公开(公告)号：US10060325B2

公开(公告)日：2018-08-28

申请号：US14842988

申请日：2015-09-02

Applicant: KUBOTA Corporation

Inventor： Kentaro Nagai ,  Hiroshi Kuwasaki ,  Tadashi Nakano ,  Takahito Hamasaki ,  Yoshinori Tanaka ,  Masaya Mori

IPC: F01P3/02 ,  F02F1/40 ,  F01P11/04 ,  F02F1/14 ,  F02F1/42 ,  F02M35/10 ,  F02M35/104

CPC classification number: F01P3/02 ,  F01P11/04 ,  F01P2003/021 ,  F01P2003/024 ,  F02F1/14 ,  F02F1/40 ,  F02F1/4285 ,  F02M35/10091 ,  F02M35/104

Abstract: There is provided a cylinder head cooling apparatus of an engine capable of enhancing cooling efficiency around an auxiliary combustion chamber wall. The cylinder head cooling apparatus of an engine including a cylinder head having therein an intake port, an exhaust port, an auxiliary combustion chamber, and a cooling water jacket, in which an intake port wall, an exhaust port wall, and an auxiliary combustion chamber wall are placed in the cooling water jacket, the cooling water jacket includes a cooling water inlet and a cooling water outlet, engine cooling water flowed from the cooling water inlet into the cooling water jacket flows out from the cooling water outlet through the cooling water jacket, wherein a cooling water guide wall is provided upstream of the auxiliary combustion chamber wall in a cooling water passing path of the cooling water jacket, and the upstream cooling water guide wall is formed into a shape whose width gradually widens toward a downstream side.

公开(公告)号：US09771854B2

公开(公告)日：2017-09-26

申请号：US14842520

申请日：2015-09-01

Applicant: KUBOTA Corporation

Inventor： Naoya Sakurai ,  Hideyuki Koyama ,  Hideyuki Goto ,  Kentaro Nagai ,  Tadashi Nakano

IPC: F02F1/10 ,  F02F1/14 ,  F01P5/10 ,  F02F1/36 ,  F01P7/16 ,  F01P5/12 ,  F01P11/04 ,  F01P1/06 ,  F01P5/02 ,  F01P3/02

CPC classification number: F01P7/16 ,  F01P1/06 ,  F01P3/02 ,  F01P5/02 ,  F01P5/10 ,  F01P5/12 ,  F01P11/04 ,  F01P2003/024 ,  F01P2003/025

Abstract: There is provided an engine water-cooling device that can increase warming-up efficiency of an engine. The engine water-cooling device includes a thermostat housing that houses a thermostat. The thermostat housing is mounted to a front wall of a cylinder head in one side portion in a width direction of the cylinder head. A cooling water pump is mounted to a front wall of a cylinder block in a central portion in a width direction of the cylinder block. A bypass passage includes an intra-head bypass passage in the cylinder head, and the intra-head bypass passage includes a width-direction passage portion extending from a position behind the thermostat housing to a position behind and above the cooling water pump.