JPH10274036A - Engine cooling device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a frequency of rotation of an air blower so as to reduce noise by setting a temperature setting value of cooling water for controlling rotation of the air blower by operation of crew, in a device formed in such a constitution that the rotation of the air blower for cooling cooling water is ON/OFF controlled according to the temperature of cooling water in an internal combustion engine. SOLUTION: In a diesel engine 1 of a diesel vehicle for a rail way, cooling water 9 goes out from a cooling water outlet 10 of the diesel engine 1, and is cooled by a radiator 12 passing a cooling water piping 11. The cooling water 9 is returned into a cooling water inlet 14 of the diesel engine 1 passing a cooling water piping 13. A temperature sensor 15 is arranged on the cooling water outlet 10, and rotation of the air blower 6 is turned on/off from a cooling water temperature information 16 to be obtained by an air blower turning on/off command means 17 through an oil filling/draining type fluid coupling 20 in association with an air blower turning on/off temperature setting value 18. The air blower turning on/off command means 17 is set by a driver or a point information 22 so as to change the air blower turning on/off temperature setting value 18 by inputting a command 23 for changing the air blower turning on/off temperature setting value 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling system for an internal combustion engine of a vehicle.

[0002]

2. Description of the Related Art Cooling water (hereinafter referred to as "cooling water") of an internal combustion engine (hereinafter referred to as "cooling water") of a railway diesel vehicle is cooled by a cooling water cooling blower (hereinafter referred to as "blower"). )) And the cooling air generated by rotating
This is performed by cooling a radiator through which cooling water flows. As for the ON / OFF control of the rotation of the blower, there is a method in which the engine directly rotates the blower by a method of charging and discharging a fluid coupling of a charging and discharging type, and a method in which the motor rotates the blower. Is ON / OF of energization
There is a method by F control and the like. A temperature sensor is provided at the cooling water outlet, and ON / OFF of the rotation of the blower is performed based on the temperature information. The rotation of the blower turns on when the cooling water reaches a certain temperature or higher, for example, 80 ° C. or higher, and cools the cooling water. When the temperature of the cooling water drops and falls below a certain temperature, for example, below 70 ° C., the rotation of the blower becomes O
It becomes FF and prevents overcooling of the engine. The temperature set value at which the rotation of these blowers is turned ON / OFF is the same whether the diesel vehicle is running and the load on the engine is large, for example, even if the load is small while the station is stopped,
It could not be changed.

[0003]

It is said that a diesel vehicle generally has higher noise outside the vehicle than an electric vehicle. In particular, when the train is stopped, the distance between the engine and the blower, which are noise sources, and the passengers on the platform is short. Therefore, even if the engine is idle, noise often becomes a problem. In order to solve this problem, the rotation of the engine and the rotation of the blower may be stopped when the train stops. However, the power of the engine is used not only for driving the vehicle through the wheels, but also for supplementing a blower, a charging generator for obtaining control power, and an air compressor for obtaining braking force. It is also used for driving machines. Therefore, even if the vehicle is stopped, the engine cannot be stopped. on the other hand,
The power for driving the auxiliary equipment may be significantly smaller than the power for driving the vehicle. Many diesel vehicles are
Even when the engine is in an idle state, it is possible to sufficiently generate power for driving auxiliary equipment. Therefore, when the diesel vehicle is stopped, the load on the engine is small, so the amount of heat to be dissipated may be small. Even if the rotation of the blower is turned off, the cooling water temperature cannot normally rise rapidly. When the outside air temperature is low, the cooling water temperature may decrease due to natural cooling of the engine body and the radiator.
According to the present invention, when noise outside the vehicle poses a problem, such as when stopping at a station, the temperature setting value at which the rotation of the blower is turned ON / OFF is changed based on the judgment of the crew or the point information, so that The object is to reduce noise by reducing the rotation frequency as much as possible.

[0004]

The invention according to claim 1 is an apparatus for cooling an internal combustion engine of a vehicle having a function of controlling ON / OFF of the rotation of a cooling water cooling blower according to the temperature of the cooling water of the internal combustion engine. , Turning the rotation of the blower ON / O
The engine cooling device for a vehicle is provided with a means capable of setting the temperature set value of the cooling water to be subjected to FF control by a crew member.

According to a second aspect of the present invention, there is provided an engine cooling system for a vehicle having a function of turning on and off the rotation of a cooling water cooling fan according to the temperature of the cooling water of the internal combustion engine. Alternatively, a means for detecting a state in which a vehicle is present in the section and a control means for changing the temperature setting value of the cooling water at which the rotation of the blower is turned ON / OFF based on the state and reducing the frequency of rotation of the blower are provided. The engine cooling device is provided.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a configuration of an engine cooling device for a railway diesel vehicle according to an embodiment of the present invention. During power running, most of the power of the diesel engine 1 is transmitted to the driving wheels 3 via a power transmission device such as the propulsion shaft 2. Part of the motive power is transmitted to the auxiliary equipment such as the blower 6, the charging generator 7, the air compressor 8, and the like via the auxiliary equipment drive shaft 4, the belt 5, and the like. The cooling water 9 exits from a cooling water outlet 10 of the diesel engine 1 and is provided with a cooling water pipe (outward path) 1.
1 and cooled by the radiator 12 and the cooling water pipe (return path)
13 and returns to the cooling water inlet 14 of the diesel engine 1. A cooling water outlet 10 is provided with a temperature sensor 15, and cooling water temperature information 16 is input to a blower on / off command unit 17. The blower on / off command means 17 outputs a charge / discharge command to the refill / discharge type fluid coupling 20 as a blower on / off command 19 in accordance with the blower on / off temperature set value 18. If the refillable / discharge type fluid coupling 20 is not filled, the blower 6 does not rotate. When the refillable fluid coupling 20 is filled, the blower 6 rotates and the radiator 1 is cooled by the cooling air 21.
The cooling water flowing through the inside 2 is cooled.

FIG. 2 shows an example of the logic in the blower on / off command means 17. The blower on / off command means 17 is composed of, for example, a microcomputer or the like, and includes a CPU, a RO, and the like.
M, RAM and the like. It starts in step S1. In step S2, it is determined whether the cooling water temperature is equal to or higher than 80 ° C. If the cooling water temperature is equal to or higher than 80 ° C. in step S2, the rotation of the blower is turned on in step S5. If the cooling water temperature is not 80 ° C. or more in step S2, step S3
It is determined whether or not the cooling water temperature is lower than 70 ° C. If the cooling water temperature is lower than 70 ° C. in step S3, step S
At 6, the blower is turned off. In step S3, the cooling water temperature
If it is not lower than 70 ° C., it is determined in step S4 whether or not the rotation of the blower is turned on. If the blower is not turned on in step S4, the blower is turned off in step S6. Step S4
If the blower is turned on, the blower is turned on in step S5.

FIG. 3 shows that the load of the engine of the diesel vehicle is classified into “large”, “medium”, and “small”. , And after stopping for a while,
4 shows an example of a temporal change of a cooling water temperature. From FIG. 3 (a)
(b) shows a state in which the diesel vehicle is running with the engine load “medium” when the blower is turned off, and the cooling water temperature is rising. In (b), when the cooling water temperature rises to 80 ° C. or higher, the blower rotates, and after a short time delay, the cooling water temperature starts to decrease. In (c), when the cooling water temperature becomes lower than 70 ° C., the rotation of the blower is turned off. With a slight time delay, the coolant temperature starts to rise. If the load on the engine increases during the rising of the cooling water temperature (d), the cooling water temperature increases with a slight time delay. In (e), when the cooling water temperature becomes 80 ° C or more, the blower rotates. Since the load of the engine is "large" even when the blower rotates, the degree of decrease in the cooling water temperature is small. Even if the vehicle stops at (f) in this state and the load on the engine is low, the cooling water temperature will be lower than 70 ° C.
Until (g), the blower is still rotating. In (h), the diesel vehicle runs again with the engine load "large", and in (i), the blower is turned off until the cooling water temperature becomes 80 ° C or higher.

In addition to the above-mentioned means for turning on and off the known cooling water cooling blower, an engine cooling device for a diesel vehicle to which the present invention is applied will be described again with reference to FIG. The blower on / off temperature set value change command 23 is input to the blower on / off command means 17 based on the driver or the point information 22. When the command 23 is input, the blower on / off temperature set value 18 is set higher. Blower on / off command means 1
7 is a blower on / off command 19 according to the set value 18.
And outputs a command for oil replenishment or oil replenishment to the fluid replenishment type fluid coupling 20.

FIG. 4 shows an example of the logic of the blower on / off command means 17 when the present invention is applied. Step S101
Start with In step S102, it is determined whether or not the crew member has changed the blower on / off temperature set value. Step S
If the set value is changed in step 102, A = 85 ° C. in step S106 and B = 75 ° C. in step S107. If the set value is not changed in step S102, step S1
At 03, it is determined whether or not the blower on / off temperature set value is changed based on the point information. If the set value is changed in step S103, A = 85 ° C. in step S106, step S107
And B = 75 ° C. If the set value is not changed in step S103, A = 80 ° C. in step S104,
At 105, B is set to 70 ° C. After the values of A and B have been determined in steps S102 to S107, step S
At 108, it is determined whether or not the cooling water temperature is equal to or higher than A. If the cooling water temperature is equal to or higher than A in step S108,
In step S112, the blower is turned on, and if the cooling water temperature is not higher than A, it is determined in step S109 whether the temperature is lower than B. If the cooling water temperature is lower than B in step S109, the rotation of the blower is turned off in step S113. If the cooling water temperature is not lower than B in step S109, it is determined in step S110 whether the blower on / off temperature set value is changed. If the set value is changed in step S110, the blower is turned off in step S113. If the set value is not changed in step S110, it is determined in step S111 whether or not the rotation of the blower is turned on. If the fan is not turned on in step S111, the fan is turned off in step S113. If the fan is turned on in step S111, the fan is turned on in step S112.

FIG. 5 shows an example of the temporal change of the cooling water temperature when the present invention is applied under the same situation as in FIG. This shows a case where the set value of the blower on / off temperature is changed according to the crew member or the point information during the period (f) to (g) at the stop of the station. Therefore, the temporal change of the cooling water temperature until the station stops (f) is the same as in the case of FIG. Station stop (f)
At the same time, since the blower on / off temperature set value has been changed, the blower on / off temperature set value has been changed from 80 ° C to 85 ° C.
If the cooling water temperature in (f) is 85 ° C. or less, the rotation of the blower is turned off. However, when the station is stopped, the load on the engine is very small, so the cooling water temperature does not rise rapidly, and when the outside air temperature is low, it may rather fall due to the natural cooling of the engine body and the radiator. . However,
If the cooling water temperature is 85 ° C. or higher, the rotation of the blower is turned on, and it is natural to prevent overheating. In (g), the diesel vehicle runs again with the engine load `` Large '', and if the blower on / off temperature set value returns to normal due to crew operation or point information, if the cooling water temperature is 80 ° C or higher at that time, If the air blower turns on.

As described above, when the load on the engine is small, such as when stopping at a station, the rotational frequency of the blower is increased by increasing the ON / OFF temperature set value of the blower according to the driver's operation or the point information to prevent noise. Is a feature of the present invention.

Although the present embodiment has been described with respect to a railway diesel vehicle, the present invention is also applicable to passenger cars equipped with a power generating engine. Further, the temperature set value shown in the present embodiment is an example, and is a numerical value that changes depending on the type of the internal combustion engine, usage conditions, and the like. Further, the turning on / off of the rotation of the blower is not limited to the charging / discharging oil of the fluid coupling, but may be the connection / disconnection of the clutch.

[0014]

According to the present invention, when vehicle noise is a problem, such as when stopping at a station, the frequency of rotation of the cooling water cooling blower of the internal combustion engine is reduced as much as possible to reduce the noise. Can be.

[0015]

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing a configuration of an engine cooling device for a railway diesel vehicle.

FIG. 2 is a flowchart showing the logic of a conventional blower on / off command means.

FIG. 3 is a time chart showing a temporal change of a cooling water temperature when a conventional station stops.

FIG. 4 is a flowchart showing the logic of a blower on / off command unit according to an embodiment of the present invention.

FIG. 5 is a time chart showing a temporal change of a cooling water temperature when a station stops according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Diesel engine 2 ... Propulsion shaft 3 ... Driving wheel 4 ... Auxiliary drive shaft 5 ... Belt 6 ... Blower 7 ... Charging generator 8 ... Air compressor 9 ... Cooling water 10 ... Cooling water outlet 11 ... Cooling water pipe (outgoing path) 12 ... Heat radiator 13 ... Cooling water pipe (return path) 14 ... Cooling water inlet 15 ... Temperature Sensor 16 ・ ・ ・ Cooling water temperature information 17 ・ ・ ・ Blower on / off command means 18 ・ ・ ・ Blower on / off temperature set value 19 ・ ・ ・ Blower on / off command 20 ・ ・ ・ Charging / draining fluid coupling 21 ・ ・ ・Cooling air 22 ・ ・ ・ Crew or point information 23 ・ ・ ・ Blower on / off temperature set value change command

Claims (2)

[Claims] 1. An internal combustion engine cooling device for a vehicle having a function of controlling ON / OFF of a rotation of a cooling water cooling blower according to a temperature of cooling water of the internal combustion engine, wherein the rotation of the blower is ON / OFF controlled. An engine cooling device for a vehicle, comprising: means for setting a temperature setting value of cooling water by a crew member. 2. An engine cooling device for a vehicle having a function of turning on and off the rotation of a cooling water cooling blower in accordance with the temperature of the cooling water of the internal combustion engine. A vehicle for detecting a state of the blower, and a controller for changing a temperature set value of the cooling water for turning on / off the rotation of the blower based on the state and reducing a rotation frequency of the blower. Engine cooling system.