US1068710A - Internal-combustion engine. - Google Patents

Description

0. 0. `STORLE. INTBRNALooE-*us'rron ENGINE.

Arrmommn FILED snrnls, 1941. 1,068,710. y

Patented July 29, 1913.

v XM iunrrare rarita orme,

OLE O. STORLE, OF TACOMA, WASHINGTGN.

INTERNAL-COMBUSTION ENGINE.

Specification of Letters Patent.

Patented July 29, 1913.

Application filed September 15, 1911. l Serial No. 649,416.

T0 all whom @'15 may concern,

Be it known that l, OLE O. S'ronLn, a citi- Zen ot the United States, residing at Tacoma, in the county of lierce and State of lllvashington, have invented certain new and useful Improvements in Internal-Combustion Engines, of which the following is a specification, reference being had to the accompanying drawing, forming a part thereofl The main objects of this invention are to utilize to the fullest extent the expansive force of the exploded charges 4and thereby economize power and prevent or reduce the noise of theexhaust without a muffler; to avoid dead centers, and generally to improve the construction and operation of engines of this class.

It consists in the construction, arrangement and combination of parts as hereinafter particularly described and pointed out in the claims.

In the accompanying drawinflike characters designate the same parts in the several figures.

Figure l is a vertical longitudinal section 'of an engine embodying theinvention, the pistons being shown in the positions they occupy atthe end of the suction stroke; Fig. 2 is a similar section showing t-he pistons in the positions they occupy-at the end of the compression and at the end of the exhaust stroke; Fig. 3 is a similar section showing the pistons in the rpositions they occupy at the end of the explosion or working stroke; and Fig. 4 is a plan view of the engine.

The cylinder a, which is comparatively long and open at the ends, is provided in the usual manner with a water or cooling jacketb, and with aninwardly projecting shoulder c forming a stop for one of the pistons, as `hereinafter explained.

Z and e are oppositely working trunk pistons titted in the cylinder on opposite sides of the shoulder or stop c with their closed ends toward the middle of fthe cylinder, which is provided with inlet and exhaust ports opening into the space which forms "the explosion or combustion chamber between the two pistons when they are at the inner limits oi' their movement, only the cxhaustvport f being shown.` The engine is also provided with inlet and exhaust valves, valve operating mechanism and ignitingl devices, which may be of the usual or any suitable construction, and are not shown.

Adjacent to one end of the cylinder the engine is provided with a crank g which has a longitudinally shifting connection with the piston c, whercby said piston is permitted to dwell at. the inner limit of its travel during-the suctionstroke of the other piston (l, thereby reducing the space for the admission of the explosive charge on the suction stroke of the piston (l and permitting it to expand when exploded during the simultaneous outward movementI of both pistons into a much larger' space, so as to utilize to the fullest extent the explosive force ot the charge,I and without the intervention of a muttler, to avoid or materially reduce the noise produced by the exhaust. This shifting connection between the crank g and piston c may be made as shown, by means of a head or plunger 7L fitted and movable length-A wise in the piston c and directly connected by a rod or pitman c' with the crank g.

To insure the dwelling of the piston c at the inner limit of its travel during the suction stroke of the piston d, the plunger 7L is formed through its inner end, which is otherwise closed, with one or more ports or passages j, and is provided with an inwardly opening valve 7c which closes said ports or passages when the plunger moves inward. To permit ot the free inward movement of the plunger in the piston c and at the same time prevent it from coming into violent contact therewith at the in` ner limit of its stroke, the pif Lon e is formed with one or more longitudinal air passages Z leading from the interior thereof at an intermediate point in the stroke of the plunger /z` through the outer end of the piston to the atmosphere.

The ypiston (Z connected by a rod or pitinan m with oneI arm of a. lever n, which is fulcruined in the frame or bed of the engine at the opposite end troni the crank q, The other arm ot this lever is connected by a rod o with a crank pin p onthe lywheel t] of the engine, or on the crank shaft in line with the crank g with which the piston c is connected through the plunger' 7L. and rod ln the operation of the engine, which is ot' the tour-cycle type, during the suction stroke of the piston which draws an cxplosive chargeinto the cylinder, the piston c is held as shown in Fig. l, at the inner limit otits movement by the vacuum or partial vacuum thus produced in the cylinder by the piston d; against the shoulder c, lwhile 'working' pistons fitted therein, a plunger the head or plunger 7L is drawn outward. During the return stroke of the piston Z and' plunger Izy the charge is compressed between the pistons ai and e, the outward movement of the piston e by the compression 'of the chargebeing resisted by the inward movement of the plunger h and the compression of the air therein by said plunger. The charge being ignited and exploded when the pistons and plunger are at or near the inner limits of their travel, forces both pistons Z and e simultaneously outward as shown in Fig. 3, and acts through their connections herein'before described, to turn the crank shaft, the-piston e and plunger h, operating together as one, through ,the connecting rod z on the crank g on the explosion or working stroke.. The space between the pistons (Z and e into which the chargeexpands'after its explosion, as shown in Fig. 3 Abeing much greater than the space into which it is ad mitted on the suction stroke of the pist-on (Z, as shown in Fig. 1, the expansive force of the charge is utilized to the fullest extent and its pressure being thus reduced, it escapes from the exhaust port with little or no noise.

The pistons d and e and the parts of the cylinder a in which they work, may be made ofwdiierent diameters instead of the'same diameter as shown, the engine may be provided for use in automobiles or other purposes with a number of cylinders, and various other changes in' the details of construction and arrangement of parts may be made within the scope of the invention asdelined in the following claims.

I claim: 'p

l. In an internal combustion engine the combination of a cylinder, two oppositely working pistons fitted therein, and a crank connected with said pistons, one of the pistons having va longitudinally shifting connection with the crank and being adapted to dwell at the inner limit of its travel during the suction stroke of the other piston.

2. In an internal combustion engine the combination of a cylinder, two oppositely fitted and movable lengthwise within one of said pistons and provided with a port and with an inwardly openingvalve'controllingV said port, and a crank connected with said plunger and with the other piston,

3. In an internal combustion engine the combination of a cylinder, oppositely working pistons fitted therein, a plunger fitted and movable lengthwise in one piston which piston has an air passage leading from an intermediate point in the interior thereof to the atmosphere, and a crank 'connected with said plunger and with the other piston.

t. In an internal combustion engine vthe combination of a cylinder, oppositely working pistons fitted therein, a plunger iitted and movable lengthwise in one piston which piston has an air passage leading from the interior thereof at an intermediate point in the stroke of the plunger to the atmosphere, said plunger having a portopening to the atmosphere from the interior of said piston, an inwardly opening valve cont-rolling said port, and a crank connected with said plunger and with the other piston.

5. In an internal combustion engine the combination of a cylinder, oppositely workn ing pistons fitted therein, a crank Vat one end of the engine connected hy a rod with one piston, a lever at the other end of the engine having an arm connected by a Arod with the other piston'and a rod connecting` the crank with the other arm of said lever both pistons working when forced apart to turn the crank.

6. In an internal combustion engine the combination of a cylinder comprising two parts each communicating with the other at one end, reciprocating pistons fitted therein, anda crank shaft connected with and adapted to be turned by the joint action of said pistons, one of saidpistons having a longitudinally shifting connection with the crank and being adapted to dwell at the limit of its travel toward theintercommunieating ends of the cylinder parts while the other piston makes its suction stroke.

'In witness whereof I hereto affix my s ignature in presence of two witnesses.

OLE O. STORLE.

lVitncsscs Giras. L. Goss, ALICE E. Goss.

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