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公开(公告)号：US09850788B2
公开(公告)日：2017-12-26
申请号：US15083641
申请日：2016-03-29
Applicant: DENSO CORPORATION , NIPPON SOKEN, INC.
Inventor： Makoto Otsubo , Hiroki Takahashi
Abstract: A valve timing controller includes a driving rotor, a driven rotor, a planetary rotor, a planetary carrier, and an elastic component to produce a restoring force biasing the planetary rotor to an eccentric side such that the driving rotor is inclined to the driven rotor. The driving rotor has an inclination angle θ1 relative to the driven rotor in a first inclination state where the driving rotor is in contact with the driven rotor on both sides in the axial direction. The inclination angle θ1 is smaller than an inclination angle θ2 in a second inclination state where the driving rotor is in contact with the driven rotor on both sides in the radial direction, and is smaller than an inclination angle θ3 in a third inclination state where the driving rotor is in contact with the camshaft on both sides in the radial direction.
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公开(公告)号：US11339689B2
公开(公告)日：2022-05-24
申请号：US17338350
申请日：2021-06-03
Applicant: DENSO CORPORATION
Inventor： Makoto Otsubo , Hiroki Takahashi , Kenichi Tomomatsu , Shuhei Yamamoto
Abstract: A bearing portion of a planetary rotatable body for providing bearing support in a thrust direction is defined as a planetary thrust bearing portion. A driving-side rotatable body or a driven-side rotatable body, which is configured to contact the planetary thrust bearing portion in the thrust direction, is defined as a specific rotatable body. A bearing portion of the specific rotatable body for providing bearing support in the thrust direction is defined as a specific thrust bearing portion. In a parallel state where the specific thrust bearing portion and the planetary thrust bearing portion are parallel to each other, the specific thrust bearing portion and the planetary thrust bearing portion contact with each other only on one of an eccentric side and a counter-eccentric side of the planetary rotatable body while the counter-eccentric side is opposite to the eccentric side.
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公开(公告)号：US11242775B2
公开(公告)日：2022-02-08
申请号：US17008725
申请日：2020-09-01
Applicant: DENSO CORPORATION
Inventor： Takanobu Aochi , Hitoshi Maegawa , Tomohiro Hayashi , Hiroki Takahashi , Kenji Tada
Abstract: A valve timing adjustment device includes a drive-side rotating body that rotates in conjunction with a crankshaft, a driven-side rotating body that rotates integrally with a camshaft, a speed reduction mechanism that transmits rotation while allowing relative rotation between the drive-side rotating body and the driven-side rotating body. The driven-side rotating body includes a fastening portion fastened to the end portion of the camshaft by a center bolt, a bearing portion that is located radially outward of the fastening portion and that axially supports the drive-side rotating body, and a fitting outer surface that is fitted to a regulating member on a side where an outer diameter of an axial contact surface with the other member on one side and the other side in the axial direction of the driven-side rotating body is large.
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公开(公告)号：US20210404351A1
公开(公告)日：2021-12-30
申请号：US17447482
申请日：2021-09-13
Applicant: DENSO CORPORATION
Inventor： Makoto Otsubo , Kenichi Tomomatsu , Shuhei Yamamoto , Hiroki Takahashi , Soichi Kinouchi
Abstract: An Oldham coupling includes: a driven Oldham flange that is formed at a drive-side rotor; a drive Oldham flange that is formed at a planetary rotor; and an Oldham intermediate that is configured to synchronize rotation of the driven Oldham flange and rotation of the drive Oldham flange. A thrust section is formed at a rotor plate portion which is a portion other than the Oldham coupling. The thrust section is configured to limit tilting of the planetary rotor relative to the driven Oldham flange when the thrust section contacts the planetary rotor in an axial direction. There is satisfied a relationship of θ2>θ1 where: θ1 is a maximum tilt amount of the planetary rotor relative to the driven Oldham flange; and θ2 is a maximum tilt amount of the planetary rotor in a clearance formed at the Oldham coupling.
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公开(公告)号：US10280816B2
公开(公告)日：2019-05-07
申请号：US15552375
申请日：2016-04-21
Applicant: DENSO CORPORATION , SOKEN, INC.
Inventor： Shota Toda , Makoto Otsubo , Hiroki Takahashi
Abstract: A planetary rotor includes: a planetary gear engaged with a driving rotor and a driven rotor on an eccentric side; and a single sequence type planetary bearing having an outer ring held by the planetary gear, an inner ring supported by a planetary carrier in the radial direction and receiving a restoring force from an elastic component, and a plurality of spherical rolling elements interposed between the outer ring and the inner ring. The outer ring is arranged to form a rolling contact part in contact with the spherical rolling element on the eccentric side, with a contact angle to a specific side in the axial direction. A thrust-bearing part where the driving rotor is supported by the driven rotor on the specific side and on the eccentric side is located closer to a rotation center line of the driven rotor than the rolling contact part is.
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Patent Agency Ranking
公开(公告)号：US11441453B2
公开(公告)日：2022-09-13
申请号：US17447482
申请日：2021-09-13
Applicant: DENSO CORPORATION
Inventor： Makoto Otsubo , Kenichi Tomomatsu , Shuhei Yamamoto , Hiroki Takahashi , Soichi Kinouchi
Abstract: An Oldham coupling includes: a driven Oldham flange that is formed at a drive-side rotor; a drive Oldham flange that is formed at a planetary rotor; and an Oldham intermediate that is configured to synchronize rotation of the driven Oldham flange and rotation of the drive Oldham flange. A thrust section is formed at a rotor plate portion which is a portion other than the Oldham coupling. The thrust section is configured to limit tilting of the planetary rotor relative to the driven Oldham flange when the thrust section contacts the planetary rotor in an axial direction. There is satisfied a relationship of θ2>θ1 where: θ1 is a maximum tilt amount of the planetary rotor relative to the driven Oldham flange; and θ2 is a maximum tilt amount of the planetary rotor in a clearance formed at the Oldham coupling.
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公开(公告)号：US11434788B2
公开(公告)日：2022-09-06
申请号：US17521251
申请日：2021-11-08
Applicant: DENSO CORPORATION
Inventor： Kenji Tada , Hiroki Takahashi
Abstract: A valve timing adjusting device adjusts an opening/closing timing of a first valve driven by a rotation of a first camshaft and an opening/closing timing of a second valve driven by a rotation of a second camshaft. The valve timing adjusting device includes a first driving circuit controlling a first motor configured to generate a torque to shift a rotation phase of the first camshaft and a second driving circuit controlling a second motor configured to generate a torque to shift a rotation phase of the second camshaft. A first switching element of the first driving circuit operates at a switching frequency that is different from that of a second switching element of the second driving circuit.
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公开(公告)号：US10858964B2
公开(公告)日：2020-12-08
申请号：US16733557
申请日：2020-01-03
Applicant: DENSO CORPORATION
Inventor： Makoto Otsubo , Hiroki Takahashi
Abstract: A single-row planetary bearing includes a single row of spherical rolling elements between an outer ring and an inner ring. A planetary gear is supported by a thrust bearing portion and is radially supported by the outer ring. The planetary gear performs a planetary motion while engaging with a driving rotor and a driven rotor at an eccentric side to adjust a rotational phase between the driving rotor and the driven rotor. The thrust bearing portion supports the planetary gear that is tilting with respect to the revolution centerline. The planetary gear has a recessed portion opened toward the thrust bearing portion. When the rotational phase is adjusted to a specific phase, the recessed portion is positioned at an anti-eccentric side opposite to the eccentric side with respect to a rotation centerline of the planetary gear.
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公开(公告)号：US11459916B2
公开(公告)日：2022-10-04
申请号：US17473503
申请日：2021-09-13
Applicant: DENSO CORPORATION
Inventor： Makoto Otsubo , Kenichi Tomomatsu , Shuhei Yamamoto , Hiroki Takahashi , Soichi Kinouchi
Abstract: A drive-side rotor is rotated synchronously with a crankshaft. A driven-side rotor is rotated integrally with a camshaft. An internal gear section is formed at the driven-side rotor. An Oldham coupling includes: a driven Oldham flange that is formed at the drive-side rotor; a drive Oldham flange that is formed at the planetary rotor; and an Oldham intermediate that is configured to synchronize rotation of the driven Oldham flange and rotation of the drive Oldham flange while permitting eccentricity between the driven Oldham flange and the drive Oldham flange. There is satisfied a relationship of θ2
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10.发明授权公开(公告)号：US11008902B2
公开(公告)日：2021-05-18
申请号：US16781020
申请日：2020-02-04
Applicant: DENSO CORPORATION
Inventor： Hiroki Takahashi , Kenji Tada
Abstract: A valve timing adjustment device having a phase adjustment unit including an input rotator, a driving rotator that rotates in conjunction with a crankshaft, a driven rotator that rotates in conjunction with a camshaft that changes a relative rotation phase between the driving rotator and the driven rotator. A controller is configured to perform a startup phase control when operation of the internal combustion engine is started, the startup phase control including setting the relative rotation phase to a predetermined initial phase, and perform a startup preparation control during a period after the internal combustion engine is stopped and before the startup phase control is performed, the startup preparation control including changing the relative rotation phase.
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