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公开(公告)号：EP0689035B1
公开(公告)日：1999-11-03
申请号：EP95201068.4
申请日：1995-04-26
CPC分类号： G01D5/147 , G01B7/30 , G01D5/2497
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公开(公告)号：EP0781979A3
公开(公告)日：1999-06-09
申请号：EP96203328.8
申请日：1996-11-26
IPC分类号： G01D5/16
CPC分类号： G01D5/147
摘要： A rotation sensor for high accuracy angle applications such as internal combustion engine crankshaft position sensing includes a pair of complementary target wheels (25A,25B) and a dual-element magnetoresistive sensor (11). The target wheels (25A,25B) are paced from one another along the rotational axis (Ar) by a predetermined distance (L). The individual magnetoresistive elements (MR1,MR2) are similarly spaced one from the other (2d) and are influenced by the ferrite effects of the target wheels. The spacing of the target wheels and magnetoresistive elements are selected in relation to one another and in relation to the amount of axial play in the crankshaft such that changes in ferrite effects of the target wheels upon the elements due to axial displacement (Δ) of the crankshaft have minimal effect on the accuracy of the sensing apparatus.
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公开(公告)号：EP0825420A1
公开(公告)日：1998-02-25
申请号：EP97202314.7
申请日：1997-07-24
发明人： Schroeder, Thaddeus , Butler, Raymond O.,Jr. , Lequesne, Bruno Patrice Bernard , Marks, Anthony Leo
CPC分类号： G01D5/2497 , G01D5/2492 , H03M1/0685 , H03M1/28
摘要： A rotation sensor includes a binary encoded target wheel (10) and a pair of sensors (20,30) disposed about the target wheel periphery. One of the sensors (20) provides a signal (V out1 ) indicative of the passage of regular angular intervals (60-63) of the target wheel (10) and the other of the sensors (30) provides binary states (V out2 ) corresponding to the regular angular intervals (60-63).
摘要翻译： 旋转传感器包括二进制编码目标轮（10）和围绕目标轮周边设置的一对传感器（20,30）。 传感器（20）中的一个提供指示目标轮（10）的规则角度间隔（60-63）的通过的信号（Vout1），并且传感器（30）中的另一个提供对应于 规则角度间隔（60-63）。
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公开(公告)号：EP0780663A1
公开(公告)日：1997-06-25
申请号：EP96203314.8
申请日：1996-11-25
CPC分类号： G01D5/145 , F02P7/0675
摘要： A rotation sensor has a target wheel (20) including first and second tracks (20A,20B) and a dual-element magnetoresistive sensor (10). Each individual magnetoresistive element (19A,19B) is aligned with a respective track (20A,20B) of the target wheel (20) to provide substantially inverse resistive changes with the passage of the wheel. One of the tracks (20A) is characterized by alternating high and low permeability, such as by a toothed section, and the other of the tracks (20B) is characterized by invariant permeability.
摘要翻译： 旋转传感器具有包括第一和第二轨道（20A，20B）的目标轮（20）和双元件磁阻传感器（10）。 每个单独的磁阻元件（19A，19B）与目标轮（20）的相应轨道（20A，20B）对准，以随着车轮的通过而提供基本上的反电阻变化。 轨道（20A）之一的特征在于交替的高，低磁导率，例如通过齿形部分，并且轨道（20B）中的另一个的特征在于不变的磁导率。
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5.发明公开Method and apparatus for detecting crankshaft angular position 失效Verfahren und Vorrichtung zur Detektion der Winkellage einer Kurbelwell。
公开(公告)号：EP0685707A1
公开(公告)日：1995-12-06
申请号：EP95201069.2
申请日：1995-04-26
发明人： Schroeder, Thaddeus , Butler, Raymond Ora, Jr. , Lesquesne, Bruno Patrice Bernard , Marks, Anthony Leo , Perry, Thomas Arthur , Bradley, John Robert
CPC分类号： G01D5/2497 , G01B7/30 , G01D5/147
摘要： A method and apparatus for detecting an engine crankshaft angular position which provides for fast starting of the engine. A target wheel (10) and sensor (24 and 26) combination generate an analog signal which is converted into a 24 bit digital output which repeats every 360° rotation of the crankshaft. Each bit represents a particular angular position of the crankshaft. Any 6 sequential bits in the repeating 24 bit digital output sequence form a unique pattern. By monitoring the first six bits generated (90° of crankshaft rotation) during start-up, a crankshaft angular position can be determined, thereby enabling fast starting of the engine.
摘要翻译： 用于检测发动机曲轴角位置的方法和装置，其提供发动机的快速启动。 目标轮（10）和传感器（24和26）组合产生模拟信号，该模拟信号被转换成24位数字输出，其重复曲轴每360度的旋转。 每个位表示曲轴的特定角度位置。 重复的24位数字输出序列中的任何6个连续位形成独特的模式。 通过监视启动时产生的前六位（曲轴旋转90°），可以确定曲轴角度位置，从而能够快速启动发动机。
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6.发明公开Thermomagnetically-patterned magnets and method of making same 失效Thermomagnetisch gestaltete Magnete und Verfahren zu ihrer Herstellung。
公开(公告)号：EP0480489A2
公开(公告)日：1992-04-15
申请号：EP91202270.4
申请日：1991-09-05
CPC分类号： G06K1/125 , Y10T428/31993
摘要： A permanent magnet (10) is heated in a pattern by a laser beam (18) to a localized temperature above the Curie point therof or a temperature sufficient to reduce the magnet coercivity thereof sufficiently for the field of the magnet (16') or an external field to re-magnetize the pattern in the reverse direction. Magnets so produced can have very high pole densities, digital encoding and analog patterns having gradually varying local magnetic field strengths.
摘要翻译： 永磁体（10）通过激光束（18）以图案加热到高于居里点的局部温度，或足以将磁体矫顽磁力充分降低到磁体（16'）的磁场或 外场反向重新磁化图案。 如此制造的磁体可以具有非常高的极点密度，数字编码和具有逐渐变化的局部磁场强度的模拟图案。
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7.发明公开Method and apparatus for electrically driving engine valves 失效Verfahren und Vorrichtung zum elektrischen Ventilantrieb bei Brennkraftmaschinen。
公开(公告)号：EP0603929A1
公开(公告)日：1994-06-29
申请号：EP93203418.4
申请日：1993-12-06
发明人： Schroeder, Thaddeus , Lequesne, Bruno Patrice Bernard , Henry, Rassem Ragheb , Murty, Balarama Vempaty
CPC分类号： F01L9/04 , F01L1/30 , F01L13/0005 , F01L2009/0411
摘要： Each valve (18) of an internal combustion engine is driven by a separate rotary electric motor (10). The valves are preferably either rotary valves, driven directly, or poppet valves (18), driven through a cam (16). Each motor (10) may run at half the engine speed to open and close a valve (18) at a basic profile during each engine cycle. Valve operation is shaped to engine conditions by slowing the motor speed in the valve-open period to increase the valve-open period, or increasing the motor speed in the valve-open period to decrease the valve-open period. The motor speed is oppositely controlled when the valve is closed to compensate for phase changes of the motor (10) relative to the engine. Valve phase as well as opening and closing velocity of the valve (18) are controlled by motor speed. A cam mechanism (16) for poppet valves (18) comprises a cylindrical cam (24) in line with the motor axis (20) and the valve stem (21), the mechanism (16) having inner and outer cylinders (24,30), one cylinder (24) rotating with the motor (10) and carrying a cam (36) and the other containing a cam follower (42) and reciprocating with the valve (18). A motor control includes position transducers for generating crankshaft position and motor position pulse trains. The pulse trains are compared to detect any phase difference between engine and motor (10). Tables are generated to define the desired phase difference needed for particular valve characteristics. The phase difference represents the instantaneous deviation from the basic profile. One of the tables is selected according to the engine conditions and the motor (10) is driven to achieve the desired phase differences.
摘要翻译： 内燃机的每个阀门（18）由单独的旋转电动机（10）驱动。 阀优选地是旋转阀，直接驱动或通过凸轮（16）驱动的提升阀（18）。 每个发动机循环期间，每个马达（10）可以以一半的发动机速度运行，以基本轮廓打开和关闭阀（18）。 阀门操作通过在阀门打开期间减慢电机速度来增加阀门打开时间，或增加阀门打开期间的电机速度以减少阀门打开时间，形成发动机状态。 当阀门关闭时，马达速度被相反地控制，以补偿马达（10）相对于发动机的相位变化。 阀门的相位以及阀门（18）的打开和关闭速度由电机速度控制。 一种用于提升阀（18）的凸轮机构（16）包括与马达轴线（20）和阀杆（21）成直角的圆柱形凸轮（24），该机构（16）具有内圆柱体和外圆柱体（24,30 ），与电机（10）一起旋转并承载凸轮（36）的一个气缸（24），另一个容纳凸轮从动件（42）并与阀门（18）往复运动。 电动机控制器包括用于产生曲轴位置和电动机位置脉冲串的位置传感器。 比较脉冲串以检测发动机和电动机之间的任何相位差（10）。 生成表以定义特定阀特性所需的期望相位差。 相位差表示与基本曲线的瞬时偏差。 根据发动机条件选择其中一个表，并且驱动马达（10）以实现期望的相位差。
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8.发明授权
公开(公告)号：EP0410583B1
公开(公告)日：1993-09-01
申请号：EP90307054.8
申请日：1990-06-28
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公开(公告)号：EP0480489A3
公开(公告)日：1992-10-07
申请号：EP91202270.4
申请日：1991-09-05
CPC分类号： G06K1/125 , Y10T428/31993
摘要： A permanent magnet (10) is heated in a pattern by a laser beam (18) to a localized temperature above the Curie point therof or a temperature sufficient to reduce the magnet coercivity thereof sufficiently for the field of the magnet (16') or an external field to re-magnetize the pattern in the reverse direction. Magnets so produced can have very high pole densities, digital encoding and analog patterns having gradually varying local magnetic field strengths.
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10.发明公开Method of making a permanent magnet sensor element with a soft magnetic layer 失效一种用于与软磁性层产生的永久磁传感器元件的方法。
公开(公告)号：EP0415576A1
公开(公告)日：1991-03-06
申请号：EP90308620.5
申请日：1990-08-06
CPC分类号： G01D5/147 , G01B7/003 , Y10T29/4902
摘要： A position sensor (10) is made by assembling a permanent magnet (14), a soft magnetic layer (16) on the magnet (14), a magnetoresistive sensor element (18) on the soft magnetic layer (16), and a toothed ferritic member (20) mounted for movement past the sensor element (18). The permanent magnet (14) is surface-treated to form, in situ, the soft magnetic layer (16) comprising a thin layer of high-permeability, low-coercivity material. An Nd-Fe-B alloy magnet (14) is surface-treated by a laser or electron beam to melt a thin layer (16) which is then cooled to re-solidify into a soft magnetic material. Rapid cooling achieves an amorphous surface layer having the desired properties. Slow cooling results in the formation of alpha-iron grains which enhance the soft magnetic properties. Iron formation is aided by reacting the molten layer with an oxidizing atmosphere. Iron alloying by adding iron powder to the molten layer is also feasible.
摘要翻译： 位置传感器（10），是通过组装在磁体的永磁体（14），一软磁性层（16）（14），所述软磁性层（16）上的磁阻传感器元件（18），和一个带齿制成 安装用于经过所述传感器元件（18）移动的铁素体部件（20）。 所述永磁体（14）进行表面处理，以形成，原位，软磁性层（16）包括高磁导率，低矫顽力材料构成的薄层。 的Nd-Fe-B合金磁体（14）是表面处理过的通过激光或电子束熔化的薄层（16），然后将其冷却至再固化成软磁性材料。 快速冷却以达到对具有期望性质的无定形表面层。 缓慢冷却的结果中的α-铁颗粒，其增强的软磁特性的形成。 铁形成是通过使用在氧化性气氛中熔融层辅助。 所以铁的合金中加入铁粉到熔融层是可行的。
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