公开(公告)号：US10982576B2

公开(公告)日：2021-04-20

申请号：US16410280

申请日：2019-05-13

Applicant: KUBOTA Corporation

Inventor： Hiroki Oso ,  Akira Tanaka ,  Hideyuki Koyama ,  Rina Kaneko ,  Nobuyoshi Okada

IPC: F01M13/04 ,  F02M35/04 ,  F02M35/10

Abstract: In an engine that includes a blow-by-gas returning system configured to direct blow-by gas within a crankcase to an intake system through an inside of a head cover, the intake system includes a cover intake-passage disposed at a blow-by-gas outlet of the head cover, and the cover intake-passage communicates with a blow-by-gas passage of the blow-by-gas outlet.

公开(公告)号：US10669903B2

公开(公告)日：2020-06-02

申请号：US15618226

申请日：2017-06-09

Applicant: KUBOTA Corporation

Inventor： Hiroki Oso ,  Hideyuki Koyama ,  Hideyuki Goto ,  Takahiro Yamazaki ,  Kentaro Nagai ,  Takashi Yamaguchi ,  Rina Kaneko

IPC: F01M11/02 ,  F01M5/00 ,  F02F7/00 ,  F16H57/04 ,  F02B67/06 ,  F01M1/02 ,  F02B67/04

Abstract: An oil cooling structure of an engine is provided that is capable of enhancing cooling performance of oil while preventing an increase in number of components or an increase in required space from being involved as much as possible. In an oil cooling structure of an engine in which a transmission case is attached to one end wall of an engine body, and a transmission mechanism for an accessory drive is provided in the transmission case, the transmission case is formed into a potlid-shaped body having a plurality of rib walls along a front-rear direction, and is attached to an engine front wall with an engine cooling fan, and case inner chamber portions partitioned by the rib walls in the transmission case are configured as a transporting passage of oil circulated by an oil pump.

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.