US 2026/0153058 A1 · DUAL FUEL INJECTOR, ENGINE, AND CONTROL METHOD FOR A DUAL FUEL INJECTOR

Abstract

Provided are a dual fuel injector, an engine, and a control method for a dual fuel injector, relating to the technical field of engines. The dual fuel injector includes a fuel oil supply passage, a gaseous fuel supply passage, and a fuel injection portion. The fuel oil supply passage is used for delivering fuel oil, the gaseous fuel supply passage is used for delivering gaseous fuel, the fuel injection portion is used for being in communication with a combustion chamber, and the fuel injection portion is selectively in communication with the fuel oil supply passage, and the fuel injection portion is selectively in communication with the gaseous fuel supply passage.

Claims20

Dependent claims

A dual fuel injector, comprising a fuel oil supply passage and a gaseous fuel supply passage, wherein the fuel oil supply passage is used for delivering fuel oil, and the gaseous fuel supply passage is used for delivering gaseous fuel, the dual fuel injector further comprises a fuel injection portion, the fuel injection portion is used for being in communication with a combustion chamber, the fuel injection portion is selectively in communication with the fuel oil supply passage, and the fuel injection portion is selectively in communication with the gaseous fuel supply passage.

An engine, comprising a dual fuel injector, wherein the dual fuel injector comprises a fuel oil supply passage and a gaseous fuel supply passage, the fuel oil supply passage is used for delivering fuel oil, the gaseous fuel supply passage is used for delivering gaseous fuel, the dual fuel injector further comprises a fuel injection portion, the fuel injection portion is used for being in communication with a combustion chamber, the fuel injection portion is selectively in communication with the fuel oil supply passage, and the fuel injection portion is selectively in communication with the gaseous fuel supply passage;

wherein the engine further comprises a cylinder block, a cylinder head, and a piston, the piston is slidable in the cylinder block, and the cylinder head covers the cylinder block, when the piston moves to a top dead center, the combustion chamber is enclosed between a top surface of the piston and a bottom surface of the cylinder head, the dual fuel injector is inserted into the cylinder head, a bottom end of the dual fuel injector extends into the combustion chamber, and the fuel injection portion is in communication with the combustion chamber.

A control method for a dual fuel injector, implemented by the dual fuel injector, wherein the dual fuel injector comprises a fuel oil supply passage and a gaseous fuel supply passage, the fuel oil supply passage is used for delivering fuel oil, the gaseous fuel supply passage is used for delivering gaseous fuel, the dual fuel injector further comprises a fuel injection portion, the fuel injection portion is used for being in communication with a combustion chamber, the fuel injection portion is selectively in communication with the fuel oil supply passage, and the fuel injection portion is selectively in communication with the gaseous fuel supply passage;

wherein the control method for a dual fuel injector comprises a fuel oil priority injection control method, a gaseous fuel priority injection control method, and a dual fuel synchronous injection control method;
wherein the fuel oil priority injection control method comprises:
first connecting the fuel oil supply passage with the fuel injection portion and disconnecting the gaseous fuel supply passage from the fuel injection portion so that the fuel injection portion injects fuel oil into the combustion chamber;
and then disconnecting the fuel oil supply passage from the fuel injection portion and connecting the gaseous fuel supply passage with the fuel injection portion so that the fuel injection portion injects gaseous fuel into the combustion chamber;
the gaseous fuel priority injection control method comprises:
first disconnecting the fuel oil supply passage from the fuel injection portion and connecting the gaseous fuel supply passage with the fuel injection portion so that the fuel injection portion injects gaseous fuel into the combustion chamber;
and then connecting the fuel oil supply passage with the fuel injection portion and disconnecting the gaseous fuel supply passage from the fuel injection portion so that the fuel injection portion injects fuel oil into the combustion chamber;
and
the dual fuel synchronous injection control method comprises:
first connecting the fuel oil supply passage with the fuel injection portion and connecting the gaseous fuel supply passage with the fuel injection portion so that the fuel injection portion injects gaseous fuel and fuel oil into the combustion chamber synchronously;
and then disconnecting the fuel oil supply passage from the fuel injection portion and disconnecting the gaseous fuel supply passage from the fuel injection portion.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application

19/407,996Filed 3 Dec 2025

Priority

CN 202411759214.73 Dec 2024

Published

4 Jun 2026

Term ends

Not estimatedThe source records don’t support an estimate.

Classification11 codes

F02D 19/0694
Injectors: operating with a plurality of fuels
F02D 19/0642
Characterised by the type of fuels: at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
F02D 19/0649
Characterised by the type of fuels: liquid fuels having different boiling temperatures, volatilities, densities, viscosities, cetane or octane numbers
F02D 19/10
Simultaneously using pluralities of fuels: peculiar to compression-ignition engines in which the main fuel is gaseous

Dual fuel injector, engine, and control method for a dual fuel injector

Life of this patent

Dual fuel injector, engine, and control method for a dual fuel injector

Life of this patent

Abstract

Claims20