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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：US20180045131A1
公开(公告)日：2018-02-15
申请号：US15233398
申请日：2016-08-10
申请人： Brian Rockwell
发明人： Brian Rockwell
CPC分类号： F02D41/1401 , F02D35/028 , F02D41/009 , F02D41/248 , F02D41/263 , F02D2041/1412 , F02D2041/1433 , F02D2250/26 , F02P5/1502 , F02P5/1504 , F02P5/1514 , F02P5/153 , Y02T10/46
摘要： A control system includes an ignition system configured to generate spark within a cylinder of an engine and a controller. The controller is configured to obtain a target angle of the crankshaft for an approximately 50% mass fraction burn (MFB50) and predict an ignition angle to achieve the target MFB50 angle, the ignition angle indicating an advance or retardation of spark timing. Using a combustion model, the controller is configured to generate a modeled MFB50 angle based on the predicted ignition angle and, based on the target and modeled MFB50 angles and the predicted ignition angle, determine a relationship between MFB50 angle and ignition angle. The controller is also configured to control the ignition system using the determined relationship.
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