Aisin Aw Co., Ltd.

Toyota Jidosha Kabushiki Kaisha

Aisin Corporation

Naoya Jinnai

Mikio Iwase

Yukihiko Ideshio

Yuji Inoue

Daiki Suyama

Tatsuya Okishima

Kensuke Wada

Hiroaki Sanji

Nozomu Takahashi

Takuya Nakajima

Toshihiko Kamiya

Tomohide Suzuki

Hiroshi Kato

Eiji Ito

Minoru Todo

Kiyonori Takagi

Masanori Murakami

Shota Ikeda

Terufumi Miyazaki

Natsuki Sada

Yousuke Michikoshi

Takahiro Kato

Masahiro Otake

Hiroshi Yoshikawa

Takuyo Maeda

Masahiro Izuhara

Kazuki Toya

Yuki Kawamoto

A transmission mechanism is provided with an output gear drivingly coupled to at least one of a pair of output members and placed coaxially with the pair of output members. A direction in which a rotating electrical machine and an inverter device are arranged side by side in an axial view is defined as a first direction. A direction perpendicular to both an axial direction and the first direction is defined as a second direction. A first output member that is one of the pair of output members is placed between the rotating electrical machine and the inverter device in the first direction, at a position in the second direction where both the rotating electrical machine and the inverter device are placed. The output gear is placed in such a manner as to overlap each of the rotating electrical machine and the inverter device in the axial view.

Vehicle drive apparatus

A vehicle drive device is provided with a lubricating path including a first oil pump to pump up an oil stored in the casing by the first oil pump and to supply the oil to the power transmission mechanism for lubricating the power transmission mechanism, and a cooling path that is separated from the lubricating circuit and provided for the rotating electric machine, the cooling path including a second oil pump to pump up the oil stored in the casing by the second oil pump to supply the oil exclusively to the rotating electric machine for cooling the rotating electric machine, the second oil pump is an electric oil pump, and the cooling path is provided with an oil cooler cooling the oil to be supplied to the rotating electric machine.

Vehicle drive device for lubrication a power transmission and cooling a rotating electric machine

A vehicle drive device comprises: a power transmission mechanism transmitting a drive power from a drive power source to a plurality of wheels; a differential gear mechanism provided in the power transmission mechanism and distributing the drive power input from the drive power source to the plurality of wheels; a casing housing the power transmission mechanism; and an oil pump sucking a lubricating oil stored in the casing, and the device drives the oil pump in conjunction with rotation of the differential gear mechanism. In the device, a catch tank storing the lubricating oil is provided in the casing, an introduction path is formed in the casing for introducing the lubricating oil scooped up by the differential gear mechanism during backward running of a vehicle into the catch tank, and a discharge oil passage connected to a discharge port of the oil pump is connected to the catch tank.

Vehicle drive device

A vehicle drive includes a speed change mechanism connected to a rotary electric machine; an output member connected to the speed change mechanism and wheels; an engagement device changes a state of engagement between an input member connected to an engine and the speed change mechanism; a hydraulic pump driven by the engine or the rotary electric machine; a first pressure control device that controls pressure supplied from the pump and supplies the pressure to the speed change mechanism; a second, separate hydraulic pressure control device that controls the pressure supplied from the pump and supplies the pressure to the engagement device; and a case that houses the rotary electric machine, speed change mechanism, engagement device, and pump. At least the engagement device is housed in a space formed by the case, and the second hydraulic pressure control device is provided at a part of the case forming the space.

In an automatic transmission, an engagement oil chamber and a centrifugal oil pressure cancel chamber of a clutch corresponding to a third ring gear of a Ravigneaux type planetary gear mechanism are defined by a drum member, a piston, and a cancel plate that rotate integrally with the third ring gear. An engagement oil chamber and a centrifugal oil pressure cancel chamber of a clutch corresponding to a third sun gear of the Ravigneaux type planetary gear mechanism are defined by a shaft portion, a piston, and an oil-chamber defining member that rotate integrally with the third sun gear.

Multi-stage transmission

A clutch that includes a friction plate; a separator plate; a clutch hub; and a piston that presses the friction plate and the separator plate, wherein the clutch hub includes a hub on which an inner peripheral portion of the friction plate or the separator plate is fitted, a tubular shaft that movably supports the piston, and an engagement oil chamber defining wall that together with the piston defines an engagement oil chamber to which an engagement oil pressure is supplied, the hub is spline-fitted on a gear of a planetary gear so as to rotate with the gear, and the tubular shaft is rotatably supported by a central shaft and is fitted by a spigot joint in the gear.

Clutch and speed change device including the same

A brake of an automatic transmission includes: first and second recessed portions and formed in a center support; a first piston having a first pressure-receiving portion that is disposed in the first recessed portion and defines a first engagement oil chamber and having a plate-pressing portion that presses friction plates and separator plates; a second piston having a second pressure-receiving portion that is disposed in the second recessed portion and defines a second engagement oil chamber and a piston-pressing portion that presses the first piston by supply of oil pressure to the second engagement oil chamber; and a return spring that biases the first piston so that the first piston moves away from the friction plates and the separator plates.

A multi-stage transmission that includes a case including an annular support that extends radially inward from an inner peripheral surface of the case; a first planetary gear mechanism that includes a plurality of rotating elements and to which power is transmitted from the input member; a second planetary gear mechanism that is disposed on an opposite side of the support of the case from the first planetary gear mechanism; a clutch that interconnects any one of the rotating elements of the first planetary gear mechanism with an element to be connected which is included in the second planetary gear mechanism and releases this interconnection; and a brake that connects the element to be connected to the case to hold this element stationary and releases this connection.

Growing community of inventors

Anjo, Japan

Naoya Jinnai