公开(公告)号：US06595500B2

公开(公告)日：2003-07-22

申请号：US10127496

申请日：2002-04-23

Applicant: Gerhard Osburg ,  Wolfgang Luithardt ,  Peter Schmidt ,  Reinhard Gerhardy

Inventor： Gerhard Osburg ,  Wolfgang Luithardt ,  Peter Schmidt ,  Reinhard Gerhardy

IPC: F02M708

CPC classification number: F02M7/08 ,  F02B63/02 ,  F02M17/04 ,  F02M37/16 ,  F02M37/20 ,  Y10S261/08 ,  Y10S261/68

Abstract: A membrane carburetor for an internal combustion engine in a portable handheld work apparatus includes a control chamber (3) delimited by a membrane (2). The control chamber (3) is connected via a feed line (4) to a fuel tank (5). The feed line (4) is cleared via a valve body (6) when there is a deflection of the membrane (2) because of an underpressure in the control chamber (3). The control chamber (3) is connected to an air channel (10) via at least one fuel nozzle (7) and at least one ancillary chamber (9). The air channel (10) passes through the membrane carburetor (1) and leads to the internal combustion engine. A purge pump (11) is provided in a fuel line (12) connecting the control chamber (3) to the fuel tank (5). The fuel path between the control chamber (3) and the purge pump (11) is guided through at least one ancillary chamber (9).

Abstract translation: 用于便携式手持式工作装置中的内燃机的膜式化油器包括由膜（2）限定的控制室（3）。 控制室（3）经由进料管线（4）连接到燃料箱（5）。 当由于控制室（3）中的负压而存在膜（2）的偏转时，馈送线（4）通过阀体（6）而被清除。 控制室（3）经由至少一个燃料喷嘴（7）和至少一个辅助室（9）连接到空气通道（10）。 空气通道（10）穿过膜化油器（1）并通向内燃机。 在将控制室（3）连接到燃料箱（5）的燃料管路（12）中设置有净化泵（11）。 控制室（3）和净化泵（11）之间的燃料路径被引导通过至少一个辅助室（9）。

公开(公告)号：US20020176789A1

公开(公告)日：2002-11-28

申请号：US10140051

申请日：2002-05-07

Applicant: Walbro Japan, Inc.

Inventor： Noriyu Nagata

IPC: F04B039/10 ,  F04B035/04

CPC classification number: F04B53/1057 ,  F02M7/08 ,  F04B53/1047 ,  F04B53/109 ,  Y10T137/2544 ,  Y10T137/7843

Abstract: An acceleration fuel pump for use with a combustion engine carburetor is an integral part of the carburetor body and provides an additional flow of fuel to the fuel-and-air mixing passage of the carburetor during acceleration of the engine. The acceleration fuel pump has a plunger which inserts sealably into a cylindrical cavity carried by the body of the carburetor. During acceleration of the engine, the plunger inserts further into the cavity against the resilient force of a spring and toward a resilient check valve member causing the member to deform into a fuel feed state. A fuel passage which extends between the bottom of a fuel chamber of the carburetor and the fuel-and-air mixing passage of the carburetor is intersected by the cavity and the resilient check valve member. The member has a slit at a leading portion of the member which opens when in the fuel feed state and fuel is pushed by the plunger out of a fuel reservoir carried by the cavity and into an outlet leg of the fuel feed passage which supplies fuel to the fuel-and air-mixing passage. During insertion of the plunger, pressure within the fuel reservoir overcomes the pressure within the fuel chamber causing a trailing segment of the member to expand radially outward and engage the internal cylindrical wall of the cavity preventing any reverse flow from the fuel reservoir and into an inlet leg of the fuel passage which extends from the cavity to the fuel chamber. When the engine is through acceleration, the plunger insertion stops and the internal spring forces the plunger retract in an outward direction from the cavity. This retraction causes a pressure reduction within the fuel reservoir causing the slit of the leading segment of the check valve member to close and the peripheral rim of the trailing segment to separate or space from the cylindrical wall of the cavity. Fuel is then drawn from the fuel chamber through the inlet leg of the fuel passage into the fuel reservoir in preparation for the next acceleration of the combustion engine.

公开(公告)号：US5843345A

公开(公告)日：1998-12-01

申请号：US818585

申请日：1997-03-14

Applicant: Thomas G. Guntly

Inventor： Thomas G. Guntly

IPC: F02M7/08 ,  F02M7/093 ,  F02M7/133

CPC classification number: F02M7/08 ,  F02M7/093 ,  F02M7/133

Abstract: An accelerator having a main body defining a main chamber, a movable member (e.g., a diaphragm) positioned within and dividing the main chamber into a pneumatic chamber and a fuel chamber, and a damping orifice (e.g., in the main body) interconnecting the pneumatic chamber with a gas source (e.g., ambient air). The damping orifice has a cross sectional area less than about 0.002 square inches. To inhibit contamination of the accelerator, a filter can be operatively positioned between the pneumatic chamber and the ambient air.

Abstract translation: 具有限定主室的主体的加速器，位于主室内并分隔成气动室和燃料室的可动构件（例如，隔膜）以及将主室内的阻尼孔（例如主体） 具有气源（例如环境空气）的气动室。 阻尼孔的横截面积小于约0.002平方英寸。 为了抑制加速器的污染，过滤器可以可操作地定位在气动室和环境空气之间。

公开(公告)号：US5035222A

公开(公告)日：1991-07-30

申请号：US444770

申请日：1989-12-01

Applicant: Martin Feldinger

Inventor： Martin Feldinger

IPC: F02M69/00 ,  F02D3/00 ,  F02M7/08 ,  F02M7/22 ,  F02M9/133 ,  F02M69/52

CPC classification number: F02M7/08 ,  F02M7/22 ,  F02M9/133 ,  Y10S261/56

Abstract: A system with which a correction of the fuel composition upon a change in the state of load of an internal combustion engine with which a mixture-forming device (4, 6, 8, 9, 11) is associated is constructed in structurally simple manner. The mixture-forming device has a feed unit (6) for the fuel with an inlet-side fuel conveyor line (5) and a discharge-side fuel conveyor line (7) and a movably mounted feed member (18). Depending on the position of the feed member (18), the feed member (18) provides variable fuel passage cross-sections in the feed unit (6). The feed unit is connected via an opening (31) which is closed in sealing fashion by a movable equalization element (33), the equalization space (32) being connected via a branch line (34) to the discharge-side fuel conveyor line. The feed member and the equalization element are coupled with each other locked for movement in such a manner that a movement of the feed member in the direction of an enlarged fuel passage cross-section leads to a movement of the equalization element which reduces the equalization space. A movement of the feed member in the direction of a reduced fuel passage cross-section leads to a movement of the equalization element which enlarges the equalization space.

Abstract translation: 在混合物形成装置（4,6,8,9,11）与内燃机的负载状态发生变化的情况下对燃料组成进行校正的系统以结构简单的方式构成。 混合物形成装置具有用于燃料的进料单元（6），其具有入口侧燃料输送管线（5）和排出侧燃料输送管线（7）和可移动安装的进料部件（18）。 进料构件（18）根据进料构件（18）的位置，在进料单元（6）中提供可变燃料通道横截面。 馈送单元经由可移动均衡元件（33）以密封方式封闭的开口（31）连接，均衡空间（32）经由分支管线（34）连接到排放侧燃料输送线。 馈送构件和均衡元件彼此联接以被锁定以便运动，使得进给构件沿着扩大的燃料通道横截面的方向的移动导致均衡元件的移动，这降低了均衡空间 。 进给构件在减小的燃料通道横截面的方向上的移动导致均衡元件的移动，这扩大了均衡空间。

公开(公告)号：US4957664A

公开(公告)日：1990-09-18

申请号：US679605

申请日：1984-12-07

Applicant: Yoshihiro Kohno ,  Kazumi Iida

Inventor： Yoshihiro Kohno ,  Kazumi Iida

IPC: F02M7/06 ,  F02M7/08

CPC classification number: F02M7/06 ,  F02M7/08

Abstract: Several embodiments of accelerating fuel systems and methods for delivering accelerating fuel to an internal combustion engine over an extended time period. In each embodiment, the accelerating pump delivers a portion of its discharge fuel to a storage chamber and the storage chamber redelivers the fuel to the engine after the completion of the pumping stroke of the accelerating pump. In some embodiments of the invention, the stored fuel is returned to the engine by gravity. In some embodiments, the stored fuel is delivered to the engine at a different rate than the rate at which it is stored. In some embodiments, the return rate is dependent upon the change of speed of the engine and in other embodiments, the return rate is responsive to the acceleration of the vehicle powered to the engine.

Abstract translation: 加速燃料系统的几个实施例和用于在延长的时间段内将加速燃料输送到内燃机的方法。 在每个实施例中，加速泵将其排放燃料的一部分输送到储存室，并且在加速泵的泵送冲程完成之后，储存室将燃料重新引导到发动机。 在本发明的一些实施例中，储存的燃料通过重力返回到发动机。 在一些实施例中，储存的燃料以与其储存的速率不同的速率被输送到发动机。 在一些实施例中，返回速率取决于发动机的速度变化，并且在其他实施例中，返回速率响应于被供给发动机的车辆的加速度。

公开(公告)号：US4917053A

公开(公告)日：1990-04-17

申请号：US345614

申请日：1989-04-27

Applicant: Masaki Okazaki ,  Junichi Hasegawa ,  Hiroaki Fujimoto

Inventor： Masaki Okazaki ,  Junichi Hasegawa ,  Hiroaki Fujimoto

IPC: F02M69/10 ,  F02B61/04 ,  F02B75/02 ,  F02M7/08 ,  F02M35/10 ,  F02M69/00 ,  F02M71/00 ,  F02N19/00

CPC classification number: F02M35/10308 ,  F02M35/10085 ,  F02M35/10183 ,  F02M35/1019 ,  F02M35/10196 ,  F02M35/10275 ,  F02M35/10354 ,  F02M7/08 ,  F02B2075/025 ,  F02B61/045 ,  F02M35/167

Abstract: Several embodiments of enrichment system for internal combustion engines for supplying enrichment fuel in response to a predetermined condition. In each embodiment, the engine has multiple chambers with multiple intake passages and a balance passage that interconnects at least some of the intake passages. The supplemental fuel is delivered to the balance passage for distribution to the chambers served by the interconnected intake passages. In some embodiments, the engine is provided with a charge forming system in the form of carburetors and in other embodiments, the engine is provided with a charge forming system in the form of fuel injection.

Abstract translation: 用于响应于预定条件供应浓​​缩燃料的内燃机的富集系统的几个实施例。 在每个实施例中，发动机具有多个具有多个进气通道的腔室以及与至少一些进气通道相互连接的平衡通道。 补充燃料被输送到平衡通道以分配到由相互连接的进气通道所服务的室。 在一些实施例中，发动机设置有化油器形式的电荷形成系统，并且在其它实施例中，发动机设置有燃料喷射形式的电荷形成系统。

公开(公告)号：US4440697A

公开(公告)日：1984-04-03

申请号：US460766

申请日：1983-01-25

Applicant: Yoshihiro Sakurai

Inventor： Yoshihiro Sakurai

IPC: F02M7/08

CPC classification number: F02M7/08

Abstract: A multi-fuel carburetor embodying a number of improved accelerating pump features. In accordance with one of these features, the accelerating pump discharge is located upstream of the venturi section and is directed in such a way that the depositing of fuel on the throttle valve is minimized and improved distribution to the associated manifold is achieved. In accordance with another feature, the accelerating pump is operated by a linkage which causes the accelerating to begin its discharge stroke before the throttle valve is opened. As another feature, the output of the accelerating pump may be conveniently varied by using a variable bypass in the accelerating pump discharge circuit. As yet another feature, the back or non-pumping side of the accelerating pump is vented to a fuel bowl so as to minimize leakage and to insure return of any fuel that leak passed the accelerating pump to the fuel bowl.

Abstract translation: 一种多燃料化油器，体现了许多改进的加速泵特性。 根据这些特征中的一个，加速泵排放位于文丘里管部分的上游并且被引导成使得节流阀上的燃料沉积最小化并且实现了对相关歧管的改进的分配。 根据另一特征，加速泵通过连杆操作，该联动装置在节流阀打开之前使加速开始排放冲程。 作为另一个特征，可以通过在加速泵排出回路中使用可变旁路来方便地改变加速泵的输出。 作为另一个特征，加速泵的后部或非泵送侧被排放到燃料碗中，以便使泄漏最小化并且确保将通过加速泵的泄漏的任何燃料返回到燃料碗。

公开(公告)号：US4362673A

公开(公告)日：1982-12-07

申请号：US286700

申请日：1981-07-24

Applicant: Walter Schauer

Inventor： Walter Schauer

IPC: F02M7/08

CPC classification number: F02M7/08

Abstract: A carburetor comprising an accelerator pump having a working chamber containing fuel and a piston displaceable in the working chamber to discharge fuel therefrom to an inlet passage of the carburetor. A sleeve is secured to the carburetor housing at one end of the working chamber and the piston is slidably guided by the sleeve for movement into and out of the chamber. A sealing ring adjoins the sleeve and includes a free sealing lip directed into the chamber and sealingly bearing against the piston. In order to vary the amount of fuel delivered to the inlet passage for a given stroke of the piston, a piston and sleeve of different diameter are employed while the linkage mechanism between the throttle valve and the piston can remain without change.

Abstract translation: 一种化油器，包括具有包含燃料的工作室的加速器泵和可在工作室中移动的活塞，以将燃料从其中排出到化油器的入口通道。 套筒在工作室的一端固定在化油器壳体上，活塞由套筒可滑动地引导以移动和移出腔室。 密封圈与套筒相邻并且包括引导到腔室中的自由密封唇缘并且密封地抵靠活塞。 为了改变在活塞的给定行程下输送到入口通道的燃料量，使用不同直径的活塞和套筒，而节流阀和活塞之间的连杆机构可以保持不变。

公开(公告)号：US4285887A

公开(公告)日：1981-08-25

申请号：US113041

申请日：1980-01-17

Applicant: Kiyoshi Akiya

Inventor： Kiyoshi Akiya

IPC: F02M3/12 ,  F02M7/08

CPC classification number: F02M7/08 ,  F02M3/12 ,  Y10S261/39

Abstract: A carburetor herein disclosed includes a low speed spray aperture defined on the side wall of an intake duct at a position opposed to a throttle valve inside the intake duct and feeding a fuel for low speed operation in accordance with the degree of opening of the throttle valve, and a by-pass passage having, on the side wall portion of the intake duct, an intake port and a controlling stream spray port whereby the former is defined on the upstream side of the throttle valve and the latter, on the downstream side of the throttle valve. The by-pass passage incorporates therein a controlling nozzle which sprays a jet stream towards the controlling steam spray port. In accordance with an embodiment of the invention, an acceleration nozzle is additionally disposed in the by-pass passage, the nozzle opening into the by-pass passage on the upstream side of the controlling nozzle and spraying an acceleration fuel into the by-pass passage. In accordance with another embodiment of the invention, the intake duct is connected with an intake manifold having branch conduits leading to respective combustion chambers of a plurality of cylinders of an engine. The bypass passage has a plurality of controlling stream spray ports, each of which opens into each of the branch conduits.

Abstract translation: 本文公开的化油器包括限定在进气管道的侧壁上的低速喷射孔，其在与进气管道内的节流阀相对的位置处，并且根据节气门的开度供给用于低速运转的燃料 以及在进气管的侧壁部分具有进气口和控制流​​喷射口的旁路通道，由此在节流阀的上游侧和下游侧限定了前者，在下游侧 节流阀。 旁路通道内装有一个控制喷嘴，该喷嘴将喷射流喷射到控制蒸汽喷雾口。 根据本发明的实施例，加速喷嘴另外设置在旁通通道中，喷嘴开口进入控制喷嘴上游侧的旁通通道，并将加速燃料喷射到旁路通道 。 根据本发明的另一个实施例，进气管与具有分支管道的进气歧管连接，导管通向发动机的多个气缸的相应的燃烧室。 旁路通道具有多个控制流喷射口，每个控制流喷射口通向每个分支管道。

公开(公告)号：US4130609A

公开(公告)日：1978-12-19

申请号：US863883

申请日：1977-12-23

Applicant: Timothy Fiedler

Inventor： Timothy Fiedler

IPC: F02M7/08

CPC classification number: F02M7/08

Abstract: An accelerator pump for providing additional fuel to the carburetor of an internal combustion engine during acceleration permits staged or sequential operation of the pump while employing simplified construction. The structure is arranged so that the accelerating pump is caused to travel during an initial opening of a primary throttle of the carburetor, after which the pump ceases to move until a secondary throttle begins to open, at which time additional pumping action is accomplished.

Abstract translation: 用于在加速期间向内燃机的化油器提供附加燃料的加速器泵允许在采用简化结构的情况下泵的分级或顺序操作。 结构被布置成使得加速泵在化油器的主节气门的初始打开期间被运动，之后泵停止移动直到二次节气门开始打开，此时实现额外的泵送动作。