JPS5913326Y2 - Automated operation device for venturator of marine internal combustion engine - Google Patents

Description

[Detailed description of the invention] This invention is based on the automatic operation of the ventilator of a marine internal combustion engine equipped with a control device that maintains the intake air temperature of the internal combustion engine always below a certain temperature, which is installed in the engine room of the ship. It is related to the device.

Conventionally, in internal combustion engines mounted in the engine room of ships, the temperature rise in the narrow engine room not only prevents the engine from achieving its full performance, but also causes cooling water to overheat. A ventilator is installed to introduce fresh air into the cabin from the outside, but the capacity of the ventilator is set so that it can be used for long periods of time under the worst conditions in the engine room, i.e. in midsummer, with the entrance and exit to the wheelhouse sealed. Even when the internal combustion engine is operated at its maximum practical output, the temperature inside the engine room is set to be maintained between 35°C and 40°C. The fan motor consumes a very large amount of power, and the internal combustion engine has the disadvantage of increasing fuel consumption.

In particular, fishing boats, etc., operate their internal combustion engines at low load and low rotational speed during most of their operations, so naturally the rotational speed of the generator rotated by the internal combustion engine is also low, resulting in a lack of power generation capacity. If the system continues to operate for a long period of time in this state, it is expected that the battery will become discharged, which could lead to problems.

Furthermore, since the venturator fan motor switch is manually operated, if the switch is forgotten to be turned on, the temperature inside the engine room can become abnormally high, which can degrade the engine performance of the internal combustion engine as mentioned above and cause the cooling water to overheat. It may cause various troubles such as

Therefore, in order to eliminate the above-mentioned drawbacks of the conventional technology, the present invention controls the intake air temperature of the internal combustion engine installed in the engine room to be maintained below a certain temperature, and maintains the engine performance of the internal combustion engine at a good level. The purpose is to reduce consumption.

That is, the present invention provides, in the engine room of a ship having a venturator, a generator that energizes the fan motor of the venturator so as to be interlocked with the internal combustion engine, and a temperature sensor provided near the intake port of the internal combustion engine. At the same time, a control device is provided to turn on and off the fan motor of the venturator so as to maintain the intake air temperature below a certain temperature.

Embodiments of the present invention will be described below with reference to the drawings.

An internal combustion engine 1 in an embodiment of the present invention is installed in an engine room 3 of a ship, in which a venturator 2 is disposed above.

Fresh air from the outside is introduced into the engine room 3 through ventilation holes (not shown), and some of this air is supplied as intake air to the internal combustion engine 1 through the air intake port 11 of the intake manifold, while other air is supplied as intake air to the internal combustion engine 1. After absorbing heat from the heat generating portion of the internal combustion engine 1, the air is discharged to the outside of the engine room 3 by the fan motor 4 of the venturator 2.

Here, the fan motor 4 is rotated by a current generated by a generator 7 which is rotated from a drive pulley 5 of the internal combustion engine 1 via a belt 6 or by a power supply current of a battery 8 charged by the generator 7. An electric wire 9 and a battery switch 10 are disposed at.

Therefore, in the present invention, a temperature switch 1 as shown in FIG.
2 is attached.

When installing the temperature switch 12, the temperature switch 12 should be placed in an appropriate position, taking into consideration that the heat from the heat generating part of the internal combustion engine 1 will not affect a part of the temperature sensor due to heat conduction. It is important to attach the

As shown in FIG. 2, the temperature switch 12 in this embodiment has a wax pellet 13 sealed therein as a temperature sensor, and when the temperature rises, a piston 15 that can slide inside the casing 14 due to expansion is moved to the right side in FIG. Then, the spindle 16 presses the contact point of the limit switch 17 while pressing the spring 18, energizes the limit switch 17, and operates the fan motor 4 of the venturator 2. When a part of the temperature sensor falls below a certain temperature, the wax The pellet 13 contracts, the spindle 16 is returned to the left side by the elastic force of the spring 18, and the limit switch 17 cuts off the current to the fan motor 4, turning on the fan motor 4 of the venturator 2.・Constitutes a control device that turns off the power.

In addition to the wax pellet 13 described above, the temperature sensor of the present invention may be an ether expansion type, a thermocouple, a thermistor, a bimetal, etc., and when the intake air temperature exceeds a certain temperature, current is applied to the fan motor 4. If it has the function of operating a switch to force
Any temperature sensor will work.

According to the present invention, a generator is provided to energize the fan motor of the venturator in conjunction with an internal combustion engine installed in the engine room of a ship having a venturator, and a temperature sensor is installed near the intake port of the internal combustion engine. At the same time, a control device is installed to turn on and off the fan motor of the venturator to maintain the intake air temperature below a certain temperature, so the venturator can be operated most economically, and is the most economical method for marine internal combustion engines. It is possible to reduce fuel consumption.

In addition, there is no need to manually operate the switch of the venturator fan motor as in the past, and it is possible to prevent forgetting to turn on the switch, which prevents problems such as insufficient output of the internal combustion engine and overheating of the cooling water. Can be done.

Additionally, during long periods of low-speed load operation, such as during fishing boat operations, the amount of heat radiated from the internal combustion engine is small and the temperature inside the engine room drops, so the temperature switch is shut off, preventing the battery from discharging. Therefore, the battery capacity is smaller than that of the conventional type, which reduces battery costs and enables efficient continuation of long-term operation.

As described above, according to the present invention, the intake air temperature of the internal combustion engine installed in the engine room of a ship is controlled to be kept below a certain temperature, and the fuel consumption of the internal combustion engine is maintained while maintaining good engine performance. It is possible to provide an automatic operation device for a ventilator for a marine internal combustion engine that can reduce the amount of ventilator used in a marine internal combustion engine, and its practical effects are extremely significant.

The present invention can be effectively applied to an internal combustion engine installed in the engine room of a ship having a venturator, particularly an internal combustion engine of a small ship such as a fishing boat.

[Brief explanation of the drawing]

Fig. 1 is a partial cross-sectional layout side view of the main parts of an automatic operation system for a ventilator for an internal combustion engine installed in the engine room in an embodiment of the present invention, and Fig. 2 is an enlarged side sectional view of the temperature switch in Fig. 1. It is. 1... Internal combustion engine, 2... Ventulator, 3...
Engine room, 4... Fan motor, 7... Generator, 11
... Air intake of intake manifold, 12 ... Temperature switch, 13 ... Wax pellet, 17 ... Limit switch.

Claims (1)

[Scope of utility model registration request] In the engine room of a ship that has a venturator, a generator that energizes the fan motor of the venturator is installed in conjunction with the internal combustion engine, and a temperature sensor is installed near the intake port of the internal combustion engine. 1. An automatic operating device for a ventilator of a marine internal combustion engine, comprising a control device that turns on and off a fan motor of the venturator so as to maintain the temperature below a certain level.