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公开(公告)号：US4933584A
公开(公告)日：1990-06-12
申请号：US288474
申请日：1988-12-22
CPC分类号： H02K1/278 , H02K1/16 , H02K1/2786 , H02K29/12 , H02K2201/06
摘要： An electronically commutated motor has substantially constant air gap energy to reduce cogging. A rotatable assembly has permanent magnet elements which rotate about an axis of rotation. The elements are oriented with respect to said axis of rotation to provide a magnetic field with lines of flux along a plane forming a skew angle of s.sub.1 mechanical degrees with respect to the axis of rotation, wherein s.sub.1 is not equal to zero. The elements may be provided with an unmagnetized portion referred to as a phantom skew. A stationary assembly is in magnetic coupling relation with the permanent magnet elements of the rotatable assembly and has t spaced teeth with adjacent teeth defining a slot therebetween, wherein t is positive integer. Each tooth has a surface adjacent the rotatable assembly having one or more notches forming a skew angle of s.sub.2 mechanical degrees with the axis of rotation. Each tooth has winding stages adapted for commutation in at least one preselected sequence. The skewed magnetic field, skewed notches and phantom magnetic skews reduce cogging between the rotatable assembly and the stationary assembly as the rotatable assembly rotates, while maintaining a back EMF waveform having a maximized flat top width.
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2.发明授权Electronically commutated motor having an increased flat top width in its back EMF waveform, a rotatable assembly therefor, and methods of their operation 失效电动换向电动机在其反电动势波形中具有增加的平顶宽度，其可旋转组件及其操作方法
公开(公告)号：US4950960A
公开(公告)日：1990-08-21
申请号：US328674
申请日：1989-03-27
摘要： An electronically commutated motor is disclosed including a stationary assembly having a plurality of winding stages adapted for commutation in at least one preselected sequence and a rotatable assembly having a plurality of permanent magnet elements in magnetic coupling relation with the stationary assembly. The permanent magnet elements are adapated to sequentially apply a magnetic field having a substantially constantly increasing magnetic flux to each respective winding stage during the period that current is supplied to the respective winding stage as the rotatable assembly rotates. The permanent magnet elements are also adapted to sequentially apply a magnetic field having a substantially constantly decreasing magnetic flux to each respective winding stage during a period that current is not supplied to the respective winding stage as the rotatable assembly rotates. A rotatable assembly, a method of operating the motor, and a method of rotating the rotatable assembly are also disclosed.
摘要翻译： 公开了一种电子换向电动机，其包括固定组件，其具有适于在至少一个预选顺序中换向的多个绕组段和具有与固定组件磁耦合的多个永磁体元件的可旋转组件。 适应永久磁铁元件，以在可旋转组件旋转时将电流提供给相应的卷绕台阶期间，将具有基本恒定增加的磁通的磁场施加到每个相应的卷绕台。 永磁体元件还适于在可旋转组件旋转时不向各个卷绕台供给电流的周期期间将具有基本上恒定递减的磁通的磁场施加到每个相应的卷绕台。 还公开了可旋转组件，操作电动机的方法和旋转可旋转组件的方法。
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3.发明申请METHOD AND APPARATUS FOR CHARACTERIZING FUEL INJECTOR PERFORMANCE TO REDUCE VARIABILITY IN FUEL INJECTION 有权用于表征燃油喷射器性能降低燃油喷射变化的方法和装置公开(公告)号：US20100145597A1
公开(公告)日：2010-06-10
申请号：US12315767
申请日：2008-12-05
申请人： Kevin R. Keegan , Ronald J. Krefta
发明人： Kevin R. Keegan , Ronald J. Krefta
IPC分类号： F02D41/30
CPC分类号： F02D41/0085 , F02D41/20 , F02D41/2435 , F02D2041/2055 , F02D2041/2058
摘要： A method for equalizing fuel injector flows among a plurality of fuel injectors in an internal combustion engine including the steps of a) characterizing the electrical and/or mechanical performance of each fuel injector; b) imprinting characterization data on each fuel injector; c) reading the imprinted data into a control computer, preferably at the time of engine assembly or sub-assembly; and d) using the characterization data in an algorithm to adjust at least one electrical parameter such as hold current, peak current, and boost time for each fuel injector in an assembled engine during each fuel injection cycle.
摘要翻译： 一种用于均衡内燃机中的多个燃料喷射器之间的燃料喷射器流动的方法，包括以下步骤：a）表征每个燃料喷射器的电气和/或机械性能; b）在每个喷油器上刻印特征数据; c）优选地在发动机组装或子组装时将印刷的数据读取到控制计算机中; 以及d）在每个燃料喷射循环期间，使用算法中的表征数据来调整组装的发动机中的每个燃料喷射器的至少一个电参数，例如保持电流，峰值电流和升压时间。
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4.发明授权System and method for controlling an injection time of a fuel injector based on closing electrical decay 有权基于闭合电气衰减来控制燃料喷射器的喷射时间的系统和方法公开(公告)号：US08656890B2
公开(公告)日：2014-02-25
申请号：US13069862
申请日：2011-03-23
IPC分类号： F02M1/00
CPC分类号： F02D41/20 , F02D41/1401 , F02D2041/2027 , F02D2041/2055
摘要： A system and method for controlling an injection time of a fuel injector. The system includes a drive circuit configured to output a drive signal having a pulse width, wherein the injection time is influenced by the pulse width and a closing electrical decay of the fuel injector. A controller is configured to determine the closing electrical decay of the fuel injector and adapt the pulse width based on the closing electrical decay to control the injection time. The closing electrical decay includes a closing response. The controller determines the closing response based on an injector signal, such as a coil voltage of the fuel injector. By determining the closing response, the pulse width can be adjusted to compensate for fuel injector part-to-part variability, fuel injector wear, variations in fuel pressure received by the fuel injector, dirt in the fuel injector, and the like.
摘要翻译： 一种用于控制燃料喷射器的喷射时间的系统和方法。 该系统包括：驱动电路，被配置为输出具有脉冲宽度的驱动信号，其中喷射时间受燃料喷射器的脉冲宽度和闭合电衰减的影响。 控制器被配置为确定燃料喷射器的闭合电衰减，并且基于闭合电衰减来适应脉冲宽度以控制喷射时间。 关闭电气衰减包括关闭响应。 控制器基于诸如燃料喷射器的线圈电压的喷射器信号来确定关闭响应。 通过确定关闭响应，可以调整脉冲宽度以补偿燃料喷射器部件间变化，燃料喷射器磨损，燃料喷射器接收的燃料压力变化，燃料喷射器中的污垢等。
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5.发明授权Method and apparatus for characterizing fuel injector performance to reduce variability in fuel injection 有权用于表征燃料喷射器性能以减少燃料喷射的可变性的方法和装置公开(公告)号：US07945374B2
公开(公告)日：2011-05-17
申请号：US12315767
申请日：2008-12-05
申请人： Kevin R. Keegan , Ronald J. Krefta
发明人： Kevin R. Keegan , Ronald J. Krefta
IPC分类号： F02D41/30
CPC分类号： F02D41/0085 , F02D41/20 , F02D41/2435 , F02D2041/2055 , F02D2041/2058
摘要： A method for equalizing fuel injector flows among a plurality of fuel injectors in an internal combustion engine including the steps of a) characterizing the electrical and/or mechanical performance of each fuel injector; b) imprinting characterization data on each fuel injector; c) reading the imprinted data into a control computer, preferably at the time of engine assembly or sub-assembly; and d) using the characterization data in an algorithm to adjust at least one electrical parameter such as hold current, peak current, and boost time for each fuel injector in an assembled engine during each fuel injection cycle.
摘要翻译： 一种用于均衡内燃机中的多个燃料喷射器之间的燃料喷射器流动的方法，包括以下步骤：a）表征每个燃料喷射器的电气和/或机械性能; b）在每个喷油器上刻印特征数据; c）优选地在发动机组装或子组装时将印刷数据读入控制计算机; 以及d）在每个燃料喷射循环期间，使用算法中的表征数据来调整组装的发动机中的每个燃料喷射器的至少一个电参数，例如保持电流，峰值电流和升压时间。
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6.发明授权Multiphase electrical motor, control and method using overlapping conduction periods in the windings 失效多相电机，绕组中使用重叠导通周期的控制和方法
公开(公告)号：US5821722A
公开(公告)日：1998-10-13
申请号：US466579
申请日：1995-06-06
CPC分类号： H02P6/08
摘要： A motor has a stationary assembly including three windings in magnetic coupling relation to a rotatable assembly, the position of which is sensed by a position sensor. A converter, adapted to be coupled to a power supply, energizes each of the windings with a voltage. The converter is responsive to the angular position and speed of the rotatable assembly for selectively energizing each of the windings according to a preselected sequence. The converter energizes each winding with the voltage throughout a commutation period when a back EMF induced in such winding has a polarity opposite to a polarity of the voltage energizing such winding, the commutation period for each winding overlapping the commutation period for another winding. Alternatively, the converter energizes each winding with the voltage throughout a commutation period of 180 electrical degrees, the commutation period for each winding overlapping the commutation period for another winding. As a result, torque ripple in the rotation of the rotatable assembly is reduced.
摘要翻译： 电动机具有固定组件，其包括与可旋转组件的磁耦合关系的三个绕组，其位置由位置传感器感测。 适于耦合到电源的A转换器以电压为每个绕组供电。 转换器响应于可旋转组件的角位置和速度，以根据预选序列选择性地给每个绕组供电。 当在这种绕组中感应的反电动势具有与向这样的绕组通电的电压的极性相反的极性时，转换器在整个换向周期期间以每个绕组的电压激励电压，其中每个绕组的换向周期与另一个绕组的换向周期重叠。 或者，转换器在整个180度的整流周期内使每个绕组的电压通电，每个绕组的换向周期与另一个绕组的换向周期重叠。 结果，可旋转组件的旋转中的转矩波动减小。
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