HCCI single cylinder injection and ignition piggy back system

This was done many-many months ago. Now I don't even remember how it should work exactly. But this was built to help my colleague doing his PhD work on HCCI engine. HCCI stands for homogenous charge compression ignition. He was working on a single cylinder direct injection research engine and trying to convert that to HCCI operation. The idea was to build a piggy back system that would take over the injection and ignition control of the engine. The system would truncate the fuel delivery pulse so that a very lean operation would ensue. The system was also supposed to cut off the ignition when operating in HCCI mode. To assist combustion, alternate firing of the spark was desired (alternate cycle will have ignition spark). There was also a swicth that would allow the engine to operate either on HCCI or on normal mode.

Sadly, the system was never tested. As I completed building it, my friend had found other options. Nonetheless, it was tested using relay in place of fuel injector, and some LED to show the ignition.

Here is the picure of the system. The top half is the simulated engine (relay and injector and LED as ignition).








I don't have the schematics drawn yet. But the source code is here

The HEX file is here