Fuel gas injection position variable device in gas intake passage

Abstract

The invention discloses a fuel gas injection position variable device in a gas intake passage. In order to overcome the problem that a fuel gas injection position is not variable at present, the fuelgas injection position variable device comprises a shell, five rotary valves, a large valve upper cover, a small valve upper cover, a rotary driving lever disc, a motor assembly and a gas injection pipe assembly, wherein the shell comprises a shell upper cover and a main shell; the shell upper cover is fixed to the top end of the main shell; the motor assembly is fixed to a baseplate of the main shell; the rotary driving lever disc is arranged at the right end of a motor output shaft in the motor assembly in a sleeving manner; the five rotary valves are arranged on four valve upper covers of the large valve upper cover and the small valve upper cover and are rotatably connected to valve seats No.1 to No.5 located at the inner side of the front shell wall of the main shell; the four valve upper covers on the large valve upper cover and the small valve upper cover are adhered and sealed to the valve seats No.1 to No.5 located at the inner side of the front shell wall of the main shell byadopting metallic glue; and the gas injection pipe assembly is arranged at the outer side of the front shell wall of the main shell by adopting a thread.

Description

technical field [0001] The invention relates to a device belonging to the technical field of gas fuel engines, more precisely, the invention relates to a gas injection position variable device in an intake passage. Background technique [0002] With the development of the automobile industry, environmental and energy issues have gradually emerged, and gas fuel engines can reduce NO x And PM emissions, and reduce the consumption and dependence on petroleum fuels. For a gas fuel engine, the flow in the cylinder and the gas concentration distribution in the cylinder have a very important influence on the combustion. Generally, the gas fuel engine uses multi-point injection in the intake port, but it cannot mix the gas and air evenly, and a certain amount of gas will inevitably form in the cylinder. When the gas injection position changes, the gas concentration stratification state in the cylinder also changes. Different injection positions make the gas stratified in the intake...

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Problems solved by technology

[0003] Publication number CN103470404A, in the patent document on December 25, 2013, discloses a gas injection position and nozzle number variable device, which mainly includes a base, a nozzle assembly and a sealing assembly, and is manually tightened on the base for different The direction and quantity of the bolt assembly are used to control the spraying position and the number of nozzles, which cannot be electronically controlled, and the operation is very inconvenient

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