Mahle Filter Systems Japan Corporation

Toyota Jidosha Kabushiki Kaisha

Naoki Ooi

Takahiro Shiina

Daisuke Tokozakura

Satoshi Tominaga

Katsuhiro Isoda

Hirokazu Watanabe

An oil cooler includes flat tubes layered together with a clearance, wherein cooling water flows through the clearance. Each flat tube includes a first plate, a second plate, and a fin plate held between the first plate and the second plate. The first plate is recessed to form a fin plate accommodation portion accommodating the fin plate, wherein a thin portion is formed outside of the fin plate accommodation portion in a longitudinal direction of the flat tube. An oil port is provided at the thin portion. Each flat tube includes a guide wall at a lateral periphery thereof, wherein the guide wall faces the oil port in a width direction, and projects in a layering direction. The guide wall, the thin portion, and a lateral wall of the oil port form a nozzle portion to guide cooling water in the longitudinal direction.

Oil cooler

A heat exchanger for a vehicle is mounted in a vehicle having a power train through which an engine coolant, an engine oil and a transmission oil flow and in which a flow rate of the engine oil and a flow rate of the transmission oil are different from each other. A first flow passage for causing the engine coolant to flow, a second flow passage for causing the engine oil to flow, and a third flow passage for causing the transmission oil to flow are formed through lamination of a plurality of plates. The heat exchanger includes a region where the first flow passage is adjacent only to that one of the second flow passage and the third flow passage through which a fluid flows at lower flow rate.

Heat exchanger for vehicle

Growing community of inventors

Kawagoe, Japan

Naoki Ooi