![]() Method and device for preparing fuel-air mixture
专利摘要:
1513454 Fuel flow regulation DRESSER INVESTMENTS NV 11 June 1975 [3 July 1974] 25090/75 Heading F1H Fuel flow regulating apparatus comprises a turbulent-flow valve and means for applying a fixed pressure bias to the fuel upstream of the valve such that the mass flow-rate of fuel through the valve varies directly with variations in the pressure differential across the valve within a selected pressure range to facilitate the maintenance of an air-fuel mixture independent of variations in atmospheric pressure. The apparatus may comprise a mixing device 12 with converging and diverging zones 14, 18 connected by a constricted zone 16 for producing sonic flow, fuel being supplied either at or slightly upstream of zone 16 from a source 23 via line 27 containing a needle valve 26 which governs the flow of fuel in proportion to the cross-sectional area of zone 16 by way of a motivator 28 connected to a movable wall 42 which may be coupled to a throttle pedal. A negative pressure bias is taken from the intake manifold 20 and applied to the fuel source 23 via line 30 containing an adjustable pressure regulator 32 referenced to atmospheric pressure by a vent 34. Alternatively the bias may be applied between source 23 and valve 26. In another embodiment, Fig. 4 (not shown), the needle valve producing the turbulent flow lies downstream of a pressure regulator referenced to the pressure of the fluid upstream thereof, the regulator providing a fixed pressure bias to the fluid upstream of the needle valve. 公开号:SU753366A3 申请号:SU752149422 申请日:1975-07-02 公开日:1980-07-30 发明作者:Вильям Барнес Каспер (Младший) 申请人:Дрессер Инвестментс Н.В. (Фирма); IPC主号:
专利说明:
The cross section with the movable element 4, the atomizer 5, located to the neck of the diffuser 3 and connected to the fuel line 6, equipped with a control valve 7, kinematically connected iri nomop1, and the block 8 with the iodine element 4, and the regulating device, which is formed by the capacitor 9 and a nozzle 10 connected to it by a valve 10 with a valve 11. A tank 9 is made of polypropylene in the form of a chamber with a float 12 having a 13 section and an air cavity 14, and the last of them is connected to the nozzle 10 and the fuel source (in the drawing there is no agenno). Claian 11 maintains the pressure in the chamber of the vessel 9, equal to PO-Ra, where PO is the atmospheric pressure, and Ra is the specified constant pressure. The valve I has a cavity 15 connected to the atmosphere by means of a pipe 16 and separated from the cavity 17 by means of a diaphragm 18, and a loading spring 19 and equipped with a locking member 20 having a seat in the partition 21. The spring 19 has a adjusting screw 22 for changing the tightening force, determined yun1, its given pressure is Pa. In the cavity 17, a pressure equal to PO-Pa is maintained, and the pressure is reduced by means of a pipe 23 connected to the flow path 24 of the inlet pipe 25 on which the device body 1 is mounted. The intake pipe 25 is connected to the cylinders of the internal combustion engine (not shown). Fuel-air mixture in the device was prepared as follows. When the engine is running, the air in the flow channel 2 of the device comes under atmospheric pressure and accelerates it in the diffuser 3 to a sonic speed. . In this case, the area of the passage through the throat section of the diffuser 3 is changed in accordance with the operating modes of the engine. In the expanding part of the diffuser 3, the kinetic energy of the air flow is converted into static pressure. Such a transformation ensures the flow of air to sound speed in the throat in all engine operating modes. The change of the irohoid cross section of the mouth of the iotok provides for the movement of the movable element 4 relative to the housing 1. The movable element 4 has a flat surface parallel to the flat surface of corus 1. The element 4 moves from the accelerator pedal (not shown). Since the air flow in the throat of the diffuser 3 has a sound velocity, the pressure in it is constantly equal to 0.53 Å of the atmospheric pressure PO. The opening of the movable element 4 with a flat surface provides for a change in the inlet aperture 7533 5 10 15 20 25 30 35 40 45 50 55 60 65 6 Zora 3 directly proportional to the neck area of the diffuser 3, therefore the air pressure at the nebulizer 5 is constant and predetermined with respect to atmospheric pressure, the change of which will affect the air pressure at the sprayer 5. The air pressure at the sprayer should be preferably 29/30 atmospheric pressure. When the throat area of the diffuser 3 changes, block 8 changes the orifice section of the regulating valve 7 proportionally to the change in the throat area of the diffuser 3. The air pressure downstream of the diffuser 3 is not affected by the valve 11, which depletes the pressure in the nozzle 10, equal to the decrease in the atmospheric pressure PO by the specified value Pa, thus, the pressure of air and fuel in the tank 9 is equal to PO-Pa. The fuel node at a pressure equal to RO-Pa, pz of tank 9 through fuel pipe 6 is supplied to regulating clian 7. The pressure value. Po-Pa must exceed the air pressure of the atomizer 5, and this excess exists in all engine operating modes and changes according to atmospheric change pressure. Since the pressure of the oil decreases by a constant value of Pa relative to the atmospheric pressure PO, reducing the latter will decrease the pressure drop across the control valve 7. As a result, the fuel consumption through it will be directly proportional to the decrease of the atmospheric pressure Pa (within the specified pressure drop range on the control valve 7). Due to the fact that the regulating valve 7 changes its flow area in proportion to the throat area of the diffuser 3, the flow of fuel into the air flow from the dispenser 5 changes in direct proportion to the air flow through the throat of the diffuser 3, i.e., in all engine operating modes. Thus, the constant composition of the mixture formed in the device, which is sent to the engine cylinders and regardless of the position of the movable element 4 of the diffuser 3 and the flow area of the control valve 7, is maintained. 2, a device for controlling the turbulent type claian and has a needle-mounted organ 26, which is kinematically connected with the moving element 4, and a baffle 28. placed in the fuel line 27. A baffle 29 is made in the fuel line 27, the cavity 30 of which is connected to the bore 31 pipe 33, connected with a fuel source that supports the pressure PO. In the bore 31, a valve body 34 is installed, which maintains the pressure PO-Pa and has a diaphragm 35 connected by means of the rod 36 with the locking body 34 and loaded with a spring 37. The diaphragm 35 separates the cavity 30 of the container 29 from the cavity 38 connected by a channel 39 to the nozzle 33. The spring 37 has an adjusting screw 40, by means of which a predetermined pressure PO-Pa is provided in the cavity 30 of the container 29. The device works as follows. When the engine is running, fuel from the fuel source is supplied at a constant pressure PO, and by means of a shut-off member 34 is maintained in the cavity 30 of the container 29, a constant pressure RO-Pa. The fuel from the tank 29 through the fuel line 27 under the pressure RO-RA is supplied to the partition 32 of the regulating the valve, at the outlet of which pressure is constantly generated, transmitted from the spray gun 5 regardless of the position of the needle sticking organ 26. Due to this, fuel consumption is maintained (in selected pressure ranges) proportional to the flow rate spirit in the mouth of the diffuser 3. Thus, the proposed method of obtaining a fuel-air mixture provides a constant composition of the mixture sent to the internal combustion engine, regardless of the mode of operation of the latter and the atmospheric pressure.
权利要求:
Claims (3) [1] 1. A method of producing a fuel-air mixture, which regulates the flow area of a variable cross-section diffuser and accelerates air flow to the sound velocity in the latter, feeds fuel from the source through the atomizer to the air flow to the diffu mouth 7 go 2 / depending on the position of the moving element of the diffuser by means of a regulating valve installed in front of the sprayer and on atmospheric pressure by means of a regulating device, characterized in that, to ensure a constant composition of the mixture, the pressure of the fuel in front of the control valve regulating device equals RO-Ra, where PO is atmospheric pressure, and Ra is a given constant pressure. [2] 2. A device for implementing the method according to claim 1, comprising a housing with a flow-through a channel and a diffuser of variable cross section, having a moving element, a sprayer located up to the diffuser throat, a fuel source connecting the latter with a fuel line dispenser, equipped with a control valve, kinematically connected with the movable element of the diffuser, and a control device connected between the source and the valve, characterized in that the control device is designed as a container connected to the fuel line and associated with it, supporting a pressure equal to RO-Ra, where RO is atmospheric pressure, and Ra is the specified pressure. [3] 3. The device according to claim 2, characterized in that the container is made in the form of a float chamber with a fuel and air cavities, the latter of which is connected to an air source through a valve that maintains a pressure equal to PO - Pa Information sources, taken into account in the examination 1. French Patent No. 1490527, cl. F 02M, publ. 1967. tput.f 3S // / 33 3 / Z8
类似技术:
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同族专利:
公开号 | 公开日 US3987132A|1976-10-19| IT1040769B|1979-12-20| DE2529751A1|1976-01-22| GB1513454A|1978-06-07| JPS5124935A|1976-02-28| BE830353A|1975-10-16| US4100927A|1978-07-18| FR2277240B1|1977-07-08| CA1054023A|1979-05-08| JPS5744889B2|1982-09-24| FR2277240A1|1976-01-30| DE2529751B2|1979-06-13| DE2529751C3|1980-02-21|
引用文献:
公开号 | 申请日 | 公开日 | 申请人 | 专利标题 US1399530A|1921-12-06|stewart | US1010184A|1911-01-19|1911-11-28|Carl F Schulz|Carbureter.| US1241546A|1916-01-19|1917-10-02|Arthur L Payton|Carbureter.| US1814118A|1926-10-14|1931-07-14|Curtis B Camp|Carburetor fuel supply system| US2250932A|1939-03-03|1941-07-29|George M Holley|Fuel control| US2340954A|1942-05-04|1944-02-08|Phillips Petroleum Co|Apparatus for testing aircraft engines| US2367499A|1943-01-29|1945-01-16|George M Holley|Load and altitude control| US2487520A|1944-12-26|1949-11-08|Vickers Inc|Hydraulic power transmission with bypass flow control valve| US2672329A|1949-07-13|1954-03-16|Zarnack Werner|Carburetor of combustion engines with automatic fuel regulation| US3449923A|1968-03-08|1969-06-17|Refrigerating Specialties Co|Refrigerant feed control and systems| GB1289336A|1968-10-22|1972-09-13| US3602252A|1969-08-18|1971-08-31|Eaton Yale & Towne|Constant flow heater valve| US3598138A|1970-03-06|1971-08-10|Benjamin H Hadley|Pressure controller| FR2084292A5|1970-03-06|1971-12-17|Dresser Ind| GB1355249A|1971-06-10|1974-06-05|Ford Motor Co|Spark ignition internal combustion engine| US3791412A|1972-06-05|1974-02-12|H Mays|Reducing valve for high pressure fluids and connecting means therefor|JPS595378U|1982-07-02|1984-01-13| US4870273A|1987-08-07|1989-09-26|Xerox Corporation|Jitter reduction in rotating polygon scanning systems| FR2667408B1|1990-09-27|1992-12-31|Emerit Michel|METHOD AND DEVICE FOR AUTOMATIC REGULATION OF FLUID FLOW IN A FLUID DISTRIBUTION NETWORK AS A FUNCTION OF PRESSURE VARIATIONS.| US6223645B1|1999-05-28|2001-05-01|Autoquip, Inc.|Compressed air flow rate controller for paint sprayer system| US6874404B1|1999-05-28|2005-04-05|Autoquip, Inc.|Compressed air flow rate controller|
法律状态:
优先权:
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申请号 | 申请日 | 专利标题 US05/485,517|US3987132A|1974-07-03|1974-07-03|Fluid flow regulation| 相关专利
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