JP5093738B2 - Auxiliary device for improving actual combustion efficiency and startability of LPG internal combustion engine under freezing point - Google Patents

Description

  The present invention relates to an auxiliary device for improving the actual combustion efficiency and startability of an LPG internal combustion engine below freezing point.

  As a by-product of refining crude oil, LPG is a fuel that is significantly cheaper than gasoline, has less carbon monoxide, and is a surplus fuel that is currently generating surpluses all over the world. By saying that it will be longer, LPG imports began in 1956, and in Japan, it is used for homes, taxis, etc., and it can be used as clean energy to prevent global warming. It can be the next generation trump card.

  As a device that can achieve complete combustion, such as fuel economy, reduction of black smoke, increase of output, etc., by using LPG and LNG in diesel engines that use diesel oil and gasoline, LPG, and methanol vehicles, the present applicant has disclosed Patent Document 1. In connection with this invention, Patent Document 2 and Patent Document 3 were proposed.

  Removed the disadvantages of internal combustion engines that use LPG, and used high-efficiency internal combustion engines that use them all over the world to prevent global warming, regardless of the outside air temperature. It was put in.

In addition, in the graph of the change in vapor pressure depending on the temperature on page 73 of [Non-Patent Document 1], it is also clearly stated that the method of use is limited due to the characteristics of the liquefied gas that depends on the outside air temperature.
Shoko 61-10664 JP 9-3-302 Design registration No. 745745 LP Gas Vehicle Structure Handling Standards Japan LP Gas Vehicle Study Group issued on March 17, 1989

  However, in LPG, butane, which is suitable for in-vehicle use and has high safety, because of its boiling point, the vapor pressure disappears when it is below freezing point, and LPG cannot be taken out from the cylinder. It may be necessary to adjust the LPG mixture depending on the season, or it may be necessary to adjust the supply equipment due to changes in pressure. Even if the vapor pressure increases, in the case of an LPG car in a cold region, the engine cannot start or the engine is malfunctioning due to cooling freezing when the engine temperature is low and the hot water temperature does not rise from the latent heat of vaporization. In fact, there are many things that fall into the process, which is insufficient.

In [Patent Document 3], the methanol engine starter directly heats the fuel directly under the throttle valve, but the required power is high, and it heats and heats up unnecessary parts, so there is no auxiliary battery function. There is concern about the lack of money, and it is insufficient.

The present invention is intended to solve the problems of the conventional configuration as described above, and an LPG connected to an internal combustion engine from an LPG cylinder via a vaporizer from a freezing point in an extremely cold region. in an internal combustion engine that uses the LPG with a supply pipe, the LPG amount needed during warmup, leave automatically filled in the auxiliary startup cylinder which is arranged in the middle of the LPG supply pipe, a vehicle battery In a small container with a built-in heat insulation heater wrapped in thermal insulation, using a battery for the heat insulation heater that does not affect the heat, it is heated by the action of the relay with the first pressure detection switch, generating steam pressure and emergency shut off The valve is opened, the internal combustion engine is actually operated, the LPG cylinder is heated by a hot water heater for cooling water by warm-up operation, the vapor pressure is increased, and a relay with a second pressure sensing switch is used. Under the control of the hot water heater, the low temperature shut-off valve is opened to allow normal operation.

  The effect | action by the said problem-solving means is as follows. That is, when the boiling point of the LPG falls and the vapor pressure of the LPG cylinder disappears, only the auxiliary auxiliary cylinder that is filled in the amount that warms up the internal combustion engine is heated by the auxiliary heater, so that waste of electric power is prevented. For the vehicle battery, since the internal combustion engine starts and the negative pressure switch that senses negative pressure is connected by operating the battery connection relay, the dynamo of the internal combustion engine works and the vehicle battery The waste of electric power necessary for starting at low temperatures, which does not affect the battery and lowers the specific gravity of the battery, is also prevented.

The auxiliary cylinder for start-up is automatically filled with LPG, and the low-temperature shut-off valve that works via the relay with the second pressure sensing switch prevents backflow to the LPG cylinder when no steam pressure is generated at low temperatures. By opening the preventive emergency shut-off valve , LPG is pressurized and supplied to the internal combustion engine side.

  The auxiliary heater of the auxiliary cylinder for start-up uses a relay with the first pressure detection switch to operate only when there is no vapor pressure of the auxiliary auxiliary cylinder for start-up, and the temperature is detected inside a small container sealed with thermal insulation. The LPG container is heated by the hot water heater provided in the LPG container only when there is no vapor pressure by the relay with the second pressure sensing switch, and the LPG cylinder container is controlled safely.

  As described above, the auxiliary combustion efficiency and startability improving auxiliary device for an LPG internal combustion engine of the freezing point of the present invention improves the startability of the internal combustion engine in winter and in a very cold region and is not affected by the outside air temperature. It is possible to provide an internal combustion engine with high actual combustion efficiency that enables regular operation of a diesel generator or the like. Until the dynamo of the internal combustion engine works, the vehicle battery is not affected, and the startability is further improved at low temperatures when the specific gravity of the battery decreases.

  After starting the internal combustion engine, the LPG cylinder container is heated by the built-in hot water heater only when there is no vapor pressure by the relay with the second pressure detection switch, so if the internal combustion engine is started even in extremely cold weather When the steam pressure is stopped at any time even during traveling, the low temperature shut-off valve is closed and the inside of the LPG cylinder container is heated so that the steam pressure can be generated.

  The auxiliary cylinder for start-up is always automatically filled, and when the vapor pressure drops by the relay with the first pressure detection switch, it is heated by the auxiliary heater, and the vapor pressure is in a small container sealed with heat insulation with high heat insulation. Is in a state where it is difficult to lower, and LPG can be supplied immediately.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
In the figure, reference numeral 1 denotes a small container that contains a heat insulating material and is provided with a drain.
2 is a battery for a supplementary heater. 3 supplementary heaters are wrapped in 4 auxiliary cylinders and stored in 1 small container, and 19 LPG supply pipes are in front of 13 emergency shut-off valve. It is connected to.

The relay with 5 first sensing pressure switches heats the 3 auxiliary heaters using the ACC accessory power source of the 17 key switch from the 7 vehicle battery as a signal current.

  When the 16 internal combustion engine is started, the 6 negative pressure switch is grounded, and 7 vehicle batteries and 2 auxiliary heater batteries are connected by 8 battery connection relays. 11 relay with 2nd sensing pressure switch uses IG ignition power supply of 17 key switch as signal line, but unless it detects the steam pressure of 10LPG cylinder, it stops 12 low temperature shut-off valve and 9 hot water heater It is designed to operate.

Reference numeral 13 denotes an emergency shut-off valve attached to the vaporizer side of the internal combustion engine. Reference numeral 14 denotes a vaporizer for the internal combustion engine. A hot water hose of the internal combustion engine 15 is also connected to a hot water heater 9.

Hereinafter, the operation of the above configuration will be described.
If the outside air temperature drops below the boiling point of the LPG below the freezing point, the vapor pressure disappears from the 10 LPG cylinder and the auxiliary cylinder for starting 4 and the LPG cannot be taken out, the 17 key switch can be set to ACC to operate the 16 internal combustion engine. , 120W10A, 3 heat-suppressing heaters that keep the surface temperature at about 50 degrees with an overheat prevention thermostat, and a heat-resistant insulation material with a thickness of 100 mm that is highly flame-retardant, and a small container 1 equipped with an emergency drain Inside is an auxiliary cylinder for 4 starters with a capacity of 3000 cc equipped with an emergency safety valve, but the battery is heated by using the battery for 2 auxiliary heaters as the power source, the vapor pressure rises, and the relay with 5 first sensing pressure switch but 3 if caused to start the 16 internal combustion engine by opening the Honetsu 13 emergency shutoff valve heater is stopped, 6 pressure switch is grounded, 8 battery connection Laser is a 2 Honetsu battery heater and connecting the 7 vehicle battery, in the 16 internal combustion engine dynamo, a battery for 2 Honetsu heater comes to complement the charging.

    When the 16 internal combustion engine is started, the relay with 11 second sensing pressure switch activates the 9 warm water heater with the ignition IG signal current of the 17 key switch. At this time, the 12 low temperature shut-off valve is closed, but when the water temperature of the 16 internal combustion engine rises and the hot water starts to flow around the 15 hot water hose, the 9 hot water heater warms the interior of the 18 LPG cylinder container and steam pressure is generated in the 10 LPG cylinder. , 11 The relay with the second sensing pressure switch stops the 9 warm water heater, opens the 12 cold shut-off valve, passes through the 13 emergency shut-off valve from the 19 LPG supply pipe, and enters normal operation.

  When the vapor pressure of the 10LPG cylinder disappears even when parked or stopped due to a drop in the outside air temperature, the relay with 11 second sensing pressure switch turns on the 9 hot water heater, closes the 12 low temperature shutoff valve, and starts 4 LPG is supplied from the auxiliary cylinder to the 16 internal combustion engine. 1 Small container is wrapped in 100 mm thick heat insulation with high flame resistance, 5 Relay with 1st sensing pressure switch automatically activates 3 supplementary heaters when vapor pressure disappears Therefore, since the heat retention is several steps higher than that of the 10 LPG cylinder, the engine stall is difficult, and the 9 hot water heater can sufficiently recover the vapor pressure of the 10 LPG cylinder. As described above, according to this embodiment, the effect of improving the actual combustion efficiency and startability of the LPG internal combustion engine below freezing can be obtained.

Configuration diagram of auxiliary assist device for improvement of actual combustion efficiency and startability of LPG internal combustion engine under freezing point

DESCRIPTION OF SYMBOLS 1 Small container 2 Battery for supplementary heater 3 Supplementary heater 4 Auxiliary cylinder for starting 5 Relay with first sensing pressure switch 6 Negative pressure switch 7 Vehicle battery 8 Battery connection relay 9 Hot water heater 10 LPG cylinder 11 With second sensing pressure switch Relay 12 Low temperature shutoff valve 13 Emergency shutoff valve 14 Vapor riser 15 Hot water hose 16 Internal combustion engine 17 Key switch 18 LPG cylinder container 19 LPG supply piping

Claims (1)

In LPG vehicles that use LPG and internal combustion engines that co-fire LPG in diesel engines, this occurs because the vapor pressure disappears from the LPG cylinder below the freezing point due to the boiling point that is a characteristic of LPG that depends on the outside air temperature, and LPG cannot be removed In order to prevent start-up or decrease in actual combustion efficiency, heat insulation is installed in a small container equipped with a drain, and the operation is controlled by an overheat prevention thermostat that uses a battery for a reheating heater as a power source. A low temperature shut-off valve disposed on the LPG cylinder side of the LPG supply pipe connected to the internal combustion engine from the LPG cylinder to the internal combustion engine with a safety valve equipped with a safety valve that is heated by a heater Start by the operation of the relay with the first pressure sensing switch installed in the LPG supply pipe between the emergency shut-off valves arranged on the vaporizer side A vacuum switch was attached to the intake manifold or negative pressure tank to activate the internal combustion engine by opening the emergency shut-off valve and operating the internal combustion engine. As a result, the battery connection relay is activated to connect the vehicle battery and the supplementary heater battery, and while charging the supplementary heater battery with the dynamo of the internal combustion engine, the inside of the LPG cylinder container incorporating the hot water heater Is detected by the relay with the second pressure detection switch arranged in the LPG supply pipe between the LPG cylinder and the low temperature shut-off valve , the warm water heater is activated to warm up the steam, and when the vapor pressure is generated in the LPG cylinder, the second pressure The hot water heater is stopped by the detection of the relay with the detection switch, and the low temperature shut-off valve is opened, and the emergency shut-off valve that has already been opened is passed. Thus, an auxiliary device for improving the actual combustion efficiency and startability of the LPG internal combustion engine that allows the LPG to be taken out of the LPG cylinder and allows normal operation.

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