US 12,473,967 B2
Oil cooler
Naoki Marukawa, Susono (JP); and Hiroto Kusaka, Susono (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Jan. 9, 2023, as Appl. No. 18/094,445.
Claims priority of application No. 2022-037449 (JP), filed on Mar. 10, 2022.
Prior Publication US 2023/0287973 A1, Sep. 14, 2023
Int. Cl. F16H 57/04 (2010.01); B60K 1/00 (2006.01); F16H 57/02 (2012.01); H02K 5/20 (2006.01); H02K 9/19 (2006.01); H02K 11/33 (2016.01)
CPC F16H 57/0415 (2013.01) [F16H 57/0476 (2013.01); H02K 5/203 (2021.01); H02K 9/19 (2013.01); H02K 11/33 (2016.01); B60K 2001/006 (2013.01); F16H 2057/02034 (2013.01); F16H 2057/02052 (2013.01)] 3 Claims
OG exemplary drawing
 
1. An oil cooler for cooling an oil with a cooling water, the oil being for lubricating a transaxle in a state of being attached to a case for accommodating the transaxle, the oil cooler comprising:
an oil inlet opening on a mounting surface attached to the case;
an oil outlet opening on the mounting surface;
a first opening, which is an opening on the mounting surface, for cooling water; and
a second opening, which is an opening on a portion other than the mounting surface, for cooling water, wherein
a heat exchange is performed between the oil flowing through an oil passage connecting the oil inlet opening and the oil outlet opening and the cooling water flowing through a water passage connecting the first opening and the second opening,
the case houses a motor, a PCU, which is a power conversion device for controlling the motor, and the transaxle,
the oil inlet opening is connected to an oil supply port provided on the case,
the oil outlet opening is connected to an oil return port provided on the case,
the oil is supplied to a motor chamber accommodating the motor in an internal space of the case to cool the motor,
the PCU is provided with a cooling flow path for passing the cooling water,
the cooling flow path is in communication with the first opening via a case water channel formed in the case,
the first opening is connected to a cooling water supply port formed on the case and is in communication with the cooling flow path via the cooling water supply port and the case water channel,
the cooling water is supplied to the PCU to cool the PCU, and
the second opening is open to a side opposite to the mounting surface and is connected to a member other than the case.