US1711882A

US1711882A - Internal-combustion engine

Info

Publication number: US1711882A
Application number: US235952A
Authority: US
Inventors: Fornaca Guido
Original assignee: Individual
Current assignee: Individual
Priority date: 1927-08-23
Filing date: 1927-11-26
Publication date: 1929-05-07
Anticipated expiration: 1946-05-07

Description

May 7, 1,929. G. FoRNAc'A 1.711,882

INTERNAL ,coMBusT'IoN ,'ENGINE Filed Nov. 2e, 1927 I2 sheets-sheet 1r ru/fia 2i ern, a. a

May 7, 1929. G. FORNACA 1,711,882

INTERNAL COMBUSTINA ENGINE Filed Nov. 26, 1927- 2 Sheets-'Sheet 2 UNITEDj STATI-3s PATENT oFFlcE.

omino romance, on TURIN, ITALY.

INTERNAL-COMBUSTION' ENGINE.

Application led November 26, 1927, Serial No. 285,952, and in Italy August 28,1987.

This invention relates to valve gearings for engines having several groups of cylinders, said groups being located side by side, parallel with each other and having each a crank y 5 shaft, which crank shafts are parallel with each other. In engines of this kind the several crank shafts are interconnected by a toothed gearing including a member which transmits the driveto a -driving shaft orto a propeller or the like, in motor cars, aircraft, and the like.

' The invention has for its obj ect to provide an engine of the kind above referred to,.in which the cylinders of two adjacent groups i5 are arranged in such a manner that the valves of the same character (as inlet valves) in the cylinders of said4 adjacent groups face one another.` Between said facing valves is mounted a cam shaft which operates the said valves of like character in both groups of cylinders; the valves of other character being located on the remote sides of the cylinder groups and being controlled by another common cam shaft.

Moreover, in the present invention the cam shaft serving twogroups of cylinders comprises a number of cams which equals the number of cylinders of a-single group, and all the cam shafts of the engine are identical with one another and consequently are interchangeable.

In the accompanying drawings is illustrated by way of example one embodiment of this invention and Figure 1 is a cross section of the engine;

Figure 2 is a diagram of the drive of the cam shafts;

Figure 3 is a diagram of the arrangement of the parts of the engine. Y v

In the embodiment illustrated, the-engine comprises two parallel groups of cylinders I--II having their axes parallel with each other,l said cylinders being arranged in line on a common crank casing 22; each group 46 comprises six parallel and aligned cylinders and has a

crank shaft

23, 24 with six cranks at 120 each other.

The crank shafts 23-24 are connected by In accordance 4with this invention, the cylinders of the left hand'G'rou' I have'their valves 7 of one character Fas their inlet valves) on the right side, while the inlet valves 7 of the right hand Group II of cylinders are located on the left side,'the being 60 thus close to and infront of valves-7 of the cylinders of Group I.

Intermediate said valves and cooperating therewith 'is arranged a cam shaft 8 comprisingsix cams 10, and each of these cams operates the inlet valves of adjacent cylinders of said two groups, the axis of the valves of like'. character in the adjacent cylinders of adjacent and parallel groups being located in the same transverse plane (see cylinders Fig. 3).

This result is obtained in this engine (which is assumed tobe a four-stroke cycle one,'with ignition taking place in the order 1--1'--22'33'4L-4'-55'f-6-6' (Fig. 3)) by arranging rocking arms 9'-9" in such a manner that the phases of the valve of one of the cylinders of the transverse pair are displaced through with respect to the phases of the valve of the other cylinder of the same pair.l The cam shafts 11', 11" which `operate rocking arms 13', 13" of the exhaust ,valves 14:', 14, comprise cams 15', 15 having the same phase and extent as cams 10 of shaft 8, and the three shafts 8-11'11" rotate in the same direction, being driven from shaft 16 by

gearings

17', 18, 19, 20', 21', 20", 21" consequently the three cam shafts 8 90 11'-11" are alike and they may be replaced one by another, this being ofcourse a great advantage in practice.

The described arrangement .may of course be embodied in engines having more than two g5 groups of cylinders;l in such case, in the sev-- eral pairs ofl cylinder groups the adjacent valves have the same function and they are operated by a single intermediate cam shaft,

the external .sets of valves being operated each by a separate cam shaft.

What I claim as my invention and desire to Secure by United States Letters Patent` 1s:- l v 1. An engine comprising a plurality k.of groups of cylinders, said cylinders being parallel and aliofned in each group and-the several lgroups being parallel and adjacent to each other, valves in said cylinders, the valves of the same character being provided parallel and aligned in each group and the several groups being parallel and adjacent to each other, valves in said cylinders, the valves of the same character being provided in portions of cylinders of said groups facing each other, a cam shaft arranged intermediate each pair of adjacent groups and yactuating said facing valves, saidcam shaft havin a number of cams equal to the number o cylinders of a single group, the other valves of the cylinders being located in portions of the cylinders which are remote from each other, and a cam shaft for each set of last named valves.

3. An engine comprising a plurality of groups of cylinders, said cylinders being parallel and aligned in each group and the several groups being parallel and adjacent to each other, valves in said cylinders, the valves of the same character being provided in portions of cylinders of said groups facing each other, a cam shaft arranged intermediate each pair of adjacent groups and actuating said facing valves, said cam shaft havin a number of cams equal to the number o cylinders'of a single groupand each of Said cams operating the facing of two transversely aligned cylinders of said groups, the other valves of the c linder being located in portions of the cylin ers which are remote from each other, and a cam shaft for each set of last named valves.

4. An engine comprising a plurality of groups of cylinders, said cylinders being lparallel and aligned in each group and the several groups being parallel and adjacent to each other, valves in said c linders, the valves of the same character being provided in portions of cylinders of said groups facing eachother, a cam shaft arranged intermediate each pair of adjacent groups and actuating said facing valves, the other valves of the cylinders being located in portions of the cylinders which are remote from each other, a cam shaft for each set of last named valves, and means driving all said cam shafts in ythe same direction. f

5. An engine comprising a plurality of groups of cylinders, said cylinders being parallel and aligned in each group and the several groups being parallel and adjacent to each other, said cylinders having like inlet and exhaust phases, valves in saidcylinders, the valves of the same character being provided in portions of cylinders of said groups facing each other, a cam shaft arranged intermediate each pair of adjacent groups and actuating said facing valves, the other valves of the cylinders being located in portions of the cylinders which. are remote from each other, a cam shaft for each set of last named valves, all said cam shafts being interchangeable with one another, and means driving all said cam shafts in the same direction.

6. An engine comprising a casing, a plurality of rows of cylinders on said casing, the cylinders of each row being parallel with each other and said rows being arranged in parallel lines on said casing, a crank shaft for each of said cylinder rows, pistons in said cylinders and rods connecting the pistons of the cylinders-of one of said rows with the cranks of the respective crank shaft, valves in said cylinders, the valves of the cylinders of one row having the same character as the valves facing them in the cylinders of an adjacent parallel row, a cam shaft intermediate each pair of cylinder rows and having cams actuating said valves of the same character, the other valves of the cylinders being located in the remote portions of the rows of cylinders, cam shafts each actuating the last named valves of a cylinder row, and driving means ihtergearing said cam shafts and crank shafts.

7. An engine comprising a casing, a plurality of rows of cylinders on said casing, the cylinders of each row being parallel with each other and said `rows being arranged in parallel lines on said-casing, a crank shaft for each of said cylinder rows, pistons in said cylinders and rods connecting the pistons of the cylinders of one row with the cranks of-the respective crank shaft, valves in said cylinders, the valves of the cylinders of one row having the same character as the valves facin them in the cylinders of an adjacent paral el row, a cam shaft intermediate each pair of cylinder rows having cams actuating said valves of the same character, the other valves lof the cylinders being located in the remotel portions of the rows of cylinders, cam shafts each actuating the last named valves of a cylinder row, and driving meansintergearing said cam shafts and crank shafts.

8. An engine comprising a casing, a plu-l rality of rows of cylinders on said casin the cylinders of each row being parallel wit each other and said rows being arranged in parallel lines on said casing, a crank shaft for each of said c linder rows, pistons in said cylinders and ro s connecting the pistons of the cylinders of one row with the cranks of the respective crank shaft, valves in said cylinders, the valves of the cylinders of one row having the same character as the valves facing them in the cylinders of anv adjacent parallel row, a cam shaft intermediate each pair of cylinder rows having cams actuating said valves of the same character, said cams being equal in number to the number of cylinders of a single row, the other valves of the cylinders being located in the remote portio`ns of the rows of cylinders, cam shafts each actuating the last named valves of acylinder row, and driving means intergearing sald cam shafts and crank shafts.

9'. An engine comprising a casing, a plurality of row of cylinders on said casing, the cylinders of each row being parallel with each other and said rows being arranged in inders, the valves of the cylinders of onerow having the same character as the valves facing them in the cylinders of an adjacent parallel row, said cylindershaving like inlet and exhaust phases, a cam. shaft intermediate each pair of cylinder rows having cams actuating said valves of the samecharacter, the other valves of the cylinders being located in the remote portions lof the rows of cylinders, cam shafts each actuating the last named valves of a cylinder row, and means intergearing said cam shafts and crank shafts to drive all said cam shafts in the same direction, all said cam shafts'being interchangeable with one another.

10. An engine comprising a casing, a plurality of rows of cylinders on said casing, the cylinders of -each row being parallel with each other and said rows being arranged in parallel lines on said casing, a crank shaft for each of said cylinder rows, pistons in said cylinders and rods connecting the pistons of the cylinders of one row with the cranks of the respective crank shaft, valves in said cylinders, the valves of the cylinders of one row having the same character as the valves facing them in the cylindersof an adjacent parallel row, said cylinders having like inlet and exhaust phases, a cam shaft intermediate each pair of cylinder rows having camsactuating said valves'of the same character,y

said cams being equal in number to the number of cylinders of a single row, the other valves of the cylinders being located in the remote portions of the rows of cylinders, cam

f shafts each actuating the last named valves of a cylinder row, and means intergearing -said cam shafts and crank shafts to drive, all said cam shafts in the same direction, all

said cam shafts being interchangeable with one another.

11. An engine comprising a casing, two rows each of six cylinders on saidcasing, the

Vcylinders in each row being parallel with each other and said rows being arranged in parallel lines on said casing, a crank shaft for each cylinder row and pivoted in said cas-y ing, said crank shafts having each six cranks at 120 apart, pistons in said cylinders and rods connectingl the pistons of the cylinders of each row with the cranks of the respective crank shaft, valves in said cylinders, the valves of thecylinders of one row having the same character as the valves facing them in the cylinders of the adjacent parallel row, said cylinders having like inlet and exhaust phases in both rows and the phases of operation of said valves being displaced'GOo from one another, a cam shaft intermediate said cylinder rows having six cams at 60 apart and actuating said valves of the same character'in both rows of cylinders, the other valves of the cylinders being located in the remote sides of the cylinders of said rows, cam shaftseach havingsix cams at 60 apart and actuating the last named valves of one of said rows, and means intergearing said cam shafts and crank shafts to drive all said cam shafts in the same direction, said cam shafts being all interchangeable with onev` another.v

In testimony whereof I aliix my signature.

GUIDO FORNACA.