Sub page for MembersPage/SteenAndersen
My Progress status
This page should describe my progress, only current status here, old status moved to MembersPage/SteenAndersen/History
8. Mrs 2005
I have experimented a little with lcd_display.c to come up with a new layout for page 0 on the LCD. I removed TPS and EGT info since i dont have them, and added Vbatt and advance and engine.status to monitor Acceleration, Warmup, Deceleration, a.s.o.
- It's so nice to bee able to compile the firmware myself, with a little changes, if needed.
I'm experimenting with ego setting's to learn about my engine as it is running right now. The Lambda taget table is i think the ultimate goal to tune for. As i have not control over my engine yet (no injection intalle) i cannot use VE, Ign, but i can monitor ' egoC: in the display to see how far away from the ideal lambda taget the CIS system is running and how it handle Accelerration/Decelration enrichment/leaning by use of vacuum signal in fuels pressure regulator. Very smart by analog design in 1970's. I can also monitir Warm up enrichment, witch is not so good, seems to lean out to fast with temperature. And idle control by Auxiliary air valve, closes to quickly (120 sec.) as engiene is not up to more than 25-35°C at the time and idle rpm drops 150-200 until temp is up above 55°C.
Controling CIS mixture by PWM'in Frequency valve
i'm thinking off a cheap way to control the fuel control pressure (used in CIS to control mixture) by a frequency valve. This was done originally in the 911 in 1980 by a closed loop narrow band lamba sensor, and a frequency valve (15Hz) where dyty cycle (PWM) determined the controlpreassure according to Lambda value, and then controlling A/F ratio. If i can my hands on a Frequency valve, vems should be capable of PWM controlling it proportional to the egoC: values.