dramatic historical display of the "non-obvious" atmospheric-pressure pneumatic force potential


















Light Turbo Compound engine variant     
Emerging Otto cycle CO2  emission reduction enhancement technology
US patent

An emerging new and more efficient and robust affordable Otto cycle I.C.E using new more efficient "indirect-pneumatic-coupling" means
(sea-level & low altitude) turbo compound engine (in development) capable of yielding "Otto intake cycle pumping-gain " to both the S.I. and C.I.  Otto
cycle engine as a robust adiabatic promising process that is both compatible and capable to further enhance the
specific fuel efficiency of, "lagom-
sized" Otto cycle D.I.S.I. & D.I.C.S.I.I.C.E.
UAIC strategy (gasoline direct fuel injection system) as well as neutralizing pumping-loss friction of S.I. Otto
cycle engine In spite of using the simple and cost effective
CAIC strategy (throttled fuel system) the LTCev is capable of providing  at moderate useful
engine loads n
utralized pumping-loss and provide some "pumping-gain" to said CAIC's fuel control system
using
gaseous fuels in Otto cycle S.I.engines.

NGV Global News

The Light Turbo Compound engine variant uses  an exhaust gas turbine as a "light-load blow-down turbine" but uses instead lightweight patented
indirect pneumatic coupling instead of using prior art direct mechanical or electrical coupling force. Prior art turbo-compound engine recuperated much
energy of the exhaust gas flow through blow-down turbine(s). The prior art's energy coupling of recuperated exhaust gas energy was transmitted
through problematic gear reduction to the crankshaft, or through heavy electric generator and finally to an electric motor; with gear-reduction to assist
the crankshaft, unlike the LTCev that uses
Indirect-pneumatic-coupling conveniently releasing  the substantial available sea-level atmospheric
pressure pneumatic force potential during Otto intake cycle accessing and exerting a useful positive pressure vector on piston crown (that is dependent
(for
CAIC ) at higher engine load) above light engine loads onto a piston's crown face in the cylinder during its Otto intake cycle, while synchronized
extraction and transfer of ambient air pressure from under same said piston of the same
VVICC is timely taking place with the cylinder that is performing
its Otto intake cycle, and raising the pressure of the VVICC of a cylinder performing its exhaust cycle. It also provides pumping-gain at all engine loads
to UAIC (direct fuel injection engine) being either S.I. or C.I.

Indirect pneumatic coupling *turbo compound multi cylinder Otto cycle internal combustion engine uses an
IFT (inverted-function-turbocharger)  
AKA:
"turboscavenger" TM to create useful timely under-pressure extraction pulses generated by individually and successively evacuating  the dry-
sump’s
VVICC’s air volume into the engine wet-sump/dry-sump crankcase (during said cylinder’s intake cycle)  while allowing to simultaneously
expand evacuated-air into communicating supplemental engine enclosed volumes including the  
VVICC of a cylinder performing its exhaust cycle.
http://web.mit.edu/16.unified/www/SPRING/propulsion/notes/node25.html



The timely synchronization of air evacuation* pulses synchronized with the engine firing order sequence generates unique  and
advantageous indirect pneumatic-coupling pumping-gain assistance means that further facilitate the Otto intake cycle pumping task capable to
further
variably improve the estimated specific fuel efficiency to approximately vary  least between 5 to 10% at engine part-load and
reduce by the same pourcentage its CO2 emissions during medium to high engine operating load of prior art
CAIC ( throttled) Otto cycle engine. (by reducing pumping-loss)  




Note: The fuel efficiency already provided by state of the art efficient
UAIC (direct fuel injection) engine when operated at higher engine loads range
can be significantly be improved through optimization of the "Otto intake cycle air-pressures" ; a new possibility provided when the
technology of the  Light Turbo Compound  engine variant is used in conjunction it with
UAIC (direct fuel injection) system;
as additional  improvements over  direct fuel injection system's engine fuel efficiency  by up to 15 to 20%,
can now realistically be envisioned; furthermore enhancing
AT-PZEV  emission  control, such reduction in CO2 emission & fuel consumption
can be achieved
without further increasing NOx missions .

an
unequal volume closed-loop system provides unique advantages needed for low pumping energy requirements.  IFT task ref. page 5
Dry-sum pref. fig6 index page
Dry-sump ref. fig7 page 3 LTCev
16-horse Magdeburg hemispheres
experiment (may 8, 1654)
Otto Von Guericke  

during the Otto intake cycle,
the
Light Turbo Compound engine variant
has not only the unique capability to control
throttled gas & liquid fuels engine's Pumping-loss-friction "
but also has the unique capability to provide for all*
pumping-loss
' lagom-sized ' UAIC
LTCev (shown)
prior-art  &  down-sized CAIC
SHELOM MODE  engine operation
UAIC gets more pumping-gain @
all engine loads  
R&DMI COPYRIGHT
03-20-2014
site copyright
R&DMI 06-21-2018
Otto Intake cycle
indirect pneumatic
coupling
Otto Intake cycle
indirect pneumatic
coupling
Otto Intake cycle
indirect pneumatic coupling
indirect pneumatic coupling