US1889270A - Manifold construction - Google Patents

Description

Nom 29, 1932. "H. T. THOMAS ET Al.

MANIFOLD CONSTRUCTION Filed March l2, 1928 NN MN Patented Nov. 29,4 1,932

UNITED .STATES PA'rENrgA oFFicE nonnen r. Tnoiras; or LANSING, AND ANDREW L. man., or nnrnorr, moment' j MANIFOLD coNs'rRuctl'roN Application led Iarch 12, 1928. Serial No. 260376. i

This invention relates to'a manifold construction and more particularly to an improved construction :of this character including a novel arrangement of heat controlling means. i

One of the-objects of this invention is provide "apparatus of this character wherein means is provided for passing a heated fluid, through the mixture generated by the car- -bureting device; for controlling the rate of How of the heated fluid; for localizing the 4heat at the desired point or points with reference to the gaseous mixture; and to `obtain these advantages without altering the proportions of the mixture. I

Another important object of this invention l is to provide apparatus of this character whereby the heat employed for controlling the temperature of the* mixture generated by the carbureting device is controlled jointly by the operation `of the engine and the underhood temperature.

Another object of this invention is to provide apparatus of the herein described character wherein the amount of heat permitted to act upon the gaseous mixture may be automatically regulated and controlled in accordance with the operating conditions of the engine at that particular instant.

Still another object of the invention is to provide apparatus of this nature wherein the flow of the heat fluid is controlled by valves actuated by'a suction device connected to the intake manifold of the engine, the effect of this suction device upon the valves being furthericontrolled by a thermostatic device responsive to changes in the under-hood temperature.

Various other objects,Y advantages and novel details of construction of the present invention .will be made more' apparent as this description proceeds, especially when considered in connection with the-accompanying drawing wherein our improved manifold construction is shown in combinatio with a conventional type of motor the parts being partly ineleva-tion and partly in vertical section.

Referring now to the drawing whereinA like reference charactersindicate like parts 1t will be noted that there illustrated fragmentarilya conventional type of motor 10 provided with an exhaust manifold 11 and an inlet manifold 12 connected to a carburetor. 13. The reference character 14 indicates the usual butterfly valve located between the carburetor 13 an intake manifold 12. The gaseous mixture generated by the carburetor 13 enters the intake manifold.. 12 substantially centrally longitudinally mthereof through the inlet opening 15.

nxtendingiongitudimuy through the i'ntake manifold 12 is a heating device indicated generally by the reference character 16. This heating device consists essentially of a pipe or conduit which enters the inlet manifold 12 through one end thereof and passes longitudinally therethrough and out of the manifold through the other end. Exhaust 'gases are adapted to be passed through this heating element 16l in a manner to be more fully hereinafter described, but it will be apparent that by reason of this construction a thorough heating of the mixture from the carburetor will be obtained because the heatlength of the manifold.

It is desirable and expedient to localize the heat of the heating device at one or more points throughout the intake manifold and in the present embodiment the heat is'local- .7 5 ing device extends throughout the entire ized adjacent the inlet opening 15 of the manifold. This is accomplished in the present instance by forming t gas through the heating prtion of the heating element to thus localizee heating device-16v with a restricted portion 17. Thus the pasat the restricted portion the heat adjacent the opening 15 where the carbureted mixture enters the intake maniffold. Obviously the heat may also be localized at any desired point or points through'- out the length of the heating device by forming this heating device 16 with a portion or portions of different cross section or by havinga portion or portions 'of greater size or diameter thus presenting a'greater exposed area to the mixture being heatedm sage of the exhaust gases through the heating element. Preferably associated with the valve 21 are balehembers 22 which act, even in the open positio of valve 21 to retard the passage of the exhaust gases through the heating element to the exhaust manlfold. The connection 18 between the heating element and the exhaust manifold at one end includes a washer or gasket 18 of asbestos or other material which'is a non-conductor of heat and the connection 20 between the heating element and the manifold at the other end in.l

cludes a gasket or washer 20 of asbestos or, 'u

other material which is a non-conductor of heat. Thus the heat stored in the mass of metal which comprises the exhaust manifold cannot flow from this` exhaust manifold thro h Y the heating device to the intake manilbld to overheat-.this manifold and the carbureted mixture therein contained.` This back-flow of heat frequently occurs, particularly after the motor has been driven hard or continuously and is stopped. Such back-flow to the heat intake manifold sometimes sufficiently overheats the carbureted mixture to prevent the read starting of the motor again. By insulatlng the heating device and the exhaust manifoldv in the manner 11st described this objection is eliminated. y

Located in the outlet end of the exhaust manifold isa main valve 23 the purpose of which is to cause more or less of the exhaust gasto flow through the heating element 16,

ythis valve being located above the connection 20 between the outlet end of the heating element and the exhaust manifold. Obviously as valve 23 approaches closed position more of the exhaust gas is caused to travel through the heating element 16 and as valve 23 approaches open position the opposite conditions exist. ,f

' For controlling valves 19, 21 and23 there is provided a suction device-here shown as consisting essentially of a cylinder 24 connected at one end thereof by a\conduit 25 with the intake manifold 12. A piston 26 reciprocates in cylinder 24 and is connected by means of a rod-27, a thermostat 28 and a second rod 29 to an operating lever 30 of valve 23. If desired, a bellows or bellowy like device maybe substituted for the vacnum or suction device herein illustrated.

The thermostat` 28 may be in the form of a metallic bellows although obviously any de- 'sired typeA of Vthermostat may be employed.

A coil spring 31 located within cylinder 24 acts normally to urge piston 26 to the left, as viewed in the drawing, against the action of the vacuum created in the right hand end of the cylinder by reason of its connection with the intake manifold. Valve 21 is provided with an operating lever 32 and valve 19 is provided with an operating lever 33 which are united as for instance by means of a link rod 34 so that they may operate in unison. A rod 3,5' connects the operating lever 32 of valve 21 to an arm 36 connected to valve 23. Therefore any movement of piston 26 simultaneously operates valves 23, 21 and 19.

In operation, when the engine is idling, the suction of the intake` manifold 12 moves the piston 26 to substantially thefull line position shown inthe drawing to thus cause the valves 19, 21 and 23 -to assume substantially the positions also illustrated in full lines. Under these conditions substantially all of the exhaust gases from the exhaust manifold are caused to flow through the heating element 16. As the throttle valve 14 is opened the, suction effort exerted by the intake manifold is diminished in accorda ce with the increasedspeed of the motor and as a consequence spring 31 acts to move piston 26 toward the left to move the several valves toward their dotted line positions. Obviously as valve 23 approaches its full open position a greater percentage of exhaust gas is permitted to pass \directly out through the exhaust manifold. This creates an ideal condition because under these circumstances a greater quantity of exhaust gas is passing through the exhaust manifold and consevquently a smaller percentage of the total los hood temperature. As this temperature rises,

vthat it is unnecessary or undesirable to highy heat the incoming mixture from the carburetor. y

It will be noted that with the herein described construction the combustible mixture in the intake manifold is heated by passing 60* actuating said'valves.

the heating fluid through the mixture Without altering the proportions of this mixture and that further with the herein describedv construction the heat may be localized at any desired point. l

It will be obvious that while one specific embodiment of the inventionhas been illustrated and described "in detail various changes in many of the essentialand all of the non-essential details of construction may be resorted to Without departing from the spirit and scope of this invention and to this end reservation is made to make such' changes as may come Within the 'purview of the accompanying claims.

What we claim as our invention is f 1. The combination with an internal combustion engine including an exhaust manifold, an intake manifold and a charge forming device connected thereto, of means for heating the charge passing through said uitake manifold, said means including a conduit connected to said exhaustl manifold and ex-` tending through said intake manifold, said conduit having means for localizing the heat at one point -within said manifold.

2. The combination With an internal combustion enginelincluding an exhaust manifold, anintake manifold and a charge forming device connected thereto, of means for heatingfthe charge passing through said intake manifold, said means includin ya con duit connected to said exhaust mani old' and extending through said intake manifold, said conduit having a relatively restricted portion at one point in its length, for the purpose set forth. g

3. The combination with an internal combustion engine including an exhaust manifold, an intake manifold and a charge forming device connected thereto, of means for heating the charge passing through said intake manifold, said means including a conduit extending longitudinally through said intake manifold, said conduit having a flattened portion for localizing the heat at one point Within the manifold,- and means connecting said conduit to said exhaust manifold.

4. The combination with an internal combustion engine includin@ an exhaust manifold, an intake manifold and a charge forming device connected thereto, of'a heating element including a conduit extending through said intake manifold, valve controlled means connecting said conduit to saidexhaust manifold, a valve in said exhaust manifold for directing exhaust gases through said conduit and a ysingle suctionactuated 5. The combination with an internal combustion engine including an exhaust manifold, an intake lmanifold and a chargeforming device connected thereto, of a heating element including a conduit extending through Isaid intake manifoldrvalve controlled means u the suction in said intake mechanism for.v

` fold, a valve in said exhaust manifold for directing exhaust gases through said conduit, a single suction device connected to the .intake manifold andt actuated in dependence upon manifold and means connecting saidi suction device to said valves for actuating the latter.

7. The combination with an internal combustion engine including an exhaust manifoldan intake manifold and a charge forming device connected thereto, of means for .heating the chargeipassing through said intake manifold including a conduit extending through said intake manifold, means connecting the inlet and outlet ends of said conduit to said exhaust manifold, valves controlling said inlet and., outlet, a valve in said exhaust manifold for directing exhaust gases through said conduit, means connecting said valves for simultaneous operation and a suction device connected to'said intake manifold for actuating said valves.

8. The combination with an internal combustionv engine including an 'exhaust manifold, an intake manifold and a charge forming device connected' thereto, of means for heating the charge passing through said intake manifold including a conduit extending through said intake manifold, means connecting the inlet and outlet said exhaust' manifold, valves controlling said inlet and outlet, a valve in said exhaust manifold for Adirecting exhaust'gases through said conduit, means connecting said valves for smiultaneous operation, a suotlon device connected to said intake manifold forL actuating said valves and a thermo-responsive device.

for modifying the action of said suc/tion means.

9. The combination with an internal combustion engine including an exhaust manifold, an intake manifold, and a charge form- Ylng device connected thereto, of means for heating the carbureted mixture including means for passing a heating medium through the carbureted mixture and for localizing the heat at a predetermined desired point.

10. The combination with an internal combustion engine including. an exhaust manifold, an intake manifold and a charge forming device connected thereto, of means for passing a heating medium through the carends of said conduit to iio bureted mixture for heating the latter and for-restricting the passage of the heating medium at a predetermined point to localize the heat at the said point.

11. The combination'with an internal combustion engine including an exhaust manifold, an intake manifold and a charge forming device connected thereto, of a heating device associated With said intake manifold, means for passing exhaust gas from said exhaust manifold to said heating device, a plurality of valves for controlling the passage of exhaust gas through said heating device, a pressure actuated device for actuating said valves, and thermoresponsive means for varying the actuation of said valves incident .to a predetermined Iactuation of said pres sure actuated device. f

12. The combination with an internal combustion engine including an exhaust manifold, an intake manifold and a charge forming device connected thereto, of a heating device associated with said intake manifold,-

means for passing exhaust gasfrom; said exhaust manifold to said heating device, a plurality of valves for controllin the passage of .exhaust gas through said hating device, a fluid actuated device. a connection between said fluid actuated device and said valves for actuating the latter from the former, and thermoresponsive means for adjusting said v connection.

13. The combination with an internal combustion engine including an exhaust manifold, an intake manifold, and a charge forms ing device connected thereto, of a heatingl device arranged in said intake manifold, a

Vconduit for passing exhaust gases from said exhaust manifold through said heating device,.a valve for controlling the flow of exhaust gases through said conduit, a suction device connected to the said intake manifold.

va-connection between said suction device and said valve for actuating the latter from the former, and athermostat in said connection for modifying the control of the valve by the suction device. 14. The combination with an internal coming device connected to the intake manifold of a heatnga device associated with the said intake manifold, a conduitfor conducting exhaust gases from said exhaust manifold to said heating device, a valve for controlling the fiow of exhaust gases through said conduit, a suction device connected to the intake manifold, a connection between the suction device and the valve for actuating the latter from the former, and temperature responsive means for adjusting said connection.

In testimony whereof we aix our signa-y tures.

HORACE T. THOMAS. ANDREW L. KIMBALL.

bustion engine including an exhaust manifold. an intake manifold,and a charge forming ydevice connected thereto, of a heating device arranged in said intake manifold, a conduit for passing exhaust gases from said exhaust manifold through said heating device, a valve for controlling the How of exhaust gases through said conduit, a suction device connected to the intake manifold, a

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