公开(公告)号：US06401673B2

公开(公告)日：2002-06-11

申请号：US09795392

申请日：2001-03-01

Applicant: Peter Linsbauer ,  Lars Bergmann ,  Heiko Rosskamp ,  Reinhard Gerhardy

Inventor： Peter Linsbauer ,  Lars Bergmann ,  Heiko Rosskamp ,  Reinhard Gerhardy

IPC: F02B2520

CPC classification number: F02B63/02 ,  F02B25/20 ,  F02B2075/025

Abstract: The invention relates to a two-stroke engine for a portable handheld work apparatus such as a motor chain saw. The combustion chamber (3), which is configured in a cylinder (2), is delimited by a piston (5) which drives a crankshaft (7) rotatably journalled in a crankcase (4). The crankcase (4) is connected to the combustion chamber (3) via a transfer channel (14). A first end (20) of the transfer channel (14) opens into the combustion chamber (3) via an entry window (12, 15) lying in the cylinder wall (16); whereas, the second end (19) of this transfer channel (14) is open toward the crankcase (4). The transfer channel (14) is connected between its ends (19, 20) to an air channel (22a, 22b) via a check valve (21). The air channel (22a, 22b) supplies essentially fuel-free gas via a throttle (31) having an adjustable throttle element (33). A mixture-preparation device (8) is provided for the air/fuel mixture downstream of an air filter (42) in the flow direction of the combustion air. The air/fuel mixture is supplied via an inlet (11) to the crankcase (4). In order to meter clean air to the air channels in a controlled manner, an adjustable throttle element (33) is mounted in a throttle channel (36) of an independent throttle housing (31) and the throttle channel (36) is connected upstream of the throttle element to the clean space (51) of the air filter (42) connected ahead of the mixture-preparation device (8).

Abstract translation: 本发明涉及一种用于诸如电动链锯的便携式手持式工作装置的二冲程发动机。 构造在气缸（2）中的燃烧室（3）由驱动曲轴（7）的活塞（5）限定，所述曲轴（7）可旋转地轴颈安装在曲轴箱（4）中。 曲轴箱（4）通过传送通道（14）连接到燃烧室（3）。 传送通道（14）的第一端（20）经由位于气缸壁（16）中的进入窗（12,15）进入燃烧室（3）。 而传送通道（14）的第二端（19）朝向曲轴箱（4）打开。 传送通道（14）通过止回阀（21）连接到其端部（19,20）与空气通道（22a，22b）之间。 空气通道（22a，22b）经由具有可调节节流元件（33）的节气门（31）供给基本上无燃料的气体。 在燃烧空气的流动方向上为空气过滤器（42）下游的空气/燃料混合物提供混合物制备装置（8）。 空气/燃料混合物通过入口（11）供应到曲轴箱（4）。 为了以可控的方式将清洁空气计量到空气通道，可调整节流元件（33）安装在独立节气门壳体（31）的节流通道（36）中，并且节气门通道（36）连接到 节流元件连接到混合物制备装置（8）前面的空气过滤器（42）的清洁空间（51）。

公开(公告)号：US06328288B1

公开(公告)日：2001-12-11

申请号：US09557083

申请日：2000-04-21

Applicant: Reinhard Gerhardy

Inventor： Reinhard Gerhardy

IPC: F02M1704

CPC classification number: F02B25/20 ,  F02M13/02 ,  F02M13/023 ,  Y10S261/01 ,  Y10S261/68

Abstract: A diaphragm-type carburetor is provided for a two-cycle engine, in a manually guided implement, that operates with layered scavenging. Formed in the carburetor housing is an intake channel portion in which is disposed a butterfly valve that is pivotably held by a shaft. Opening into the intake channel portion are fuel-conveying channels supplied from a fuel-filled control chamber that is formed on a longitudinal side of the intake channel portion in the carburetor housing and is separated from a compensation chamber by a diaphragm. Air for combustion is additionally supplied to the engine via an air channel formed in a functional component of the carburetor fixed on the housing thereof on a longitudinal side of the intake channel portion. The air channel is disposed approximately parallel to the intake channel portion and is guided from that end face of the carburetor that faces an air filter to the connecting side of the carburetor that faces the internal combustion engine. Disposed in the air channel is a throttle member that is rotatably held by a shaft, which is coupled together with the shaft of the butterfly valve by means of a transmission connection.

Abstract translation: 在手动导向工具中，为双冲程发动机提供隔膜式化油器，其通过层状扫气运行。 在化油器壳体中形成有进气通道部分，其中设置有由轴可枢转地保持的蝶阀。 进入入口通道部分的是从燃料填充控制室供给的燃料输送通道，其形成在化油器壳体中的进气通道部分的纵向侧上，并通过隔膜与补偿室分离。 通过形成在固定在其壳体上的化油器的功能部件中的空气通道，在进气通道部分的纵向侧，另外向发动机供给燃烧用空气。 空气通道大致平行于进气通道部分设置，并且从面向空气过滤器的化油器的端面被引导到面向内燃机的化油器的连接侧。 设置在空气通道中的节流构件是可旋转地保持在轴上的节流构件，其通过传动连接与蝶阀的轴联接在一起。

公开(公告)号：US5441673A

公开(公告)日：1995-08-15

申请号：US325939

申请日：1994-10-19

Applicant: Reinhard Gerhardy

Inventor： Reinhard Gerhardy

IPC: F02M3/09 ,  F02M3/10 ,  F02M3/12 ,  F02M17/04

CPC classification number: F02M3/10 ,  F02M17/04 ,  F02M3/09 ,  F02M3/12 ,  Y10S261/38 ,  Y10S261/68

Abstract: The invention is directed to a carburetor for an internal combustion engine and includes an intake channel having a throttle flap mounted therein. Fuel passes from a fuel-filled control chamber via channels to main and idle nozzles through which the fuel enters the intake channel. The maximum permissible fuel quantity must be adjusted during a test run be means of an adjusting screw. This value can be changed by an operator. The maximum flow cross section for the fuel throughput is limited by at least one fixed throttle to which the main nozzle and the idle chamber are connected at the downstream end. In this way, strict exhaust-gas limit values are maintained. An adjustable throttle is provided with the aid of which the entire flow cross section can be reduced up to a pregiven minimum value. The carburetor described above is especially suitable for two-stroke engines of portable handheld work apparatus.

Abstract translation: 本发明涉及一种用于内燃机的化油器，并且包括其中安装有节流阀的进气通道。 燃料从燃料填充的控制室通过通道经过主和空的喷嘴，燃料进入进气通道。 在试运行期间必须调整最大允许燃油量，作为调整螺丝的装置。 该值可由操作员更改。 用于燃料通过量的最大流动横截面由在下游端连接有主喷嘴和空闲室的至少一个固定节气门限制。 以这种方式，维持严格的废气极限值。 提供了可调节的节流阀，借助该节流阀可以将整个流动横截面减小到预定的最小值。 上述化油器特别适用于便携式手持式工作装置的二冲程发动机。

公开(公告)号：US5259352A

公开(公告)日：1993-11-09

申请号：US013970

申请日：1993-02-05

Applicant: Reinhard Gerhardy ,  Werner Vonderau

Inventor： Reinhard Gerhardy ,  Werner Vonderau

IPC: F02M17/04 ,  F02M37/02 ,  F02M37/12 ,  F04B43/02 ,  F04B43/06 ,  F04B43/067 ,  F02B33/04

CPC classification number: F04B43/067 ,  F02M17/04 ,  F02M37/02 ,  F02M37/046

Abstract: The invention is directed to a membrane fuel pump for a membrane carburetor of an internal combustion engine. The carburetor has a pressure controller and the engine has a crankcase wherein pressure fluctuates during the operation thereof. The membrane fuel pump includes a pump membrane mounted in a housing which partitions a space of the housing into a pump chamber for receiving fuel from a fuel supply connection and a drive chamber. The drive chamber is charged with the pressure of the crankcase. A pressure connection connects the pump chamber to the pressure controller of the membrane carburetor. A bypass channel connects the pressure connection to the fuel supply connection and a valve is interposed between the pressure connection and the bypass channel. This valve is responsive to the pressure present in the pressure connection for switching the valve between a first position wherein the bypass channel is open to the pressure connection and a second position wherein the bypass channel is closed to the pressure connection.

Abstract translation: 本发明涉及一种用于内燃机的膜式化油器的膜式燃料泵。 化油器具有压力控制器，并且发动机具有曲轴箱，其中压力在其操作期间波动。 膜式燃料泵包括安装在壳体中的泵膜，其将壳体的空间分隔成泵室，用于从燃料供应连接件和驱动室接收燃料。 驱动室对曲轴箱的压力进行充电。 压力连接将泵室连接到膜式化油器的压力控制器。 旁路通道将压力连接件连接到燃料供应连接器，并且阀门介于压力连接件和旁路通道之间。 该阀响应于压力连接中存在的压力，用于在旁路通道与压力连接打开的第一位置和旁路通道关闭到压力连接的第二位置之间切换阀。

公开(公告)号：US5252261A

公开(公告)日：1993-10-12

申请号：US29608

申请日：1993-03-11

Applicant: Reinhard Gerhardy

Inventor： Reinhard Gerhardy

IPC: F02M3/10 ,  F16B41/00 ,  F02M3/08

CPC classification number: F16B41/005 ,  F02M3/10 ,  F02M2003/105 ,  Y10S261/38 ,  Y10S261/84 ,  Y10T137/7062

Abstract: The invention is directed to an adjustment safeguard for an adjusting screw rotatably held in a housing. The adjusting screw has a head which projects outside of the housing and a cap is mounted on the head of the adjusting screw so as to be accessible to an operator for imparting a rotational movement thereto. The cap has an appendage formed thereon and stops are provided which coact with the appendage to delimit the rotational range through which the adjusting screw can be rotated. A sleeve is disposed in surrounding relationship to the cap and is connected thereto. The cap is disposed almost entirely within the sleeve so that an operator cannot reach the cap for levering the latter off the adjusting screw without causing permanent visible damage to the safeguard. Accordingly, an effective tampering with the adjusting screw for obtaining a setting outside of the permitted adjusting range is effectively prevented since such a tampering will leave permanent visible damage.

Abstract translation: 本发明涉及一种可旋转地保持在壳体中的调节螺钉的调节保护装置。 调节螺钉具有突出于壳体外部的头部，并且帽被安装在调节螺钉的头部上，以便操作者可接近以便向其施加旋转运动。 盖子具有形成在其上的附件，并且提供止动件，其与附件共同定界可以旋转调节螺钉的旋转范围。 套筒与盖子相关联地设置并与之连接。 盖几乎完全设置在套筒内，使得操作者不能到达帽子，以将其从调节螺钉上推开而不会对保护装置造成永久的可见损坏。 因此，有效地防止了用于获得设定在允许的调节范围之外的调节螺钉的有效的篡改，因为这样的篡改将留下永久可见的损坏。

公开(公告)号：US4936267A

公开(公告)日：1990-06-26

申请号：US267847

申请日：1988-11-07

Applicant: Reinhard Gerhardy ,  Michael Wissmann

Inventor： Reinhard Gerhardy ,  Michael Wissmann

IPC: F02M1/16 ,  F02M17/04

CPC classification number: F02M17/04 ,  F02M1/16 ,  Y10S261/08 ,  Y10S261/68

Abstract: The invention relates to a carburetor for an internal combustion engine and especially for a portable small engine. The carburetor includes a carburetor housing defining an intake pipe and a control chamber which communicates with the intake pipe via intake channels. A fuel-feed line which is closable by an inlet valve opens into the control chamber. The inlet valve includes a valve seat formed in the fuel-feed line and a valve body mounted on a positioning lever which is connected to a membrane defining a wall of the control chamber. The positioning lever can be pivotally actuated to open the inlet valve to admit fuel into the control chamber. An actuating lever is pivotally mounted on the carburetor housing and can be pivoted from a rest position to an active position whereat the actuating lever applies a force against the membrane to displace the latter and pivotally actuate the positioning lever to immediately open the inlet valve when starting the engine.

Abstract translation: 本发明涉及一种用于内燃机，特别是便携式小型发动机的化油器。 化油器包括限定进气管的化油器壳体和通过进气通道与进气管连通的控制室。 通过入口阀关闭的燃料供给管线通向控制室。 入口阀包括形成在燃料供给管线中的阀座和安装在定位杆上的阀体，定位杆连接到限定控制室的壁的膜。 定位杆可以被枢转地驱动以打开入口阀，以将燃料引入控制室。 驱动杆枢转地安装在化油器壳体上，并且可以从静止位置枢转到主动位置，在该位置，致动杆向膜施加力以使其移动，并且枢转地致动定位杆，以在起动时立即打开入口阀 引擎。

公开(公告)号：US4455266A

公开(公告)日：1984-06-19

申请号：US396742

申请日：1982-07-09

Applicant: Reinhard Gerhardy

Inventor： Reinhard Gerhardy

IPC: F02M1/16 ,  F02M7/06 ,  F02M17/04

CPC classification number: F02M1/16 ,  F02M17/04 ,  F02M7/06 ,  Y10S261/08 ,  Y10S261/68 ,  Y10S261/81

Abstract: A carburetor for internal combustion engines, especially for very small portable engines. The carburetor has a control chamber arranged in the carburetor in the fuel supply to the intake pipe. The control chamber is connected with the intake pipe via inlet passages, the rate or quantity of flow through which can be regulated, and is connected with fuel feed supplied by a fuel pump via an inlet valve, which is biased in the closed position. The inlet valve is opened by a control membrane which delimits the control chamber. The control membrane, on that side thereof remote from the control chamber, delimits an equalizing chamber along with a closure cover fastened to the carburetor housing. The equalizing chamber is constructed as a pressure chamber which can be selectively connected via a reversing or change-over valve with either the crankcase housing of the internal combustion engine, or with the atmosphere.

Abstract translation: 用于内燃机的化油器，特别适用于非常小的便携式发动机。 化油器具有设置在化油器中的控制室，该控制室在进气管的燃料供应中。 控制室通过入口通道与进气管连接，通过该通道可以调节流量或流量，并且通过经偏压在关闭位置的入口阀由燃油泵供油的燃料供给装置连接。 入口阀由限制控制室的控制膜打开。 控制膜在远离控制室的一侧上，与固定在化油器壳体上的封闭盖一起限定均衡室。 均压室被构造为压力室，该压力室可以经由与内燃机的曲轴箱壳体或大气相连的反向或转换阀选择性地连接。