JPH0318260Y2 - - Google Patents

Description

[Detailed explanation of the idea]

[Subject of the Invention] The present invention relates to an engine cooling device, and particularly to an engine cooling device suitable for an engine cooling device mounted on a cab over truck, which is a large vehicle. [Background of the Idea] A conventional cooling system for an engine of a large vehicle is schematically shown in FIGS. 1 to 3. FIG. 1 is a side view showing a schematic configuration of an engine cooling system housed in a vehicle frame, FIG. 2 is a front view thereof, and FIG. 3 is a plan view thereof. In the figure, 1 is a cab, and a driver's cab 9 is formed on the floor 2 of the cab 1. Below the floor 2 of the cab 1, there is a vehicle frame 3, a cross member 4, etc.
The engine 5, radiator 6, etc. are housed surrounded by. Note that 8 in the figure indicates the axle of the front wheel 7. In recent years, engines have become larger as vehicles become faster and more powerful, and as engines become larger, radiators to ensure sufficient cooling performance also become larger. In cooling an engine having the above structure, even if the radiator becomes larger as the engine becomes larger, the frame 3 has a fixed width l, and the radiator can only be expanded in the vertical direction. However, since the upward direction is limited by the floor 2 of the cab 1, it can only be expanded downward.
However, the cross member 4 is provided below, and the portion of the radiator 6 where the cross member 4 is located and the portion 6 below the cross member 4
A is a portion with poor cooling efficiency because the bumper 11 and cross member 4 obstruct the ventilation of cooling air. Further, as the engine 5 becomes larger, the radiator cannot be extended downward much due to ground clearance. As a result, the protrusion a of the rear end of the engine 5 becomes larger than that of the cab 1, which is inconvenient because the loading platform cannot be enlarged accordingly. This also applies to trailers, and the protrusion of the rear end of the engine from the cab 1 is restricted, making it difficult to increase the size of the engine and radiator. A water-cooled engine cooling system that the applicant previously applied for as a technology to improve the cooling performance of the engine cooling system.

[Jitsugan No. 56-44397 (Jikko 57-
157718)]. This basic structure has a plurality of cooling radiators connected to the engine body via engine cooling water passages. Although it is possible to improve the cooling performance by adopting such a structure, since there is no regulation as to how to arrange the plurality of radiators, it is possible to prevent the engine 5 from protruding from the cab 1.
The disadvantages of the above points and the reduced cooling efficiency of the radiator 6 in the portion where the cross member 4 is located have not been resolved. [Purpose of the invention] The present invention was made in view of the above points, and is an engine that improves the cooling performance of the radiator, does not protrude beyond the cab at the rear end of the engine, and improves the fuel efficiency of the engine. The purpose is to provide a cooling device. [Summary of the invention] The main point of the invention is to arrange a plurality of radiators with engine-driven fans on the top of the cross member at the frontmost end of the vehicle frame located at the bottom of the cab, and to replace the radiator with the engine-driven fan of the cab-over type vehicle. The main points are that the radiator does not obstruct the ventilation of cooling air from the radiator, and by locating the radiator above the cross member, the protrusion of the rear end of the engine from the cab is reduced or eliminated. [Embodiments of the invention] Examples of the invention will be described below based on the drawings. 4 to 6 are diagrams showing the schematic structure of the engine cooling device according to the present invention, FIG. 4 is a side view of the schematic structure of the engine cooling device, FIG. 5 is a front view, and FIG. FIG. In the drawings, parts given the same reference numerals as in FIGS. 1 to 3 indicate the same or equivalent parts. As shown in the figure, two radiators 21 and 22 are arranged above the cross member 4 at the front end of the vehicle frame 3. This radiator 2
1 and 22 are provided with fans 23 and 24, and rotary shafts 25 and 26 of the fans 23 and 24 are provided with pulleys 27 and 28 for transmitting driving force. On the other hand, on the crankshaft 29 of the engine 5,
A pulley 30 that provides driving force to the pulleys 26 and 27 is provided, and the pulleys 27 and 3
Belts 31 and 32 made of V-belts or the like are stretched between the pulleys 28 and 30. In the above configuration, the rotating shafts 25, 26
, the fans 23 and 24 are rotated, and cooling air is drawn into the radiators 21 and 22. At this time, since the radiators 21 and 22 are provided above the cross member 4, the cross member 4 does not obstruct the ventilation of the cooling air, so that the cooling efficiency of the radiators 21 and 22 is improved. In addition, as mentioned above, the radiators 21 and 22
By placing the engine 5 at the top of the cross member 4, the engine 5 can be placed further forward than the conventional one shown in FIG. a
can be reduced to 0 or at least smaller than before. FIG. 7 is a front view showing a schematic configuration of an engine cooling device according to another embodiment of the present invention. In the figure, a rectangular radiator 41 that is long in the left and right direction is arranged at the top of the cross member 4.
Inside this radiator 41 are two fans 42, 4.
3 is provided. The fans 42 and 43 are pulleys 30 provided on the crankshaft 29 of the engine 5.
Therefore, the belts 31 and 32 are rotated at the same time. With this configuration, as in the case of the above embodiment, the cross member 4 does not impede the ventilation of cooling air to the radiator 41, improving the cooling performance of the radiator, and also improving the cooling performance of the radiator 41. The amount that protrudes from the cab 1 is either eliminated or becomes smaller than before. As described above, according to the above embodiment, a plurality of radiators having engine-driven fans are connected to the cross member 4.
The cooling performance of the radiator is improved because the cooling air is not obstructed by the cross member 4, and the radiator with multiple engine-driven fans is installed on the top of the cross member 4. and fuel efficiency. Also, since the radiators 21, 22 or 41 are placed above the cross member 4, the front end of the engine 5 can be placed further forward, which prevents the rear end of the engine 5 from protruding beyond the cab 1. Alternatively, it can be made smaller than the conventional one. Furthermore, by using a plurality of radiators or a plurality of radiator fans, the diameter of the fans can be reduced, and noise can also be reduced. [Effects of the invention] As explained above, in the engine cooling system according to the invention, the radiator having the engine drive fan is arranged above the cross member at the frontmost end of the vehicle frame, so that the ventilation of cooling air is improved. The cooling performance of the radiator is improved without being obstructed by the cross member, and fuel efficiency is also improved accordingly. Furthermore, since the radiator can be placed above the cross member, the rear end of the engine can be prevented from protruding beyond the cab, or can be made smaller than before, which has the excellent effect of increasing the cargo platform.

[Brief explanation of drawings]

FIG. 1 is a side view showing a schematic configuration of a conventional engine cooling device, FIG. 2 is a front view thereof, and FIG. 3 is a plan view thereof. FIG. 4 is a side view showing a schematic configuration of an engine cooling device which is an embodiment of the present invention;
Figure 5 is its front view, Figure 6 is its plan view, and Figure 7 is its front view.
The figure is a front view showing a schematic configuration of an engine cooling device according to another embodiment of the present invention. In the figure, 1 is the cab, 2 is the floor, 3 is the vehicle frame, 4 is the cross member, 5 is the engine, 6 is the radiator, 7 is the front wheel, 8 is the axle, 9 is the driver's cab, 1
1 is the bumper, 21, 22, 41 are the radiators,
23, 24, 42, 43 are fans, 25, 26 are rotating shafts of the fans, 27, 28 are pulleys, 29 is a crankshaft, 30 is a pulley, and 31, 32 are belts.

Claims (1)

[Claims for Utility Model Registration] An engine cooling device for cooling an engine disposed in a position surrounded by a vehicle frame located below the cab of a cab-over type vehicle and a cross member at the frontmost end of the frame, comprising: A plurality of radiators are arranged on the upper part of the member, and a number of radiator cooling fans corresponding to the number of radiators are provided, and the plurality of radiator cooling fans are connected to the engine crankshaft via a belt. Characteristic engine cooling system.