- Fri Jun 07, 2019 6:21 am
#35431
Hi,
I have made several ignitions for my Panhard cars, using a bespoke PCB fitted with an Allegro Hall sensor potted in a 3D printed case to suit the distributor variants. This just senses the cam lobe proximity, and is phased to work with the rotor arm and distributor cap, an OEM 3Ω ignition coil, or a wasted spark twin ended coil of similar impedance, and is just a points replacement system using a Gotronics control module.
I have also interfaced this same sensor with another custom PCB which works in conjunction with a dwell controlling Bosch Ignition Module, and produces a very healthy spark, jumping 40-50mm in free air, and in testing driving out & about, the ignition has been flawless in wasted spark mode using a Valeo 245129 Renault Megane dry coil.
I am about to resurrect the Speeduino again, and this time using the sensor with a missing tooth wheel, but I'd like to keep the same wasted spark set up, and dwell controlled Bosch Ignition Module, and trigger it with the Speeduino. The sensor output can be reversed with my PCB to provide a 5V square wave, so feeding this into the Speeduino is no issue for the tooth signals, but my question is can the Bosch Ignition still do the dwell control, which normally expects you to over saturate the ignition for it to work? I don't see any options to disable Speeduino dwell control, and even though I did read the Wiki, my conclusion was I need to set the dwell to a higher value, higher than the coil needs to make sure the Bosch ignition Module does its job.
I also realise I can change the module for a driver type, and let Speeduino do the dwell control, as that's what I'd normally do with MicroSquirts, IMFsofts, and others, but in this case, I'd like to do a back to back and just use the Speeduino as an ignition only device to create a remapped ignition for this engine.
Sorry, if I'm being thick and this has been asked before.
Mike
I have made several ignitions for my Panhard cars, using a bespoke PCB fitted with an Allegro Hall sensor potted in a 3D printed case to suit the distributor variants. This just senses the cam lobe proximity, and is phased to work with the rotor arm and distributor cap, an OEM 3Ω ignition coil, or a wasted spark twin ended coil of similar impedance, and is just a points replacement system using a Gotronics control module.
I have also interfaced this same sensor with another custom PCB which works in conjunction with a dwell controlling Bosch Ignition Module, and produces a very healthy spark, jumping 40-50mm in free air, and in testing driving out & about, the ignition has been flawless in wasted spark mode using a Valeo 245129 Renault Megane dry coil.
I am about to resurrect the Speeduino again, and this time using the sensor with a missing tooth wheel, but I'd like to keep the same wasted spark set up, and dwell controlled Bosch Ignition Module, and trigger it with the Speeduino. The sensor output can be reversed with my PCB to provide a 5V square wave, so feeding this into the Speeduino is no issue for the tooth signals, but my question is can the Bosch Ignition still do the dwell control, which normally expects you to over saturate the ignition for it to work? I don't see any options to disable Speeduino dwell control, and even though I did read the Wiki, my conclusion was I need to set the dwell to a higher value, higher than the coil needs to make sure the Bosch ignition Module does its job.
I also realise I can change the module for a driver type, and let Speeduino do the dwell control, as that's what I'd normally do with MicroSquirts, IMFsofts, and others, but in this case, I'd like to do a back to back and just use the Speeduino as an ignition only device to create a remapped ignition for this engine.
Sorry, if I'm being thick and this has been asked before.
Mike