US1704082A - Supercharger - Google Patents

Description

MMI 5; ,1929.

suxfsncsmqm Filed vec, 29. 1922 l 20 operate Patented Mar. 5, 1929An R ,UNlTED STATES A l 1,704,082 PATENT OFFICE.

GILBERT C. GOODE, OF EAST CLEVELAND, OHIO, -SSIGNOR TO THE WHITE MOTOR GOM- PANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

SUPERCHARGER.

Application iled December 29, 1922. Seriall No. 609,600.

This invention relates to a device by which the air which is delivered tothe carbureter of an internal combustion engine may be controlled to be maintained substantially uniform in the quantity supplied in a given in'- terval of time, regardless of the atmospheric pressure which may vary at different altitudes. k

rThe present invention is more particularly 1o designed tor use with, internal combustion engines which are used on motor vehicles under circumstances where the motor vehicle is used in mountainous country, where, as will be appreciated, the barometric pressure will differ at ditlerent altitudes, and will, toa greater or less extent, in accordance with the altitude adect the operation ot the internal combustion engine due to the action of the carbureter. A carbureter. which is set to and does operate satisfactorily at practically coast line conditions will not operate satisfactorily on elevations of several thousand feet. v

There are certain parts of the country where vehicles in their travels will in the course of a comparatively short time attain a ditterential altitude of several thousands of feet, and particularly in such cases it is desirable that the air supply tor the carbureter be regulated inaccordance with the atmospheric pressure.

Beference should be had to the accompanying drawings forming a part of this specification, in which Fig. l is a side elevation of a portion of an internal combustion engine with certain portions in section; Fig. 2 is a front elevation of the device; lig. 3 is a sectionI on the line A-A of 1; Fig. 4 is a section on the line B-B of lig. 1.

Referring to` the drawings, the engine cylinder block is indicated at 1 and requires no particulardescription at this time.

The intake manifold for the engine may be generally represented at 2 in Figr2, and the a5 carbureter represented at 3. The air intake portion of the carbureter is indicated at 4 and communicates with a curved pipe 5which in turn communicates with a straight pipe 6 which extends transversely between adjacent cylinders on an engine block. This pipe communicates with a pipe 7 which has a flan e 8 that is secured to a part of the engine blocli by means of nuts 9a. The pipe 7 communicates with a chambered member 9 which chambered member has an inner wall 10 hav- Bussum ing a large opening, and through the opening 1n the wall l() the chamber 9 communicates with a chamber 11. This chamber 11 has extending therefrom an elbow 12 which communicates with a pipe 13. The pipe 13 in turn communicates with a curved pipe 14 which by means of a flange 14* is attached to the anged base 15 of a blower casing 16. The blower casing is mounted upon any suitable portion of the engine, and the blower casing may be described as being formed in two parts, a rear portion '16a and a front portion 1Gb, which parts are bolted together. The blower has within it a fan 17 which is mounted upon a shaft 18,' this shaft being suitably supported from the casing, preferably by means of ball bearing supports. This f an blade may be of any proper form and dnnensions, no invention being claimed 1n the particular form of fan which is used.

The shaft 18 at its outer end has a gear 19 either formed therewith or attached thereto, and thisl gear meshes with a gear 20 which in turn 1s carried upon the fan shaft which is' lndicated at 2l by dotted lines. The fan 8o shaft of course is a usual construction in motor vehicles.

The casing for the blower fan has a central opening with a aringmouth portion 22 so that the tan which is normally so forme as to throw air in the direction of the larin member 22 will pass its air to the blower an the. air so received will be forced through the casing 16 and the yvarious pipe connections which have been described to the carbureter, but will of course be controlled in a manner which is about to be described.

Attached to the member 9 is what may be termed an auxiliary casing 23, and within this casing there is a pressure responsive device 24, this device having a part so fashioned that it will expand and contract in accordance with the pressure conditions of the atmosphere. In the present instance an expansible metallic bellows is used, but this description is given without limitation in this respect. Y

The member 24 is at one end supported by a rod 25 which extends through a suitable opening in the end of the casing 23. At its opposite end the member 24 has secured to` the bellows portion thereofa rod 26 which is mounted to freely slide in a sleeve 27 which sleeve at 'its end has lan'outwardly flaring flange 28 and this {iange is pressed in a given 110 direction by means of a spring 29 which spring at its outer end sets against a cap 30 that is secured to the end ortion of the casing 23. The flanged mem er 28 is of such a size and diameter that itk fairly snugly fits Within a chamber 23a which is formed by a portion of the casing 23 and the cap 30.

The sleeve 27 to which reference has before been made, extends through an opening with which it has a good sliding t, which opening forms a part of the casing 23. The o ning is formed b a reduced neck portion ofethe casing 23. El the wall and opening into the opening through which the sleeve 27 extends is a oove 31, this groove extending longitudina ly with respect to the sleeve 27 and at one end opens into the chamber 23a behind the flange 28. Below the sleeve 28 there is formed in the Wall a chamber 32 which has a conduit 33 that connects with the pi e 34 which in turn is connected with the lugricating system for the internal combustion en ine, which in all modern structures supp ies oil under a pressure of approximately 25 pounds per square inch, so that oil in the pi e 34 is under such pressure and will natura y fill the chamber 32 and maintain oil in that chamber under a pressure.

The rod 26 which is connected to the end of the pressure responsive device is as before stated, free to slide in the sleeve 27 under the expansion or contraction of the member 24. This rod has a duct formed therein which is shown at 35 in Figs. 1 and 3. The sleeve 27 is formed with two openings which are opposite each other, these openings being indicated at 36 and 37, and are in communication respectively with the groove 31, and the chamber 32. lVhen the member 24 expands and the rod 26 moves forward the duct 35 will come into communication with the openings 36 and 37, and thereupon oil which is held under pressure in the chamber 32 will pass through the duct 35 into the groove 31 and behind the member 28, and this oil under pressure `will force the flange 28 and the sleeve 27, forwardly, against the action of the spring 29, but the distance'which the sleeve 27 ma move will be controlled because as soon as the openings 36 and 37 move out of registry with respect to the duct 35 which is formed in the rod 26 then is shut olf and the further. I

There is also another duct formed in the rod 26, this duct being indicated at 38, and is more articularly shown in Fig. 4. This duct is a so in communication with the groove 31, and the lower portion of the duct 38 registers with a groove 39 formed in the sleeve 27, and this opening in the sleeve in turn co-operates with an opening that is the oil supply member 28 will move no formed in the casing 23 with which opening there communicates a pipe 40 that has a connection as indicated at into the crank case of the en e.

The grooves 38 and 35 are 's laced with respect .to each other as indicate and when the bellows recedes it may bring the groove 38 into registry with the groove 36 so that the oil whlch is within the chamber 23a and behind the member 28 may have access to escape, and it will be assisted in its movement by the pressure of the spring 29 against the member 28. The devices which have just been described are for the purpose of controlling the movement of a valve 41 which co-operates with theopenin through the wall 10 which is within the c ambered member 9. This valve 41 is preferably conical in shape although not necessarily so, and is mounted to slide freely -upon a rodl 42 which is at one end fastened to the end of the sleeve 27 and extends through an opening in the cap 30 which thereby serves as a support and guide. This rod 42 at one end has an adjustable'member 43 thereon against which one end of a spring 44 presses, while the opposite end of the spring 44 presses against the valve 41 and normally urges it to such a position as to close the opening through the wall 10.

When the member 24 expands and pushes the sleeve 27 forwardly in a manner which has before been explained, the pressure of the spring 44 upon the valve 41 will be lessened dueto the fact that the opposite stop member 43 is being moved away from the valve 41. This then will enable the valve 41 to be more readily moved. by the air pressure which is within the chamber 11 because, as will be re;- called, this chamber is'connected with the blower within the casing 16.

It will be understood that under normal working conditions the position and pressure of the springs 44 may be so'adjusted as to permit a required amount of air to pass beyond the valve 41 under given conditions of atmospheric pressure, the spring under such conditlons bemg sufficiently stiff to prevent complete opening of the valve 41.

When, however, due to increase in altitude and consequent decrease in atmospheric pressure, the member 24 expands and pushes the rod 42, the pressure of the spring 44 behind the valve 41 is reduced, and conse uently the air under pressure within the cham er 11 may act upon the valve 41 to push it to a more open position, and consequently permit the passage of more air to the chamber 9, which, as will be recalled, is connected with the air inlet for the carbureter.

On the reverse condition, -when the member 24 contracts it will be apparent that the stop member 43 being moved inwardly will create an increasing effective pressure of the spring 44 on the valve 41 and so move it toward its seat.

It will, therefore, be clear that in the con- 4o which delivers oil struction which has been described, after a given setting oi' the device, the Same will operate either to supply more air at decreased atmospheric pressure, or supply a diminished amount of air on pressures which are above that atmospheric pressure for which the device is adjusted.

From the foregoing description it will further be seen that the device is entirely automatic, and in mountain climbing or under conditions Where runs at various altitudes must be traversed by the vehicle, the quantity ot' air delivered to the carburetor will be maintained in such relation that the mixture which is supplied to the internal combustion engine will be under proper pressureand provide a proper mix with the fuel for giving the roper results for engine running.

At the end of the casing 9 in which is the chamber 9 there is an opening closed by a flap valve 45, which is adapted to provide an auxiliary supply of air to the carburetor when the device which has heretofore been described is not functioning.

Having described my invention, I claim l. The combination with a carburetor having an air intake, a source of air under pressure, an air conduit connecting the said source of air with the air intake, a valve controlling the passage of air through said conduit, a motor means for controlling said valve, and an atmospheric.l pressure responsive device controlling the functioning of the said motive means.

2. rl`he combination with a carburetor having an air intake, a source of air under pressure, an air conduit connectin the source of air with said air intake, a vave controlling the passage of air through said conduit, a iiuid operated motive means controlling the functioning of said valve, and an atmospheric pressure responsive device controlling the functioning of the duid motive means,

3. The combination with a carburetor having an air intake, a source of air under pressure, an air conduit connecting the source of air with said air intake, a spring-pressed valve associated with said conduit, motor means for controlling the effective pressure ot the spring upon said valve, and an atmospheric pressure responsive device controlling the functioning ot said motor means.

4:. The combination with a carburetor having an air intake, a source of air under pressure, an air conduit connecting the said source of air with the said air intake, a valve controlling the passage of' air through said conduit, a rod upon which said valve is slidably mounted, a spring member surrounding the rod and bearing against said valve at one end and against an abutment on the rod at the -other end, a fluid motor means. for moving said rod, and an atmospheric pressure responsive device for controlling the functioning of' said Huid motor means.

5. The combination with a carburetor havmg an an` intake, a source of air under pressure, an air conduit connecting the said source of air With the said air intake, a valve controlling the passage of air through said conduit, a rod upon Which said valve is slidably mounted, a spring member surrounding the rod and bearing against` the said valve at one end and against an abutment on the rod at the other end, a piston member connected with said rod, a casing member in which the piston operates, a spring normally urging the piston in one direction, a source of Huid under pressure, valvular means for controlling the delivery of iluid under pressure behind the said piston, and an atmospheric pressure responsive device controlling the functioning of said valvular means.

6. The combination with a carburetor having an air intake, a valve associated with said intake and controlling the passage ot air thereto, actuating means for adjusting said valve, a device associated with said actuating means and responsive to variations in atmospheric pressure said device including a member Whose movements 'are independent of said actuating means, and means for controlling the operation of said valve actuating means.

7. The combination with a carburetor havin an air intake, a valve controlling said inta e, actuating means for adjusting said valve a device responsive to varia-tions in atmospheric pressure and including a member Whose movements are independent ot said actuating means, and means ior causing movements of the actuating means corresponding to movements of said member.

8. The combination ,With a carburetor having an air intake, a valve` controlling saidintake, a fluid pressure operated piston connected to said valve, a pressure responsive device having la member movable in response to variations in atmospheric pressure, and pressure controlling means controlled by the movements of said member and piston for causing movement-s of said piston corresponding to movements of said member.

9. The combination with a carburetor having an air intake, a source of air under pressure, conduit means connecting said source of air with the air intake, a valve associated with said conduit for controlling the passage of air therethrough, means for adjusting said' valve, iluid operated means for actuating said adjusting means, an atmospheric pressure responsive dev1ce, and means operated by said pressure responsive device for controlling' movements of said actuating means.

10. The combina-tion With a carburetor having an air intake, a blower an, a casing surrounding the blower fan, an air conducting conduit connected With said casing and also connected with the air intake, a chamber forming a part of said conduit, a valve controlling the passage of air through said eoV chamber, a movable member to which the valve is yieldably connected, Huid operated means for actuating the member, an atmospheric pressure responsive device, and means operated by the pressure responsive device for imparting movements to the actuating means substantially proportional to variations in atmospheric pressure.

11. The combination with a carburetor having an au' intake, a source of air under l l pressure, an air conduitl connecting the source of air with the air in sa-id' conduit, a spring pressed valve controlling the passage of air through said conduit, a movable member for controlling the effective pressure of said spring upon the valve, Huid operated means for actuating said movable member, an atmospheric pressure responsive device, and means operated by said device for controlling the operation of said actuating means.

In testimony whereof, I hereunto aix my signature. a

GILBERT C. GOODE.

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