JP4154257B2 - Vehicle drive system component testing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to components of a vehicle drive system to be tested when performing a performance test of a vehicle drive system such as a vehicle engine, a clutch, a transmission, a propulsion shaft, and a final reducer installed in a test apparatus. Regarding cooling.
[0002]
[Prior art]
The vehicle drive system test includes a test in which the engine is started in a state where the components of the drive system are cooled, and the startability, behavior of the drive system, cleanliness of exhaust gas, etc. are inspected. In such a test, it is necessary to cool the component to be tested to room temperature or a predetermined temperature. Conventionally, the drive system is stationary and naturally cooled, or the fan is blown and cooled. There is also a test apparatus that cools a vehicle and an engine with air cooled by a refrigeration apparatus (for example, Patent Document 1).
[0003]
[Patent Document 1]
Registered Utility Model No. 3014252 [0004]
[Problems to be solved by the invention]
In the conventional method, cooling may take half a day or more, and the time required for the test is long, and the period of occupying the equipment is also long, resulting in poor efficiency.
[0005]
An object of the present invention is to efficiently cool a drive system of a vehicle during a test in a stationary state and complete the cooling in a short time.
[0006]
[Means for Solving the Problems]
In the present invention, a mist of a cooling medium, that is, fine particles of a liquid medium drifting in the air, is sent on a component of a vehicle drive system to be tested in an air stream, and the heat of vaporization of the medium is used. To cool the components. By using the heat of vaporization, it is possible to achieve a heat exchange rate of about 100 times that when only air is used, and cooling can be completed more quickly.
[0007]
In order to form the airflow for sending the mist, a blower fan for sending the airflow and a suction fan for sucking the airflow are provided, and the direction and path of the flow can be controlled by controlling these fans. Under the floor under the actual vehicle, it is arranged extending in the longitudinal direction of the vehicle, and an underfloor duct in which the plurality of suction fans are arranged is provided in the extending direction, and the suction fans are separately controlled by the control unit.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention (hereinafter referred to as embodiments) will be described with reference to the drawings. FIG. 1 shows a schematic configuration of an actual vehicle test apparatus 12 for testing a vehicle 10 according to the present embodiment. The vehicle 10 is fixedly installed on the floor of the test chamber 14, and its driving wheels are placed on rollers (not shown). A dynamo is coupled to the roller, and the power transmitted from the drive wheel to the roller can be absorbed by this dynamo.
[0009]
The actual vehicle test apparatus 12 includes a vehicle wind speed fan 16 that generates an airflow corresponding to the wind received by the vehicle during traveling. The airflow created by the vehicle wind speed fan 16 passes through the front duct 18 and is sent from the front of the vehicle 10 toward the vehicle. Further, under the floor of the test room, an underfloor duct 20 is arranged extending in the direction of the longitudinal axis of the vehicle, and a plurality of, in this embodiment, six suction fans 22 are arranged in the extending direction. These suction fans 22 are arranged so as to be located under the vehicle 10 and suck in the air between the vehicle 10 and the floor of the test chamber 14 and contribute to the formation of an appropriate air flow. By separately controlling the plurality of suction fans 22, it is possible to form an airflow that can be cooled more efficiently. On the ceiling of the test chamber 14, an exhaust fan 24 that exhausts warm air accumulated near the ceiling is disposed.
[0010]
Located downstream of the front duct 18 is a mist generator 26 which forms a mist of a liquid cooling medium, preferably water. Water and air are sent from the water supply unit 28 and the air supply unit 30 to the mist generator 26, where the water is made into fine particles that float in the air, and is sent out toward the vehicle 10 in the airflow. It is. The water supply unit 28 includes a water tank 32 and a temperature adjustment unit 36 that controls the temperature of the water in the water tank 32 to an appropriate value based on the detection value of the water temperature sensor 34. The temperature control unit 36 adjusts the water temperature in the water tank 32 to a previously obtained water temperature so that a sufficient cooling effect can be obtained. The air supply unit 30 includes an air tank 40 that stores the air compressed by the compressor 38 and a valve 42 that controls the delivery of the compressed air. When the valve 42 is opened, compressed air is sent to the mist generator 26, and the compressed air blows off water to form fine particles to form mist.
[0011]
The vehicle 10 has a drive system including an engine 44 and an automatic transmission 46. At a predetermined position of the drive system, at least one drive system temperature sensor 48 for detecting the temperature at the position is arranged.
[0012]
Operations of the vehicle wind speed fan 16, the suction fan 22, and the valve 42 are controlled by the control unit 50. The control unit 50 controls the operation of the vehicle wind speed fan 16, the suction fan 22, and the valve 42 by controlling the operations of the vehicle wind speed fan 16, the suction fan 22, and the valve 42 in accordance with predetermined control or by correcting predetermined control based on the detected temperature of the drive system temperature sensor 48. Cool the system. The contents of control by the control unit 50 can be obtained in advance by experiments or the like so that a sufficient cooling effect can be obtained. Also, different controls can be stored and executed depending on different vehicle types such as the configuration of the drive system. When the mist sprayed by the mist generator 26 adheres to the surface of the drive system of the vehicle 10, it vaporizes and cools the components constituting the drive system. By utilizing the heat of vaporization, a heat exchange rate of about 100 times can be obtained in the case of air alone, and the drive system can be cooled in a short time.
[0013]
In this embodiment, the mist generator 26 is configured to spray normal pressure water with compressed air. However, the mist generator 26 sprays normal pressure water with a normal pressure air flow, and sprays pressurized water with a normal pressure air flow. Further, it is possible to form mist by a method such as spraying pressurized water with compressed air.
[0014]
Further, by reversing the suction fan 22 and further installing a mist generator here, the mist can be sent from the lower surface side of the vehicle, and cooling under the vehicle floor can be performed more efficiently. At this time, the exhaust fan 24 can exhaust the warmed air and water vapor from which the mist has evaporated, thereby promoting cooling.
[0015]
Moreover, although this embodiment demonstrated regarding the apparatus which cools the drive system in the state mounted in the vehicle, it cools the drive system which was taken down from the vehicle and set to the bench, and components, such as an engine and a transmission, etc. Similarly, cooling by mist can be performed when cooling is set on each bench.
[Brief description of the drawings]
FIG. 1 is a diagram showing a schematic configuration of an actual vehicle test apparatus according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Vehicle, 12 Actual vehicle test apparatus, 16 Car wind speed fan, 22 Suction fan, 26 Mist generator, 44 Engine, 46 Automatic transmission, 50 Control part.

Claims (2)

In a test apparatus that conducts tests on vehicle drive system components in an actual vehicle ,
Mist generating means for generating mist of the cooling medium;
An airflow generating means for generating an airflow for sending the mist to the surface of the part under test;
Have
The airflow generation means includes a blower fan that sends the airflow to a component to be cooled, and a suction fan that sucks an airflow around the component to be cooled ,
Furthermore, the test apparatus
An underfloor duct disposed under the floor under the actual vehicle so as to extend in the direction of the longitudinal axis of the vehicle, and in which the plurality of suction fans are disposed;
A control unit that controls the suction fan separately and can control the flow direction and path;
Have
A test apparatus for vehicle drive system components, wherein the components are cooled by heat of vaporization of the mist. 2. The test apparatus for vehicle drive system components according to claim 1, wherein a mist generator is further installed in the underfloor duct, and the suction fan is reversed by the control unit so as to be cooled from the lower surface of the vehicle.

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