公开(公告)号：US5197418A

公开(公告)日：1993-03-30

申请号：US940995

申请日：1992-09-04

申请人： Michael Wissmann ,  Hans Nickel ,  Ralf Tuckermann ,  Werner Geyer

发明人： Michael Wissmann ,  Hans Nickel ,  Ralf Tuckermann ,  Werner Geyer

IPC分类号： F02B63/02 ,  F02B75/02 ,  F02B75/12 ,  F02M59/10 ,  F02M59/20 ,  F02M59/30 ,  F02M67/02 ,  F02M69/10

CPC分类号： F02M69/10 ,  F02M59/107 ,  F02M59/30 ,  F02B2075/025 ,  F02B2075/125 ,  Y02T10/123

摘要： The invention is directed to a fuel injection pump for a two-stroke engine which is especially for portable handheld tools such as motor-driven chain saws or the like. A pneumatic drive chamber is provided in the pump housing which is partitioned by a membrane into a pulse chamber charged by the crankcase pressure and a return chamber. A membrane plate holds the membrane and charges a pump piston which plunges into a pump cylinder for injecting fuel when a pulse is present in the pulse chamber. The pump piston draws fuel in by suction during a return stroke of the membrane plate into a start position determined by a stop. The stop is configured so as to be displaceable in the direction of the stroke of the piston in dependence upon temperature in order to obtain an adaptation of the injected quantity of fuel to the operating temperature of the engine. In this way, the stroke of the pump piston can be varied and therefore also the quantity of fuel supplied by the pump.

摘要翻译： 本发明涉及用于二冲程发动机的燃料喷射泵，其特别适用于诸如电动链锯等便携式手持工具。 在泵壳体中设置气动驱动室，该壳体由膜分隔成由曲轴箱压力充电的脉冲室和回流室。 膜片保持膜并且当在脉冲室中存在脉冲时将泵活塞充入泵活塞，泵活塞用于喷射燃料。 泵活塞在膜片的返回行程期间通过抽吸将燃料吸入由停止确定的起始位置。 挡块被构造成可以根据温度在活塞的行程方向上移动，以便获得喷射量与发动机的工作温度的适应性。 以这种方式，泵活塞的行程可以变化，因此也可以由泵供给的燃料量。

公开(公告)号：US4567658A

公开(公告)日：1986-02-04

申请号：US571476

申请日：1984-01-17

申请人： Michael Wissmann ,  Hans Nickel ,  Erich Zollner

发明人： Michael Wissmann ,  Hans Nickel ,  Erich Zollner

IPC分类号： B27B17/14

CPC分类号： B27B17/14 ,  Y10T83/7239

摘要： The invention is directed to a tensioning arrangement for adjusting the tension in the saw chain of a chain saw. The cutter bar for the saw chain has an elongated opening for engaging the guiding means upon which the cutter bar is displaceably mounted and guided in the housing of the chain saw. The tensioning arrangement includes a bolt-like drive member which extends through the elongated opening of the cutter bar and acts upon an output member via a transmission. The output member is configured as a slider which entrains the cutter bar for displacing the latter to tension the saw chain. The drive member extends through the elongated opening and beyond the housing as well as the cover of the sprocket wheel to the outside so that it can be adjusted conveniently and simply from outside of the housing for tensioning the saw chain.

摘要翻译： 本发明涉及一种用于调节链锯的锯链中的张力的张紧装置。 用于锯链的切割杆具有细长的开口，用于接合引导装置，在该引导装置上刀具杆可移动地安装并引导到链锯的壳体中。 张紧装置包括螺栓状驱动构件，其延伸穿过切割杆的细长开口并通过变速器作用在输出构件上。 输出构件被构造为滑块，该滑块夹住切割杆以使其移动以张紧锯链。 驱动构件延伸穿过细长的开口并且超过壳体以及链轮的盖子到外部，使得其可以从外壳的外部方便地简单地调节，以张紧锯链。

公开(公告)号：US5419686A

公开(公告)日：1995-05-30

申请号：US92918

申请日：1993-07-19

申请人： Michael Wissmann ,  Hans Nickel ,  Roland Schierling ,  Roland Adam ,  Werner Geyer

发明人： Michael Wissmann ,  Hans Nickel ,  Roland Schierling ,  Roland Adam ,  Werner Geyer

IPC分类号： F02M37/06 ,  F02B75/02 ,  F02M37/04 ,  F02M37/12 ,  F04B43/02 ,  F04B43/06 ,  F04B53/10 ,  F04B17/00 ,  F02B33/04

CPC分类号： F02M37/12 ,  F02M37/046 ,  F04B53/1065 ,  F04B53/107 ,  F02B2075/025

摘要： The invention is directed to a fuel pump for an internal combustion engine such as a two-stroke engine in a portable handheld work apparatus such as a motor-driven chain saw or the like. A pump chamber is connected via a suction valve to a fuel feed and via a pressure valve to a pressure line. A pump membrane delimits the pump chamber and is driven by the fluctuating crankcase pressure of the engine which is present in the work chamber. Pump operation free of disturbances over a wide rpm range is attained with the suction valve to the pump chamber being configured essentially as a valve having the shape of a part circle, The pressure valve is disposed approximately at the center of the suction valve and delimits the pump chamber in the stroke direction of the pump membrane.

摘要翻译： 本发明涉及一种用于诸如电动链锯等的便携式手持式工作装置中的诸如二冲程发动机的内燃机的燃料泵。 泵室通过吸入阀连接到燃料进料口并通过压力阀连接到压力管路。 泵膜限定泵室，并由存在于工作室中的发动机的曲轴箱压力波动驱动。 通过泵室的吸入阀基本上被构造为具有部分圆形形状的阀，实现了在宽的转速范围内没有扰动的泵操作。压力阀大致设置在吸入阀的中心并限定 泵室在泵膜的冲程方向。

公开(公告)号：US4976246A

公开(公告)日：1990-12-11

申请号：US262146

申请日：1988-10-21

申请人： Roland Schierling ,  Michael Wissmann ,  Hans Nickel ,  Werner Geyer

发明人： Roland Schierling ,  Michael Wissmann ,  Hans Nickel ,  Werner Geyer

IPC分类号： F02M69/02 ,  B27B17/00 ,  F02B33/04 ,  F02B63/02 ,  F02B75/02 ,  F02M39/02 ,  F02M59/10 ,  F02M59/44 ,  F02M69/10

CPC分类号： F02B63/02 ,  F02B33/04 ,  F02M39/02 ,  F02M59/107 ,  F02M59/445 ,  F02M69/10 ,  F02B2075/025

摘要： The invention relates to a handheld portable tool driven by a two-stroke engine equipped with a pneumatically actuated injection pump. Injection pumps for two-stroke engines are generally rigidly connected to the engine so that the injection line can be rigid and as short as possible. This, however, leads to operational disturbances in the injection pump. To eliminate these disturbances, the injection pump is mounted in a thermally insulated handle housing portion of the tool which is damped with respect to the vibrations of the engine and is connected to the latter via flexible connecting lines.

摘要翻译： 本发明涉及一种由配有气动致动注射泵的二冲程发动机驱动的手持便携式工具。 用于二冲程发动机的注射泵通常刚性地连接到发动机，使得注射管线可以是刚性的并且尽可能短。 然而，这会导致注射泵的操作紊乱。 为了消除这些干扰，注射泵安装在工具的绝热手柄壳体部分中，该部分相对于发动机的振动而被阻尼，并且通过柔性连接线与后者连接。

公开(公告)号：US4696264A

公开(公告)日：1987-09-29

申请号：US764220

申请日：1985-08-09

申请人： Werner Vondernau ,  Jurgen Weber ,  Hans Nickel ,  Michael Wissmann ,  Harald Schliemann

发明人： Werner Vondernau ,  Jurgen Weber ,  Hans Nickel ,  Michael Wissmann ,  Harald Schliemann

IPC分类号： F02B75/02 ,  F02D9/02 ,  F02D11/06 ,  F02D11/08 ,  F02D17/04 ,  F02D41/22 ,  F02B33/04

CPC分类号： F02D9/02 ,  F02D11/08 ,  F02D17/04 ,  F02B2075/025 ,  F02D2009/0203 ,  F02D2009/0208 ,  F02D2009/0267 ,  F02D2009/0286 ,  F02D2400/04

摘要： A two-stroke engine is disclosed which is controlled by a carburetor throttle valve and has a crankcase subjected to continuously alternating overpressure and underpressure. A pneumatic control member responsive to a signal dependent on the rotational speed of the engine is in pressure communication with the inner chamber of the crankcase via a valve. The output member of the pneumatic control member is connected with the throttle flap of the carburetor. The valve provided between the crankcase and the pneumatic control member is responsive to a signal for controlling the pressure in the pneumatic control member. This valve can be configured as a resonance control valve fixedly mounted to the housing of the engine. The resonance control valve has a mass oscillator which, at a correspondingly high engine speed and as a result of the vibration frequency associated therewith, acts upon a sealing diaphragm in the resonance control valve to open a pass-through opening communicating with the pneumatic control member.

摘要翻译： 公开了一种二冲程发动机，其由化油器节流阀控制并且具有经受连续交替的超压和负压的曲轴箱。 响应于取决于发动机的转速的信号的气动控制构件经由阀与曲轴箱的内室压力连通。 气动控制构件的输出构件与化油器的节气门瓣连接。 设置在曲轴箱和气动控制构件之间的阀响应于用于控制气动控制构件中的压力的​​信号。 该阀可以被配置为固定地安装到发动机壳体上的共振控制阀。 谐振控制阀具有质量振荡器，该质量振荡器在相应高的发动机转速下和作为与其相关联的振动频率的结果作用在共振控制阀中的密封隔膜上，以打开与气动控制构件连通的通过开口 。

公开(公告)号：US5353754A

公开(公告)日：1994-10-11

申请号：US93155

申请日：1993-07-19

申请人： Michael Wissmann ,  Hans Nickel ,  Roland Schierling ,  Roland Adam ,  Manfred Thaiss ,  Werner Geyer

发明人： Michael Wissmann ,  Hans Nickel ,  Roland Schierling ,  Roland Adam ,  Manfred Thaiss ,  Werner Geyer

IPC分类号： F02B75/02 ,  F02M37/04 ,  F02M37/12 ,  F02M55/04 ,  F02M59/10 ,  F02M59/14 ,  F02M59/46 ,  F02M69/10 ,  F02M69/34 ,  F04B45/053 ,  F04B53/00 ,  F02B33/04

CPC分类号： F02M69/34 ,  F02M37/043 ,  F02M37/12 ,  F02M55/04 ,  F02M59/107 ,  F02M59/14 ,  F02M69/10 ,  F02B2075/025 ,  Y10S123/05

摘要： The invention is directed to a fuel-injection arrangement for a two-stroke engine in a motor-driven chain saw. An injection pump is mounted in a base housing with the injection pump including a pump piston axially displaceable in a pump cylinder. The pump piston delimits a pump chamber. The pump chamber is connected via a suction valve to a fuel tank. The fuel drawn by suction is pumped by the pump piston via a pressure valve, an injection line and an injection valve to the engine. For driving the pump piston, the latter is connected at one end to a membrane via a membrane plate. The membrane delimits a work chamber charged with fluctuating crankcase pressure. A simple assembly is provided by arranging the pump chamber, the suction valve and the pressure valve in a common valve housing which, in turn, is seated in the base housing of the injection pump in a seal-tight manner. The injection line is connected directly to the valve housing. This permits a preassembly of the valve housing with the valves provided therein which facilitates the manufacture of the fuel-injection arrangement.

摘要翻译： 本发明涉及一种用于电动链锯中的二冲程发动机的燃料喷射装置。 注射泵安装在基座壳体中，注射泵包括在泵缸中可轴向移位的泵活塞。 泵活塞限定泵室。 泵室通过吸入阀连接到燃料箱。 通过抽吸抽吸的燃料由泵活塞通过压力阀，注射管线和喷射阀泵送到发动机。 为了驱动泵活塞，后者通过膜板在一端连接到膜。 隔膜界定了带有波动的曲轴箱压力的工作室。 通过将泵室，吸入阀和压力阀布置在共同的阀壳中来提供简单的组件，该阀壳又以密封的方式安置在注射泵的基座中。 注射管线直接连接到阀壳体。 这允许阀壳体与其中设置的阀预组装，这有助于燃料喷射装置的制造。

公开(公告)号：US4979477A

公开(公告)日：1990-12-25

申请号：US388929

申请日：1989-08-03

申请人： Hans Nickel ,  Michael Wissmann

发明人： Hans Nickel ,  Michael Wissmann

IPC分类号： F02B1/04 ,  F02B63/02 ,  F02B75/02 ,  F02P5/15 ,  F02P9/00

CPC分类号： F02B63/02 ,  F02P5/1502 ,  F02P9/002 ,  F02P9/005 ,  F02B1/04 ,  F02B2075/025 ,  Y02T10/46

摘要： The invention is directed to an ignition circuit for an internal combustion engine such as a two-stroke engine of a handheld, portable tool such as a motor-driven chain saw or the like. The engine has a cylinder and a piston conjointly defining a combustion chamber and a crankshaft connected to the piston. The ignition circuit includes a spark plug mounted in the cylinder and voltage source. A switch is actuable between an on-condition wherein the voltage source is connected to the spark plug for initiating a spark in the chamber and an off-condition wherein the voltage source is disconnected from the spark plug. An electronic control circuit actuates the switch between the two conditions in dependence upon the angular position of the crankshaft and other operating parameters of the engine such as the engine speed. The electronic control circuit includes a high-speed control circuit and an idle-speed control circuit for determining the firing time in the control range of the idle speed.

摘要翻译： 本发明涉及一种用于内燃机的点火电路，例如诸如电动链锯等的手持便携式工具的二冲程发动机。 发动机具有连接到活塞的燃烧室和曲轴的气缸和活塞。 点火电路包括安装在气缸和电压源中的火花塞。 开关可以在其中电压源连接到火花塞以用于在室中引发火花的状态和其中电压源与火花塞断开的关闭的状态下致动。 电子控制电路根据曲轴的角度位置和发动机的其他操作参数（例如发动机转速）来在两个状态之间驱动开关。 电子控制电路包括高速控制电路和怠速控制电路，用于确定怠速转速的控制范围内的点火时间。

公开(公告)号：US4819779A

公开(公告)日：1989-04-11

申请号：US36016

申请日：1987-04-08

申请人： Hans Nickel ,  Michael Wissmann ,  Horst Scholz

发明人： Hans Nickel ,  Michael Wissmann ,  Horst Scholz

IPC分类号： F16D43/14 ,  B27B17/10 ,  F16D43/18

CPC分类号： F16D43/18 ,  B27B17/10

摘要： A centrifugal clutch for use especially in a motor-driven chain saw. The clutch includes a carrier which is provided for attachment to a drive shaft and on which radially moveable centrifugal weights are mounted. The weights can move radially outwardly under centrifugal force and counter to spring force and come into contact engagement with the drum which is the output end of the clutch. A restraining device is provided between each centrifugal weight 2 and carrier 1 so that the engagement of the clutch does not occur until after an elevated speed has been reached. Disengagement of the clutch occurs as in known clutches somewhat above the idling speed. The restraining device is configured so that it does not clear the outward path of the centrifugal weight until a certain minimum centrifugal force has been exceeded. This has the effect that the clutch engages suddenly at mid range speeds and can transmit a very high initial torque to the output tool driven through the clutch.

摘要翻译： 一种特别用于电动链锯的离心式离合器。 该离合器包括一个载体，该载体被设置用于附接到一个驱动轴上并且其上安装有可径向移动的离心重物。 重量可以在离心力和反作用力下径向向外移动，并与作为离合器输出端的滚筒接触。 在每个离心配重2和承载件1之间设有约束装置，使得离合器的接合直到达到高速之后才会发生。 离合器的脱离发生在已知的离合器中稍微高于空转速度。 限制装置构造成使得它不能清除离心重物的向外的路径，直到超过某一最小离心力。 这具有离合器在中速范围内突然接合并且可以将非常高的初始扭矩传递到通过离合器驱动的输出工具的效果。

公开(公告)号：US4773362A

公开(公告)日：1988-09-27

申请号：US62121

申请日：1987-06-15

申请人： Michael Wissmann ,  Hans Nickel ,  Jurgen Weber

发明人： Michael Wissmann ,  Hans Nickel ,  Jurgen Weber

IPC分类号： F02M1/08 ,  F02B75/02 ,  F02M1/10

CPC分类号： F02M1/10 ,  F02B2075/025

摘要： An automatic starting arrangement for a hand-started internal combustion engine is disclosed. Internal combustion engines of this type have a choke flap and a throttle flap positioned one behind the other in the air-intake channel. In order to ensure a reliable starting of the engine independently of manual positioning activities, the invention provides that in the starting operation, the choke flap initially moves independently of the throttle flap. The throttle flap is held in a half-throttle position between the full-throttle position and the idle position. Before the choke flap is brought into its at-rest no-choke position, a movable holding mechanism is actuated and the throttle flap is released.

摘要翻译： 公开了一种手动起动内燃机的自动启动装置。 这种类型的内燃机在进气通道中具有扼流圈和一个在另一个之后定位的节流阀。 为了确保独立于手动定位活动的发动机的可靠启动，本发明提供了在启动操作中，扼流圈最初独立于节流阀片移动。 节气门瓣在全节气门位置和空转位置之间保持在半节气门位置。 在扼流圈进入其静止无阻塞位置之前，启动可动保持机构并释放节流阀。

公开(公告)号：US4635777A

公开(公告)日：1987-01-13

申请号：US722080

申请日：1985-04-11

申请人： Hans Nickel ,  Michael Wissmann

发明人： Hans Nickel ,  Michael Wissmann

IPC分类号： B27B17/10 ,  F16D43/18 ,  F16D13/18

CPC分类号： B27B17/10 ,  F16D43/18

摘要： A centrifugal clutch has a carrier and at least two centrifugal weights which are each connected to the carrier by means of at least one spring. These centrifugal weights are pivotally mounted on the carrier and are preloaded radially inwardly with respect to the carrier by means of the springs. In this way, the centrifugal weights have a defined pivot axis so that they can pivotally move from their rest position to the coupling position when the rotational speed exceeds a predetermined speed above no-load speed. By preloading the centrifugal weights, the latter are prevented from pivoting outwardly at speeds below no-load speed so that the centrifugal weights do not strike the clutch drum at rotational speeds beneath a predetermined value.

摘要翻译： 离心式离合器具有载体和至少两个离心重物，每个离心重物通过至少一个弹簧连接到载体。 这些离心重物枢转地安装在载体上，并通过弹簧相对于载体径向向内预加载。 以这种方式，离心重物具有确定的枢转轴线，使得当转速超过空载速度以上的预定速度时，它们可以从其静止位置枢转地移动到联接位置。 通过预先加载离心重物，防止后者在低于空载速度的速度下向外转动，使得离心重量不会以低于预定值的转速撞击离合器鼓。