公开(公告)号：US11078872B2

公开(公告)日：2021-08-03

申请号：US16202209

申请日：2018-11-28

Applicant: KUBOTA Corporation

Inventor： Yoshikazu Takemoto ,  Hideyuki Goto ,  Takahito Hamasaki ,  Kentaro Nagai ,  Tomoya Akitomo ,  Kumiko Sakaguchi

IPC: F02M26/22 ,  F02M26/41 ,  F02M26/13 ,  F28D7/10 ,  F02M26/11 ,  F28D21/00 ,  F28F1/06 ,  F28F1/02 ,  F01P3/20

Abstract: An engine with an EGR device includes an engine case, and an EGR pipe that introduces an EGR gas into an intake path. The EGR pipe is arranged to pass through an inside of the engine case. A part of the EGR pipe in the engine case is arranged to face a cooling water path in the engine case. The engine case is defined by a cylinder head. The cooling water path is arranged to surround a whole circumference of the EGR pipe.

公开(公告)号：US10941684B2

公开(公告)日：2021-03-09

申请号：US16683394

申请日：2019-11-14

Applicant: KUBOTA Corporation

Inventor： Kentaro Nagai ,  Takahiro Yamazaki ,  Reo Yoshida ,  Tomoya Akitomo ,  Shoichi Okimi

IPC: F01M13/00 ,  F02B75/20 ,  F02M25/06

Abstract: A cylinder head cover that prevents the gas outlet for the blow-by gas from being cooled by structural improvements so that the gas outlet does not freeze or become clogged in a cold condition. A cylinder head cover includes: a gas passage through which blow-by gas from a crankcase passes; and a gas outlet portion protruding upward from a head cover upper wall. The gas outlet portion includes a protruding case portion bulging upward from the head cover upper wall so as to form an outlet passage through which blow-by gas passes, and an air layer is formed outside the outlet passage in the protruding case portion.

公开(公告)号：US09416704B2

公开(公告)日：2016-08-16

申请号：US14478425

申请日：2014-09-05

Applicant: KUBOTA Corporation

Inventor： Yuichi Tamaki ,  Yoshikazu Takemoto ,  Takashi Onishi ,  Mitsugu Okuda ,  Tomoya Akitomo

IPC: B01D50/00 ,  F01N3/025

CPC classification number: F01N3/0253 ,  F01N2240/12

Abstract: It is an object of the present invention to provide an exhaust gas treatment device of an engine capable of preventing matching surfaces of catalyst portions configuring a combustible gas catalyst from being thermally damaged. In the exhaust gas treatment device, combustible gas is produced by combustible gas generating catalyst, exhaust gas heated by combustion of combustible gas is supplied to an exhaust gas treatment portion, the combustible gas generating catalyst comprises an aggregate of a plurality of catalyst portions, each of the catalyst portions includes a matching surface with respect to adjacent one of the catalyst portions, a fastening ring is fitted over the combustible gas generating catalyst in which the matching surfaces of the adjacent catalyst portions are abutted against each other, and the matching surfaces of the adjacent catalyst portions are brought into tight contact with each other by a fastening force of the fastening ring.

Abstract translation: 本发明的目的是提供一种能够防止构成可燃气体催化剂的催化剂部分的匹配表面被热损坏的发动机的废气处理装置。 在废气处理装置中，通过可燃性气体发生催化剂生成可燃性气体，通过可燃性气体的燃烧而加热的废气被供给到排气处理部，该可燃性气体发生催化剂由多个催化剂部分的集合体构成， 的催化剂部分包括相对于相邻的催化剂部分的匹配表面，紧固环装配在可燃气体发生催化剂上，相邻催化剂部分的匹配表面彼此抵接，并且匹配表面 相邻的催化剂部分通过紧固环的紧固力彼此紧密接触。

公开(公告)号：US09765671B2

公开(公告)日：2017-09-19

申请号：US14196540

申请日：2014-03-04

Applicant: KUBOTA Corporation

Inventor： Hideyuki Koyama ,  Tomoya Akitomo ,  Yuichi Tamaki ,  Ryutaro Komura

IPC: F01N3/10 ,  F01N3/38 ,  F01N3/20 ,  F01N3/025 ,  F01N3/035 ,  F01N13/00 ,  F23G7/06 ,  F23G7/07 ,  F23Q7/06

CPC classification number: F01N3/38 ,  F01N3/025 ,  F01N3/035 ,  F01N3/2033 ,  F01N13/0097 ,  F01N2240/14 ,  F01N2260/022 ,  F23G7/065 ,  F23G7/07 ,  F23Q7/06 ,  Y02T10/26

Abstract: An engine exhaust treatment apparatus, which suppresses thermal damage to an electrothermal ignition apparatus, includes: an exhaust passage; an oxidation catalyst disposed in the exhaust passage; a combustible gas generator; a combustible gas supplying passage; a heat dissipation port opened upstream in the exhaust passage from the oxidation catalyst and in a downstream part of the combustible gas supplying passage, the exhaust passage and the combustible gas supplying passage communicating with each other through the heat dissipation port; and an electrothermal ignition apparatus disposed in the combustible gas supplying passage. Heat of flaming combustion of the combustible gas ignited by the electrothermal ignition apparatus is supplied to the exhaust passage, to raise the temperature of exhaust in the exhaust passage. A heat dissipation plate is attached to an outer projecting portion of the electrothermal ignition apparatus. The outer projecting portion projects outside a wall of the exhaust treatment apparatus.

公开(公告)号：US09518490B2

公开(公告)日：2016-12-13

申请号：US14641577

申请日：2015-03-09

Applicant: KUBOTA Corporation

Inventor： Katsuaki Arai ,  Takashi Onishi ,  Yoshikazu Takemoto ,  Tomoya Akitomo

IPC: B01D50/00 ,  F01N3/20 ,  F01N3/36 ,  F01N3/38 ,  F01N9/00 ,  F01N13/00 ,  F01N3/025 ,  F01N3/035 ,  F01N3/10

CPC classification number: F01N3/2006 ,  F01N3/0256 ,  F01N3/035 ,  F01N3/103 ,  F01N3/36 ,  F01N3/38 ,  F01N9/002 ,  F01N13/008 ,  F01N13/0097 ,  F01N2240/14 ,  F01N2240/16 ,  F01N2560/06 ,  F01N2560/08 ,  F01N2560/14 ,  F01N2610/04 ,  F01N2610/107 ,  Y02T10/26 ,  Y02T10/47

Abstract: An exhaust gas processing device for an engine, capable of securely warming a combustion catalyst, is provided. A combustion catalyst burning gas is produced when a warming end condition for the combustion catalyst is established, which signifies the establishment of either one of a first condition or a second condition. In the first condition, an inlet temperature of a combustion catalyst is equal to or higher than an activation requirement temperature of the combustion catalyst, and further, an outlet temperature of the combustion catalyst is equal to or higher than an activation confirmation temperature of the combustion catalyst in excess of the inlet temperature of the combustion catalyst. In the second condition, the outlet temperature of the combustion catalyst exceeds a warming confirmation temperature of the combustion catalyst that is set to be higher as an engine speed is lower, for a predetermined period of time.

Abstract translation: 提供一种能够可靠地加热燃烧催化剂的用于发动机的废气处理装置。 当建立用于燃烧催化剂的加热结束条件时，产生燃烧催化剂燃烧气体，这表示建立第一条件或第二条件中的任一个。 在第一条件下，燃烧催化剂的入口温度等于或高于燃烧催化剂的活化要求温度，此外，燃烧催化剂的出口温度等于或高于燃烧的活化确认温度 催化剂超过燃烧催化剂的入口温度。 在第二条件下，燃烧催化剂的出口温度超过燃烧催化剂的加热确认温度，其在发动机转速较低时设定得较高，预定时间段。

公开(公告)号：US09200551B2

公开(公告)日：2015-12-01

申请号：US14108464

申请日：2013-12-17

Applicant: KUBOTA Corporation

Inventor： Mitsugu Okuda ,  Yoshikazu Takemoto ,  Takashi Onishi ,  Hozumi Ishida ,  Manabu Miyazaki ,  Yuichi Tamaki ,  Tomoya Akitomo ,  Katsuaki Arai

IPC: F01N3/10 ,  F01N3/36 ,  F01N3/025 ,  F01N3/32

CPC classification number: F01N3/10 ,  F01N3/0256 ,  F01N3/323 ,  F01N3/36

Abstract: An exhaust treatment apparatus for an engine including a combustible gas supplying passage; a heat releasing port opened in an upstream side in the exhaust passage from the oxidation catalyst and in a downstream side in the combustible gas supplying passage, the exhaust passage and the combustible gas supplying passage communicating with each other through the heat releasing port; an ignition apparatus beneath the heat releasing port, the heat of flaming combustion of combustible gas ignited by the ignition apparatus being supplied to the exhaust passage to raise the temperature of exhaust in the exhaust passage; a flame holding plate in a downstream side in the combustible gas supplying passage from the ignition apparatus, an exhaust guiding plate at the top portion of the flame holding plate, the exhaust guiding plate having an upward slope toward a downstream side in the exhaust passage.

Abstract translation: 一种用于包括可燃气体供应通道的发动机的排气处理装置; 在所述排气通路的上游侧从所述氧化催化剂和所述可燃性气体供给路径的下游侧开口的排气口，所述排气通路和所述可燃性气体供给路径通过所述散热口相互连通; 在放热口下方的点火装置，由点火装置点燃的可燃气体的燃烧热量供给到排气通道，以提高排气通道中的排气温度; 来自点火装置的可燃性气体供给路径的下游侧的火焰保持板，在火焰保持板的顶部的排气引导板，排气引导板朝向排气通路的下游侧具有向上的倾斜。