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Let's show the details and structure of the Gas Injection Valve of the ME-GI engine, an injector system designed for use on two types of fuels (Dual Fuel), highlighted in detail as follows:
Image 1: Structure of a gas nozzle
Main components:
Nozzle: A nozzle that releases gas or liquid into a cylinder.
Sealing ring and O-ring: Used to prevent fuel and pressure leakage
Spring: A spring that helps control the on-off of the nozzle.
Spindle and Spindle guides: help guide the movement of the nozzle core
Images 2 and 3: Nozzle operation
Hydraulic oil:
Hydraulic oil is used to control the nozzle opening-closing relying on high pressure.
Sealing oil:
A sealed oil that prevents gas leakage within the system.
Gas detection:
Safety gas leak sensors
Non-return valve:
A non-reverse valve that prevents fuel reflux.
Flange:
An access point used to install a nozzle to the engine.
Image 4: Operation in two modes
Fuel Oil Mode:
It uses 100% oil fuel, with the nozzle fully open (Full Cut-off Shaft Life).
Fuel was sprayed in the area of all the nozzles.
Dual Fuel Mode (Pilot Injection):
It uses two fuels (gas + oil) with the nozzle only partially open (Low Cut-off Shaft Life).
The fuel spraying area is only 7.5% of the pure oil mode.
Additional information:
Overhaul interval:
It should be maintained every 8,000 hours.
Service life:
The life of the nozzle is expected to be 16,000 hours.
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