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公开(公告)号：US5133905A
公开(公告)日：1992-07-28
申请号：US594021
申请日：1990-10-09
Applicant: John C. Woody , Mark S. Swanson
Inventor： John C. Woody , Mark S. Swanson
CPC classification number: F02M17/04 , F02M7/11 , Y10S261/67 , Y10S261/68
Abstract: Method, system and apparatus for metering fuel to an internal combustion engine via a carburetor having a mixture conduit with a venturi therein. A main fuel nozzle supplies fuel to the venturi of the carburetor in response to the static pressure drop induced across an associated main fuel flow controlling restriction by the engine intake induced air flow through the carburetor mixture conduit. A pitot tube is disposed in the venturi with an opening facing upstream in a zone of maximum air flow through the carburetor venturi. A vent passageway system connects the pitot tube to a single closed air chamber cooperable with either a diaphragm or a float to regulate operation of an inlet valve controlling flow of fuel to a main fuel controlling restriction. The adverse effect of engine intake induced tuning pressure wave forms in the mixture conduit of the carburetor transitting the venturi is eliminated, reduced or modulated by the dynamic pressure exerted by said tuning waves at the pitot tube and transmitted by the vent passageway to said chamber and to said main fuel restriction.
Abstract translation: 通过具有其中具有文丘里管的混合管道的化油器将燃料计量到内燃机的方法，系统和装置。 主燃料喷嘴响应于由发动机进气引起的通过化油器混合管道的气流引起的相关联的主燃料流控制限制引起的静压力下降，向化油器的文氏管提供燃料。 皮托管设置在文丘里管中，在通过化油器文丘里管的最大气流区域中面向上游的开口。 排气通道系统将皮托管连接到与隔膜或浮子配合的单个封闭空气室，以调节控制燃料流向主燃料控制限制的入口阀的操作。 通过在皮托管施加的所述调谐波施加的动态压力来消除，减少或调节在经过文丘里管的化油器的混合管道中的发动机进气引起的调谐压力波形的不利影响，并且通过排气通道传送到所述室， 说燃油主要限制。
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公开(公告)号：US5055238A
公开(公告)日：1991-10-08
申请号：US539795
申请日：1990-06-18
Applicant: Satoru Araki
Inventor： Satoru Araki
CPC classification number: F02M3/09 , F02M17/04 , F02M19/04 , Y10S261/38 , Y10S261/68
Abstract: There is disclosed herein an arrangement for limiting the rotation of adjustment valves which control main and idle fuel paths in a diaphragm carburetor. The valves are disposed relatively close together and have caps that are configured to act as stoppers for each other so as to limit the maximum rotation of each valve.
Abstract translation: 这里公开了一种用于限制调节阀的旋转的装置，其控制隔膜式化油器中的主要和空闲的燃料路径。 阀设置得相对靠近在一起并且具有被配置为彼此作为塞子的盖，以限制每个阀的最大旋转。
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公开(公告)号：US4934601A
公开(公告)日：1990-06-19
申请号：US256909
申请日：1988-10-12
Applicant: Robert E. Stevens , Dennis A. Roundebush
Inventor： Robert E. Stevens , Dennis A. Roundebush
CPC classification number: F23C15/00 , A01M13/00 , B01F3/04446 , B05B12/06 , F02M1/02 , F02M1/16 , Y10S261/08 , Y10S261/68
Abstract: In one embodiment of the present invention, a pulse fog generator powered by a resonant intermittent combustion device having a carburetor and a combustion antechamber, includes a starting air supply system for directing a flow of starting air into the antechamber, comprising an inlet/outlet ball check valve mounted over the discharge opening piston chamber within which a piston head is reciprocated by a connecting rod eccentrically mounted to an electric motor. A priming pump is mounted on the carburetor, and comprises a priming fuel chamber hydraulically communicating with the carburetor and a piston reciprocatable within the priming fuel chamber to draw fuel from a fuel tank into the priming fuel chamber and to discharge the fuel from the priming fuel chamber into the carburetor. In lieu of the reciprocatable piston, a resilient priming bulb and valve assembly can supply the priming fuel to the throat passage of the carburetor in another embodiment. An on-off control for the combustion device includes a shut-off plate, disposed over the air inlet of the carburetor, affixed to a slidably mounted plunger so that the shut-off plate can be moved between a position covering and a position displaced from the air inlet. The pulse fog generator has a pressure responsive formulation control apparatus inserted between a formulation tank and means for injecting formulation into the exhaust tube of the combustion device.
Abstract translation: 在本发明的一个实施例中，由具有化油器和燃烧前厅的共振间歇燃烧装置供电的脉冲雾发生器包括用于将起始空气流引导到前室的起始空气供应系统，包括入口/出口球 安装在排放开口活塞室上的止回阀，其中活塞头通过偏心地安装到电动机的连杆往复运动。 起动泵安装在化油器上，并且包括与化油器液压连通的起动燃料室和在启动燃料室内可往复运动的活塞，以将燃料从燃料箱吸入到起动燃料室中并从燃料燃料排出燃料 进入化油器。 作为可往复运动的活塞，代替可往复运动的活塞，在另一个实施例中，弹性起动灯泡和阀组件可以将起动燃料供应到化油器的喉部通道。 用于燃烧装置的开关控制包括设置在化油器的空气入口上的切断板，固定在可滑动地安装的柱塞上，使得切断板可以在位置覆盖和位移之间移动 进气口。 脉冲雾发生器具有压力响应配方控制装置，其插入在配制罐和用于将配制物喷射到燃烧装置的排气管中的装置之间。
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公开(公告)号：US4915063A
公开(公告)日：1990-04-10
申请号：US355031
申请日：1989-05-16
Applicant: Marvin D. Stumpf
Inventor： Marvin D. Stumpf
CPC classification number: F02M17/04 , F01P1/06 , F02M37/20 , F02B2075/025 , F02D2200/0606 , Y10S261/68
Abstract: An apparatus for reducing or eliminating the occurrence of vapor lock in two-cycle engines isolates the fuel pump from the heat radiating engine block in a two-cycle, air cooled engine spaces the fuel pump from the carburetor and injects the fuel directly against the carburetor inlet valve. Application of an additional cooling means including airflow and liquid fuel means, may be provided in order to convey heat away from the fuel pump and therefore maintain the fuel pump temperature below the point at which vaporation pressure exceeds the impulse pressure generated from the power head. The fuel pump is removed from the hot carburetor as part of the vapor lock prevention system.
Abstract translation: 用于减少或消除在两冲程发动机中发生蒸气锁的装置将燃料泵与散热发动机缸体隔离在两循环的空气冷却发动机中，使得燃料泵从化油器处空出并将燃料直接喷射在化油器上 入口阀。 可以提供包括气流和液体燃料装置的额外的冷却装置的应用，以便将热量从燃料泵传送出去，从而将燃料泵温度保持在低于蒸发压力超过从动力头产生的脉冲压力的点。 燃料泵作为防汽油锁系统的一部分从热化油器中取出。
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公开(公告)号：US4877560A
公开(公告)日：1989-10-31
申请号：US181567
申请日：1988-04-14
Applicant: Brian P. Kenny , Roger A. Bowles
Inventor： Brian P. Kenny , Roger A. Bowles
CPC classification number: F02M1/046 , F02M17/04 , F02M19/04 , Y10S261/08 , Y10S261/68
Abstract: A carburetor comprising a main body portion defining a carburetor mixing passage having an air intake side and an engine outlet side, a fuel pump, a throttle shutter mounted within the carburetor mixing passage between the air intake side and the engine outlet side. The carburetor has a metering chamber for supplying fuel from the fuel pump into the carburetor mixing passage via a main discharge port, the main discharge port opens into the carburetor mixing passage on the air intake side of the throttle shutter. A starting fuel supply passage extends from the pressure side of the fuel pump to the carburetor mixing passage. A means is provided for selectively opening and closing the starting fuel supply passage such that when the throttle is in a partially opened position and the starting fuel supply passage is open, the fuel pump causes fuel to be injected through the starting fuel supply passage into the carburetor mixing passage.
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Patent Agency Ranking
公开(公告)号：US4793951A
公开(公告)日：1988-12-27
申请号：US53327
申请日：1987-05-22
Applicant: William A. Scott
Inventor： William A. Scott
CPC classification number: F02M1/16 , F02M17/04 , Y10S261/08 , Y10S261/68
Abstract: A fuel primer for small internal combustion engines is disclosed. The fuel primer is associated with a metering chamber of a carburetor. The metering chamber includes an inlet port and an outlet port and communicates with both a fuel source and a venturi on the carburetor by conventional means. The primer includes a mechanism which communicates with the restricted inlet port to provide one way flow into the metering chamber. A second mechanism communicates with the unrestricted outlet port to provide one way flow from the metering chamber. A third mechanism associates the first and second one way mechanisms for pressurizing and depressurizing the flow through the primer so that fuel is drawn into the metering chamber from the fuel source.
Abstract translation: 公开了一种用于小型内燃机的燃料底漆。 燃料底漆与化油器的计量室相关联。 计量室包括入口和出口，并且通过常规方式与化油器上的燃料源和文丘里管连通。 底漆包括与限制入口连通以提供单向流入计量室的机构。 第二机构与不受限制的出口连通以提供来自计量室的单向流。 第三机构使第一和第二单向机构相关联，以对通过底漆的流动进行加压和减压，使得燃料从燃料源被吸入计量室。
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67.发明授权Carburetor arrangement for changing the ratio of the air/fuel mixture in handheld motor-driven apparatus 失效化油器装置用于改变手持式电动机械中空气/燃料混合物的比例
公开(公告)号：US4787356A
公开(公告)日：1988-11-29
申请号：US67591
申请日：1987-06-26
Applicant: Stephan Rosgen , Michael Langer
Inventor： Stephan Rosgen , Michael Langer
CPC classification number: F02M17/04 , Y10S261/68
Abstract: A carburetor arrangement changes the ratio of air and fuel in the air/fuel mixture for an internal combustion engine of a handheld motor-driven apparatus such as a chain saw, hedge trimmer or the like. The carburetor arrangement includes a membrane carburetor with a regulating membrane by means of which a valve needle is lifted from a valve seat against the force of a spring. The valve needle and valve seat conjointly define a valve for admitting fuel into a chamber of the carburetor. A positioning member is mounted with respect to the regulating membrane and is actuable in dependence upon the rotational speed of the engine. The actuation occurs such that the valve needle is additionally displaced a further incremental amount in response to a predetermined rotational speed of the engine thereby enriching the air/fuel mixture by an additional amount.
Abstract translation: 化油器装置改变了诸如链锯，树篱修剪器等的手持式电动驱动装置的内燃机的空气/燃料混合物中的空气和燃料的比例。 化油器装置包括具有调节膜的膜化油器，通过该隔膜化油器，阀针克服弹簧的力从阀座提升。 阀针和阀座联合地限定用于将燃料引入化油器的腔室中的阀。 定位构件相对于调节膜安装并且可根据发动机的转速而致动。 致动发生，使得阀针响应于发动机的预定旋转速度额外地移动另外的增量，从而使空气/燃料混合物富集额外的量。
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公开(公告)号：US4769185A
公开(公告)日：1988-09-06
申请号：US84894
申请日：1987-08-13
Applicant: Kohji Nagasaka , Yoshimi Sejimo
Inventor： Kohji Nagasaka , Yoshimi Sejimo
CPC classification number: F02M17/04 , F02M5/10 , Y10S261/68 , Y10S261/81
Abstract: A diaphragm carburetor with a fuel metering chamber designed for easy restart when hot which includes a separate escape chamber connected to the metering chamber having a second diaphragm controlled exhaust valve. The second diaphragm is subject to positive crankcase pressure during engine operation to maintain the exhaust valve closed. When the engine is stopped, the exhaust valve is opened by a spring and fuel in the metering chamber will move into the escape chamber and out of the carburetor rather than be forced into the fuel mixing passage and venturi of the carburetor.
Abstract translation: 具有燃料计量室的隔膜式化油器，其设计用于在热时易于重新启动，其包括连接到具有第二隔膜控制排气阀的计量室的单独的逸出室。 在发动机运转期间，第二个隔膜承受曲轴箱的正压力，以保持排气阀的关闭。 当发动机停止时，排气门由弹簧打开，计量室中的燃料将移动到逃逸室中并离开化油器，而不是被迫进入化油器的燃料混合通道和文丘里管。
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公开(公告)号：US4759883A
公开(公告)日：1988-07-26
申请号：US24987
申请日：1987-03-12
Applicant: John C. Woody , Mark S. Swanson
Inventor： John C. Woody , Mark S. Swanson
CPC classification number: G05D7/0186 , F02M1/10 , F02M17/04 , F02M7/18 , Y10S261/38 , Y10S261/68 , Y10S261/84
Abstract: A temperature compensated carburetor having a fuel metering system including a variable restriction needle gate valve for varying the effective flow cross-sectional area of the main and/or idle fuel supply duct to modulate the flow rate of fuel to the carburetor venturi mixing passage. The needle gate valve is made of plastic material having a much greater coefficient of expansion than the aluminum carburetor body in which it is adjustably mounted such that differential linear expansion and contraction of the needle valve relative to the carburetor body in response to ambient temperature changes varies the flow-controlling cross-sectional area of the fuel duct inversely relative to ambient temperature changes. The needle valve is a rod-like body with a threaded cylindrical mounting portion at one end threadably secured in a threaded bore in the carburetor body. A reduced diameter extension of the needle body extends axially away from the mounting end of the needle body and has cylindrical stem portion slidable in another bore of the carburetor body. The needle body is unrestrained linearly from the free end of the stem portion to the needle body mounting portion. The free end of the stem is movable in a jet fuel feeding passageway of the fuel duct to thus vary the flow controlling cross-section thereof.
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公开(公告)号：US4684485A
公开(公告)日：1987-08-04
申请号：US900435
申请日：1986-08-26
Applicant: William A. Scott
Inventor： William A. Scott
CPC classification number: F02M1/16 , F02M17/04 , Y10S261/08 , Y10S261/68
Abstract: A fuel primer for small internal combustion engines is disclosed. The fuel primer is associated with a metering chamber of a carburetor. The metering chamber includes an inlet port and an outlet port and communicates with both a fuel source and a venturi on the carburetor by conventional means. The primer includes a mechanism which communicates with the restricted inlet port to provide one way flow into the metering chamber. A second mechanism communicates with the unrestricted outlet port to provide one way flow from the metering chamber. A third mechanism associates the first and second one way mechanisms for pressurizing and depressurizing the flow through the primer so that fuel is drawn into the metering chamber from the fuel source.
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