US1073086A - Two-cycle gas-engine. - Google Patents

Description

Patented 561st. 16, 1913.

3 SHEETS-SHEET 1.

LUWiQSB,

HumHUHfihg lmimllun 0. s. BLOSE. TWO-CYCLE GAS-ENGINE.

' APPLICATION FILED Nov. 5, 1912.

' 3 SHEETS-SHEET 2. 66 v WMQQM v Patented Sept. 16,1913.

0. s. BLOSE. TWO-CYCLE QASENGINE. APPLICATION FILED NOV. 5, 1912.

Patented Sept. 16,1913,

3 SHEETS-SHEET 3.

rwo cycnn essnnemn Specification of Letters ratent. Patented Sept-i 16, 1913.

Application filed ficvemher 6, 191%. Serial No. 729,639.

To all whom it may concern: a H

Be it known that I, CnAnLns S. BLosn, a citizen of the United States, residing at Palmerton, in the county of Carbon, State of Pennsylvania, have invented certain new and useful Improvements in Two-Cycle Gas- Engines; and I do hereby declare the following to be a full, clear, and exact description of the invention; such "as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to as engines and has for an object to provic'e a gas engine having no moving valves.

A further object of the invention is to provide a novel arrangement of intake andexhaust ports which poact with a piston having a ort in one side to control the supply of fue A further object of the invention is to rovidea novel valve controlled it'uel bowl having novel connection with the inlet ports of the engine and operated by the pressure and suction of the engine piston to supply the fuel to the engine.

With the above objects in view the invention consists of certain novel details of construction and combination of parts hereinafter fully described and claimed, it being understood that various mpdifications may be made in the minor details of construction within the scope of the ap ended claim.

In the accompanying rawings forming part of this s ecification: Figure 1 is a side elevation of t e engine. Fig. 2 is a longitudinal sectional view through the enginewith the piston at-its lower limit of stroke.

Fig. 3 is a longitudinal sectional View through the engine with the piston at its upper limit ofstroke. Fig. 4 is a vertical sectional View taken on the line M Fig. 1. Fig. 5 is a cross sectional View on the inc 5 5 Fig. 2. Fig. 6 is a longitudinal sectional view through the fuel tank. Fig. 7 is an enlarged-longitudinal sectional View perspective view of the piston. Fi 9 is a i cross sectional view taken onftheline 9- 9 Fig. 7.- Fig lois a sectional view on the line 19 -10 Fig. 2. 1 Referring now to the drawings m which Fig. 8 is a detailthereof.

like characters of reference designate similar parts, the engine is shown to comprise a water jacketed cylinder 10 having on one sidea bypass 11 which communicates with the cylinder through ports 12 and 13 as usual in 2 cycle gas engines, there being a cover plate 14 over this bypass, the cover plate being equipped with spaced openings 15 and 16 the purpose of which will presently appear. This by ass will be herein after referred to as a c ar' e box. Formed in the Wall of the cylinder iametrically op posite the ports 12 and 13 are ports 17 and 18, the upper port 17 being an exhaust port, and the lower port 18 being an air intake port for admitting air to the-crank case 19.

Within the cylinder a piston 20 is mounted having the usual deflector 21 on the top, the piston being cylindrical in form, and be in provided in one side with a port 22 w ich is adapted to alternately register with the ports 12 and 13 of the charge box. The

piston is equipped with the usual piston rod 23 which is connected in the ordinary man nor to the crank shaft 24;

A fuel bowl 25 is arranged adjacent to the charge box and includes a float chamber having a transparent cylindrical Wall 26 which is closed at the top and the bottom by closures 27 and28 respectively, the up er closure being centrally bored to'reeeive the stem 29 of a float so, this stem extendin' through the float and terminating in a bal valve 31; Upon raisin of the'float the ball valve seats in a oonica seatia32 formed in a tubular depgnding'ezrtensioniiii on the bowl bottom, oil supply pipe 34 is, connected to the extension by means of a nut 35 and within the mouth of this pipe a ball valve 36 is confined by a screen 37 and gravitates upon'a conical seat 38 to normally close the supply pipe.

A-lateral tubular extension 39 is formed nicates With a feed pipe 40 which is termina'lly e nipped with a, nozzle 41 having dis charge ranches 42 which enter the I ort ,15 of the'c'har ge box and s ra the fuel nto the f1g1118 cylinder throng t e intake ort 12 A needle valve 43 is threa ed into the bore of the nozzle to re ulate the flow-or fuel therethrough; The fuel bowl provided in the top with a tubular extension 44 to which a pipe 45 is connected, this pipe leading to the opening-l6 of the charge box and conducting the vacuum and 'pressure'of the crank case to the fuel bowl to operate the float as will presently appear. The top and bottom closures 27 and 28 of the feed bowl are clamped together by clamp bolts 46 and by these bolts; the closures are drawn tightagainstthe ends .of the transparent wall 26.

The fuel supply pipe 34 is branched at the end as shown at 47 and 48, which branches communicate respectively with a gasolene compartment 49 and kerosene or similar cheap oil compartment 50 of a tank 51, both branches being-provided with valves 52. A valve controlled drain pipe 53 opens through the bottom of the fuel bowl and opens into the kerosene compartment 50, and is utilized 'to drain the fuel bowl of kerosene when it is desired to start the engine using. gasolene as will presently appear. 1.,

The operation of the gas engine is as follows: In Fig. 3 the pistons-120. is shown at top of stroke having compressed he gas mixture above it into combustion space O ready to be ignited by electric spark of spark plug 54. Now since the crank case 19'is gas tight, a vacuum or suction has been caused below in space G'which is relieved when piston is up as shown, the lower edge of the pistonhaving uncovered the airi intake port 18 allowing fresh air to rush'iinto" the crank case and hollow piston.

As the piston moves down it closes the air intake port 18 compressing the air charge held in the crank case space G. Just before it reaches its lowest point shown in Fig. 2, its upper edge first uncovers exhaust port 17 allowing burnt gases to rush out into the air and next uncovers charge box port 12 letting in the fresh gas charge while at the same time the piston port 22 comes into registration with the charge box port '13 and the air which is being compressed below the piston escapes up through. the charge box andinto the space 0 abovethepiston carrying with it the fresh 'gas charge as shown in dotted lines.

.As the piston moves up, the piston port 22 and charge box are covered first and finally the intake and exhaust ports 12 and 17 are covered with a resultant compression of the charge confined above the piston.

' Thisup-stroke ofthe piston as above stated creates a vacuum in the crank case, and it will now be noted that the port 14 of. the charge box is located considerably below the air intake port 18 so that the charge box port is exposed before the air intake port 1 with a resultant suction through, the feed bowl pipe 45 and drawing in of fuel to' a normal level in the feed bowl, and upon this level beingreached the float-automatically closes the inlet to the how]. This normal level is reached just as the vacuum in thev v crank case is relieved by the exposing of the air port 18 when the piston passes therebeyond on its upstroke.

During the down-stroke of the piston a portion of the compressed air below the piston will pass through the registering piston port 22 and charge boxport l3 into-the feed bowl pipe 45 with a resultant pressure on the fuel and resultant forcing out of the fuel through the pipe 40 into the charge box where it is carried up into the compression space of the cylinder by the remaining-portion of the compressed air from' the crank case as above stated.

It will here be stated that upon the normal level of fuel in the feed bowl being reached the float will close the bowl inlet and after fuel level being restored upon the next suc- I tion through the pipe 45. The purpose of the ball 36 is only for holding the fuel in the bowl after it is once admitted, as without this ball check the fuel would return to the tank at each pressure through the pipe 45.

' It will thus be seen thata gas engine'has been produced which is devoid of movmg valves and that by the peculiar arrange- 'ment' of the intake and exhaustpo'rts to-- gether with the ported piston, andby the coaction of these parts, the fuel supply is automatically controlled.

It has been found by experiment that after the engine has been started on gasolene,.the gasolene supply may be shut oif and the cheaper oil supply turned on, there being no appreciable difference in the speed of the engine, but there being an appreciable difference in th cost of running the engine'- with the cheap gasolene.

The inner walls of the piston are provided with ribs as shown to facilitate cooling of the piston, the-air from the crank case circulating between, these ribs on the down stroke of the-,piston.

What is claimed, is

In a gas engine, a cylinder, acrank case, 7

a hollow piston having a port in one side, a bypass in said cylinder, said plston port 120 being adapted to momentarily register with the lower end of said bypass, a float ,controlled fuel supply device, a fuel dlscharge pipe communicating with said device and with the upper end of said bypass, a com 125 vbined pressure and vacuum conducting pipe:

oil over the moreexpensive connected. to said device and entering the In testimony whereof, I affix my signalower end of said bypass, .andeperatmg on ture, 1n the presence of two witnesses.

said float to control the flow of fuel throu h r said discharge pipe, an exhaust port in sa i I CHARLES 5 cylinder, and an air intake port in said cyl- I Witnesses? inder alternately exposed and sealed by said A; Q. HEFFERMNG, 1

piston to admitair to saicl'crank case. I H. Bonn.

Copies of this patent may be obtained or five'cents each, by addressing the Uommissioner of Patents,

I y Washington, D. c."

Images