公开(公告)号：US20140245978A1

公开(公告)日：2014-09-04

申请号：US14193860

申请日：2014-02-28

Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.

Inventor： Ryo TADOKORO ,  Shinichi KAWADA ,  Atsushi YAMANAKA ,  Hiroyuki NEMOTO

IPC: F01L13/00

CPC classification number: F01L1/344 ,  F01L2001/0537 ,  F01L2001/34433 ,  F01L2001/34479 ,  F01L2001/34496 ,  F01L2820/032

Abstract: In a valve timing control system of an internal combustion engine employing both an electric-motor-driven intake valve timing control device (VTC) and an electric-motor-driven exhaust VTC having similar fundamental configurations, a maximum drive-efficiency motor-speed range of a first electric motor of the intake VTC and a maximum drive-efficiency motor-speed range of a second electric motor of the exhaust VTC are set to differ from each other depending on two different working ranges respectively suitable for the intake VTC and the exhaust VTC such that the maximum drive-efficiency motor-speed range of the intake VTC is set higher than that of the exhaust VTC. A reduction ratio of a first speed reducer configured to reduce a rotational speed of the first electric motor is set higher than that of a second speed reducer configured to reduce a rotational speed of the second electric motor.

Abstract translation: 在采用电机驱动的进气门正时控制装置（VTC）和具有相似基本构造的电动机驱动排气VTC的内燃机的气门正时控制系统中，最大驱动效率电动机速度范围 并且排气VTC的第二电动机的最大驱动效率电动机速度范围被设定为彼此不同，这取决于分别适合于进气VTC和排气的两个不同的工作范围 VTC，使得进气VTC的最大驱动效率电动机速度范围被设定为高于排气VTC的最大驱动效率电动机速度范围。 被配置为将第一电动机的转速降低的第一减速器的减速比设定为比构成为减小第二电动机的转速的第二减速机的减速比更高。

公开(公告)号：US20180328239A1

公开(公告)日：2018-11-15

申请号：US15534160

申请日：2015-11-27

Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.

Inventor： Ryo TADOKORO ,  Isao DOI ,  Hiroyuki NEMOTO ,  Seiichi SUE

IPC: F01L1/352 ,  H02K5/10 ,  F01L1/344 ,  F16C19/54

CPC classification number: F01L1/352 ,  F01L1/34403 ,  F01L2250/02 ,  F01L2820/032 ,  F16C19/541 ,  H02K5/10

Abstract: A communicating hole, which communicates between a clearance space and the outside of a cover member, is formed in the cover member, and a seal cap is fitted to and retained in a distal-end opening of the communicating hole. The seal cap includes a cap main body having a ventilation through hole formed in an internal axial direction and an outer peripheral wall configured to engage with the communicating hole, a supporting portion fitted, from the outside, into a recessed groove formed in an outside end face of the cap main body, and a ventilation filter located on a bottom face of the recessed groove and retained and sandwiched between the cap main body and the supporting portion. Therefore, an internal pressure rise in the clearance space between the cover member and an electric motor can be effectively suppressed, and thus improved mountability and retainability can be obtained.

公开(公告)号：US20140373795A1

公开(公告)日：2014-12-25

申请号：US14293545

申请日：2014-06-02

Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.

Inventor： Atsushi YAMANAKA ,  Ryo TADOKORO ,  Hiroyuki NEMOTO ,  Isao DOI

IPC: F01L1/344

CPC classification number: F01L1/344 ,  F01L1/352 ,  F01L2013/103 ,  F01L2820/032

Abstract: A variable valve operating apparatus including an electric motor including a motor housing with a permanent magnet, and a speed reducing mechanism having a casing, the motor housing and the casing of the speed reducing mechanism being coupled to each other by a plurality of bolts, wherein the motor housing includes a convex portion formed in a portion of the motor housing which is opposed to one axial end of the permanent magnet, the convex portion having a threaded hole into which a tip end portion of each bolt is screwed, and a projection formed on an axial end surface of the convex portion in alignment with the threaded hole in an axial direction of the threaded hole, and wherein the axial end surface of the convex portion is located further spaced from the one axial end of the permanent magnet than the projection.

Abstract translation: 一种包括电动机的可变气门操作装置，包括具有永磁体的电动机壳体和具有壳体的减速机构，所述减速机构的所述电动机壳体和所述壳体通过多个螺栓彼此联接，其中， 马达壳体包括形成在马达壳体的与永磁体的一个轴向端部相对的部分中的凸部，凸部具有螺纹孔，每个螺栓的前端部被螺纹拧入，并且形成有突起 在所述螺纹孔的轴向上与所述螺纹孔对准的所述凸部的轴向端面上，并且所述凸部的轴向端面与所述突起的所述永磁体的一个轴向端部进一步间隔开 。

公开(公告)号：US20140224197A1

公开(公告)日：2014-08-14

申请号：US14178989

申请日：2014-02-12

Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.

Inventor： Ryo TADOKORO ,  Shinichi KAWADA ,  Atsushi YAMANAKA ,  Hiroyuki NEMOTO

IPC: F01L9/04

CPC classification number: F01L1/344 ,  F01L2001/0537 ,  F01L2001/34496 ,  F01L2820/032

Abstract: A valve timing control system for an internal combustion engine, comprises: an electric intake valve timing control apparatus to vary an intake valve timing with torque produced by an electric motor with electric power supplied through a power supply mechanism; and an electric exhaust valve timing control apparatus to vary an exhaust valve timing with torque produced by an electric motor with electric power supplied through a power supply mechanism. A heat generating portion in the power supply mechanism of the intake valve timing control apparatus is made of a heat resisting material whereas a heat generating portion in the power supply mechanism of the exhaust valve timing control apparatus is made of a material lower in heat resistance than the heat resisting material of the intake valve timing control apparatus.

Abstract translation: 一种用于内燃机的气门正时控制系统，包括：进气门正时控制装置，用于通过电力供应机构提供的电力来改变由电动机产生的转矩的进气门正时; 以及排气门正时控制装置，用于通过通过电源机构供给的电力，由电动机产生的转矩来改变排气门正时。 进气门正时控制装置的供电机构中的发热部由耐热材料制成，而排气门正时控制装置的供电机构中的发热部由耐热性低的材料制成， 进气门正时控制装置的耐热材料。

公开(公告)号：US20140123922A1

公开(公告)日：2014-05-08

申请号：US14065753

申请日：2013-10-29

Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.

Inventor： Ryo TADOKORO ,  Hiroyuki NEMOTO ,  Atsushi YAMANAKA

IPC: F01L1/344

CPC classification number: F01L1/344 ,  F01L2820/032

Abstract: In a valve timing control apparatus for an internal combustion engine, a plurality of projection sections projected toward a cover member are integrally mounted on a bearing member configured to rotatably journalize a camshaft and a plurality of positioning pins are mounted across (or extended over) the cover member and the respective projection sections.

Abstract translation: 在用于内燃机的气门正时控制装置中，朝向盖构件突出的多个突出部分一体地安装在构造成可旋转地使凸轮轴上凸起的轴承构件上，并且多个定位销安装在（或延伸）上 盖构件和相应的突出部分。