US1046491A - Gas-engine. - Google Patents

Description

A. RANDOLPH. GAS ENGINE.

APPLICATION FILED AUG. v24, .1910.

190416,49L Patented Dec. 1o, 1912.

fwl, l WM MW UNTED STATES PATENT. OFFXCE.

ALFRED RANDOLPH, 0F SALEM, OHIO.

f GAS-ENGINE.

To all whom fit may concern:

Be it known that l', ALFRED RANDQLPH, a citizen of the Unitedv States, residing at Salem, Columbiana-county, Ohio, have invented certain new' and useful Improvements in Gas-Engines, of which the following isl a specification.

This invention, pertaining to gas engines of two-cycle type, will be readilyunderstood from the following description taken in connection with the accompanying draW- ing, in which:- l t Figure 1 is avertically longitudinal section of a gas engine exemplifying my invention;

and Fig. 2 is a side elevation of the timing device; diagrammatiolines connecting Figs. .1 and2 to illustrate suitable circuit connectionsb'etween the timing device and the electromagnet for operating the fuel-valve. In the drawing :-1, indicates the -cylinder: 2, the closed crank-case connected therewith: 3, the crank-shaft: 4, the piston: 5, the connecting rod: 6, the inlet-port for admitting fuel into the upper end of the cylinder: 7, the exhaust-passage: 8, the eX- haust-port leading'trom the cylinder to the' exhaust-passage and opened and closed .by the piston in its reciprocations: 10, an igniter, of usual type, to ignite the charge in' the cylinder: '11, a port placing the crank-- case in communication vwith thecylinder, this port being opened and closed by the piston in its reciprocations: 12,- an inwardly,

opening check-valve to admit air to the crank-case: 13, a supplementary cylinder open to the crank-case: 14, a piston v in the supplementary cylinder:

15, a rocker pivoted within the 'crankcase and connected A. with the supplementary piston: 16,'V a link connecting the piston with the rocker to. cause thefsupplementary piston' to move :iii unison with the main piston: 17 ,the fuel-inlet: 18, a diaphragm pump, the diaphragm being spring loaded: 19, a valve disposed between fuel-inlet 17 'and the pump-chamber, .this valve being the inlet-valve of the pump: 20,

'a fuel-passage leading from the lpump to inlet-port 6: 21, the discharge-valve of the pump, disposed between the pump-chamber and passage 20: 22, the fuel-valve arranged to open and close fuel-port 6, this valve opening toward the cylinder: 23, a spring oii the stem of the fuel-valve, serving to 'close it: 24, 'an electromagnet 25, the arma- Speciicjatoii of Letters Patent. Application led August 24, 1910. Serial No. 578,740.

p Patented Dec. 10, 1912.

a port placing this air-passage in communi# cation Witli the crank-case: 31, a checkvalve disposed between port A30 and passage 29 and opening away from the crankcase: 32 -one of' the fixed bearings of the crank-shaft: l33, an angularly adjustable collar clamped upon this bearing: 34, a' block of ,insulating material secured to the collar: 35, a metallic spring secured to the block between it and the bearing: 36, a contact-point carried by the spring: 37, a con- ,tact-point projecting from the crank-shaft,'

or a collar fixed to it, adapted, at each turn fof the crankshaft, to make momentary contact with point 36: 38, a conductor leading from the electromagnet to collar 33, and,

as a means for adjusting contact-spring 35 so as to bring its contact-point more or less in the range of contact-point 37: and 40, a generator of' current arranged in a conductor between the electromagnet and oontact-spring. 35', -which generator may be a battery or dynamo.

On the upstroke of the main piston a partial vacuum is created in the crank-case, which vacuum is satisfied by the inflow of air throughvalve 12. On the downstroke of the piston this air, confined in the crank- 'case, is compressed. The supplementary therefore, tocontact-point 37: 39, a screw ymounted in the insulating block and serving n f piston 14 serves in increasing the displace-- i ment on the downstroke of the main piston.

When the pressure of the aii in tliecrankcase 'exceeds the resistance of the spring on',4 valve 31, then that valve opens and permits the compressed air to iiow through passage 29 and .go to the `back of ,tlie fuel-valve; When the descending main piston opens port' ido 11 compressed air from the crank-'case blows through the cylinder and out' at exhaust, port` 8,' cleansing the cylinder of the unbl'irned gases. en the rising pistonloses instant the electric circuit is closed by4 contact-point 37, thus energizingthe elecy i6 into thev cylinder, this blastv of air spray# exhaust-port Sluit leaves the cylindercharged with -clear'airtunder some pressure, and at tromagnet, whereupon -the fuel-fvalve is quickly openedA and the compressed air from`- passage 29 permitted'toblow through port ing'into the cylinder the fuelfed through 'passage Q0, the consequence being that thev cylinder becomes charged with a mi'rrture of air' and fuel,"wh1ch, at the properjtime, is

. ignited by the igniter in the usualavay, the expansion due to the burning of the fuel'in the cylinder producing the'power stroke ef the piston.

In starting theiengine the' diaphragmpum may be Worked by hand through lever '28, t e upstroke of the diaphragm being pro- 2'0' Ithe'spri'ng load over the diaphragm, thus'. delivering fuel behind the fuelLvalve.' -After .V

duced by theflever and the downst'roke by the engine is started then the diaphragmpulsating pressure. piston 26 Works may be' filled with lubricatpump 'Will be operated by pisto'n 26 under the influence of the pulsations of pressure."

derived fronrthe exhaust, or othersource .of The chamberlin Which ingA oil', preferably of 'the same kind as is used in the crank-case, hus preventing they piston 26 from being subjected to'direct contact with the exhaust gases;- The pivot4 of lever'28, as shownyisan eccentric o1ieand silpp'ly of fuel to be carried into the cylinder by the air at each opening of the fuel valve.

Conductor 3S -is illustrated a"l being connected with cellar-33, but it is suiiicientif it beconnected With any metallic'part of the' enginein constant electrical connection'with contact-point 37. vThe angular adjustment ofcollar 83 permits of adjusting the time at which the circuit'is closed, and also the direction of crank-motion, and screw 39 provides for the adjustment of the duration of' 'time during 'which the circuitshall be closed. AS seen in the drawing, the main piston is surmounted by the detlector usuallyprovided to prevent direct flow ofv miXt-urel across the piston in usual constructions where the mixture 1s compressed inthe crank-case, the object ofthe detlectoribeing to prevent the mixture from going directly across the piston-and Wasting out of the eX- haust,'and to compel it to move upwardly-s0 as to displace the products of combustion and clean the'cylinder. ln my system the l deiector serves to prevent the air from port llfrom passing directly to the' exhaust-port y and impelsrit upwardly s0 as to cause the burnt gases to become exhausted" ahead ofA ing Waste of mixture.

Passage 29 is not for vapor but is for the conveyance of ail-to blow into the upper end of the cylinder the liquid fu'el delivered in measured quantities behind ,inlet-valve 6 -by the action of the to the valve and the valve is in turn close to the'cylinde1? The quantity of' liquid 4fuel ent-en .the quantity -or pressure of the air that'that quantityof air will always vbe sufficient -to sp'ray thefuel int'o the cylinder,n0r is the quantityf-of fuel thus sprayed into the cylinder dependent onthe pressure acting on piston 26;, whichoperates the pump; understanding :'that' t-he pump operates'full stroke 'the'.pump is small,'but little of the liquid ucl being requiredfor each lmpulse, and the uantity'sprayed into the cylinder at each the eccentric pivot ofthe pump 'lever is not quantity of fuelfper impulse. Desired richness of lmixture and high Aefiiciency are thus obtained.

present invention'relates may, be definedas a two-cycle enginehav'ing' a closed 'crank-case, and having a passage, leadingf from the crank-case to the cylinder at a pointiivhere it will be closed by the piston at the beginning of its'coilnpression stroke, and 'having an exhaust port leading from the cylinder at: a point Where 'it Will be closed by the piston at the beginning ofits compression stroke, and having a check-'valve to' admitair to the crank-case, and-havinga fuel-inlet intl the 'closed end of the 'cylinder,, and havi g valve in saidfuelfinlet close 4to the cylinder, and' having a passage leading fro-mtlie crankand having a loaded check-valve in' said the'crank-case, and having an igniter to eX- scribed yas employed in the claims lis t0 be taken as above defined.

I claim;-4 v 1.'.In aigas engine, the combination yof a crank case, a cylinder, a crank shaft, a piston adapted to compress. airin the crank `air tojthe crank case, a piston controlled exhaust port in the cylinder, a plston conlleading from the crank case to said inlet port, a fuel port in the cylinder head, a

valve seat-,secured .to the cylinder Within theincoming compressed air and before the fuel is admitted to the cylinder, thus avoidvmoving vthrough 'passa'ge29, ,understanding -impulse'will remain unchanged Vso long as,

.last-mentioned passage'opening away fromv lode thecharge Within the cylinder. v The' Xpression gas engine o f the class dethe conveyance of 'i pump. The liquid' fuel sprayed into lthe cylinder is delivered ready for vspraying close thus-sprayed into the cylinder is notldep'end- 'at eaehimpulse ofthe engine. The stroke of shifted in order' to effect adjustment of the lThe cla-ss of gas-engines 'to ,Which-the.

case .to a point'behindsaid fuel-inlet valve,

case, a connecting ro'd, a valve for admitting l trolled inlet port in the cylinder, a passage said port, a valve sleeve leading out from said seat, a fuel valve for said seat arranged to open inwardly, a valve stem extending outward through said sleeve, a spring for closing the valve, and valve operating mechanism, the valve sleeve providing a fuel space about said stem, a fuel pump, means for actuating said pump, a fuel conduit leading from said pump to the fuel chamber adjacent to said valve, an air conduit communicating with said fuel chamber and supplied from the crank case, and a check valve in said conduit to prevent return of air to the crank case. f

'2. In a gas engine, ,the'combinaticn of a crank case, a cylinder, 'a crank shaft, a piston adapted to compress air in the crank case, a connecting rod, a valve for admitting air to the crank case, a piston controlledieX- haust port in the cylinder, -a piston controlled inlet port in the cylinder, a passage leading from the crank case to said inlet port, a fuel port in the cylinder head, a fuel valve for said port arranged to open inwardly, valve-operating means, a fuel chamber adjacent to the valve, a fuel pump, means by which the action of the engine operates said pump, a fuel conduit from said pump to said fuel chamber, an air conduit communicating with said chamber, and connected with the crank pase, and a puppet valve in said conduit tov prevent return of air from said fuel chamber.

3. In a gas engine, the combination of a crank case, a cylinder, a crank shaft, a pis- .ton adapted to compress air in the crank case, a connecting rod, a valve for admitting air to the crank case, apiston controlled eX- haust port in the cylinder, a piston controlled inlet port in the cylinder, a passage leading from the crank case to said inlet port, a fuel port in the cylinder head, a fuel valve forsaid port arranged to open inwardly, valve-operating means, a fuel chamber adjacent to the valve, a fuel pump, means by which the action of the engine operates said pump, a fuel conduit from said pump to said fuel chamber, an air conduit lcommunicating with said chamber and connected with the crank'case, a puppet valve in said conduit to prevent return of air from said fuel chamber, and means for adjusting the pumping capacity of the fuel pump.

4. In a gas engine, the combination of a crank case, a cylinder, a crank shaft, a piston adapted to compress air in thecrank case, a connecting rod, a valve for admitting air to the crank case', a piston controlled eX- haust port in the cylinder, a piston controlled inlet port in the cylinder, a passage leading from'the crank case to said inlet port, a fuel port in thecylinder head, a fuel valve sleeve for said port, a puppet valve seated against the end of said sleeve and arranged to open inwardly, a valve stem, the sleeve being enlarged about said stem to provide a fuel space, means for operating said valve, a fuel conduit leading to said fuel space, a fuel pump, motor-actuated means for actuating the pump, means by which the pump action may beadjusted, an air conduit leading from the crank case to the rear end of said fuel space, and a check valve in said conduit to prevent return or air.

5. In a gas engine, the combination of crank case, a cylinder, a crank shaft, a piston adapted to compress air in the crank case, a connecting rod, a Valve for admitting air to the crank case, a piston controlled eX- haust port in the 'cylinder a piston controlled inlet port in the cylinder, a passage leading from thecrank case to said inlet port, a fuel port in the cylinder head, a fuel valve sleeve for said port, a puppet valve seated against the end of said sleeve and arranged to open inwardly, a valve stem,l the sleeve being enlarged about said stem to provide a fuel space, an electro-magnet fixed near said valve stem, an armature on the stem to be pulled by the magnet to open' the valve,` a spring to close the valve, a current source, an electric circuit including said magnet and said current source, a fixed contact and a moving contact carried by the crank shaft, a fuel conduit leading to saidl fuel space, a fuel pump, motor-actuated` mea-ns for actuating the pump, means by which the pump action may be adjusted, an air conduit leading from the crank case to the rear end of said fuel space, anda check valve in said conduit to prevent return of air.

ALFRED RANDOLPH.

Witnesses: i

J. C. BOONE,

NINA STEELE.

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