US965975A - Explosive-engine. - Google Patents

Description

J. F. WOOLF.

EXPLOSIVE ENGINE. AYPLIOATION FILED 213.23, 1909.

Patented Aug. 2, 191i?.

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J. I'. WOGLF. EXPLOSIVB ENGINE. APPLEOATION 211.313 P2B. 2s, 1909.

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. 13.71952?, OF MNEll-QLS, MNNESOTA, ASSIGNOR OF ONE-HALF T0 ELLES J.

THGOLF, F MNNEPOLS, .MINNESQT.

EXPLOSVE-ENGINE.

,Specification of letters Patent.

Patenten aug. s, icio.Y

Application filed February 23, 1909. Serial No. 479,504.

new and useful Improvements in Explosive-Y Engines, of which the following is a specitication. My invention relates to explosive engines, and its object is to provide a simple,'eiiicient, `and economical two stroke cycle explosive engine, and the improvements relate especiallv to the means for transfer of the gases. The improvements are illustrated in the accompanying drawings, in which- Figure l shows a central vertical section of the entire engine. Fig. Q'is a transverse section on the irregular broken line a-o of Fig. l, viewed in the direction of the arrows and showing the bottom ol one of the explosion cylinders. Fig. is a transverse section on the line Zi-l), viewed in down ward direction, and Fig. l is a. like section on the line @#0, viewed in upward direction.

In such drawing l designates a pair of 1oase castings, and 2 a pair of diiierential cylinder castings which provide the main shell or casing. These castings, l and 2, are ot such shape that when secured together they inclose and afford a bearingfor thecrank-shaft and also provide two crank-shaft compression' chambers "it, A pair of explosion cylinder castings are secured on the castings 2 and are properly centered hy means of the stud-lugs 6. They are provided vwith the usual water-jackets 7 which are surrounded hy annular exhaust chambers 8 for receiving the exhaust gases through the ports l) afforded between the castings i2 and and thej7 are also provided with openings l0 orthe usual spark-plugs, (not shown).

ln the upper portions of the casing mem` bers 2 are arranged ring valves 11.,.which with delivery ports l2, and nte the narrower members oi" A e 'der memring valves, and the rims serve also as stops to limit the downward movements of the ring valves` which have outward flanges l5 on their upper edges for engaging the top surfaces of the stops. The pair ot' castings 2 are Secured together by joint flanges 16 which provide a port llconnecting the dit'- erential spaces 18 of the two cylinders; and they are also provided with ports 19 for connecting the charging chamber with the explosion chamber. The casings are provided with the usual spring` seated check valves 20.

In the cylinders are the dilierential pistons 2l which are connected by the rods 22 to the cranks 23 on the common crank-shaft rlhe lowerand wider portions of the pistons are guided oy the casings and hy ribs 24 provided therein, and their narrower upper portions engage the inner walls of the ring valves ll with suicientfriction to reciprocate the latter to the limits of their movements. The play -o these valves is hetween the rims 14 of the casings 2 and the bases 25 of the casings 5 that. constitute the upper walls of the exhaust ports 9 anc also serve as stops for the valves.

The cycle of actions in operation is as tollows: Let it he assumed that an explosion has taken place in the lett hand member ot the engine and that the chamber a ot that. member is lilled with gast then the initialmovement of the piston will lov frictional contact carry the ring' valve from its upper position there shown to its lower position, shown in the right handmemher, and it will remain in that position, with the exhaust port 9 open, during the remainder of the eX- plosion stroke of thev piston; and when the piston has moved tar enough to uncover that port the exhaust vloegins and will `continue until the return movement of4 the piston moves the ring valve to close the port. Atpractically the same time that the piston head uncovers the ringvalve ports wider portion of the piston will have moved past the port l0 to uncover it and allow the charginh action to hegin h3' the liow ot gas e nlosiou I l f .l 0:7

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l2 the the arrows in the right hand member. When the piston begins its return stroke its head will lift tlie ring-valve in advance of it to the upper limit of the valve movement and to position to cause the cylinder rim 14,130 shut otf the valve ports 12 from communication with the passage-way 18 and to cause the upper portion of thering-valve to close the exhaust port 9, before the piston head slides upwardly within the ring-valve past its ports 12. The compression of the gas in the explosion chamber will begin as soon as the ring valve vis at restand the piston moves upwardly within it. As the wider portion of the piston again covers the port 19 lthe'gas remaining in the passage-way 18 is free to How through the port 17 to the space 18 in the other cylinder; and a fresh charge will be drawn into the compression chamber 4 through the check-valve 20. Upon the relturn of th'e piston to the position shown in the left hand member the cycle of actions will have been completed.

Havingdescribed my invention, what I claim and desire to secure by Letters Patent isw 1. In a two-cycle explosive engine, the combination withcasing members providing compression and explosion chambers and an intermediate cylinder forming a part of the compression chamber, the upper end of the cated between the top of the cylinder and/r the base of the explosion chamber casing to alternately open and close the exhaust port, substantially as set forth.

2, In a two-cycle explosive engine, the combination 'with casing members providing compression and explosion chambers and an intermediate cylinder forming la part of the compression Chamber,thc .upper end ofthe cylinder being separated from-an inner portion of the base of the explosion chamber casing by a circular space constituting an A exhaust port, of a piston within the cylinder and casing members in position to separate vthe compression chamber from the explosion chamber, a ring-valve having ports for connecting the compression space with the explosion chamber and arranged on and slidable wi. the upper portion of the piston and having a projection for engaging alternately the top of the cylinder and thebase'A the ring-valve is adapted to be reciprocated between the top of the cylinder-and the base of'the explosion chamber casing to alternately open and close the exhaust port, and an inwardly projecting rim on the upper portion of the cylinder past which the port portion of the ring-valve reciprocates and which serves to close said ports when the ring-valve is at the limit of its upward reciprocation, substantially as set forth.v

3. In a two-cycle explosive engine, the combination with casing members providing compression and explosion chambers and an intermediate cylinder forming part of the compression chamber and havingV its lower portipn wider than its body, of a piston within the cylinder and casing members in l position to separate the compression chamber V'from the explosion chamber and having its lower portion wider than lits body and fitting the narrower portion of the vcylinder but separated from the wider portion of the cylinder by a spa-ce when the piston is near the limit vof its down stroke, a ring-valve slidable on and with the upper portion of the piston and provided with ports past which the piston head slides, stops on the cylinderand upper casing member for limiting the ring-valve movements, the piston and lring-valve being arranged with reference to the cylinder tovprovide an intermediate fluid passage-way which the ring-valve ports connect with the explosion chamber as whereby the lower and wider portion of the 'the piston nears the end of its down stroke,

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piston controls the 'ow of gas fromthe compression chamber to said passage-wayvv and the narrower body portion controls the flow of 'gas from the passage-way throughthe ring-valve ports to the explosion chamber, substantially as set forth.

4C. In a two-cycle explosive engine, the combination with casing members'providing compression and explosion chambers vand an intermediate cylinder forming part of the compression chamber and having its lower portion wider than its body, oa piston" within the cylinder and casing members in position to separte thecom ression cham: ber from 'the explosion cham er and having' its lower portion widerv than its body and itting the narrower portion of thecylinder but separated from the wider. portion'o'f the cylinder by a space. when the piston is near the limit of its down stroke, a' ring-valve slidable on and with the upper Lportion of vthe piston and provided with ports past which the piston head slidbs, stops on the cylinder and upper casing member for limiting the ring-valve movements, the piston and ring-valve being arranged with reference to the cylinder to provide an intermediate fluid passage-way which 'thering-valve ports connect with the explosion chamber as the piston nears, the end of its down stroke,

and an inwardly projecting rim on the upper name to this specification in the presence of portion of the eyirider past which the port two subscribing Witnesses this 17 th day of portion of the ring-Valve reoiprocates and February 1909,.

which serves to Close said ports When the JAY F. VVOOLF. 5` ringwalve is at the limit 'of its upward Witnesses:

stroke, substantially as set forth. JNO. D. FARRAND` In testimony whereof I have signed my CEAS. H. DIXON"

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