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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
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。
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公开(公告)号：US5447131A
公开(公告)日：1995-09-05
申请号：US285303
申请日：1994-08-03
申请人： Hans Nickel , Thomas Schuster , Michael Wissmann
发明人： Hans Nickel , Thomas Schuster , Michael Wissmann
CPC分类号： F02P5/1502 , F02P9/005 , Y02T10/46
摘要： The invention is directed to an ignition circuit for an internal combustion engine in a portable handheld work apparatus wherein a work tool is driven via a clutch. The ignition circuit includes an ignition time point control which connects a spark plug via a switch to a voltage source in order to trigger an ignition spark. The spark plug is mounted in the combustion chamber of the engine. This connection takes place in dependence upon the crankshaft angle and the rpm of the engine. In order to prevent damage to the clutch because of a blocked work tool, a test value counter driven via a rpm gate circuit is provided. The test value counter increments its value in the pregiven rpm window of the gate circuit with each rotation of the crankshaft and the content of the test value counter is compared to a pregiven limit value by a comparator. The output of the comparator activates a rpm-reducing protective circuit and the output of the comparator indicates reaching or exceeding the limit value.
摘要翻译： 本发明涉及一种便携式手持式工作装置中用于内燃机的点火电路，其中通过离合器驱动作业工具。 点火电路包括点火时间点控制，其通过开关将火花塞连接到电压源以触发点火火花。 火花塞安装在发动机的燃烧室中。 这种连接取决于发动机的曲轴角度和转速。 为了防止由于工作工具被堵塞而对离合器造成损坏，提供了通过rpm门电路驱动的测试值计数器。 测试值计数器在曲轴的每次旋转时增加门电路的预定转速窗口中的值，并通过比较器将测试值计数器的内容与预定极限值进行比较。 比较器的输出启动减速保护电路，比较器的输出指示达到或超过极限值。
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3.发明授权Ignition arrangement for an internal combustion engine of a handheld portable tool 失效用于手持便携式工具的内燃机的点火装置
公开(公告)号：US4709669A
公开(公告)日：1987-12-01
申请号：US907045
申请日：1986-09-12
申请人： Michael Wissmann , Jurgen Weber , Hans Nickel
发明人： Michael Wissmann , Jurgen Weber , Hans Nickel
CPC分类号： F02P1/02 , F02B63/02 , F02B2075/025 , F02B2075/027
摘要： The invention is directed to an ignition arrangement for an internal combustion engine of a handheld portable tool such as a chain saw or the like. The engine has a crankshaft and a fan wheel is seated on the crankshaft for rotation therewith. The ignition arrangement includes a permanent magnet. The magnet has two pole shoes and an exciter coil is mounted on the permanent magnet. The permanent magnet equipped in this way is fixedly mounted on the tool to save weight. A relatively light self-supporting annular member with projections is mounted in the fan wheel. The projections of the annular member and the permanent magnet with its pole shoes conjointly define a magnetic circuit. As the projections pass the pole shoes at a minimal spacing therefrom during operation of the engine, the projections alternately open and close the magnetic circuit thereby causing changes in the flux of this circuit. The flux changes cause a voltage to be inducted in the exciter coil which serves to generate the igniting spark via an appropriate electronic circuit.
摘要翻译： 本发明涉及一种用于诸如链锯等手持便携式工具的内燃机的点火装置。 发动机具有曲轴并且风扇轮座落在曲轴上以与其一起转动。 点火装置包括永磁体。 磁铁具有两个极靴，励磁线圈安装在永磁体上。 以这种方式配备的永磁体固定安装在工具上以节省重量。 具有突起的相对轻的自支撑环形构件安装在风扇轮中。 环形构件和永磁体与其极靴的突起共同限定了磁路。 由于在发动机运转期间突起以极小的间隔通过极靴，所以突起交替地打开和关闭磁路，从而引起该电路的通量的变化。 磁通变化导致在激励器线圈中感应出电压，该电压用于通过适当的电子电路产生点火火花。
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公开(公告)号：US4672929A
公开(公告)日：1987-06-16
申请号：US809013
申请日：1985-12-13
申请人： Michael Wissmann , Hans Nickel , Jurgen Weber
发明人： Michael Wissmann , Hans Nickel , Jurgen Weber
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 start position the choke flap is coupled with the throttle flap in a position-dependent manner and the choke flap holds the throttle flap in a position between the full-throttle position and the idle position. The choke flap is brought into an at-rest position via an actuating device which is actuable in dependence upon the operating condition of the engine. The choke flap is decoupled from the throttle flap in the at-rest position.
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，本发明提供了在起始位置中，扼流圈与节气门瓣以位置相关的方式联接，扼流圈将节气门瓣保持在位置 在全节气门位置和空转位置之间。 扼流圈通过致动装置进入静止位置，该致动装置可根据发动机的操作状态而致动。 扼流圈在静止位置与节气门瓣分离。
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公开(公告)号：US5365893A
公开(公告)日：1994-11-22
申请号：US93160
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： F02B63/02 , F02B75/02 , F02M37/12 , F02M37/18 , F02M59/10 , F02M59/14 , F02M69/10 , F02N19/00 , F02B33/04
CPC分类号： F02B63/02 , F02M37/18 , F02M59/107 , F02M59/14 , F02M69/10 , F02B2075/025 , F02M37/046 , Y10S123/05
摘要： The invention is directed to a fuel-injection arrangement for a two-stroke engine in a portable handheld work apparatus such as a motor-driven chain saw or the like. Fuel is drawn by suction from a fuel tank by a fuel-feed pump and is made available at the suction connection of an injection pump. The injection pump has a pressure connection which is connected to an injection line through which the engine is supplied with fuel. A rapid start of a two-stroke engine provided with this fuel-injection arrangement is achieved by providing a bypass line which conducts fuel and bypasses the injection pump. A switchable flow valve is mounted in the bypass line. The bypass line opens directly into the intake channel conducting combustion air to the engine so that even without the pump action of the injection pump, adequate fuel is made available to the engine for starting the same.
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二冲程发动机的燃料喷射装置。 燃料通过燃料供给泵从燃料箱的抽吸抽吸并且在注射泵的吸入连接处可用。 喷射泵具有压力连接，其连接到发动机通过其被供应燃料的喷射管线。 提供这种燃料喷射装置的二冲程发动机的快速启动通过提供一个旁路管线来实现，该旁路管路引导燃料并绕过喷射泵。 可切换流量阀安装在旁路管路中。 旁路管路直接打开到进气通道中，将燃烧空气传导到发动机，使得即使没有喷射泵的泵作用，也可以向发动机提供足够的燃料用于启动喷射泵。
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6.发明授权
公开(公告)号：US5209196A
公开(公告)日：1993-05-11
申请号：US884206
申请日：1992-05-18
申请人： Hans Nickel , Michael Wissmann
发明人： Hans Nickel , Michael Wissmann
CPC分类号： F02P11/04 , F02D11/02 , F02M1/02 , F02D2009/0254 , F02D2009/0294
摘要： The invention relates to an operating-mode position selector arrangement for an internal combustion engine in a portable handheld tool such as a motor-driven chain saw. The engine includes an electrical ignition system and is supplied with a fuel mixture by a carburetor. In a start position of the operating-mode position selector, the position selector holds the choke flap and the throttle flap of the carburetor in pregiven start positions. In an operating position of the operating-mode position selector, the throttle flap is released for actuation via a throttle lever and the choke flap is fully opened. In a stop position of the operating-mode position selector, an electric contact is closed between a terminal of the electric ignition system and ground. The different positions of the operating-mode position selector are detected electrically. This is achieved in that for the operating position of the operating-mode position selector, the terminal of the electric ignition system is connected to ground via a further electric contact and a resistor. In this way, the operating position of the operating-mode position selector can be distinguished from the stop position and the start position because of the different voltages which adjust in each position.
摘要翻译： 本发明涉及一种用于诸如电动链锯的便携式手持工具中的内燃机的操作模式位置选择器装置。 发动机包括电气点火系统，并由化油器供应燃料混合物。 在操作模式位置选择器的起始位置，位置选择器保持化油器的扼流圈和节气门瓣处于预先启动的位置。 在操作模式位置选择器的操作位置，节流阀被释放以通过节流杆进行致动，扼流圈完全打开。 在操作模式位置选择器的停止位置，电触点在电点火系统的端子和地之间闭合。 操作模式位置选择器的不同位置被电检测。 实现这一点，对于操作模式位置选择器的操作位置，电点火系统的端子经由另外的电触点和电阻器连接到地。 以这种方式，由于在每个位置调节的不同电压，操作模式位置选择器的操作位置可以与停止位置和起始位置区分开。
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公开(公告)号：US4807573A
公开(公告)日：1989-02-28
申请号：US202817
申请日：1988-06-06
申请人： Roland Schierling , Werner Geyer , Michael Wissmann , Hans Nickel
发明人： Roland Schierling , Werner Geyer , Michael Wissmann , Hans Nickel
CPC分类号： F02M59/107 , F02B2075/025
摘要： The invention is directed to a fuel injection arrangement for two-stroke engines for portable tools such as motor-driven saws. In known fuel-injecting arrangements, the injection pump is driven by the pressure of the crankcase. The crankcase pressure increases up to a maximum value which remains constant starting with a predetermined rotational speed up to and including the maximum rotational speed. When the peak pressure of the crankcase is constant, the stroke of the pump piston of the injection pump is also constant and so is the quantity of fuel which is pumped. However, at higher speeds where the speed is increasing because of throttling in the air intake channel, the air charge of the cylinder reduces and an overrich mixture is formed. The fuel injection arrangement of the invention provides for an automatic reduction in the quantity of fuel injected at high and at the highest speeds. For adapting the required quantity of fuel at high speeds, a counterpressure is developed in the return chamber of the injection pump in dependence upon speed whereby the stroke of the pump piston is reduced. In this way, a corresponding reduction of the pumped quantity of fuel is achieved.
摘要翻译： 本发明涉及用于诸如电动锯的便携式工具的二冲程发动机的燃料喷射装置。 在已知的燃料喷射装置中，喷射泵由曲轴箱的压力驱动。 曲轴箱压力增加到直到并包括最大转速为止的预定转速开始保持恒定的最大值。 当曲轴箱的峰值压力恒定时，喷射泵的泵活塞的行程也是恒定的，泵送的燃料量也是恒定的。 然而，在由于进气通道中的节流而在速度增加的较高速度下，气缸的气流减少并且形成了丰富的混合物。 本发明的燃料喷射装置提供了以高和最高速度喷射的燃料量的自动减少。 为了适应所需量的高速燃料，在注射泵的返回室中，根据速度产生反压力，由此泵活塞的行程减小。 以这种方式，实现了相应减少的泵送量的燃料。
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公开(公告)号：US4700668A
公开(公告)日：1987-10-20
申请号：US875407
申请日：1986-06-17
申请人： Roland Schierling , Werner Geyer , Michael Wissmann , Hans Nickel
发明人： Roland Schierling , Werner Geyer , Michael Wissmann , Hans Nickel
IPC分类号： F02D41/02 , F02B75/02 , F02D3/00 , F02M59/00 , F02M59/10 , F02M69/10 , F02M69/52 , F02B33/04
CPC分类号： F02M59/107 , F02B2075/025
摘要： The invention is directed to a method of fuel injection for two-stroke engines, especially for hand-operated tools such as motor-driven saws and the like. The fuel-injection pump is charged with pressure present in the crankcase thereby causing fuel to be pumped for injection and combustion in the engine. The injection operation is triggered and the onset of injection into the combustion chamber is effected when the crankcase pressure rises. The pressure conducted from the crankcase to the injection pump can be automatically regulated as a function of the rotational speed and/or load conditions of the engine.
摘要翻译： 本发明涉及一种用于二冲程发动机的燃料喷射方法，特别是用于诸如马达驱动锯等的手动工具。 燃料喷射泵对曲轴箱中存在的压力进行充电，从而使得燃料被泵送以在发动机中进行喷射和燃烧。 当曲轴箱压力升高时，喷射操作被触发并且进入燃烧室的喷射开始。 从曲轴箱传导到喷射泵的压力可以根据发动机的转速和/或负载条件自动调节。
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公开(公告)号：US4610229A
公开(公告)日：1986-09-09
申请号：US762103
申请日：1985-08-02
申请人： Michael Wissmann , Hans Nickel , Reinhold Fink , Michael Leuchte
发明人： Michael Wissmann , Hans Nickel , Reinhold Fink , Michael Leuchte
CPC分类号： B27B17/00 , F02B63/02 , F02F1/002 , F02B2075/025
摘要： A portable tool such as a motor-driven chain saw is disclosed which includes a cylinder, a piston, a connecting rod and a crankshaft. The crankshaft is rotatably journalled in crankshaft bearings and a crankcase made of plastic is provided. The bearing shells of the crankshaft bearings are releasably connected only to the cylinder and independently of the plastic crankcase. The plastic crankcase is likewise attached to the cylinder in such a manner that a housing arrangement is provided which is free of transmitted forces and is fully independent of the crankshaft bearings.
摘要翻译： 公开了一种诸如电动链锯的便携式工具，其包括气缸，活塞，连杆和曲轴。 曲轴可旋转地支承在曲轴轴承中，并提供由塑料制成的曲轴箱。 曲轴轴承的轴承壳体可释放地仅连接到气缸并且独立于塑料曲轴箱。 塑料曲轴箱同样地附接到缸体上，使得提供了一个没有传递力并且完全独立于曲轴轴承的壳体装置。
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公开(公告)号：US4597371A
公开(公告)日：1986-07-01
申请号：US704082
申请日：1985-02-21
申请人： Michael Wissmann , Hans Nickel
发明人： Michael Wissmann , Hans Nickel
CPC分类号： F02B63/02 , F02M39/005 , F02M59/102 , F02M59/14 , F02M59/30 , F02B2075/025
摘要： The invention is directed to a fuel injection apparatus for two-stroke engines and is especially for small engines of high-speed tools such as motor-driven chain saws, for example. It provides for the valve-controlled input of fuel into a pressure chamber of a housing and includes a spring-loaded pump piston journalled for reciprocatory movement in a bore to supply the fuel. The pump piston is sealed by an annular seal. For fuel induction, the pump piston has a passageway opening into the pressure chamber and a valve seat. The valve seat of the pump piston cooperates with a substantially free-flying sealing body for opening and closing the valve.
摘要翻译： 本发明涉及一种用于二冲程发动机的燃料喷射装置，特别适用于例如电动链锯等高速工具的小型发动机。 它提供了阀控制的输入到壳体的压力室中的燃料，并且包括一个弹簧加载的泵活塞，用于在孔中往复运动以供应燃料。 泵活塞由环形密封件密封。 对于燃料感应，泵活塞具有通向压力室的通道和阀座。 泵活塞的阀座与用于打开和关闭阀的基本上自由飞行的密封体配合。
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