The reason why, perhaps, I mentioned anything was because you said the system runs open loop much of the time
Nope Simon, definitely never said that, all I said was it only goes closed loop when certain rules are met, this is governed by load, throttle position & coolant temp perimeters, the truth is it's in closed loop most of the time except during cold start enrichment on petrol and when I'm giving the car a good spanking on either fuel
I didn't realise you were a supplier... thought you were a guy who had fitted / had had fitted this system.. I'm not out to cause you a problem, I like what you've done!
Lets just say I'm the development mule mate, thanks for your interest & support though.
I think the ability to read pressure and temps and compensate will only improve this system.
I'm genuinely interested to find out myself, and will share the results here.
Most LPG ECU's don't look at lambda at all - the petrol system provides all the closed loop functionality, it is impossible to disable the petrol ECU because it also runs the ignition (yes I know your system runs the ignition), it might talk to the gearbox, aircon, notably the dashboard, etc, etc.
Yep, get all that, as I've said the Canems is not meant as a substitute to LPG piggyback systems, its a complete engine management system suitable for the same people that may fit an Emerald, Omex, DTA, or MegaSquirt ect, but can also see the benefits of going dual fuel.
Most LPG ECUs work as a slave to the petrol system, there outputs are based on petrol injection timing and (to a much lesser extent) rpm gathered from the petrol ECU.
Yep, like I say they're twisting the wrong information and secondhand wrong information at that, the only word for something that works like that is.... compromised!
Many petrol engines also have variable cam timing, forced idle air, turbo boost control, etc... It would be very difficult to make a standalone aftermarket ECU which could control the wide range of marque specific devices, and talk on cam busses to marque and model specific other devices (e.g gearbox and body control ECUs) without creating problems.. Simon
As I keep saying the Canems is not meant as a substitute to LPG piggyback systems, its a complete engine management system suitable for the same people that may fit an Emerald, Omex, DTA, or MegaSquirt ect, but can also see the benefits of going dual fuel. That same person may well also choose to explore forced induction which is why the Canems system does indeed offer 3D boost control.
Yes its a niche market system, no you wouldn't fit it to a modern street car, but it does have a number of advantages over an LPG piggyback.
Not least the direct independent ignition control of each fuel type, which lets be honest is the very thing you want when you switch over to 110Ron LPG that burns in a very different way to 95Ron petrol, with this in mind it has always amazed me that direct independent ignition control for LPG is the very thing missing from something that's specifically sold as an LPG ECU????
I used the word COMPROMISED earlier, perhaps in the case of LPG piggyback ignition control it would be more accurate to use the word FLAWED!
Lets see what volume correction brings, we probably won't reference LPG temperature as its the temperature that influences volume & it's the volume swings that affect the AFRs. So forget the temp, we'll go straight to the horses mouth and measure the LPG volume changes then build our correction table accordingly.
But I guess we could look at both
Thanks for your interest in the project