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Back: \ MembersPage/JanSaenen '''Input variables where Inj_out is dependant of...''' As my car '''will be running on Vapourised LPG injection my Inj_output timing will be dependant of Fuelpressure and Fueltemperature'''. I already have a sensor mounted that's able to collect these values. Connect the signal to free ADC inputs - mcp3208. Check the shop text for free inputs. Apparently * EC18pin12 available ADC because secondary_trigger: HALL * EC18pin6 available ADC because onboard MAP * '''injection pulsewidth calculation''' ** do some research for the formulas. Make tables and examples (octave,matlab, spreadsheet?). You can try to make final functions using +,*,table_lookup operations. Division only with power of 2 (/2, /4, /8... /256, /512 ...) ** I guess the fuel pulsewidth needs a *1/sqrt(fuel_pressure) multiplier (we'll likely use a table for sqrt() for speed. ** I have no idea how the fuel temperature will be used. Most likely another table_lookup for viscosity ? When the plan is ready, we'll add to the firmware and make it possible to enable it in config. ---- He're a link to a forum I'm member of. The problem is also stated there: http://www.e30tech.com/forum/viewtopic.php?p=218272#218272 A few questions I have after reading your reply: I want to run fully sequential injection and ignition with and Hall sensor as secondary trigger. The secondary Trigger is onboard and from what I understand in your reply this leaves EC18pin12 available. *Or is this channel used when I configure my engine to be fully sequential? From what I understand from your answer. I can use EC18pin6 as an input channel because I have an onboard MAP sensor and this input is therefore free. *Is this correct? *From what I understand I don't have to alter the hardware of my genboard to use it with Vapourised Sequential LPG Injection? '''software:''' From what I understand you need 4 look-up tables: -Fuel_temp : Vsens_out -Fuel_pressure : Vsens_out -Fuel_temp : Desity -Fuel_pressure : Density I can configure these tables in excel if you want. The values will be between: 0.25V and 4.85V. For the Fuel_pressure Vsens_out can also be configured with a code being: Vout=(c1*Pabs+C0)*Us. Or must this be in a table? *What does the original code looks like to calculate Inj_out? *Can you explain the devisions a bit more? As i'm not a software engineer I don't understand these terms.
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