2 concentration either, it's for temperature. Excessive temperature reduces the voltage output so making it seem as though the mixture is leaner than what it actually is. So you got that all wrong too,
Excellent video
very educative. Thank you regards
Like the video, and your voice. Good job man but definitely get some type of pop filter. Metal mesh ones are often better if they are duel layered.
Thanks for the support and feedback 🙏🏼 I’m looking into an upgrade filter for sure!
Gear Quest okay perfect man. I work with audio a lot so if you need any help send me an email UnstableEntropy@gmail.com you’ll be huge soon with this quality of videos.
Nice video, great explanation on oxygen sensors!
Thanks for support 🙏🏼
Amazing content
Let us talk about where the electrons are borrowed from to make electron pressure to the ECM. oxygen or hydrogen??? Albert Harvey Rotary Engines
Great video, thank you
why does the thing need a ground, the signal is being sent to the ecu, not from it.
Great video! Loved it !
What happens if I run more power but keep stock cats? (turbo car) asking for a friend.
I've wondered about that, but hadn't just stopped to do some searching. Now I'm like: f'k spacers.
😂 Spacers have there place especially if your running cat-less. 🤫 Don’t let the EPA know I told you that.
Love it
EPA estimates?... and other improvements/advancements not just the combustion engine is a pretty Blank Statement! Basically just Government Propaganda!
O2 sensors only respond to o2 concentration when on the lean side of lambda 1, The highest voltage it can make as a nernst cell is about 300mV. That corresponds to the half cell voltage for oxygen ions. When richer than lambda 1 the sensor responds to the concentration of HC and CO as well as H2 while the concentration of o2 is effectively zero That's the full cell voltage and explains the sudden jump in voltage AT lambda 1. Your explanation is completely wrong of course. The difference before and after the cat converter is because the cat converter reduces the HC and CO concentration by oxidising it with the NOx which it reduces to O2 and N2.Nothing to do with o2 levels
Anyone who's studied chemistry at university level should be fully aware of what's going on, the topic being redox reactions.