Quote:
Originally Posted by Neil Harvey
Know absolutely nothing about the EZ units. Never had anything to do with them. Our involvement was for a customer in New Zealand who had a car sit for over 1 year without a working unit.
We looked into what was required and what this unit needed for inputs etc. We integrated a small ECU and used only the ignition side. There was some simple wiring to do, changing over plugs sort of thing. All of the stock parts (except EZ) were retained and used in the solution. Simple and effective solution for a part that was NLA.
|
The Mercedes Benz, VW, & the Porsche 965 used the basic same design to calculate the engine's RPM,
i.e. measuring the start/stop time between the leading & trailing edges of the flywheel lobes.
The Porsche 964 & the 911 3.2 used a flywheel ring gear with a missing tooth to calculate engine RPM.
Knowing the ignition coil's primary inductance, the battery voltage, & RPM, the coil's current can be controlled
such that the coil driver semiconductor is not over-heated. The EZ modules likely didn't use this approach
and just switched the coil current on and off at the spark time. This resulted in the need for a very good heat sink,
e.g. the vehicle's body.
