RU78874U1 - GAS DIESEL FUEL SYSTEM - Google Patents

Abstract

A gas-diesel fuel supply system containing tanks, fine and coarse filters, a booster pump, a high pressure pump, nozzles, characterized in that it is equipped with a gas cylinder, an electric booster pump, an electromagnetic distribution valve, a filter, a pilot fuel distribution unit, injectors with electromagnetic valves , electronic control unit, device for changing the angle of advance of fuel injection.

Description

The proposal relates to transport engineering and, in particular, can be used in engine building.

A well-known diesel fuel supply system (KamAZ 6 × 6 automobiles. Operation manual. - M .: Voenizdat, 2001. - p. 38-39), consisting of tanks, distribution valve, fine and rough filters, booster pump, high pump pressure nozzles.

The specified technical solution is the closest to the declared technical essence and the achieved result and is taken as a prototype. However, the disadvantage of this power system is that it does not allow for the translation of the diesel engine on natural gas.

The objective of the proposal is to ensure the possibility of diesel operation on natural gas.

The solution to this problem is achieved by the fact that the gas-diesel fuel supply system contains tanks, fine and coarse filters, a booster pump, a high pressure pump, nozzles are equipped with a gas cylinder, an electric booster pump, an electromagnetic distribution valve, a filter, an ignition fuel distribution unit, injectors with electromagnetic valves , an electronic control unit, a device for changing the angle of advance of fuel injection.

Distinctive features of the prototype is that the gas-diesel fuel supply system is equipped with a gas cylinder, an electric feed pump, an electromagnetic distribution valve, a filter, an ignition fuel distribution unit, injectors with electromagnetic valves, an electronic control unit, a device for changing the fuel injection timing.

Analysis of the proposed solution and prototype allows us to conclude that it meets the conditions of patentability of a utility model.

Figure 1 is a schematic diagram of a fuel supply system for a gas diesel engine.

The fuel system of a gas-diesel engine consists of a fuel tank 1, a gas cylinder 2, an electric priming pump 3, an electromagnetic distribution valve 4, a coarse filter 5, a booster pump 6, a fine filter 7, a high pressure pump 8, nozzles 9, a filter 10, a distribution unit ignition fuel 11, injectors with solenoid valves 12, pipelines 13, electronic control unit 14, device for changing the angle of advance of fuel injection 15.

The gas diesel fuel supply system operates as follows. When the diesel engine is switched to natural gas (gas-diesel cycle), the electronic control unit 14 gives a signal to turn on the electric booster pump 3. The electric booster pump 3 supplies diesel fuel

from the tank 1 through the filter 10 to the ignition fuel distribution unit 11, in which pressure is generated. When creating fuel pressure in the ignition fuel distribution unit 11, the electronic control unit 14 provides a signal to the electromagnetic distribution valve 4, injectors with electromagnetic valves 12 and the device for changing the timing of the fuel injection 15. In this case, the electromagnetic distribution valve 4 shuts off the supply of diesel fuel and connects a gas cylinder 2 to the diesel power system, and the device for changing the angle of advance of fuel injection 15 increases the angle of advance of fuel injection.

Gas from a gas cylinder 2 through pipelines 13 enters through an electromagnetic distribution valve 4, a coarse filter 5, a booster pump 6, a fine filter 7 to a high pressure pump 8. A high pressure pump 8 supplies gas through the first channel of the nozzle 9 to the engine cylinders . Gas is supplied at the beginning of the compression process, due to the changed fuel injection advance angle using the device for changing the fuel injection advance angle 15, to ensure better mixing of gas with air.

The electronic control unit 14 provides signals to the injectors with solenoid valves 12 in the order of operation of the cylinders. The electromagnetic valve 12 opens when the compression ends in the cylinder, and the ignition dose of diesel fuel from the ignition distribution unit 11 enters the engine cylinder through the second channel in the nozzle 9. Diesel fuel in the engine cylinder spontaneously ignites from the high temperature of the air-gas mixture, igniting the entire mixture.

When moving the engine from the gas-diesel cycle, the electronic control unit 14 switches the system to its original position. In this case, first the electromagnetic distribution valve 4 disconnects the gas bottle 2 from the power supply system and connects the tank 1. The engine runs on diesel fuel, generating all the gas in the power supply system. As soon as all the gas in the system is consumed, the electronic control unit 14 turns off the electric feed pump 3, changes the angle of advance of the fuel injection with the help of the device for changing the angle of advance of fuel injection 15 and turns off the injectors with electromagnetic valves 12. Thus, the engine will start to run on regular diesel fuel. Fuel from the tank 1 through an electromagnetic distribution valve 4, a coarse filter 5, a booster pump 6, a fine filter 7, a high pressure pump 8 and the first nozzle channel 9 enters the engine cylinders at the end of the compression stroke, where it spontaneously ignites from the high temperature of the compressed air.

The application of this technical solution will increase the efficiency of the gas diesel engine and ensure the compactness of the gas diesel power system.

Claims (1)

A gas-diesel fuel supply system containing tanks, fine and coarse filters, a booster pump, a high pressure pump, nozzles, characterized in that it is equipped with a gas cylinder, an electric booster pump, an electromagnetic distribution valve, a filter, a pilot fuel distribution unit, injectors with electromagnetic valves , electronic control unit, device for changing the angle of advance of fuel injection.