Aisin Seiki Kabushiki Kaisha

Nifco Inc.

Hiroyuki Hamasaki

Yuji Noguchi

Takeo Asahi

Tomohiro Kajita

Hideyuki Suganuma

Toru Sakakibara

Kenji Ikeda

Yoshiaki Iguchi

Hideomi Iyanaga

Tomokazu Harada

Youhei Mizuno

Kazuya Saito

Yusuke Maekawa

A variable valve timing control device includes a drive-side rotational body, a driven-side rotational body, a connecting bolt coaxially disposed with a rotary axis and connecting the driven-side rotational body to a camshaft, the connecting bolt formed with an advanced-angle port and a retarded-angle port from an outer circumferential surface of the connecting bolt through an inner space, a valve unit disposed at the inner space of the connecting bolt, and a check valve provided at an upstream in a supplying direction of fluid relative to the valve unit. The check valve includes a seat member formed with at least one circulation port at a position being away from the rotary axis; and a valve body configured to close the circulation port at a downstream in the supplying direction of the fluid relative to the seat member, the valve body including an opening portion about the rotary axis.

Variable valve timing control device

A valve opening/closing timing control apparatus includes: a driving side rotator configured to rotate synchronously with a crankshaft of an internal combustion engine; a driven side rotator disposed coaxially with a rotation axis of the driving side rotator and configured to rotate integrally with a valve opening/closing camshaft; a connecting bolt disposed coaxially with the rotation axis to connect the driven side rotator to the camshaft, and having an advanced angle port and a retarded angle port formed to extend from an outer peripheral surface to an inner space thereof, the advanced angle port and the retarded angle port communicating with an advanced angle chamber and a retarded angle chamber between the driving side rotator and the driven side rotator, respectively; and a valve unit disposed in the inner space of the connecting bolt.

Valve opening/closing timing control apparatus

A valve opening and closing timing control apparatus includes: a driving side rotator configured to rotate synchronously with a crankshaft of an internal combustion engine; a driven side rotator disposed coaxially with a rotation axis of the driving side rotator and configured to rotate integrally with a valve opening and closing camshaft; a phase controller configured to control a relative rotation phase between the driving side rotator and the driven side rotator by supply and discharge of a fluid; and a torsion spring configured to attain a biasing force to displace the relative rotation phase between the driving side rotator and the driven side rotator in a predetermined direction. The driving side rotator is fastened to a cover-shaped plate, and the torsion spring includes a first arm and a second arm.

Valve opening and closing timing control apparatus

A valve opening and closing timing control device includes: a driving-side rotating body synchronously rotated with a crankshaft of an engine and having a lid member fixed in a direction of the rotational axis; a driven-side rotating body integrally rotated with a camshaft for opening and closing a valve on the same rotational axis; a lock mechanism having a lock member moving in the direction and a lock recessed portion formed inside the lid member and into which the lock member is able to be fitted; and a torsion spring disposed outside the lid member and exerting a biasing force to the driving-side and driven-side rotating bodies, wherein a restricting projection portion for restricting a movement of the torsion spring in the direction is formed in the lid member.

Valve opening and closing timing control device

A spring holder supporting a torsion spring applying an urging force in a valve opening/closing timing control apparatus is configured to be able to be attached to an appropriate position relative to a driven side rotary body and rotatable in unison. The spring holder includes a seat portion that is connected and fixed to the driven side rotary body, a guide portion that extends along a rotational axis, an alignment portion fitted into an engaging portion of the driven side rotary body and a restricted portion fitted into a restricting portion of the driven side rotary body. A support portion holding an end of the torsion spring is formed in the guide portion.

A valve opening/closing timing control apparatus includes: a driving side rotator configured to rotate synchronously with a crankshaft of an internal combustion engine; a driven side rotator disposed coaxially with a rotation axis of the driving side rotator so as to rotate integrally with a valve opening and closing camshaft; a connecting bolt disposed coaxially with the rotation axis to connect the driven side rotator to the camshaft and having an advanced angle port and a retarded angle port formed to extend from an outer peripheral surface to an inner space thereof, which respectively communicate with an advanced angle chamber and a retarded angle chamber between the driving side rotator and the driven side rotator; and a valve unit disposed in the inner space of the connecting bolt, in which the valve unit includes a check valve, and the check valve includes an opening plate and a valve plate.

There are provided a cylindrical portion in which a passage for feeding/discharging working fluid to/from a fluid pressure chamber is formed and which is disposed inside a driven-side rotary body, a bolt member that connects the driven-side rotary body to a cam shaft, a valve body body for regulating a flow direction of the working fluid relative to the fluid pressure chamber and a valve accommodating body that accommodates the valve body, the valve body and the valve accommodating body being disposed inside the cylindrical portion, and an urging portion provided on at least one of an upstream side and a downstream side of the valve accommodating body and configured to generate a repulsive force between an other object that regulates a position of the valve accommodating body and the valve accommodating body.

A valve opening and closing timing control apparatus includes: a driving side rotor synchronously rotating with a crankshaft of an internal combustion engine; a driven side rotor disposed coaxially with a rotary axis of the driving side rotor and synchronously rotating with a camshaft; a connecting bolt disposed coaxially with the rotary axis, and connecting the driven side rotor to the camshaft; and a position determination unit performing positioning between the driven side rotor and the camshaft, or in a case where an intermediate member is provided between the driven side rotor and the camshaft, between the driven side rotor and the intermediate member, or between the camshaft and the intermediate member, wherein the position determination unit includes an engaging pin, first and second hole portions, and a deformation absorbing unit.

A valve opening and closing timing control apparatus includes: a driving side rotor synchronously rotating with a crankshaft of an internal combustion engine; a driven side rotor disposed coaxially with the driving side rotor and synchronously rotating with a camshaft; a fluid pressure chamber formed on at least one of the driving side and driven side rotors, and partitioned into advance angle and retard angle chambers; a bolt member disposed coaxially with a rotary axis of the driven side rotor, connecting the driven side rotor and the camshaft, and provided with a cylindrical portion; a partition body provided with a press-fit portion, and partitioning the cylindrical portion into first and second flow passages; a valve body opening and closing the first flow passage; and a valve housing body accommodating the valve body.

A valve opening and closing timing control apparatus includes: a driving side rotor synchronously rotating with a crankshaft of an engine; a driven side rotor disposed coaxially with the driving side rotor and synchronously rotating with a camshaft in the internal combustion engine; a fluid pressure chamber formed on at least one of the driving side and driven side rotors, and partitioned into advance angle and retard angle chambers; a bolt disposed coaxially with a rotary axis of the driven side rotor, connecting the driven side rotor and the camshaft, and including a cylindrical portion coaxial with the rotary axis; and a partition body including a press-fit portion press-fitted into the cylindrical portion, and partitioning the cylindrical portion into first and second flow passages for use for feeding and discharging working fluid to and from the fluid pressure chamber, wherein the press-fit portion is provided with a cutting portion.

A valve opening and closing timing control apparatus includes: a driving side rotor synchronously rotating with a crankshaft of an engine; a driven side rotor disposed at a coaxial core with a rotary shaft core of the driving side rotor and integrally rotating with a camshaft for a valve opening and closing; a connecting bolt disposed at the coaxial core with the rotary shaft core to connect the driven side rotor to the camshaft, and on which an advance angle port and a retard angle port are formed on an outer peripheral surface; and a spool disposed in a spool chamber of the inside of the connecting bolt, and controlling the feeding and discharging of working fluid to the advance angle port or the retard angle port from a pump port formed on the connecting bolt.

The valve opening/closing timing control device includes: a driving rotating body; a driven rotating body; a fixed shaft portion; a fluid pressure chamber; a partitioning portion; and a phase control unit for controlling a rotation phase by supplying/discharging pressurized fluid to/from an advancing chamber or a retarding chamber via an inside of the fixed shaft portion. The driven rotating body has: an inner circumferential member with a cylindrical portion, and a coupling plate portion of the camshaft, the cylindrical portion and the coupling plate portion being integrated with each other; and an outer circumferential member provided with the partitioning portion. The outer circumferential member includes the inner circumferential member in a unified manner so as to have the same rotational axis. The inner circumferential member is formed with an iron-based material. The outer circumferential member is formed with a material that is lighter in weight than the iron-based material.

Valve opening/closing timing control device

A valve opening and closing timing control apparatus includes a torsion coil spring provided at an accommodation chamber which is defined by a front member provided at a drive-side rotational member and a tubular void provided at a driven-side rotational member, the torsion coil spring engaging with the front member and the driven-side rotational member to bias the driven-side rotational member in an advanced or a retarded angle direction relative to the driven-side rotational member and an oil reservoir portion defined by an outer surface of the torsion coil spring facing the driven-side rotational member and at least one recess portion provided at the driven-side rotational member, the recess portion being provided in a radially outer direction from a position at a radially outer side than an inner diameter of the torsion coil spring and at a radially inner side than an outer diameter of the torsion coil spring.

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Obu, Japan

Hiroyuki Hamasaki