turbomotor
Mechanical
- Jan 20, 2005
- 127
We are making plans to set up an air cooled opposed 6 cylinder engine with digital electronic fuel control. As the target bmep is about 25 bar, the heat load on the engine exceeds the typical air cooling function, and we plan to use water injection to help cool the cylinder head and prevent detonation. (Some racers call the fluid ADI, but it does more than just prevent detonation.)
I am looking for advice from someone with experience using O2 sensor to help calibrate injector drive signal, and specifically the impact of water injection (upstream of intake valve) on the operation of the O2 sensor. Maximum water injection (at full power) is expected to be about 0.04 lbm water / lbm air.
Will this injection have an impact on the O2 sensor signal?
Once the fuel injectors are calibrated, we will switch the ADI from water to 50MW (50/50 water methanol (by weight)). But we will do the calibration work using just water, so that we do not introduce additional combustibles into the mix when considering O2 sensor feedback.
Thanks for your comments.
I am looking for advice from someone with experience using O2 sensor to help calibrate injector drive signal, and specifically the impact of water injection (upstream of intake valve) on the operation of the O2 sensor. Maximum water injection (at full power) is expected to be about 0.04 lbm water / lbm air.
Will this injection have an impact on the O2 sensor signal?
Once the fuel injectors are calibrated, we will switch the ADI from water to 50MW (50/50 water methanol (by weight)). But we will do the calibration work using just water, so that we do not introduce additional combustibles into the mix when considering O2 sensor feedback.
Thanks for your comments.