JPH0521173U - Gas engine starting aid - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] In a gas engine, facilitates starting, shortens the starting time, and reduces the consumption of compressed air and electricity during starting. A normally closed regulator 3 is provided in a fuel supply line 12 of a compressed air starting type gas engine and is controlled to be opened and closed by using a supply pressure as a loading pressure. Via the starting solenoid valve 13, the primary pressure reducing valve 14, the secondary pressure reducing valve 15 and the check valve 16 provided in the sub-compressed air supply line 12, to the loading pressure line 7 of the regulator 3, compressed air for starting at the time of starting. Supply 10. [Effect] Since the fuel gas passage of the regulator is temporarily opened wide, the fuel gas required for starting is sufficiently supplied.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a starting assist device for a gas engine.

[0002]

[Prior Art]

 Conventionally, as a gas engine, as shown in FIG. 3, a fuel gas 1 is pressure-regulated by a normally closed regulator 3 of a fuel supply line 2 and mixed with a supply air 5 at a predetermined ratio by a carburetor 4, and then this mixture is mixed. Is supplied to the engine 6. The regulator 3 guides the supply pressure of the supply air 5 as the loading pressure to the regulator 3 through the loading pressure line 7 as a load adjustment parameter, while keeping the difference between the fuel gas pressure and the supply pressure constant. , It functions to change the fuel gas pressure according to the load.

[0003]

[Problems to be solved by the device]

 However, at the time of starting the engine 6, the charging pressure is hardly increased, the loading pressure is low, and the fuel gas passage of the regulator 3 is not sufficiently opened, so that the starting is difficult and the starting time becomes long. However, there is a problem that many boot failures occur. Therefore, the air consumption increases in the compressed air starting type gas engine, and the electricity consumption increases in the electric starting type gas engine.

Therefore, an object of the present invention is to provide a starting assist device for a gas engine, which can be easily started, the starting time can be shortened, and the consumption of compressed air and electricity can be reduced.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the first start-up assisting device of the present invention is provided with a normally closed regulator, which is controlled to be opened and closed by using a supply pressure as a loading pressure, in a fuel supply line of a compressed air starting type gas engine. The loading pressure line is provided with means for supplying compressed air for starting at the time of starting. In addition, the second start-up assisting device of the present invention is such that the fuel supply line of the electric start type gas engine is provided with a normally closed regulator which is controlled to open and close by using the supply pressure as a loading pressure, and a fuel bypass line which bypasses this regulator. In addition, a means for opening the fuel bypass line at the time of starting is provided.

[0006]

[Action]

 According to the first start-up assisting device of the present invention, the starting compressed air is supplied to the loading pressure line of the normally closed regulator when the compressed air starting type gas engine is started. As a result, the loading pressure becomes high, and the fuel gas passage of the regulator is temporarily opened greatly, so that sufficient fuel gas is supplied for starting and the starting performance becomes good. Further, in the second electric start type gas engine of the present invention, the fuel bypass line of the normally closed regulator is opened at the time of starting the electric start type gas engine. As a result, the fuel gas temporarily passes through the fuel bypass line, so that sufficient fuel gas for starting is supplied and the startability is improved.

[0007]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments. It should be noted that parts having the same configurations and functions as those of the conventional technique shown in FIG.

FIG. 1 shows an embodiment of a compressed air starting type gas engine. A sub compressed air supply line 12 is branched from a main compressed air supply line 11 that supplies the starting compressed air 10 to the engine 6, and the sub compressed air supply line 12 is connected to the loading pressure line 7. A starting solenoid valve 13 for supplying compressed air to the sub compressed air supply line 12 at the time of starting is provided at a branch portion between the main compressed air supply line 11 and the sub compressed air supply line 12. Further, in the sub-compressed air supply line 12, a primary pressure reducing valve 14, a secondary pressure reducing valve 15 and a check valve 16 for reducing the pressure of the compressed air to an appropriate pressure are sequentially installed from the starting solenoid valve 13 side.

With the above configuration, when the engine 6 is started, the starting solenoid valve 13 is opened and the starting compressed air is supplied from the sub-compressed air supply line 12 to the loading pressure line 7. As a result, the fuel gas passage of the valve portion 3a of the regulator 3 is temporarily opened greatly. Therefore, sufficient fuel gas for starting the engine 6 is supplied to the engine 6, which facilitates starting and shortens the starting time. Further, since the startability is improved, the consumption of the compressed air 10 for start-up is reduced, so that energy saving can be achieved.

FIG. 2 shows an embodiment of an electric start type gas engine. The fuel supply line 2 is provided with a fuel bypass line 20 that bypasses the normally closed regulator 3. The fuel bypass line 20 is provided with a small capacity normally open regulator 21 and a solenoid valve 22.

With the above configuration, the solenoid valve 22 is opened when the engine 6 is started. As a result, the fuel gas 1 temporarily passes through the fuel bypass line 20. Therefore, sufficient fuel gas is supplied to the engine 6 for starting, which facilitates starting and shortens the starting time. In addition, since the startability is improved, the consumption of electricity for starting is reduced, and energy can be saved.

[0012]

[Effect of the device]

 As is clear from the above description, the starting assisting device of the present invention is a compressed air starting type gas engine, which supplies starting compressed air to the loading pressure line of the regulator at the time of starting. Therefore, the fuel gas passage of the regulator is temporarily opened greatly, so that sufficient fuel gas is supplied for starting, the startability is improved, the starting time can be shortened, and the air consumption is reduced. In the case of an electric start type gas engine, the fuel bypass line of the regulator is opened at the time of starting. Therefore, since the fuel gas temporarily passes through the fuel bypass line, sufficient fuel gas is supplied for starting, the startability is improved, the starting time can be shortened, and the electricity consumption is reduced.

[Brief description of drawings]

FIG. 1 is a system diagram of a starting assist device according to a first embodiment of the present invention.

FIG. 2 is a system diagram of a starting assisting device according to a second embodiment of the present invention.

FIG. 3 is a system diagram of a conventional gas engine.

[Explanation of symbols]

2 ... Fuel supply line, 3 ... Normally closed regulator, 7
... loading pressure line, 12 ... sub compressed air supply line, 13 ... starting solenoid valve, 20 ... fuel bypass line, 22
…solenoid valve.

Claims (2)

[Scope of utility model registration request] 1. A fuel supply line of a compressed air starting type gas engine is provided with a normally closed regulator whose opening and closing are controlled by using a supply pressure as a loading pressure. A starting aid device for a gas engine, which is provided with a supplying means. 2. A fuel supply line of an electric start type gas engine is provided with a normally closed regulator which is controlled to be opened and closed by using a supply pressure as a loading pressure. A starting aid device for a gas engine, characterized in that opening means is provided.