Mazda Motor Corporation

Sakumi Haseto

Masaaki Sato

Tatsuhiko Iwasaki

Satoshi Imamura

Masanori Hashimoto

Ichiro Hirose

Naoki Nagano

Akihiro Noda

Shinichi Hikitani

Yuma Yamaga

Kazuo Isayama

Yoshiyuki Yamashita

Hisayuki Yamane

Kunihiro Nishi

Michiyuki Miura

Yukio Jo

Ichirou Hirose

Chiaki Kato

Kazuya Ito

Shunsuke Fukuda

Naohiro Koi

Eiji Wada

Nobuhiko Tanaka

Aoi Oizumi

A cooling device for a vehicle is provided, which includes a first coolant channel through which a first coolant for cooling an engine flows, a second coolant channel through which a second coolant for cooling a motor drive flows, and an oil channel through which oil for lubricating inside a transmission flows. The oil channel includes a first heat exchanger configured to exchange heat between the first coolant and the oil, a second heat exchanger configured to exchange heat between the second coolant and the oil, and a valve configured to adjust a first flow rate of the oil circulating through the first heat exchanger and a second flow rate of the oil circulating through the second heat exchanger.

Cooling device for vehicle

An oil pump unit comprises a pump shaft and a pump housing which stores the pump shaft. A balancer unit comprises a pair of balancer shafts and a balancer housing which stores the balancer shafts. The pump housing and the balancer housing are coupled to each other at least in the vicinity of a periphery of the pump shaft, and at a coupling portion in the vicinity of the periphery of a power transmission shaft is formed a connection groove which connects the inside to the inside of the coupling portion. Accordingly, it can be retrained that the reliability of journal portions of the balancer shaft of the balancer unit and the like is deteriorated by dusts and the like contained in high-pressure oil from the oil pump unit in a balancer device of an engine.

Balancer device of engine

An engine balancer includes a pair of balancer shafts and a balancer housing for housing the balancer shafts, and is placed in an oil pan at the bottom of an engine. The balancer housing includes a pair of front and rear bearing walls respectively supporting the balancer shafts with rolling bearings interposed therebetween. The bearing walls of the balancer housing are attached to bearing walls for a crankshaft. The housing body has an aperture at the top thereof. The aperture of the housing body is covered with a plate-shaped cover member thinner than a member forming the housing body.

Engine balancer

A first balancer shaft includes a shaft extension portion extending forward, to which a driven sprocket is attached. A case member includes a first bearing portion supporting the balancer shaft near its weight portions and rotational gear and a second bearing portion supporting the same near its driven sprocket. The case member includes an upper case coupled to a cylinder block and a lower case facing to the upper case, and there is provided a case extension portion extending forward at the upper case. The first bearing portion is configured of a hole formed by half-split portions of the both cases and the second bearing portion is configured of a hole formed integrally at the case extension portion.

A balancer shaft apparatus efficiently prevent oil from being stirred in the oil pan and from being splashed into the cylinder block during the balancer-shaft rotation. Oil in a housing of the balancer shaft is discharged from a drainage hole formed at such a location above an oil level as to contact a base serving as a bearing beam of a crankshaft supporting member. The discharged oil hits inner surfaces of a recess formed on the lower portion of the crankshaft supporting member to form oil drops, returning to an oil pan. The housing is provided with guide passages connecting the drainage holes to a space in which the balancer shaft is disposed for draining the oil. These guide passages are formed with tapered guide surfaces for orienting the oil towards the lower portions of the crankshaft supporting member while splashed oil caused by the balancer-shaft rotation is drained through the drainage holes.

Balancer shaft apparatus for an engine

Growing community of inventors

Hiroshima, Japan

Sakumi Haseto