US1761958A - Dual intake manifold - Google Patents

Description

June 3, 1930. D. E. ANDERSON DUAL INTAKE MANIFOLD Filed Oct. 8, 1927 O O I Q Patented June 3, 1930 PATENT OFFICE DAVID E. ANDERSON, OF DETROIT, MICHIGAN DUAL INTAKE MANIFOLD Application filed October 8, 1927. Serial No. 224,962.

The invention relates to manifolds for internal combustion engines and more particularly to intake manifolds designed to supply explosive mixture to the intake ports of multicylinder engines.

these engines the firing order is such that the charges in two adjoining cylinders are fired successively. If a single branch of the intake conduitsupplies mixture to these successively firing cylinders, as is usually the case, there is a tendency to unequal distribution of the charge or of its constituents to the cylinders which draw their charges from the same branch. The principal object of i 1 theinvention is to provide means whereby 90 crankshaft is employed. The arrangementof the cranks 1n such manner that crank-.

. pins 1 and 4 are on opposite sides of the axis, and crankpins 2 and 3 also opposite but at 90 from pins 1 and 4 results in a firing order in which, at least once in every complete engine cycle, two adjacent cylinders in one block fire successively. Such an arrz-ingement of cranks andoneof the possible firing orders therefor are disclosed in Balancing of Engines, Sharp, 1907, p. 117-118. Various other firing orders are possible, of course, one of which is referred to herein. 1

In the accompanying drawings illustrating the application of the invention to an engine of the above-mentioned eight-cylinder type, Fig. 1 is a plan view, partly in section, representing the intake system.

Fig. 2 is a partial vertical section on line 22 of Fig. 1. I

Fig. 3 is a view similar to Fig. 1- but showing a modified arrangement of intake. passages, and

Fig. 4 is a similar fragmentary view of another modification.

Referring to the drawings, 9 and 10 indicate the blocks of an eight-cylinder V-engine, each block containing four cylinders. The

cylinder openings are indicated by numerals In certain types of 1 to 8, respectively, the arrangement of the numerals serving also to indicate the firing 0rder, i. e., the cylinder indicated by 1 fires first, then the one indicated by 2, and so on. With the arrangement illustrated it will be noted that cylinders 7 and 8 are adjacent.

Intake valve chambers are indicated at 11 and exhaust valve chambers at 12. Commuv nication between these chambers and the combustion chambers ordinarily formed in the heads ofthe cylinder blocks is controlled by valves in the usual manner. Separate intake ports are provided for each cylinder so that the sucessively firing adjacent cylinders are not required to draw their charges from a common valve chamber.

In order also to provide separate conduits from the vicinity of the carburetor to the valve ports the intake manifold is formed in a double system of passages indicated respectively by A and B.- The system A comprises a transverse passage 13 communicating at its ends respectively with longitudinal branches 14 and 15. The branch 14 is connected to the intake ports of cylinders 5 and 7 and branch 15 to the ports of cylinders 1 and 3. ,The system B comprises similarly a transverse passage 16 communicating at its ends respectively with branches 17 and 18, branch 17 being connected to the ports of cylinders 4 and 6 while branch 18 is connected to the ports of cylinders 2 and 8. The transverse passages 13 and 16 may be formed integrally with a common wall 19 and are both be seen that cylinders 1, 3, 5 and 7 draw their charges from system A while cylinders 2, 4, 6 and 8 are supplied by system B. Thus no two successively firing cylinders draw from the same valve chamber nor from the same manifold branch nor. even from the same system. In other words, each Cylinder draws its charge from the riser immediately above the carbureter without being affected, during the flow from that point to. the intake port,

by reason of the suction from or flow to any verse conduit 32 of the system A',is connected other cylinder, or the ramming effect due to flow to a. previously opened port. This arrangement is therefore highly conducive to uniform distribution. I

In the form shown in Fig. 3 the twomanifold systems, indicated as A', and B, are wholly separateand are connected respectively to separate carbureters 30, 31. The transto a branch 33 supplyingcylinders 2 and 8 while transverse conduit 34 of system B, is connected to a branch 35 supplying cylinders 5 and 7. The connections at the other engine block will be reversed; of course, as in Fig. 1, the conduit 32 supplying the intermediate cylinders and conduit 34 of the endcylinders.

Fig. 4 shows an arrangement similar to that shown in Fig. 3 except that the conduits 42, 44, correspond to conduits 3 2, 34 of Fig. 3 are here' shown as returning to a common transverse plane so as to equalize the distances from the carbureter to the respective ports. In-

this form again, the conduit 44 is connected at one end to a branch 45 feeding the end cyl- 'inders and at the other to a branch 46 feeding the intermediate cylinders while conduit 42 is connected at one end to branch 43 feeding the cylinders intermediate those supplied by branch 45 and at the other to branch 47 feeding the end cylinders of the other block. I

Various other modifications in details may be made and therefore I do not wish to be restricted to the specific form's herein described except as required by the language of the "claims in view of the prior art:-

2. The combination with an eight-cylinder V-engine of the type in which two cylinders 'termediate cylinders.

"at one end of one block fire in immediate sucand carbureting means therefor, of manifolding means comprising two systems of passages, each system arranged to supply fuel mixture to the end cylinders-of oneblock and i the intermediate cylinders of the other block.

5." The combination with an internal combustion eight cylinder V engine having the cylinders whose firing-orders are 1, 3, 4 and 6 in one block and those whose firing orders are 2, 5, 7 and 8 in the other block of manifolding means comprising two systems ofpassages, one system arranged to supply fuel mixture to the cylinders whose firing order is 1, 3, 5

and 7 and the other system supplying the cylinder whose firing order is 2, 4, 6 and 8.

6. The combination with an internal combustion eight cylinder V engine having four cylinders in each block and having a firing order such that two adjacent end cylinders in one block fire in immediate succession of manifolding means comprising two systems of passages each supplying mixture to four of said cylinders, one of said adjacent cylinders receiving fuel mixture from one of said systems and the other cylinder receiving mix- I tore from the other system; 7

In testimony whereof I affixnry signature.

DAVID, E. ANDERSON.

cession and carbureting means therefor of manifolding means including one manifold branch supplying the end cylinders of the I block and another branch supplying the in- 3. Structure as set forth in claim 2, the

manifolding means including two systems of passages, each system supplying the end cylinders of one block and the'inter'mediate cylinders of the other block. 4. The combination with an eight cylinder V-engine having fourcylinders each block

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