Diaphragm

Abstract

This article is provided inside a gaseous fuel supply device for driving an engine driven by liquid fuel with gaseous fuel. By displacing in response to the action of the pressure inside the gaseous fuel supply device, it is a diaphragm that adjusts the amount of gaseous fuel supplied to the engine. The disk-shaped base fabric of this article is a laminate of rubber and cloth. On the side of this article that faces the gaseous fuel pressure regulating chamber, a disk-shaped plate is provided, and at the center of the plate, a pin against which a valve body driving spring described later abuts is provided. As shown in the reference explanatory drawing 1 showing the operating state, the gaseous fuel supply device in which this article is used is provided between a carburetor that mixes and supplies fuel and air to the engine of a generator and an air cleaner that takes in air. As shown in the reference explanatory drawing 2 showing the operating state, the gaseous fuel supply device has a plate that sandwiches and fixes between the carburetor and the air cleaner, and a gaseous fuel supply section that supplies gaseous fuel inside the gaseous fuel supply device. As shown in the reference explanatory drawing 3 showing the operating state, the gaseous fuel that enters from the gaseous fuel supply section is guided to the gaseous fuel pressure regulating chamber by the opening and closing of a valve body provided in the gaseous fuel supply passage. This article displaces in response to the pressure change (change in the ratio of air and gaseous fuel from the ventilation hole) in the gaseous fuel pressure regulating chamber inside the gaseous fuel supply device in which this article is provided. The displacement of this article is transmitted to the valve body via the valve body driving spring, and the valve body is opened and closed. The gaseous fuel that exits the gaseous fuel pressure regulating chamber is sent to the spacer side and injected from the ejection port into the hollow passage of the spacer. The gaseous fuel injected from the ejection port rides on the air from the air cleaner side and is sent to the carburetor side.

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