Mazda Motor Corporation

Kenta Kobayashi

Daisuke Shimo

Masahiro Miyazaki

Junichi Taga

Tomohiro Koguchi

Takeo Yamauchi

Yoshie Kakuda

Yoshihisa Nakamoto

Kenta Honda

Yoshiyuki Uehane

Daisuke Fukuda

Atsuhiro Hatabu

Shinichi Hikitani

Akira Tsuda

Hiroaki Gotan

Keitaro Kageyama

Yukio Jo

Kenji Tanaka

Michiyuki Miura

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

A multi-cylinder engine having an engine body with a cylinder head is provided. The engine includes first and second cylinder groups, each having a plurality of independent exhaust passage parts provided to the cylinder head and connected to cylinders of the first and second cylinder groups, respectively, and first and second collective exhaust passage parts collecting the first and second pluralities of independent exhaust passage parts at a location downstream in an exhaust gas flow direction, and having an opening formed in the side surface part of the cylinder head, first and second exhaust-pipe parts each connected to the openings of the first and second collective exhaust passage parts, respectively, an exhaust gas recirculation (EGR) passage connected at one end to the first exhaust passage group and connected at the other end to an intake passage, and an exhaust gas temperature sensor provided to the first exhaust-pipe part.

Multi-cylinder engine

A start control device of a compression self-ignition engine is provided. The device includes: a determining module for determining whether a piston of a compression-stroke-in-stop cylinder that is stopped on a compression stroke according to an automatic stop is within a specific range set on a bottom dead center side of a predetermined reference stop position; an injection control module for controlling each fuel injection valve to inject fuel into the compression-stroke-in-stop cylinder first after the piston of the compression-stroke-in-stop cylinder is determined to be stopped within the specific range and the engine restart condition is satisfied; and an in-cylinder pressure estimating module for estimating an in-cylinder pressure of the compression-stroke-in-stop cylinder at a first top dead center on the compression stroke in the restart, where the piston of the compression-stroke-in-stop cylinder reaches after the restart starts.

Start control device of compression self-ignition engine

Growing community of inventors

Hiroshima, Japan

Kenta Kobayashi