Mazda Motor Corporation

Kenta Honda

Tomohiro Koguchi

Daisuke Shimo

Hirokazu Matsuura

Daisuke Fukuda

Masanori Hashimoto

Yoshie Kakuda

Akira Tsuda

Shinichi Hikitani

Masahiro Miyazaki

Keiichi Kamimura

Hiroaki Gotan

Keitaro Kageyama

Keisuke Yamaguchi

Kenta Kobayashi

Kenji Tanaka

Atsushi Yamada

Yukio Jo

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

An engine lubrication system including: an oil pump configured to be driven by an engine; an oil jet mechanism configured to inject oil pressure-fed by the oil pump to a piston; and circuitry configured to set a target hydraulic pressure of the oil injected from the oil jet mechanism according to an operation state of the engine; determine a hydraulic pressure state of the oil injected from the oil jet mechanism; and change a gear stage of the automatic transmission to a lower gear stage in a case that a predetermined condition between the determined hydraulic pressure state and the target hydraulic pressure is satisfied.

Engine lubrication system

This application discloses a cylinder block structure including: a cylinder block surrounding a cylinder array formed by a plurality of cylinders lined up in a first direction; a reinforcement plate including: a first fastening portion fastened to the cylinder block; and a second fastening portion fastened to the cylinder block at a position separated from the first fastening portion in a second direction that intersects with the first direction; and an oil pump that supplies oil to the cylinder block. The oil pump is fastened to the cylinder block together with the reinforcement plate. The reinforcement plate is interposed between the cylinder block and the oil pump, and has a length that is equal to or more than half of the cylinder array in the first direction.

Cylinder block structure for engine

An object of the present invention is to simplify portions of an oil supply passage which portions are formed at a cylinder block. An oil supply device according to the present invention includes a cylinder block, an oil pan, an oil pump, and an oil filter. Wall portions of the oil pan are coupled to wall portions of the cylinder block. An oil filter is attached to the oil pan. An upstream oil supply passage through which the oil filtrated by the oil filter flows is formed at the oil pan. A downstream oil supply passage including a main gallery extending in a cylinder column direction is formed at the cylinder block. A first communication passage through which the main gallery and the upstream oil supply passage communicate with each other is formed at the wall portion of the cylinder block and the wall portion of the oil pan.

Oil supply device of engine, method of manufacturing engine, and oil supply passage structure of engine

Disclosed herein is an oil supply device for an internal combustion engine, which includes a control unit that controls activation of an electric oil pump and that functions as either a reserve oil level estimator for estimating the level of oil reserved in auxiliary chambers or a reserve oil level detector for detecting the level of the oil reserved there. When it is estimated or detected that the level of the oil reserved in the auxiliary chambers has become equal to or less than a predetermined reserve oil level while the internal combustion engine is OFF, the control unit performs an oil replenishment control to replenish the auxiliary chambers with the oil by activating the electric oil pump.

Oil supply device of internal combustion engine

An engine oil supply apparatus includes: an oil pump; an oil supply path which supplies oil to a hydraulic operating section of an engine; an oil cooler which is provided on the oil supply path and which cools oil discharged from the oil pump; and a control apparatus which sets a required oil pressure required from the hydraulic operating section in accordance with an operation state of the engine, as a target oil pressure, and controls the discharge amount of the oil pump so that an oil pressure inside the oil supply path equals the target oil pressure. The control apparatus controls the oil pump so that, during an operation state of the engine where the oil enters a prescribed high oil temperature state, the oil is discharged in an amount exceeding a discharge amount corresponding to the required oil pressure of the hydraulic operating section.

Engine oil supply apparatus

An oil supply apparatus includes: an oil pump; a main oil supply path; a sub oil supply path connected to the main oil supply path; a first oil supply section which is connected to the main oil supply path and which supplies oil to a crank bearing section of a specific crank journal; a second oil supply section which is connected to the sub oil supply path and which supplies oil to a crank bearing section of a crank journal other than the specific crank journal; and a control apparatus which sets, as a target oil pressure, a highest required oil pressure among required oil pressures required from a plurality of hydraulic operating sections in accordance with an operation state of the engine, and which controls the discharge amount of the oil pump so that an oil pressure detected by an oil pressure sensor equals the target oil pressure.

An oil pump device includes an oil pump () and an electrically operated control valve (). The valve adjusts hydraulic pressures to be applied to a decrease-side control pressure chamber (A) for causing a pump casing () to swing in the discharge amount decrease direction and an increase-side control pressure chamber (B) for causing the pump casing to swing in the discharge amount increase direction so as to hold the pump casing at a predetermined approximately intermediate position between the maximum swing position in the discharge amount decrease direction and the maximum swing position in the discharge amount increase direction by balancing the urging forces of a decrease-side return spring () for urging the pump casing in the discharge amount decrease direction and an increase-side return spring () for urging the pump casing in the discharge amount increase direction when supply of current to the valve is stopped.

Oil pump device

An auxiliary machine drive device for an engine includes a fuel pump including first and second sprockets mounted on a rear end surface of an engine body; a starter disposed below the fuel pump; a drive sprocket and a crankshaft sprocket fixed to a crankshaft; an oil pump including an oil pump sprocket disposed below the drive sprocket; an intake camshaft including an intake camshaft sprocket, and disposed on the upper side of the engine body than the fuel pump; a balancer drive shaft including a balancer shaft sprocket disposed on the exhaust side than the crankshaft and below the crankshaft; a first chain wound between the crankshaft sprocket and a first sprocket; a second chain wound between the intake camshaft sprocket and a second sprocket: and a third chain wound between the drive sprocket, the oil pump sprocket, and the balancer shaft sprocket.

Growing community of inventors

Aki-gun, Japan

Kenta Honda