公开(公告)号：US20200256279A1

公开(公告)日：2020-08-13

申请号：US16859554

申请日：2020-04-27

Applicant: KUBOTA Corporation

Inventor： Satoshi SUGIMOTO ,  Yusuke KOMEMUSHI ,  Naoki WADA

IPC: F02F1/40 ,  F01P3/02 ,  F01P3/14 ,  F02F1/24 ,  F02F1/38 ,  F01P3/16 ,  F02F1/42

Abstract: There is provided a water cooled engine including a cylinder head with minimized thermal strain.A head water jacket includes an inter-exhaust-port-wall water channel between a first exhaust entrance port wall and a second exhaust entrance port wall. A cylinder head includes a cooling water injection passage provided at a bottom wall of the cylinder head. The cooling water injection passage is positioned on the exhaust end side, and includes a passage entrance provided on the exhaust end side, and a passage exit directed toward the inter-exhaust-port-wall water channel. An exhaust port wall includes a heat dissipation fin extending from a first exhaust entrance port wall toward an exhaust end. The space between the heat dissipation fin and a second exhaust entrance port wall forms a water channel entrance of the inter-exhaust-port-wall water channel.

公开(公告)号：US20190003416A1

公开(公告)日：2019-01-03

申请号：US15987980

申请日：2018-05-24

Applicant: KUBOTA Corporation

Inventor： Satoshi SUGIMOTO ,  Yusuke KOMEMUSHI ,  Naoki WADA

IPC: F02F1/40 ,  F02F1/42

Abstract: A water cooled engine is provided, including a cylinder head with minimized thermal strain. A head water jacket includes an inter-exhaust-port-wall water channel between a first exhaust entrance port wall and a second exhaust entrance port wall. The cylinder head includes a cooling water injection passage provided at a bottom wall thereof. The cooling water injection passage is positioned on the exhaust end side, and includes a passage entrance provided on the exhaust end side, and a passage exit directed toward the inter-exhaust-port-wall water channel. An exhaust port wall includes a heat dissipation fin extending from a first exhaust entrance port wall toward an exhaust end. The space between the heat dissipation fin and a second exhaust entrance port wall forms a water channel entrance of the inter-exhaust-port-wall water channel.