RU207187U1 - CAR FUEL SYSTEM - Google Patents

Abstract

The utility model relates to the automotive industry, mainly to fuel systems designed to supply fuel to a car engine. The vehicle's fuel system contains a main fuel tank (1) and an additional fuel tank (2), suction pipelines (3) and drain pipelines (4), interconnected and equipped with solenoid valves (5), a coarse fuel filter (6) connected with engine (7). Fuel intakes (8) equipped with electric heaters are installed on the main fuel tank (1) and on the additional fuel tank (2). In this case, the fuel tanks (1) and (2) are connected by a pipeline (9), on which the electromagnetic valves (10) and (11) are located, which allows refueling through any fuel tank. The system also has ventilation pipelines (12), an electronic control unit (13) connected to the panel (14) of devices for switching elements. In addition, the fuel system additionally has a fuel assembly (15) located on the suction line between the fuel tanks and the engine (6). The fuel unit (15) contains an electric fuel pump (16) connected through pipelines with an electronic control unit (13), a solenoid valve (17), a check valve (18) connected to a coarse filter, a vacuum pressure sensor (19) and a sensor (20) overpressure, which are connected to the instrument panel (14) through the electronic control unit (13). These sensors make it possible to ensure the reliability of the car's fuel system due to the instant response of the system to changes in its operating conditions in severe operating conditions of the car, namely, during prolonged climbs with a full vehicle load, low temperatures, which ultimately reduces the mechanical wear of engine components and assemblies. reducing the duration of their work in modes of increased loads. A technical solution has been created that will improve the reliability of the vehicle's fuel system. 1 ill.

Description

The utility model relates to the automotive industry, mainly to fuel systems designed to supply fuel to a car engine.

Known fuel system containing a tank, a pump, the inlet of which is connected to the tank, an additional pump, the inlet of which is connected to the pump through the fuel line, additionally there is a device for regulating the pressure at the pump inlet, a device for damping pressure located in the pumps, a shut-off valve located on the fuel line near the pump, allowing the flow of fuel (see patent DE No. 10115324, IPC F02M 37/00, published on 17.10.2002).

Known fuel system containing a fuel tank, a filler pipe connecting the fuel tank to the filler hole, a supply pipe connecting the fuel tank to the fuel line, a pressure regulator located in the supply pipe, a pressure sensor, a device that combines a pressure regulator and a pressure sensor (see. EP patent No. 2457762, IPC B60K 15/03, F16K 27/00, F16L 41/00, published May 30, 2012).

Known system of fuel tanks for a vehicle, in particular for a truck, containing at least a first fuel tank and a second fuel tank, which are connected to each other by an equalizing pipe, a suction pipe for supplying fuel to the engine and a return pipe for supplying fuel from the engine at least to at least one of the fuel tanks, the equalizing pipe has a first end for supplying fuel to the first tank and a second end for sucking fuel from the second tank, and above the return pipe downstream in the equalizing pipe between said at least two tanks there is a check valve that allows movement flow in the direction from the second tank to the first tank and preventing flow in the opposite direction (see patent for invention RU 2493977, IPC V60K 15/06 (2006.01), V60K 15/077 (2006.01), F02M 37/00 (2006.01), published 27.09.2013).

Known diesel fuel system containing a fuel tank, a coarse fuel filter, a fuel priming pump, a maximum pressure valve, a fine fuel filter, a fuel manifold, a back-up valve, bypass valves, a water-fuel heat exchanger, a fuel outlet pipe connected to the fuel tank, parallel to the standard fuel manifold a process fuel manifold with a valve at the inlet is installed, which is connected to the standard fuel manifold through a jumper and a fuel flow sensor, an electrovalve is installed at the outlet of the standard fuel manifold, connected to a drain pipeline, additionally, between the process and standard manifolds, two jumpers with fuel flow sensors are made , moreover, on all jumpers, before and after each fuel flow sensor, electrically controlled valves are installed, and jumpers are made that connect the jumpers after the third flow sensor with a jumper in front of the second flow sensor and after the second flow sensor with a jumper before the first flow sensor, electrically operated valves are installed on each jumper (see. utility model patent RU No. 59742, IPC F02M 55/00 (2006.01), published on December 27, 2006).

A known gas diesel fuel system containing a tank, a fuel pump, a fuel filter, a solenoid valve, a high pressure fuel pump, a pressure accumulator, a pressure sensor, a pressure regulator, an electronic control unit, is equipped with modernized nozzles, a fuel tank, a coarse fuel filter, a fuel pump, a fine fuel filter, a high-pressure pump (see utility model patent RU No. 83102, IPC F02M 21/00 (2006.01), published on 20.05.2009).

Known vehicle fuel system, containing the main and additional fuel tanks, suction and drain pipelines, a coarse filter equipped with an electric heater, fuel intakes installed on fuel tanks, steam-air valves, suction and drain pipelines of both fuel tanks are equipped with solenoid valves, while the suction and drain the main tank pipelines are connected to the suction and drain pipelines of the additional tank through tees, the steam-air valves are installed in the fuel intakes and interconnected by means of a tee installed at the junction of the steam-air pipelines of the main and additional fuel tanks, while the end of the combined steam-air pipe is brought out to the necessary for overcoming the ford height, in addition, the fuel intakes are equipped with electric heaters (see utility model patent RU No. 114002, MPK V60K 15/06 (2006.01), F02M 37/00 (2006.01), published 03/10/2012).

Known vehicle fuel system, containing the main and additional fuel tanks, each of which has a suction and drain pipelines interconnected by three-way solenoid valves, a coarse fuel filter supplied to the engine, fuel intakes equipped with a heater, a connecting pipe connecting the fuel tanks and controlled by means of solenoid valves, additionally contains pipelines of the lower fuel outlet connected to the suction pipelines by three-way solenoid valves (see patent for utility model RU 187084, IPC V60K 15/06 (2006.01), F02M 37/00 (2006.01), published 18.02. 2019).

The prototype to the claimed technical solution in terms of the set of essential features and the achieved technical result is the fuel system of the car, containing the main and additional fuel tanks, suction and drain pipelines connected to each other and equipped with electromagnetic valves, a coarse filter equipped with an electric heater, fuel intakes installed on fuel tanks and equipped with electric heaters, two heat exchangers installed on the suction and drain pipelines parallel to the main line, a panel of devices for switching elements, characterized in that it contains a microprocessor controller for controlling the fuel temperature, a prestarting liquid remote heater equipping the suction pipelines with heating (see patent for utility model RU No. 178604 U1, IPC В60К 15/06 (2006.01), F02M 37/00 (2006.01), published on 11.04.2018).

The known solutions in most cases have insufficient operational ergonomics and reliability in uninterrupted operation, failures in the operation of the heater during vehicle operation and do not provide sufficient reliability during vehicle operation under various climatic conditions.

The problem to be solved by the claimed technical solution is to ensure the reliability of operation during vehicle operation.

The problem is solved by the fact that the fuel system of the car, containing the main and additional fuel tanks, suction and drain pipelines connected to each other and equipped with electromagnetic valves, a coarse filter, fuel intakes installed on fuel tanks and equipped with electric heaters, an electronic control unit with a dashboard switching elements, additionally has a fuel unit located on the suction line between the fuel tanks and the engine, while the fuel unit contains an electric fuel pump connected through pipelines to the electronic control unit, vacuum and overpressure sensors connected to the electronic control unit, an electromagnetic valve, check valve connected to the coarse filter.

The set of distinctive features, consisting in the fact that the car's fuel system additionally has a fuel unit located on the suction line between the fuel tanks and the engine, while the fuel unit contains an electric fuel pump connected through pipelines with an electronic control unit, vacuum and overpressure sensors, connected to the electronic control unit, the solenoid valve, the check valve connected to the coarse filter, allows to ensure the reliability of the vehicle's fuel system.

The claimed technical solution is illustrated by a drawing, which shows a diagram of the fuel system of a car.

The car's fuel system contains a main fuel tank 1 and an additional fuel tank 2, suction pipelines 3 and drain pipelines 4, connected to each other and equipped with solenoid valves 5, a coarse fuel filter 6 connected to the engine 7. On the main fuel tank 1 and on the additional fuel tank 2 installed fuel intakes 8, equipped with electric heaters. In this case, the fuel tanks 1 and 2 are connected by a pipeline 9, on which the solenoid valves 10 and 11 are located, which allows refueling through any fuel tank. The system also has ventilation pipelines 12, an electronic control unit 13 associated with a panel 14 of devices for switching elements.

In addition, the fuel system additionally has a fuel unit 15 located on the suction line between the fuel tanks and the engine 7. The fuel unit 15 includes an electric fuel pump 16 connected through pipelines to the electronic control unit 13, a solenoid valve 17, a check valve 18 connected to a coarse filter 6, a vacuum pressure sensor 19 and an overpressure sensor 20, which are connected to the instrument panel 14 through an electronic control unit 13. These sensors make it possible to ensure the reliability of the vehicle's fuel system due to the immediate response of the system to changes in its operating conditions in severe operating conditions of the vehicle, namely, during prolonged climbs with a full vehicle load, low temperatures, which ultimately reduces the mechanical wear of engine components and assemblies. reducing the duration of their work in modes of increased loads.

Moreover, the reliability of operation due to the sensors is achieved as follows. When the vacuum in the supply line exceeds the value of normal operation, the vacuum pressure sensor 19 in the fuel unit 15 registers and sends a signal to the electronic control unit 13, which, in turn, turns on the additional electric fuel supply pump 16 of the fuel unit 15. This creates back-up at the inlet to the low-pressure fuel pump of the engine, which provides a certain flow margin that may be required when the engine is operating in a “loaded” mode, thus reducing the “starvation” of the system and ensuring its uninterrupted operation. When the operating conditions return to "normal" and additional back-up is no longer required, the excess fuel is drained through the check valve 18 of the fuel unit 15 and is registered by the overpressure sensor 20, the signal of which is transmitted to the electronic control unit 13, which turns off the operation of the electric fuel pump 16, switching operation of the fuel system in the "normal" mode, when the fuel passes in transit through the fuel unit 15 from a certain fuel tank to the coarse fuel filter 6 and, then, to the engine 7.

The fuel system operates as follows.

When the engine 7 is running, switching the intake and drainage of fuel between fuel tanks 1 and 2 occurs by means of solenoid valves 5, which are controlled from the driver's seat using a special button located on the instrument panel 14. In this case, the used fuel tank is selected with the switch of the corresponding button. In the event of problems with switching the solenoid valves 5, the remote valves are equipped with manual switching, since the location of the valves themselves is provided in direct accessibility for the driver's actions. To use a specific selected fuel tank, solenoid valves 10 and 11 are used, also controlled from the instrument panel 14. When refueling the vehicle, the solenoid valves 10 and 11 are open. When the vehicle is operating, after selecting a certain fuel tank, the fuel, having passed through the solenoid valve 5, enters the fuel unit 15 and passes through the open solenoid valve 17 and then enters the coarse fuel filter 6. When the car is operating on prolonged climbs and high altitudes, a vacuum occurs in the fuel system, while the electronic control unit 13, receiving a signal about the pressure drop in the fuel system through the vacuum pressure sensor 19, gives the command to close the solenoid valve 17 and turn on the electric fuel pump 16 powered by a 12V on-board network. When switching the solenoid valve 17, one of its circuits is plugged with a plug (not shown in the figure). When overcoming protracted ups, when an overpressure appears in the fuel intake line, the check valve 18 is triggered, while the electronic control unit 13, fixing the pressure value by the overpressure sensor 20, gives a command to open the solenoid valve 17 and to stop the operation of the electric feed pump 16.

Thus, the claimed technical solution allows to ensure the reliability of the fuel system.

The claimed technical solution meets the requirement of industrial applicability and is possible for implementation on standard technological equipment using previously mastered technologies.

Claims (1)

The fuel system of a car, containing the main and additional fuel tanks, suction and drain pipelines connected to each other and equipped with solenoid valves, a coarse filter, fuel intakes installed on fuel tanks and equipped with electric heaters, an electronic control unit with an element switching instrument panel, characterized by which additionally has a fuel unit located on the suction line between the fuel tanks and the engine, while the fuel unit contains an electric fuel pump connected through pipelines to the electronic control unit, vacuum and overpressure sensors connected to the electronic control unit, a solenoid valve, a check valve connected to a coarse filter.

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