Mike ThielvoldtPeople, we are now
Automatically tweaking fuel levels while driving!
I have added logic for determining the appropriate times to engage 3 different modes of injector pulse adjustment, and appear to be correctly applying those adjustments.
Local v Global changes: A global tweak affects the rate of fuel injection at all RPM's and all loads (air-flows). A local tweak affects the fuel injection rate at a specific RPM and load.
Map: When I refer to a "Map", I am referring to the 2-d table representing injector pulse duration vs engine load (x) and RPM (y).
Tweaker modes
- Global-only adjustments based on maximizing RPM
- global-only adjustments based on O2 sensor
- local and global adjustments based on O2 sensor
Mode 1 takes over when the engine is cold and idling.
Mode 2 takes over when the engine is warm, but has not been warm for long.
Mode 3 takes over when the engine has been warm for a while and the engine has been pulling (as opposed to coasting - a state that turns the injectors off) for a minimum amount of time.
Noticeable power improvement
The seat-feel is much improved over the original ECU. I did not expect this to be the case yet, but the impetus for the project was, in large, a difficult-to-correct hesitation when accelerating using the original ECU. This has already been eliminated. Woot.
Next up:
- fix bug with RPM measurement when engine is off.
- get a manual SMOG test to measure emissions.
- Start using Wide-band O2 hardware
- Build wireless dash-monitor.
Discussions
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Passed SMOG, way cool!
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Lots of luck with the SMOG guy.
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