公开(公告)号：US20200208552A1

公开(公告)日：2020-07-02

申请号：US16658935

申请日：2019-10-21

Applicant: KUBOTA Corporation

Inventor： Satoshi SUGIMOTO ,  Yusuke KOMEMUSHI ,  Shinya ASADA ,  Takayasu OGUSHI

IPC: F01M13/00 ,  F01M13/04

Abstract: An engine is provided where oil is minimally blown off through a breather chamber. The breather chamber includes a plurality of breather inlet chambers each having a breather inlet which opens on a bottom wall; an oil separation chamber where blow-by gases flown out from the breather inlet chambers merge together and oil separation is performed; and a breather outlet. A ceiling wall of each breather inlet chamber is lower than a ceiling wall of an oil separation chamber. It is preferable that the respective breather inlet chambers each have: a remote-side chamber portion disposed remote from the oil separation chamber and a near-side chamber portion disposed near to the oil separation chamber. A ceiling wall of the near-side chamber portion is disposed lower than a ceiling wall of the remote-side chamber portion with a stepped portion formed between the ceiling wall and the ceiling wall.

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：US20150089925A1

公开(公告)日：2015-04-02

申请号：US14477968

申请日：2014-09-05

Applicant: KUBOTA Corporation

Inventor： Kentarou KITA ,  Tamotsu KUNO ,  Katsushi INOUE ,  Yuuji TAKEMURA ,  Yuuki ISHII ,  Yusuke KOMEMUSHI ,  Tomoya HASEGAWA

IPC: F01N3/025 ,  F01N9/00

CPC classification number: F01N9/002 ,  F01N3/023 ,  F01N2430/06 ,  F01N2430/085 ,  F01N2430/10 ,  F01N2550/04 ,  F01N2900/0408 ,  F01N2900/1404 ,  F01N2900/1602 ,  F01N2900/1606 ,  F02D41/0002 ,  F02D41/025 ,  F02D41/029 ,  F02D41/1446 ,  F02D2011/102 ,  F02D2200/0802 ,  F02D2200/0812 ,  Y02T10/26 ,  Y02T10/42 ,  Y02T10/47

Abstract: The present invention provides a diesel engine capable of preventing a PM accumulation amount from increasing excessively. If DOC inlet exhaust gas temperature (“IEGT”) does not reach a predetermined value T0, a control unit carries out air intake amount feedback control (“AIAFC”), and a target value of intake throttling is set to a predetermined air intake amount. If the DPF regenerating processing is not started even if elapsed time reaches a predetermined value t after AIAFC is started in a state where the DOC IEGT does not reach the predetermined value T0, the control unit changes AIAFC to exhaust gas temperature feedback control (“EGTFC”). In EGTFC, the control unit changes a target value of intake throttling to a predetermined DOC IEGT T0. If application of a load exceeding a predetermined amount is detected before the DOC IEGT reaches the predetermined value T0, the control unit returns EGTFC to AIAFC.

Abstract translation: 本发明提供一种能够防止PM堆积量过度增加的柴油发动机。 如果DOC入口排气温度（“IEGT”）未达到预定值T0，则控制单元执行进气量反馈控制（“AIAFC”），将进气节流的目标值设定为预定的进气量 。 即使在DOCIEGT未达到规定值T0的状态下AIAFC开始后经过时间达到规定值t，DPF再生处理也不开始，控制部将AIAFC变更为排气温度反馈控制（“EGTFC “）。 在EGTFC中，控制单元将进气节流的目标值改变为预定的DOC IEGT T0。 如果在DOC IEGT达到预定值T0之前检测到超过预定量的负载的应用，则控制单元将EGTFC返回到AIAFC。

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.