RU2272929C1 - Method of supplying gas-gasoline mixture to internal combustion engine - Google Patents

Abstract

FIELD: engine engineering.

SUBSTANCE: method comprises supplying liquid and gas fuel, igniting fuel by means of electric ignition system, starting the engine with the use of gas-gasoline mixture, heating the engine up to a temperature of 60°±5°C using gasoline-air mixture, control of fuel type and concentration, and control of fuel supply during engine operation by means of the electronic control unit by the signal from the temperature gauges and load. When the temperature of the engine reaches 60°±5°C, the gas injector is set in operation, liquid fuel injector stops operate, and engine operate with the use of gas. In the beginning of motion, when the speed of rotation increases, the injector of liquid fuel is activated thus providing the engine with gas-gasoline-air mixture. When the speed of rotation of the engine reaches a level corresponding to the maximum power, the injector of liquid fuel is cut off and the engine continues to operate with the use of gas.

EFFECT: expanded functional capabilities of engine.

1 dwg

Description

The invention relates to the field of automotive industry, namely to internal combustion engines with ignition from electric ignition, operating on gas, gasoline and a mixture of gas with gasoline.

The engines used in automobiles and operating on mixed fuels are widely known. See, for example, copyright certificates of the USSR No. 1650933, publ. 03/20/89, 91754, publ. 07.17.50 and others.

Various methods are also known for operating mixed-fuel internal combustion engines. See, for example, A.S. No. 91754.

Closest to the claimed known is a method of supplying and mixing gas and gasoline in the carburetor system of an internal combustion engine according to Russian patent No. 2216636, publ. 11/20/2003. This method includes the supply of liquid and gaseous fuel and ignition of the fuel from electric ignition, while the engine is started by a starter spinning the engine to 450-650 rpm, then a gasoline mixture is fed into the engine, at which the engine gains 1000-1100 rpm and a temperature of 20 ± 5 ° C, then the engine is heated to 60 ± 5 ° C on a gasoline-air mixture, the idle speed is provided on a gas-air mixture, the engine is operated from 1000-1100 rpm to 2500-2700 rpm on a gasoline-gas mixture, and when bo at higher speeds - on a gasoline-air mixture.

The disadvantage of this method is that it is not sufficiently variable, i.e. It does not provide the opportunity to work only on gas, which is the most economical type of fuel.

The objective of the invention is to provide a method that allows the internal combustion engine to operate at all operating modes with any combination of fuel supply, to optimize the consumption of all types of fuel with maximum efficiency and with maximum achievement of the technical characteristics of the engine, the greatest fuel economy and environmental friendliness when operating cars.

The technical result consists in the possibility of applying the invention to engines with injection power systems without constructive alteration of the engine, while it is possible to operate the car in three ways to use fuel:

- only on gasoline;

- only on gas;

- on a mixture of gasoline and gas,

moreover, in the latter case, the supply of gasoline and gas is controlled automatically, and at the same time conditions are provided for maximizing the use of the positive properties of each type of fuel (gasoline and gas), when the disadvantages of one fuel are compensated by the advantages of another.

This technical result is implemented as follows. In the method of supplying and mixing gas and gasoline to an internal combustion engine, comprising supplying liquid and gaseous fuel and igniting the fuel from electric ignition, in which the engine is started on a gas-gas mixture, and heating to a temperature of 60 ± 5 ° C on a gas-air mixture, according to the invention, the selection of fuels, their proportion and flow control during engine operation is carried out by an electronic control unit according to signals from temperature sensors and engine load, when the engine reaches at a temperature of 60 ± 5 ° С, the gas injector is turned on and the liquid fuel injector is turned off, the engine is running on gas, the liquid fuel injector is turned on at an increase in speed, the gas-gas mixture enters the engine, when the engine rpm corresponding to the maximum power is reached, the liquid fuel injector is turned off , the engine continues to run on gas.

The drawing schematically shows a device that implements a method of supplying and mixing gas and gasoline.

This device contains two parallel fuel supply lines: 1 - gas supply line, 2 - liquid fuel supply line. The following are installed in series on the gas supply line 1: a source of combustible gas (gas cylinder) 3, a shut-off solenoid valve 4, a gearbox 5, a combustible gas dispenser - injector 6. On a supply line of liquid fuel 2, a series of installed: a fuel tank (gas tank) 7, shut-off solenoid valve 8, liquid fuel dispenser - injector 9. Both lines 1 and 2 enter the manifold of the internal combustion engine 10. Valves 4, 8 and injectors 6, 9 are electrically connected to the control unit 11, to which the temperature sensor 12 and the sensor group are also connected in the state of operation of the internal combustion engine 13 and 14.

On block 11, an operating mode switch 15 is installed, and an air intake 16 is connected to the collector of the internal combustion engine 10.

The proposed device for supplying fuel to an internal combustion engine can operate in three modes specified by various positions of the switch 15:

- in the "Gasoline" position, the engine is operating normally on a gasoline mixture;

- in the "Gas" position - in the normal mode on the gas-air mixture;

- in the "Binar" position - on a gas-gas mixture with automatic dosing and mixing of gasoline, gas and air in the right proportions depending on the temperature and engine load.

Work in the "Binar" is as follows. When the engine is powered from a source of combustible gas (gas cylinder) 3 through a controlled open solenoid valve 4 and gearbox 5, gas is supplied to the injector 6. When the engine reaches 450 rpm, reported to it by the starter, the control unit 11 turns on the gas injector 6 and gas fed to the engine manifold 10.

At the same time from the fuel tank (gas tank) 7 through a controlled open solenoid valve 8 using the injector 9 in the manifold of the engine 10 receives gasoline.

In the manifold 10, gas and gasoline are mixed in the required proportions with the air entering through the air intake 16, and the engine is started on a gas-gas mixture. The engine develops revolutions up to about 1000-1100 rpm, but at the same time it is still not warm enough. Warming up the engine to a temperature of 60 ° C ± 5 ° C continues on gasoline. Gas flow stops. The movement can begin.

When the temperature reaches 60 ° C ± 5 ° C, the temperature sensor 12 sends a signal to the control unit 11, which turns on the injector 6 in idle mode and turns off the injector 9. The engine starts to run on gas.

At the beginning of the movement, when the engine speed increases, one of the sensors of the engine operation status sensors group: the engine speed sensor (actan corrector), the oxygen sensor, the seismic sensor, gives a signal to the control unit 11, which will turn on the injector 9 and the gas-gas mixture begins to flow into the engine. Upon reaching the optimum engine speed corresponding to maximum power, and the absence of increased load, the control unit disables the injector 9 and the engine continues to run on gas in a stable mode, including at maximum speed. The inclusion of the injector 9 occurs only when there is a need to increase power (additional load), for example, when overtaking sharply, when overcoming an obstacle, etc.

Thus, the application of the proposed method allows the engine to operate on any type of fuel in the most economical mode and taking into account climatic conditions, including the active use of more environmentally friendly gas fuels and at the same time providing conditions for the maximum use of the positive properties of each type of fuel.

Claims (1)

A method of supplying and mixing gas and gasoline to an internal combustion engine, comprising supplying liquid and gaseous fuel and igniting the fuel from electric ignition, in which the engine is started on a gas-air mixture, and heating to a temperature of 60 ± 5 ° C on a gas-air mixture, characterized in that the selection of fuels, their proportion and flow control during engine operation is carried out by an electronic control unit according to signals from temperature sensors and engine load, when the engine reaches a pace at 60 ± 5 ° С, the gas injector is turned on and the liquid fuel injector is turned off, the engine is running on gas, at the beginning of the movement, when the speed increases, the liquid fuel injector is turned on, the gas-gas mixture enters the engine, when the engine rpm corresponding to the maximum power is reached, the liquid fuel injector is turned off, the engine continues to run on gas.