초록 ▼

Disclosed are a system and a method for promoting the formation of the emulsified fuel of a diesel engine. The system includes a viscous oil-water tank; an emulsified fuel mixing device for mixing viscous oil-water with diesel fuel to obtain emulsified fuel; a dual-fuel return fuel emulsification-pr

Disclosed are a system and a method for promoting the formation of the emulsified fuel of a diesel engine. The system includes a viscous oil-water tank; an emulsified fuel mixing device for mixing viscous oil-water with diesel fuel to obtain emulsified fuel; a dual-fuel return fuel emulsification-promoting device connecting to a diesel tank, the emulsified fuel mixing device, and the return fuel pipe and the main fuel pipe of the engine respectively; a heat-exchanging device for heating the emulsified fuel from the dual-fuel return fuel emulsification-promoting device by the cooling water of the engine; a first purifying pipe and a second purifying pipe for purifying the main fuel pipe; and a dual-fuel management device for switching between the diesel fuel supply and the emulsified fuel supply according to the temperature of the cooling water, and after the ignition switch of the engine is closed, for controlling the diesel fuel to clean up the emulsified fuel in the engine, in the main fuel pipe and in the devices. By using the system, the water content of the emulsified fuel can be up to 33% and the diesel engine can keep essentially unchanged power, start easily and run steadily.

대표청구항 ▼

1. An emulsion fuel enabling system comprises the following components: a premix water tank adapted to hold premix water which is made up of water and surfactant;a WDE blending module connected to said premix water tank and a diesel fuel tank, it mixes premix water and diesel to produce WDE, said WD

1. An emulsion fuel enabling system comprises the following components: a premix water tank adapted to hold premix water which is made up of water and surfactant;a WDE blending module connected to said premix water tank and a diesel fuel tank, it mixes premix water and diesel to produce WDE, said WDE blending module comprises a mixing tank, a spray misting unit for controlling emulsion fuel droplet size and a fluid level sensor, a nozzle of the spray misting unit is located inside the mixing tank, said fluid level sensor is also located inside the mixing tank, said spray misting unit and the fluid level sensors are both linked to a dual fuel management module;a dual-fuel return fuel enabling module connected to said diesel fuel tank, said WDE blending module, an engine return fuel line and a main fuel supply line, said dual-fuel return fuel enabling module comprises a dual-fuel return fuel enabling tank, a return fuel valve and a fuel supply valve, said return fuel valve located above said fuel supply valve;a heat exchange module connected to said main fuel supply line and said dual-fuel return fuel enabling module, engine coolant supplies heat to the heat exchange module to pre-heat WDE fuel;a first purge line and a second purge line, said first purge line is connected to said diesel fuel tank and a main fuel supply line inlet, said second purge line is connected to a main fuel supply line outlet and said dual-fuel return fuel enabling module;a dual fuel management module connected to said WDE blending module, said dual-fuel return fuel enabling module and the heat exchange module via electric transmission wires and signal transmission wires; it selects the fuel type to supply to an engine according to the engine's coolant temperature, it will start the purge cycle when an ignition switch is turned off; a first purge route uses diesel fuel from an auxiliary fuel supply line to purge the engine's internal fuel system, a second purge route starts from said first purge line, said main fuel supply line, and said second purge line purge WDE fuel from the main fuel supply line and components configured to the main fuel supply line;wherein the mixing tank comprises an upper portion where new WDE is produced and a lower portion where ready-to-use WDE is temporarily stored. 2. The system according to claim 1 wherein said premix water tank and said diesel fuel tank are connected to the WDE mixing tank via a static mixer. 3. An emulsion fuel enabling method comprises the following steps: (1) when an engine's ignition switch is turned on, diesel fuel is supplied from a diesel fuel tank via an auxiliary fuel line, when the engine begins running, a dual-fuel management module will commence recirculation of residual WDE fuel inside a WDE fuel blending tank, a WDE blending module produces WDE fuel on demand to match the fuel intake rate of the engine, wherein production of WDE fuel on demand include the below-mentioned steps; (a) said dual-fuel management module controls diesel and premix water to be mixed before being sprayed into said WDE blending tank;(b) a spray misting unit re-circulates mixing tank content through the spray misting nozzles;(c) a fluid level sensor located inside the WDE blending tank senses liquid level inside the WDE blending tank and transmits this information to the dual-fuel management module, if WDE level reaches the preset high level, the management module will stop feeding more diesel and premix water to the WDE blending tank, spray misting unit will continue re-circulating the contents of the WDE blending tank for a preset duration before stopping, if WDE liquid level reaches the preset low level, the dual-fuel management module will start feeding diesel and premix water to the WDE blending tank;(2) after a preset time duration following engine start-up, the management module will shut off the auxiliary fuel supply line valve and open the main fuel supply line valve, fuel will be supplied via the main fuel supply line;(3) the engine's coolant temperature is continuously monitored by said dual-fuel management module, the dual-fuel management module selects the fuel type to supply to the engine according to the engine's coolant temperature, if the coolant heats up to a preset temperature, the duel-fuel management module will start to supply WDE, if the coolant temperature falls below the preset temperature, the management module will switch back to supply diesel to the engine;(4) the engine is supplied with the WDE fuel or diesel fuel through a dual-fuel return enabling tank of dual-fuel return fuel enabling module, a return fuel valve must be located above a fuel supply valve in said dual-fuel return enabling tank, the return fuel valve is connected to an engine return fuel line;(5) WDE fuel has to pass through a heat exchange module, where WDE fuel is preheated by the engine's coolant before being supplied to the engine;(6) when the engine's ignition is switched off, said dual fuel management module will continue to Run the engine for a preset duration before shutting down the engine, it will close the main fuel line valve and open said auxiliary fuel line valve, diesel fuel will be supplied to the engine via the auxiliary fuel line, this is to purge WDE fuel of the engine and purge WDE fuel from the main fuel line and components configured to the main fuel line. 4. The method of claim 3 wherein premix water and diesel will pass through a static mixer, where the two fluids are mixed before going into WDE blending module. 5. The method of claim 4 wherein in the event of system failure such as one or more than one circumstances as below, said management module will automatically supply diesel fuel to the engine when it detects the following: (1) WDE mixing module develops a fault;(2) Engine's coolant temperature falls below preset temperature;(3) Premix Water tank level falls below preset low level;(4) Diesel fuel tank level falls below preset low level.