MOTEUR A COMBUSTION INTERNE A CAME A COURSE VARIABLE ET CYCLE VARIABLE (M - VC/S CAM)

M - VC/S CAM VARIABLE CYCLE/VARIABLE STROKE CAM INTERNAL COMBUSTION ENGINE

Abrégé anglais

A variable cycle / variable stroke profiled circular cam attached to a drive
shaft motivated by
multiple pistons reciprocating within annularly displaced stationary cylinders
. The engine is
designed to require a minimum of engine components to operate thus achieving a
reduction in
manufacturing time, cost, and energy requirements. Due to the low engine
parts, operating
efficiencies will result in lower fuel consumption and lower exhaust
temperatures compared to
existing engines of equivalent horsepower. Of importance is the function of
the variable
cycle/stroke feature profiled on the operating cam attached to the main drive
shaft. The
profiled cam ensures that the intake and compression strokes operate at one
half the piston
travel distance as that of the power and exhaust strokes. The pistons operate
independently
thus allowing for the profiled cam to be configured for a variable four
cycle/stroke operation.
This engine design can use many existing modified components in the
manufacturing process
thus reducing the need for re-tooling requirements. The engine can be a direct
replacement for
all existing engine applications including automotive, aviation, marine and
power tools. The
engine design is capable of expanding from 1 cylinder to a multiple of
cylinders depending on
operational requirements.

Revendications

CLAIMS
The embodiments of the invention in which an exclusive property or privilege
is claimed are
defined as follows:
1. An internal combustion engine designed to operate consisting of a variable
cycle and a
variable stroke profiled cam to power an output drive shaft, it's rotation
motivated by multiple
pistons operating in stationary annularly distributed cylinders.
2. A circular variable cycle/variable stroke profiled operating cam
3. Pistons with wristpins powering and rolling on a variable cycle/variable
stroke profiled
operating cam attached to a power output drive shaft.
4. Secondary rollers and operating mechanism attached to piston wrist pin and
in contact with
the underside of the operating cam lip .
5. A circular rotating manifold inside a cylinder manifold cover containing
both intake and
exhaust passages to provide the necessary intake and exhaust functions and
attached to the
power output drive shaft.
6. Integrated power output shaft, manifold connecting rod and manifold
rotating structure.
7. Grooved cylinder liners.
3

Description

CA 02770273 2012-02-28
, t
M - VC/S CAM
Variable Cycle / Variable Stroke
Cam
Internal Combustion Engine

CA 02770273 2012-02-28
a
Description.
The engine's main design feature is the variable cycle and variable stroke (1
)Figure 1 and the
cycle profiled operating cam (2) Figure 2 attached to a drive shaft (7). The
engine design is
simpler in construction and operation than existing similar designs.
The variable cycle/stroke profiled cam is designed as a new approach to
internal combustion
engine technology so that the intake and compression strokes are at least half
the length of the
power and exhaust strokes and the cam's circular variable cycle feature is
designed so that the
intake cycle Figure 1 (3) is 60 degrees, compression cycle (4) is 80 degrees,
the power cycle (5)
is 130 degrees, the exhaust cycle (6) is 90 degrees. The cycle spacing ensures
that in a 4 or
more cylinder configuration, there will always be two or more pistons on the
power
cycle/stroke. The power cycle/stroke allows the pistons to utilize the
combustion force for the
full linear length of the power cycle/stroke.
A counter clockwise or clockwise rotating power drive shaft (7) Figure 4 with
specially
cycle/stroke profiled operating cam (2) with an intake/exhaust manifold (8)
connected directly
to the drive shaft (7) via connecting shaft (9) secured with an end plate (29)
and with provision
for strategically located thrust bearings (28) strategicaly installed along
the drive shaft and the
engine housing (25). Main variable cycle/variable stroke profiled cam (2) is
attached to the
drive shaft either directly or machined to allow position adjustments and
attached with bolts.
The cam is circular with the top portion wider (10) than the cam structure to
allow piston wrist
pins (12) to roll on top of the cam profile and rollers (13) to roll on the
bottom of the cam lip
(11).
Intake/exhaust steel plate (15) is also adjustable and directly attached to
the intake/exhaust
manifold (8) via a connecting rod (9) to the drive shaft (7). The
intake/exhaust manifold plate is
set to rotate sealed and flush with the top of the cylinder head (31). The
plate has compatible
strategically positioned intake opening (16) Figure 7 and exhaust opening (17)
to match those in
the cylinders' intake (18) and exhaust (19) requirement for intake and exhaust
functions and
timed to perform their functions at the appropriate cycle.
1

CA 02770273 2012-02-28
e
The manifold (8) is grooved and sealed so that air/fuel from the carburetor or
fuel injector(22)
opening is continually available to inject into each cylinder intake port as
the plate opening (16)
passes over the cylinder head cover (33) opening (18) thus completing the
intake cycle. Fuel can
be injected directly into the cylinders.
The exhaust manifold (20) is a circular groove in the cylinder head cover(33)
and the manifold
(8) allowing continuous exhaust flow access to the exhaust manifold and also
sealed from the
air/fuel groove and is designed to accept the exhaust from the cylinders when
the ports overlap
and direct to the exhaust manifold exit (21). The intake groove (22) Figure 7
is set on the inner
portion of the manifold (8) and the exhaust groove (20) on the outer portion
of the manifold.
The pistons (23) Figure 5 operating inside cylinders (24) figures 6 and 7 are
equally spaced in a
circle (4 cylinders shown) with the cycle/stroke cam rotating through the
middle of the
cylinders. The cam's rotation is motivated by the powered pistons via wrist
pins (12) Figure 5
rolling on top of the profiled cam and rollers (13) also attached to the
pistons and roll on the
underside of the cam lip attached to the wrist pin with a movable plate to
allow the bottom
roller flexibility to remain attached to the cam lip. This eliminates the
requirement for
connecting rods between the pistons and the cam. The stationary cylinder walls
(24) Figure 6
have preset openings (30) to allow unobstructed cam rotation. An aluminum
cylinder head (31)
Figure 4 provides an interface between the cylinders and the intake 22 and
exhaust groove (20)
and steel plate (15) on the manifold (8) and the cylinder manifold cover (33).
ignition is
provided utilizing electronic or standard spark plugs for each cylinder.
The engine casing (25) is indicated for simplicity and can be air or liquid
cooled and contains
provisions for engine oil lubrication and ancillary engine accessory
equipment. Long mounting
bolts (26) Figure 7 secure top and bottom sections of engine and short
mounting bolts (27)
secure the top and the same bolts secure the bottom sections. This alternating
bolt spacing, ie;
26, 27, 26 etc; around the engine provide for the necessary engine security.
Exhaust gases
exiting (21) Figure 4 will be at a reduced temperature due to the length of
the power cycle/
stroke (5) Figure 1. The engine is mounted to the end product at 4 engine
mounting locations
(32) Figure 7.
2

CA 02770273 2012-02-28
Drawings
Sheet 1: Figure 1 - cycle/stroke profile
Figure 2 - cam/power shaft diagram
Figure 3 - top view of cam
Sheet 2: Figure 4 - side view of engine with selected components outlined
Sheet 3: Figure 5 - piston cam interface
Sheet 4: Figure 6- cylinder liner location and relationship to cam
Sheet 5: Figure 7 - top view of cam/piston/wristpin interface
Sheet 6: Figure 8 - top view of manifold with intake/exhaust ports and
openings
Sheet 7: Figure 9 - exploded view of cylinder head/plate/manifold/cylinder
manifold cover
Sheet 8: Figure 10- cylinder head
Sheet 9: Figure 11 - manifold steel plate with intake/exhaust openings
Sheet 10: Figure 12 - manifold
Sheet 11: Figure 13 - cylinder manifold cover
4

Dessin représentatif