UA55707C2 - Feeding system of the gas engine of a vehicle - Google Patents

Abstract

A feeding system of the gas engine of a vehicle has connected to the reducer-evaporator circuit of gas supply and circuit of circulation of cooling liquid, which is equipped with a pump and climatic unit. Additional pump and additional reducer-evaporator are included to the circuit of circulation of cooling liquid through shutoff fittings.

Description

The invention relates to power plants of vehicles, in particular to internal combustion engines using compressed or liquefied gas as fuel.

A well-known gas engine power supply system of a vehicle, which includes a gas supply circuit and a coolant circulation circuit connected to a reducer-evaporator (see V.I. Anokhin. Otechestvennye avtomobili. M., "Mashinostroenie", 1977, p. 199-214 ).

The disadvantage of the known system is the lack of a climate device for disposing of the heat of the coolant, which provides increased comfort in the vehicle cabin.

The closest in technical essence and the result achieved to the technical solution that is claimed is the gas engine power supply system, which includes a gas supply circuit and a coolant circulation circuit connected to a reducer-evaporator, which is equipped with a pump and a climate device (see .

Zolotnytsky V.A. Economical car on gas fuel. M., "Rus Auto Book", 2001, pp. 5-7).

The closest analog device in comparison with the analog device allows you to partially utilize the heat of the coolant by pumping the hot coolant through the climate device, which supplies warm air to the vehicle interior and, thereby, provides increased comfort in the winter period.

The disadvantage of this system is that it only allows you to increase the temperature in the interior of the vehicle, that is, to improve comfort only in the winter period.

The basis of the invention is the task of creating such a power system for the gas engine of the vehicle, which would provide more comfortable climatic conditions in the cabin at any time of the year, due to the heating of the cabin in the winter period and lowering the temperature in it during the summer period of vehicle operation.

The problem is solved by the fact that in the known power supply system of a gas engine of a vehicle, which includes a gas supply circuit connected to an evaporator reducer and a coolant circulation circuit, which is equipped with a pump and a climate device, according to the invention, in the coolant circulation circuit liquid through the shut-off valve, an additional pump and an additional evaporator reducer are built in, while the latter is connected to the gas supply circuit and to the main evaporator reducer.

An additional evaporator reducer can be made in the form of a thermally insulated single-stage membrane reducer equipped with a stop for adjusting the position of the membrane.

Installation of an additional pump and an additional evaporator reducer in the coolant circulation circuit through a shut-off valve allows this circuit to be divided into two separate circulation circuits ("cold" and "hot") in the summer. On the "hot" circuit, the coolant from the vehicle's engine passes through the main reducer-evaporator and is sent to the car's radiator. At the same time, the circulation in the "hot" circuit is provided by the pump of the circulation circuit of the fluid that cools the vehicle engine. In the "cold" circuit, separated from the "hot" circuit by a shut-off valve, the coolant is pumped using an additional pump through an additional evaporator reducer and climate device. In the additional reducer-evaporator, the liquid is intensively cooled due to the evaporation of compressed or liquefied gas and, in a cooled form, passes through the climate device, which supplies cold air to the cabin, ensuring passenger comfort in the summer.

To increase the intensity of cooling of the liquid supplied to the climate device in the summer period, the additional evaporator reducer is made thermally insulated, and to simplify its adjustment from summer to winter periods and to increase the intensity of liquid heating in the winter period, the additional reducer is made in the form of a single-stage membrane reducer and has a stop for adjusting the position of the membrane.

Fig. 1 shows the scheme of the power supply system of the gas engine of the vehicle, Fig. 2 shows the general view of the additional evaporator reducer.

The power supply system of the gas engine of the vehicle includes circuit 2 of gas supply from a gas cylinder (not shown in the diagram) and circuit C of coolant circulation connected to the evaporator reducer 1.

The liquid that cools the vehicle engine (not shown in the diagram) is pumped into circuit C by means of pump 4. In the circuit C of the coolant circulation through the shut-off fittings 5 and 6, a climate device 7, an additional pump 8 and an additional evaporator reducer 9 are installed , which are connected to the evaporator-reducer 1 by means of the gas supply circuit 2. At the same time, the additional evaporator-reducer 9 has heat-insulating protection 10 and is made in the form of a single-stage reducer with a spring-loaded membrane 12 using a spring 11. Membrane 12 through a rod 13 and hinges 14 and 15 is kinematically connected to the lever 16, at the end of which a shut-off valve 17 is installed. The membrane 12 is connected through a spring 11 to a stop for adjusting the position of the membrane, made in the form of an adjusting screw 18, and divides the cavity of the additional evaporator reducer 9 into two parts: the pre-membrane cavity 19 and the membrane cavity 20. The membrane cavity 20 is connected to the atmosphere using the opening 21.

The device works in the following way.

In the winter period, the closing armature elements 5 and 6 are set to the "open" position. The adjusting screw 18 through the spring 11 squeezes the membrane 12 to the uppermost position. At the same time, as a result of the movement of the rod 13, connected with the help of hinges 14 and 15 to the lever 16, the shut-off valve 17 opens completely. The gas coming under high pressure from the cylinder along the circuit 2 passes through the pre-membrane cavity 19 of the additional reducer-evaporator 9 without reducing the pressure in the reducer-evaporator 1, where its pressure is reduced to the value necessary for powering the engine. The coolant, pumped by pump 4, is fed into the vehicle engine, where it is heated, and then through circuit C in a hot state enters the climatic device 7, which gives heat to the cabin, which ensures increased comfort of passengers in the winter period.

In the summer, the closing armature elements 5 and 6 are set to the "closed" position. The adjusting screw 18 releases the membrane 12 to the lower position. At the same time, the shut-off valve 17 blocks the circuit 2 of the gas supply, and the air in the membrane cavity 20 is vented into the atmosphere through the opening 21. When gas is supplied from the cylinder under high pressure, the valve 17 opens and passes a portion of gas into the pre-membrane cavity 19 of the additional reducer- of the evaporator 9, where the compressed gas expands (and the liquefied gas changes from a liquid state to a gaseous state), taking heat from the heat carrier circulating in the circuit 3. When the gas pressure in the pre-membrane cavity 19 of the additional reducer-evaporator 9 equalizes with the pressure created by the spring 11 , valve 17 closes. From the additional reducer-evaporator 9, the gas enters the reducer-evaporator 1, where its pressure is finally reduced to the value necessary for powering the engine.

After part of the gas is used for the operation of the engine, the pressure in the pre-membrane cavity 19 decreases, valve 17 opens and lets another portion of compressed (or liquefied) gas into the cavity, which expands (evaporates) and cools the coolant in circuit 3 again. When installing reinforcing elements 5 and 6 in "closed" position (in the summer) part of the coolant is pumped from the vehicle engine through the evaporator reducer 1 into the coolant circulation circuit using pump 4, and part is pumped from the additional pump 8 through the additional evaporator reducer 9 to the climate device 7. The heat carrier, pumped by an additional pump 8 through an additional evaporator reducer 9 with heat-insulating protection 10, undergoes intensive cooling and with the help of the climate device 7 supplies cold air to the cabin, which increases the comfort of passengers in the summer. 71 8 23 o x X X I 7 ; x K. B I am a liquid that

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Fig. and - .

Claims (2)

I. The power supply system of the gas engine of the vehicle, which contains a gas supply circuit and a coolant circulation circuit connected to the evaporator reducer, is equipped with a pump and a climate device, which is distinguished by the fact that an additional pump is built into the coolant circulation circuit through the shut-off valve and additional reducer-evaporator, while the latter is connected to the gas supply circuit 1 with the main reducer-evaporator. 2. The system according to point I, which differs in that the additional reducer-evaporator is made in the form of a heat-insulated single-stage membrane reducer, which has a stop for adjusting the position of the membrane.