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公开(公告)号：US20160305312A1
公开(公告)日：2016-10-20
申请号：US14686278
申请日：2015-04-14
申请人： Ayman Ismail , Brian Rockwell , John R. Bucknell , Ethan E. Bayer
发明人： Ayman Ismail , Brian Rockwell , John R. Bucknell , Ethan E. Bayer
CPC分类号： F02B37/183 , F02D41/0007 , F02D41/2464 , F02D2041/141 , F02D2041/2027 , F02D2250/16 , Y02T10/144
摘要： Techniques for learning endstop position(s) of an actuator for a wastegate valve include detecting a learn condition and, in response to detecting the learn condition, performing a learn procedure for the actuator endstop position(s). The learn procedure includes commanding the actuator to a desired position past the endstop position corresponding to a fully-closed wastegate valve while rate-limiting a velocity of the actuator. When the difference reaches its maximum allowed value and the velocity falls below a fraction of its rate limit, the endstop position is learned. When the wastegate valve is requested open, the actuator is then controlled using the learned endstop position. Reference stiffness for a fully-closed wastegate valve could be obtained, and subsequent stiffness checks could then be periodically performed and, if less than the reference stiffness, a duty cycle of the actuator could be increased during open-loop control.
摘要翻译： 用于学习用于废气门阀的致动器的止挡位置的技术包括检测学习状况，并且响应于检测到学习条件，执行致动器止挡位置的学习过程。 学习过程包括将速度限制致动器速度的速度限制在致动器的指令位置，超过对应于完全关闭的废气门阀的终止位置。 当差值达到其最大允许值并且速度低于其速率限制的一小部分时，将学习终止位置。 当废气阀被要求打开时，然后使用学习的止挡位置来控制致动器。 可以获得完全关闭的废气门阀的参考刚度，然后可以周期性地进行随后的刚度检查，并且如果小于参考刚度，则可以在开环控制期间增加致动器的占空比。
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公开(公告)号：US10138802B2
公开(公告)日：2018-11-27
申请号：US14686278
申请日：2015-04-14
申请人： Ayman Ismail , Brian Rockwell , John R Bucknell , Ethan E Bayer
发明人： Ayman Ismail , Brian Rockwell , John R Bucknell , Ethan E Bayer
摘要： Techniques for learning endstop position(s) of an actuator for a wastegate valve include detecting a learn condition and, in response to detecting the learn condition, performing a learn procedure for the actuator endstop position(s). The learn procedure includes commanding the actuator to a desired position past the endstop position corresponding to a fully-closed wastegate valve while rate-limiting a velocity of the actuator. When the difference reaches its maximum allowed value and the velocity falls below a fraction of its rate limit, the endstop position is learned. When the wastegate valve is requested open, the actuator is then controlled using the learned endstop position. Reference stiffness for a fully-closed wastegate valve could be obtained, and subsequent stiffness checks could then be periodically performed and, if less than the reference stiffness, a duty cycle of the actuator could be increased during open-loop control.
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公开(公告)号：US09541018B2
公开(公告)日：2017-01-10
申请号：US14851033
申请日：2015-09-11
申请人： Ethan E Bayer , Ayman Ismail , David A Lawrence
发明人： Ethan E Bayer , Ayman Ismail , David A Lawrence
CPC分类号： F02D41/0082 , F01L1/34 , F01L2013/111 , F01L2800/11 , F01L2820/041 , F01L2820/042 , F02B75/22 , F02D13/0226 , F02D13/0238 , F02D41/0085 , F02D41/1405 , F02D41/1443 , F02D41/1454 , F02D41/2451 , F02D41/2454 , F02D2041/001 , F02D2200/0411 , Y02T10/18
摘要： An engine bank-to-bank airflow balancing technique includes calculating current and offset volumetric efficiencies of the engine and calculating a slope representing (i) a difference between the offset and current volumetric efficiencies and (ii) a difference between offset and current intake camshaft positions. Based on the respective exhaust gas oxygen concentrations, the technique involves calculating a volumetric efficiency correction corresponding to each cylinder bank and based on the slope and the volumetric efficiency corrections, calculating target intake camshaft position shifts. The technique further involves controlling offsets of the intake camshafts based on the target intake camshaft position shifts. After a predetermined number of target intake camshaft position shifts are determined and stored with respect to various combinations of engine speed and a ratio of intake manifold pressure to barometric pressure, final intake camshaft position shifts may be determined and utilized when determining the intake camshaft positions.
摘要翻译： 发动机库对空气流平衡技术包括计算发动机的当前和偏移体积效率并计算斜率，其表示（i）偏移和当前体积效率之间的差异，以及（ii）偏置和当前进气凸轮轴位置之间的差异 。 基于相应的废气氧浓度，该技术涉及计算对应于每个气缸组的体积效率校正，并且基于斜率和体积效率校正，计算目标进气凸轮轴位置偏移。 该技术还包括基于目标进气凸轮轴位置偏移来控制进气凸轮轴的偏移。 在相对于发动机转速和进气歧管压力与大气压力的比例的各种组合来确定和存储预定数量的目标进气凸轮轴位置偏移之后，可以在确定进气凸轮轴位置时确定和利用最终进气凸轮轴位置偏移。
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公开(公告)号：US20160076471A1
公开(公告)日：2016-03-17
申请号：US14851033
申请日：2015-09-11
申请人： Ethan E. Bayer , Ayman Ismail , David A. Lawrence
发明人： Ethan E. Bayer , Ayman Ismail , David A. Lawrence
CPC分类号： F02D41/0082 , F01L1/34 , F01L2013/111 , F01L2800/11 , F01L2820/041 , F01L2820/042 , F02B75/22 , F02D13/0226 , F02D13/0238 , F02D41/0085 , F02D41/1405 , F02D41/1443 , F02D41/1454 , F02D41/2451 , F02D41/2454 , F02D2041/001 , F02D2200/0411 , Y02T10/18
摘要： An engine bank-to-bank airflow balancing technique includes calculating current and offset volumetric efficiencies of the engine and calculating a slope representing (i) a difference between the offset and current volumetric efficiencies and (ii) a difference between offset and current intake camshaft positions. Based on the respective exhaust gas oxygen concentrations, the technique involves calculating a volumetric efficiency correction corresponding to each cylinder bank and based on the slope and the volumetric efficiency corrections, calculating target intake camshaft position shifts. The technique further involves controlling offsets of the intake camshafts based on the target intake camshaft position shifts. After a predetermined number of target intake camshaft position shifts are determined and stored with respect to various combinations of engine speed and a ratio of intake manifold pressure to barometric pressure, final intake camshaft position shifts may be determined and utilized when determining the intake camshaft positions.
摘要翻译： 发动机库对空气流平衡技术包括计算发动机的当前和偏移体积效率并计算斜率，其表示（i）偏移和当前体积效率之间的差异，以及（ii）偏置和当前进气凸轮轴位置之间的差异 。 基于相应的废气氧浓度，该技术涉及计算对应于每个气缸组的体积效率校正，并且基于斜率和体积效率校正，计算目标进气凸轮轴位置偏移。 该技术还涉及基于目标进气凸轮轴位置偏移来控制进气凸轮轴的偏移。 在相对于发动机转速和进气歧管压力与大气压力的比例的各种组合来确定和存储预定数量的目标进气凸轮轴位置偏移之后，可以在确定进气凸轮轴位置时确定和利用最终进气凸轮轴位置偏移。
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公开(公告)号：US20120235724A1
公开(公告)日：2012-09-20
申请号：US13231758
申请日：2011-09-13
申请人： Ahmed Mokhtar , Ahmed Elmallah , Ahmed Elshennawy , Ahmed Shaban , Botros George , Mostafa Elmala , Ayman Ismail , Mostafa Sakr , Ayman Elsayed
发明人： Ahmed Mokhtar , Ahmed Elmallah , Ahmed Elshennawy , Ahmed Shaban , Botros George , Mostafa Elmala , Ayman Ismail , Mostafa Sakr , Ayman Elsayed
IPC分类号： H03H11/26
CPC分类号： G01C19/5776 , G01P15/125
摘要： In a high-performance interface circuit for micro-electromechanical (MEMS) inertial sensors, an excitation signal (used to detect capacitance variation) is used to control the value of an actuation signal bit stream to allow the dynamic range of both actuation and detection paths to be maximized and to prevent folding of high frequency components of the actuation bit stream due to mixing with the excitation signal. In another aspect, the effects of coupling between actuation signals and detection signals may be overcome by performing a disable/reset of at least one of and preferably both of the detection circuitry and the MEMS detection electrodes during actuation signal transitions. In a still further aspect, to get a demodulated signal to have a low DC component, fine phase adjustment may be achieved by configuring filters within the sense and drive paths to have slightly different center frequencies and hence slightly different delays.
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公开(公告)号：US20120235725A1
公开(公告)日：2012-09-20
申请号：US13231602
申请日：2011-09-13
申请人： Ahmed Elmallah , Ahmed Elshennawy , Ahmed Shaban , Botros George , Mostafa Elmala , Ayman Ismail , Mostafa Sakr , Ahmed Mokhtar , Ayman Elsayed
发明人： Ahmed Elmallah , Ahmed Elshennawy , Ahmed Shaban , Botros George , Mostafa Elmala , Ayman Ismail , Mostafa Sakr , Ahmed Mokhtar , Ayman Elsayed
IPC分类号： H03K3/00
CPC分类号： G01C19/5776 , G01P15/125
摘要： In a high-performance interface circuit for micro-electromechanical (MEMS) inertial sensors, an excitation signal (used to detect capacitance variation) is used to control the value of an actuation signal bit stream to allow the dynamic range of both actuation and detection paths to be maximized and to prevent folding of high frequency components of the actuation bit stream due to mixing with the excitation signal. In another aspect, the effects of coupling between actuation signals and detection signals may be overcome by performing a disable/reset of at least one of and preferably both of the detection circuitry and the MEMS detection electrodes during actuation signal transitions. In a still further aspect, to get a demodulated signal to have a low DC component, fine phase adjustment may be achieved by configuring filters within the sense and drive paths to have slightly different center frequencies and hence slightly different delays.
摘要翻译： 在用于微机电（MEMS）惯性传感器的高性能接口电路中，使用激励信号（用于检测电容变化）来控制致动信号位流的值，以允许致动和检测路径的动态范围 最大化并且防止由于与激励信号的混合而使致动位流的高频分量折叠。 在另一方面，可以通过在致动信号转换期间执行检测电路和MEMS检测电极中的至少一个并且优选地两者的禁用/复位来克服致动信号和检测信号之间的耦合的影响。 在另一方面，为了获得具有低DC分量的解调信号，可以通过在感测和驱动路径内配置滤波器来具有略微不同的中心频率并因此实现略微不同的延迟来实现精细相位调整。
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公开(公告)号：US09013233B2
公开(公告)日：2015-04-21
申请号：US13231602
申请日：2011-09-13
申请人： Ahmed Elmallah , Ahmed Elshennawy , Ahmed Shaban , Botros George , Mostafa Elmala , Ayman Ismail , Mostafa Sakr , Ahmed Mokhtar , Ayman Elsayed
发明人： Ahmed Elmallah , Ahmed Elshennawy , Ahmed Shaban , Botros George , Mostafa Elmala , Ayman Ismail , Mostafa Sakr , Ahmed Mokhtar , Ayman Elsayed
IPC分类号： H03B1/00 , H03K5/00 , H04B1/10 , G01C19/5776 , G01P15/125
CPC分类号： G01C19/5776 , G01P15/125
摘要： In a high-performance interface circuit for micro-electromechanical (MEMS) inertial sensors, an excitation signal (used to detect capacitance variation) is used to control the value of an actuation signal bit stream to allow the dynamic range of both actuation and detection paths to be maximized and to prevent folding of high frequency components of the actuation bit stream due to mixing with the excitation signal. In another aspect, the effects of coupling between actuation signals and detection signals may be overcome by performing a disable/reset of at least one of and preferably both of the detection circuitry and the MEMS detection electrodes during actuation signal transitions. In a still further aspect, to get a demodulated signal to have a low DC component, fine phase adjustment may be achieved by configuring filters within the sense and drive paths to have slightly different center frequencies and hence slightly different delays.
摘要翻译： 在用于微机电（MEMS）惯性传感器的高性能接口电路中，使用激励信号（用于检测电容变化）来控制致动信号位流的值，以允许致动和检测路径的动态范围 最大化并且防止由于与激励信号的混合而使致动位流的高频分量折叠。 在另一方面，可以通过在致动信号转换期间执行检测电路和MEMS检测电极中的至少一个并且优选地两者的禁用/复位来克服致动信号和检测信号之间的耦合的影响。 在另一方面，为了获得具有低DC分量的解调信号，可以通过在感测和驱动路径内配置滤波器来具有略微不同的中心频率并因此实现略微不同的延迟来实现精细相位调整。
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公开(公告)号：US08508290B2
公开(公告)日：2013-08-13
申请号：US13231731
申请日：2011-09-13
申请人： Ayman Elsayed , Ahmed Elmallah , Ahmed Elshennawy , Ahmed Shaban , Botros George , Mostafa Elmala , Ayman Ismail , Mostafa Sakr , Ahmed Mokhtar
发明人： Ayman Elsayed , Ahmed Elmallah , Ahmed Elshennawy , Ahmed Shaban , Botros George , Mostafa Elmala , Ayman Ismail , Mostafa Sakr , Ahmed Mokhtar
CPC分类号： G01C19/5776 , G01P15/125
摘要： In a high-performance interface circuit for micro-electromechanical (MEMS) inertial sensors, an excitation signal (used to detect capacitance variation) is used to control the value of an actuation signal bit stream to allow the dynamic range of both actuation and detection paths to be maximized and to prevent folding of high frequency components of the actuation bit stream due to mixing with the excitation signal. In another aspect, the effects of coupling between actuation signals and detection signals may be overcome by performing a disable/reset of at least one of and preferably both of the detection circuitry and the MEMS detection electrodes during actuation signal transitions. In a still further aspect, to get a demodulated signal to have a low DC component, fine phase adjustment may be achieved by configuring filters within the sense and drive paths to have slightly different center frequencies and hence slightly different delays.
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公开(公告)号：US08476970B2
公开(公告)日：2013-07-02
申请号：US13231758
申请日：2011-09-13
申请人： Ahmed Mokhtar , Ahmed Elmallah , Ahmed Elshennawy , Ahmed Shaban , Botros George , Mostafa Elmala , Ayman Ismail , Mostafa Sakr , Ayman Elsayed
发明人： Ahmed Mokhtar , Ahmed Elmallah , Ahmed Elshennawy , Ahmed Shaban , Botros George , Mostafa Elmala , Ayman Ismail , Mostafa Sakr , Ayman Elsayed
CPC分类号： G01C19/5776 , G01P15/125
摘要： In a high-performance interface circuit for micro-electromechanical (MEMS) inertial sensors, an excitation signal (used to detect capacitance variation) is used to control the value of an actuation signal bit stream to allow the dynamic range of both actuation and detection paths to be maximized and to prevent folding of high frequency components of the actuation bit stream due to mixing with the excitation signal. In another aspect, the effects of coupling between actuation signals and detection signals may be overcome by performing a disable/reset of at least one of and preferably both of the detection circuitry and the MEMS detection electrodes during actuation signal transitions. In a still further aspect, to get a demodulated signal to have a low DC component, fine phase adjustment may be achieved by configuring filters within the sense and drive paths to have slightly different center frequencies and hence slightly different delays.
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