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1. 发明授权

US10584648B2 Control device and control method for variable valve timing mechanism 有权
公开(公告)号：US10584648B2
公开(公告)日：2020-03-10
申请号：US16332414
申请日：2018-01-19
申请人： Hitachi Automotive Systems, Ltd.
发明人： Kentaro Mikawa , Nobuhiko Matsuo , Naoki Okamoto
IPC分类号： F02D13/02 , F01L1/352 , F01L1/356 , F01L1/344
摘要： In a control device and a control method for a variable valve timing mechanism according to the present invention, the rotational phase of a camshaft is measured based on the cam angle signal and crank angle signal upon receiving each pulse of the cam angle signal, and the rotational phase change over time within a period of the cam angle signal is measured based on the motor angle signal. It is decided whether the cam angle signal and/or crank angle signal has a prescribed pulse pattern at a diagnostic timing that comes after the last pulse of the cam angle signal. When this decision result is positive, it is then decided whether the motor angle sensor operates normally or abnormally based on the rotational phase and the amount of rotational phase change that are measured when the last pulse of the cam angle signal is received before the diagnostic timing.

2. 发明授权

US09410488B2 Variable valve timing control device for internal combustion engine, and control method 有权
标题翻译：内燃机可变气门正时控制装置及控制方法
公开(公告)号：US09410488B2
公开(公告)日：2016-08-09
申请号：US14432284
申请日：2014-03-07
申请人： Hitachi Automotive Systems, Ltd.
发明人： Kentaro Mikawa
IPC分类号： F02D13/02 , F02D41/00
CPC分类号： F02D13/0203 , F01L1/34 , F01L2800/00 , F02D13/02 , F02D13/0215 , F02D13/0234 , F02D13/0249 , F02D41/1401 , F02D2041/001 , F02D2041/1409 , F02D2200/503 , F02D2200/70 , Y02T10/18
摘要： The present invention relates to variable valve timing control device and control method, which change valve timing of an internal combustion engine. An operation amount for controlling the valve timing is computed, and an operation amount computed at position detection timing of a valve timing control system is divided and output until next position detection timing.
摘要翻译：本发明涉及改变内燃机的气门正时的可变气门正时控制装置和控制方法。计算用于控制气门正时的操作量，并且将在气门正时控制系统的位置检测定时计算出的操作量分配并输出直到下一个位置检测定时。

3. 发明授权

US10767552B2 Control apparatus and control method for variable valve timing mechanism 有权
公开(公告)号：US10767552B2
公开(公告)日：2020-09-08
申请号：US15580828
申请日：2016-06-16
申请人： HITACHI AUTOMOTIVE SYSTEMS, LTD.
发明人： Kentaro Mikawa
IPC分类号： F02B33/18 , F02D13/02 , F01L1/344 , F02D41/00 , F02D41/06 , F01L1/053
摘要： The present invention has: a crank angle sensor 4 that outputs a crank angle signal in response to rotation of a crankshaft 2, the crank angle signal being preset to indicate reference positions; a cam sensor 5 that outputs cam signal pulses in response to rotation of an intake camshaft 3 for opening and closing an engine valve; an electric motor 6 that relatively rotates intake camshaft 3 with respect to crankshaft 2, so that electric motor 6 can change a rotational phase angle of intake camshaft 3 with respect to crankshaft 2; and an electronic control unit 7 that computes an actual rotational phase angle of intake camshaft 3 based on a first cam signal pulse detected after start of cranking and a first reference position of the crank signal detected thereafter, to calculate an absolute position of a variable valve timing mechanism 14.

4. 发明授权

US09145796B2 Control unit for variable valve timing mechanism and control method for variable valve timing mechanism 有权
标题翻译：可变气门正时机构控制单元及可变气门正时机构的控制方法
公开(公告)号：US09145796B2
公开(公告)日：2015-09-29
申请号：US13845895
申请日：2013-03-18
申请人： HITACHI AUTOMOTIVE SYSTEMS, LTD.
发明人： Kentaro Mikawa
IPC分类号： F01L1/34 , F02D13/00 , F02D41/04 , F02D41/06 , F02N19/00 , F02D35/00 , F02D41/00
CPC分类号： F01L1/34 , F01L2800/01 , F01L2820/032 , F02D13/00 , F02D13/0238 , F02D35/0007 , F02D41/042 , F02D41/062 , F02D2041/001 , F02N19/004 , Y02T10/18
摘要： A control unit for a variable valve timing mechanism for changing a cam phase by an actuator corrects the operation amount of the actuator immediately after an engine is started based on at least an engine rotation angle and a cam phase angle in an engine stop state.
摘要翻译：用于通过致动器改变凸轮相位的可变气门正时机构的控制单元至少基于发动机停止状态下的发动机旋转角度和凸轮相位角校正紧接在发动机启动之后的致动器的操作量。

5. 发明授权

US09976498B2 Control apparatus for internal combustion engine and control method therefor 有权
公开(公告)号：US09976498B2
公开(公告)日：2018-05-22
申请号：US15123459
申请日：2014-09-25
申请人： Hitachi Automotive Systems, Ltd.
发明人： Kentaro Mikawa
IPC分类号： F01L1/34 , F02D41/22 , F02D41/00 , F02D41/06 , F02D41/28 , F02D13/02 , F02N19/00 , F02D41/26 , F02D41/08 , F02N11/00
CPC分类号： F02D41/0002 , F01L1/34 , F02D13/0234 , F02D13/0238 , F02D13/0261 , F02D41/062 , F02D41/064 , F02D41/08 , F02D41/22 , F02D41/26 , F02D41/28 , F02D2041/001 , F02D2200/021 , F02D2200/101 , F02D2200/1012 , F02D2200/503 , F02N11/00 , F02N19/004 , F02N2200/063 , Y02T10/18 , Y02T10/42
摘要： The present invention relates to an internal combustion engine including a VTC controller for controlling driving of a variable valve timing device and an engine control module (ECM) for calculating and transferring a valve timing control command. In the present invention, each of the VTC controller and the ECM detects whether an abnormality of a communication circuit used for transferring a control command is present or not. If the abnormality is detected, the VTC controller and the ECM set a target value for an abnormal state with the same characteristic, and perform a control operation based on the target value in the abnormal state. In this manner, a decrease in engine operability when an abnormality occurs in the communication circuit of a control command is suppressed.

6. 发明授权

US09708997B2 Control device and control method for internal combustion engine 有权
公开(公告)号：US09708997B2
公开(公告)日：2017-07-18
申请号：US15114932
申请日：2014-09-30
申请人： HITACHI AUTOMOTIVE SYSTEMS, LTD.
发明人： Kentaro Mikawa , Naoki Okamoto
IPC分类号： F01L1/344 , F02D41/22 , F02D41/00 , F01L1/352 , F01L13/00
CPC分类号： F02D41/222 , F01L1/344 , F01L1/352 , F01L2013/103 , F01L2013/111 , F01L2013/113 , F01L2800/11 , F01L2800/12 , F01L2820/032 , F01L2820/041 , F01L2820/042 , F02D41/009 , F02D2041/227 , Y02T10/40
摘要： The present invention relates to a control device and a control method for a variable valve timing mechanism that changes a valve timing by adjusting a rotational speed of a motor. The control device detects a phase angle RA1 based on an output of a crank angle sensor and an output of a cam angle sensor and calculates a change amount ΔRA of a rotational phase based on a difference between a rotation amount of a sprocket and a rotation amount of the motor. The control device stops calculating change amount ΔRA when a failure occurs in a motor rotation angle sensor. When a failure occurs in one of the crank angle sensor or the cam angle sensor, the control device stops calculating phase angle RA1 and calculates change amount ΔRA using a normal one of the sensors and the motor rotation angle sensor.

7. 发明授权

US09284891B2 Control apparatus and control method for variable valve mechanism 有权
标题翻译：可变气门机构的控制装置及控制方法
公开(公告)号：US09284891B2
公开(公告)日：2016-03-15
申请号：US14023644
申请日：2013-09-11
申请人： Hitachi Automotive Systems, Ltd.
发明人： Kentaro Mikawa
IPC分类号： F02D13/02
CPC分类号： F02D13/02 , F02D13/0238 , Y02T10/18
摘要： In a control apparatus for a variable valve mechanism that varies a valve characteristic of an engine valve, in a saturated state in which a calculated manipulated variable of the variable valve mechanism exceeds an outputtable manipulated variable, convergence to a desired position is achieved while suppressing a response delay and an overshoot. If a feedforward manipulated variable calculated according to a reference response exceeds an outputtable limit manipulated variable, a saturating amount (feedforward manipulated variable—limit manipulated variable) is integrated. Upon completion of the integration, the feedforward manipulated variable is corrected based on an FF manipulated variable correction amount, and the integrated value of saturating amount is replaced by a value obtained by subtracting the FF manipulated variable correction amount each time a correction is made. When the integrated value of saturating amount reduces to a predetermined value or less, a control mode is switched to feedback control.
摘要翻译：在用于改变发动机气门的阀特性的可变气门机构的控制装置中，在可变气门机构的计算的操作变量超过可输出的操作量的饱和状态下，在抑制响应延迟和过冲。如果根据参考响应计算出的前馈操作变量超过可输出限制操作变量，则会累积饱和量（前馈操作变量极限操纵变量）。在积分完成时，基于FF操作变量校正量来校正前馈操作变量，并且通过在每次进行校正时减去FF操作变量校正量而获得的值来代替饱和量的积分值。当饱和量的积分值降低到预定值或更小时，将控制模式切换到反馈控制。

8. 发明授权

US09982619B2 Device and method for detecting abnormality in rotation phase detection device, and rotation position control device using same 有权
公开(公告)号：US09982619B2
公开(公告)日：2018-05-29
申请号：US15555185
申请日：2016-03-02
申请人： HITACHI AUTOMOTIVE SYSTEMS, LTD.
发明人： Kentaro Mikawa
IPC分类号： F01L1/344 , F02D41/22 , F02D13/02 , F02D41/06 , F02D41/00 , F01L13/00
CPC分类号： F02D41/222 , F01L1/344 , F01L1/352 , F01L2001/0537 , F01L2013/103 , F01L2013/111 , F01L2013/113 , F01L2250/02 , F01L2800/11 , F01L2800/14 , F01L2820/032 , F01L2820/041 , F01L2820/042 , F02D13/0219 , F02D13/0238 , F02D41/009 , F02D41/042 , F02D41/062 , F02D41/1401 , F02D2013/0292 , F02D2041/001 , F02D2200/101 , Y02T10/18
摘要： It is intended to, when abnormality in either one of two rotation detection sections with different detection frequencies occurs, quickly and highly accurately detect the abnormality to favorably deal with abnormality occurring during low engine rotation. It is determined that abnormality is present in the rotation phase detection section, when an absolute value of difference between an actual VTC angle detected by a rotation phase detection section and an integrated value of a VTC change angle detected by motor rotation sensor 201 with the higher detection frequency than the frequency of detection of the actual VTC angle by the rotation phase detection section is equal to or greater than a predetermined value.

9. 发明申请

US20150233306A1 VARIABLE VALVE TIMING CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE, AND CONTROL METHOD 有权
标题翻译：用于内燃机的可变阀定时控制装置及控制方法
公开(公告)号：US20150233306A1
公开(公告)日：2015-08-20
申请号：US14432284
申请日：2014-03-07
申请人： HITACHI AUTOMOTIVE SYSTEMS, LTD.
发明人： Kentaro Mikawa
IPC分类号： F02D13/02
CPC分类号： F02D13/0203 , F01L1/34 , F01L2800/00 , F02D13/02 , F02D13/0215 , F02D13/0234 , F02D13/0249 , F02D41/1401 , F02D2041/001 , F02D2041/1409 , F02D2200/503 , F02D2200/70 , Y02T10/18
摘要： The present invention relates to variable valve timing control device and control method, which change valve timing of an internal combustion engine. An operation amount for controlling the valve timing is computed, and an operation amount computed at position detection timing of a valve timing control system is divided and output until next position detection timing.
摘要翻译：本发明涉及改变内燃机的气门正时的可变气门正时控制装置和控制方法。计算用于控制气门正时的操作量，并且将在气门正时控制系统的位置检测定时计算出的操作量分配并输出直到下一个位置检测定时。

10. 发明授权

US09046010B2 Control unit for variable valve timing mechanism and control method for variable valve timing mechanism 有权
标题翻译：可变气门正时机构控制单元及可变气门正时机构的控制方法
公开(公告)号：US09046010B2
公开(公告)日：2015-06-02
申请号：US13845815
申请日：2013-03-18
申请人： HITACHI AUTOMOTIVE SYSTEMS, LTD.
发明人： Nobuhiko Matsuo , Kentaro Mikawa
IPC分类号： F01L1/34 , F02D13/00
CPC分类号： F01L1/34 , F01L2820/032 , F02D13/00 , F02D13/0238 , Y02T10/18
摘要： A control unit for a variable valve timing mechanism for changing a cam phase by an electric actuator determines an influence on the operation of the variable valve timing mechanism based on the engine operating conditions. Then, based on the determination result, the control unit reduces the operation amount of the electric actuator in a predetermined range of the rotation angle of a camshaft.
摘要翻译：用于通过电动致动器改变凸轮相位的可变气门正时机构的控制单元基于发动机工作条件确定对可变气门正时机构的操作的影响。然后，根据判定结果，控制部将电动致动器的动作量减少到凸轮轴的旋转角度的规定范围。

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