KR-20260066833-A - SOLENOID VALVE FOR CONTROLLING OXYGEN SENSOR OF SHIP

Abstract

The present invention relates to a solenoid valve for controlling an oxygen sensor of a ship, and more specifically, to a solenoid valve for controlling an oxygen sensor of a ship that can increase the overall flow rate by widening the cross-sectional area of the through hole of the body nozzle. To this end, the present invention comprises: a plunger provided at the bottom of a core provided at the center of a coil cover in the shape of a cylinder, comprising a spring provided inside to be elastically supported by the core and a seat provided inside so as not to detach from the bottom; a bobbin provided around the plunger and having a coil wound thereon, which receives current from an external power source to generate an electromagnetic force stronger than the elastic force of the spring to move the plunger upward; a body nozzle provided at the bottom of the seat and comprising a through hole that opens and closes by the movement of the plunger; and a body provided at the bottom of the coil cover and having a fluid passage provided inside to discharge fluid flowing in through an inlet to an outlet, wherein the fluid passage opens when the through hole is opened and the fluid passage closes when the through hole is closed; wherein the through hole is composed of an upper through hole and a lower through hole formed with a diameter wider than that of the upper through hole.

Inventors

• 박태희
• 박석배

Assignees

• 주식회사 태양기전

Dates

Publication Date

20260512

Application Date

20241105

Claims (2)

1. A plunger provided at the lower part of a core provided at the center of a cylindrical coil cover, comprising a spring provided internally to be elastically supported by the core and a seat provided internally to prevent detachment from the lower part; A bobbin provided around the plunger and having a coil wound thereon, which receives current from an external power source to generate an electromagnetic force stronger than the elastic force of the spring to move the plunger upward; A body nozzle including a through hole provided at the lower part of the above sheet and opened and closed by the movement of the plunger; and A body having a fluid passage provided at the lower part of the coil cover to discharge fluid flowing in through an inlet to an outlet, wherein the fluid passage is opened when the through hole is opened and the fluid passage is closed when the through hole is closed; The above through hole is, A solenoid valve for controlling an oxygen sensor of a ship, characterized by being composed of an upper through hole and a lower through hole formed with a diameter wider than that of the upper through hole.
2. In Article 1, A solenoid valve for controlling an oxygen sensor of a ship, characterized by further including a plug integrally provided on the side of the coil cover, into which a wire connected to the external power source and the coil is inserted.

Description

Solenoid valve for controlling oxygen sensor of ship The present invention relates to a solenoid valve for controlling an oxygen sensor of a ship, and more specifically, to a solenoid valve for controlling an oxygen sensor of a ship that can increase the overall flow rate by widening the cross-sectional area of the through hole of the body nozzle. Solutions to satisfy the strengthening of IMO environmental regulations, the expansion of ECAs (Emission Control Areas), international atmospheric environmental regulations (limitations on SOx, NOx, and PM emissions), and marine environmental regulations (limitations on wastewater discharge) include SCR (Selective Catalytic Reduction), EGR (Exhaust Gas Recirculation), and scrubbers. Meanwhile, nitrogen oxides (NOx) increase when the temperature inside a marine engine rises, so it is very important to lower the combustion chamber temperature to reduce them. This utilizes the principle that when a portion of the exhaust gas is recirculated, an inert gas ( CO2 ) is introduced into the combustion chamber, which lowers the combustion temperature during the explosion stroke, thereby significantly reducing the amount of nitrogen oxides. Therefore, although a decrease in the oxygen ratio in the combustion chamber leads to a decrease in engine efficiency, it contributes significantly to suppressing the generation of nitrogen oxides, so it is used for the purpose of reducing harmful exhaust gases even at the cost of some loss in output. To achieve this, the oxygen ratio within the combustion chamber must be determined, and an Oxygen Sensor Unit (OSU), a sensing control module containing an oxygen sensor, is used. These oxygen sensors assist in air-fuel ratio control by comparing the difference between the oxygen concentration in the combustion exhaust gas and the oxygen concentration in the atmosphere. They measure the amount of oxygen contained in the exhaust gas and transmit the output voltage to the ECU (Engine Control Unit). Under constant operating conditions, they continuously exchange information with the ECU to perform feedback operations in order to maintain the theoretical air-fuel ratio of 14.7:1. Then, based on the values detected by the oxygen sensor and the operating conditions of the ECU logic, the solenoid valve is moved to a predetermined position. Consequently, the valve position sensor feeds back the output corresponding to the valve position to the ECU, and the ECU analyzes this feedback output to readjust the valve position and control the system. In other words, the solenoid valve is a valve for controlling the oxygen sensor in the ship's exhaust gas pollutant reduction device, and through control, it performs full opening and full closing operations of the flow path. Solenoid valves for controlling oxygen sensors on such ships require structural development to increase flow rates, and research is ongoing to simplify conventional complex internal structures and achieve miniaturization and weight reduction of the valves. FIG. 1 is a cross-sectional view showing a solenoid valve for controlling an oxygen sensor of a ship according to the prior art. FIG. 2 is a cross-sectional view showing a solenoid valve for controlling an oxygen sensor of a ship according to the present invention. FIG. 3 is an exploded perspective view showing a solenoid valve for controlling an oxygen sensor of a ship according to the present invention. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to the description, the advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the attached drawings. Furthermore, it should be noted that the terms used in this specification are for describing the embodiments and are not intended to limit the present invention; that singular forms of such terms include plural forms unless specifically stated otherwise in the text, and that words indicating direction in the description are intended to aid in understanding the description and may change depending on the context. A solenoid valve for controlling an oxygen sensor of a ship according to a preferred embodiment of the present invention will be described in detail below with reference to the attached drawings. FIG. 1 is a cross-sectional view showing a solenoid valve for controlling an oxygen sensor of a ship according to the prior art. FIG. 2 is a cross-sectional view showing a solenoid valve for controlling an oxygen sensor of a ship according to the present invention, and FIG. 3 is an exploded perspective view showing a solenoid valve for controlling an oxygen sensor of a ship according to the present invention. First, referring to FIG. 1, a solenoid valve (500) according to the prior art has a core (515) inside a coil cover (510), and a plunger (520) that is elastically supported by a spr