Dynamic Cylinder Deactivation

[Heihetech]

Originally Posted by California98Civic

Many of us have cars that fit this description. I believe "Christ" said above that he would like to test it. So did "Frank Lee." I have read the whole forum, and from my perch--no expert to say the least--it looks interesting. I'm impressed with the debate. I don't have the AT you refer to here. I have a 1.6L MT four banger. I would be interested in aiding a test, but I'd like to know what you propose and if you are expecting test subjects to accept costs. Not certain I want to saddle any costs other than my time and my vehicle.

DCD is being applied and tested to MT vehicles in China these days, the
savings could be some 3% less than the same DCD applied to AT vehicles
driving at the same speed, or the same road condition.

This is no surprise, because MT has already had a better match than AT,
and there's less power redundency designed for MT vehicle. If your MT
vehicle is mainly driven in the city, or in the stop-and-go traffic, it is still
worthy to try DCD.

[Heihetech]

Originally Posted by Frank Lee

Am I in error in understanding what this system proposal is and how it works?

Did someone comment on my comment and I missed it?

Alternate cylinder disabling via ignition and fuel cut-offs, in a rotating pattern (not the same cylinders being deactivated all the time), and without valve deactivation... did I just describe limp-home mode or hei's proposal?

I did both. Unless I missed it, this proposal functions the same as limp-home mode. Limp home mode saves NO fuel. Limp-home mode still has pumping losses. That seems to be a difficult concept for many to get.

How did you close the fuel loop when deactivation is on? If you did not
change fuel loop control but did everything above, you just making trouble,
making "limp-home mode. Limp home mode saves NO fuel. " That's true, but
not apply to DCD.

DCD has advanced lambda control. Where's yours? DCD IS DIFFERENT THAN
YOU THINK. How did you do "rotating pattern", by hiring multiple help hands?

[Frank Lee]

I didn't do anything you goof- GM did.

[deathtrain]

why hasnt this been put down in the unicorn area yet?

[Heihetech]

Originally Posted by Frank Lee

I didn't do anything you goof- GM did.

You goof suddenly switch "I did both" into "I didn't do anything", either played
a dirty game, or throw your "Limp-home" skill to GM? In fact, GM has been
playing tranditional cylinder deactivation (TCD) for decades, and TCD has
been applied to many of GM's products, but no one says GM's products are
in "limp-home mode". How did you reach such smart conclusion that GM may
like you very much?

Since TCD has been applied to many of GM's products, so I think it must run
smooth enough to satisfy the customers for decades, not only one day or two.
One of its problems of TCD is it's over-deactivation by 50% off the
cylinders. As a result TCD has to keep OFF most of the time during driving,
becoming less effective. Some TCD users reported it is only turned on when
coasting and going down-slope. Under these driving modes, modern engines
could cut the fuel off, yielding fuel savings even without TCD. So TCD's
utlization has become a major problem.

Also, it's incorrect to think GM has played with DCD. I have the evidence that GM
never know DCD until 3 weeks after my first DCD article was published,
and they felt a little bit surprise once a GM insider found out DCD ------

It happens only 3 weeks after online publication. It sounds like "CAR KING like GM"
is still in need of and didn't know about DCD technology ------ Someone named "GMisCARKING" has presented my DCD Publication to GM VP R&D Larry
Burns' Blog at:

http://fastlane.gmblogs.com/archives...y_we_live.html

GMisCARKING
Hi Larry! There is a new kind of cylinder deactivation tech called Dynamic Cylinder Deactivation(DCD). DCD is an electronic based cylinder deactivation solution. Controlled by electronic circuits and microcontroller, it deactivates all the cylinders inside the engine dynamically and in a balanced way. That is, all the cylinders inside the engine will be working in an intermittent mode, being activated and deactivated alternatively. The result would be a well balanced engine thermal condition under which engine performance could become the best, and also residual heat recovery by engine thermodynamic expansion during deactivation cycles.

Source: http://autoelectronics.com/mag/dynam...29/index1.html

[Heihetech]

Dear All,

"DCD Controller for Fuel Saving Retrofitting", an introduction article with a
photo of the controller kit attached, has been posted online as the entry
of "Create the Future Design Contest". Please help to vote our DCD controller.

Create the Future Design Contest :: DCD Controller for Fuel Saving Retrofitting

Thanks so much!!!

[Heihetech]

Also, please note that "5 stroke cycle Otto engine" entry is a revision of our "HEIHE-2" patent that has already published -----

Create the Future Design Contest :: 5 Stroke Internal Combustion (Otto) Engine

Note: HEIHE-2 = High Efficiency Integrated Heat Engine-2

[EdKiefer]

Originally Posted by Heihetech

Dear All,

"DCD Controller for Fuel Saving Retrofitting", an introduction article with a
photo of the controller kit attached, has been posted online as the entry
of "Create the Future Design Contest". Please help to vote our DCD controller.

Create the Future Design Contest :: DCD Controller for Fuel Saving Retrofitting

Thanks so much!!!

That interesting from an electronic side of things but mechanically nothing is happening to valves for pumping loss issue .

If we look at say Honda's VCM V6 (which has 4 and 3 cylinder modes) thy disable the intake and exhaust valves . they also are balanced in respect to cylinders that are firing and order .

The only real issue with this system is it is not dynamic rotation of cylinders that can be disabled , this has led to some fouled plugs over time .

Do you have a vid of this system running (disabling/enabling ) cylinders ?

[Dunkler]

Heihetech, I will do some ABA testing on my 2007 Honda Fit A/T with your engineering sample, if you provide all the necessary instructions and will warrant my vehicles engine in the event of damage.

Edit: My guidelines for this testing are as follows:

1. I will install this into my vehicle according to your specifications.

2. I will do ABA testing and provide the data in the way that you specify.

3. I will not be charged to install this engineering sample.

4. I will not pay for the engineering sample.

5. If the engineering sample damages my vehicles engine, you will assume the liability for repairing said damage.

6. Once testing is complete, and if the product works, I will keep the product in return for the data that I will provide to you.

[t vago]

Originally Posted by Heihetech

Dear All,

"DCD Controller for Fuel Saving Retrofitting", an introduction article with a
photo of the controller kit attached, has been posted online as the entry
of "Create the Future Design Contest". Please help to vote our DCD controller.

Please show something other than your inflated claims about how deliberately putting a vehicle into limp-in mode will somehow save fuel.