DIYEFI.org Forum

yes it can be complicated it is intended to have a cylinder by cylinder tuning aproche and reduce lag in the system as current sensors sens all cylinders so you could have a lean cylinder and a rich one but the sensor would see it as ok becaus the sum of all may be fine a lot of these processes were...

well the pressure is a result of the tempriture of the gas from this information an a math moddel of your engine you can calc the amount of energy relesed during combustion compair this to the amount of fuel that was injected as we know the calorific value of the fuel and we can see if all the fuel ...

hi fred have you had a look at the maths involved in finding ppp from the paper i mentiond it is a moving window non linear least squars problem working backwards from the end of signal aqusition. i have not looked at how you guys have set out your system as i am not looking at folowing your system ...

just a small list looks like thay hav been very industrious http://www.sumobrain.com/result.html?p=1&from_ss=&srch_id=&search_name=&srch=ezsrch&all=on&uspat=on&usapp=on&eupat=on&jp=on&pct=on&date_range=all&stemming=on&sort=chron&pn=&apn=&am...

if you look up a paper called "An Ion Current Based Peak-Finding Algorithm for Pressure Peak Position Estimation" by Magnus Hellring, Ulf Holmberg the math that is used here is much less processor intensive and the fact that it starts at the back of the data and works toward the ignition e...

just about any modern twin cam engine most jap cars nissan etc audi vw (same car) hell the list is endless sorry guys i have been a little swamped had a brain fart about spark duration mesuerment and using this to controle dwell with high and low limits and for detecting shorts and disconected secon...

Jharvey the simulation that i once had acces to was simplorer from ansys i just had to pull out my old laptop looks like i still have a coppy of it from work. it was good to simulate heaps of stuff in for instance all i had to do for a spark plug is creat a black box and tell it to behave in a certa...

dave as for regulating the dc output across the gap it is not needed and if it was we can account for it. we are not reading exact values of pressure to a scale like psi. we are reading information like the PPP relative to crank angle so we are reading position and signal information such as spikes ...

ok this is the schmatic that i have been messing with dont trust any values i have been messing with values to se how thay change things and how much energy is absorbed from the coil (edit) sorry guys i cant upload for some reson

no i have not seen qucs i did once have acces to a automtive spice software but that was about 6 years ago the labcenter stuff works fine for me results are close to the math and the phiscal model