US1487234A - Carburetor - Google Patents

Description

March 18 1924.

W. s. GUTHRIE CARBURETOR Filed Feb. 12, 1921 1 N VENT OR.

A TTORNE Y.

Patented Mar. 18, 192% OFFHCE.

WILLIAM S. GUTHRIE, OF TEE/REEL, TEXAS, ASSIGNOR TO MARVEL CARBURETOR COM- PANY, OF FLINT, MICHIGAN, A CORPORATION OF INDIANA.

CABBURETOR.

Application filed February 12, 1921. Serial No. 444,325.

To all'whom it may concern:

Be it known that I, WILLIAM S. GUTH- RIE, a citizen of the, United States, and residing at. Terrell, in the county of Kaufman and State of Texas, have invented a new and Improved Carburetor, of which the fllowing is a specification.

This invention relates to devices for heating the intake passages of internal combustion engines, especially automotive and ma rine engines, and its primary object is to provide means to accelerate the warming up of certain portions of the intake passage and maintain a good working temperature of the same when the engine is running at slow speeds.

In some respects this invention is in the same class with that shown in my United States Letters Patent No. 1,359,168 dated November 16, 1920, but has advantage over my former structure in having the heater for the intake air so arranged that its effect is less at high speed than at low speed. Another advantage resides in having. the hot spot between the carburetor and the engine so constructed that it has a tendency to retard the fiow of the heavier fuels which usually creep up the walls of the intake passage, so that while passing through the hot spot the heavy fuel is vaporized.

Another advantage resides in having a control for the heating apparatus so designed that it may be mounted within reach of the operator of the engine, as on the dash of an automobile where the driver can render the heaters operative or inoperative at will, and when operative, said heaters may be under joint control with the throttle.

In the drawing, Fig. 1 is a side elevation of an internal combustion engine having an exhaust manifold and an intake manifold embodying the invention, parts being broken away for clearness. Fig. 2 shows a sectional view of the hot spot used between the carburetor and the engine. Fig. 3 shows a modification of the hot spot. Fig. 4: is a plan of the swivel connection between the control rod and a valve. Fig. 5 is a section on the line 5-5 of Fig. 4.

Similar reference characters refer to like parts throughout the several views.

Referring to the drawing, the engine 1 has an intake passage including an air cleaner 2, an exhaust heated air chamber 3, a carburetor or charge forming device usual manner.

4, an exhaust heated chamber 5 (Fig. 2) surrounding the tubular passage 5, and an intake manifold 6. The exhaust passage 7 conveys the exhaust gases from the engine to the muffier 8. The annular passage 9 surrounds the chamber 3, andexhaust gases are supplied to this passage 9 from the exhaust passage 7 by means of the pipes 10 and 11. The pipe 10 also supplies exhaust gases to the heater l3 surrounding the chamber 5. The pipe conveys the exhaust gases from the chamber 13 back into the exhaust passage 7, and the pipe 16 conveys the exhaust gases from the chamber 9 back to the exhaust passage 7. These pipes 15 and 16 may be omitted when the smoke and noise is not objectionable. The valve 17 (shown in dotted lines) is positioned in the exhaust passage 7 for the purpose of accelerating the flow of the exhaust gases to the chambers or heaters 9 and 13, which occurs when the valve 17 is closed, or partly closed. The screw 18 and pin 18 provide means for positioning the valve 17 so that the effect of the heaters 9 and 13 may be regulated to suit the requirements of the engine. The valve 19 (shown in dotted lines) controls the flow of the exhaust gases to the heater 9, and a valve 20 may be employed to close off the flow of the exhaust gases to the heaters 9 and 13 when desired.

The fuel nozzle. 21 in the carburetor 4 supplies fuel to the intake passage in the The cold air ports 22 arranged on opposite sides to each other may be employed to admit air to the intake passage from the atmosphere, when desired, to reduce the temperature of the intake air. The air ports 22, as shown, are positioned between the choke valve 23 (shown in dotted lines) and the heater 9. A cylindrical shutter 24 is provided with ports to match the ports 22 as usual, and this shutter may be moved around so as to close the orts 22. The screw 25 provides means for ho ding the shutter in position.

The carburetor 4 is provided with the usual throttle 27, shown in dotted lines, and the rod 28 connects the throttle with the valve 19. The rod 29 connects the valves 17 and 19, and the rod 30 connects the valve 17 with the dash control device 31. The adjustable collars 32 and 33 are fastened to t e rods 28 and 30 by means of set screws 34 and 35. The coil spring 36 tends to close 7 the valve 17, and at the same time this spring tends to open the valve 19.

The rod 30 connects with the lever 17" of the valve 17 by means of a swivel connection, better shown in Figs. 4and 5. This swivel connection consists of a collar 37 having a round stem 38 extending loosely through a hole in the lever 17*, and a cotter pin 39 prevents the disengagement of the collar 37 with the lever 17*. The collar 37 is freely slidable on the rod 30. The rod 28 is connected to the valve lever 19 in a manner similar to that just described.

The chambers 3 and 5 am preferably corrugated, so that a short chamber will have a relatively large heated surface. This corrugated wall is also desirable in the chamber 5 for trapping the heavier fuels flowing up the walls of the intake passage above the carburetor. Upon reaching the corrugated section, the flow of the heavy fuels is retarded because it flows into the wrinkles out of the air current, and while moving up the highly heated corrugated walls, the heavy fuel is vaporized. The exhaust gases flowing through the heater 13 highly heat the thin corrugated section 5 of the intake passage. The vapor from the heavy fuel flows up through the ports 5 to the interior of the tube 5.

It is known that the heavy fuels crawl or creep up the walls of the intake passage to the engine cylinders and finally reach the crank case where the lubricating oil is stored, and materially dilute the oil and impair the lubricating qualities thereof.

The corrugated hot spot above described is of great value because it vaporizes the heavier fuel and utilizes the same in developing power, which not only increases fuel economy, but also prevents the lubricating oil being diluted.

It is preferred to have the corrugated section made of sheet metal such as thin copper so that the heat effect will be as great as possible when the engine is running at low speed. Acceleration of flow of exhaust gases to the heaters 9 and 13 is especially desirable at low engine speeds in order to heat them properly for the best vaporization of, the heavier fuels.

The throttle 27 is connected with the valves 17 and 19 in such manner that when the throttle is partially closed for slow speeds of the engine, the valve 17 will be closed, or partly closed. to retard the flow of the exhaust gases throughthe exhaust passage 7 and thereby cause the exhaust gases to flow very rapidly to the heaters 9 and 13. The valve 19 at this time will be open to permit the exhaust gases to flow freely to the heater 9.

Upon opening the throttle 27 for high speeds of the engine, the valve 19 will close to retard the flow of exhaust gases to the air heater 9, and the valve 17 will'simultaneously open to permit the exhaust gases to flow freely down through the pipe 7.

From the foregoing description it will be apparent that the intake air is not heated to such an extent as to very materially impair the maximum power of the engine. It will also be apparent that a hot spot similar to that described and of adequate size may be employed to properly vaporize the heavy fuel without very materially expanding the in-going charge.

Tn hot climates, or when lighter fuel is used, it may be desirable to close off the heating effect of the heaters, so I have provided a control device which may be fastened to the dash 41 of an automobile the shaft of the valve similar to that shown The swivel connections between the rods 28 and 30 as above described provide means for opening the valve 17 by pulling out the dash control button 42 without imparting movement to the throttle 27. and make it possible to operate the throttle without imparting movement to the valves 17 and 19. The dash control button 42 is held in position by means of a spring 43 pressing the ball 44. into the grooves 45.

A valve 46 may be provided to prevent the exhaust gases flowing to the air heater 9 without making the heater or hot spot 13 inoperative. The valve 20 in the pipe 10 may be closed to prevent exhaust gases flowing to the heaters 9 and 13. and valves 47 and 48 may be placed in the pipes 15 and 16 to prevent. exhaust gases entering these pipes from below, when the heaters are not in operation. The valves 47 and 48 may be held in position by any known means.

A thin metal chamber 50 having an enlarged area at the point where the heat is applied, as shown in Fig. may be substituted for the chamber 5. In a chamber of this shape, the heavy fuels creeping up the walls of the pipe below it pass out of the draft into the chamber 50 where their flow is slowed down. and in moving slowly over the hot walls of the chamber 50. the heavy fuels are vaporized and pass up through the ports 51. Sometimes a straight tubular chamber may be made of metal thin enough to vaporize the heavy fuel when suflicient exhaust heat is applied to the jacket surrounding the same.

In operation, air enters the ports 49 of the air cleaner 2, and flows up through the chamber 3, where at slow speed it is heated,

fuels pass up through the ports and flow to the intake pipe 6 with the other fuel and finally pass into the cylinders of the engine. A rod 53 may be connected to the valve 23 for limiting or choking down the-infiowing air in the usual manner. I

The valves 17 and 19 may be omitted sometimes, and the valve 20 may be connected with the throttle 27 in a manner similar to the connection betwen the throttle and the A valve 19. Again, the valves 17, 20 and 46 ling'device other'than the throttle, and the;

may be omitted, leaving the valve 19 under control of the throttle. The valves 47 and 48 may also be eliminated when desired. When the valve 19 is eliminated, a rod of greater length than shown may be employed to connect the valve 17 directly with the throttle 27. In fact, a number of desirable combinations of the various valves and con trols may be had within the scope of the present invention.

The air cleaner 2 as shown merely illustrated a suitable way of cleaning the air,

of the exhaust ases without including the air' heater 9. r a heater? for vaporizing the heavy fuels similar to that shown and described may be used without any controltube 5 may be omitted with good results, the intensity of the heat making it possible to vary the design more ,or .less. It may also be desirable under certain conditions to use a Venturi shaped tube in place of the 7 tube 5.

The valve 15 shown in the above mentioned patent is very similar to the valve 17 shown ln-the present case, and while in the present case the throttle is shown in control of this valve, it will; be apparent that I may sometime wish to employ someother control for thi valve similar to that shown in said patent.

The details of construction may vary widely from that shown in the drawings without departing from the spirit of my invention as set forth in the following claims.

I claim z 1. In combination with an internal combustion engine, of; an intake passage communicatin with said engine, a heater for heating said intake passage, means for supplying exhaust gases from the engine to said heater, a throttle for the intake passage, a valve to vary the flow of exhaust gases to said heater, means for jointly operating said throttle and said valve, and addi tional means for controlling said valve so,

that the throttle may be operated without imparting movement to said valve.

2. In combination with an internal combustion engine, of an intake passage communicatin heating said intake passage, means for supplyin exhaust gases from the engine to said eater, a throttle for the intake passage, a valve to vary the flow of exhaust gases to said heater, means for jointly operating said throttle and said valve, additional means for controlling said valve so that the throttle may be operated without imparting movement to said valve, and 'a spring tending to close said valve. 1

3. In combination with an internal combustion engine, of an intake passage. communicating with said engine, means for supplying fuel and air to said intake pasage,

with said engine, a heater for y means for heating said intake passage an- I terior to said fuel supply means by the exhaust gases from said engine, means for accelerating the flow of exhaust gases to said heating means, a valve anterior to said heating means to retard the flow of exhaust gases to said heating means, a throttle for the intake passage, and means for jointly operating said throttle and said valve.

4:. In combination with an internal combustion engine, of an intake passage communicating with said engine, means for supplying fuel and air to said intake passage,

means for heating said intake passage between said fuel supply means and the engine, means for heating said intake passage anterior to said fuel supply means, means for supplying exhaust gases from said engine to both of said heating means, a valve to accelerate the flow of exhaust gases to both of said heating means, an auxiliary air inlet device for said intake passage anterior to the fuel supply means, a throttle in the intake passage beyond said fuel supply means, and means controlling said auxiliary air inlet device independent of said throttle. 5. In combination with an internal combustion engine, of an intake passage communicating with said'engine, means for supplying fuel and air to said intake passage, means for heating said intake passage between said fuel supply means and the engine, means for heating said intake pissage anterior to said fuel supply means, means for supplying exhaust gases from said engine to both of said heating means, a valve anterior to the second mentioned heating means to retard the flow of exhaust gases thereto, a throttle, and means for jointly operating said valve and said throttle.

6. In combination with an internal combustion engine, of an intake passage communicating with said engine, means for supplying fuel to said intake passage, a heater for heating the intake passage between said without imparting movement to said valve.

7. In combination with an internal combustion engine, of an intake passage and an exhaust passage communicating with said engine, means for supplying fuel and air. to said intake passage, means for heating said intake passage anterior to said fuel supply, a conduit connecting said exhaust passage with said heating means, an air inlet device between said heating means and said fuel supply means for regulating the temperature of the air supply, a valve controlling the circulation of exhaust gases to said heating means, a throttle for the intake passage, and means for jointly operating sa1d valve with said throttle to prevent circulation of the exhaust gases to reduce the heating eflect of said heating means when the throttle is open.

8. In combination with an internal communicating with said engine, means for supplying fuel to said intake passage, a heater for heatin the intake passage between said fuel supp y means and the engine, said heater having a corrugated wall forming a partition between the heater and said intake passage, a heater for heating said intake passage anterior to said fuel supply means, means for supplying exhaust gases from the engine to said heaters, a valve to vary the flow of the exhaust gases to both of said heaters, a throttle for said intake passage, means for jointly operating said throttle and said valve, and additional means for operating said valve so that the throttle may be operated without imparting movement to said valve.

9. In combination with an internal combustion engine, of an intake passage conimunicating with said engine, means for supplying fuel to said intake passage, a heater for heating said intake passage between said fuel su ply means and the engine, a heater for eating said intake pas means for supplying exhaust gases from the engine to said heaters, a valve to vary the flow of exhaust gases to both of said heaters, a throttle for said intake passage, means for jointly operating said throttle and said valve, and additional means for controlling said valve so that the throttle may be operated Without imparting movement to said valve.

10. In combination with an internal combustion engine, of an exhaust passage and an intake passage communicating with said engine, a heater for heating said intake passage, means for supplying exhaust gases from said exhaust passage to said heater, a throttle controlling the flow of fluid through said intake passage, a valve to varythe flow of exhaust gases to said heater, means for jointly operating said throttle and said valve, and additional means for controlling said valve so that said throttle may be operated without imparting movement to said valve. 11. In combination with an internal combustion engine, of an exhaust passage and an intake. passage communicating with said engine, a heater for heating said intake passage, means for supplying exhaust gases from said exhaust passage to said heater, a throttle controlling the flow of fluid through said intake passage, a valve to vary the flow of exhaust gases to said heater, means for jointly operating said throttle and said valve, additional means for controlling said valve so that said throttle may be operated without imparting movement to said valve, and a spring tending to actuate said valve.

12. In combination with an internal combustion engine, of an exhaust passage and an intake passage communicating with said engine, a heater for heating said intake passage, means for supplying exhaust gases from said exhaust passage to said heater, a throttle controlling the flow of fluid through said intake passage, a valve anterior to said heater to retard the flow of exhaust gases o v said heater, means for jointly operating said throttle and said valve, and a valve in said exhaust passage to accelerate the flow of exhaust gases to said heater.

13. In combination with an internal com bustion engine, of an exhaust passage and an intake passage communicating with said engine, means for supplying fuel to said intake passage, a heater for heating said in-.

takepassage between said fuel supply means and the engine, a heater for heating said in take passage anterior to said fuel supply means, means for supplying exhaust gases from said exhaust passage to both of said heaters, a valve in said exhaust passage to accelerate the flow of exhaust gases to both of said heaters, a throttle for said intake passage, means for jointly operating said throttle and said valve, means to regulate the temperature of the air supply, and means independent of said throttle for controlling said latter means.

1%. In combination with an internal combustion engine, of an exhaust passage and an intake passage communicating with said engine, means for supplying fuel to said intake passage, a heater for heating said intake passage between said fuel supply means and the engine, a heater for heating said intake passage anterior to said fuel supply means, means for supplying exhaust gases from said exhaust passage to both of said heaters, a valve in said exhaust passage to accelerate the flow of exhaust gases to both of said heaters, a throttle for said intake passage, a valve to retard the flow of exhaust gases to the second mentioned heater, and means for jointly operating said throttle and said valves.

15. In combination with an internal combustion engine, of an exhaust passage and an intake passage communicating with said engine, means for supplying fuel to said intake passage, a heater for heating said intake passage between said fuel supply means and the engine, a heater for heating said intake passage anterior to said fuel supply means, means for supplying exhaust gases from said exhaust passage to both of said heaters a valve in said exhaust passage to accelerate the flow of exhaust gases to both of said heaters, a throttle for said intake passage, a valve to retard the flow of exhaust gases to the second mentioned heater, means for jointly operating said throttle and said valves, and additional means provided to permit said throttle to be operated without imparting movement to one of said valves. 16. In combination with an internal combustion engine, of an exhaust passage and an intake passage communicating with said engine, means for supplying fuel to said intake passage,a heater for heating said intake passage between said fuel supply means and the engine, a heater for heating said intake passage anterior to said fuel supply means, means for supplying exhaust gases from said exhaust passage to both of said heaters, a valve in said exhaust passage to accelerate the flow of exhaust gases to both of said heaters, a throttle for said intake passage, a valve to retard the flow of exhaust gases to the second mentioned heater, means for jointly operating said throttle and said valves, and additional means controlling said valves so that said throttle may be operated without imparting movement to said valves.

17. In combination with an internal combustion engine, of, an intake passage communicating with said engine, means for supplying fuel to said intake passage, a chamber partitioned ofi from said intake passage and having an inlet from said intake passage between said fuel supply means and said engine, an outlet from said chamber to said intake passage, said outlet being separate and distinct from said inlet, a heater for heating said chamber, means for supplying exhaust gases from said engine to said heater, a valve to accelerate the flow of exhaust gases to said heater, a throttle, and means for jointly operating said valve and said throttle.

18. In combination with an internal combustion engine, of an intake passage communicating with said engine, means for supplying fuel to said intake passage, a chamber partitioned ofl from said intake passage and having an inlet from said intake passage between said fuel supply means and said engine, an outlet from said chamber to said intake passage, said outlet being separate and distinct from said inlet, a heater for heating said chamber, means for supplying exhaust gases from the engine to said heater, a valve" to accelerate the flow of exhaust gases to said heater, a throttle for said in take passage, and means for jointly operating said throttle andsaid valve.

19. In combination with an internal combustion engine, of an intake passage communicating with said engine, means for supplying fuel to said intake passage, a chamber communicating with said intake passage between said fuel supply means and said engine, a heater for heating said chamber, means for supplying exhaust gases from the engine to said heater, a valve to vary the fiow of exhaust gases to said heater, a throt- 7 tie for said intake passage, means for jointly operating said throttle and said valve, and additional means controlling said valve so that said throttle may be operated without imparting movement to said valve.

20. In combination with an internal combustion engine, of an exhaust passage and an intake passage communicating with said engine, a throttle for said intake passage,

means for supplying fuel and air to said intake passage, an air heater for heating said intake passage anterior to said fuel supply I 15 said intake passage, a heater for heating saidintake passage anterior to said fuel suptea ply means, means for supplying exhaust gases to said heater, a valve to vary the flow of exhaust gases to said heat a t.

valve to retard the flow of exhaust gases to said heater, a throttle for the intake passage, means for jointly operating said throttle and said valves, and additional means controlling said valves so that said throttle may be operated Without imparting movement to said valves.

22. In combination With an internal combustion engine, of an exhaust passage and an intake passage communicating with said engine, means for supplying fuel .and air to said intake passage, a heater for heating said intake passage anterior to said fuel supply means, means for supplying exhaust gases from the engine to said heater, a valve in said exhaust passage to vary the heating elfect of said heater, a valve to retard the flow of exhaust gases to said heater, a throttle for the intake passage, means for jointly operating said throttle and said valves.

Signed at Detroit, Michigan, this 10th day of February, 1921.

WILLIAM S. GUTHRIE.

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