US901256A - Admission-valve for gas-engines. - Google Patents

Description

G. BJPETSGHE.

AnMIssmN VALVE FOR GAS ENGINES.

APPLIUA'I'ION TILED MAR. 7, 1906.

Patented Oct. 1-3, 1908.

A; ATTORNEY.

UNITED STATES PATENT curios.

. GUSTAV 1B. PETSOHE, OF PHILADELPHIA, PENNSYLVANIA ASSIGNOR .TO OUTHWARK FOUNDRY AND "MACHINE COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPO- RATION OF TENNSYLVA NIA.

KDMISSION-VATLYE FOR GAS-ENGINES.

"Specification of LettersPatent.

Patented Oct. 13, 13908.

Driginalapplication filodDecember 30, :1904, Serial No. 238,917. Divided and this application filed March 7, 1906. Serial No. 304,627.

To all whom it may-concern: Be it known that -I, GUs'mv B. Pn'rsonaf a subject of the Emperor, of Germany, re-; siding in the city-and county of .Philadel-i -.p.hia, in the-State of .Pennsylvania, have in-* vented a certain new and useful Improvement in Admission-Valves for Gas-Engines, of-which..the following is a true and exact udescription,ireferencebeing had to the accompanying drawings, which form a partthereof; 1 My :invention relates to the construction: rand-operation of admission valves for gas; engines,.andhas for its-object to provide an; admission valve of simple construction and 5 by which the same miziture proportionally] of air .and-gasis secured for all adjustmentsi of the valve.

treated and in which Figure .1,- .1s:an elevation of a portion of an engine equipped with my valve and valve actuating devices. Fig. 2, is a ee spective view of the valve actuating mechan; ism, and Fig. 3, a vertical central section :through a valve and the parts immediately connected therewith. v

- A, indicates the bed plate A',' the housing for the main shaft, A the frame of the engine.

B,'indi'cates the gas engine cylinder abutting a ainst the frame, B B standards arrange at each end of the cylinder B B brackets secured to the side of the cylinder.

13*, is the piston rod.

K, K, are the admission valve casings, P, P,'theexhaust valve casings.

E, E, are slide guides secured on the brackets B .and formed with two parallel guideways, and also with brackets supporting pivot pins E, on which pivot pins are pivoted levers indicated at F, F-, and G, G those marked F, F being connected to actuate the admission valves, and those marked G, G, being connected to actuate the exhaust valves. I v

I, P, are cam blocks sliding in the guide ways E, and secured to rods H, H which, through rods H H", are connected to rock levers ll, H said levers being in turn con-' nectedby nods H 'H", 'wi'th cams H and of the engine,

H secured on a shaft I ,'Wl1l0ll is actuated through .gear wheels H, .H, shaft H and gears H H, by the main shaftv H, the eccentrics H, H, being-set at 90 apart, and the shaft :H being driven atone-half the speed of the main shaft. .The rock levers G, G, connect through rodsR,

with the exhaust valves Q, Q, the part Q, v

being a cylindrical guide-moving 1n the .guideway P of the exhaust casinglP, and

= .the valve proper indicated at Q,'.fitting on a:

removable seat P The special construction of. this exhaust valve formsthe subject matter of .my application for Letters Patent, filed March 7th, 1906, Serial Number 304,626.

The rock levers F, F connect through rods N with angle heads N, which may be f turned in .either direction with rock levers Thenaturcf my improvements will be best understood as described 'in connection wit-lithe drawings in which they are illus- N, vpivotedon the top ofthe standards .B", and connected at their other ends with the valve rods M, to the bottom of which rods are secured the valves M, each of which is adapted to seat itself on its seat K at the bottom of the inlet casing.

Beforegoing further with the description of the admission valve construction, Iwould state that the rock levers actuating the ad mission and exhaust valves are arranged alternately; that is to say, if .the first admission valve lever is actuated by a cam secured to the rod H, the next one will be arranged to be actuated by a cam secured to the rod H and so on, the same alternating arrange ment being also applied to the actuation of the exhaust valves. The valve actuating mechanism briefly described above forms the subject matter of my application for Letters Patent No. 238,917, filed December 30, 1904.

To return now to the mechanism of the admission valve, it will be seen that-the valve casing K, is formed with an air chamber K,

and a gas chamber K and has fitting into it a seat portion K provided with seats as.

;K indicates the cover of the' casing through which the sleeved valve;ste1n L, having securedto it the mixture controlling valve having the valve portions, one indicated at L, and adapted to seat itself on the seat- K and the other indicated at L made in the formof a cylinder valve and adapted to close the port indicated at K. Through the sleeved stem L, extends the valve rod M.

The stem M, as already stated, is secured to one end of the lever N, on which lever is secured a grooved segment N O, is a lever arm, one being coupled to the top of each sleeved stem L, the levers being pivoted on shafts 0, having squared ends movable in guide slots 13, formed in the standards B The levers O, are connected by links O with slides 0 moving inthe slotted segments N the links being connected through rods O", and lever arms 0 with a longitudinal running shaft 0 supported in the standards B and coupled, through arms and links indicated at O to be actuated by a governor 0 It will be seen that the valves M, being directly connected through the mechanism described with the valve actuating levers which are actuated by the sliding cams, Will always move in a fixed relationship to the motion of the actuating eccentric, and it will also be seen that when the parts are in the position shown in Fig; 3, that is to say, when the slide 0 stands directly above the connection of the link 0 with the link 0, the sleeved stem L, and the valves L, L will move positively and in fixed'relationship to the motions of the valve M, all the valves opening and closing simultaneously.

The regulation of the admission in this construction of valve is accomplished through the action of the governor which, by turning the shaft 0, shifts through the lever 0 and link 0*, the position of the slide the movement of the slide toward the right necessarily effecting through the connections with the sleeved stem L, the relative opening and closing of the valve L, and L with reference to the movement of the valve M; but'irrespective of the cut-oft, it is obvious that this construction 'of valve admits always a similarly proportioned mixture of air and gas to the cylinder with the advantages means actuated by the governor of'the engine and acting to adjust said connection to vary the motion of the throttle valves with reference to valve M.

2. Ina gas engine, an inlet valve M, having a stem M, and means for actuating the valve through said stem in fixed relation to the movements of the engine, in combination with a sleeve stem L. movable on stem and positively coupled to the actuating mechanism of said stem byadjustable connections, means actuated by the engine governor for shifting said adjustable connections, and throttle valves for the air and gas supply, connected to stem L, as specified.

3. In a gas engine, an inlet valve, a pivoted operating lever for the valve, means for turning said lever about its fulcrum in definite relation to the movements of the engine to open and close said inlet valve. a mixture controlling valve. a governor, and means controlled by the governor for positively coupling said mixing valve to said lever at varying distances from the lever fulcrum in response to variations in the speed of the engine.

GUSTAV B. PETSCHE. 'itnesses AnxoLD Ka'rz. D. STEWART.

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