Pilot Fuel Module for Marine Low Speed ​​Dual Fuel Diesel Engines

Abstract

The invention relates to a pilot fuel module for a marine low-speed dual-fuel diesel engine. The pilot fuel module for the marine low-speed dual-fuel diesel engine comprises an oil inlet filter, an oil supply oil-pump, an oil inlet flow metering module, an oil inlet fine filter, an oil return pressure stabilizing valve, an oil return flow metering module, a control system, a valve element and an instrument which are connected by pipelines, wherein the oil inlet filter is connected with a pilot fuel supply fuel-tank through a main oil inlet valve, the oil supply oil-pump is connected with the downstream of the oil inlet filter, the oil inlet flow metering module is connected with the downstream of the oil supply oil-pump through a manual check valve, the oil inlet fine filter is connected with the downstream of the oil inlet flow metering module and is connected with an external pipeline of a test bench through a main output valve, the oil return pressure stabilizing valve is connectedwith the rear part of the external pipeline of the test bench through a main oil return valve, and the oil return flow metering module is connected with the downstream of the oil return pressure stabilizing valve and connected with the pilot fuel supply fuel-tank through an oil return manual check valve. The pilot fuel module for the marine low-speed dual-fuel diesel engine realizes the independent supply of the dual-fuel diesel engine pilot fuel, has the advantages of compact structure, perfect function, high automation degree and high adaptability, and is suitable for the pilot fuel supply requirements of all types of dual-fuel diesel engines.

Description

technical field [0001] The invention relates to a marine low-speed diesel engine, in particular to a pilot fuel module for a marine low-speed dual-fuel diesel engine, and belongs to the technical field of diesel engines. Background technique [0002] With the increasingly stringent environmental protection requirements, large-scale marine low-speed dual-fuel diesel engines have emerged, which can meet Tier3 emission requirements without post-treatment of flue gas, and their operating costs are lower than traditional diesel engines. technical advantages. As we all know, the working principle of a diesel engine is to inject diesel into a high-temperature and high-pressure cylinder for compression ignition, but natural gas does not have compression ignition characteristics, so when marine low-speed dual-fuel diesel engines use natural gas or other clean fuels for motor vehicles, they cannot be used like traditional diesel engines. Compression ignition combustion is carried out...

AI Technical Summary

Problems solved by technology

[0003] At present, domestic diesel engine manufacturers with DF main engine manufacturing experience use the method of branching the traditional fuel to supply the diesel engine. Since the pressure and flow required for the main fuel and pilot fuel of the diesel engine are different, this will cause the main engine When the gas mode is used, the fuel supply of the pilot fuel is unstable, which also affects the fuel supply of the main fuel; in addition, the pilot fuel is branched from the main fuel, so the measurement of the pilot fuel consumption cannot be effectively carried out independently, and the actual fuel consumption cannot be provided. Accurate fuel consumption of pilot fuel for motor vehicles

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