公开(公告)号：US12234786B2

公开(公告)日：2025-02-25

申请号：US18663584

申请日：2024-05-14

Applicant: KUBOTA CORPORATION

Inventor： Michisuke Iga ,  Tomotaka Tanaka ,  Kosuke Aoki ,  Hiroyuki Kawasoe ,  Kengo Hidaka

IPC: F02D41/22 ,  B60K17/02 ,  B60K17/08 ,  F02D41/00 ,  F02D41/40

Abstract: Provided is an engine control device and an engine device that enable stable self-travelling of the engine in a limp home mode. The engine control device includes a revolution speed detection unit that detects revolution speed of the engine, and an arithmetic unit that calculates an opening of a throttle valve opened by an electronic throttle mechanism, and an injection amount of fuel injected by injectors. In an operation of the engine in the limp home mode, in a case where the revolution speed of the engine detected by the revolution speed detection unit exceeds a predetermined limiting value, the arithmetic unit performs an operation to suppress injection of the fuel to be injected by the injectors.

公开(公告)号：US10287953B2

公开(公告)日：2019-05-14

申请号：US15579761

申请日：2016-03-01

Applicant: KUBOTA Corporation

Inventor： Yuki Ozaki ,  Naoki Inoue ,  Tamotsu Ohashi ,  Kengo Hidaka ,  Hiroyuki Kawasoe ,  Masaru Hayashida ,  Shunji Okano ,  Michisuke Iga

IPC: F01N3/28 ,  B01D53/94 ,  F01N3/10 ,  F01N13/10 ,  B01J23/86 ,  B01J35/04 ,  F01N13/16

Abstract: An exhaust purifying apparatus is provided, that can be manufactured at low manufacturing costs and is capable exhibiting high exhaust purifying performance. The exhaust purifying apparatus includes an exhaust passage, and an exhaust purifying member disposed in the exhaust passage. The exhaust purifying member is made of stainless steel. The surface of the stainless steel material is not covered with a catalyst coat containing a catalyst component, so that the surface of the stainless steel material is brought into contact with exhaust. The exhaust purifying member is made of precipitation hardening stainless steel and/or austenitic stainless steel.

公开(公告)号：US11873769B2

公开(公告)日：2024-01-16

申请号：US17541911

申请日：2021-12-03

Applicant: KUBOTA Corporation

Inventor： Michisuke Iga ,  Masaharu Ono

IPC: F02D41/00 ,  F02D13/06 ,  F02P5/152 ,  F02P5/15 ,  F02D41/14 ,  F02N11/08

CPC classification number: F02D41/0087 ,  F02D13/06 ,  F02D41/1498 ,  F02N11/0848 ,  F02P5/151 ,  F02P5/1504 ,  F02P5/1506 ,  F02P5/1522 ,  F02D2250/21 ,  F02N2200/023 ,  F02N2200/024 ,  F02N2300/2002

Abstract: An engine-equipped vehicle capable of preventing gear noise and gear wear when the engine is started is provided. A multicylinder engine, a gear transmission that shifts power from the multicylinder engine by a shift operation, a centrifugal clutch arranged in a power transmission path from the multicylinder engine to the gear transmission, and an electronic control device that controls an operation of the multicylinder engine are included and the engine is configured to be started with a partial cylinder operation start where under control of the electronic control device, only some cylinders are operated and an operation of other cylinders is stopped.

公开(公告)号：US11441525B2

公开(公告)日：2022-09-13

申请号：US17325195

申请日：2021-05-19

Applicant: KUBOTA Corporation

Inventor： Kosuke Aoki ,  Michisuke Iga

IPC: F02M69/04

Abstract: A port injection engine, in which injected fuel readily vaporizes inside suction ports, includes: a suction port; a suction valve; and a port injector that injects fuel to an inner peripheral surface of the suction port. When the fuel is burned in a predetermined combustion cycle, an injection start of a fuel injection period is set within an end part of a valve opening period before the suction valve is fully closed, during a combustion cycle previous to the predetermined combustion cycle. The end part of the valve opening period is preferably set from 50° to 20° before the suction valve is fully closed at a crank angle.

公开(公告)号：US11873778B2

公开(公告)日：2024-01-16

申请号：US17984019

申请日：2022-11-09

Applicant: KUBOTA Corporation

Inventor： Michisuke Iga

IPC: F02D9/02 ,  F02D13/02

CPC classification number: F02D9/02 ,  F02D13/0234 ,  F02D2009/0213

Abstract: A spark ignition type engine adjusts a base lower limit value of a valve opening degree of an ISC valve to avoid excessive engine rotation that may occur when an increase correction by atmospheric pressure is performed. When a detected engine temperature becomes lower, the base lower limit value of the ISC valve opening degree is increased to the fully open side, and the base lower limit value is corrected to increase to the fully open side with an increase correction value on the basis of a detected atmospheric pressure in an engine middle-high temperature range where the engine temperature exceeds a predetermined value, and the increase correction value is increased to the fully open side as the detected atmospheric pressure becomes lower, and the increase correction is prohibited in an engine low temperature range where the engine temperature is equal to or lower than the predetermined value.

公开(公告)号：US11767796B2

公开(公告)日：2023-09-26

申请号：US17983953

申请日：2022-11-09

Applicant: KUBOTA Corporation

Inventor： Michisuke Iga ,  Kazuhiro Tanaka ,  Masanori Hirochi ,  Yoshinori Oyama

IPC: F02D9/00 ,  F02D9/08 ,  F02D13/02 ,  F02D9/02

CPC classification number: F02D9/08 ,  F02D13/0234 ,  F02D2009/0223 ,  F02D2009/0225 ,  F02D2009/0227 ,  F02D2009/0244 ,  F02D2009/0249

Abstract: A spark ignition type engine enabling engine startability to be favorable is provided. The spark ignition type engine includes a main intake-air passage; a throttle valve of the main intake-air passage; a bypass intake-air passage bypassing the throttle valve; an ISC valve of the bypass intake-air passage; and an electronic control device that controls an engine speed by adjusting an opening degree of the ISC valve, in which when the engine is started, cranking is performed at a cranking opening degree at which the ISC valve is narrowed by a predetermined amount from a fully opened state by control of the electronic control device, so that an intake-air negative pressure is generated on an intake-air downstream side of the ISC valve.

公开(公告)号：US10598122B2

公开(公告)日：2020-03-24

申请号：US15366357

申请日：2016-12-01

Applicant: KUBOTA Corporation

Inventor： Michisuke Iga ,  Kiyoharu Kimoto

IPC: F01L1/14 ,  F02F1/40 ,  F02F1/28 ,  F01L1/047 ,  F01L1/18

Abstract: In a cylinder head cooling structure of engine E including a camshaft 15 rotated by a crankshaft 2, a push rod, and an actuatable rocker arm, an injection hole 46 for injecting oil pressurized by an oil pump 44 is formed in a shaft portion 43 between an exhaust cam 36 on the camshaft 15 and a journal 15j at its rear end, and the oil injected the injection hole 46 is allowed to enter a rear cylinder head cover 7 through a pushrod chamber in which the push rod is disposed.