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：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.