Toyota Jidosha Kabushiki Kaisha

Aisin Aw Co., Ltd.

Shinichiro Suenaga

Hiroyuki Amano

Takeshi Kanayama

Yu Miyahara

Masato Watanabe

Shinichi Baba

Michitaka Tsuchida

Masayuki Ishibashi

Shingo Aijima

Masanori Matsui

Hiromichi Kimura

Ryuji Ibaraki

Akiko Nishimine

Akihiro Sato

Masahiro Kojima

Koichi Kato

Tomoo Atarashi

Takeshi Miyagawa

Yasuo Shimizu

Masato Nakano

Fusahiro Tsukano

Daiki Sato

Tatsuo Obata

Takamasa Takeuchi

Yoshimitsu Yokouchi

Satoru Takahashi

Akitaka Ichikawa

Yosuke Kato

Nobuhito Mori

Satoshi Miyanaga

Noritaka Nakajima

Ryuichi Hasegawa

Norihiro Mae

Hiroki Kunifuda

Iori Matsuda

Kouki Kawamoto

Hyuksoo Kwon

Shingo Aijimi

A torsional vibration reducing device includes: a mass damper configured to reduce ripples of torque by inertia moment of an inertial body; a spring damper configured to reduce ripples of torque to be transmitted between an input-side rotational member and an output-side rotational member by an elastic body being compressed are placed side by side in a predetermined axis direction; and a bolt configured to fix the inertial body and the input-side rotational member to each other in the predetermined axis direction by being inserted from the input-side rotational member side. The input-side rotational member includes a receiving portion recessed toward the mass damper side such that at least part of a head of the bolt in its height direction is received by the receiving portion.

Torsional vibration reducing device

An electric vehicle includes a mechanical-electrical integrated unit constituted by a drive apparatus and an electric-power control apparatus that are housed in a same casing. The drive apparatus includes a first electric motor, a second electric motor and a transmission device. The electric-power control apparatus is configured to control an electric power transmitted and received by the first and second electric motors. The electric-power control apparatus and the drive apparatus are housed in upper and lower casing portion of the casing, respectively. The second electric motor includes a stator core that is provided with a plurality of fastened portions, such that one of the plurality of fastened portions is disposed in a position which overlaps the upper casing portion in a vertical direction of the vehicle and which is located on a front side of an axis of the second electric motor in a longitudinal direction of the vehicle.

Electric vehicle

A vehicle drive-force transmitting apparatus including: a casing provided with an oil supply hole; a pump for pumping out an oil stored in the casing; and a pipe for delivering the oil pumped out by the pump, such that the oil discharged from the pipe is supplied to the oil supply hole. The oil is to be discharged from the pipe collides with an oil collision portion which is a portion of the casing and which is located on an upper side of the oil supply hole. The casing includes a guide portion and a block portion. The guide portion is located on a lower side of the oil collision portion, so as to guide the oil discharged from the pipe toward the oil supply hole. The block portion is located to surround the oil collision portion, so as to block the oil splashing from the oil collision portion.

Drive-force transmitting apparatus for vehicle

A vehicle drive-force transmitting apparatus including: a casing provided with an oil supply hole through which an oil is to be supplied to a lubrication-required element. The casing is provided with a first guide portion and a second guide portion. The first guide portion defines a first path that is configured to guide the oil to flow from a diagonally upper side of the oil supply hole, toward the oil supply hole. The second guide portion defines a second path that is configured to separate the oil flowing along the first path, into a part of the oil and another part of the oil in an intermediate portion of the first path and to cause the part of the oil to join with the another part the oil in a position located right above the oil supply hole.

A concave portion provided in at least one of the first assembled surface, and other assembled surfaces for fastening the driving force source, in the region corresponding to the outer race of the tapered roller bearing, the other assembled surfaces provided to one of the fixed component and the driving force source.

Vehicular power transmission device

An apparatus includes a case, a motor, a gear mechanism, a lubrication mechanism, and a cooling mechanism. The motor and the gear mechanism are housed in the case. The gear mechanism includes a specified gear and a first gear. A vertical lower section of the first gear is positioned above a surface of the oil. The lubrication mechanism lubricates the gear mechanism by the oil thrown up by the specified gear. The cooling mechanism includes an oil pump and a pipe. The oil pump and the pipe supply the oil reserved in the case to the motor. The pipe is located above the first gear. The pipe has a hole, and the oil discharged from the hole. The hole is positioned above the first gear. A normal line direction of the hole differs from a vertically downward direction. The first gear does not overlap the normal line direction.

Vehicle drive apparatus

A control device for a vehicle includes an electronic control unit. The electronic control unit is configured to set a share ratio of driving force of the first electric motor and the second electric motor. The electronic control unit is configured to set the share ratio of the driving force such that when the temperature of a pinion gear in a planetary gear mechanism is higher than a specified temperature, the share ratio of the driving force of the first electric motor is lower than the share ratio when the temperature is lower than the specified temperature.

Control device and control method for vehicle

In a vertical through hole of a rotational shaft, a first protrusion portion and a second protrusion portion protruding from an inner peripheral surface of the vertical through hole are provided in an axial direction of the through hole to form a storage area for storing oil, and discharge holes for directly discharging oil flowing over the first protrusion portion into the transaxle casing are provided in parallel with cooling holes.

Cooling system for motor

The control device of the present invention causes an engine to perform both partial cylinder operation and also all-cylinder operation, and moreover changes the operating point of the engine when the motor torque of a second motor-generator enters into operating point changeover ranges Rand R. The operating point changeover range Rwhen the engine is performing partial cylinder operation is set to be wider, as compared to the operating point changeover range Rwhen the engine is performing all-cylinder operation.

Control device for hybrid vehicle

It is provided a control device of a hybrid vehicle having a damper device disposed in a power transmission path between an engine and an electric motor, the damper device having different torsion characteristics between torsion in positive direction in which drive power is transmitted from the engine toward the electric motor and torsion in negative direction in which drive power is transmitted from the electric motor toward the engine, the control device being configured to increase rotation of the engine with the electric motor to start the engine, the torsion characteristic in the negative direction of the damper device including a plurality of torsion characteristics having torsional rigidity varying depending on an angle of the torsion, and at start of the engine, the plurality of torsion characteristics being selectively used depending on an engine rotation speed to increase the engine rotation speed.

Control device of hybrid vehicle

A vehicle power transmission device is disposed on a hybrid vehicle having an engine and an electric motor, the vehicle power transmission device includes a first member having one of outer circumferential teeth disposed around one axial center or inner circumferential teeth meshing with the outer circumferential teeth and a second member having the other teeth, the inner circumferential teeth and the outer circumferential teeth meshes with each other to limit relative rotation around the one axial center between the first member and the second member, the relative rotation between the first member and the second member is limited to transmit torque of the electric motor to drive wheels. The vehicle power transmission device comprises: a sliding member sliding relative to at least one of the first member and the second member while generating frictional resistance as the first member and the second member relatively rotate within a range corresponding to a circumferential gap between the outer circumferential teeth and the inner circumferential teeth, the sliding member being a hollow elastic body, the sliding member sliding relative to at least one of the first member and the second member depending on magnitude of the torque of the electric motor.

Power transmission device for vehicle

A dynamic damper for attenuating torsional vibration of a rotary member, in which a weighted center of a rolling member is offset from a geometric center to trace an elliptical orbit of a cycloid pendulum. The dynamic damper including, a housing having a rolling surface on its inner surface is formed in a rotary member, and a rolling member held in the housing in a manner to be rolled on the rolling surface by torque pulse exerted on the rotary member. In the dynamic damper, a curvature of the rolling surface is entirely constant, and a radius of the rolling member is smaller than that of the rolling surface. A weighted center of the rolling member is offset from a geometric center thereof. The rolling member is guided by a guiding mechanism to roll on the rolling surface.

Dynamic damper

To provide a simply-structured vibration damping device having excellent vibration damping capacity. A vibration damping device is configured to damp torsional vibrations of a rotary member of a hydraulic transmission, in which the rotary member is rotated integrally with a drive side impelleror with a driven side impeller, and in which the drive side impellerand the driven side impellerare connected with a lockup clutchactuated by fluid pressure. The vibration damping device comprises: a holding chamberrotated integrally with the driven side impeller; a rolling memberheld in the holding chamber, which is rotated in a rotational direction of the driven side impellerbut allowed to rotate relatively with the driven side impeller; and a movable memberconfigured to lock the rolling memberin the holding chamberwhen actuated by the fluid pressure for disengaging the lockup clutch, and to unlock the rolling memberin the holding chamberwhen actuated by the fluid pressure for engaging the lockup clutch

Vibration damping device

A vibration damping device capable of reducing a change in an order frequency of a reciprocating motion of a pendulum resulting from eccentricity of rotational members therein. The vibration damping device comprises a pendulum damping mechanism having a mass to dampen the torsional vibrations by an oscillating motion thereof resulting from the torsional vibrations. An inertial body is arranged in the prime mover side of the rotary shaft, an elastic damping mechanism is connected with a transmission side of the inertial body in a power transmittable manner, a pendulum damping mechanism is connected with the transmission side of the elastic damping mechanism in a power transmittable manner, and a torque limiter mechanism is connected with the transmission side of the pendulum damping mechanism in a power transmittable manner.

Growing community of inventors

Susono, Japan

Shinichiro Suenaga