JPS5960020A - Engine cooling device - Google Patents

Abstract

PURPOSE:To decrease the driving time of a cooling fan motor by opening an opening hole, communicated to the open air, provided in an engine chamber which contains an engine cooling system by means of a negative pressure or an electrical driving force. CONSTITUTION:A cooling system of an engine 10 is composed of a main cooling circuit 11, a radiator 12, a by-pass circuit 13, a thermostat valve 14 and a cooling fan motor 15. An opening hole 19 is provided in an engine chamber 16 which contains said cooling system. The opening hole 19 is controlled in its opening and closing with a negative pressure control valve 20 which is controlled with a control device 21 to which a detected value of a cooling water temperature sensor is inputted. While the cooling water temperature is rising, said opening hole is opened before the driving of the cooling fan motor 15.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an engine cooling system, and more particularly to an engine cooling system installed in a water-cooled internal combustion engine for automobiles.

The cooling system of a conventional internal engine generally includes a radiator that radiates heat from the cooling water, an on-off valve that bypass-controls the cooling water passing through the radiator depending on the temperature, and a cooling fan that forcibly cools the radiator. It has a configuration comprising: The cooling water temperature rises from the low temperature state and the first
When the set temperature is reached, the on-off valve opens and the cooling water passes through the radiator.When the temperature of the cooling water rises further and reaches the second set humidity, the fan rotates and forcibly cools the radiator. start. In this way, when the cooling water wetness is higher than the second set temperature, the temperature is always turned on.

Therefore, the rotation operating time of the fan becomes longer than the engine operating time, resulting in a decrease in battery capacity and a disadvantage such as a decrease in actual engine output.

The purpose of the invention is to shorten the rotation operating time of the fan.

In order to achieve the above object, the present invention provides an opening hole in the bonnet, communicates the inside of the engine room with the outside air through the opening hole, and the opening hole allows the air to flow through the negative air or G:r generated by the engine. ! The basic structure is to control opening and closing using mechanical force. With this configuration, when the temperature of the cooling water rises, the on-off valve opens and the cooling water passes through the radiator. A control device that detects, amplifies, and operates electrically operates the cooling water temperature, which uses the negative pressure generated by the engine or the power of the dust to open an opening that connects the outside air with the inside air of the engine room. The fan is opened to release the heat generated by the engine to the outside.Furthermore, only when the coolant wetness rises, the fan rotates to forcibly cool the radiator to achieve the desired purpose. Therefore, since the rotation time of the fan is reduced, the efficiency of engine output is significantly improved, the life of the battery is extended, and the noise can be reduced. By reducing the fan rotation time, it is possible to shorten the fan operating time rating and reduce the fan shape at the same time, improving overall reliability and cooling performance in the engine cooling system. It is important to first release the hot air in the engine room, which normally stays in the upper part of the engine room, to the outside, but in the configuration of the present invention, since the bonnet is provided with an opening hole, Hot air in the engine room can be effectively released to the outside.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In Figure 1, the heat of the cooling water circulating through the main cooling circuit 11 of the internal combustion engine 10 is released by the radiator 12, and the on-off valve 14 disposed in the main cooling circuit 11 adjusts the temperature of the cooling water. The valve opens and closes in response, and when the valve 14 is closed, the cooling water circulates through the bypass circuit 18 and is supplied to the radiator 12. When the valve 14 is opened, the cooling water passes through the radiator 12. become. The radiator 12 is forcibly cooled by air by a cooling motor 7 and 15.

The configuration is as follows.

Now, in the bonnet 16 of the J01 Ho, there is an engine compartment 1.
An opening hole 19 is provided which communicates the outside air 18 with the outside air 18. The control pr+ and the negative pressure control valve 20 operate upon receiving an electrical signal from a control device f121 that detects and amplifies the cooling water temperature and operates electrically.

Next, the operation of the above configuration will be explained. When the humidity of the cooling water rises from a low temperature state and reaches the first set humidity T1, the on-off valve 14 opens and the cooling water flows into the radiator 12.
pass through. As the cooling water wetness continues to rise, the second set wetness T2
When (Tz>Tt) is reached, the set temperature T2 is detected and an electric signal is sent from the control device 21 to the negative pressure control valve 20 rl,
The opening hole 19 is opened by the operation of the negative pressure control valve 20, and the internal heat of the engine room 17 is released to the outside. At this time,
The negative pressure control valve 201 fully opens the opening hole 19 using negative pressure generated from the engine. Furthermore, when the cooling water temperature rises and reaches the eighth set wetness Ts (Tt > Tl), the fan 15 starts operating and the radiator 12 is forcibly air-cooled.

Embodiment G mentioned above utilizes the negative pressure generated by the engine. The configuration for opening and closing the opening hole 19 is shown in pn. FIG. 2 shows a second embodiment of the present invention (4), in which an electric force generated by an engine is used to open and close the opening hole. That is, as shown in FIG.
An electromagnetic solenoid 22 is installed in place of the negative pressure control valve 20. The solenoid 22 receives an electric signal from the control device 21 and uses electric force generated from the engine to open and close the opening hole 19.

In addition, in Figure 2 of Taki, the same components as @1 are indicated by the same symbols.

[Brief explanation of drawings]

1 is a system diagram showing a first embodiment of an engine cooling device according to the present invention, and FIG. 2 is a system diagram showing a second embodiment of the present invention. 10...Engine, 12...Radiator, ■4...
・Opening/closing valve, 15...7 closing, 16...bonnet,
17...Engine room, 18...Outside air, 19...
・Opening hole, 20... Negative pressure control valve, 22... Electromagnetic solenoid

Claims (1)

[Claims] An engine equipped with a radiator that radiates the heat of the cooling water circulating in the cooling system of an inner cable engine, an on-off valve that bypass-controls the cooling water passing through the radiator depending on the temperature, and a cooling fan that forcibly air-cools the radiator. The inside air of the engine room that houses the cooling system is communicated with the outside air through an opening provided in the bonnet, and the opening and closing of the opening is controlled by negative pressure or mechanical force generated from the engine. Engine cooling system.