[Heihetech]

Because both the Conversion idea and DCD are related to cylinder
deactivation, so I'd like you guys know something about DCD.

I think "pattern based fuel injector cut-out" isn't enough for DCD, as you
have mentioned, some "intelligent handling of the extreme lean condition"
must be applied at the same time. The solution is wideband oxygen sensor,
by which the fuel loop can be closed at higher points of lambda, much
higher than regular lambda = 1.00, according to the requirement of DCD.

Expecting an oxygen sensor for each cylinder may be nice, but too expensive,
so DCD will use only one to detect overall exhaust mixtures with oxygen,
yielding high lambda readings. However, inside each of individual cylinders,
the burning will be kept in lambda = 1.00. In case of V8 or V6 engine, two
wideband oxygen sensors must be used, one for each bank. These 2 sensors
alone would cost you $250. Yet DCD controller will still worth the money,
based on its 8% to 18% fuel savings. It can be paid bcak within one year
for professional vehicles like taxi an livery.

OEM's? They don't own DCD patent, they have to be licensed to try. I think
once DCD has been verified and proven by massive aftermarket retrofitting,
OEM's would come to enjoy DCD. Hope OEM's will find out DCD through this
post here.