JPH0235593Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vehicle running on rough terrain, and in particular, by arranging the air intake port of the air cleaner at a high position and providing a water surface detection means, it is possible to prevent water from entering the air cleaner and the engine. The present invention relates to a vehicle traveling on rough terrain that effectively prevents.

In conventional all-terrain vehicles, an air cleaner is installed near the engine at a relatively low height below the seat, and the air intake port of this air cleaner is also located at a relatively low height. was placed in position. For this reason, when crossing a river, driving near water or puddles, water tends to enter the air cleaner through the air intake port, which may cause engine malfunction or engine damage. In such a situation, the engine had to be disassembled and repaired, which was a very troublesome task.

The present invention was devised in view of the above-mentioned actual situation, and it is difficult for water to enter the air cleaner when driving in shallow water, and even if the engine is placed under conditions where water may enter the air cleaner, To provide an all-terrain vehicle that can reliably prevent water from entering the vehicle and ultimately prevent engine malfunction or engine damage caused by water entry.

The present invention is characterized in that the air intake of the air cleaner is arranged at a high position and faces downward, and a water surface detection sensor is provided at a position slightly below the air intake, and the water surface is detected by the detection means. The reason is that the engine is configured to stop driving based on the following conditions.

An embodiment of an all-terrain vehicle to which the present invention is applied will be described below with reference to the drawings.

In FIGS. 1 to 3, 1 is a saddle-type body, and this body 1 has a front wheel 3 and a rear wheel 4 mounted on a body frame 2 configured as shown in FIG. It consists of two wheels. These wheels 3 and 4 are equipped with tires 5 (so-called balloon tires) that have low internal pressure and a wide contact surface with the ground. Further, a link mechanism 6 as shown in FIG. 3 is used as a steering mechanism for steering the front wheels, and a pipe handle 7 is used as an operating means for this link mechanism 6.

An engine 1 is placed in a space A surrounded by an upper frame 9, a front frame 10, a lower frame 11, and a rear frame 12 of the vehicle body frame 2.
4, a carburetor 15, an air cleaner 16, and other various parts are mounted on the tower. The power from the engine 14 is transmitted to the front wheels 3 and the rear wheels 4 via a power transmission mechanism (not shown). Further, a front cover 18 and a rear cover 19 are attached to the upper part of the vehicle body frame 2, and a seat 20 is arranged on the rear cover 19.

On the other hand, as shown in FIGS. 1 and 4, an air introduction pipe 22 for guiding air to the air cleaner 16 is provided above the space A. That is, one end 22a of the air introduction pipe 22 is connected to the intake port of the air cleaner 16, and the other end 22b is located above the one end 22a, for example above the engine 14. Note that this other end portion 22b is, as clearly shown in FIG.
It is curved into an approximately inverted U shape, and a protrusion 23 for draining water is formed on the periphery of the lower portion. and approximately at the center of the portion surrounded by the protrusion 23, and where the protrusion 23
That is, the other end 22b is the lowermost end 23a.
For example, a circular opening 24 is provided above the opening 24, and a pipe-shaped member 25 is fixed to the opening 24. Thus, the hollow portion 25a of the pipe-like member 25 communicating with the air introduction pipe 22 is connected to the air intake port 2.
7, and its air intake port 27 is arranged downward at a relatively high position.

Further, as shown in FIG. 4, a water surface detection sensor is installed on the inner circumferential surface of the protrusion 23, slightly above the protruding end 23a, and also slightly below the air intake port. 28 is installed. Although not shown in the drawings, when the water surface is detected by the sensor 28, power supply to, for example, the ignition coil of the engine spark plug is forcibly blocked based on the detection signal from the sensor 28, and the engine is driven. is configured to be stopped.

According to the all-terrain vehicle configured in this way, the air intake port 27 of the air introduction pipe 22 functions as the intake port of the air cleaner 16;
Since the air intake port 27 is located at a relatively high position, it has the advantage that water is difficult to enter into the air cleaner 16 through the air introduction pipe 22 when traveling in shallow water, near water, or in puddles.

Furthermore, even if the rough terrain vehicle of this embodiment unexpectedly travels, for example, in a place with deep water,
Engine malfunctions and engine damage caused by water intrusion can be effectively prevented. That is, when the water surface reaches the height indicated by the dashed line B in FIG. 4, for example when crossing a river, the sensor 28 detects the water surface. In conjunction with this, a water surface detection signal is output from the sensor 28, and based on this water surface detection signal, the energization of the ignition coil is forcibly blocked, and the engine 14 is placed in a stopped state.
Therefore, even if water were to enter the air cleaner 16 through the air introduction pipe 22, no water would be drawn into the engine 14. Therefore, water can be prevented from entering the engine 14, and engine malfunctions and engine damage caused by this can be reliably prevented. Therefore, there is no need for disassembly and cleaning to remove water.

Although one embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and various modifications and changes can be made based on the technical idea of the present invention.

For example, it is also possible to provide the air introduction pipe 22 with a closing means, and to operate the above-mentioned closing means based on the water surface detection symbol from the sensor 28 to bring the air introduction pipe 22 into the closed state. With this configuration, it is possible to reliably prevent water from entering the air cleaner 16.

Furthermore, in this embodiment, the present invention is applied to a four-wheeled vehicle for traveling on rough terrain, but it goes without saying that the present invention can also be applied to tricycles, two-wheeled vehicles, etc. for traveling on rough terrain. .

As described above, according to the present invention, since the air intake port of the air cleaner is arranged at a high position, it is difficult for water to enter the air cleaner when crossing a river or the like. Furthermore, a water surface detection sensor is provided at a predetermined position, and the engine drive is stopped based on the detection of the water surface by this detection means.
Even if water were to enter through the above-mentioned air intake port when crossing a river, the engine drive would be automatically stopped immediately before that happens. As a result, water is prevented from entering the engine.
It is possible to completely and reliably prevent engine malfunctions and engine damage caused by water inhalation. Therefore, there is no need to perform troublesome disassembly and repair to remove water from the engine, and a practical off-road vehicle capable of running in shallow water can be obtained.

[Brief explanation of drawings]

The drawings show an embodiment of an off-road vehicle to which the present invention is applied, in which FIG. 1 is a side view of the off-road vehicle, FIG. 2 is a plan view of the same, and FIG. 3 is a plan view of the same. The exploded perspective view and FIG. 4 are enlarged sectional views of the air introduction pipe. 14...Engine, 16...Air cleaner, 2
2... Air introduction pipe, 22a... One end, 22b...
. . . other end, 23 . . . protrusion, 25 . . . pipe-shaped member, 27 .

Claims (1)

[Scope of utility model registration request] The air intake of the air cleaner is arranged at a high position and faces downward, and a sensor for detecting the water surface is provided at a position slightly below the air intake, and the engine drive is stopped based on the detection of the water surface by the sensor. An all-terrain vehicle characterized by being configured as follows.