Another great find by Ralph.Honda is spending lots of money on...

Another great find by Ralph.

Honda is spending lots of money on these OCP 4S engines.

United States Patent Application 20040226534
Kind Code A1
Suzuki, Masatoshi ; et al. November 18, 2004

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Charge-injected internal combustion engine, and method of operating
same


Abstract
A charge-injected internal combustion engine exhibits improved
starting performance with charge-injection timing control. A charge-
injected internal combustion engine has an air-fuel injection valve
for directly injecting a compressed air-fuel mixture into a
combustion chamber. The engine is also provided with an air pump,
driven by the crankshaft for discharging compressed air, and a
timing controller for setting injection timing of the air-fuel
injection valve. When initial startup of the engine is detected, the
controller sets the injection timing to the intake stroke. When the
engine reaches a predetermined engine speed, or when the pressure of
the injection air reaches a threshold pressure where injection of
the air-fuel mixture is possible on the compression stroke, the
timing controller switches the injection timing from the intake
stroke to the compression stroke.


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Inventors: Suzuki, Masatoshi; (Saitama, JP) ; Takizawa, Tsuyoshi;
(Saitama, JP) ; Akamatsu, Shunji; (Saitama, JP) ; Uraki, Mamoru;
(Saitama, JP)
Correspondence Name and Address: CARRIER BLACKMAN AND ASSOCIATES
24101 NOVI ROAD
SUITE 100
NOVI
MI
48375


Assignee Name and Adress: Honda Motor Co., Ltd.
Tokyo
JP


16 pages of the patent ski[[ed for brevity. A few interesting
excerpts:



BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG. 1 is a partial cross-sectional view of a multi-cylinder
charge-injection internal combustion engine constituting an
embodiment of the present invention, taken along a plane orthogonal
to a central line of rotation L2 of a crankshaft of the engine, and
is as viewed from I of FIG. 3 and FIG. 5.


[0038] Referring now to FIGS. 1 to 3, a charge-injected internal
combustion engine E, to which a first selected illustrative
embodiment of the present invention is applied, is a water-cooled,
single-cylinder four-stroke internal combustion engine. The engine E
is adopted to be mounted on a vehicle such as a motorcycle, and is
equipped with an engine body comprised of a crankcase 1 forming a
crank chamber housing a crankshaft 5, a cylinder 2 connected to an
upper end of the crankcase 1, a cylinder head 3 coupled to the upper
end of the cylinder 2, and a valve cover 4 coupled to an upper end
of the cylinder head 3.

[0117] The starting sensor 84 may also start calculating timing
during starting using the on or off state of a starting switch
rather than the rotary speed sensor 81 or a configuration using a
timer where time runs out after a prescribed period of time has
elapsed may also be adopted. Further, a recoil starter may also be
used as starting means.


[0119] A charge-injected internal combustion engine according to the
present invention may also be a multi-cylinder internal combustion
engine. Further, the internal combustion engine may be mounted on
vehicles other than motorcycles, and in addition to motorcycles, may
also be used as an outboard motor, as a small engine to run a or as
other equipment.

Have a nice day, Tom