Heat exchanging device

Patent metadata

Field	Value
Publication number	US-10234016-B2
Application number	US-201615196396-A
Country	US
Kind code	B2
Filing date	Jun 29, 2016
Priority date	Aug 6, 2015
Publication date	Mar 19, 2019
Grant date	Mar 19, 2019

Abstract

A heat exchanging device includes: a heat exchanger configured to perform heat exchange between first operating oil used in an engine and second operating oil used in a fluid transmitting device and an automatic transmission; and a heat exchanging amount decreasing unit configured to, when a temperature of the second operating oil is lower than a predetermined temperature at which it is allowed to engage a lock-up mechanism, decrease a flow amount of at least one of the first and second operating oil flowing in the heat exchanger as compared to a case in which the temperature of the second operating oil is not lower than the predetermined temperature.

First claim

What is claimed is:

1. A heat exchanging device mounted on a vehicle provided with an engine, a fluid transmitting device including a lock-up mechanism, and an automatic transmission connected to the engine through the fluid transmitting device, comprising:
a heat exchanger configured to perform heat exchange between first operating oil used in the engine and second operating oil used in the fluid transmitting device and the automatic transmission; and
a heat exchanging amount decreasing unit configured to, when a temperature of the second operating oil is lower than a predetermined temperature at which it is allowed to engage the lock-up mechanism, decrease a flow amount of at least one of the first and second operating oil flowing in the heat exchanger as compared to a case in which the temperature of the second operating oil is not lower than the predetermined temperature.

2. The heat exchanging device according to claim 1 , wherein
the heat exchanging amount decreasing unit includes a switching valve configured to selectively switch between blockage and opening of a heat exchanging route in which the second operating oil flowing out of the automatic transmission flows through the heat exchanger to return to the automatic transmission, and
the switching valve is configured to:
block the heat exchanging route when the temperature of the second operating oil is lower than the predetermined temperature; and
open the heat exchanging route when the temperature of the second operating oil is not lower than the predetermined temperature.

3. The heat exchanging device according to claim 1 , wherein
the heat exchanging amount decreasing unit includes a first operating oil switching valve configured to selectively switch between blockage and opening of a first operating oil heat exchanging route in which the first operating oil flowing out of the engine flows through the heat exchanger to return to the engine, and
the first operating oil switching valve is configured to:
block the first operating oil heat exchanging route when the temperature of the second operating oil is lower than the predetermined temperature; and
open the first operating oil heat exchanging route when the temperature of the second operating oil is not lower than the predetermined temperature.

4. The heat exchanging device according to claim 2 , wherein
the heat exchanging amount decreasing unit includes a first operating oil switching valve configured to selectively switch between blockage and opening of a first operating oil heat exchanging route in which the first operating oil flowing out of the engine flows through the heat exchanger to return to the engine, and
the first operating oil switching valve is configured to:
block the first operating oil heat exchanging route when the temperature of the second operating oil is lower than the predetermined temperature; and
open the first operating oil heat exchanging route when the temperature of the second operating oil is not lower than the predetermined temperature.

Assignees

• Toyota Motor Co Ltd

Inventors

• Shiina Takahiro
• Tokozakura Daisuke
• Arakawa Kazuya

Classifications

• F16H57/0417 Primary

  Heat exchangers adapted or integrated in the gearing · CPC title

• F28F2250/08

  Fluid driving means, e.g. pumps, fans · CPC title

• F28F27/02

  for controlling the distribution of heat-exchange media between different channels ({static flow control means in header boxes F28F9/026}; arrangements of guide plates or guide vanes F28F9/22, F28F25/12) · CPC title

• F28D15/00

  Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls {; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies (F28D17/00, F28D19/00, F28D20/00 take precedence)} · CPC title

• F28D2021/0089

  Oil coolers · CPC title