Message: 67
Date: Wed, 15 Jun 2011 09:53:23 -0400

Very interesting.

Most of the smaller engine problems that I encounter could be put off=20
with better control of ignition & fuel parameters.
So far I have never got past the thinking stage. The last nasty problem=20
I fixed on a lawn tractor required replacing the carburetor. I believe=20
there was just too much wear around the throttle shaft that caused a=20
lean mixture. A closed feedback loop as implemented with an injector=20
would have tuned around the problem.

I think the economic factors of manufacturing, marketing and maintenance=20
have made the small engine ECU a logical next step.

*John Ferrell W8CCW*

Freescale already have a reference design available through there web sitem=
,
which is intended for single and twin cylinder engines, specifically 50cc
motorcycles and 'lawn maintenance machinery' This design is based on their
reference design for an entry level ECU for 4-cylinder engines. I've asked
our Freescale rep for one of the Reference Boards a few times but was told
that they were only made for some exhibitions. I haven't had time to read
through the link, I'll do that later, but I'm pretty sure that the Autosar
OS will be dropped. Despite that the feature set is very impressive, way
ahead of something like Megasquirt.
Regards
James

--=20
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