Mazda Motor Corporation

Keitaro Kageyama

Takuya Sugisawa

Narihito Hongawara

Satoshi Fujikawa

Hiroki Tanabe

Shingo Kodama

Daisuke Shimo

Tomohiro Koguchi

Yoshie Kakuda

Kenta Honda

Shotaro Nagai

Takashi Ishiyama

Akira Tsuda

Daisuke Fukuda

Shinichi Hikitani

Masahiro Miyazaki

Hiroaki Gotan

Kenta Kobayashi

Kenji Tanaka

Michiyuki Miura

Yukio Jo

Kazufumi Kumakura

Takahiro Okazaki

Toshiaki Tohoda

Aki Murai

Masaki Yamamoto

Yusaku Takahashi

A cooling device of a vehicle is provided, which includes a transmission, a first coolant circuit where a first coolant which cools the internal combustion engine circulates, a second coolant circuit independent from the first coolant circuit, where a second coolant which cools the electric drive system circulates, and a fluid circuit where fluid which lubricates and cools friction engagement elements in the transmission circulates. The fluid circuit includes a first heat exchanger which exchanges heat between the fluid and the first coolant, a second heat exchanger in-series with the first heat exchanger which exchanges heat between the fluid and the second coolant, a first adjuster which changes a flow rate of the fluid passing through the first heat exchanger, and a second adjuster which changes a flow rate of the fluid passing through the second heat exchanger.

Vehicle cooling device

The powertrain device for a vehicle includes an engine and an automatic transmission, the automatic transmission includes a plurality of friction fastening elements for selectively switching motive power transmitting paths, a predetermined friction fastening element among the plurality of friction fastening elements is a travel-start friction fastening element performing slip control in a travel start, and the powertrain device includes, between the engine and the automatic transmission, a motive power connection-disconnection clutch which is released at least in an engine start and is fastened earlier than the travel-start friction fastening element in a travel start of the vehicle.

Powertrain device for vehicle

A power train device of a vehicle includes an engine and an automatic transmission. The automatic transmission is configured such that in a neutral state, multiple ones of multiple rotary elements forming a power transmission path other than a rotary element coupled to an input member and a rotary element coupled to an output member are in a non-restraining state. The multiple ones of the multiple rotary elements include a rotary element of a predetermined brake among multiple friction fastening elements, and the predetermined brake is fastened before a fuel supply upon an engine start.

Power train device of vehicle

A power train device for a vehicle is provided with a selector valve that is switched between a first state in which oil discharged from an electric oil pump is able to be supplied as a hydraulic fluid to an engagement hydraulic chamber of a vehicle-starting frictional engagement element, and a second state in which the oil is able to be supplied as a lubricating oil to the vehicle-starting frictional engagement element through a first lubricating oil supply circuit, depending on a magnitude of a discharge pressure of a mechanical oil pump.

Power train device for vehicles

Growing community of inventors

Higashihiroshima, Japan

Keitaro Kageyama