US1257598A - Internal-combustion engine. - Google Patents

Description

. 1. GOVLAT'A E L. ROBERTS.

INTERNAL comausrlpu ENGINE. APPLICATION FILED FEB l0.r [91T- Patented Feb. 29,1918.

2 SMEETS-SHET I.

A. J. GOLATAW L. L. ROBERTS.

INTERNAL COMBUSTION E NGINE.

APPLICATION FILED FEB. I0. 19H- Q0. 1 Gu 1 nu. 2 1D. 6 F d m m 2' SHEETS-SHEET 2.

UNITED STATES PATENT oEEIoE. Y

ANDREW J. GOLATA AND LoUIs L. ROBERTS, or DETROIT, 'MIOIIIGAEL A s'sidNoRs .OE ONE-TENTII To ARTHUR L. ELLIS, or DETROIT, MICHIGAN, AND ONEQTENHT WILLIAM w. cARswELL, OE HIGHLAND PARK, MICHIGAN.

INTERNAL-UOMBUSTION ENGINE.

Specification of Letters Patent.

. Application mea rebmaryio, 1917. serial no. 147,792.

and LOUIS L. ROBERTS, citizens o f the United States of America, residing at Detroit, in the county of Wayne and State, of'Michlgan,

have invented certain new and useful Im' our invention is to provide an engine where in the piston arrangement tends to properly balance the crank shaft of an engine, eliminate vibration, and thus insure smooth run.- ning and a hi hly eilicient explosive engine.

Another ob3ect of our invention is to provide an internal combustion engine with reciprocable inner and outer pistons operable in opposed relation with the Outer is` ton serving functionally as cylinder va ves controlling the ignition inlet and exhaust of gases to and from the combustion chambersl between the heads of the inner and Outer'fpistons.

A urther ob'ectof our invention is to provide an exp osive engine with a piston arrangement as defined above, wherein no rtiOnOf-a fresh charge of gas is lost dur- 1n exhaust, as the explosive mixture admItted to the chambers of the engine is reduced to atmospheric pressure and a fresh charge em loyed as a scavenging agent.

to provide an engine ofthe above type whereinlthe parts are constructed with a view ofreducing the cost of manufacture,

ular construction to be hereinafter described' and' then claimed.

Reference will now had to the drawings, wherein Figure v1 is a longitudinalsectional view Fig. 2 .is a vertical sectional view taken on the line II-II of Fig. 1; and

{III-III of-Fig. 1.

Fig. 3 is a similar view taken on thellin'e In the drawings, 1

A still urtherobject of our invention is tion of v alve 1 6: may be.

' ofthe shaft 3 by connecting rodsOt denotes a crank case having suitable 2 for a crank shaft 3, and. said. forfank shaft cams 6. The sets of crank portions'4 land v5 I are in opposed positions'relativegtQ fh?. axis 60 ofthe crank shaft 3 so that thflcrankshaft' will be properly balanced." y i.

7 denotes cylinders supportedby the sectional crank easel and lthese l cylinders are provided with jackets 8. and conneoted by' Ousings 9 and 10. The housiu'glOpi-.ovides a chamber 11 having' an intakel port 12,for a suitable fuel, as gasolenebrjkerosne 'sup plied from a oarburetin devic`,e tom of the chamber 11i 'as 13 for valve'rods 14 topf.v oflthe'l chamber has ports providing alvefy seats 15 for. valves 16. The valves 'Ilfi are of thel puppet type and are n oii aly seated-fon closed by the expansive ,fore of prin 'SVITQ' arranged on valve rods v1.4, ing 10. Above the chaliiberv communicating with thecyhnder ports being separated byia partitiori. 19,' so that the valves 16 may helndpendentl'ylL80 actuated to supply an eXplos'ive'I'ni'X Efe means of cams 6 to the cylinders i'.imcd'.. relation to the operationl of thepistol said cylinders. Access had'tdj-l-tli 18 forgrinding the valye' seat the medium of the detachablelcovf lin the lower partof t1i's ho`f ingl vided with rollers or aIiti-frime V 23 engaging thez cams Ggsethjt trolled b the crank shaft `Slidab e in the cylinder-Tarte piston valves 2li-aand thejheadgfo tons are provided' with intakefp spark lug `openings 261 ,flrit'ejl ed ends o the plstons 24 are wris pi -trudinginto the housings-9" ndlO'a nected tosaid wrist pinsand'the crank portions 4 of the shaft 3 are connecting rods128. Slidable in the'outer pistons 24 are inner pistons -29 connected to the crank portions 5 casi-f The cylinders 7, contiguousito the lower 1015 ends thereof'have exhaust portey 31 in communication witha suitable exhalistinanifold 32, and the Outer4v p1st0ns24 provided lio with exhaust 83 ada ted to register with the exhaust ports 81 o `the cylinders 7.4

The cylinders 7 and the water jackets 8 thereof are provided with spark-plug openings for spark 34:, and the spark plug oei'iin 26 o e a apte to register therewith, so that an exlosive mixture in the outer piston 24 may e ignited. In operation, one of the valves 16 will es tablish. communication between the chamber 11 and 'one' of the cylinders 7 and as there is 29 approaching'eacligother an as soon as the, 26

reduction of atmospheric ressure in the cylinder on the'downstroke o the outer piston the explosive mixture' is drawn into thecyiin'der, Onfthe returiior upstroke of the outer piston 24'the valve 16 is closed, the

mixture is slightlycompressed until the ports 25 register with the 'ports 18, at which me the charge or mixture is forced into. the outer piston` 2`4 betweenfthe headthereof and the'jhead ofthe `piston.'.29'. The charge or mixture islcompressed by the istons24. and

opening `26 comcideswith .the spark. ug opening' the is ignited the pistons and '29 driven away from each other..` A' downward movement of-the piston 29 will eventually uncover theexhaust port '331 of ther piston 24,- while saidpiston carries the port 'e34 inte registraties withthe.

.portl :and the. intake `of a; fresh .chait'ge tends to drive thgxhaust-.gasesfrom' e combustion chaiiibe'r.4 I,

We desire to direct attention tothetfact that the ports 1'8 4are'of greater depththan the' piston, ports 25 so' that acharge' in .the upper,A ends ofthe cylinders 7 may readily.

` pass into the ports-418` and into the ports 25,

thus reven" achar from bein'tra edp tmg E; cylindersg. with in the upper ends'of t the istons in one cylinder coperatin and' .the ignition in said cylinder timed :re ative and more uniform powjer obtained .to the ignition in the other cylinder of the engine, the crank shaft will be. smoothly than .i f a..;single.pistonwere used .in each cylinder.4 By constructingxtheouter. istons A to serve functionally as valveswe o tain a. '60

hi lier degree ofeiciency tan-if extra v wereemployedfor controllin the of fuelftothe` combustione berlo theoute'r pistonsand we would have it understood: that multi-cylinder engines.,

be ying principles louter pistons 24 are wardly between 4sai cylinders `said valve' rods to open said* valvesyinnerl and outer istons slidable one within the other and t e outer pistons slidble insaid. cylinders and provided with intake and exhaust ports, two connecting rods for -each outer piston, and a single connecting rodfor each inner piston, all ofs'aid connecting rods articulatin the ypistons relative tothe crank portions o said crank shaft.

2. In an internal combustion engine, a 1 crank shaft, 4c linders provided with fuel in-V take ports, a: ousing between saidA cylinders provided with a chamber` adapted to-com` municate with the intake ports of said rcylinder, said chamber. having fa fuel -intakefpor valves normally seated on a ported* wallof said chamber vcontrollinglthe admission of' fuel to said cylinders, `valve rods-fors`aid valves extending through'said chamber and said lhousing in proximity to said-shaft,y cams on said shaft to actuate said valve rods to seated,I inner and outer pistons slidable one within the other and the outer pistons" slid'- able in said cylinders and coperating with the inner pistons in providing combustionl ao unseat said valves,` springs on said rods in said housing holdingsaid valves normally chambers, said outer pistons `beingported` for intake and exhaust purposes, ineaiis connect `ing thej-outerpistons tosaid crank shaft` means connectingthe inner pistons to said crank shaft, and-ignitionnieans adapted for firing lfuel in the said pistons.v Y

combustion chambers" 'of turesin presence of two witneses.

AND-REW J. `Grondin.. Louis n ROBERTS; fr

Witn:

H. Burma, -ANNA Donali

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