JPS5941303Y2 - Alarm device for agricultural machinery tower-mounted internal combustion engine - Google Patents

Description

[Detailed description of the invention] This invention relates to the improvement of internal combustion engines installed in agricultural machines, and more specifically, the invention relates to the improvement of internal combustion engines installed in agricultural machines, and more specifically, the cooling water for internal combustion engines during agricultural operation.
This invention relates to an alarm device for an internal combustion engine that detects the status of fuel, lubricating oil, etc. and notifies the driver of any abnormalities.

Traditionally, agricultural machines equipped with internal combustion engines such as horizontal water-cooled diesel engines, especially self-propelled machines such as tillers and tillers, are checked for abnormalities in the cooling water level, fuel level, lubricating oil pressure, etc. Since there are no detectors installed, detection of these abnormalities currently relies solely on the driver's intuition. Therefore, if the cooling water runs out or the lubricating oil pressure drops, the engine Seizure and abrasion of the sliding parts due to overheating may become severe, leading to problems such as engine damage.

In addition, a method of frequently checking the engine status during operation, other than during work inspections, may be considered, but in this case, agricultural work would have to be interrupted each time, which would significantly reduce work efficiency. Contains.

The present invention was developed to address the problems that conventional internal combustion engines installed in agricultural machinery had, as mentioned above.
A detector is installed to detect the fuel level and lubricating oil pressure, and each of these detectors is connected to a display to detect a drop in the level of cooling water and fuel, or a drop in the pressure of lubricating oil, and an alarm system is installed to notify an abnormality. In the internal combustion engine mounted on agricultural machinery, the cooling water level detector is suspended from an upper wall surface of a cylindrical water replenishment port member that projects diagonally upward and outward from a cooling water replenishment port of the engine body. an opening at the upper edge of the side cover of the oil gear rally, in which the fuel level detector is installed inward from the bottom of the fuel tank, and the lubricating oil pressure detector is bored in the side cover on the side surface of the engine body; It is located at the point where it is attached.

Hereinafter, the specific contents of the present invention will be explained in detail with reference to the embodiments shown in the attached drawings. Fig. 1 shows the external appearance of an agricultural machine equipped with an internal combustion engine equipped with an alarm device according to the present invention. The agricultural machine is integrally constituted by three parts: a driving part A, a tilling part B which receives driving force from the driving part A, and a running part C.

The plowing section B has built-in plows of various types such as rotary type, crank type, and screw type, while the handle 1 is attached to the running section C, which consists of the handle 1 and wheels 2, etc. A display section 4 is attached to the upper part of the handle cover 3 so that it can be easily seen by the operator while driving the engine, which receives signals from detectors attached to various parts of the engine and notifies abnormalities by emitting light and making sounds. ing.

Further, as shown in FIG. 2, the driving part A has a fuel tank 7, a condenser 8, etc. built into the bonnet 6 that covers the upper part of the engine body 5, and a measuring part of the engine is installed on the control side of the engine body 5. A covering side cover 9 is attached,
A lubricating oil pump 10 for supplying lubricating oil to the sliding parts of the engine is attached to the side cover 9, and a cylinder head 11 located on the rear side of the engine 5 is equipped with a cooling oil pump provided inside the engine. A replenishment port 12 communicating with the water jacket is attached.

In the figure, 13 is a tank cover that protects the fuel tank γ, 14 is a fuel cock attached to the bottom of the fuel tank 7,
Reference numeral 15 indicates an oil filler port provided on the engine side lid 9, 16 indicates an intake pipe, 1γ indicates a cleaner cover attached to the inlet of the intake pipe 16 to protect the air cleaner, and 18 indicates a cover for protecting the air cleaner from muddy water or hot air. A suction prevention part 19 for preventing inhalation is an exhaust pipe projecting above the bonnet 6.

Figures 3 to 5 show various aspects of the detection device installed at predetermined locations on the agricultural internal combustion engine shown in Figure 2, and Figure 3 shows the cooling water level detection device;
The figure shows an example of a fuel level detection device, and FIG. 5 shows an example of a lubricating oil pressure detection device.

First, to explain the cooling water level detection device shown in FIG. The detector mounting pipe 21 is formed to be branched as shown in FIG.
A water amount detector 22, which includes a water level detection thermistor 22c and a temperature compensation thermostat 22d, is screwed and fixed at the lower end of the cooling water, and when the cooling water is at a normal water level, the water level detection thermistor 22c If both the temperature compensation thermistor 22d and the temperature compensation thermistor 22d are submerged below the liquid level and the cooling water decreases to an abnormal water level, the temperature compensation thermistor 22d will be exposed above the water surface and will be located approximately below the water level detection thermistor 22c. It is arranged so that half of it is immersed in cooling water.

The cooling water level detection device has the above-mentioned configuration, and when detecting the water level, the difference in specific resistance between the water level detection thermistor 22c and the temperature compensation thermistor 22d is affected by the temperature of the cooling water. Since the water level changes depending on whether the water level is normal or abnormal, this change is used to extract the electrical signal that is emitted in the case of abnormal water level, transmit it to the alarm, energize the alarm, and turn on the lamp. A light or buzzer sounds to notify you of a drop in the cooling water level.

Although a thermistor is used as the water level detector in this embodiment, a similar operation can be achieved by using a detector consisting of a combination of a float and a reed switch.

Next, to explain the fuel level detection device shown in FIG.
A fuel level detector 24 having a liquid level detecting servo star 24c secured thereto is screwed to the upper end of a support ring 24b extending upward from the fuel level detector 24b.

And the thermistor 24 for liquid level detection used here
c is a negative characteristic thermistor whose self-resistance decreases dramatically when the temperature range reaches The upper half of the section is placed at a height that is exposed above the liquid surface.

In the figure, 25 is a mounting seat for a fuel filter attached to the bottom of the tank, and 26 is a liquid level gauge attached to the tank together with the detector to enable visual monitoring of the liquid level.

When the fuel level detection device detects the fuel level, when there is sufficient fuel in the tank T, the detection thermistor 24c is submerged below the liquid level, but once the fuel in the tank γ decreases. When the upper half of the liquid level detection thermistor 24c appears above the liquid surface, the thermistor 24c self-heats due to the weak current flowing through it, and its specific resistance decreases, causing the current to flow toward the alarm. It notifies you of a drop in the fuel level by turning on a lamp or sounding a buzzer.

Although this embodiment shows a case where the liquid level is detected using a negative characteristic thermistor, in addition to the above embodiment, the water level detection sensor shown in Fig. 3 can also be used as a fuel level detector. □It is of course possible to use a detector consisting of a combination of a star and a temperature compensation thermistor, or a detector consisting of a float and a reed switch.

Furthermore, the lubricating oil pressure detection device shown in FIG. 5 has one end opened on the side of the oil filter 28 mounted below, and the other end opened on the side of the lubricating oil pump inside the side cover 9 attached during engine operation. a first oil passage 2γa that opens on the suction side of 29;
A second oil passage 2γb whose one end opens to the discharge side of the lubricating oil pump 29 and whose other end opens to the upper edge of the side cover 9, and a cylinder block (not shown) that is orthogonal to the second oil passage 27b. An oil gear rally 27 consisting of a third oil passage 27c leading to a crankshaft sliding portion, etc. is bored, and the upper edge of the side cover of the second oil passage 27b, which is a part of the oil gallery IJ-27, is bored. A lubricating oil pressure detector 31 is screwed and fixed to the opening 30 .

The lubricating oil detector 31 has a built-in diaphragm biased toward the pressure side by an adjustment spring and a switch that turns on and off according to the operation of the diaphragm. When the pressure of the lubricating oil sent to the sliding parts of the engine falls below a predetermined pressure, the balance between the biasing force of the adjustment spring that presses the diaphragm and the oil pressure is lost, an internal switch is turned on, and the alarm is activated. When the lubricating oil pressure is energized, the driver is notified of an abnormality in the lubricating oil pressure by lighting a lamp or sounding a buzzer.

Note that the three detection devices described above are used to detect the cooling water level,
It detects abnormalities in fuel level and lubricating oil pressure and converts them into electrical signals to activate an alarm. However, the detection device may be other than those listed in this embodiment, such as detecting battery charging voltage. 1. It is also suitable to install a device that detects the temperature of the cooling water and reports any abnormalities in order to protect and manage the engine.

As described above, in the alarm device of the present invention, the cooling water level detector is suspended from the upper wall of the cylindrical water replenishment boat member that projects diagonally upward and outward from the cooling water refill port of the engine body. Since the sensor is mounted in the same way, there is no need to prepare a separate casing to house the detector, and the mounting part does not require high watertightness, so the number of parts required for installation and ensuring watertightness can be reduced. This has the effect of suppressing the increase.

In addition, the fuel level detector is installed vertically from the bottom of the fuel tank toward the inside, making use of the dead space between the fuel tank and the top of the engine body, which prevents the detector connection terminal from being exposed to the outside. The height of the detector is limited to the height from the bottom of the tank to the lower limit of the liquid level, resulting in compactness.

Furthermore, in the present invention, since the lubricating oil pressure detector is attached to the drill hole opening for forming the oil gear rally provided on the upper edge of the engine side lid, the drill hole opening is closed by the detector. By using the detector as a blind plug, the blind plug can be omitted and the detector can be easily installed.

Furthermore, by placing the display section on the steering wheel that indicates abnormalities detected by the detector, the operator can monitor this at any time while driving, and it can be used for inspections like the internal combustion engine installed in conventional agricultural work. There is no need to interrupt work each time,
It improves work efficiency and facilitates work inspections.
It also has the advantage of making it easier to ensure safe driving.

In addition, abnormalities in cooling water, fuel, and lubricating oil can be detected using rungs and buzzers, so even those who do not have knowledge of conventional inspection work procedures can monitor abnormalities and inspect cooling water, etc. It also has the advantage of preventing burns during accidents.

[Brief explanation of the drawing]

Figure 1 is an external perspective view of a farm machine equipped with the alarm system of the present invention, Figure 2 is a surface survey showing the driving part of the machine, and Figure 3 is the cooling water level that forms part of the alarm system of the present invention. FIG. 4 is a schematic diagram showing an example of a fuel level detection device, and FIG. 5 is a schematic diagram showing an example of a lubricating oil pressure detection device. 4...display section, 5...engine body,
T...Fuel tank, 9...Side cover, 12
... Cooling water refill port, 20 ... Water replenishment port member, 22 ... Cooling water level detector, 24
...Fuel level detector, 2T...Oil gallery IJ-130...Side lid upper edge opening, 3
1...Lubricating oil pressure detection device.

Claims (1)

[Scope of utility model registration request] Detectors are installed to detect the cooling water level, fuel level, and lubricating oil pressure, and these detectors are connected to the display to detect a drop in the cooling water and fuel level, or a drop in the lubricating oil pressure, and alert you to any abnormalities. In the internal combustion engine mounted on agricultural machinery, the cooling water level detector is installed on the upper wall surface of a cylindrical water filling port member that projects diagonally upward and outward from the cooling water filling port of the engine body. The oil gear rally is mounted in a hanging state from the bottom of the engine body, the fuel level detector is installed vertically from the bottom of the fuel tank toward the inside, and the lubricating oil pressure detector is bored in the side cover of the surface of the engine body.
An alarm device for an internal combustion engine mounted on an agricultural working machine, characterized in that the alarm device is attached to the upper edge opening of the side cover.