JPH0143498Y2 - - Google Patents

Description

[Detailed explanation of the idea] This invention relates to gas engines.

First, a conventional example will be explained with reference to FIG.
A gas engine main body 2 is installed in the engine room 1. A gas supply passage 3 communicating with a gas supply source (not shown) is connected to the gas engine main body 2 .
A diaphragm type regulator 4 is installed in the gas supply path 3.
is interposed, and the air supply path 6 of the intake muffler 5 installed in the engine room 1 is connected to the regulator 4.
are merged downstream. The exhaust passage 7 of the gas engine body 2 is connected to an exhaust muffler 8 installed in the engine room 1.
It is connected to the. An exhaust port 9 of the exhaust muffler 8 is opened to an external space 10 of the engine room 1. Note that a throttle valve 11 is interposed in the gas supply path 3 close to the gas engine main body 1. In addition, in the regulator 4, in the figure, 40 is a diaphragm, 41 is an adjustment chamber, 42 is a subchamber, 43 is a valve seat, 4
4 is a valve body, 45 is an arm, 46 is a fulcrum of the arm,
47 indicates a spring. Conventionally, the auxiliary chamber 42 of the regulator 4 is
It was an open to atmosphere type (zero governor type) that communicated with the internal space 12 of the engine room 1 via the engine room 1. Therefore, if the diaphragm 40 is damaged due to long-term use or aging, the gas flowing through the gas supply path 3 will leak from the adjustment chamber 41 into the internal space 12 of the engine room 1 through the vent 48 of the auxiliary chamber 42. There was a risk that it would happen.

Therefore, in view of the above-mentioned conventional drawbacks, the purpose of this invention is to provide a gas engine that can avoid gas leakage into the internal space of the engine room due to damage to the diaphragm of the diaphragm type regulator in the engine room. The goal is to provide the following.

In order to achieve the above object, this invention connects one end of the connecting pipe to the vent of the diaphragm type regulator in the engine room, and connects the other end of the connecting pipe to a space separated from the internal space of the engine room. The purpose of this system is to prevent gas from leaking into the internal space of the engine room by allowing gas leaking from the vent due to damage to the diaphragm to flow through the connecting pipe.

An embodiment of this invention will be described below with reference to FIG. Since this example is an improvement over the conventional example, the same parts as those in the conventional example are denoted by the same reference numerals, and the explanation thereof will be omitted, and different configurations will be explained in detail. One end 14 of a connecting pipe 13 is connected to the vent 48 of the regulator 4, and the other end 15 of the connecting pipe 13 communicates with the external space 10 of the engine room 1. Note that a buffer tank 16 is interposed in this connecting pipe 13. In addition, an ion plug 17 is installed inside the cylinder of the gas engine main body 2, and an ammeter 18 detects the ion current generated by the explosion of fuel inside the cylinder and changes in accordance with the engine speed. The operating status of the gas engine main body 2 can be grasped, and the engine speed can be detected with better response than when detecting the engine speed by picking up the shaft speed.

According to the above-mentioned gas engine, if the diaphragm 40 of the regulator 4 is damaged and gas leaks into the subchamber 42,
Even if the leaked gas leaks to the engine room 1, the leaked gas is discharged to the external space 10 of the engine room 1 through the connecting pipe 13, so that gas leakage to the internal space 12 of the engine room 1 can be avoided.

Note that, as shown in FIG. 3, even if the other end 15 of the connecting pipe 13 in the above embodiment is replaced with the external space 10 and is connected to the gas supply path 3 on the upstream side of the regulator 4, the inside of the engine room 1 is Gas leakage into the space 12 can be avoided. In this case, when the gas pressure decreases, the pressure in the auxiliary chamber 42 decreases, and the valve body 44 closes, cutting off the gas supply and stopping the operation of the engine body 2. It is also possible to prevent the risk of explosion caused by the gas engine main body 2 absorbing air from gas appliances such as gas stoves and water heaters connected to the upstream side of the passage 3.

Further, as shown in FIG. 4, in a gas engine in which a turbocharger 19 is interposed in the air supply path 6 and the exhaust path 7, the other end 15 of the connecting pipe 13 of the above embodiment is replaced with the external space 10 for air supply. Even if the passage 6 is connected to the downstream side of the turbocharger 19, gas leakage into the internal space 12 of the engine room 1 can be avoided. In this case, the operation of the gas engine main body 2 is stopped because the fluctuation in the mixture ratio of gas and air becomes large. Also, turbo charger 19
As the amount of supercharging air increases, the pressure in the auxiliary chamber 42 of the regulator 4 increases, and the amount of gas supplied increases, making it easy to adjust the mixing ratio and obtain high output and torque. can.

That is, in this invention, one end of the connecting pipe is connected to the vent of the diaphragm type regulator in the engine room, and the other end of the connecting pipe is connected to a space separated from the internal space of the engine room. By allowing gas leaking from the vent due to damage to the diaphragm to flow through the connecting pipe, gas leakage into the internal space of the engine room can be avoided.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of a conventional gas engine;
The figure is a schematic diagram of a gas engine showing an embodiment of this invention, and FIGS. 3 and 4 are schematic diagrams of gas engines showing modifications of the embodiment, respectively. 1...Engine room, 2...Gas engine body, 3...
...Gas supply path, 4...Regulator, 6...Air supply path, 10...External space, 12...Internal space,
13...Connecting pipe, 40...Diaphragm, 42...
...Auxiliary chamber, 48...Vent, 3, 6, 10...Space section.

Claims (1)

[Scope of utility model registration request] The gas engine is a gas engine in which a diaphragm type regulator is interposed in the gas supply path from the gas supply source to the gas engine body in the engine room housing the gas engine body and its auxiliary equipment, and furthermore,
A gas engine characterized in that one end of a connecting pipe is connected to a vent provided in a subchamber of a regulator, and the other end of the connecting pipe is connected to a space separated from an internal space of an engine room.