Power train

Patent metadata

Field	Value
Publication number	US-2018230901-A1
Application number	US-201815894383-A
Country	US
Kind code	A1
Filing date	Feb 12, 2018
Priority date	Feb 14, 2017
Publication date	Aug 16, 2018
Grant date	—

Abstract

A power train includes an engine including an engine case; a transmission including a transmission case that is fastened to the engine case; an electric motor provided inside the transmission case; and a heat insulator provided between the engine case and the transmission case, and being lower than thermal conductivity of the engine case and thermal conductivity of the transmission case.

First claim

What is claimed is:

1 . A power train comprising:
an engine including an engine case; a transmission including a transmission case that is fastened to the engine case; an electric motor provided inside the transmission case; and a heat insulator provided between the engine case and the transmission case, and being lower than thermal conductivity of the engine case and thermal conductivity of the transmission case.

2 . The power train according to claim 1 , further comprising:
a crankshaft provided in the engine; a flywheel connected with the crankshaft; and a damper connected with the flywheel.

3 . The power train according to claim 1 , wherein the engine includes a water jacket provided inside the engine case, the heat insulator is provided in a part lower than a lower end of the water jacket along a vertical direction of the engine case.

4 . The power train according to claim 1 , wherein the heat insulator includes a first heat insulator, the first heat insulator is provided between the engine case and the transmission case.

5 . The power train according to claim 2 , wherein the heat insulator includes a second heat insulator, the second heat insulator is provided on a first confronting surface of the engine case, the first confronting surface faces the flywheel.

6 . The power train according to claim 2 , wherein:
the heat insulator includes a third heat insulator configured to integrate a first heat insulator with a second heat insulator; the first heat insulator is provided between the engine case and the transmission case; and the second heat insulator is provided on a first confronting surface of the engine case, the first confronting surface faces the flywheel.

7 . The power train according to claim 2 , wherein the heat insulator includes a forth heat insulator, the forth heat insulator is provided on a second confronting surface of the transmission case, which faces the crankshaft, the flywheel, and the damper.

8 . The power train according to claim 2 , wherein:
the heat insulator includes a fifth heat insulator configured to integrate a first heat insulator with a forth heat insulator; first heat insulator is provided between the engine case and the transmission case; and the forth heat insulator is provided on a second confronting surface of the transmission case, which faces the crankshaft, the flywheel, and the damper.

Assignees

• Toyota Motor Co Ltd

Inventors

• Tominaga Satoshi
• Tokozakura Daisuke
• Shiina Takahiro

Classifications

• F16H57/025

  Support of gearboxes, e.g. torque arms, or attachment to other devices · CPC title

• F02B77/11 Primary

  Thermal or acoustic insulation · CPC title

• Y10S903/902

  Prime movers comprising electrical and internal combustion motors · CPC title

• F02B61/04 Primary

  for driving propellers · CPC title

• B60Y2200/92

  Hybrid vehicles · CPC title