US1197566A

US1197566A - Hydrocarbon-engine.

Info

Publication number: US1197566A
Application number: US57498510A
Authority: US
Inventors: Milton Tibbetts
Original assignee: Packard Motor Car Co
Current assignee: Packard Motor Car Co
Priority date: 1910-08-01
Filing date: 1910-08-01
Publication date: 1916-09-05
Anticipated expiration: 1933-09-05

Description

M. TIBBETTS.

HYDROCARBON ENGINE.

APPLICATION FILED AUG.1. 19m.

1,197,566. Patented Sept. 5, 1916.

. .3 SHEETSSHEET 1.

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M. TIBBETTS.

HYDROCARBON ENGlNE.

APPLICATION FILED AUG.1.1910.

Patented Sept. 1916.

3 SHEETS-SHEET 2.

M. TIBBETTS.

HYDROCARBON ENGINE.

APPLICATION FILED AUG. 1. 1910.-

1, 1 97,5 6 6 Patented Sept. 5, 1916.

3 SHEETS-SHEET 3.

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UNITED s ATns PATENT omen.

MILTON TIBBETTS, OF DETROIT, MICHIGAN, ASSIGNOR T0 PACKARD MOTOR CAR COMPANY, OF DETROIT, MICHIGAN, A CORPORATION MICHIGAN.

HYDROGARBON-ENGINE.

Specification of Letters Patent.

' To all cohom' it may concern Be it known that I, MILTON Trnnn'rrs, a citizen of the United States, and resident of Detroit, Wayne county, State of Michigan, have-invented certain new and useful Improvements in Hydrocarbon- Engines, of which the following is a specification.

This invention relates to hydrocarbon motors andparticularly to the ;.type'employing sleeve valves to'control the Operation thereof. In the present constructions of sleeve valve I motors, the valves 1 are mounted be tween the piston and the cylinder walls, and

therefore aresubject to hot gases and have not been effectively cooled and lubricated.

One of the objects of this invention is to locate the sleeves away from the combustion chamber, so that they are not subject to the direct action of the hot gases and may be effectively cooled and lubricated.

It is usual to operate valves of this type by eccentrics located in the crank case and connected to the valve'sleeves by connecting rods. It has also been proposed to operate the valves by an eccentric shaft on top of the cylinder. This latter method of operation is objectionable due to the noise and wearof the gears, at least two pairs of bevel gears .being required in order to transmit the motion from thecrank shaft to the shaft on top of the engine.

Another object of this invention therefore is to provide an operatingmechanism for the valves which will-not be open to the above objections.

Further objects will appear from the,detail description, taken. in connection with the accompanying drawings, in which Figure 1 is a vertical section through one.

of the cylinders of a motor embodying this invention; Fig. 2 is a vertical longitudinal section showing a multi-cy-linder motor; Fig. 3 is a section of a part of one of the cylinders of the motor, embodying another form of valve mechanism; and Figs. 4 and 5 are additional views illustrating the form shown in Fig. 3 I

In Figs. 1 and 2, the invention is shown as applied to a four-cylinder motor. In this type of motor, the cylinders are usually cast in pairs and bolted on a single crank case, in which operates the crank shaft. The crank case is composed of an upper section 10, an

intermediate section 11, and a lower action 12, which latter section forms the oil well in which the cranks of the crank shaft 13 dip for the purpose of lubricating the motor according to the splash luln'icating system. One of the cylinders is indicated in Fig. 1 by the reference character 14, and is provided with an extension 15 which is preferably contractcdso as to be of smaller diameter than the rest of the cylinder,.aud which forms a combustion chamber 16 of smaller diameter than the cylinder proper.- 'The cylinder wall is water jacketed as shown at 17 and communicates with the water jacket 18 in the head or contracted portion 15, the water jacket or water space 18 being separated from the combustion chamber. by a partition 19. The water is discharged from .the cylinder by means of a pipe 18. A piston QOreciprwates in the cylinder and is connected to the crank shaft by means of a connor-ting rod 21. A casino surrounds the contracted portion 15 ano forms therewith an annular valve chan'ibei'. Inlet and OX- liaust ports 23, 2-1 respectively, extend through the walls of the cylinder directly below the partition 19 as shown. and these ports'arc controlled by a pair of valve sleeves and 26, which slide onthe contracted portion 15 of the cylinder and connect the cylinder ports ith the inlet and exhaust manifolds. The outer valve sleeve 25 is provided with inlet and exhaust ports27 and 28 respectively, and the inner sleeve with inlet and exhaust ports 29 and '30 respectively; The contracted portion of the cylinder is provided with piston rings so as to make a good gas tight joint between the valve sleeves and the cylinder. The cylinder heads have each mounted upon .them a support 31 in which are mounted a pair of

shafts

32 and 36 which extend across the upper ends of the cylinders as shown 1n F ig. 2. The shaft 32 has mounted upon it a pair of arms 33 which connect by links 3% with cross bars 35 connected to the outer sleeve of cylinder 1 and inner sleeve of cylinder 2, and a pair of arms 33 which have asimilar connection .to inner sleeve of cylinder 3 and outer sleeve of cylinder 4. A pair of arms 37 on shaft 36 have a similar connection with the inner sleeve of cylinder 1 and outer sleeveof cylinder 3, and a pair of arms 37 have a similar connection with the outer sleeve of cylinder 2 and the inner sleeve of cylinder 4-. The

rock shafts

31 and 32 have secured theretoa pair of arms and 39 connected by links. 40 and 41 with eccentrics 42 and i3. These e entries are Patent-ed Sept. 5, 1916.

displaced 90 and are mounted upon an eccentric shaft which is driven from the crank shaft by a two-toonc chain gearing, so as to drive the eccentric shaft at half speed, This construction is shown in detail in Fig. 2, and diagrannnatically in Fig. 1. The casing is provided with a flange 15 which is bolted to a shoulder -16 011 the cylinder, and is further provided-with a cover plate 47. The

arms

38, 39 and the connections to the eccentric shaft including the chain gearing, are preferably inclosed by a housing 48, which may be integral with one pair of'eylinders and with the crank case. The annular valve chamber formed between the casing 522 and the extended part of the cylinder 15 is supplied with oil through the pumping action of the sleeves in connection with the inlet pipe 49 leading from the lower part of the crank case and having a check valve 49 therein, and the outlet or overflow pipe .50 leading to the crank ease and having a check valve 5O which permits the oil to flow outwardly but not inwardly.

The operation of the'valve sleeves will be obvious, the ports in the sleeves operating to control the motor on t 1e four-stroke cycle, and in the order 1-2-43. The valve sleeves are located outside of the cylinder and out of direct contact with the hot gases in the cylinder and the combustion chamber, and a water jacket is interposed between the entire intervening space between the cylinder and the sleeves. This insures that the valve sleeves will be kept cool, preventing sticking due to expansion, etc. By contracting the head, the total diameter of the cylinder is not increased beyond. the normal, and thus the cylinders can be placed close together which desirable especially in motor vehicle practice.

in, view of the fact that the eccentrics are placed 90 apart, it is possible to operate all the valves of a four cylinder motor with two rock shafts, and the practically direct connection between the eccentrics and the rock shaft by means of the links will obviate the noise and w var of the bevel gears present in the prior constructions.

In the operation of the motor, in view of the fact that the 'alve sleeves are less than 180 apart, the atmosphere in the annular valve chamber below the valves will be alternately rarefied and compressed. The sleeves will therefore operate as a pump to pump the oil from the crank case into the valve chamber. The pipe 50 acts as an overflow pipe.

Figs. 3, l and 5 show a construction in which the casing .22 itself is water jacketed, and in which a single port performs the functions of both inlet and exhaust ports so that the total port area; an be a maximum. The casing surrounding the valve sleeves is here indicated by 60, andthe water jacket effect constitutes an extension thereof. The

contracted upper or head portion 15 of the cylinder is of similar construction to that shown in Fig. 1, except that in this case the cylinder, that is the contracted portion thereof, is provided with a single set of ports (33 which extend practically entirely around the cylinder, the upper portion containing the partition 19 being supported from the main portion of the cylinder by a series of ribs (3? or in any other suitable manner, The inner and outer valve sleeves are provided with

ports

64 and 65 which also extend practically around the entire cylinder, the parts of the sleeve being connected by portions (94 and (55. The upper end of the outer sleeve is enlarged at 66 so as to form a space 67 between the sleeves. The valve casing 60 is provided with inlet passages 68 and exhaust passages (59, connected with the inlet and exhaust manifolds respectively. When the valves are in the positions shown in Figs. 3 and 4, the interior of the cylinder will be in communication with the exhaust manifold, while when the valves are in the position shown in Fig. 5, the interior of the cylinder will be in communication with the inlet manifold. The sleeves are operated at approximately 90 apart and therefore the single port in the inner sleeve is always moving past the eylinder port at the time the outer sleeve is in its two extreme positions. It will thus be seen that with this construction a single cyl inder port performs the function of both inlet and exhaust ports, and therefore the opening of this port can be a maxinulm since it extends practically entirely around the cylinder, thus providing for a .maximum admission of the chargeand the quick and perfect exhaust of the burnt gases, and thereby increasing the power and elliciency of the motor. Fig. 3 shows at 70 an igniter plug and the method of mounting the same in the cylinder. i

It is obvious that various changes may he made in the details of construction without departing from this invention, and it is therefore to be understood that this invention is not to be limitedto the specific con-- struction shown and described.

Havin'g thus-described the invention, what is claimed is:

1. In a hydrocarbon motor, thecomliinationwith a crank shaft and .a p'lurality of cylinders located in line, of valve sleeves for saidcylimlers, a air of rock-shafts extending across the tops of said cylinders and con nected'to operate said sleeves, and ,means for tion with a crank shaft and a plurality of cylinders located in line, of 'a pair of valve sleeves for each cylinder, a )air of operating shafts extending across. t 'e tops of said cylinders, means operatively connecting each; of said shafts with one valve sleeveof each of said cylinders, and means for operating said operating shafts from saidmrank shaft;

3. Ina hydrocarbon moton'the combination with four cylinders thereof and a crank shaft, of a plurality of sliding valves for each cylinder, a pair of rock shafts mounted on the upper parts of the cylinders, connections from said rock shafts to the valves of the four cylinders for operating said valves,

and -means for operating the. rock shafts from the crank Shaft.

4. In a hydrocarbonmotor, the combination with four cylinders thereof and a crank shaft, of a plurality of sliding valves for each cylinder, a pair of rock shafts mounted on the upper parts 'of the cylinders, connections from said rock shafts tothe valves of. the'founpylinders for operating said valves,

the rock shafts from the crank shaft.

5 6. In a hydrocarbon motor,' the combina tion with a cylinder having a single inlet and outlet .port, of valve sleeves surrounding the upper end of the cylinder and controlling the inlet and outlet of gases throughsaid port, and a piston. operating in said cylinder below said sleeves. v

7. In a hydrocarbon motor, the combination with a cylinder having a contracted portion and a single inlet and outlet port in said portion, of a piston in said cylinder below saidportion, and valve mechanism for controlling thel inletand outlet of gases through said port finclu'ding a valve sleeve.

engaging said portion. p x

8. In a hydRQcarbon motor, the combination with a cylinder having a contracted head and a single inlet and outlet port therein, of valve sleeves surrounding said head and controlling the inlet and outlet of gases through saidport, and a piston operating in said cylinder. v

9. In a hydrocarbon motor, the combination with a cylinder having a contracted portion, of a piston in said cylinder below said portion, a casing surrounding said portion and forming therewith an annular va-lve' chamber, valve mechanism including a valve sleeve in said chamber, a crank case, an oil conduit connecting said crank case and chamber, and means for operating said valve sleeve. 4

10. In a hydrocarbon motor, the combination with a cylinder, of valve sleeves surrounding the upper end of the cylinder, a piston operating in the cylinder entirely below the sleeves, and a detachablev water 1 jacketed casing of no greater diameter than the cylinder surrounding said sleeves.

11. In a hydrocarbon motor, the combination with a cylinder having a contracted portion, of a. piston in said cylinder below said portion, a detachable water jacketed casing surrounding said portion and forming therewith an annular valve chamber, the diameter of the outer wall of which is less than the outer diameter of the cylinder wall,

and valve mechanism including a valve sleeve in said chamber.

12. In a hydrocarbon motor, the combina- --tion with a cylinder having a contracted portion of-a piston in said cylinder below said portion, a casing surrounding said portion and forming therewith an annular valve chamber, valve mechanlsm lncludmg a valve sleeve in said chamber, means including said valve sleeve as an active element for lubrieating the bearing surfaces w1th1n said valve chamber, and means for operating said valve sleeve.

13. In a hydrocarbon motor, the combina-.

tion with a plurality of cylinders each comprising a portion in which t'e-piston operatesand two cylindrical portions arranged concentrically above the piston portion and one of which forms an integral extension of the piston portion and the other of which is detachably secured to the piston portion making a tight joint therewith, said cylindrical portions being separated from each other to form an annular valve chamber therebetween, and said cylindrical portions having cooperating ports, of a sleeve valve arranged in said annular chamber and adapted to control said ports, an operating shaft common to two or more of said cylinders, bearings for said operating shaft on the said integral cylindrical portion of said cylinders, and connections from said shaft to the valves of two or more, of said cylinders for operating the valves, and meansfor actuating the shaft from the motor crank shaft.

In testimony whereof I afliX my signa ure in presence of two witnesses.

MILTON TIBBETTS.

' Witnesses: I

W. H. F INCKEL, Jr., C. J. DALE.