US1926096A - Internal combustion engine - Google Patents

Description

Sept. 12, 1933. w` R, GRlswoLD 1,926,096

INTERNAL COMBUSTION ENGINE Filed March 13, 1931 2 Sheets-Sheet l ML75?? R EQJSWULD.

Sept. 12, 1933. w, R. GRlswoLD INTERNAL COMBUSTION ENGINE Filed March 15, 1931 2 Sheets-Sheet 2 Patented Sept. 12, 1933 UNITED STATES PATENT ori-'ice INTERNAL coMBUs'rIoN ENGINE Application March 13, 1931.

Serial No. 522,377

10 Claims. (c1. 12s-122) haust manifold of the engine to be heated there by, the thermostatic means being exposed directly to the -exhaust gases and connected with valve means in the passage of the exhaust gases through theheater.

Another object of the invention is the provision of a therinostatically controlled heater for intake manifolds, wherein the thermostatic means may be readily 'adjusted to control or regulate the passage of the heating medium to the heater at preselected temperatures.

With the above and other objects in View thev invention resides in the sundry details of the construction, combination and arrangement oi parts, hereinafter more fully described and pointed out in the appending claims.

In the drawings which show the preferred embodiment of the invention as at present devised Figure l isv a side View of the heater;

Figure 2 is a longitudinal sectional vview taken substantially on line 2--2 of Figure l;

Figure 3 is an end View ofthe heater as shown in Figurel, and

Figure i is a transverse sectional view taken substantially on line 4 4 of Figure 1.

The heater of the present invention is provided by jacketing a portion of the intake manifold M, the jacket forming an enclosing casing about the manifold into which the exhaust gases vfrom the engine are admitted. v

With particular reference to the drawings the intake manifold lVi comprises the normal intake galleries l surrounded at the center portion by a casing 2 spaced therefrom to provide a chamber 3. This chamber 3 communicates with the exhaust galleries oi the engine through passages 4 in each of which is disposed a butterfly valve 5 caused to be actuated simultaneously by a thermostat 6 to open and close the passages 4. The thermostat 6 is located in the heater chamber 3 and exposed directly to the exhaust gases admitted into said chamber.

The thermostat 6 comprises a flanged bearing casting 7 having an openingor bore 8 extending therethrough and piloting in an opening 9 in an 60 end of the casing 2, as shown in Figure 2, said v casting being secured in position to the casing by bolts 10 extending through the flange 11.

Secured to the inner end of the casting 7, preferably by welding, is an end of the tube 12, designed to extend substantially longitudinally of the chamber 3, while the opposite end of the tube is closed in any suitable manner, such as by a welded-in plug 13. The tube 12 is of a material having a high lineal coefficient of expansion, such as copper, Monel metal, or the like, such as will withstand the high temperatures within the chamber 3. Slidabiy disposed in the tube and substantially coextensivetherewith is a rod 14 of material of a lower coeilicient of lineal expansion than the tube such as carbon, carborundum, or porcelain. f

A lever 15 is pivotally mounted on the casting 7 so as to oppose the front end of the bore 8 in said casting. This is preferably accomplished by bifurcating the front face of thecasting, so as to provide spaced flanges 16 between which an end portionof thelever l5 extends and is pivotaliy mounted on a pin 17 extending through said spaced flanges 16. An adjusting screw 18 is carried by the lever 15, preferably at a point above pivot 1'?, but aligned with the bore 8 of the casting so as to extend thereto and bear upon a slidable metallic bearing block 19 designed to abut against the adjacent end of the rod 14. Adjusted positions of the screw 18 may be maintained by a lock nut 20 provided on the screw. The butterfly valves/5 are connected to the lever 15 by links 21 and 22, and a spring 23 connected to lever 15 and to any suitable nxed part normally 95 urges the valves toward closed position and the lever to move and maintain the adjusting screw 18 in an abutting contact with the bearing block 19,'and the latter against the adjacent end of the rod 14 which will react against the closed or plugged end 13 or the thermostat tube 12.

The parts are so adjusted that, at ordinary atmospheric temperatures, the vanes of the butterly valves will assume a position substantially parallel to the axes of the passages 4. In this condition, the thermostat tube 12 is in its normally contracted state and the action of the spring 23 has caused the parts 18, 19 and 14 to maintain an end to end abutting relation. When the motel' is started the exhaust gases will circulate through the passages 4 to the chamber 3,

heating the casing 2 and the walls of the intake galleries 1. As the exhaust gases heat the chamber 3, the thermostat tube 12 will expand length- Wise in varying degrees according to the temperature in the casing 2.

` Since the rod 14 and the sliding bearing block 19 are of lower coeflicient of expansion than that ot' the thermostat tube 6, the total length of the parts 14 and 19 will be less at the higher temperatures than the distance from the inner face of the closed end 13 of the tube 12 andthe end of the adjusting screw 18 and, by virtue of the force constantly exerted on the lever 15 by the spring 23, the parts 14, 18 and 19 will be moved toward the closed end of 13 of the tube with its increasing length. The resultant movement of the lever is transmitted through the links 21 and 22 to close the butterfly Valves 5.

The amount of Vclosing movement of the lever necessary to close the valves at preselected tem peratures, may be regulated and controlled by an adjustment of the screw 18. On cooling, the reverse action takes place, that is, the tube 12 contracts lengthwise Aand its closed end 13 will react to move the rodV 14, the sliding bearing 19, and the lever 15 against the normal tension of the spring 23, whereby the valves 5 are positively opened. Y

The butterfly valves each comprise the vanes 5 on a valve-shaft 24 having one end slidablyextending through a removable bearing 25 screwed into a wall forming passage 4 and the other end journaled in a bushing 26 carried in a removable plate 27 mounted on the opposite wall forming the passage 4. The outer' end of the shaft 24 has a lever 28 thereon connected with the link 22. It will be observed, that by removing the bolts 29 securing the cover plates 27 in position, the valves 5 may be examined and removed.

It will also be observed that due to the construction of the present device the thermostat 6 can be readily removed for cleaning or replacement by disconnecting the lever 15V and by re- ,moving the bolts 10 so that the casting 7 maybe removed from position, withdrawing the thermostat 6 through the'opening 9. By having the thermostat in theI heater chamber 3 it is directly .exposed to the heating gases so that it will respond more quickly to the heat conditions in the chamber. I e e Having thus described the invention it will be manifest that a very durable, dependable, simple and economical device has been provided for a thermostatically controlling intake manifold heater of internal combustion engines, and, while the inventionis described in -the form which is considered to bel the best, it is not limited to such form because it is capable of .embodying in other forms; and it is to be understood that in and by the claims following the description herein, it is intended to cover the invention in whatever form it may embody within the scope thereof.

Having described the invention, what is claimed as new is: Y

1. An intake manifold for internal combustion engines having an intake passage with an external heating chamber thereabout, said chamber having an opening in an exterior wall, means connecting said chamber witha source of heat supply, valve means for controlling the passage of the heatingmedium to said chamber, a thermostat disposed in the heating chamber and insertable and removable throughthe opening in said chamber wall, and a connection between said thermostat and said valve means whereby the movement of said thermostat will be transmitted to said valve means to open and close the latter, said connection including a spring pressed bearing member maintaining contact connection with said thermostat.

2`. An intake manifold for internal combustion engines having an intake passage with a heating chamber -thereabout, means connecting said chamber with a source of heat supply, valve means for controlling the passage of the heating medium to said chamber, a thermostat disposed in the heating chamber, and a connection between said Vthermostat and said valve means whereby the movement of said thermostat will be transmitted to said valve means to open and close the latter, said connection including a spring pressed bearing member maintaining contact connection with said thermostat, said bearing member being adjustably regulatable with respect to said thermostat, whereby the closing of the valves may be effected at predetermined heat temperatures.

3. A heater for intake manifold of internal combustion engines including an exhaust jacket to extend about said intake manifold and forming a heating chamber, said jacket having a passage for admitting exhaust gases to said chamber and an opening, Valve means in said passage for controlling the passage of the heating medium to and from said chamber, a thermostat disposed in the heating chamber and insertable and removable through the opening in said jacket, a pivoted lever exterior of jacket and positioned to be operated by the movement of the thermostat,

spring means for normally maintaining an abutting contact between said lever and thermostat, and an operative connection between said lever and said valve means whereby the movement of said thermostat will be transmitted to said valves y Ya pivoted lever exterior of the jacket and having a bearing member thereon positioned to contact with said thermostat, spring means normally maintaining said bearing member in contacting relation with said thermostat, an operative connection between said lever and said valves, whereby the movement of said thermostat will be transmitted to said Valves to open and close the latter, said bearing member being adjustable with respect to the thermostat whereby said valves may be closed below predetermined heat temperatures in the chamber.v

5. An intake manifold'heater for internal combustion engines including a jacket extending around said manifold to provide a heat chamber having inlet and outlet passages connectable to a source of heat supply, pivoted valves to open and close said passages for controlling the pasfsage of the heating medium to the chamber, a

supporting bushing piloting in an opening in said jacket and secured in position therein and having a boretherethrough, a longitudinally expansible and contractible thermostat carried on one endof said bushing and insertable in said opening, an. operable` connection between said valves and said thermostat including adjustable means on said connection to extend in said bore of said bushing and abut with said thermostat, and means for normally maintaining said adjustable means in abutting relation with said core.

6. In an intake manifold heater for internal combustion engines having a heat chamber connectable to a source of heat supply, valve means to open and close the chamber to the heating medium, a bushing piloting in an opening in a wall of said chamber and having a bore therethrough, a tube of high lineal coeiiicient of ex= pansion having one end aligned with said bore and lcarried on the inner end of said bushing and an abutment at the other end of said tube, a core slidable in said tube and of a lower coefficient of expansion, an operable connection between said valve means and said thermostat including adjustable Contact means on said connection to extend in said bore of said bushing and abut with said core, and means for normally urging said adjustable Contact means in abutting relation with said core and said core against the abutment of said tube.

'1. In an intake manifold heater for internal combustion engines having a heat chamber conn nectable to a source of heat supply, valve means to open and close the chamber' to the heating medium, a bushing piloting in an opening in a wall of said chamber and having a bore there through, a tube of high lineal coefficient of eX- pansion having one end aligned with said bore and carried on inner end of said bushing and an abutment at the other end of said tube, a core slidable in said tube and of a lower coeflicient of expansion, a lever pivotally mounted on the outer end of the bushing, a contact member on said lever, a bearing block slidable in said bore and positioned between said core and contact mem-- ber, yielding means normally maintaining said contact member, said block and core in abutting relation and the core against the closed end of said tube, and a link connection between said lever and said valve means.

8. In an intake manifold heater for internal combustion engines a jacket forming a heat chamber, heat control means for said chamber, a

supporting bushing piloting in an opening in said jacket and secured in position therein and having a bore therethrough, a thermostat carried on one end of the bushing and insertable in said opening in the jacket, a lever pivoted on the bushing and exterior of said chamber, a bearing member on the lever positioned to eX- tend into the bore of said bushing to contact with said thermostat, yielding means acting on said lever for maintaining said bearing member in contact with said thermostat, and an operative connection between said lever and said heat control means.

9. In an intake manifold heater for internal combustion engines a jacket forming a heat chamber adjacent the manifold, heat control means for said chamber, a supporting bushing piloting in an opening in said jacket and secured in position therein and having a bore therethrough, a thermostat carried on one end of the bushing and insertable in said opening in the jacket, a lever pivoted on the bushing and eX- terior of said chamber, a bearing member on the lever positioned to extend into the bore of said bushing to contact with said thermostat, yielding means acting on said lever for maintaining said bearing member in contact with said thermostat, an operative connection between said lever and said heat control means, said bearing member on the lever being adjustable thereon relative to said thermostat whereby the heat control means may be operated at predetermined temperatures.

10. In a manifold having a passage therein and an opening in one wall thereof, a valve insertable in said passage through said opening, said valve including a shaft having vanes thereon, a removable bushing in the wall of said passage opposite said opening and through which bushing one end of the shaft extends, a removable plate for covering the said opening and having a journal bearing on the inner face thereof in which the adjacent end of said shaft is removably journaled, and thermostatically actuated control means attached to an end of the shaft.

W ALTER R. GRISWOLD.

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