Quote:
Originally Posted by Shankenstein
Is there a thorough explanation of what each parameter means... and how they interact?
I'll give it a guess (from my experience with Ford ECU's).
Open-Loop Fueling:
MAF * Scaling Factor --> Load
Load + VVT Trim + RPM --> Open Loop Fuel Map --> Fuel Mass
Fuel Mass + Pressure + Battery Voltage + IAT --> Direct Inj PWs + Port Inj PWs (split injection may be enabled)
Closed-Loop Fueling:
Adaptive AFR Target + AFR Feedback --> Fuel Mass Trim
This probably has catalyst cycling built in.
Torque Control:
Pedal Position --> Torque Request
Torque Request - Calculated Torque --> Delta MAF
Delta MAF + Current MAF --> Delta Throttle Angle
Active Knock Control:
IAT + Load + RPM --> Open-Loop Ignition Timing
OL Ignition Timing + Time Since Knock * Ignition Advance/Retard Rates --> Closed-Loop Ignition Timing
Obviously I'm not including anything related to idle, WOT, etc that involves a threshold or limit. Can somebody clarify the structuring the parameters for me?
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It's a Denso ECU and similar to other Subaru ECUs so there is a lot of information out there from the open source. The forums at openecu.org or romraider.com are probably good places to start. The big difference however is the use of Direct Injection on this engine.
I am still a little surprised at the pricing but I guess the point was to compete directly with Ecutek. The cost for the personal edition plus the cable is about $650 with the ability to edit and trade maps, etc.