RU2752919C2 - Fuel tank of agricultural machine - Google Patents

Abstract

FIELD: agricultural mechanical engineering.

SUBSTANCE: invention relates to agricultural mechanical engineering, namely to self-propelled agricultural machines equipped with a fuel tank designed for supplying fuel to an internal combustion engine. The fuel tank of the agricultural machine includes a reservoir for fuel equipped with a filler neck with a cap that has valves for aligning pressure inside and outside the tank, a fuel receiver, a line for returning fuel to the tank, a sump with a tape for draining the sludge, as well as a fuel level sensor. Inside the main volume of the tank, a consumption reservoir is located, which is filled with fuel, when the engine operates. The fuel is pumped from the bottom zone of the main volume of the tank by means of a jet pump actuated by fuel jet from the line for returning fuel to the tank. The fuel receiver of the system for supplying fuel to the engine receives fuel from the lower part of the consumption reservoir. When fueling the agricultural machine from the filler neck, fuel is supplied directly to the consumption reservoir, and only when the consumption reservoir is filled, fuel is supplied to the main volume of the fuel tank. The overflow of fuel from the consumption reservoir into the main volume of the fuel tank during the parking of the agricultural machine is prevented by means of an anti-spillage valve.

EFFECT: invention allows for reducing unused fuel residue, as well as preventing air penetration to the system for supplying fuel to the engine when working on a slope or when passing unevenness with a low fuel residue due to the outflow of fuel from the fuel receiver.

3 cl, 3 dwg

Description

The invention relates to agricultural engineering, namely, to self-propelled agricultural machines equipped with a fuel tank, designed to provide fuel for an internal combustion engine.

Known fuel tanks such companies as "Massey Ferguson" [1. MF WR 9800 Series. - Prospectus for Massey Ferguson. Website www.agcocorp.com]. MacDon [2. M Series Mowers - MacDon Brochure. Website www.macdon.com]. "CNH" [3. Speedrower Self-Propelled Windrowers. - Prospectus of the "New Holland" company. Website www.newholland.com] and others. The fuel tanks of these machines are tanks for fuel, equipped with a filler neck with a cap having valves to equalize pressure inside and outside the tank, a fuel receiver, a fuel return line to the tank, a sump with a tap or a plug for drainage of sludge, as well as a fuel level sensor.

Provision of uninterrupted power supply of the engine with fuel in these structures is carried out by taking fuel from the deepest part of the tank, if possible.

The closest to the claimed invention in terms of technical essence is a fuel tank of a self-propelled mower developed by MacDon M1240 [M Series Mowers - Prospectus of MacDon. Website www.macdon.com]. Its fuel tank is a tank for fuel, equipped with a filler neck with a lid with valves to equalize pressure inside and outside the tank, a fuel receiver, a fuel return line to the tank, a sump with a valve for draining sediment, and a fuel level sensor.

The disadvantages of this design are as follows:

- a large unused remaining fuel required to prevent fuel outflow from the fuel receiver when working on a slope or when driving uphill and downhill;

- there is a high probability of air ingress into the engine fuel supply system when working on a slope or when driving on irregularities with a low fuel residual due to fuel outflow from the fuel receiver.

The objective of the invention is to reduce the unused fuel residue, as well as to prevent air from entering the engine fuel supply system when working on a slope or when driving over irregularities with a low fuel residual due to the outflow of fuel from the fuel receiver.

The technical result is achieved due to the fact that in the design of the tank of a fuel agricultural vehicle, which includes a tank for fuel, equipped with a filler neck with a lid having valves to equalize pressure inside and outside the tank, a fuel receiver, a fuel return line to the tank, a sump with a valve for draining sludge, as well as a fuel level sensor, a supply container and a jet pump are introduced, while the supply container is located inside the main volume of the tank and is filled during engine operation with fuel pumped from the bottom zone of the main volume of the tank using a jet pump driven by a jet of fuel from the main return of fuel to the tank; The intake of fuel by the fuel receiver of the engine fuel supply system is made from the lower part of the supply tank. When refueling an agricultural machine with fuel from the filler neck, the fuel through the refueling channel goes directly into the supply tank and, only after filling it, enters the main volume of the fuel tank. Overflow of fuel from the supply tank into the main volume of the fuel tank while the agricultural machine is parked is prevented by the anti-drain valve.

Due to the introduction of a fuel supply tank into the design of the tank, the unused remaining fuel is reduced to a negligible value. Introducing the filling of the supply tank from the bottom zone of the main tank volume using a jet pump driven by a jet from the fuel return line to the tank prevents air from entering the engine supply system with fuel, when working on a slope or when driving on irregularities with a low fuel residue due to fuel outflow from the fuel receiver.

The inventive device is illustrated by the drawings shown in Figures 1-3:

fig. 1 - fuel tank of an agricultural machine in section along the axis of the supply tank, side view on the left;

сверху спереди;fig. 2 - sectional view of a fuel tank of an agricultural vehicle, view

top front;

fig. 3 - a fuel tank of an agricultural vehicle in section along the axis of the drain valve, side view on the left.

The claimed invention includes the following structural elements (Figs. 1-3): 1 - a container for fuel; 2 - filler neck; 3 - cover with valves for equalizing pressure inside and outside the tank; 4 - fuel receiver; 5 - fuel return line to the tank; 6 - sump; 7 - valve for draining sediment; 8 - fuel level sensor; 9 - consumable capacity; 10 - filling channel; 11 - jet pump; 12 - anti-drain valve; 13 - overflow holes of the supply container, - while the supply container is fixed inside the fuel container, the fuel return line to the tank and the jet pump are integrated into the supply container, the fuel receiver is fixed to the supply container, the anti-drain valve is a petal movably attached to the jet pump.

The device works as follows. When filling fuel into the tank, the fuel through the filler neck 2 through the filler channel 10 enters the supply tank 9, fills it and through the overflow holes of the supply tank 13 enters the main volume of the fuel tank 1. As fuel is consumed when the engine of the agricultural machine is running, the fuel level is mainly the volume of the fuel tank 1 decreases, and in the supply tank 9 remains unchanged - at the level of the lower edge of the overflow holes of the supply tank 13. This is explained by the fact that when the engine is running, fuel from the bottom zone of the main volume of the fuel tank 1 is constantly pumped into the supply tank 9 by a jet pump 11, driven by a jet of fuel from the fuel return line to the tank 5. Even when the fuel level in the main volume of the fuel tank 1 decreases to the level of the jet pump 11, the supply tank 9 remains filled to the lower edge of the overflow holes. At the same time, the fuel sensor signals a complete lack of fuel in the tank, which serves as a signal to the operator to immediately refuel the fuel tank, while the fuel supply in the supply container protects the fuel system from air ingress.

The technical result consists in the fact that when working on slopes and when overcoming slopes, as well as in a situation where the fuel reserve is almost completely used up, the fuel receiver in the supply tank is always immersed in fuel, which prevents air from entering the fuel system of the agricultural machine.

Claims (3)

1. Fuel tank of agricultural machinery, including a fuel tank equipped with a filler neck with a lid with valves to equalize pressure inside and outside the tank, a fuel receiver, a fuel return line to the tank, a sump with a valve for draining sediment and a fuel level sensor, which is characterized by that a supply container and a jet pump are introduced into it, while the supply container is located inside the main volume of the tank and is filled during engine operation with fuel pumped from the bottom zone of the main volume of the tank using a jet pump driven by a jet of fuel from the fuel return line to the tank ... 2. The fuel tank according to claim 1, characterized in that the intake of fuel by the fuel receiver of the engine fuel supply system is made from the lower part of the supply container. 3. The fuel tank according to claim 1, characterized in that in order to prevent fuel overflow when the engine is not running through the jet pump from the supply tank into the main volume of the fuel tank, an anti-drain valve is installed in the pressure tank.

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