US1016335A - Internal-combustion engine. - Google Patents

Description

A. S. KROTZ. INTERNAL ooMBUsTloN ENGINE.

APPLICATION FILED TEB.19, 1910.

Patented Feb. 6, 1912.

2 SHEETS-SHBET 1.

A. s/KRoTz. y vINTERNAL GOMBUSTION ENGINE. u

APPLICATION FILED PEBJQ, 1910.

Patnted Feb. 6, 1912.

2 SHEETS-SHEET 2.

ALVARO S. ICR-DTZ, F CHICAGO, ILLINOIS.

INTERNAL-COMBUSTIQN ENGINE.

Specification of Letters Patent.

Application filed February 19, 1910. Serial No.v 544,849.

To all whom t may concern.' c

Be it known that I, ALvARo S. KRoTz,-'a citizen of the United States of America, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Internal-Combustion Engines, of which the following is a specification.

This invention relates to certain improvements in internal combustion engines and the means for positively introducing the explosive charges of mixed air and vapor into the explosion chambers of thesame. And

` the presentv improvement has for its object to provide a simple and encient pumping mechanism operating in unison with the engine and adapted to positively introduce successive charges of mlxed air and vapor into the explos'ion chamber of the engine during the continued operation ofthe same,

. allas will hereinafter more fully appear.

' tional elevationvof the fuel feeding pump.

Similar numerals. of reference indicate like parts in the several views.

Referring to the drawings, 1 represents the engine cylinder preferably of the air vcooled type; 2 the chambered or skirted piston, and 3 the usual closed casing to which one end of the cylinder is secured in the usual manner. Such casing is provided with the usual bearings for the crank shaft and for other usual mechanisms of the engine. y

4 is the exhaust neck or passageof the cylinder 1, having communication with the interior of said cylinder at a point 4which is only uncovered by the piston 2 when the same is at the end of it-s outward stroke.

`5 is an exhaust pipe extending from the aforesaid neck 4 and preferably connected to the air heater hereinafter described. l

6 is a transverse ridge or projection on the inner and closed head of the skirted piston 2. Said ridge is of an angular form with its vertical wall next adjacent to the hereinafter described air inlet passage in the Wall of the cylinder 1 -a-nd with its inclined portion sloping toward the. aforesaid exhaust neck 4, as shown, the formation being adapted to materially aid in the removal of the exploded charge from the cylinder by means hereinafter described.

7 is a longitudinal passage formed in a side of the cylinder 1 opposite to the exhaust neck l4, aforesaid. One end of said passage communicates with the interior of the cylinder on a plane with thesaid -ex'- rammed Feb. e, 1912.

haustneck 4, while its other end is adapted tov register with a port 8 formed in the skirt of the piston 2, so that when said port and passage are in register the passage will form a communication between the respective chamber of the cylinder 1 and casing 3afo-resaid. i

9 is a. curved deflecting plate arranged in one side of the chamber'of the piston 2, and immediately in front of the port 8 thereof. Said deiiecting plate is adapted to cause an indirect and very effective circulation of the air in the interior of the piston as said air passes from the casing 3 into the explosive chamber of the cylinder 1, to aid materially in carrying off `the heat accumulating, in said piston during a continued operation ofthe engine.

10 is a crank shaftv journaled in the casing 3, and having a pitman connection 11 with the engine piston 2, as usual.y

l 12 is a disk valve member ixedly secured to the crankshaft 10 and havi'ng a seat or bearing against an end of the casing 3. Said valve member is formed with a segmental slot or port 13, adapted at proper intervals in its travel in a circular path to register with an air inlet passage 14 in the casing 8, as shown in Figs. 1 and 2.

15 is a countershaft journaled on the casing 3, and having operative connection with the crank shaft 10, by a pair of gear wheels 16 and 17, having proportionate diameters of one to two asl illustrated in Fig. 1.

18 is a spark'plug, the energizing electric current towhich is controlled by the move- -ment'of the engine in the usual manner.

fuel piston chamber arranged in parallel- 25 is a cross-head connecting the two pis tons together to impose simultaneous movement upon the same.

26 is a supply pipe extending from a suitable supply of liquid fuel, and connected to an inlet port which opens into the liquid fuel piston chamber aforesaid of the pump midway the length of said chamber, as shown.

27 is a needle or like valve arranged in vthe supply pipe 26 and adapted to throttle the passage in said pipe to suit varying requirements in the continued operation of the engine.

28 is an outlet passage from the end of I the liquid fuel piston chamber, and containpassage.

ing a check valve 29' intermediate its length. Such passage is of the tortuous form shown in Fig. 3, and its outlet end opens into a transparent walled chamber 30, carried by the pump casing and enabling the operator to view the ow of liquid fuel froln said 31 is an air inlet pipe also opening into said transparent walled chamber 30 in common with the outlet passage 28 aforesaid. Said inlet pipe is adapted to introduce a supply of air from a suitable source, preferably from the preheating attachment hereinafter describe Y 32 is the ixilet passage of the air and liquid fuel piston chamber aforesaid; said passage opens at one end into said piston chamber midway its length, and at the other end -opens into the bottom of the transparent Walled chamber 30, aforesaid. 33 is the outlet passage from the end of said air and liquid fuel piston chamber and contains a check valve 34 intermediate its length. The inclosing wall of said passage is adapted for connection to the upper end of the explosion chamber of the engine as shown inv Fig. 1, and preferably ending in a discharge nozzle 35 of any usual form.

36 is a casing surrounding a portion of the exhaust pipe 5 of the engine and attached to said pipe by end heads as shown. Near one end said casing is provided with a series of inlet orices 37 for `air,and near the oppositel end has ,communieation with the air'pipe 31, which extendstojfthe fuel feeding pump as heretofore described.

The described arrangement of parts is adapted to afford a very durable and efficient preheating attachment for heating the air which is supplied to the fuel feeding pump to aid in vaporizing the liquid fuel.

The operation of the engineproper is as follows: Following an explosionwithin the engine cylinder 1 the piston 2 moves outward within said cylinder compressing the air contained in the casing 3, and as it reaches its full out stroke uncovers the eX- haust port 4, to permit the escape of the spent gases, and at the same time registers the piston port 8 with the passage 7 to permit the compressed air in the casing 3 to flow into the cylinder 1 and aid in expelling the spent gases. During such operation the port 13 of the valve member 12 is out of register with the air inlet passage 14, so that there is no leakage at such point. With an inward movement of the piston 2, the exhaust port 4 is closed, as well as the passage 7, i and at the same time the port 13 is brought into register with the air inlet passage 14 to permit a' fresh supply of air to be drawn into the casing 3, by the piston in its inward movement. The above described inward movement of the piston 2,'as well as the succeeding outward and inward movements of the piston are inactive ones and are attained by the momentum of the engine shaft, fly wheel, etc. to effect a scavenger action in the cylinder. The next succeeding outward movement of the piston-is an active one in the cycle, and at or before its.commencement the fuel feeding pump has its action so timed as to inject a supply of fuel into the cylinder. Immediately such fuel injection occurs the spark plug 18 operates to fire the charge.

The operation of the pumping mechanism by which the fuel is positively fo-rced into the engine cylinder is as follows The air and liquid fuel piston 24, receives an inward and outward movement in its piston chamber by the described connection with the engine shaft 10. The outward movement of said piston 24 is adapted to create a' partial vacuum in its piston chamber until said piston near the end of its outward movement and uncovers the inlet port or passage 32 to permit the mixed air and liquid fuel which is in the chamber 30 to flow into the piston chamber aforesaid and fill the previously existing vacuum in the same. Said supply of air and liquid fuel is attained throu h 'the air supply passage 31,. and the liqui fuel supply passage 28. Coincident with the above described outward movement of the air and liquid fuel pump piston 24, the liquid fuel .plston 23 has an outward movement in its piston chamber and is adapted to create a. partial vacuum therein, until said piston 23 nears the end of its outward movement and uncow ers thevliquid fuel inlet passage or port 26, to permit the liquid fuel from a suitable source of supply to flow into piston chamber of the piston 23 and fill the previouslyil chambers for said pistons, an air supply eXisting vacuum in the same. The inward movement of the air and liquid fuel pump piston 24, in its piston chamber, forces the air and liquid` fuel contained in said piston chamber past the outlet check valve 34,- and through they passage 33 andy discharge nozzle 35, into' the explosion chamber of the engine, and such discharge takes placey at the before described period in the operation of the engine. Coincident with such inward movement of the air and liquid fuel piston' 24, the liquid fuel piston 23 has an'inward movement in its piston chamber, toforce the liquid fuel contents of said chamber past the outlet check valve 29' and through the passage 28 into the chamber-30, to provide a supply of liquid fuel for the succeeding outward stroke of the aforesaid air and liquid' fuel piston24.

Having thus fully described my said invention what I claim as n ew anddesire to l secure vby Letters Patent, 1s:-

passage from the secondary piston chamber and with the inlet passage to the primary piston chamber, a liquid fuel pipe connected with the inlet port of the secondary piston chamber, and an outlet casing having connection with the outlet `port of the primary piston chamber and with the explosion chamber of ther engine, and means for im parting reciprocation to said pistons, substantially as set forth. 2. A combined fuel and air feedinglpm for internal combustion engines comprising, a primary and secondary piston connected for simultaneous reciprocation, a p ump cas ing formed with primary and Secondary piston chambers for said pistons, an air supply pipe having connection with the outlet passage from the secondary piston chamber and with the inlet passage to the primary piston chamber, a liquid fuel pipe connected with the inlet port ofthe seco-ndary piston chamber, an outlet casing.

having connection with the outlet port of the primary piston chamber and with the explosion chamberof the engine, means for -preheating the air passing through Athe aforesaid air supply pipe, and means for impart-' ing reciprocation to said pistons, Substantially as set forth.

3; A combined fuel and air feeding lpump for internal combustion engines comprising a primary and secondary piston, a crosshead connecting said pistons together for simultaneous reciprocation, av pump casing formed with primary andsecondary piston pipe having connection with the outlet passage of the secondary piston chamber and with the -inlet passage to the'primary piston chamber, a liquid fuel pipevconnected with theinlet port of the secondary piston chamber, an outlet casing having connection with the outlet port of the primary piston chamber and with the explosion lchamber of the engine, and means for imparting reciprocation to-said pistons, substantially as described. l

4. A combined fuel and air feeding pump 'for' internal combustion engines comprising afprimary and secondary piston, a crosshead connecting said pistons together for simultaneous reciprocation, a pump casing formed with primary and secondary piston 4chambers for said pistons, an air `supply pipe having connection with the outlet passage Vof the secondary vpiston `chamberand with the inlet passage to the primary piston chamber, a liquid fuel pipe connected with the inlet port ofthe secondary piston chambei,` an outlet casing having connect-ion with the outlet port of the primary piston chamber and with the explosion chamber of the engine, means for preheating the airfpassing through the aforesaid air supply pipe, and

means for imparting recipro'cation to said pistons, substantially as described. 5. Acombinedsfuel and air feeding pump for internal combustion engines comprising, a primary and secondary piston connected for simultaneous reciprocation, a pump casing formedwith primaryland secondary piston chambers for said pistons, a chambered casingV carried bythe pump casing and having connection with an air supply and with the. outlet port of the secondary piston ychambers for said pistons, a chambered casing `carried by the pump casing and having connection l,with an air supply and with the loutlet port of the secondary piston lchamber and inlet-port of the primary piston chamber, a'liquid fuel 'pipe connected with the 'inlet portof the secondary piston chamber,y

any outlet casing having connectionwith the outletv port of the primary piston chamber and with the 'explosionl chamber of the engine, means for preheating theair-passing through the aforesaid air supply, and means for imparting reciprocation to said pistons, substantially as set forth. l

7. A combined fuel and air feeding pump for internal combustion engines comprising a primary and secondary piston, acrosshead connecting said pistons together for simultaneous reciprocation, a pump casing formed with primary and secondary piston chambers for saidpistons, a chambered casing carried by the pump casing and having Vconnection with an air supply and with the outlet port of the secondary piston chamber and inlet port of the primary piston chamber, a liquid fuel pipe connected with the inlet port of the secondary piston chamber, an outlet casing having connection with the outlet port of the primary piston chamber and with the explosion chamber of the engine, and means for imparting reciprocation to said pistons, substantially as set forth.

8. A combined fuel and air feeding pump for internal combustion engines comprising a primary and secondary piston, a crosshead connecting said pistons together for simultaneous reciprocation, .a' pump casing formed with primary and secondary piston"y chambers for said pistons, a chambered casing carried by the pump casing and having connection with an air supply and with the outlet port of the secondary piston chamber and inlet port of the primary piston chamber, a liquid fuel pipe connected with the inlet port of the secondary piston chamber, an outlet casing having connection With the outlet port of the primary piston chamber and with the explosion chamber of the engme, means for preheating the lair passing -through the aforesaid air supply, and means for imparting reciproca-tion to lsaid pistons,

. `substantially as set forth.

9. A combined fuel and air feeding pump for internal combustion engines comprising, a primary and secondary piston connected for simultaneous reciprocation,l a pump casing formed with primary and secondary piston chambers for said pistons, an air supply pipe having connection with the outlet passage from the secondary piston chamber and with the inlet passage to the primary piston chamber, a liquid fuel pipe connected With the inlet port of the secondary piston chamber, an outlet casing having connection with the outlet port of the primary piston chamber and with the explosion chamber of the engine, and means for imparting reciprocation to said pistons, the same comprising a countershaft operatively connected to the engine shaft, and a cam carried by said countershaft and having operative engagement With the primary piston, substantially as set forth.

10. A combined fuel and air feeding pump for internal combustion engines comprising a primary and secondary piston, a cross-head connecting said pistons together for simultaneous reciprocation, a pump cas' ing formed with primary and secondary piston chambers for said pistons, an air supply pipe having connection With the outlet -passage of the secondary piston chamber andl with the inlet passage to the primary piston chamber, a. liquid fuel pipe connected with the inlet port of the secondary piston chamber, an outlet casing having connection with the outlet port of the primary piston chamber and with the explosion chamber of the engine, and means yfor imparting reciprocation to said pistons, the same comprising a countershaft operatively connected to the engine shaft, and a cam` carried by said countershaft and having operative engagement with the primary piston, substantially as set forth.

Signed at Chicago, Illinois, this 15th day 85 ROBERT BURNS, HENRY Mon.

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