JP7093579B1 - Engine cleaning method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an engine cleaning method capable of cleaning carbon deposited inside an engine with a small amount of cleaning gas in a short time. SOLUTION: Hydrogen gas is injected from a hydrogen gas generator 2 in a neutral state. Put the gear forward or backward. That is, the power unit 6 is connected to the operated engine 5. By supplying hydrogen gas to the engine 5 in a state where the power unit 6 is connected to the operated engine 5 (a state in which the gear is in the forward or reverse direction), the inside of the engine 5 is compared with the case of the neutral state. Hydrogen gas can flow in when the temperature of the fuel chamber is high, and the cleaning efficiency can be improved. [Selection diagram] Fig. 3

Description

The present invention relates to an engine cleaning method for cleaning an engine of a ship or the like.

In gasoline engines and diesel engines of ships, vehicles, generators, construction machinery, etc., carbon (burning residue of fuel) is deposited inside the engine according to the mileage.

Accumulation of carbon on the engine reduces fuel consumption, accelerates poorly, and makes an loud noise, causing engine malfunction.
Therefore, conventionally, the carbon deposited on the engine is removed and cleaned.

Conventionally, engine cleaning has generally been performed by disconnecting the engine of the power unit from the power unit and introducing cleaning gas in a neutral state to remove carbon deposited on the engine for cleaning.

However, there is a problem that it takes a long time to sufficiently remove carbon from the inside of the engine and a large amount of cleaning gas is required.

The present invention has been made to solve the above-mentioned problems of the prior art, and is used to reduce the amount of carbon deposited inside an engine such as a gasoline engine such as a ship, a vehicle, a generator or a construction machine, or an engine such as a diesel engine in a short time. It is an object of the present invention to provide an engine cleaning method capable of cleaning with.

In order to solve the above-mentioned prior art problems and achieve the above-mentioned object, the engine cleaning method of the present invention keeps hydrogen gas in the fuel chamber of the engine for a certain period of time in a state where the power unit is connected to the engine of the power unit. It has a first step of supplying and a second step of stopping the supply of the hydrogen gas after the first step, and in the first step, the power unit is not connected to the engine. A starting step for starting the engine in a state, a supply step for starting the supply of the hydrogen gas to the fuel chamber of the engine after the starting step, and a power unit connected to the engine after the supply step. It has a connection process to be performed.

Preferably, the hydrogen gas and air flow into the engine in response to the suction from the engine.

Preferably, in the first step, after a predetermined time elapses after the connection step, an additional predetermined time is determined based on the graphite discharged from the muffler and the horsepower of the engine, and the addition is performed. Further, the injection of the hydrogen gas is continued for a predetermined time.

Preferably, after the second step, there is further a third step of repeating running and stopping of the power unit.
Preferably, the power unit is a ship, and in the third step, the rotation of the screws of the ship is alternately repeated in a rotating state and a stopped state.

Preferably, the first step supplies hydrogen gas from the hydrogen generator to the engine.

Preferably, a hydrogen gas generating device for generating hydrogen gas is used, and the hydrogen gas generating device and the power device are separate devices.

According to the present invention, an engine cleaning method capable of cleaning carbon deposited inside a gasoline engine such as a ship, a vehicle, a generator, a construction machine, or an engine such as a diesel engine with a small amount of cleaning gas in a short time is provided. Can be provided.

FIG. 1 is a configuration diagram of an engine cleaning system 1. FIG. 2 is a diagram for explaining a mode in which hydrogen gas is introduced into an intake port of the engine 5. FIG. 3 is a flow chart for explaining the operation of the engine cleaning system according to the embodiment of the present invention.

Hereinafter, the engine cleaning system according to the embodiment of the present invention will be described.
FIG. 1 is a configuration diagram of an engine cleaning system 1.
In the engine cleaning system of the present embodiment, the hydrogen gas generator 2 supplied with electric power from the power source 3 supplies hydrogen gas (cleaning gas) to the engine 54 of the power unit (ship) to provide an engine. Perform the cleaning of 5.

The power supply 3 may be a power supply via an outlet or a mobile battery device, but it is preferable that the power supply 3 has a function of controlling the supplied current. Of course, instead of the power supply 3, the hydrogen gas generator 2 may have a function of controlling the current.

The power device is a variety of power devices having an engine as an internal combustion engine, and includes, for example, a gasoline engine such as a ship, a vehicle, a generator, and a construction machine, a diesel engine, and the like.

The power unit operates as a power unit by moving the power unit 6 connected to the engine 5. For example, when the power device 4 is a ship, the power unit 6 is a screw of the ship, and the rotation of the screw causes the ship to travel.

In the engine cleaning method of the present embodiment, hydrogen gas is supplied to the engine 5 to clean the engine in a state where the power unit 6 is connected to the operated engine 5 (a state in which the gear is in the forward or reverse direction). ..

In the present embodiment, hydrogen gas is supplied from the hydrogen gas generator 2 to the fuel chamber of the engine in a state where the engine 5 and the power unit 6 are connected.

FIG. 2 is a diagram for explaining a mode in which hydrogen gas is introduced into an intake port of the engine 5.
As shown in FIG. 2, hydrogen gas is supplied from the hydrogen gas generator 2 to the intake port 13 of the engine 5 via a hose 11 or the like, and is discharged through an exhaust unit 7 such as a muffler.
As shown in FIG. 2, the discharge port 13 of the hose 11 connected to the hydrogen gas generator 2 is placed at the intake port 13 of the engine 5.

The hydrogen gas is supplied for a time according to the horsepower (size) of the engine, and the supply time becomes longer as the horsepower increases.

In the engine cleaning method of the present embodiment, hydrogen gas is supplied to the engine 5 in a state where the power unit 6 is connected to the operated engine 5 (a state in which the gear is in the forward or reverse direction), so that the engine is in a neutral state. Compared with the case of the above case, hydrogen gas can flow in in a state where the temperature of the fuel chamber in the engine 5 is high, and the cleaning efficiency can be improved.

Hereinafter, the operation of the engine cleaning system according to the embodiment of the present invention will be described.
FIG. 3 is a flow chart for explaining the operation of the engine cleaning system according to the embodiment of the present invention.

Step ST1:
Secure the ship to the quay.

Step ST2:
Start the engine 5 of the ship.

Step ST3:
Hydrogen gas is injected from the hydrogen gas generator 2 in the neutral state.

Step ST4:
Put the gear forward or backward. That is, the power unit 6 is connected to the operated engine 5. As a result, the temperature in the fuel chamber of the engine 5 becomes higher than in the neutral state.
When in neutral, the coolant temperature gauge of the ship shows 60 ° C, but when sailing, it shows 80 ° C, and when not in gear, it shows 65 to 70 ° C. By raising the water temperature (that is, the temperature of the engine 5) in this way, the time for hydrogen gas to decompose carbon in the engine 5 is shortened. As a result, the consumption of hydrogen gas can be reduced.
The hydrogen gas injection amount is, for example, liter / hour.

Step ST5:
It is confirmed whether the predetermined time has elapsed, and if it has elapsed, the process proceeds to step ST6.

Step ST6:
The state of carbon removal in the fuel chamber of the engine 5 by hydrogen gas is confirmed, and the next predetermined time is determined. At this time, the black smoke emitted from the muffler is checked while being automatically recognized by an image or the like, and the time for additionally injecting hydrogen is determined according to the horsepower of the engine 5.

The hydrogen gas injection time is set as follows, for example, according to the horsepower of the engine 5.
200 horsepower or less ⇒ 1 hour 30 minutes in total
200-350 horsepower ⇒ 2 hours
350-500 horsepower ⇒ 2 hours 30 minutes 500 horsepower-1000 horsepower ⇒ 3 hours

Step ST7:
It is determined whether or not the additional time determined in step ST6 has elapsed, and if it is determined that the additional time has elapsed, the process proceeds to step ST8.

Step ST8:
After the work is completed, the ship is repeatedly run and stopped, and the carbon inside the combustion chamber decomposed by hydrogen gas is discharged from the muffler. After that, the work is finished.
Specifically, the ship (power measure) is repeatedly started and stopped by rotating the screw. As a result, a load is applied to the combustion chamber of the engine 5, carbon is peeled off, and the carbon is discharged to the outside of the engine 5.

If the carbon accumulation is too severe or if heavy oil is used as fuel, the equipment will be loaded on the ship and hydrogen gas will be injected to remove it.

As described above, according to the engine cleaning method of the present embodiment, a small amount of carbon deposited inside a gasoline engine such as a ship, a vehicle, a generator, a construction machine, or an engine such as a diesel engine is reduced in a short time. It becomes possible to wash with.

That is, in the engine cleaning method of the present embodiment, hydrogen gas is supplied to the engine 5 in a state where the power unit 6 is connected to the operated engine 5 (a state in which the gear is in the forward or reverse direction). Compared with the case of the neutral state, hydrogen gas can flow in in a state where the temperature of the fuel chamber in the engine 5 is high, and the cleaning efficiency can be improved.

The present invention is not limited to the embodiments described above.
That is, one of ordinary skill in the art may make various modifications, combinations, sub-combinations, and substitutions with respect to the components of the above-described embodiments within the technical scope of the present invention or the equivalent thereof.

For example, in the above-described embodiment, the method of cleaning the engine of a ship is exemplified, but in addition to the ship, cleaning of a gasoline engine or a diesel engine of a vehicle, a generator, a construction machine, or the like may be performed in the same manner.

Further, in the above-described embodiment, the ship is fixed to the quay in step ST1 shown in FIG. 3, but it may be carried out during traveling.

INDUSTRIAL APPLICABILITY The present invention is applicable to an engine cleaning method for a gasoline engine or a diesel engine of a ship, a vehicle, a generator, a construction machine, or the like.

2 ... Hydrogen gas generator 3 ... Power supply 5 ... Engine 6 ... Power unit 7 ... Exhaust unit

Claims (7)

The first step of supplying hydrogen gas to the fuel chamber of the engine for a certain period of time with the power unit connected to the engine of the power unit, and
After the first step, the second step of stopping the supply of the hydrogen gas is provided.
The first step is
A starting process for starting the engine when the power unit is not connected to the engine, and
A supply step of starting the supply of the hydrogen gas to the fuel chamber of the engine after the start step, and a supply step of starting the supply of the hydrogen gas to the fuel chamber of the engine.
An engine cleaning method comprising a connection step of connecting the power unit to the engine after the supply step. The engine cleaning method according to claim 1, wherein the hydrogen gas and air flow into the engine in response to suction from the engine. The first step is
When a predetermined time elapses after the connection step, an additional predetermined time is determined based on the graphite discharged from the muffler and the horsepower of the engine, and the injection of the hydrogen gas is continued for the additional predetermined time. The engine cleaning method according to claim 2 . The engine cleaning method according to any one of claims 1 to 3, further comprising a third step of repeating running and stopping of the power unit after the second step. The power unit is a ship
The engine cleaning method according to claim 4, wherein the third step alternately repeats the rotation of the screw of the ship in a rotating state and a stopped state. The first step is the engine cleaning method according to any one of claims 1 to 5, wherein hydrogen gas from a hydrogen generator is supplied to the engine. The engine cleaning method according to any one of claims 1 to 6, wherein a hydrogen gas generating device for generating hydrogen gas is used, and the hydrogen gas generating device and the power device are separate devices.

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