JPH0248671Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to a so-called cab-over type automobile in which a water-cooled engine is disposed at the rear of a floor panel constituting the floor of the cabin, and a radiator for the engine is disposed at the front. The invention relates to a cooling device for the engine.

[Conventional technology]

In a so-called cab-over type automobile in which a water-cooled engine is disposed at the rear of the floor panel constituting the cabin floor and a radiator for the engine is disposed at the front, the cooling water outlet of the engine is connected to the upper tank of the radiator. The cooling water outlet piping and the cooling water supply piping that connects the engine's cooling water inlet and the radiator's lower tank were generally placed on the bottom of the floor panel due to space constraints. Since the outlet and the upper tank of the radiator are located higher than the floor panel, installing the cooling water outlet pipe that connects them on the bottom of the floor panel means that the middle part of the cooling water outlet pipe is The engine's cooling water outlet and the radiator's upper tank are curved so that they are lower than the tank, and when supplying cooling water from the filler neck in the radiator's upper tank, air in the jacket of the engine must be removed from the upper tank to cool the engine. Water will not flow into the jacket in the engine. In other words, when supplying cooling water, the air in the jacket of the engine must be removed each time, which makes it difficult to supply cooling water easily. There were problems such as blocking the circulating flow of cooling water for accumulated air and causing hot water to spout out when the radiator filler cap was opened.

Therefore, as prior art, Japanese Utility Model Publication No. 51-6594 and Japanese Utility Model Application Publication No. 52-108455 connect the engine cooling water outlet and the radiator's upper tank with an air vent hose located above these. By doing so, the air in the jacket of the engine is vented through the air vent hose.

[Problem that the invention attempts to solve]

However, connecting the engine located behind the floor panel and the radiator located in front of the floor panel through an air vent hose complicates the structure and increases manufacturing costs. This results in an increase in lift and weight, and there are also problems such as the need to secure space for installing the air vent hose inside the car.

The present invention solves the above problem by allowing the air in the jacket of the engine to escape through the cooling water outlet pipe.

[Means to solve the problem]

For this reason, the present invention provides a water-cooled engine at the rear of a floor panel constituting the cabin floor, a radiator for the engine at the front, and a cooling water outlet that connects the engine's cooling water outlet and the upper tank of the radiator. In an automobile in which an outlet pipe and a cooling water supply pipe connecting a cooling water inlet of the engine and a lower tank of a radiator are arranged on the lower surface of the floor panel, the cooling water outlet of the engine is arranged at approximately the same height as the floor panel. At the same time, a cooling water outlet pipe connecting the cooling water outlet and the upper tank is installed in a floor tunnel formed in the floor panel.

[Functions and effects of the idea]

In this case, the floor tunnel in the floor panel is formed by recessing the floor panel upward, and is located above the bottom surface of the floor panel, so as mentioned above, the cooling water outlet in the engine is placed at approximately the same height as the floor panel. By installing the cooling water outlet piping connecting between the cooling water outlet and the upper tank in the floor tunnel,
The cooling water outlet piping can be constructed in an inclined manner so that the height thereof gradually increases from the outlet of the engine to the upper tank of the radiator.

In other words, it is possible to avoid creating a part in the middle of the cooling water outlet piping that is lower than the engine outlet as in the prior art, so that the air that collects at the engine outlet can be transferred to the radiator through the cooling water outlet piping. It can be drained into the Atsupa tank.

Therefore, according to the present invention, in order to bleed air from the engine outlet into the upper tank of the radiator, the air vent hose of the prior art, which was provided between the outlet and the upper tank, can be eliminated, and the cooling hose connecting the outlet and the upper tank can be eliminated. Since the water outlet piping can be used both for circulating cooling water and for air venting, it is possible to prevent the problems of the prior art from complicating the structure, increasing weight and manufacturing costs, and also making it possible to install an air venting hose inside the vehicle. This has the effect of avoiding the problem of having to secure space for

〔Example〕

Hereinafter, an embodiment of the present invention will be explained with reference to the drawings. In the drawings, reference numeral 1 indicates a pair of left and right hollow side frames extending in the longitudinal direction of the automobile. Both side frames 1, 1 are both made of sheet metal, and there is a The front cross frame 2 and the rear cross frame 3 are integrally connected to each other, and a front bumper 4 is attached to the front ends of both side frames 1, 1.

On the front upper surface of both side frames 1, 1,
A floor panel 8 constituting the floor of the cabin 5 that surrounds the driver seat 6 and the passenger seat 7 is attached. A tunnel 9 is formed.

Reference numeral 10 in the figure indicates a water-cooled engine located at the rear of the floor panel 8, and the engine 1
0 has a transmission transmission transmission 11 attached to its rear surface, and a rear cross frame 3 that connects both side frames 1, 1, and an engine support frame 12 mounted between both side frames 1, 1. The cooling water outlet 13 of the engine 10 is located at the same height as the floor panel 8 or at a similar height to the rear surface of the engine 10. It is provided.

Reference numeral 14 in the figure indicates a radiator with a fan (not shown) located at the front lower part of the floor panel 8, and the upper tank 15 of the radiator 14 is located at a higher position than the cooling water outlet 13 of the engine 10. Further, the lower tank 16 has an approach line 18 connecting the lower surface of the front bumper 4 and the outer peripheral surface of the front wheel 17.
It is installed at a height that is located higher up,
The cooling air after passing through this radiator 14 is
It is designed to blow through rearward from the lower surface of the floor panel 8 and the inside of the floor tunnel 9.
Note that a filler neck (not shown) with a filler cap is provided on the upper surface of the upper tank 15.

A cooling water supply pipe 23 is provided on the lower surface side of the floor panel 8 between the lower tank 16 of the radiator 14 and the cooling water inlet 22 to the cooling water pump 21 attached to the front surface of the engine 10. A cooling water outlet pipe 24 connecting the upper tank 15 of the radiator 14 and the outlet 13 of the engine 10 is disposed within the floor tunnel 9 of the floor panel 8.

In this way, the cooling water outlet 13 in the engine 10 is provided at the same height as the floor panel 8 or at a similar height, that is, at approximately the same height as the floor panel 8. By disposing the cooling water outlet piping 24 for connecting to the upper tank 15 in the outlet 14 in the floor tunnel 9 in the floor panel 8, the cooling water outlet piping 24 connects to the upper tank 15 from the outlet 13 as shown in FIG. The cooling water outlet 13 of the engine 10
The air collected in
It can be pulled out inside.

In this case, the cooling water outlet piping 24 includes two metal pipe parts 24a and 24b connected to each other by a rubber pipe 24c, and a rubber pipe for connecting one metal pipe part 24a to the cooling water outlet 13. The metal tube portion 24a is composed of a portion 24d and a rubber tube portion 24e for connecting the other metal tube portion 24b to the upper tank.
However, the other metal tube portion 24b is disposed within the left side frame 1 and within the floor tunnel 9, respectively. In addition, the cooling water supply pipe 23 has 1
It is composed of a metal tube section 23a and rubber tube sections 23b and 23c for connecting the metal tube section 23a to the cooling water inlet 22 and the lower tank 16.

The highest part of the cooling water jacket in the engine 10 is connected to the outlet 13 via a thin air vent pipe 26 equipped with a valve 25, as shown in FIG.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view of the automobile, Fig. 2 is a partially cutaway perspective view with the cabin removed, Fig. 3 is a side view with the cabin removed, and Fig. 4 is a side view of the automobile. The figure is a plan view of FIG. 3, and FIG. 5 is an enlarged sectional view taken along the line V-V of FIG. 4. 1... Side frame, 2, 3... Cross frame, 4... Front bumper, 5... Cabin, 6... Driver seat, 7... Passenger seat, 8... Floor panel, 9... Floor tunnel, 10...
...Engine, 13...Cooling water outlet, 14
...Radiator, 15...Atsupa tank, 16
...Lower tank, 21 ...Cooling water pump, 22
...Cooling water inlet, 23...Cooling water supply piping, 24...Cooling water outlet piping.

Claims (1)

[Scope of utility model registration request] A water-cooled engine is installed at the rear of the floor panel that constitutes the floor of the cabin, and a radiator for the engine is installed at the front. Cooling water outlet piping connects the engine's cooling water outlet and the upper tank of the radiator, and engine cooling is provided. In an automobile in which a cooling water supply pipe connecting a water inlet and a lower tank of a radiator is arranged on the lower surface of the floor panel, the cooling water outlet of the engine is installed at approximately the same height as the floor panel; A cooling device for an automobile engine, characterized in that a cooling water outlet pipe connecting the cooling water outlet and the upper tank is installed in a floor tunnel formed in the floor panel.