RU162498U1 - DIESEL FUEL HEATING DEVICE FOR INTERNAL COMBUSTION ENGINE - Google Patents

Abstract

A device for heating diesel fuel for an internal combustion engine with a fuel supply system including a fuel intake pipe, filters and a fuel tank containing heaters associated with a power source, one of which is mounted on a fuel intake pipe, and the other on filters, heaters are made in the form of a housing with on its outer surface, self-regulating heating semiconductor elements pressed to it by means of spring contacts, while one of the heaters it is installed at the end of the fuel intake pipe located inside the fuel tank, and other heaters are installed between the filter cover and its housing, one of the heaters is connected to the power system through an insulator located on the fuel tank and a connecting wire passing through it, and the resistors made as semiconductor elements are used in the form of plates, characterized in that the device contains an automatic power switch for the heaters, which is a thermal power relay, a circulator fuel and drain pipe with non-return valve.

Description

The utility model relates to transport engineering and can be used in fuel supply systems of a vehicle’s internal combustion engine.

Closest to the claimed solution (prototype) is a device (see the description of the patent of the Russian Federation No. 2093373 from 10.20.1997, IPC B60K 15/077) for heating the fuel for an internal combustion engine with its fuel supply system, including a fuel intake pipe, filters and a fuel tank containing heaters connected to the power source, one of which is installed on the fuel intake pipe and the other on filters, the heaters are made in the form of a housing with self-regulating semiconductor elements located on its outer surface Appressed thereto by spring contacts, wherein one of the heaters is mounted on the end toplivozabornogo pipe disposed inside the fuel tank, and the other heaters are installed between the filter cover and its housing or on the filter cover.

In addition, one of the heaters is connected to the power supply system through an insulator located on the fuel tank and a connecting wire passing through it; the heaters are installed only on fine filters; as a semiconductor element, resistors are used that can be made in the form of cylinders with a diameter of 19-26 mm and wall thickness 1.2-3 mm or in the form of plates.

The disadvantages of the prototype are the long preparation time of the engine for starting due to the inability to automatically heat the fuel with a significant decrease in ambient temperature in cold climates and local heating of the fuel in the power system (fuel tank, fine filters), which contributes to the formation of paraffin plugs in fuel lines and other elements system.

The technical result of the utility model is aimed at reducing the time for engine preparation for start-up by automatically heating the fuel with a significant decrease in ambient temperature in cold climates and increasing the efficiency of fuel heating due to its circulation through heaters.

The technical result is achieved in that the device contains an automatic power switch for the heaters, which is a thermo-power relay, a fuel circulator with an electronic control unit and a drain pipe with a check valve.

Distinctive features of the prototype is that the device contains an automatic power switch for the heaters, which is a thermal power relay, a fuel circulator with an electronic control unit and a drain pipe with a check valve.

The structural functional diagram of the proposed diesel fuel heating device for an internal combustion engine is shown in FIG. 1. In FIG. 2 shows a fine fuel filter; FIG. 3 - fuel intake pipe.

A device for heating diesel fuel for an internal combustion engine with a fuel supply system including a fuel intake pipe 1, filters 2, 3 and a fuel tank 4, comprises heaters 6, 7 connected to the power source 5, one 6 of which is mounted on the fuel intake pipe 1, and the other 7 are on the filters 3. The heaters 6, 7 are made in the form of a housing 8 with self-regulating heating semiconductor elements 9 located therein. The heater 6 is installed at the end of the fuel intake pipe 1 located inside the top willow tank 4, and heaters 7 are installed between the housing 10 of the fuel fine filter 3 and its cover 11. The heater 6 is connected to the power system through an insulator 12 located on the fuel tank 4 and a connecting wire passing through it 13. Resistors are used as semiconductor elements 9 . The device comprises an automatic switch 14 for powering the heaters 6, 7, which is a thermal power relay, a fuel circulator 15 with an electronic control unit (not shown), and a drain pipe 16 with a non-return valve 17.

18 indicates a panel with a switch and an indicator.

The device operates as follows.

When the switch on the panel 18 is turned on during the preparation of the engine for start-up in cold climatic conditions, electric current from the source 5 is supplied to the heaters 6, 7, which heat and heat the fuel in the tank 4 and filters 3, and to the fuel circulator 15. After a certain time, set programmatically depending on the ambient temperature in the delay control unit and the frequency of operation of the circulator 15, the latter is turned on and the heated fuel is circulated from the fuel tank 4 through a pipe 16, through an open check valve 17, fuel filters 3, 2, fuel intake 1 back to tank 4.

After a certain time necessary for the fuel to circulate in the specified circulation circle (the operation period is set programmatically in the control unit depending on the ambient temperature), the circulator 15 is turned off, thereby disconnecting from the consumption of electrical energy. When starting the engine, the signal from the electrical equipment (not shown) of the vehicle is supplied to the control unit for the delay and frequency of operation of the circulator 15, which excludes its operation when the engine is running.

Thanks to the circulation of heated fuel, the probability of formation of paraffin plugs in fuel lines and other elements of the fuel supply system that are not equipped with heaters is excluded.

The semiconductor elements 9 of the heaters 6, 7 are heated to the calculated temperature (switching point), after which the resistance of the structure increases sharply and the heaters “lock up”, the current consumption drops to a minimum, and heat generation becomes less.

As the heat loss from diesel heaters 6, 7 increases due to a drop in fuel temperature or an increase in fuel flow, the temperature at the resistors drops below the switching point, heat generation increases to compensate for the losses, which determines the effect of self-regulation, which occurs independently and automatically in the whole mass of heaters 6, 7.

The switching point specified in the structure of the semiconductor heating element 9, calculated for each type of heater 6, 7, prevents their overheating above a predetermined temperature.

Due to the unique property of the heater, self-regulation capabilities, i.e. changes in electrical resistance depending on temperature, the probability of overheating is completely eliminated and the consumption of electrical energy is reduced.

If the vehicle is stored in cold climatic conditions of operation before use in an open area or in an unheated room, then ensuring the engine is ready to start by performing the above work of the proposed device is carried out automatically by turning on the power using the automatic switch 14, the moment of switching on of which set depending on the ambient temperature.

In cold climates, if the driver feels the loss of engine power due to the waxing of the filters 3, he turns on the heaters from the panel shield 18, restoring the full engine power, or the device switches itself on automatically at a certain value of the ambient temperature drop. But in this case, when the engine is running, the operation of the circulator 15 is excluded, due to the signal from the control unit.

The result is a reduction in the preparation time for the engine due to automatic fuel heating with a significant decrease in ambient temperature in cold climates and an increase in the efficiency of fuel heating due to its circulation through heaters.

Claims (1)

A device for heating diesel fuel for an internal combustion engine with a fuel supply system including a fuel intake pipe, filters and a fuel tank containing heaters associated with a power source, one of which is mounted on a fuel intake pipe, and the other on filters, heaters are made in the form of a housing with on its outer surface, self-regulating heating semiconductor elements pressed to it by means of spring contacts, while one of the heaters it is installed at the end of the fuel intake pipe located inside the fuel tank, and other heaters are installed between the filter cover and its housing, one of the heaters is connected to the power system through an insulator located on the fuel tank and a connecting wire passing through it, and the resistors made as semiconductor elements are used in the form of plates, characterized in that the device contains an automatic power switch for the heaters, which is a thermal power relay, a circulator fuel and drain pipe with non-return valve.

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