US2001854A - Engine cylinder block - Google Patents

Description

May 21', 1935. F. G. SHOEMAKER ET AL 2,001,854

` v ENGINE CYLINDER BLOCK Filed April 5, 1935 4 Sheets-Sheet 1 gru/vented ENGINE CYLINDER BLOCK Filed Aprils, '1953 4 sheets-'sheet 2 juzga? 6717/ May ,21, 1935. F. G. SHOEMAKER ETAL ENGINE CYLINDER BLOCK Filed April 5,l 1935 4 SheetsfS'neet 3 May 21, 1935. F. G. sHoEMAKER Er AL. 2,001,854

ENGINE CYLINDER BLOCK Filed April 5, 1935 4 Sheets-Sheet 4 Patented May 21, 1935 UNITED ySTATES PATENT oFEicE ENGINE CYLINDER BLOCK Application April s, 1933, serial No. 4,505

1o claims. (C1. 12s-11s) This invention relates to built up engine cylinder blocks consisting oi' parts which can be simply and cheaply produced and assembled and supported upon each other preferably by press nts so as to be self holding in one complete assembly adapted to be soldered, welded, or brazed into a single whole.

More particularly, 4it relates to such cylinder blocks for engines having ports in their cylinder walls for the ilow of uid into or out from the cylinder, and still moref particularly to a U-type two-cycle internal combustion engine.

Each cylinder is as far as possible a complete unit in itself adapted for combining into a single or multi-cylinder block of any desired number of cylinders with the use of only a few additional parts such as suitable top and bottom plates or deck anges connectingl any required number of cylinders together.

One object of the invention is the construction of engine cylinder blocks of the foregoing type having known advantages of lightnessv in weight resistance of the walls between the port conduits.

to the flow of iluid through the port conduits by the provision of streamline fairing pieces therefor.

Another object of the invention is suitable provision for cooling the streamline fairing pieces which are exposed to the hot exhaust gases and which'form part of a port chamber which is itsel! water cooled and encloses the port conduits.

A further object of the invention is-to provide water inlet means for the water jacket o! each cylinder at diametrically opposite sides thereof throughthe lower hold down flange of the cylinder block. 4

A still further object oi.' the invention is to construct a ribbed'upper or. top deck ilange for a cylinder block which, while thin and capable ot being efficiently cooled, is adequately strong.

The above and other objects of the invention are hereinafter described in 'conjunction with the accompanying drawings which show the application of the invention to the two complementary cylinders having a common combustion chamber oi a U-type two-cycle internal'combustion engine injwhich the cylinders are united by a suitable upper deck ange towhich the cylinder head is attached and a lower hold down flange. are provided with separate water jackets for each cylinder barrel, are provided with 'water cooled ports with streamline iairing pieces to lead the gases through the ports and have port chambers enclosing the iairing pieces through which the gases are led into or out from the ports.

' In the drawings: t

Figure l is a sectional elevation of the two complementary .cylinders complete with cylinder head.

Figure 2 is a section on line 2-2 oi' Figure 1. y

Figure 3 is a perspective view oi the underside oi the upper or top deck ange.

Figure 4 is a perspective view of the upper end of a cylinder barrel.

Figure 5 is an exploded perspective view of the intake port chamber. l

Figure 6 is a perspective view ot the intake port iairing pieces.

Figure 'I is a perspective view oi' the exhaust port chamber with tubular fairings for the cylinder port conduits.

Figure 8 is an. elevation of the exhaust port chamber water Jacket.

Figure 9 is a part sectional, part end elevation of the cylinder block showing the lower end of a cylinder barrel complete with the lower hold down flange, the water jacket, and water inlet connections therefor.

VThe two cylinder barrels I and 2 which may be termed inlet'and exhaust cylinders respectively are machined from steel tubing.

' 'Ihe outer circumference of the inlet cylinder barrel I vis turned with a shoulder 3, a thin ilange 5, a thicker section T and a shoulder 9. 'I'he exhaust cylinder barrel is turned correspondingly with a shoulder t, a thin tlange I, a thicker section l and a shoulder il. All other unnecessary material on the outer circumference of the cylinder barrels is machined away leaving strengthenmg ribs Il. Y

The thicker sections 'i and I forming integral sleeve portionsconstitute the necessary stock in which to form the port conduits I 3 and Il for the cylinder barrels i and 2 respectively. These thicker sections 1 and l partition the annular space between each cylinder barrel and its surrounding water jacket. Between the port conduits il ot the inlet cylinder barrel i grooves Il are milled in the thicker section sleeve portion The exhaust port conduits Hl are milled di rectionally as shown in Figure 2 togive easy egress of the exhaust gases in the outlet direction.

'Ihe thin anges 5 and t are notched out as shown in Figure 4 toprovide passageways for the flow of water as will be later described.

The forged hold down iiange l'i common to the two vcylinders and provided with bolt holes such as it is slipped over the lower ends of the two cylinder barrels and pressed up against the shoulders 9 and lil onthe cylinder barrels i and 2 respectively. -Circumferential shoulders i9 and 2U are provided on the hold down flange ii.

The water jackets 2@ and 2i for the cylinder barrels i and 2 are made from steel tubing machined inside and out. These Water jackets which are provided with port openings 22 and 23 coincidental with the openings of the port conduits i3 and ii on the outer circumference of the cylinder barrels are press tted over the sleeve portions 1 and 8 and the flanges 5 and d.

The inlet port chamber 3d is lformed of two lap jointed halves 25 and 2li consisting of sheet steel stampings as shown in Figure 5. This port chamber is press fitted. over the inlet cylinder water jacket 29.

Inserted in the port chamber are two segments 2 and 28 of a. ring l'iaving ports 29 to coincide with the cylinder port conduits and having a conformation. such as' to provide fairings for those parts of the cylinder Wall or the water jacket surrounding and between the port conduits enclosed by the 'port Vchamber for the smooth streamline directional flow of the charge through the port chamber -into the port conduits. These port fairing pieces are conveniently formed of cast aluminum and are held in their proper position in the inlet port chamber by any suitable means. They may be pinned through the port chamber..

The exhaust port chamber 30 is similarly formed of two lap jointedhalves 3i and 32 with punched holes 33 in each half connected by tubular fairing pieces 34. Thesefairing pieces are subjected to the ,heat of the hot exhaust gases, hence the need for water .cooling of the fairing pieces. The tubular fairing pieces 34 are press tted over the vertical sides of the punched holes 33 which form a plug and socket joint with the tubular fairing. pieces.

A water jacket 34 for the exhaust port chamber 30 is similarly formed of two lap jointed halves enclosing the exhaust port chamber. Both the exhaust port chamber and the water jacket are press fitted over the exhaust cylinder water jacket 2|.

Holes 40 in the cylinder water jacket 2| above and below the exhaust port chamber 30 serve as inlet and outlet portsfor the-ow of water be' tween the water space around the cylinder barrel and the water space around the port chamber.

- 'I'he inletport chamber!! is slipped over the inlet cylinder-water jacket 20. and located in its proper position againsta shoulder 35 thereon. The exhaust .port chamber 3,0 along with its water jacket 34' is slipped over the exhaust cylinder water jacket 2l and located in its proper position against a shoulder 36 thereon.

The water jackets complete with their port chambers are next slipped down over the flanges 5 and 6, the sleeve portions l and 8, and onto the shoulders i@ and 20 on the hold down flange il.

A water jacket extension piece 31 is next slipped over the upper end of the water jackets 20 and 2i and against shoulders 38 and 39 thereon. This water jacket extension piece forms the top closure of the water jacket between the cylinder water jackets and the upper deck ange IH, the water flowing through ports formed by notches in the thin anges 5 and 6 as shown most clearly in Figure 4.

The upper deck flange is press fitted in the water jacket extension piece 3l and over the cylinder barrels i and 2, and is pressed into position against the shoulders .3 and i of the cylinder barrels.

Flanges l2 and i3 are press tted over the open ends of the inlet port chamber 2li and the exhaust port chamber 30 with its water jacket 34'.

The hold down flange l'i is provided with stepped down portions @Il along the sides of the cylinder block` at diametrically .opposite points of each cylinder barrel. Holes l5 are provided in this stepped down portion of the hold down flange. Water inlet port openings i6 are provided in the cylinder water jacket above the holes Q5.

Tubular water inlet conduits di carry the cooling water through the holes i5 in flange Il and through the port openings iii into the water jackets. The inlet conduits Lil are press fitted in the holes 35.

' By arranging the water inlet conduits through the hold down flange in the foregoing manner,

the joint between the cylinder block hold down flange and the crank case (not shown) may serve also as the joint between the water inlet conduits and a common rail water supply line (not shown) which may be formed in the crank case.

As shown in Figure 3 the underside of the upper deck flange di, a steel forging, is provided with pockets i8 between the tapped stud holes is into which the studs for the removable cylinder head are screwed. The Vbridge portion between the two cylinder barrels is provided with strengthening ribs 50 and 5I. All the spaces and pockets on the underside of the flange function as water cooling spaces while at the same time they lighten the weight of the flange. Holes 52 in the bridge portion and in each pocket 48 serve for the ow of water from the water jackets of the cylinder barrels into the water jacket of the cylinder head- 53 which is provided with coincidental holes and has a water outlet 5d.

We claim:

1. In a built up internal combustion engine cylinder block a cylinder barrel, a top deck ange forming part of a combustion chamber, a Water jacket for the cylinder barrel, a closure for the water jacket at the combustion chamber end of the cylinder barrel consisting of a flange on the cylinder barrel', and ports in the ange for the ow of water from the water jacket of the cylinder barrel into a Water jacket extension piece connecting the water jacket of the cylinder barrel to the top deck flange and constituting a cooling jacket for that part of the top deck ange forming part of the combustion chamber.

formingva water jacket therefor, ports through the second named ilange for the owl of water from the water jacket o! the cylinder barrel to the water jacket of the top deck ilange, and port conduits through the walls of the cylinder for the flow of iluid into or out of the cylinder.-

3. In a built up engine cylinder block in combination, a cylinder barrel, a top deck ange for the cylinder head end and a hold down ilange for the other end of the cylinder barrel, a water jacket for the cylinder barrel, a ange on the cylinder barrel forming a closure i'or the water jacket at the cylinder head end, a water jacket extension piece connecting the water jacket of the cylinder barrel to the, top deck ilange and forming Ya. water jacket therefor, ports through the second named iiange for the ilow ot water from the water jacket ot'the cylinder barrel to l the water jacket of the top deck flange; port conduits through the walls of the cylinder for the flow of fluid into or out ofthe cylinder, and a port chamber enclosing the port conduits and adapted to secure the streamline directional ilow of iiuid into or out of the port conduits.

4. In a built up engine cylinder block in combination, a. cylinder barrel, a top deck iiange for the cylinder head end and a hold down flange for the other end of the cylinderbarrel. a water jacket for the cylinder barrel, a flange on the cylinder barrel forming a closure for the water jacket at the cylinder head end, a water jacket extension piece connecting the water jacket of the cylinder barrel to the top deck ilange and formingl a water jacket therefor, ports through the third named ange i'or the flow 'of water from the water jacket 'of the cylinder barrel to the water jacket of the top deck flange, port conduits through the4 walls oi.' the cylinder for the ilow o! iluid into or out of the cylinder, a port chamber enclosing the port conduits and adapted to secure the streamline 'directional ilow of iluid into or out of the port conduits, and a water inlet conduit ,for the water jacket ot the cylinder barrel throughthe hold down ilange.

5. In a built up engine cylinder block in combination, a cylinder barrel, a water jacket for the cylinder, forming cooling space therearound. a section of the cylinder barrel forming, together with a section of the water jacket, a partition for the cooling space, port conduits through ,-the partition, for the now of iluid into or out of the cylinder. channels in the partition -between the port conduits and closed by the water jacket, forming cooling spaces for'the cylinder barrel and the walls ot the port'conduits and providing for the ilow of the'cooling medium therethrough from the cooling space canone side ot the partition to the cooling space -on the other side of the partition. and means providing i'or the directional Ilow of fluid with a minimum resistance to the ilow thereof into or out oi the port conduits consistingoi a port chamber enclosing the port conduits and including fairings for those parts of the cylinder wall and the-water jacket surrounding and between the port conduits enclosed by the port chamber.

6. A built up engine cylinder block according to claim 5` in which iairings for those parts of the cylinder walls surrounding and between the port conduits enclosed by the port chamber are formed in a iairing piece inserted and suitably held in the port chamber.

7. A built up engine cylinder block according to claim 5 in which the port chamber is provided with a water jacket which takes in water from the cylinder water jacketl through holes therein above and below the port chamber and in which the fairings include separate pieces of tubular section which are cooled by themselves' forming conduits forthe flow of water through the port chamber from the lower to the upper side oi/ the 'water jacket of the port chamber.

8. Ina built up engine cylinder block in combination a cylinder, a water jacket for the cylin` Y der, a hold down nange on the cylinder block and a water inlet conduit for the water jacket through the hold down ilange.

9. In a built up internal combustion engine cylinder block, complementary cylinder barrels,

having a common combustion chamber, a top deck iiange uniting the cylinder barrels and i'orming part of the combustion chamber, separate water jackets for each cylinder barrel, a lower closure for the water jackets consisting of a lower h old' down ilange common to the cylinder barrels and an upper closure for each water jacket consisting of a flange on each cylinder barrel provided with ports for the now of water from the water jacket of each cylinder barrel into a water jacket extension piece common to the cylinder barrels connecting the water jackets of the cylinderbarrels to the top deck flange and constituting a cooling jacket for that part of the top deck ange forming part of the combustion chamber.

l0. In a built up internal combustion engine pockets for the flow of w/ater therethrough into the water jacket of the cylinder head.

G. snoEMAKER. l Gomma n. mamme.

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