Dynamic Cylinder Deactivation

[Heihetech]

As I have posted, the o2 sensor is a WIDEBAND OXYGEN SENSOR. It will
cheat ECU to close fuel loop at higher Lambda point, resulting less fuel
injected. The regular o2 sensor no longer works under DCD control. It
must be replaced with a WIDEBAND OXYGEN SENSOR.

[Heihetech]

Originally Posted by DonR

If you have just the one O2 sensor controlling all the cylinders, won't the injectors still be squirting fuel into the deactivated cylinders, just less of it? Wouldn't this would cause the active cylinders to run lean?
Should you not have the computer cut fuel & spark to individual cylinders on a rotating basis?

DCD Controller will function to cut the fuel injections first according to DCD
control pattern, then wideband oxygen sensor must be used to close fuel
loop in higher lambda point, or no fuel can be saved.

All in all, DCD Controller will bring DCD technology and its benefit onto any
vehicle once the full DCD Controller kit is installed.

[DonR]

So you're still cutting fuel & spark to individual sensors, but you found a way to keep the other cylinders running correctly by using the wideband O2 to fool the OE computer?

[Heihetech]

Sure, I patented Dynamic Cylinder Deactivation (DCD) technology, and
implemented it with affordable electronic retrofitting kit called "DCD
Controller". Cutting fuel according to DCD pattern is the main task, next
task is to close fuel control loop at higher lambda point. I don't care
sparks and ignitions. Waste-sparks will make no problem, right?

You will find "DCD Controller" is the most affordable and most effective
fuel saving gadget. It brings DCD concept into reality.

[Heihetech]

To reply "t vago"'s comments below ----

Heat transfer is always bi-directional, so if you think cylinders will be heated
up by coolant, then the heat generated from compression will be transfered
into coolant. This means energy loss into the coolant. In case of Traditional
Cylinder Deactivation, compression happens TWICE in One ENGINE cycle, so
the energy loss will be doubled.

Nothing is perfect in this world, so my online article and DCD itself is not so
perfect, but it does save with very high utilization. Theoratically, as you
have analyzed, Traditional Cylinder Deactivation (TCD) seems more perfect
than Dynamic Cylinder Deactivation (DCD), but it suffers utilization as one
of its killing factors. TCD disables 50% cylinders in the engine, left a power
output of 45%. Such power can't be used under most of driving modes. As
a resullt, TCD has be off most of the time, becoming useless. There seems
always NO sunshine on TCD's "solar panel", where's the benefit?

In contrast, DCD can be turned on most of time, resulting high utilization.
The resulted power level will be from 50% to 100% in multiple stages, based
on the driving need. It makes a good match between engine power and the
load, yeilding maximum savings. There's always sunshine on DCD's "solar
panel".

Further, TCD WON'T be applied to general vehicles on the road by
aftermarket retrofitting. How does it save fuel in no where? NO WAY！

[Frank Lee]

DCD sounds an awful lot like "limp home mode" but that doesn't save any gas...

[user removed]

Originally Posted by Heihetech

Sure, I patented Dynamic Cylinder Deactivation (DCD) technology, and
implemented it with affordable electronic retrofitting kit called "DCD
Controller". Cutting fuel according to DCD pattern is the main task, next
task is to close fuel control loop at higher lambda point. I don't care
sparks and ignitions. Waste-sparks will make no problem, right?

You will find "DCD Controller" is the most affordable and most effective
fuel saving gadget. It brings DCD concept into reality.

Got a patent number?

regards
Mech

[Frank Lee]

So I can simply spoof the low coolant/temp sensors and voila! controlled limp home mode?

[Frank Lee]

Originally Posted by Old Mechanic

Got a patent number?

regards
Mech

There is a 2009 patent application...

Dynamic Cylinder Deactivation with Residual Heat Recovery - Patent Application 20100050993

[deathtrain]

I still dont see how this is going to be plug and play or universal.