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Heihetech · 03-16-2012, 03:38 AM

"The first commercial DCD-application in small-displacement passenger cars is a reality as the VW Polo Blue GT hits the market."

No! Something you have posted belongs to 30+ years old traditional cylinder
deactivation, nothing new, just the VW product is new. How much would you
expect to pay for such outdated technology? You must pay some $16,000, or
$2000 to trade-in your used car to get it, not cheap. For each 4-cylinder
DCD CONTROLLER KIT, it only cost you $500, and will be paid back sooner.

Technically, it's 50% deactivation is the number that always trend to over-
deactivation, making engine power too weak to do regular driving. So it has
less chance to be turned on, not always useful. Does it deactivate 25%???
NO! But DCD can, so as to best match the engine power to the driving need,
and can be turned on most of time for maximum fuel savings. Utilization
is always a big issue for these energy saving devices.

Does it deactivate every cylinder alternatively??? NO! It only shut down 2
fixed inner cylinders, making them over cooled and suffering abnormal wear.
DCD controls vary from cycle to cycle, while mechanical control can not
act very fast. Or it would wear out soon. Yet electronics based DCD lasts
almost forever, at lease the life time of vehicle.

So you may conclude which one is better, and who will beat who??? If DCD
could not beat such outdated technology, why spend big effort to develop it?

03-16-2012, 03:38 AM	#143 (permalink)
Heihetech EcoModding Lurker Join Date: May 2011 Location: SAN JOSE, CA Posts: 76 Thanks: 12 Thanked 5 Times in 5 Posts	30+ years old traditional cylinder deactivation won't beat DCD "The first commercial DCD-application in small-displacement passenger cars is a reality as the VW Polo Blue GT hits the market." No! Something you have posted belongs to 30+ years old traditional cylinder deactivation, nothing new, just the VW product is new. How much would you expect to pay for such outdated technology? You must pay some $16,000, or $2000 to trade-in your used car to get it, not cheap. For each 4-cylinder DCD CONTROLLER KIT, it only cost you $500, and will be paid back sooner. Technically, it's 50% deactivation is the number that always trend to over- deactivation, making engine power too weak to do regular driving. So it has less chance to be turned on, not always useful. Does it deactivate 25%??? NO! But DCD can, so as to best match the engine power to the driving need, and can be turned on most of time for maximum fuel savings. Utilization is always a big issue for these energy saving devices. Does it deactivate every cylinder alternatively??? NO! It only shut down 2 fixed inner cylinders, making them over cooled and suffering abnormal wear. DCD controls vary from cycle to cycle, while mechanical control can not act very fast. Or it would wear out soon. Yet electronics based DCD lasts almost forever, at lease the life time of vehicle. So you may conclude which one is better, and who will beat who??? If DCD could not beat such outdated technology, why spend big effort to develop it?