US1109694A - Two-cycle engine. - Google Patents

Description

J. H. MOSIER.

TWO CYCLE ENGINE. APPLICATION FILED NOV. 11, 1911.

' 1,109,694; Patented Sept. 8, 1914.

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y Snow 1km J. H. MOSIER.

TWO CYCLE ENGINE.

APPLICATION FILED NOV.11, 1911.

Patented Sept. 8, 1914.

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JOSEPH MOSIER, OF PROVEMONT, MICHIGAN.

Two-crow ENGINE.

particularly the inlet ports, and the object of the invention isto increase the efficiency of the engine and develop a greater amount of power from a given charge by so arranging the ports thatthe incoming fresh charge does not. mingle with the products of combustion, whereby the new charge is weak- -(il16d, nor does any of the fresh charge escape through the exhaust openmg.

A further object of the invention is to prevent back firing in the compression chamber through a delayed or late firing of the explosive mixture, such. delayed or late firing beii'ig usually caused by too'lean a mixture of the explosive gas, working upon the same principle as in a gun which hangs fire by reason of damp powder. In such case, as in j the case of a lean mixture, a portion of the charge must first burn to produce enough heat to tire the full charge. in the case of an engine incoming gases come into contact withsuch a delayed combustion, and are ig- -nited by it, thereby resulting iii-back thing. When the incoming gas is admitted-at the top of the cylinder it does not come into immediate contact with burnt gas escaping at the exhaust port, which is always the hottest part of an engine in operation. Furthermore when is admitted into the top f the cylinder the gas is always pure around vthe spark plug thereby causing a quick, sure. powerful and complete explosion and this in turn preyents carbon deposits on the piston head. Such depositswhen formed burn or are incandescent for a moment after each explosion, and after the incoming is ad-' mitted into the lower portion of the chamber it. comes into contact with such burning deposit and is liable to become ignited pre maturely thereby causing back firing.

In the accompanying drawings, Figure 1 is a central Vertical section through the upper portion of the engine cylinder, the pisto n being at the'end of the'up stroke. Fig. i

-2 is a vertical section taken at right angles to that of Fi g. 1 and showing the piston in Specification of Letters Patent.

Application filed November Patented Sept. 8, 1914. n, 1911. Serial No. 659,694.

l its lowest position. Fig. 3 is a cross section upon the line 3-3 of Fig. 1. Fig. el is a cross section upon the line 4-at of Fig. 2.

In these drawings, 1 represents that portion 01 the engine cylinder in which works a ture is introduced and ignited by means of a suitable ignition device 3. In the upper portion of said cylinder and upon opposite sides are arranged inlet ports a and below these ports and at a distance from them but somewhat less than, the length of the piston 2 are intake ports 5, the ports 4. and being c0nnected upon opposite sides of the piston respectively by vertical passages (E. Arranged at right angles to the ports 5 and in a horizontal plane substantially the same as that of the lower edges of the ports 5 are exhaust openings 7. In a motor of small size one exhaust port would be sullicient but in a larger engine such as I ha re illustrated it is preferable to provide two of these exhaust ports upon opposite sides of the cylinder, but they are connected to a connnon exhaust outlet 8 by mean of suitable passages J, which passages are inclined slightly downward in order to bring the exhaust outlet below the plane of the port 5 upon that side of he cylinder, as shown most clearly in Fig. i.

The piston and outwardly extending lips 10 upon the sides adjacent the ports 4 and through or immediately beneath said lips the piston head is provided with passages 11, which are adapted to place theports 4 into communication with the interior of the hollow piston, and also with the lower portion of the cylinder when the lips 10 are above said ports, as shown in Fig. 1. 1

ASSllllllllQ' that the parts are in the position oer-u 'ed in Fig. 2, that. is the piston head is in its lowest position; the passages 11 are in ccmnnn'iication with the ports 5, and the explosivc mixture which is introduced into the lowest portion of the engine cy inder by any desired means, not shown, passes through the passages 6 and ports 4 into the: upper portion of explosion chanber of the cylinder 1. Upon the up stroke of the piston the said charge is compressed and it will sion or compression of the said charge has it been adnntted dircctl y to that portion or" the cylinder in communication with the exhaust is provided with upwardly he operation of the engine is as follows through the ports 11 into the ports 5- be noted that at no time during the admispiston 2 and into which an explosive mixduring the time ports 7. The charge is then fired and as a result of the explosion the piston is moved downwardly, the lower portion of th'e'piston at the time of the explosion covering the ports 5. When the piston reaches its lowest point of travel it uncovers the exhaust ports and at the same time brings the passages 11 into communication again with the ports 5, the lips 10 acting as shields between the ports 5 and the exhaust passages. The burned gases therefore pass out through said exhaust passages as the'new charge is admitted through the passages 11 of the piston head, and there is at no time any possibility of commingling of the burned products in the new charge being taken in.

What I claim is 1. In an internal combustion engine, a cyl inder having'intake ports arranged upon opposite sides thereof, inlet ports in vertical alinementwith said intake ports, each inlet port having communication with one of the intake ports through a longitudinal passage, said cylinder having an exhaust port out of horizontal and vertical alinement with the intake ports, and a piston provided upon opposite sides with upwardly and outwardly extending lips, said piston eing hollow and downwardly open, and having passages in said lips, said passages being adapted'to register with the intake ports, andthe said piston covering the exhaust port during the entire time that said lips cover the inlet ports, the piston uncovering the exhaust port only that said lips register with the intake ports.

2. In an internal combustion engine, a cylinder, igniting means arranged in one end of the cylinder, inlet portsformed in oppoing also an exhaust port adjacent the site sides of the cylinder and adjacent the ignition device, a set of intake ports arranged in longitudinal alinement with the ports first mentioned, longitudinally extending passzwes connecting the intake and inlet ports respectively, an exhaust port off-set with respect to the intake ports, a hollow piston open at one end and having u'pwardl extending lips upon the end adjacent the ignition device, and having passages through said lips, the said lips being adapted to cover alternately the intake and inlet.

ports, the passages registering with said ports, and said piston being of such length that the exhaust port will be covered during the time that said lips cover the inlet ports, said lips covering the intake. ports during the entire time that the exhaust port is open.

3. An internal combustion engine comprising a cylinder open at one end and h 2W- ing an ignition device at i inner end. 5' having inlet ports dischar; said' inner end portion of t adjacent said ignition device, the i i l tffl der having also ports having free cmnm 1,-

cation through longitudinal passages with cylinder havsaid second mentioned ports, and a piston provided with lips adapted to cover the first and second mentioned ports alternately, said lips having passages thercthrough adapted to be brought into alinement with said ports as the lips pass by them.

a'osnrn n MOSIER.

the first mentioned ports, said Witnesses Eow. BOUTAIN,- HA ROLD PORTER.

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