Heat exchanger for vehicle

Patent metadata

Field	Value
Publication number	US-2018058766-A1
Application number	US-201715687026-A
Country	US
Kind code	A1
Filing date	Aug 25, 2017
Priority date	Aug 29, 2016
Publication date	Mar 1, 2018
Grant date	—

Abstract

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.

First claim

What is claimed is:

1 . A heat exchanger for a vehicle,
the vehicle including a power train that is configured such that an engine coolant, an engine oil and a transmission oil flow through the power train and that a flow rate of the engine oil and a flow rate of the transmission oil are different from each other, the heat exchanger comprising: a first flow passage through which the engine coolant flows; a second flow passage through which the engine oil flows; and a third flow passage through which the transmission oil flows, the first flow passage, the second flow passage and the third flow passage being compartmentalized through lamination of a plurality of plates, the heat exchanger being configured such that heat exchange is carried out between the respective flow passages that are adjacent to each other in a lamination direction of the plurality of the plates, and the heat exchanger including 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.

2 . The heat exchanger according to claim 1 , wherein
the power train is configured such that the flow rate of the transmission oil is lower than the flow rate of the engine oil, and the heat exchanger includes a first region and a second region such that the first region includes at least one flow passage group in which the first flow passage, the third flow passage and the first flow passage are sequentially adjacent to one another, and a region where the first flow passage is adjacent only to the third flow passage, and that the second region includes at least one flow passage group in which the second flow passage, the third flow passage, the second flow passage, the first flow passage and the second flow passage are sequentially adjacent to one another, and the first region and the second region are adjacent to each other in the lamination direction.

3 . The heat exchanger according to claim 1 , wherein
the power train is configured such that a flow rate of the engine oil is lower than a flow rate of the transmission oil, and the heat exchanger includes a first region and a second region such that the first region includes at least one flow passage group in which the first flow passage, the second flow passage and the first flow passage are sequentially adjacent to one another, and a region where the first flow passage is adjacent only to the second flow passage, and that the second region includes at least one flow passage group in which the third flow passage, the second flow passage, the third flow passage, the first flow passage and the third flow passage are sequentially adjacent to one another, and the first region and the second region are adjacent to each other in the lamination direction.

4 . The heat exchanger according to claim 1 , wherein
the power train is configured such that a flow rate of the transmission oil is lower than a flow rate of the engine oil, the heat exchanger includes a first region, a second region and a third region such that the first region includes at least one flow passage group in which the first flow passage, the third flow passage and the first flow passage are sequentially adjacent to one another, and a region where the first flow passage is adjacent only to the third flow passage, that the second region includes at least one flow passage group in which the third flow passage, the second flow passage and the third flow passage are sequentially adjacent to one another, and that the third region includes at least one flow passage group in which the second flow passage, the first flow passage and the second flow passage are sequentially adjacent to one another, and the first region, the second region and the third region are adjacent to one another in the lamination direction in a sequence of the first region, the third region and the second region.

5 . The heat exchanger according to claim 2 , wherein
the third flow passage that is included in the second region is located upstream of the third flow passage that is included in the first region, in a flow direction of the transmission oil flowing through the heat exchanger.

6 . The heat exchanger according to claim 3 , wherein
the third flow passage that is included in the second region is located upstream of the third flow passage that is included in the first region, in a flow direction of the transmission oil flowing through the heat exchanger.

7 . The heat exchanger according to claim 4 , wherein
the third flow passage that is included in the second region is located upstream of the third flow passage that is included in the first region, in a flow direction of the transmission oil flowing through the heat exchanger.

8 . The heat exchanger according to claim 1 , wherein
the plates that constitute the first flow passage, the second flow passage and the third flow passage are provided with inflow holes and outflow holes for the engine coolant, the engine oil and the transmission oil respectively, such that flow directions of fluids flowing through adjacent ones of the flow passages are opposed to each other.

9 . The heat exchanger according to claim 6 , wherein
the inflow holes and the outflow holes are provided respectively through the plates at such positions that a straight line joining the inflow and outflow holes of the second flow passage to each other and a straight line joining the inflow and outflow holes of the third flow passage to each other intersect with each other.

Assignees

• Toyota Motor Co Ltd
• Mahle Filter Systems Jp Corp

Inventors

• Tokozakura Daisuke
• Shiina Takahiro
• Tominaga Satoshi
• Ooi Naoki
• Isoda Katsuhiro

Classifications

• F28D1/00 Primary

  Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators (F28D5/00 takes precedence) · CPC title

• F28D9/005

  the plates having openings therein for both heat-exchange media · CPC title

• F28D2021/0089

  Oil coolers · CPC title

• F28D9/0093 Primary

  Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids · CPC title

• F01M5/002

  Cooling · CPC title