SU1757926A1 - Vehicle fuel feed system - Google Patents

Abstract

Usage: the invention can be used in mechanical engineering, in particular, in devices for protecting the fuel system of an internal combustion engine from contamination from the atmosphere. SUMMARY OF THE INVENTION: The vehicle fuel system is provided with an additional piping 10 connecting the sump 2 of the internal combustion engine 1 to the airspace of the fuel tank 5, and the locking device 11 is installed on the line of this gas connection. When the engine is running, crankcase gases come from the sump 2 tank 5. Thus, an increase in the gas volume in the tank is compensated for when the fuel level in it is lowered. Since there are no abrasive particles in crankcase gases, the fuel tank 5 is not contaminated with them. 1 il.

Description

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The invention relates to mechanical engineering, in particular, to devices that protect the fuel system of an internal combustion engine with a breather for venting crankcase gases to the atmosphere, a fuel tank with a filler neck and a stopper that drips, communicating the interior space of the tank with the atmosphere, pipeline, tying it to the fueling system.

The worthiness of the propulsion system is the absence of discharge in the fuel tank when it is emptied into engine pre-operation.

The disadvantage is the clogging of the fuel in the tank of the transport vehicle due to the accumulation of atmospheric air into it in the fuel consumption during the engine operation.

As a prototype, a system can be used to ensure the safety of closed tanks, containing an internal combustion engine, a fuel tank, a fuel pipeline connecting the tank to the fuel system of the engine, as well as connecting the rear axle space of the tank to the crankcase of the engine with a locking device.

The advantage of the prototype is fire protection, which may occur due to the outflow of fuel from the vehicle tank.

The disadvantage is the ingress of pollution from the atmosphere into the fuel system during the operation of the vehicle,

The purpose of the invention is the elimination of contaminants from the atmosphere into the fuel system during the operation of the conveyor;

The objective is achieved in that a vehicle fuel supply system comprising an internal combustion engine, comprising a fuel tank, a fuel pipe connecting the tank to the fuel system of the engine, as well as connecting the supra-fluid space of the tank to the crankcase of the engine with a locking device by sealing over - liquid space, the locking device is designed so that an overpressure from the crankcase can be passed into the superfluid space.

The drawing shows a system diagram podechi vehicle fuel.

The system comprises an internal combustion engine 1 with a pallet 2 and a breather 3 having a gasket 4. for venting crankcase gases to the atmosphere, a fuel tank 5 with a stopper b of the filler neck 7, a trunk 8 connecting the tank 5 with the fuel pump 9 of the engine fuel system, and an additional pipeline 10 connecting the pallet 2 with the supra-fluid space of the tank. A shut-off device 11 is installed on the communication line of the tank and the pallet. In line 8, a fuel priming pump 12, coarse filters 13 and 14 fine filters are installed. The nozzle 15 is connected to a pump 9 with a high pressure pipe 16 and a pipe 17 with an inlet of a fine filter. The fuel pump communicates with the tank 5 bypass pipe 18.

The system works as follows.

When the engine 1 is operating, in the pan 2 accumulate crankcase pockets piercing the cylinder combustion chamber. Therefore, in the pallet 2 there is always a slight gas overpressure, since the gasket 4 of the breather 3 has little resistance to the release of crankcase gases into the atmosphere. The pressure of crankcase gases in the internal combustion engine usually does not exceed 30-40 mm of water. Art. (300-400 Pa). The main part of the crankcase gases goes through the breather 3 into the atmosphere and a small part of it goes through an additional pipeline 10 to the tank 5 when the level of fuel in it decreases. Thus, an overpressure of gases is always maintained in the tank, equal to the pressure in the pan 2 during engine operation.

When the engine is running, the fuel priming pump 12 takes fuel from tank 5 and through filters 13 and 14 supplies high-pressure pump 9. Excess fuel from this pump is transferred back to tank 5. From high-pressure pump 9, fuel is supplied through pipelines 16 to nozzles 15. Leak the fuel from the nozzles 15 through the drain pipe 17 is fed to the inlet of the filter 14,

Experimentally, at the 4CHN 14.5 / 20.5 diesel test bench, it was found that there is no need to connect the supra-fluid space of the diesel engine's fuel back-up with the atmosphere. Vacuum in the bench fuel tank does not occur when the fuel level in it decreases. It is compensated by the entry of diesel engine crankcase gases there. At the same time, the crankcase gases completely lack abrasive particles, which always contain atmospheric air.

Thus, during the operation of the transport tracked vehicle, the possibility of abrasive particles entering the fuel tank is completely eliminated.

Claims (1)

Formula of the invention so as to exclude hits The fuel supply system of the transport vehicle from the atmosphere into the fuel system contains an internal engine during the operation of the non-combustion system, which includes the fuel tank, means by sealing the fuel pipe connecting the super-fluid tank 5 spaces, shut-off with the engine fuel system, as well as the device is designed to provide the supra-fluid space that transmits the excess the arteries of the engine are neither from the crankcase to the supra-fluid with a shut-off device, characterized by space.