RU20063U1 - INJECTION FUEL SUPPLY SYSTEM IN THE INTERNAL COMBUSTION ENGINE - Google Patents

Description

Injection system for supplying fuel to an internal combustion engine

The utility model relates to the field of transport engineering, mainly to the power supply system of internal combustion engines (ICE) of self-propelled vehicles and can be used both in the production and modernization of the existing fleet of vehicles.

A known fuel injection system of the company BOSCH, 4, including a fuel tank, an electric high-pressure fuel pump, a fuel filter, a fuel and a drain line, a fuel injector and a pressure regulator. If necessary, a cold start valve can be installed in the system. Fuel from the tank is pumped through the filter into the fuel line to which the nozzle is connected. A constant pressure difference between the pump outlet and the intake manifold is maintained by a pressure regulator. To do this, one end of the pressure regulator is connected to the fuel line, and the other to the collector. To reduce noise from pulsations during operation of the regulator - pressure and nozzles, a damping oscillation can be installed in the system (pulsation damper).

Such a known system cannot be applied on domestic vehicles without adaptation.

Known injection system 5 for supplying fuel to the engine of a vehicle, mainly vehicles of various UAZ models (Ulyanovsk Automobile Plant), for example, a UAZ-3303 car.

The system contains a fuel tank, a filter sump, a fuel pump, a fuel fine filter, a suction and discharge lines, and nozzles. As the fuel pump used diaphragm pump. In the event of a failure of the pump diaphragm, fuel enters and flows out of the lower cavity of the pump casing, the diaphragm is disrupted, and therefore the pump does not supply the required amount of fuel to the nozzles.

The objective of the utility model created was to ensure the reliability and durability of the fuel injection system of internal combustion engines (ICE), mainly of foreign manufacture, for example, TOYOTA models 3RZ-F, 3RZ-FE, the equipping of which domestic vehicles, will make them economical, increased dynamic performance and environmental friendliness.

MPK7 V 60K 15/00

fuel pump, filters for coarse and fine fuel cleaning, nozzles and a microprocessor control unit, which, according to the proposal, additionally contains a pressure control valve that is connected to an automatic injection advance controller built into the microprocessor control unit and is connected to a gas pump, which is equipped with a submersible pump an electric gas pump mounted in a fuel tank carrying a fuel pre-filter connected to the input of an immersed electric gas pump.

In the proposed system, the TOYOTA gas pump is used as a submersible electric gas pump.

In such a system, a mesh filter is used as a coarse fuel filter.

The system contains an additional drain pipe in which a pressure control valve is installed.

The technical result of the proposed implementation of the injection system for supplying fuel to an internal combustion engine is:

-provision of high efficiency and reliability;

-effective mixture formation depending on engine load;

- high engine efficiency.

Increased reliability and durability of the system are achieved through the use of the proposed submersible electric gas pump, which always draws fuel from the lower layer of fuel in the gas tank, through a coarse filter, which reduces the likelihood of ice and air getting into the gas pump.

Efficiency and efficient mixture formation are determined by the operation of an engine with optimal characteristics, to ensure which a pressure control valve and an automatic timing controller are provided in the system, which change the moment of fuel injection in proportion to an increase or decrease in engine speed.

Environmental friendliness of the engine - vehicle is provided by the improvement of the fuel supply system; the possibility of using an engine with improved environmental performance; elimination of leaks of surplus and gasoline vapors from the system and tank.

The proposed injection system for supplying fuel to an internal combustion engine is illustrated by drawings, where:

FIG. 1 schematically shows its general view;

The injection system for supplying fuel to the internal combustion engine contains a fuel tank 1, fuel lines 2, 3, a gas pump 4, filters 5, 6, coarse and fine fuel, electromagnetic nozzles 7 (injector rail) and a microprocessor control unit 8. The system additionally contains a pressure regulating valve 9. It is connected to an automatic injection advance controller 10 integrated in the microprocessor control unit 8 and connected to a gas pump 4, for which a submersible electric gas pump is installed, for example, TOYOTA, 3 mounted in the fuel tank 1 carrying a fuel filter 5, located at the bottom of the tank 1 in front of the entrance to the gas pump 4 and connected to it. A mesh filter was used as a fuel pre-filter 5, and it is advisable to equip the system with a fine filter TOYOTA 3 as a fuel fine filter 6. An additional drain pipe 11 is installed in the system, in which a pressure control valve 9 is installed. The fuel tank 1 is equipped with a sealed plug 12, connecting the tank with the atmosphere through the exhaust and intake valves 13 and 14.

When the engine is running, fuel is supplied from the tank 1 through a coarse filter 5 to a submersible electric gas pump 4, through which under pressure through a fuel line 2 through a fine filter 6 it flows to nozzles 7, which inject a metered amount of fuel into the combustion chamber of the engine (not shown). Excess fuel is diverted through drain line 11 back to fuel tank 1. Gasoline pump 4 is driven by a camshaft (not shown). The fuel is injected in the engine ahead of the ignition moment in accordance with the engine speed to obtain its optimal characteristics, which is provided by a pressure control valve 9 and an automatic advance controller 10 that change the injection moment in proportion to an increase or decrease in engine speed.

A prototype of the proposed fuel supply system was manufactured at the applicant enterprise and passed experimental tests when installed on one of the UAZ vehicle models. Tests confirmed the expected technical result, made it possible to establish that the system can be manufactured using existing equipment, without creating special technological equipment, using the latest industrially mastered components and parts. The system is simple. In the manufacture and maintenance, it also reduces noise.

1.E.V. Mikhailovsky and others. The device of the car. M., "Engineering, 1987., (analog).

2.E.N. Orlov, E.R. Varchenko. UAZ cars. Maintenance and repair. M., "Transport, 1993., (analog).

3.TOYOTA, 3RZ-F, 3RZ-FE, ENGINE, Repair manual, Apr. 1996 (prior art).

4. BOSCH fuel injection system, Automobile electrical equipment manual. A., Tranter, Alfa Mer, St. Petersburg, 1998, p. 147-172; from. 152 fig. 7, 9, (analog).

5. Maintenance and repair manual. UAZ-31512 cars and their modifications. M., "Third Rome, 1995, p.23, Fig. 38 (prototype).

Sources of information

Claims (4)

1. An injection system for supplying fuel to an internal combustion engine, comprising a fuel tank, fuel lines, a fuel pump, coarse and fine fuel filters, nozzles and a microprocessor control unit, characterized in that it further comprises a pressure control valve that is connected to an automatic injection timing controller built into the microprocessor control unit, and connected to a gas pump, which is installed as a submersible electric gas pump mounted in a fuel tank, carried We filter the fuel filter connected to the inlet of the submersible electric gas pump.  2. The system according to claim 1, characterized in that the TOYOTA gas pump is used as a submersible electric gas pump.  3. The system according to claims 1 and 2, characterized in that a strainer is used as a fuel pre-filter. 4. The system according to claims 1 to 3, characterized in that it further comprises a drain pipe in which a pressure control valve is installed.