JPS60153418A - Cooler for lean-type motortricycle - Google Patents

Abstract

PURPOSE:To improve the cooling effect by connecting the air intake pipe of an engine to at least a part of a radiator at the air outflow side thereof, said part being the portion which is influenced by the air intake effect toward the air inflow side. CONSTITUTION:An air intake pipe 14a connected to a carburetor etc. is connected via an air cleaner 13 to the residual part 7a of a radiator 7 which is mainly ventilated by a cooling fan 11. And the intake air of an engine is applied as the supplementary power for the cooling fan 11. The cooling effect can be thereby improved.

Description

[Detailed description of the invention] The present invention relates to a cooling device for a lean type three-wheeled motor vehicle.

For example, as shown in Fig. 81, a lean type three-wheeled motor vehicle connects a front frame 1 and a rear frame 2 so as to be swingable by a roll shaft 3 extending in the front-rear direction, and has one wheel 4 all supported on the front frame 1. At the same time, the two rear wheels 5 are pivotally supported on the rear seven frames 2, so that even a three-wheeled vehicle can run stably with the center of gravity shifting when traveling around a curve.

Conventionally, in such a single-type three-wheeled motor vehicle, the water-cooled engine 6 is mounted on the rear frame to improve the stability of the vehicle body, and the cooling water of the water-cooled engine 6 is air-cooled to improve the ventilation of the vehicle. It has been considered to provide the radiator 7 at the frontmost part of the vehicle width, or to arrange it at the rear part of the vehicle width.

If the radiator 7 is installed at the rear of the vehicle, the radiator 7
As shown in Figure 2, the ventilation to the engine
Conventionally, the back side of the radiator 7 is completely opened, and most of the air used for cooling is released into the atmosphere. Therefore, there is a certain limit to the amount of air that can actually pass through due to the ventilation resistance of the radiator 7, and the cooling effect may not necessarily be sufficient at low speeds such as when idling or in traffic jams. As a countermeasure, install a wind guide duct
Possible options include expanding the size of the cooling fan and increasing the size of the cooling fan [1], but the former would lead to an unnecessary expansion of space in the engine room, which would be inconvenient for shrewd scientists, such as increasing costs.

This invention was made in consideration of all such circumstances.
The intake pipe of the engine is connected to at least a part of the air outflow side of the radiator and the part where the intake action reaches the air inflow side, forming a part that forcibly ventilates the inside of the radiator by the intake action of the engine for cooling. All efforts to improve effectiveness,
Furthermore, the present invention provides a cooling system for a lean three-wheeled motor vehicle, which can reduce the space of the engine room by reducing the air guide duct and reduce the cost by downsizing the cooling fan.

Hereinafter, one embodiment of the present invention will be described with reference to FIG. The structure of the vehicle body and the attachment of the engine and radiator to the vehicle body are the same as before, so please refer to FIGS. 1 and 2 for common parts. That is, the cooling device is a radiator 7 that air-cools the engine cooling water of the water-cooled engine 6, and is placed at the rear of the gold engine cover 8. It is attached to the rear frame 2 of a lean-type three-wheeled motor vehicle that is rotatably coupled.

In the cooling device of this embodiment shown in FIG.
The rear side (right side in the figure) is the air inflow side. The front side (left side in the figure) of this radiator 7 is an air outflow side, and a forced suction duct 12i is connected to the central part of this outflow side. This duct 12 is connected via an air cleaner 13 to a capretor 14 of the engine by an intake pipe 14a. The suction action based on the negative pressure in the capretor 14 is applied to the air inflow side of the radiator 7.

The configuration of the air inflow and outflow side of the radiator 7 is outlined in the figure, and it is of course possible to apply the air guide duct configuration shown in Figure 2 to introduce air from the side of the engine cummer. .

In this way, according to the configuration of the embodiment in which the casulet 14, which is the intake pipe portion of the engine, is connected to the air outflow side of the radiator 7 and the part where the intake action reaches the air inflow side, the airflow based on the intake action of the engine is achieved. is ensured in the radiator 7. For example, in the case of a 1200 cc, 4-stroke engine with a maximum speed of 6000 rpm and a throttle opening (intake efficiency) of 90%, the eta ventilation amount can be reliably obtained. Also, with the same type engine, 4000 when pitched
rpm, slot capacity is obtained. In the conventional device described above, an apparent amount of air of about 25 OA'/see is supplied to the inlet side of the radiator, but the actual amount of air passing through may be less than the calculated value based on this embodiment.
This embodiment ensures minimum ventilation.

Therefore, a sufficient air-cooling effect of the engine cooling water can be obtained even when the vehicle is idling or in traffic jams.

As a result, the air guide duct can be made smaller, making it possible to make the engine room more compact, and the cooling fan can be made smaller, resulting in lower costs. Ru.

In addition, as an incidental effect, the higher intake air temperature improves fuel atomization and improves combustion conditions.
Advantages include preventing icing and enabling good running with a lean air-fuel ratio even at low temperatures.

In the above embodiment, the central part of the air outflow side of the radiator 7 is connected to the intake pipe of the engine over a relatively wide range, but the present invention is not limited to such a connection.
As shown in the figure, an intake pipe 14ai to a capretor, etc. is connected to the remaining portion 7m of the radiator 7 where main ventilation has been performed by the cooling fan 11 via an air cleaner 13, and the intake air of the engine is connected to the intake pipe 14ai to a carburetor etc. to assist the cooling fan 11. You may also use . In this manner, the above-mentioned effects such as miniaturization of the cooling fan [1] can be sufficiently achieved by simply implementing this method on at least a portion of the air outflow side of the radiator.

As detailed above, the lean type automatic 3 according to the present invention
According to a cooling system for a wheeled vehicle, even if the radiator is installed at the rear of the engine cover of the rear frame in consideration of vehicle stability, at least part of the air outflow side of the radiator and the air inflow side of the radiator are By connecting the engine's intake pipe to the area where the intake action is applied, radiator ventilation based on the engine's intake action can be forcibly and reliably carried out, improving the cooling effect and reducing the size of the engine room by reducing the air guide duct. It has structural effects such as cost reduction due to the compact design and compact size of the cooling fan, and operational effects such as reflexively improving combustion conditions by increasing the intake air temperature in the engine with the radiator. Aoi is done.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a Hirichi type three-wheeled motor vehicle, Fig. 2 is a plan view showing a partially enlarged engine cover thereof, and Fig. 3 is a schematic diagram showing an embodiment of the cooling device according to the present invention. The plan view and FIG. 4 are partially enlarged plan views showing another embodiment. 1... Front frame, 2... Rear frame, 6... Water-cooled engine, 7... Radiator, [2... Duct,
14...Carburetor,]4a...Intake pipe. Applicant's agent Hisada Hatano l Figure 2 Figure 3 Figure 4 Figure 4

Claims (1)

[Claims] In a cooling system for a one-type three-wheeled motor vehicle that is equipped with a radiator that air-cools the engine cooling water of a water-cooled engine, at least a portion of the air outflow side of the radiator has an air intake action to the air inflow side, and A cooling device for a three-wheeled motor vehicle characterized by a connected intake pipe.