US1919277A

US1919277A - Internal combustion engine

Info

Publication number: US1919277A
Application number: US548167A
Authority: US
Inventors: Herbert C Edwards
Original assignee: Packard Motor Car Co
Current assignee: Packard Motor Car Co
Priority date: 1931-07-01
Filing date: 1931-07-01
Publication date: 1933-07-25
Anticipated expiration: 1950-07-25

Description

July 25, 1933. v Q EDWARDS 7 1,919,277

T D STATES Patented July 25, 19331 HERBERT C. EDWARDS, OF DETROIT;v MICHIGAN ASSIGNORTO PACKARD MOTOR CAR. 1

COMPANY, OF DETROIT, MICHIGAN, A CORPORATIQN'OF MICHIGAN INTERNAL COMBUSTION ENGINE Applic t n filed July 1, 1931. SerialNo. 548,167.; p

thereof, and to adequately fill thecylinder.

Ordinarily, when the intake port extends through the head of a cylinder the valve stem traverses a portion of the intake passage,

and the usual form of circular valve stem terferes to some extent with the flow of the air into the cylinder so that the desired direction of flow is disturbed and the'volumeof air which can be drawn throught the passage in a given time during the engine operation is reduced.

An object of the invention is to overcome the above objections to'the usual form of valve mechanism, whereby the same is formed to offer minimnm'resistance to air flow passing into the cylinders.

Another object of the invent'on is to provide an engine with a valve inecha nismwhich is stream -lined where it traverses the intake passage.

A further object of the invention is to stream-line the valve stem bearing sleeve so that the portion thereof proj ectinginto the air inlet passage will offer a minimum resistance to the flow of air.

Still another object of the invention is to provide an engine valve having a stem which is stream-lined. Other objects of the invention will appear from the following description taken in connection with the drawing, which forms apart of this specification, and in which:

Fig. 1 is a vertical sectional view of the upper portion of a cylinder having my invention associated. therewith;

F g. 21s a sectional viewof the same taken onhne 22 of Fig. 1;

increasing the heat transfer surface thereof;

v Fig. isanothersectional view of the same taken on line 33 of Fig. 1.

' Referring nowto the drawingby characters of reference, 10 indicates one ofthe Q i c 5' the Dlesel or compression-ignit on type havcylinders of an internal combustion engine of ing anend wall .or dome 11 formed integrally therewith. A. head 12 detachably secured by bolts-13 upon the dome, and both the cylinder and the head are formed with fins tor -Within the cylinder is mounted a recipro} cable piston 1&1, and pivotally associated with the piston is a' connecting" rod 15' conven-f y tional type.

extends through the dome and'the head at an .i Asubstant1ally straight Ventur1 passage 16 angle to the axis of the cylinderand tangentially of the inner wall thereof 1 This passage, in the present instance,s erves as the air inlet and as the exhaust outlet; however,

duplicate passages and valve mechanism of f the character shown and described can be em ployed. At the inner end of the fixed a hardened valve-seat 17.1

The stem 18*of poppet valve extends through a portion ofthe head andthe dome,

and thelhea'd 19 of the valve is mova ble in 'teriorly' of the cylinder and adapted to engage the seat member 17. The valve stem passage is' .75

traverses the inner end of the passage 16 and is mounted in a-bearing sleeve 20 which is I carried by the head andalso partially traverses the passageway. 1 i I Y Y a In the present invention, the valve is open during'the air intake and exhaust strokes and is closed during the compression and working strokes of the piston, it being understood that the engine is of the four-cycle type.

Spring means as indicated at 21, arranged in thecylinderhead, normally maintain the valve'closed in the usu'al imanner and suitable'engine operated mechanism (not shown) I can-be employed for mechanically opening 1, the valve, such valve actuating mechanism being of any conventional character.

Extending through the wall of the cylinder is afuel injection nozzle 22 which is arranged to project. atomizedliquid fuel under high pressure into the compressed air charges cause uniform intermingling to produce a mixture which will readily ignite by the heat of compression,

Ordinarily, the sleeve 20 and the valve.

stem 18 are circular in cross section and in this instance they are of such form except for that portion which projects I into or through the passage 16, and it isobvious that there will be interruption of the air flow tending to disrupt the stream movement thereof so as to interfere somewhat with the rotational direction of flow in thecylinder,

and also that there is a certain reduction caused thereby, of the volume of air which can be drawn through the passage during the suction stroke'of the piston; In order to reduce such conditions to a minimum, I propose to stream-line that portion of the sleeve and the valvestem which projects into or through the passage 16. Preferably the portion 23 of the sleeve is made of a reduced.

1 diameter transversely of the direction of the air flow and the ends thereof are rounded to present a stream-line effect. Likewise, a

portion 24 of thevalve stem adjacent the 7 head which protrudes beyond the hearing when the valve is wide open is reduced in diameter transversely of the direction of the air flow to present a stream-line section. Both the stream-lined portions of the sleeve and the stem extending-into the passage 16 present a narrow width to the air flowing into the cylinder through the' passage and to theeXhaust flowingout of the, cylinder through the passage. This manner offormingthe valve stem and the hearing will ma 7 terially increase the-efliciency of the engine through an increase'in the air volume and decreased interference with the intended direction of the air flow.

Although the invention has been described 7 in connection with a specific embodiment,

the principlesinvolved are susceptible of numerous other applications which Will readily occur to persons skilled in the art. The

invention is therefore to be limited only as scope of the appended controlling flow through the passage, thestem portion of said valve traversing the aassap'e and bein of reduced diameter transversely of the direction of flow in the passage and stream-lined in form;

2. In an engine having apassage for the inlet ofair and the outlet of exhaust, a valve,

controlling flow through the passage, the stem of said valve traversing the passage and being flattened transversely of the opposite directions offlow in the passage 3. In an engine having a passage, a valve stem bearingsleeve partially traversing the passage, the portion of said sleeve extending into the passage, being flattened transversely of the direction of flow through the passage. I I

4. In an engine. having an air inlet passage leading to the interior of a cylinder, valve means traversing the passage, theportions of said valve means traversing the pas: sage being of reduced diameter transversely of the direction of air flow through the pas- I. v r i l l 5. In' an engine'having an air inlet passage extending through the head, reeipro cable valve in the head traversing the passage, and a valve stem bearing sleeve in the head partially traversing thepassage, the

portions of, the sleeve and stem in the pas sage being reduced indiameter transversely of the direction of an flow.

HERBERT o. EDWARDS.

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