Engine using compressed air

Details Engine using compressed air Engine using compressed air

1994-11-30

1996-02-20

Look, Edward K.

Power plants

Pressure fluid source and motor

Cyclically operable reciprocating or oscillating motor or...

F16D 3102

Patent

active

054919770

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

(1) Field of the Invention
This invention relates to an engine using compressed air as a power instead of fuel such as gasoline or diesel and, more particularly, to an engine which is driven by ascending and descending operations of pistons by compressed air induced into cylinders of the engine body.
(2) Background of the Prior Art
Generally, power needed for an engine used in a vehicle and in industrial machinery is obtained by burning gasoline or diesel, which causes an air pollution, emission problem.
Thus a vehicle driven by electric power is now being developed, but until now it has been difficult to be widely used because of many problems, especially low power or weight.
In a four-cycle internal combustion engine a cycle including an intake-stroke, a compression-stroke, an explosion-stroke and a exhaustion-stroke is accomplished while a crank shaft is rotated twice.
The explosion stroke occurs just once during twice rotation of the crank shaft, which causes substantial power loss during the other strokes. Thus a fly-wheel is needed for a constant rotation speed of the crank shaft.
Seen from another aspect, the internal combustion engine needs fuel. In order to improve fuel consumption ratio an engine using lean mixer is developed only to save a little fuel.
Further in order to reduce exhaust gas, many attempts including exhaust gas recirculation system have been done but these attempts require additional installations and need much time to accomplish a satisfactory purpose.


SUMMARY OF THE INVENTION

It is an object of the invention to provide an engine which is not driven by burning fuel such as gasoline and diesel.
It is another object of the invention to provide an engine which is more compact than a conventional internal combustion engine.
To accomplish the above objects, the present invention provides an engine driven by a compressed air, including a electric motor driven by a battery, means for generating the compressed air by use of a driving power of the electric motor, an intake manifold connected with an outlet of the means, a cylinder block including a plurality of cylinders communicating with the intake manifold, a crank shaft connected to a piston of the cylinder by a connecting rod, and a cam shaft connected with the crank shaft by means of the belt or chain.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate one embodiment of the invention and together with the description, serve to explain the principles of the invention.


BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a partially cutaway view in perspective showing an engine body according to a preferred embodiment of the invention.
FIG. 2 is a schematic view of the invention.
FIG. 3 is a perspective view of a crank shaft according to the invention.
FIG. 4 is a front view of a cam shaft according to the invention.
FIGS. 5A through 5D are views showing relation of positions of an intake cam and cylinders according to the invention.
FIGS. 6A through 6D are views showing relation of positions of an exhaust cam and cylinders according to the invention.
FIG. 7 is a table illustrating the relation of angles of the crank pin and strokes of the cylinders according to the invention.
FIG. 8 is a table illustrating the valve timing of the engine according to the invention.


DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT

Referring now to the drawings with greater particularity, FIG. 1 is a cutaway view in perspective showing an engine according to the invention, in which the engine comprises a cylinder block 2. the cylinder block 2 is moulded in the form of block structure in a body with cylinders more than 4. An oil pan 4 for containing oil for lubricating parts of the engine is connected to lower portion of the cylinder block 2. Each cylinder 6 disposed inside of the cylinder block 2 has a piston 8 which moves in a straight line.
Each piston 8 is connected to a connecting rod 12 and the straight-line motion of the piston 8 is converted to rotation of a cra

REFERENCES:
patent: 1496490 (1924-06-01), Powell
patent: 1569582 (1926-01-01), Scott
patent: 1667213 (1928-04-01), Marchetti
patent: 2383213 (1945-08-01), Porter
patent: 3765180 (1973-10-01), Brown
patent: 3885387 (1975-05-01), Simington
patent: 4102130 (1978-07-01), Stricklin
patent: 4111164 (1978-09-01), Wuerfel

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