US1318471A

US1318471A - Explosive-engine

Info

Publication number: US1318471A
Authority: US
Publication date: 1919-10-14
Anticipated expiration: 1936-10-14

Description

G. AMONSEN.

EXPLOSIVE ENGINE.

APPLICATION m50 FEB. 5. 19164 Patented 'Ovt 14 LSS'H.

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' ann erratas earner orare GILBERT AMONSEN, OF MINNEAPOLIS, MINNESOTA.

EXPLOSIVE-ENGINE.

Specification of.' Letters Patent.

Patented Oct. 14, 1919.

To all lwhom, t may concern:

Be, it known that I, GILBERT AMONSEN, a citizen of the United States, residing at Minneapolis, in the county f Hennepin and State ot' l.\/[innesota, have invented certain new and useful Improvements in Explosivellngines, of which the following is a speciication.

My invention relates to two-cycle horizontal explosive engines and has for its object to provide along piston which is partly cut away at its center to allow a crank to operate between the ends of said piston and within the same. A further object is to ottset both wrist pin and the Crank shaft on opposite sides of the center line of the piston, so that on the compression stroke ot the piston thel same will be forced down against the intake port and prevent leakage of the explosive mixture. Another object is to provide a. gas passageway which may have its volume changed by means ot' a plug screwable in andiout ot' the saine, thus varying the degree of compression. A still furtherl Fig. '2 is an enlarged'longitudinal sectionall view taken en line 2-2 of Fig. l. 'Fig 3. is a fragmentarycross sectional viewl taken` on line 3-3 ot Fig.` 1.

Vln constructing my improved torni of e-xplosive engine l prefer to cast the cylinders in pairs and bolt a number oli' pairs together, as shown in Fig. l. though the same may be made singly or all combined in one casting.

.\ indicated in lt`igs. 1 and f5. a casting l()y providesl two cylinders llandl2 whiclrare separated by a' wall lrand surroululcd by a a' tei'-j'acketl-t.. rlhe top portions et said cylinders andthe water-jacket are cut away across all of the cylinders.

to provide a hand hole 15, which may be closed by a cover plate 16 extending clear A casting 17, similar to casting 10, is placed adjacent to it, and is belted tast thereto by means of bolts 18 passing through

walls

19 and 20 integral with said castings and extending up flush with the top ot' hand hole 15, which bolts' may be. inserted and applied through said hand hole. Cylinders 11, 12, etc., are of uniform bore and are open at both ends. Each pair of cylinders is closed at one end with a cylinder head 21 which has Aa compleiientary water-jacket and each head covers the two corresponding cylinders and is secured thereto by means of studs '2-3. The other ends of the pairs of cylinders are covered by plates 2i which serve the same purpose as the heads 21 but are deprived of w at er-j a ck'ets.

l'l'ithin the various cylinders are positioned pistons Q5, 2G, etc., which are identical in construction and which operate in the same manner. Fig. 2 shows the details of construction and operation of piston Q and cylinder 1'2. Piston Q5 is provided with rings 4.4 at bot-h ends and has a portion of the top along the center thereof cut away to make room for a crank shaft 27 which passes directly through all of the cylinders. This crank shaft is positioned somewhat above the center lines ot the cylinders and nearer to one end of said cylinders than to the other. One of the cranks 2S is secured to a connectingrod 29 which is pivoted to one end 30 of piston Q''by means of a wrist pin -31 in the usual manner, and said crank just clears thickened portions 4G and 47 of the piston, as seen in Fig. .3 .1 The wrist pin 31 is below the centerline of the piston, as can be clearly seen in Fig. 2. `Due to this arrangement the connecting rod '29 clears the bottom ot' the piston andthe aperture in the top of the piston may be made fairly short, thus reducing the total length of the piston.

A gas passageway 3Q, is located directly under the cylinder l2, passes along the saine andcomnuniicates with the interior thereof at one end by means of a port 34 and at the other end 35 by means ot a port 36. An

tion 39 of the piston head, which is per-` forated at 40 to act as a baille for directing the incoming mixture away from the exhaust port 41. This baille also serves to heat the incoming gases which are exposed to the bottom of the same as well asto the sides of the perforations 40. In running, the crank shaft rotates in the direction indicated by the arrow in Fig. 2. The operation is as follows. When the piston travels toward the explosion endof the cylinder the carbureted gas" is drawn into the chamber 33 through a check valve 37 mounted on the plate 24 from a carbureter not shown in the drawings. Upon the reverse stroke of the piston the check valve 37 closes and the mixture within chamber 33 is compressed into the passageway 32 and as soon as the piston 25 passes the port 41 the burned gases Within chamber 35 are allowed to discharge through the same. In this position piston 25 covers both

ports

34 and 36 and so prevents any possible occurrence of backlire. When the piston then uncovers port 36 the fresh mixture rushes into chamber 35 in the usual manner, expelling nearly all the foul gases. Further movement of the piston compresses the gas in the explosion chamber which is ignited in the usual manner by a spark plug 45. It will here be noted that as the crank 28 travels through the compression stroke, the piston 25 is forced downward against the port 36 through the vertical component of force procured by offsetting the crank shaft and wrist pin from the center line of the piston, thus preventing leakage and insuring a sulicient degree of compression.

Passageway 32 communicates, as shown in Fig. 2, with a downwardly-extended bore 42 which is internally threaded to receive a plug 43. By screwing said plug into or out of the bore 42 the volume of the combined passageway can be varied to secure any degree of compression desired.

The manner of journaling the crank shaft is bestseen in Figs. 1 and 3. A pair of

bosses

48 and 49 are cast integral with the outer sides of the cylinder castings 11 and 17, and carry bearing bushings 50 which support the crank shaft at the two ends. A central bearing bushing 51 supports the crank shaft at the center and is carried by two complemental bearing

members

52 and 53.

Members

52 and 53 are held in place between the walls 19 and 2O4 of castings 11 and 17 by means of

plates

54 and 55 cast integral therewith, through which the bolts 18 pass. By this means this bearing can be easily alincd and is furthermore rigidly supported. 4

For the purpose of assembling, a slot 68 is formed in each of the

side walls

19 and 20 of the castings 10 and 17, through which the crank shaft may be inserted. vThe crank shaft 27 has attached to it at one end a fly wheel 56, as is customary with most engines. Feet 57 may be cast with lthe cylinders for supporting the engine and for securing the same to some suitable base.

The advantages of my invention are manifest. With the cover plate and hand hole positioned on the engine as shown all parts of the engine become accessible from the top and the remov/al or substitution of parts becomes very simple. The piston proper may be used as an oil reservoir and thus all of the working parts may be kept well oiled without the use of an auxiliary oiling system. The compression in the intake end of the cylinder serves as a cushion-,for the piston and helps to return it to' lopposite end.

I claim:

l. A two cycle explosive engine compris? ing a horizontal cylinder having a port in the bottom thereof, a piston within the cylinder adapted to cover said port throughvout the greater portion of its compression stroke and to remain seated over said port provide chambers at the ends of the piston,

the one being a pumping chamber andv the other an explosion chamber, a crank shaft having operative connection with said piston between the ends thereof, a charging chamber having port connections with the pumping chamber and with the explosion chamber, the opening of said ports being controlled by the piston, a valve for admitting explosive mixture into the pumping chamber, and means for varying the capacity of the charging chamber.

3. A two-cycle explosive engine comprising a horizontal cylinder, a double-ended piston in said cylinder of such length as to provide chambers at theends of the piston, the one being a pumping chamber and the other an explosion chamber, a crank shaft having operative connection with said pislOl ton between the ends thereof, a chrgng chamber having port connections with the pumping chamber and with the explosion l chamber, the opening of said ports being controlled by the iston, a valve for admitting explosive mixture into the pumping chamber, said charging chamber including a threaded cavity fitted with a. screw plug for varying at will the capacity of the charging chamber.

In testimony whereof I affix my signature in presence of two Witnesses.

. GILBERT AMONSEN. Witnesses:

CHARLOTTE E. DAY, ALEX LAGAARD.