RU2400645C1 - System to store and feed gas into transport facility "vniigaz" - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: proposed system comprises cryogenic gas cylinder, pipeline to transfer liquefied natural gas into evaporator communicated with pipeline that carries gaseous gas from evaporator into transport facility engine, and multipurpose valves. Additionally, system comprises compressed natural gas cylinder communicated, via pipeline, gas pressure reducer with cryogenic gas cylinder and pipeline that feeds gaseous gas into transport facility engine.

EFFECT: perfected reliable design.

1 dwg

Description

The invention relates to the use of natural gas as a motor fuel, primarily for heavy vehicles, tractors, buses and tractors.

The closest technical solution to the claimed invention of a system for storing and supplying gas to a vehicle engine is a cryogenic fuel system of liquefied natural gas (LNG) for internal combustion engines, including a cryogenic gas cylinder connected by a pipe equipped with shut-off and control valves, with a gas supply device through the evaporator, made in the form of a piston hydraulic cryogenic pump with energy supply systems, control and damping of gas flow pulsations (US patent A No. 5884488, priority dated March 23, 1999).

The disadvantages of this technical solution are:

- the complexity of the design and operation of the device for supplying gas to the engine using a hydraulic piston cryogenic pump with energy supply systems, control and damping of gas flow pulsations and, as a result, insufficient reliability and increased costs for its maintenance and repair;

- the inevitability of failures in the operation of the vehicle due to the lack of a backup fuel system for storing and supplying gas to the engine, necessary in the event of the complete production of the main gas fuel.

The technical tasks set in the present invention are the creation of a more advanced and reliable design of the storage system and power supply of the vehicle engine with liquefied natural gas, as well as providing it with reserve fuel, in particular compressed natural gas (CNG).

The solution to these problems is ensured by the fact that the system for storing and supplying gas to the vehicle’s engine, including a cryogenic gas cylinder, an LNG supply pipe to the evaporator, which is connected to a pipeline through which gaseous gas after the evaporator enters the vehicle’s engine, and equipped with a shut-off and control fittings, according to the claimed invention, the system is equipped with a CNG cylinder, connected by a pipe through a gas pressure reducing gear with a cryogenic gas cylinder and from pipes a wire through which gaseous gas enters the vehicle engine.

To ensure the smooth operation of the vehicle, it is supplied with reserve fuel - CNG. In case of full consumption of the main fuel, LNG includes the supply of reserve fuel.

The invention is illustrated in the drawing, which shows a schematic diagram of a storage system and supply of both liquefied and compressed natural gas to the vehicle engine.

The system for storing and supplying gas to the vehicle’s engine includes a cryogenic gas cylinder 1, a pipe 2 connecting a cryogenic gas cylinder 1 with a device for filling it with LNG (not shown conditionally in the figure) through a check valve 3 and an inlet valve 4, as well as a pipeline 5 exiting from a cryogenic gas cylinder 1 and passing through the evaporator 6, while the pipe 5 is equipped with a safety valve 7, a shut-off valve 8, a check valve 9 and is connected to a pipe 10 through which gaseous gas enters the trans engine tailor means.

The system for storing and supplying gas to the vehicle’s engine also includes a CNG storage cylinder 11, a pipeline 12 connecting the cylinder 11 to the CNG filling device to a pressure of 20-32 MPa (not shown conventionally in the drawing). On the pipe 12 there is a check valve 13 and an inlet valve 14.

The cryogenic gas cylinder 1, the CNG storage cylinder 11 and the pipeline 10 through which gaseous gas enters the vehicle engine are connected by a pipe 15 equipped with a pressure gauge 16, a relief valve 17, a shut-off valve 18, a gas reducer 19 and a safety valve 20.

A shut-off valve 21 is installed in the pipeline section 15 connecting the CNG storage cylinder 11 and the cryogenic gas cylinder 1, and in the pipeline section 15 connecting the CNG storage cylinder 11 with the pipeline 10, through which gaseous gas enters the vehicle engine, are installed in series stopcock 22 and check valve 23.

The claimed system operates as follows.

For refueling a cryogenic gas cylinder 1 LNG pipeline 2 is attached to the flexible sleeve of a gas station or station (not conventionally shown in the drawing). Cranes 8 and 21 are closed, and the valve 4 is opened. After filling the cylinder 1 LNG valve 4 is closed.

To fill the CNG cylinder 11, the pipeline 12 is connected to the flexible sleeve of a gas station or station (not shown conditionally in the figure), the valve 18 is closed, and the valve 14 is opened. After filling the cylinder 11 CNG, the valve 14 is closed.

The system can supply natural gas to the engine either from a cryogenic gas cylinder 1, or from a cylinder 11 for storage of CNG.

To supply liquefied natural gas to the engine through the evaporator 6, first open the valve 8, and then the valves 18 and 21, while closing the shut-off valve 22. From the cylinder 11 for storage of CNG through the pipe 15 through the open valve 18, the gearbox 19, in which the gas pressure lower to a pressure of 1 MPa, and the open valve 21, the gas enters the cryogenic cylinder 1 and begins to displace LNG through the evaporator 6 to the engine. After the full consumption of LNG shut-off valves 8 and 21 are closed. If necessary, for further operation of the engine using compressed gas from cylinders 11. To supply compressed gas to the engine open the shut-off valve 22.

There are options for organizing the supply to the vehicle engine of only liquefied gas, or only compressed gas, depending on the presence of certain gas stations along the route of the transport.

The implementation of the proposed essentially dual-fuel system for storing and supplying gas to the vehicle engine will allow:

- increase the reliability and durability of the system;

- to provide the necessary range (vehicle power reserve) of vehicles, especially in conditions of a rare network of gas stations;

- reduce the cost of maintenance and repair of the system.

Claims (1)

A system for storing and supplying gas to the vehicle’s engine, including a cryogenic gas cylinder, a liquefied natural gas supply pipe to the evaporator, which is connected to a pipeline through which gaseous gas after the evaporator enters the vehicle’s engine, and equipped with shut-off and control valves, characterized in that the system is equipped with a compressed natural gas cylinder connected by a pipeline through a gas pressure reducing gear with a cryogenic gas cylinder and with a pipeline Through which gas enters the gas engine of the vehicle.

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