US1796132A - Exhaust manifold - Google Patents

Description

Man-mhl 1`0,-l931. E. wALLER i 1,796,132

r EXHAUST MANIFOLD Filed Feb. 27. 1928 @@Mqgwgm.

Patented Mar. 10, 1931 UNITED STATES PATENT OFFICE EINAR WALLER, or DETROIT, MICHIGAN, AssIGNOR To GENERAL MOTORS CORPORA- TION, or DETROIT, MICHIGAN, A CORPORATION or DELAWARE DxRAUsT MANIFOLD Application led February 27, 1928.

, This invention relates to manifolds used on internal combustion engines and has particular reference to a device for heating the carbureted fuel mixture before it enters the firing chamber.

Prior heating arrangements have made use of a baffle and a single valve to direct more or less of the hot exhaust gases of the exhaust manifolds to a spot on the intake manifold or to a riser which extends from the carburetor past the exhaust manifold to the intake manifold.

It has been customary to direct a portion of the exhaust gases toward this hot spot or riser, but as far as I am aware no prior construction has taken all of the exhaust gases controlled by a plurality of valves and directed all or a part of them vagainst the riser atk the center of the manifolds. With the present arrangement it is possible to direct either half'orl all of the exhaust gases directly against the riser tol cause a preheating.

This .is vof advantage when the outside temperature becomes cooler for at times it is desirable to direct but a lportion, of the exhaust gases-against the riser, while at other times all theexhaust may be utilized.

The object of the invention is accomplished trally longitudinally of the exhaust manifold and which has for its object to conduct away the exhaust gases to the exhaust tube when the valve is across the manifold. The two valves are independently operated and it is accordingly possible to have one valve across the manifold and the other across the Open ing of the auxiliary passage. The invention is disclosed on the accompanyin g drawing in which:

Figure 1 shows a side view of an internal combustion engine with the new form manifold and heating arrangement applied'thereto, parts `of the exhaust manifold being shown in section.

yFigure 2 is a plan view of the exhaust man- Serial No. 257,251.

ifold removed from the engine with parts broken away and shown in section.

Y Figure 3 is a section through the intake and exhaust manifold on the line 3 3 of Figures 1 and 2.

Figure 4 is a detail view of a modified form of valve.

kFigure 5 is a sectional yView at right angles to Figure 4 of the modified form adapted Yfor operation from the dash. Referring to Figure 1, the numeral 10 designates an yinternal combustion engine as a whole, 12 the intake manifold, 14 the exhaust manifold, and 16 the carburetor. The carburetor 16 is connected to the intake manifold 12 by means of a riser 18 which passes through the exhaust manifold 14, as seen from Figures 2 and 3. The ,riser 1S passes centrally through the exhaust manifold and is surrounded on all sides by a chamber 20, which has a port 22 at its lower portion which leads to the exhaust pipe 24.

AExtending centrally parallel to the exhaust manifold 14 is a pair of walls 26 and 28 forming the auxiliary passage 30 therebetween to conduct the exhaust gases to the exhaust tube 24 when either or both Valves 32 or 34 are across the exhaust manifold.

' Positioned in the exhaust manifold at either side of the riser 18 is a pair of similar valves 32 and 34 which are capable of beingI turned either across the path of the manifold as shown by the valve 32 or in ali gmnent with the Wall 26 to close the auxiliary passage 30, as shown by the valve 34.

These valves are adjusted from below as shown in Figure 1, the adjusting means comprising a. holding member 35 and the bolts 37 which may be released and the valve shifted to its desired position and the bolts retighti fi (l yvalves will be placed in the position ofthe pied by the valve 32 in Figure 2. During ex- 1 treme cold weather, -or in the winter the bot-h valve 34 in Figure 2. During seasons `of the year when the weather is intermediate between the extremes of heat and cold,only. one

valve may be lmoved across the exhaust manifold as shown in the position of the two valves Y in Figure 2.

With both valves across the manifold the exhaust from all the cylinders will be com'- pel'led to travel through the auxiliary passage 2O and to the exhaust tube 24, only such gases arriving at the riser 18, as will i-n their natural c-ourse iiow through theport 22 to thechamber 20. When one or bothfof the valves 32 and `34is closed,`"it will force either half or all, .respectively7 of the exhaust gases to impinge directly against theriser 18 and pass from theportv 22 to the exhaust tube 24, giving amuch greater degree ofheating to the carbureted gases "as they pass from the carburetor' 16 to the intake manifold 12 through the riser 18.

Referring to the structure shown in Figure 4, it will be seen that as a modification the operation of the valves 32 and 34l may beA controlled from the instrument board or other suitable parts of'an automotive vehicle. The valve 34 is shown vas mounted on a stem 36 journalled in a lower plate 38 suitably secured to the exhaust manifold and at its upfperpor- Vtion in a stud portion 40 formed integral with vthe exhaust manifold 14. rThe'upper portion of the stein 36 isp'rovided with a'pair of washers 42 between which there is confined acoil spring 44. The end of the stem has secured therein a cotter lpin 46 tohold the parts in secured relation. The opposite end of the stem 36`li'as secured thereon an arm 48 having an eye 50 for the application of a suitable linl-:age which extends to the instrument board or ydash of the automotive vehicle to which the present invention is intended to be applied.

The function ofthe valves shown in Fig-v ures 4 and 5, is precisely the same asthat shown in Figures 1 to 3 inclusive, the single difference residing in the changed stiucture necessary to adapta' the valve to operation from the dash.

The various parts aresuitably interconiiected or secured by means ofbolts 52 in a.

v wellknown manner.

The invention is shown as applied to a six cylinder engi-ne, the two middle exhaust 4ports 54. and 56 beingsiamesed, however, the invention is capableofadaptation to an engine of any suitable numherfof cylinders.`

If desired, the vpassage 30 may be lengthened to extendVY past the mouths of theexhaust at onel side and only one valve positioned between the two manifold.

I claim:

kports onone side of the 1. In combination with an internalfcoin vbustion engine `:having inta-ke and 'exhaustmanifolds, a riser connected' t'o'said intake manifold, and a plurality of means in said vexhaust manifold to direct all or a. part of the exhaust gases against the riser. A 2. VThe combination of claim 1, said means comprising independently operated valves', the closingV of one valve across the exhaust manifold causing a part of the exhaust gases to impinge directly against the riser, the closing of bothV valves across the exhaust manifold preventing substantially all of the exhaust gases Vfrom impinging directly against the riser, and' the openingV of both valves allowing free passage of the gas through the manifold and causing substantially all of the exhaust gases to inipinge against the riser.

3. In combination withan internal conibustion engine having' an exhaust manifold and an intake manifold positionedthereover, a riser froml the carburetor passing through the exhaust manifold, and a plurality ofindependent Vmeans inl saidk exhaust manifold independently operated from its underside for' controlling therflow of exhaust gases about 'said' riser, said means lcapablerof di.v recting all or alpa-rt'of said gases fromor vto said riser.

i 4. In combination with aninternal 'com-p 'bustion engine having intake and' exhaust manifolds, arriserfrom the carburetor Ato theV intake manifold passing through the exhaust manifold, an auxiliary passage in the exhaust manifold to allow the exhaust gases to be ley-passed away from vdirect contact with the riser, and means forcontrol-ling the flow of the exhaust gases through said passage.

5. The combinationof claim 4, saidv means comprising a plurality of members control- 4;

ling said passage from a plurality of points.

6. The combination of claim 4, saidmeans comprising two valve independently controlling opposite ends of said passage.

7. The combination of claim 4,'said passage positioned centrally longitudinally of said `manifold and passing through said exhaust ice ics

' extending to opposite sides of said riser, a

port between said passage and exhaust manifold to allow the circulation of exhaust gases to and from said riser, and means for controlling the passage of exhaust gases through said auxiliary passage.

10. In combination with an induction operated internal combustion engine having intake and exhaust manifolds and two valves in said exhaust manifold for directing the gaseous medium passing therethrough against a portion of the induction system to cause a heating of the engine fuel, one valve positioned at either side of the discharge opening of the exhaust manifold.

11. The combination with an internal combustion engine, having intake and exhaust manifolds, a riser forming a continuation of said intake manifold, a pair of valves in the exhaust manifold, one at either side of said riser, for directing the gaseous medium passing ,through the exhaust manifold against said riser vto cause a heating of the engine fuel.

12. In combination with an internal combustion engine having intake and exhaust manifolds, a riser connected to said intake manifold and passing through said exhaust manifold, and a plurality of valves in said exhaust manifold to direct all or a part of the exhaust gases against the riser.

13. In combination with an internal combustion engine having intake and exhaust manifolds, a riser connected to said intake manifold and passing through said exhaust manifold, and two valves positioned at opposite sides of said riser in said exhaust manifold to direct all or a part of the cxhaust gases against the riser.

14. In combination with an internal combustion engine having intake and exhaust manifolds, a riser from the carburetor to the intake manifold assing centrally through the exhaust mani old, an auxiliary passage formed with said exhaust manifold and positioned centrally longitudinally thereof and extending to opposite sides of said riser, a port between said passage and exhaust manifold to allow the circulation of exhaust gases to and from said riser, and a plurality of valves in said exhaust manifold for controlling the passage of exhaust gases through said auxiliary passage.

15. In combination with an internal combustion engine having intake and exhaust manifolds, a riser from the carburetor to the intake manifold passing centrally through the exhaust manifold, an auxiliary passage formed with said exhaust manifold and positioned centrally longitudinally thereof and extending to opposite sides of said riser, a port between said passage and exhaust manifold to allow the circulation of exhaust gases to and from said riser, and means for controlling the passage of exhaust vgases through said auxiliary passage, said means comprising a plurality of valves in said exhaust manifold capable of being independently moved to either close said exhaust manifold or to close said passage.

In testimony whereof I affix my signature.

EINAR VALLER.

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