公开(公告)号：US20210363954A1

公开(公告)日：2021-11-25

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：US20250003377A1

公开(公告)日：2025-01-02

申请号：US18679397

申请日：2024-05-30

Applicant: KUBOTA Corporation

Inventor： Kosuke AOKI ,  Hiroyuki KAWASOE ,  Kengo HIDAKA ,  Kohta NAKAO ,  Miharu YAHATA

IPC: F02M35/104 ,  F02M35/10

Abstract: A support structure for an intake manifold that reduces a burden of support on a front side of the intake manifold. The support structure includes a cylinder head and a fixing structure, and supports the intake manifold. An axial length direction of a crankshaft center is defined as a left-right direction, a horizontal direction orthogonal to the left-right direction is defined as a front-rear direction, and one side in the front-rear direction is defined as a front side. The intake manifold includes a collector and a plurality of branch pipes led out to the front side from the collector. An intake outlet at a front end of each of the branch pipes is supported by the cylinder head. The collector is elastically supported by the fixing structure. A throttle body is attached to a left or right end of the collector.

公开(公告)号：US20240384692A1

公开(公告)日：2024-11-21

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.