US2635597A - Carburetor heat deflector - Google Patents
Carburetor heat deflector Download PDFInfo
- Publication number
- US2635597A US2635597A US76008A US7600849A US2635597A US 2635597 A US2635597 A US 2635597A US 76008 A US76008 A US 76008A US 7600849 A US7600849 A US 7600849A US 2635597 A US2635597 A US 2635597A
- Authority
- US
- United States
- Prior art keywords
- carburetor
- heat
- deflector
- fuel
- engine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M15/00—Carburettors with heating, cooling or thermal insulating means for combustion-air, fuel, or fuel-air mixture
- F02M15/06—Heat shieldings, e.g. from engine radiations
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S261/00—Gas and liquid contact apparatus
- Y10S261/81—Percolation control
Definitions
- This invention relates to fuel feed means for internal combustion engines and consists particularly in novel means for shielding and deflecting engine heat therefrom.
- a carburetor or other adjunct of the fuel system includes an accumulating or storage chamber for volatile fuel
- engine heat sometimes affects the stored fuel so as to cause boiling or so-called percolation. Since this condition results most frequently just after stopping of a fully heated engine, it may delay restarting of the engine and it also may affect the accelerating pump 50 that an insufficient quantity of liquid fuel is supplied for the pick up charge.
- a more detailed object is to provide such a heat shield which deflects engine heat from all sides as well as from beneath the device while permitting the escape of heat upwardly therefrom.
- FIG. 1 is a side view and vertical, transverse section illustrating an internal combustion engine carburetor having the invention applied thereto.
- Fig. 2 is a top view of the heat shield alone.
- the carburetor illustrated is of a well-known down-draft type including a mixture barrel 5 having a Venturi tube 6 traversed by a jet bar 7.
- the usual choke valve 8 and throttle valve 9 are provided at the inlet and outlet portions of the barrel.
- Adjacent the barrel is a constant level fuel chamber 10 enclosing a float H which acts on a needle valve I2 in inlet [3, for connection to the usual fuel pump (not shown), for maintaining a substantially uniform level of fuel in the bowl.
- the main fuel supply is through metering orifice element M and main nozzle passage I5 discharging through lateral openings IS in jet bar 7 into Venturi tube 6.
- Well known idling and accelerating pump systems are also provided, as is customary.
- the carburetor is mounted on the engine intake manifold, indicated at l8, and projects above the same. Heat from the manifold system radiates upwardly and that from the engine radiates sidewardly and upwardly toward the carburetor.
- a deflector l9 conveniently of sheet metal with polished outer surface, is provided. This deflector, in the present instance, is in the shape of a cup or an inverted bell and is clamped between the main body casting 20 and heat insulating gasket 2! between said body 20 and the throttle .body casting 22.
- This shield or deflector completely surrounds the carburetor and, particularly, bowl l0, and also underlies the same so as to effectively deflect radiant heat therefrom.
- the deflector is slightly spaced on all sides from the carburetor so that an insulating air cushion is rovided and is wholly open at the top to permit escape of heat from the carburetor.
- a fuel feed device including a fuel chamber, and an inverted bell-shaped deflector of sheet metal formed with an outwardly flaring upper marginal edge portion receiving said chamber but spaced therefrom, said deflector extending at least as high as said chamber and shielding said chamber from engine heat on all sides and from below, said deflector being wholly open at the top to permit the upward escape of heat from said device and chamber.
Description
April 21, 1953 D. BOYCE CARBURETOR HEAT DEFLECTOR INVENTOR. LEONARD D. BOYCE Filed Feb. 12. 1949 ATTORNEY FIG.2.
Patented Apr. 21, 1953 UNITED STATES PATENT OFFICE CARBURETOR HEAT DEFLECTOR Application February 12, 1949, Serial No. 76,008
1 Claim. 1
This invention relates to fuel feed means for internal combustion engines and consists particularly in novel means for shielding and deflecting engine heat therefrom.
Where a carburetor or other adjunct of the fuel system includes an accumulating or storage chamber for volatile fuel, engine heat sometimes affects the stored fuel so as to cause boiling or so-called percolation. Since this condition results most frequently just after stopping of a fully heated engine, it may delay restarting of the engine and it also may affect the accelerating pump 50 that an insufficient quantity of liquid fuel is supplied for the pick up charge.
It is the main object of the present invention to provide means for effectively shielding a fuel feed device, such as a carburetor, from engine heat.
A more detailed object is to provide such a heat shield which deflects engine heat from all sides as well as from beneath the device while permitting the escape of heat upwardly therefrom.
These objects and other more detailed objects are attained by the device and structure illustrated in the accompanying drawing in which Fig. 1 is a side view and vertical, transverse section illustrating an internal combustion engine carburetor having the invention applied thereto.
Fig. 2 is a top view of the heat shield alone.
The carburetor illustrated is of a well-known down-draft type including a mixture barrel 5 having a Venturi tube 6 traversed by a jet bar 7. The usual choke valve 8 and throttle valve 9 are provided at the inlet and outlet portions of the barrel. Adjacent the barrel is a constant level fuel chamber 10 enclosing a float H which acts on a needle valve I2 in inlet [3, for connection to the usual fuel pump (not shown), for maintaining a substantially uniform level of fuel in the bowl. The main fuel supply is through metering orifice element M and main nozzle passage I5 discharging through lateral openings IS in jet bar 7 into Venturi tube 6. Well known idling and accelerating pump systems (not shown) are also provided, as is customary.
The carburetor is mounted on the engine intake manifold, indicated at l8, and projects above the same. Heat from the manifold system radiates upwardly and that from the engine radiates sidewardly and upwardly toward the carburetor. In order to shield the carburetor from this heat, a deflector l9, conveniently of sheet metal with polished outer surface, is provided. This deflector, in the present instance, is in the shape of a cup or an inverted bell and is clamped between the main body casting 20 and heat insulating gasket 2! between said body 20 and the throttle .body casting 22. This shield or deflector completely surrounds the carburetor and, particularly, bowl l0, and also underlies the same so as to effectively deflect radiant heat therefrom.
The deflector is slightly spaced on all sides from the carburetor so that an insulating air cushion is rovided and is wholly open at the top to permit escape of heat from the carburetor.
I have found that by applying my novel heat deflector shield to a carburetor applied to an automotive engine, the fuel temperature in the constant level bowl is reduced as much as F., or sufiiciently to greatly reduce boiling in the fuel bowl and fuel passages of the carburetor. While a deflector with a polished outer surface works effectively, the part may be constructed itself of insulating material or may have an insulating wrapping or coating applied thereto.
The invention may be modified in these and other respects as will occur to those skilled in the art and the exclusive use of all modifications as come within the scope of the appended claim is contemplated.
I claim:
In an internal combustion engine, a fuel feed device including a fuel chamber, and an inverted bell-shaped deflector of sheet metal formed with an outwardly flaring upper marginal edge portion receiving said chamber but spaced therefrom, said deflector extending at least as high as said chamber and shielding said chamber from engine heat on all sides and from below, said deflector being wholly open at the top to permit the upward escape of heat from said device and chamber.
LEONARD D. BOYCE.
References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,596,173 Goode Aug. 17, 1926 1,789,005 Larkin Jan. 13, 1931 FOREIGN PATENTS Number Country Date 880,587 France Jan. 4, 1943
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US76008A US2635597A (en) | 1949-02-12 | 1949-02-12 | Carburetor heat deflector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US76008A US2635597A (en) | 1949-02-12 | 1949-02-12 | Carburetor heat deflector |
Publications (1)
Publication Number | Publication Date |
---|---|
US2635597A true US2635597A (en) | 1953-04-21 |
Family
ID=22129344
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US76008A Expired - Lifetime US2635597A (en) | 1949-02-12 | 1949-02-12 | Carburetor heat deflector |
Country Status (1)
Country | Link |
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US (1) | US2635597A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1114361B (en) * | 1959-08-08 | 1961-09-28 | E H Fr Nallinger Dr Ing | Carburetors for internal combustion engines, especially for motor vehicles |
US3593694A (en) * | 1969-05-05 | 1971-07-20 | Fuel Injection Eng Co | Fuel-cooling system |
US3916860A (en) * | 1972-08-10 | 1975-11-04 | Honda Motor Co Ltd | Carburetor heat shield apparatus |
DE2648490A1 (en) * | 1975-10-27 | 1977-05-12 | Honda Motor Co Ltd | COMBUSTION MACHINE |
US4446822A (en) * | 1981-05-25 | 1984-05-08 | Kioritz Corporation | Heat insulating mounting device for carburetor |
US4503833A (en) * | 1981-10-19 | 1985-03-12 | Motortech, Inc. | Apparatus and operating method for an internal combustion engine |
US6595775B1 (en) | 2000-09-18 | 2003-07-22 | Pulpdent Corporation | Dental mirror |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1596173A (en) * | 1922-11-25 | 1926-08-17 | White Motor Co | Attachment for carburetors |
US1789005A (en) * | 1929-11-22 | 1931-01-13 | Charles A Criqui | Drip pan for carburetors |
FR880587A (en) * | 1941-01-10 | 1943-03-30 | Pallas Apparate Gmbh | air cleaner mounted on a casing provided with air suction pipes arranged around the carburetor of combustion machines |
-
1949
- 1949-02-12 US US76008A patent/US2635597A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1596173A (en) * | 1922-11-25 | 1926-08-17 | White Motor Co | Attachment for carburetors |
US1789005A (en) * | 1929-11-22 | 1931-01-13 | Charles A Criqui | Drip pan for carburetors |
FR880587A (en) * | 1941-01-10 | 1943-03-30 | Pallas Apparate Gmbh | air cleaner mounted on a casing provided with air suction pipes arranged around the carburetor of combustion machines |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1114361B (en) * | 1959-08-08 | 1961-09-28 | E H Fr Nallinger Dr Ing | Carburetors for internal combustion engines, especially for motor vehicles |
US3593694A (en) * | 1969-05-05 | 1971-07-20 | Fuel Injection Eng Co | Fuel-cooling system |
US3916860A (en) * | 1972-08-10 | 1975-11-04 | Honda Motor Co Ltd | Carburetor heat shield apparatus |
DE2648490A1 (en) * | 1975-10-27 | 1977-05-12 | Honda Motor Co Ltd | COMBUSTION MACHINE |
US4099496A (en) * | 1975-10-27 | 1978-07-11 | Honda Giken Kogyo Kabushiki Kaisha | Carburetor heat shield |
US4446822A (en) * | 1981-05-25 | 1984-05-08 | Kioritz Corporation | Heat insulating mounting device for carburetor |
US4503833A (en) * | 1981-10-19 | 1985-03-12 | Motortech, Inc. | Apparatus and operating method for an internal combustion engine |
US6595775B1 (en) | 2000-09-18 | 2003-07-22 | Pulpdent Corporation | Dental mirror |
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