[Heihetech]

Shovel,

Thanks for the correct guess, and fully understand DCD into the inner core.
DCD does Has "AIR-HYBRID" Function to Recover Residual Heat in the Cylinder.
I name such function as "AIR-HYBRID", which is a special function of DCD ----
Implementation of “Air-Hybrid” with cylinder residual heat recovery.

Under the control of the DCD product, cold inlet air will become the
working fluid of the engine under DCD control, absorbing residual heat inside
the cylinders, thus expanding and contributing positive engine work, at least
some less negative work from compression that causes thermodynamic loss
(Note that traditional "air spring" is never an idea one.). Such an innovative
“Air-Hybrid” mechanism would not only increase engine efficiency, recover
residual heat and obtain extra power, but also could implement forced internal
air-cooling result inside the cylinders, avoiding engine knocking and partial
overheating, and reducing the heat loss from the radiator.

In just one word, the overall result of DCD is quite positive and effective.