CNG engine system

Abstract

The invention provides a CNG engine system for the engine system of a vehicle. The CNG engine system comprises a cylinder part, which forms a cylindrical mixing part, wherein fuel and air are mixed inthe cylindrical mixing part; an air damper part, which is connected to the front end of the inlet of the mixing part; an ejector, which is inserted into the ejector hole in the upper end of the mixing part; and a shutoff valve part, which is connected to the lateral surface of the cylinder part. The cylinder part, the shutoff valve part, the ejector, and the air damper part are integrated. According to the CNG engine system, the number of components is reduced. Different fuel pipelines can be uniformed, the maintenance becomes easier, and compared with a conventional CNG engine system, the structure of the provided CNG engine system is more compact, so that the engine system is more convenient to install, and the installation position can be picked more easily.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of priority of Korean Patent Application No. 10-2016-0096952 filed in the Korean Intellectual Property Office on July 29, 2016, which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to a compressed natural gas (CNG) engine system, and more particularly, to a CNG engine system whose composition is more compact than a conventional CNG engine system, so that the engine layout can be achieved by Higher degree of freedom: In vehicles using CNG as fuel, different fuel lines are unified according to the type of vehicle, thereby developing a unified fuel supply system module. Background technique [0004] In general, compressed natural gas (CNG) has the advantages of high combustion efficiency and low emission of air pollutants compared to different vehicle fuels such as gasoline or diesel. [0005] Such as figure 1 and figure 2...

AI Technical Summary

Problems solved by technology

[0007] Since a typical CNG engine system definitely requires components for supplying fuel to the combustion chamber (such as shut-off valve 8, fuel metering valve 10, throttle body 14, mixer 12, etc.), mounting each component requires a corresponding bracket And the gas pipe 16 is required to transfer fuel between components, so there are problems of increasing working time, working days and costs, in particular, there is often a dead-volume of fuel due to the gas pipe 16, therefore, fuel efficiency get lower

However, in this case, there are problems in that since the composition and installation structure of fuel lines differ depending on the kind of vehicle, the accuracy of fuel control decreases and the degree of freedom of engine layout position deteriorates

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