Just before Phantom, there was a post about a wideband that had a programmable narrowband output. Anyone remember who made this, and where you could get it? Any details would help.
GrimJack said:I don't think so - many widebands have a narrowband output, but what I was looking at was a programmable narrowband output.
The idea was, as our ECU adjusts fuel delivery in closed loop mostly based on input from the O2 sensor, that this would allow us to adjust what the ECU sees and hopefully get the car running leaner while in closed loop.
A synthesised narrowband (NB) voltage is produced by the onboard microcontroller using a 10 bit A/D converter (10 bit PWM converter with single pole filter), and a 63 word lookup table (with linear interpolation).
The NB output is designed to be compatible with the raw output of a Bosch LSM-11 sensor. Refer to this eXcel spreadsheet (mentioned above) for a graph of NBsim vs AFR.