US1077363A - Convertible cycle-motor. - Google Patents

Description

L. s. N SH. I GGN VBBTIBLE CYCLE MOTOR. AQ ILIQA'TION FILED SEPT. 28,1907.-

Patented on-4'; 1913.

2 sums-sum 1.

v INVENTOR LAWRENCE S. NASH.

WITNESSES.

'ATTOFQNEYS'.

L. s. NASH. GONVBRTIBLE CYCLE MOTOR. LPPLIOATIQH FILED SEPT. 26, 1907.

Patnted Nov. 4, 1913.

' WITNESSES: INVENTOR. LAWREND ESNASH.

AT-TORNEIYS.

an stares rarest WEE? it LAWnE-ncn SsNASI'I, or nn'rnorr, MICHIGAJ, essisnoit, BY vrnsnn h'ssrenmiiirrs, To omvnn MOTOR can 00., or DETROIT; MICHIGAN, A conroimrron or MICHIGAN;

CONVERTlBLE CYCLE-MOTOR.

hotness.

vertible Cycle-Motors of which the following is a specification, reference being had therein tothe accompanying drawings.

In automobile-and boat motors of the in ternal combustion" type, it is desirable that the fuel supply heunder the operators control thatf'it may-beregulated to. suit Work ing conditionsand variation of-load while running and it is further advantageous to have the motor adapted-tabs changed from two-cycle, to four-cycle or the reverse," to

give furtiher range offaction which may more fullymeet the requirements of service.

This invention relates to lnternal combus- 'tion niotorsa-nd especially to such engines;

provided with means whereby the mode of operationfof the engine may be determined and the engine made to work either upon a two-stroke or a four-stroke cycle, together with controlling mechanism. whereby the fuel'supply' be positively varied in ac cordance Witht-he engine load.

' The invention consists in the matters hereinafter set tenth; 'anrl'more particularly pointed out in the appended claims.

' Referring to-the drawings, Figure l is a View in vertical section transversely to the mainpshaft, or. an internal'combustion motor embodyingfeaturesof the invention.

? Fig. a VilBW in side elevation of the motorr Fig. '3 is a view-in detail of a pump ca1n., Fig. 4: 1 s a'vle v in section of a Iuel pump and shift ng lever.

In the drawings, 1 representsa cylinder having an inlet'portQ, an exhaust port 3 above it, and a hy-pass 4 opposite-the ports, as usually disposed fora two-cycle motor. The cylinder is supported on a crank case 5 which ::Eorn 1s an air compression chamber and a main shaft 6 jour'naled therein operates apiston? through the usual crank 8 and rod'E). Thepiston has a port 10 adapted to communicate with the lay-pass, the several' ports in the cylinder and piston being arranged to. obtainxthe usual compression andscavengmgjoi', each revolut on of the engine.

The cylinder head '11 is preferably concaVe a-nd cooperates With-a balfle 12 on-the I Specification of Letters Patent.

[plunger horiuall preferred form, consists ota shu'ft 'Pateanted NW; 4, 19 13.;

' Application fiIed September SwLIBOT. Serial iVaSSQBBZ. I l

piston head opposingtlhe outlets of'the -by pass to throw the inceming air from the bypass around the cy linder. An'aperture; 13 is-provided in the cylinderhead for a spark plug, and the usual 'provisionsior cooling and lubricating are also s nplied, the details of actual construction. fol ing the usual lines of goo. d shop practice.

A vaporizing valve I casing-l4 is secured 1n; the upper part of the cylinder over the,

lay-pass outlet. A c irecti air passage 15 through the casing piped to a suitable-sup.- p ly of conipres'sed afirterminates in a jet nozzle 16"ac laptedto; project a spray into transversely into the passage near its centerthrough an aperture (1 valve seat 8. A clo-; sure 19 is secured o u'a-sten'igQO a guide aperture in} a plut a nipple 22 in the easing and is seat by a spring 2 3, simultaneou both the passage 15 and tit so seated. Y

The vaporizing} seine isconnected by a pipe 24:, to the discharge of a. feedpump 25v mounted. suit albiy on the engine base The pinup, in its preferred fornn consists ofa cylinder 26 *girith a solid plunger 2? re ciprocahle therein through a shi table packing gland 28, a lqalihcheck 29 at the foot of i the cylinder actii as an inlet valve; and a second ball-check: 32 inwardly seated-bye v spring 31, formii; a discharge valvdripening into the pip; the lower end of the cylinder being pi peel to a suitable source of supply. The up per end of the plunger is connected bya t eras-pin e8 to-a "lc'v'er t if'. pivoted at its on .ter end to an extension 9,5 of the pump cash 1g, "transversely to t'heinain shaft, a longitudinal slot affording necessary play f1 tlhepiu, and'a spring between. the casing and level; holding-Abe stroke; i k

The pump operating mech hnisui. in its 36 "piirallel' to the main shaft, either Specially pro videcl or else the regular comuiutivtor shaft of the engineigrjitiousystem. :u'idin either case driven by the main shaft through suit-- Q able connections,isuch ails av gem} truiu 37,;at' half the engine speed. Ara-mi 38 is keyed to the sh'att over the pump lever: 32 and may y at the upper end 11 bareqiprocatedlongitudinally between suitable stops 39 by a forked shifting lever 40 interlocking with .peripheral parallel flanges 41. The cam comprises twp parts, one part- 42 depressing theipump lever32 in opposition to the spring 35 once during each revolution, and the other part 43 adapted to push it down twice, the shifting lever 40 holdmg either one or the other'ca'm sect1on-1n the desired operative relation "to the lever. The upward movement of the plun gel" determined by a stop 44 on a rock arnl .45 pivoted to the casing and by which the stop may 'be manipulated. When another source of air supply is not. available, an air pump 46. of any standard, conventionalqtype, is operatively connected to' the cam shaft 36, and piped to a pressure tank plied. I r

In operation, the cams are timed to momentarily depress the lever 32 and pump plunger at't he instant the piston has covered the by-pass and. exhaust port on its upstroke, thereby forcing the vaporizing valve open and injecting fuel which is projected by the compressedwair thus simultaneously released by the same closure '19 in a spray into the cylinder, the piston afterward com ance with thG'WOI'k to be done through the stroke-changing mechanism of the pump. ;--,45--' pressingthe charge which is then ignited as usual. The amount of fuel injected is determined'by the stroke allowed. the plunger by the manipulation of the lever stop flA'by the operator, who canlikewise shift the pump-cam" so that the charge is injected either on each up stroke or onalternate ones,

"therebymaking the engine in effect operate either on' the 'tfwo-cycle or four-cycleplan.

1 47 from the atomizing-valve'is sup-.

,Oneof' the chief features .of the invention is the economy in' fuel consumption gained by the absolute control of the fuel supply by the operator who can vary it in accord- Another feature is the efficiency of the motor whenrunning on the four-cycle plan,

because of the pure air twice forced through the cylinder, so that there is complete scavenging while the internal cooling effect is greatly increased.

- v .under pressure; a vaporizing valve of any suitable design adapted to be operated auto matically as shown may be substituted for 'riable. intermittent stroke to the plunger the preferred form described, and any mechanism which affords the properly timed vamay be used although the shifting cam and adaptability of the engine fordifferent fuels lever with its stop are extremely simple and are readily constructedand ad usted.

. Obviously, other details of construction may be varied without departing from the spirit of the invention and I do not care to limit myself to any particular form or ar rangement of parts.

lVhat I claim as my invention is 1.-A convertible'cycle motor comprising a compression chamber, a crank shaf Il ur naled therein, a cylinder havingan air 1nletoortconnected with said chamber, and

an ex ports, a cam shaft operated by the crankshaft, a two-part cam on the shaft, one part havlng a smgle lifting point, and the other aust port, a' piston controllnig-said part having two lifting points, a vaporizing valve opening into the explosion end of the cylinder, a pump-fo-rforcing liquidfnel through said 'valve, a member operable by either part of said cam to impart a stroke to the pump during the up-stroke of the piston once or twice during each revolution of the cam shaft, and meansfor'movin'g either part of thecamj into engagement with said pump-operating memben. i I 2. The combination in a two-cycle engine, of a compression chamber, a. crank shaft our naledtherein, a cylinder having aIRaIr-inlet port connected with said chamber,-.and

an exhaust port, and a piston controlling said ports, with a vaporizing valve discharging into the explosion-end .ofthe cylinder, a" fuel pump discharging intosaid valve, a cam shaft operated by the crank shaftfa lever for operating the pu'mp, a camw on the cam shaft adapted to impart a stroke to said lever during .the-up-stroke of' the piston either once or'twice during each revolution of the cam shaft, and means for shifting the cam into either said single or ,double engagement with the lever.

3. :In a two-cycle motor, with a compression chamber, a crank shaft provided therein, a cylinder havin an air inlet port connected with said cham er, and, an exhaust port, and a piston controlling the ports of the cylinder, of a cam shaft exterior to the compression-chamber and operatively connected to the main shaft, a fuel pump comprising a plunger reciprocable transversely of the cam shaft, a-lever -articulated to the plunger ,and oscillatable transversely of the cam shaft, acam shiftable longitudinally of the shaft and provided with two cam faces one of which is adapted to momentarily depress the lever once during each revolution of the cam shaft, and the other of which is adapted to momentarily de press the lever twice during each revolution of the said shaft, a stop oscillatable in the path of the lever and adapted to vary the stroke thereof, and a lever adapted to shift the cam on the shaft.

the combinatioirmammal! der of a conventional two-cycle compres-' sion engine during either each lip-stroke or during alternate l p-strokes of the piston,

said means comprising a vaporizing valve,

discharging into the explosion end of the. motor, a jet nozzle in said valve discharging into the cylinder, an air pasage through the valvendapted to be connected toa supply of compressed air,

a fuel-duct opening into 'said passage,-

a spring-pressed closure controlling the air passage and also said fuel duct, a

of the cam shaft, a-lever for operating the pump adapted to be oscillated by the cam, andxmeans for; shifting the cam to operate the lever either once ortwice ,during each revolution of the cam shaft-.

5. Means for supplying fuel to the cyl-f inder of a two-cycle engine during either each up-stroke or during alternate lip-strokes of the piston, comprising a vaporizing valve discharging into the explosionend of the motor, a jet nozzle in said valve discharging into thecylinder, an airpassage through the valve adapted to {be connected to a supply of compressed air, a spring-pressed closure simultaneouslycontrolling .the air passage and said fuel duct, a fuel-pump, a pipe connecting the outlet of the pump with the fuel duct of the valve, a plunger reciprocable in the pump, a cam shaft operated by the motor at half the motor speed, a cam reciprocable"on the shaft' a nd provided with a single and a double acting face, a lever for operating the plunger adapted to be depressed by the cam, means ior moving the cam to. operate either singly or doubly on the plunger-lever, and a stop limiting the return throw of the plungerlever, t v p Intestnnony whereof I aflix my signature I in presenceof two witnesses.

' LAWRENCE S. NASH.

Witnesses:

'C. 1%. Summer,

O'rro F. BARTHEL.

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