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公开(公告)号：US4590896A
公开(公告)日：1986-05-27
申请号：US704083
申请日：1985-02-21
CPC分类号： F02D17/04 , F02D11/08 , F02D31/00 , F02D9/02 , F02B2075/025 , F02D2009/0203 , F02D2009/0208 , F02D2009/0267 , F02D2009/0286 , F02D2400/04
摘要： The invention is directed to a control system for a two-stroke engine for limiting a control quantity thereof such as the rotational speed. For this purpose, a pressure line including a valve is connected to the crankcase and leads to a pneumatic controlling member which is responsive to a mechanical or electrical signal (vibrations or electric pulse from the ignition system). By means of suitable transmission means, the movement of the controlling member is transmitted to the carburetor throttle, for example.
摘要翻译： 本发明涉及用于限制其控制量（例如转速）的二冲程发动机的控制系统。 为此，包括阀的压力管线连接到曲轴箱并且通向响应于机械或电信号（来自点火系统的振动或电脉冲）的气动控制构件。 通过适当的传动装置，控制构件的移动例如被传送到化油器节气门。
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2.发明授权Motor chain saw having a guide bar clamped between the housing and a clamping piece 失效电动链锯具有夹在壳体和夹紧件之间的导杆
公开(公告)号：US4999918A
公开(公告)日：1991-03-19
申请号：US448620
申请日：1989-12-11
摘要： The invention relates to a motor chain saw having a guide bar clamped between the housing and a clamping piece. The chain saw has a drive motor arranged in a housing and the drive motor drives a saw chain running on a guide bar. The guide bar is clamped to the housing at one end between the housing and a clamping piece with the clamping being transverse to the plane of the guide bar. For tensioning the saw chain, the guide bar is displaceable in the longitudinal direction thereof by means of a chain tensioning device when the clamping piece is loosened. If high forces act on the guide bar, then the latter slips toward the sprocket wheel in the longitudinal direction notwithstanding the fact that the guide bar is clamped to the housing. Accordingly, the saw chain must be again tensioned by means of the chain tensioning device. According to a feature of the invention, at least one of the surfaces between the end of the guide bar and the housing or between the clamping piece is treated to increase friction whereby higher forces can act on the clamping connection for the same clamping force without effecting a displacement of the guide bar. It then becomes unnecessary to retension the saw chain while working with the chain saw.
摘要翻译： 本发明涉及一种电动链锯，其具有夹在壳体和夹紧件之间的导杆。 链锯具有布置在壳体中的驱动马达，并且驱动马达驱动在引导杆上运行的锯链。 引导杆在壳体和夹紧件之间的一端被夹紧到壳体，夹紧件横向于导杆的平面。 为了张紧锯链，当夹紧件松动时，引导杆可以通过链条张紧装置在其纵向方向上移位。 如果高力作用在导杆上，则后者在纵向方向上朝向链轮滑动，尽管导向杆被夹紧到壳体。 因此，锯链必须再次通过链条张紧装置张紧。 根据本发明的特征，引导杆的端部与壳体之间或夹紧件之间的至少一个表面被处理以增加摩擦，由此较高的力可以在夹持连接上作用于相同的夹紧力而不影响 引导杆的位移。 在使用链锯的同时，不必再拉锯锯。
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公开(公告)号：US4594780A
公开(公告)日：1986-06-17
申请号：US628655
申请日：1984-07-06
申请人： Harald Schliemann , Michael Wissmann , Hans Nickel
发明人： Harald Schliemann , Michael Wissmann , Hans Nickel
CPC分类号： B27B17/083 , F16D59/00 , Y10T74/11
摘要： The invention is directed to a braking arrangement for a chain saw having a housing and a guide bar mounted on the housing for accommodating a saw chain thereon. The brake arrangement includes a brake drum operatively connected to the saw chain with a brake band disposed in surrounding relationship thereto. A brake member is connected to the brake band and moves between a ready position whereat the brake band is disposed in spaced relationship to the brake drum and a released position whereat the brake band is drawn tightly around the brake drum. A brake spring resiliently biases the brake member to cause the brake member to pull the brake band tightly about the brake drum when in the released position. A latch arrangement holds the brake member in the ready position against the force of the brake spring. A cam connected to the drive motor rotates through a predetermined path. A release device opens the latch arrangement to permit rotational movement of the brake member to the released position and releases a tensioning member for movement into the path of the cam when the brake member is in the second position whereat the tensioning member follows the cam in a movement that causes the tensioning member to again coact with the latch arrangement to return the brake member to the ready position and to reclose the latch arrangement whereby the latter again holds the brake member in the ready position against the force of the brake spring.
摘要翻译： 本发明涉及一种用于链锯的制动装置，其具有安装在壳体上的壳体和导杆，用于在其上容纳锯链。 制动装置包括操作地连接到锯链的制动鼓，制动带以与其周围的关系设置。 制动部件与制动带连接，并在制动带与制动鼓之间间隔设置的就绪位置和释放位置之间移动，制动带被紧紧地卷绕在制动鼓上。 制动弹簧弹性地偏置制动构件，以使制动构件在处于释放位置时将制动带紧紧地拉过制动鼓。 闩锁装置克服制动弹簧的力将制动构件保持在就绪位置。 连接到驱动马达的凸轮旋转预定的路径。 释放装置打开闩锁装置，以允许制动构件旋转移动到释放位置，并且当制动构件处于第二位置时释放用于移动到凸轮的路径中的张紧构件，其中张紧构件沿着凸轮在第二位置 使张紧构件再次与闩锁装置共同作用以将制动构件返回就绪位置并且重新闭合闩锁装置的运动，由此，闩锁装置再次将制动构件保持在准备位置以克服制动弹簧的力。
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公开(公告)号：US4696264A
公开(公告)日：1987-09-29
申请号：US764220
申请日：1985-08-09
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 。
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公开(公告)号：US4633843A
公开(公告)日：1987-01-06
申请号：US642757
申请日：1984-08-21
CPC分类号： F02M37/0023 , F02M17/04 , F02M37/007 , F02M37/0076 , F02B2075/025 , F02B63/02 , F02D33/006 , Y10T137/86316
摘要： The invention is directed to a carburetor arrangement for an internal combustion engine of a working tool such as a portable hand-held chain saw, a cutoff machine or the like and includes a tank from which the fuel is conducted to the main nozzle of a carburetor via an inlet valve of the carburetor. A tank pressure blocking valve is mounted in the fuel feed line between the tank and the nozzle. The valve body of the blocking valve is pressed tightly against its valve seat in the direction of fuel flow and pressure drop when the engine is at standstill. During starting and running of the engine, the valve body is lifted from its seat by the underpressure condition caused by the engine and is moved in a direction opposite to an overpressure in the tank and against the flow of fuel.
摘要翻译： 本发明涉及一种用于诸如便携式手持链锯，切割机等的工作工具的内燃机的化油器装置，并且包括燃料被引导到化油器的主喷嘴的罐 通过化油器的入口阀。 油箱压力阻塞阀安装在罐和喷嘴之间的燃料供给管线中。 当发动机处于停止状态时，阻塞阀的阀体在燃料流动和压降方向上紧紧地压靠其阀座。 在发动机的启动和运行期间，阀体由于由发动机引起的负压条件而从其座椅上抬起，并且在与罐中的超压相反的方向上移动并抵抗燃料流动。
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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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公开(公告)号：US4936267A
公开(公告)日：1990-06-26
申请号：US267847
申请日：1988-11-07
CPC分类号： F02M17/04 , F02M1/16 , Y10S261/08 , Y10S261/68
摘要： 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.
摘要翻译： 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。
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8.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：US4341192A
公开(公告)日：1982-07-27
申请号：US129496
申请日：1980-03-11
申请人： Heinrich Knapp , Wolfgang Maisch , Klaus-Jurgen Peters , Michael Wissmann , Gunther Jaggle , Peter Schelhas
发明人： Heinrich Knapp , Wolfgang Maisch , Klaus-Jurgen Peters , Michael Wissmann , Gunther Jaggle , Peter Schelhas
摘要： A fuel injection system is proposed which brings about an improvement in the acceleration behavior of an internal combustion engine. The fuel injection system includes metering valves actuatable by means of an air flow measuring device, at which valves a pressure difference can be held constant via control valves and the pressure difference is variable in accordance with operational characteristics of the engine. To this end, the control valves are located on a control pressure line in which a control throttle and an electromagnetic valve are disposed. At the same time, pressure limitation elements communicate with the control pressure line and, in the event of acceleration of the engine, reduce the extent of increase of control pressure and thus assure fuel metering corresponding with the operational state of the engine.
摘要翻译： 提出了一种燃料喷射系统，其引起内燃机的加速行为的改善。 燃料喷射系统包括可通过气流测量装置致动的计量阀，在该阀处通过控制阀将压力差保持不变，并且压力差根据发动机的操作特性是可变的。 为此，控制阀位于控制节流阀和电磁阀的控制压力管路上。 同时，压力限制元件与控制压力线通信，并且在发动机的加速的情况下减小控制压力的增加的程度，从而确保与发动机的操作状态对应的燃料计量。
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