US2925242A - Throttle valve having flow passages for minimizing drift - Google Patents
Throttle valve having flow passages for minimizing drift Download PDFInfo
- Publication number
- US2925242A US2925242A US350996A US35099653A US2925242A US 2925242 A US2925242 A US 2925242A US 350996 A US350996 A US 350996A US 35099653 A US35099653 A US 35099653A US 2925242 A US2925242 A US 2925242A
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- United States
- Prior art keywords
- throttle valve
- piston
- flow passages
- throttle
- land
- 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
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0686—Braking, pressure equilibration, shock absorbing
- F16K31/0693—Pressure equilibration of the armature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K3/00—Plants including a gas turbine driving a compressor or a ducted fan
Definitions
- the present invention relates generally to a fuel control unit to be used in conjunction with an electronic uid control circuit of the type disclosed in the copending applications of Oiner Serial Nos. 13,546, now United States Patent 2,573,596, and 770,872.
- This disclosure emphasizes features of the throttle valve incorporated in the fuel control unit.
- An object of the present invention is to provide an improved balanced throttle valve wherein liow through the valve is controlled by positioning a balanced floating piston.
- Figure l is a view in elevation, partly in section, of the throttle unit
- FIG. 2 is a view in elevation partly in section of the throttle unit-of the invention.
- the throttle valve 19 comprises a valve body having a cylindrical bore closed by end plates 117, and is provided with a port 39 communicating with the upper end of the throttle valve and a port 43 communicating with the lower end thereof as hereinafter described.
- the function of the throttle valve 19 is to meter flow to a nozzle or the like. It is composed of a freeoating hydraulically balanced piston 105 having upper and lower lands 113 and 116 respectively controlling orifices 106 and 107 formed in a throttle valve sleeve 108.
- the fuel ows into an annular passage 110 suitably connected to a source of tiuid under pressure (not shown). From the annular passage 110 in the throttle valve body, the fuel iows through the metering port 106 into sleeve 108 and out through port 107 and thence out the outlet 112.
- the upper piston land 113 is provided with a groove 114 and a leakage path is formed by holes 115 to balance the pressure in the center zone between the upper piston land 113 and the lower piston land 116.
- the throttle valve is positioned by applying differential pressure into chambers 153 and 154.
- the differential pressure between the chambers 153 and 154 reduces to zero and it thus becomes important for the leakages across the upper and lower throttle valve piston lands t0 be equal.
- Unequal leakages across these lands change 'ice N the differential pressures in the chambers 153 and 154 llilgmpson Ramo Wooldridge Inc., a corporation of and cause the piston to move without having any signal from the servo system.
- t j j A j 1 Accordingly, the purpose and the advantages of groove 114 and holes 115 are to overcome such difficulties.
- the throttle housing 19 is provided with upper and lower closures 117 suitably affixed to the housing for assembling the piston and the sleeve 108. Upper and lower adjusting stops 118 and 119 are provided for limit,- ing piston 105 to a predetermined range of movement.
- a starting solenoid 50 adaptedA to -push Vout when ⁇ energized, is mounted as illustrated in Figure 2, and provides a throttle stop during starting to prevent over-travel of the throttle valve piston.
- the solenoid 50 includes a winding 50a adapted to move a piston 50b outwardly when energized by the line 52 from the electronic control.
- An idle solenoid 51 is also provided and forms an idle fuel ow stop for the throttle valve piston during normal operation.
- the idle solenoid 51 is shown normally biased outwardly in the path of movement of the throttle valve piston 105.
- the solenoid 51 thus includes spring means 19 for biasing the piston 51b outwardly as described, retraction being afforded by the winding 51C to include the line 53 from which the electronic control is connected.
- the throttle valve 19 is provided with passages 120 and 121 connected to chambers formed above and below the upper piston land 122 and the lower piston land 116. These passages 120 and 121 are connected to the ports 39 and 43.
- the piston is relieved as at a.
- High pressure fuel or uid is allowed to ow upward by the metering land and into the upper throttle valve chamber 153 through the passage 120 closing the throttle valve. Fuel in the lower throttle chamber 154 is vented to the lower pressure port 148.
- a throttle valve comprising a sleeve having an inlet port and an outlet port, a piston valve slidable in said sleeve to control the ow of uid through said ports and including a first land and a second land spaced longitudinally therefrom, said lands being of different longitudinal dimension wherein the longer of said lands will completely overlie one of said ports in one position of said piston, and passage means including an annular peripheral groove in said longer of said lands and interconnecting said inlet and outlet ports whenever said piston is in said one position, thereby to insure a ow passage between said ports and balancing pressure differentials therebetween.
- a throttle valve comprising a sleeve having an inlet portand an outlet port, ⁇ a piston valve slidable in said sleeve to control the :flow of uid through said ports and including a first landland a second land spaced lngitudinally therefrom, 'said'lands being of different longitudinaldmeusion wherein the longer 'of said lands will completely overlie one of said ports in one position of?
- piston,k and' passage means including an annular peripheral'groovein said longer of said landsland interonnectingfsaidjnlet and outlet vports whenever said piston" -isin said one position, thereby to insure a ow passage between said ports and balancing pressure differentials therebetween, means on each of the opposite ends of ⁇ said"fpiston frming a motive-surface n a pressure Vcontrol chamber to hydraulically position said pistouv in.
- said' sleeve a pair of longitudinally spaced openingsinsaid fsleeve at opposite ends of said piston, a' first solenoid operated 'stop' means including an adjustableprojectionextending through one of said spaced openings toprevent ⁇ overtravel of the piston, and a second-solenoidope'rated stop means including a second adjustable 'prectioneXend-ing through the other of said openings ⁇ insaid sleeve to-form a throttle stop at the other end of ysaid pis/ton.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuel-Injection Apparatus (AREA)
Description
Feb. 16, 1960 T c. NOON ETAL THROTTLE VALVE HAVING FLOW PASSAGES FOR MINIMIZING DRIFT Original Filed April 27. 1949 I f, A/
` THROTI'LE VALVE HAVING FLOW PASSAGES FOR MINIMIZING DRIFT T' Cyril Noon, Bainbridge Township, Geauga County, and Walter R. Chapman, Bedford, Ohio, assignors to Original application April 27, 1949, Serial No. 89,884, now Patent No. 2,707,866, dated May 10, 1955. Di-
vided and this application April 24, 1953, Serial No. l
The subject matter of this disclosure constitutes a division of our copending application Serial No. 89,884, i
led April 27, 1949, issued as United States Patent No.
v The present invention relates generally to a fuel control unit to be used in conjunction with an electronic uid control circuit of the type disclosed in the copending applications of Oiner Serial Nos. 13,546, now United States Patent 2,573,596, and 770,872.
This disclosure emphasizes features of the throttle valve incorporated in the fuel control unit.
An object of the present invention is to provide an improved balanced throttle valve wherein liow through the valve is controlled by positioning a balanced floating piston.
Many other features, advantages and additional objects of the present invention will become manifest to those versed in the art upon making reference to the detailed description which follows and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention are shown by way of illustrative example.
Figure l is a view in elevation, partly in section, of the throttle unit;
Figure 2 is a view in elevation partly in section of the throttle unit-of the invention.
For an understanding of the environment in which the throttle valve 19 of the invention may be utilized reference is made to applicants parent Patent No. 2,707,866, issued May, 10, 1955. The throttle valve 19 comprises a valve body having a cylindrical bore closed by end plates 117, and is provided with a port 39 communicating with the upper end of the throttle valve and a port 43 communicating with the lower end thereof as hereinafter described.
The function of the throttle valve 19 is to meter flow to a nozzle or the like. It is composed of a freeoating hydraulically balanced piston 105 having upper and lower lands 113 and 116 respectively controlling orifices 106 and 107 formed in a throttle valve sleeve 108. In Figure l, the fuel ows into an annular passage 110 suitably connected to a source of tiuid under pressure (not shown). From the annular passage 110 in the throttle valve body, the fuel iows through the metering port 106 into sleeve 108 and out through port 107 and thence out the outlet 112.
Referring to Figure l, the upper piston land 113 is provided with a groove 114 and a leakage path is formed by holes 115 to balance the pressure in the center zone between the upper piston land 113 and the lower piston land 116. In operation, the throttle valve is positioned by applying differential pressure into chambers 153 and 154. When the steady state condition exists, the differential pressure between the chambers 153 and 154 reduces to zero and it thus becomes important for the leakages across the upper and lower throttle valve piston lands t0 be equal. Unequal leakages across these lands change 'ice N the differential pressures in the chambers 153 and 154 llilgmpson Ramo Wooldridge Inc., a corporation of and cause the piston to move without having any signal from the servo system. t j j A j 1 Accordingly, the purpose and the advantages of groove 114 and holes 115 are to overcome such difficulties. The
A starting solenoid 50 adaptedA to -push Vout when` energized, is mounted as illustrated in Figure 2, and provides a throttle stop during starting to prevent over-travel of the throttle valve piston. The solenoid 50 includes a winding 50a adapted to move a piston 50b outwardly when energized by the line 52 from the electronic control.
An idle solenoid 51 is also provided and forms an idle fuel ow stop for the throttle valve piston during normal operation. In Figure 2, the idle solenoid 51 is shown normally biased outwardly in the path of movement of the throttle valve piston 105. The solenoid 51 thus includes spring means 19 for biasing the piston 51b outwardly as described, retraction being afforded by the winding 51C to include the line 53 from which the electronic control is connected.
Referring to Figure 2, the throttle valve 19 is provided with passages 120 and 121 connected to chambers formed above and below the upper piston land 122 and the lower piston land 116. These passages 120 and 121 are connected to the ports 39 and 43.
In order to prevent a suction pull on the piston 105 by the local low static pressure which may be produced by increased velocity ow of huid through the port 106,
the piston is relieved as at a.
High pressure fuel or uid is allowed to ow upward by the metering land and into the upper throttle valve chamber 153 through the passage 120 closing the throttle valve. Fuel in the lower throttle chamber 154 is vented to the lower pressure port 148.
While we have resorted to detail in the description of our invention for the sake of clarity, it will, of course, be understood that many modifications `with respect to various details will suggest themselves to those versed in the art which will not mark a departure from the true spirit of our invention. We desire to incorporate within the scope of the patent warranted hereon all such modiications as reasonably and properly come within the scope of our contribution to the art.
We claim as our invention:
1. A throttle valve comprising a sleeve having an inlet port and an outlet port, a piston valve slidable in said sleeve to control the ow of uid through said ports and including a first land and a second land spaced longitudinally therefrom, said lands being of different longitudinal dimension wherein the longer of said lands will completely overlie one of said ports in one position of said piston, and passage means including an annular peripheral groove in said longer of said lands and interconnecting said inlet and outlet ports whenever said piston is in said one position, thereby to insure a ow passage between said ports and balancing pressure differentials therebetween. i
2; A throttle valve comprising a sleeve having an inlet portand an outlet port,` a piston valve slidable in said sleeve to control the :flow of uid through said ports and including a first landland a second land spaced lngitudinally therefrom, 'said'lands being of different longitudinaldmeusion wherein the longer 'of said lands will completely overlie one of said ports in one position of? ,said piston,k and' passage means including an annular peripheral'groovein said longer of said landsland interonnectingfsaidjnlet and outlet vports whenever said piston" -isin said one position, thereby to insure a ow passage between said ports and balancing pressure differentials therebetween, means on each of the opposite ends of` said"fpiston frming a motive-surface n a pressure Vcontrol chamber to hydraulically position said pistouv in. said' sleeve, a pair of longitudinally spaced openingsinsaid fsleeve at opposite ends of said piston, a' first solenoid operated 'stop' means including an adjustableprojectionextending through one of said spaced openings toprevent `overtravel of the piston, and a second-solenoidope'rated stop means including a second adjustable 'prectioneXend-ing through the other of said openings `insaid sleeve to-form a throttle stop at the other end of ysaid pis/ton.
lReferences Cited in the `lle of this patent Ik u UNITED STATES PATENTS Sewall June 10, 1890 Crowe July 19, 1904 Goodlett Mar. 13, 1906 Luna May 24,1910 Ledoux Aug. 8, 1811 Frost Man 30, 1926l Cordier .Man 31, '1931 McGuire .A\`1g.. 29,' 1933 Been Mar. 16,. 1937 Cox July 26, 1938 Jung Oct. '29,v 1.940' SeippelV Nov. 25,1941 Warren Dec..25 1945 Petry Mar. 1,'1949 Evans et al. July 18, 1950 Carey July 10, 1951 Coar Jan. 22,1952," i Beckett et al. Feb. 26, 1952 West et al May`6, 1952 Miller July 29, 1952' Maha Nov. 4/1952
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US350996A US2925242A (en) | 1949-04-27 | 1953-04-24 | Throttle valve having flow passages for minimizing drift |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US89884A US2707866A (en) | 1949-04-27 | 1949-04-27 | Jet engine fuel control system responsive to engine speed and tail pipe temperature |
US350996A US2925242A (en) | 1949-04-27 | 1953-04-24 | Throttle valve having flow passages for minimizing drift |
Publications (1)
Publication Number | Publication Date |
---|---|
US2925242A true US2925242A (en) | 1960-02-16 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US350996A Expired - Lifetime US2925242A (en) | 1949-04-27 | 1953-04-24 | Throttle valve having flow passages for minimizing drift |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3292651A (en) * | 1963-09-18 | 1966-12-20 | Innocenti Boris | Gas flow controlling device |
US3447778A (en) * | 1966-04-06 | 1969-06-03 | Lucas Industries Ltd | Variable flow metering device |
US3463188A (en) * | 1965-10-23 | 1969-08-26 | St Louis Diecasting Corp | Shot speed control valve and method of controlling the speed of a shot cylinder ram |
US4099703A (en) * | 1976-10-12 | 1978-07-11 | Ideal-Aerosmith, Inc. | Self-cleaning precision metering valve |
US20130000035A1 (en) * | 2011-06-29 | 2013-01-03 | Wedi Gmbh | Wastewater Drain With Odor Trap |
Citations (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US430089A (en) * | 1890-06-10 | sewall | ||
US765561A (en) * | 1903-06-15 | 1904-07-19 | Davy Bros Ltd | Safety controlling-gear for fluid-pressure engines. |
US814838A (en) * | 1905-04-27 | 1906-03-13 | Joseph E J Goodlett | Stop mechanism for steam-engines. |
US959022A (en) * | 1909-08-07 | 1910-05-24 | Elmer Jacobson | Regulating-valve for air-brake systems. |
US1000022A (en) * | 1910-07-30 | 1911-08-08 | John W Ledoux | Valve mechanism. |
US1578887A (en) * | 1924-10-07 | 1926-03-30 | Clyde Iron Works | Throttle control for gas engines and the like |
US1798973A (en) * | 1929-03-20 | 1931-03-31 | Sipro Ets | Control device for valves |
US1924250A (en) * | 1932-05-17 | 1933-08-29 | Fred W Walden | Automatic drain valve |
US2073604A (en) * | 1935-01-12 | 1937-03-16 | United American Bosch Corp | Fuel distributing valve |
US2125066A (en) * | 1937-04-01 | 1938-07-26 | Fed Aircraft Corp | Internal combustion engine control |
US2219994A (en) * | 1937-09-24 | 1940-10-29 | Bbc Brown Boveri & Cie | Gas turbine plant and regulating system therefor |
US2263705A (en) * | 1940-01-15 | 1941-11-25 | Bbc Brown Boveri & Cie | Gas turbine plant |
US2391531A (en) * | 1943-04-15 | 1945-12-25 | Henry E Warren | Balanced valve |
US2463052A (en) * | 1944-03-09 | 1949-03-01 | Du Mont Allen B Lab Inc | Vacuum valve |
US2505079A (en) * | 1948-09-03 | 1950-04-25 | Int Minerals & Chem Corp | Manufacture of gel compositions |
US2516050A (en) * | 1947-09-26 | 1950-07-18 | Quentin J Evans | Adjustable centrifugal switch |
US2559938A (en) * | 1947-12-03 | 1951-07-10 | Dowty Equipment Ltd | Speed governor mechanism for aircraft internal-combustion turbine engines |
US2583470A (en) * | 1945-02-06 | 1952-01-22 | United Aircraft Corp | Fuel control for exhaust turbine power plants having internalcombustion gas generators |
US2586906A (en) * | 1947-10-01 | 1952-02-26 | Heber W Harcum | Valve |
US2595621A (en) * | 1949-10-27 | 1952-05-06 | Jr Willis Z West | Centrifugal switch |
US2616449A (en) * | 1947-12-26 | 1952-11-04 | Hannifin Corp | Pilot operated solenoid controlled valve |
-
1953
- 1953-04-24 US US350996A patent/US2925242A/en not_active Expired - Lifetime
Patent Citations (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US430089A (en) * | 1890-06-10 | sewall | ||
US765561A (en) * | 1903-06-15 | 1904-07-19 | Davy Bros Ltd | Safety controlling-gear for fluid-pressure engines. |
US814838A (en) * | 1905-04-27 | 1906-03-13 | Joseph E J Goodlett | Stop mechanism for steam-engines. |
US959022A (en) * | 1909-08-07 | 1910-05-24 | Elmer Jacobson | Regulating-valve for air-brake systems. |
US1000022A (en) * | 1910-07-30 | 1911-08-08 | John W Ledoux | Valve mechanism. |
US1578887A (en) * | 1924-10-07 | 1926-03-30 | Clyde Iron Works | Throttle control for gas engines and the like |
US1798973A (en) * | 1929-03-20 | 1931-03-31 | Sipro Ets | Control device for valves |
US1924250A (en) * | 1932-05-17 | 1933-08-29 | Fred W Walden | Automatic drain valve |
US2073604A (en) * | 1935-01-12 | 1937-03-16 | United American Bosch Corp | Fuel distributing valve |
US2125066A (en) * | 1937-04-01 | 1938-07-26 | Fed Aircraft Corp | Internal combustion engine control |
US2219994A (en) * | 1937-09-24 | 1940-10-29 | Bbc Brown Boveri & Cie | Gas turbine plant and regulating system therefor |
US2263705A (en) * | 1940-01-15 | 1941-11-25 | Bbc Brown Boveri & Cie | Gas turbine plant |
US2391531A (en) * | 1943-04-15 | 1945-12-25 | Henry E Warren | Balanced valve |
US2463052A (en) * | 1944-03-09 | 1949-03-01 | Du Mont Allen B Lab Inc | Vacuum valve |
US2583470A (en) * | 1945-02-06 | 1952-01-22 | United Aircraft Corp | Fuel control for exhaust turbine power plants having internalcombustion gas generators |
US2516050A (en) * | 1947-09-26 | 1950-07-18 | Quentin J Evans | Adjustable centrifugal switch |
US2586906A (en) * | 1947-10-01 | 1952-02-26 | Heber W Harcum | Valve |
US2559938A (en) * | 1947-12-03 | 1951-07-10 | Dowty Equipment Ltd | Speed governor mechanism for aircraft internal-combustion turbine engines |
US2616449A (en) * | 1947-12-26 | 1952-11-04 | Hannifin Corp | Pilot operated solenoid controlled valve |
US2505079A (en) * | 1948-09-03 | 1950-04-25 | Int Minerals & Chem Corp | Manufacture of gel compositions |
US2595621A (en) * | 1949-10-27 | 1952-05-06 | Jr Willis Z West | Centrifugal switch |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3292651A (en) * | 1963-09-18 | 1966-12-20 | Innocenti Boris | Gas flow controlling device |
US3463188A (en) * | 1965-10-23 | 1969-08-26 | St Louis Diecasting Corp | Shot speed control valve and method of controlling the speed of a shot cylinder ram |
US3447778A (en) * | 1966-04-06 | 1969-06-03 | Lucas Industries Ltd | Variable flow metering device |
US4099703A (en) * | 1976-10-12 | 1978-07-11 | Ideal-Aerosmith, Inc. | Self-cleaning precision metering valve |
US20130000035A1 (en) * | 2011-06-29 | 2013-01-03 | Wedi Gmbh | Wastewater Drain With Odor Trap |
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