JPH0554903B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an engine cold start test cooling device that cools the engine, cooling water around the engine, engine oil, transmission oil, etc. during the cold start test. In particular, the present invention relates to a cooling system for low-temperature engine start tests, which is made into a unit so that low-temperature start tests can be performed even with existing engine test equipment at room temperature.

[Prior Art] Conventionally, a low-temperature engine start test of a vehicle assuming a cold region is performed by housing the vehicle in a low-temperature environment test chamber.

In addition, cooling of various parts of the engine, such as cooling water, oil, and fuel, is performed using large-sized cooling equipment provided.

[Problems to be Solved by the Invention] Conventionally, when performing a low-temperature start test of an engine, a low-temperature environmental test chamber and a built-in cooling facility are required. Therefore, it is not possible to perform a cold start test of an engine using existing engine test equipment at room temperature.

Furthermore, in the past, it was necessary to provide separate cooling equipment for the low-temperature environment test chamber and cooling equipment for each part of the engine, which resulted in problems such as increased costs and the need for complicated piping.

[Objective] Therefore, in order to solve these conventional problems, an object of the present invention is to enable a cold start test of an engine in an existing normal temperature test chamber.

[Means for Solving the Problems] In order to achieve this object, the engine cold start test device of the present invention is provided with a housing box for housing the engine, an air processor for cooling the inside of the housing box, and a low-temperature brine. A cooling unit is provided, which is a unit consisting of a brine cooler that produces a heat exchanger, a brine tank connected to the brine cooler, and a heat exchanger connected to the brine tank. It has a structure in which engine cooling water, oil, fuel, etc. from the heat exchanger that is supplied to the engine and cooled by brine is supplied to the engine and each cooled part around the engine through a piping system. be.

[Function] In the present invention, the air treatment machine that cools the engine storage box and the equipment that cools each part of the engine are integrated into one.

This makes it possible to share low-temperature brine, which reduces the size of the equipment and facilitates temperature control.

Furthermore, if the cooling unit is installed in a room-temperature test chamber, a low-temperature start test of the engine can be easily performed even without a low-temperature environment test chamber.

[Example] Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 1 is a schematic perspective view of a cooling device for an engine cold start test according to an embodiment of the present invention, and FIG. 2 is a configuration diagram thereof.

In FIGS. 1 and 2, an engine 1 of a car or the like installed in a normal temperature test chamber is covered with a storage box 2, and the surroundings of the engine 1 are covered by this storage box 2. . The power shaft 3 of the engine 1 is connected to a dynamometer 4 outside the storage box 2. Engine 1 exhaust pipe 5
is led out of the storage box 2, and the exhaust gas is exhausted outside the storage box 2.

Further, a cooling unit 6 is provided in which equipment for cooling the inside of the storage box 2, the engine 1, and the surroundings of the engine are combined into a unit. If the engine 1 to be subjected to the low-temperature start test has a capacity of about 3000 c.c., the cooling unit 6 has a width of 2.3 m, a length of 4 m, and a height of, for example, 3000 c.c.
It is housed in a housing 7 that is approximately 2m long. Here, around one engine, the cooling water of engine 1, engine oil 27, transmission oil 32,
They are a battery 45, a fuel 38, etc.

To explain the configuration of the cooling unit 6, for example, an air processing machine 8 that sucks outside air to dehumidify and cool it.
is built in, and this air treatment device 8 dehumidifies and
The cooled low-temperature air is sent into the storage box 2 via a flexible tube 9 that connects the cooling unit 6 and the storage box 2. The air in the air treatment machine 8 is cooled by low-temperature brine supplied from a brine tank 10, which will be described later. As a result, the air inside the storage box 2 is changed to low-temperature air (for example, -25°C).
At the same time, the main body of the engine 1 is cooled down. Note that a silencer for noise reduction may be provided at the low-temperature air discharge port of the air treatment machine 8.

The cooling unit 6 also incorporates a brine cooler 11 that produces a low-temperature brine (low-temperature liquid refrigerant) for cooling the engine and other parts. The low temperature brine produced by the brine cooler 11 is sent to the brine tank 10 within the unit 6. Further, the heated brine sent to a heat exchanger to be described later and returned to the brine tank 10 is returned to the brine cooler 11 by a built-in pump 12.

Further, a part of the low-temperature brine produced by the brine cooler 11 is sent to the cooling coil 46 in the storage box 2 via the joint 13 attached to the front panel of the housing 7. At this time, the brine passes through the pipe 34 between the cooling unit 6 and the storage box 2. Air inside the storage box 2 is passed through the cooling coil 46 by a fan 15, and the inside of the storage box 2 is cooled for a short period of time (for example, about 15 minutes) after the engine 1 is started.

The cooling unit 6 also includes a brine tank 10.
The cold brine in the heat exchanger 17, 18, 1 is supplied by a pump 16 built into the unit 6.
9 and 20 are incorporated.

Cooling water (antifreeze) from the engine 1 is circulated through the heat exchanger 17 by a pump 21 in the unit 6 via a joint 14 on the panel surface of the cooling unit 6. At this time, the cooling water passes through the pipe 25 between the unit 6 and the storage box 2. Note that during the low temperature start test, the water in the provided cooling water cooler 22 used during the normal temperature test is drained by opening the on-off valve 23. As a result, the engine 1 cooling water made of antifreeze is cooled to the temperature required for the cold start test.

In addition, engine oil 27 from the engine 1 is circulated to the heat exchanger 18 by a pump 28 in the unit 6 through a joint 24 on the panel surface of the unit 6 and through a pipe 26 between the unit 6 and the storage box 2. do. Thereby, the engine oil 27 is cooled to a predetermined low temperature.

Further, the heat exchanger 19 is connected to the piping 3 between the unit 6 and the storage box 2 via the joint 29 on the panel surface.
0, transmission oil 32 in the transmission 31 is circulated by a pump 33 built into the unit 6. This cools the transmission oil 32.

Further, fuel 38 in a fuel tank 37 outside the storage box 2 is circulated through the heat exchanger 20 via a joint 35 on the panel surface and through a pipe 36 by a pump 39 built into the unit 6. Thereby, the fuel 38 in the fuel tank 37 is cooled to a predetermined temperature. Fuel 38 in the fuel tank 37 is supplied to the engine 1 in the storage box 2.

Here, the heat exchangers 17, 18, 19, 20
Thermoswitches 40, 41, 42, and 43 are provided in the piping connecting the engine and each cooling element around the engine.

Further, the cooling unit 6 includes an operation panel 44 having a control section for controlling each device in the unit 6.
Located on the front panel.

Next, to explain the startup test operation of the engine cold start test cooling system having such a configuration, before the low temperature start test is performed, the air processing unit 8 in the cooling unit 6 The atmosphere inside the housing box 2 and the engine 1 are cooled to a predetermined temperature (for example, -25°C) by the low-temperature air.
In addition, cooling water around the engine, engine oil 27, transmission oil 32, fuel 38
Each of the cooling elements is cooled to a predetermined temperature by the low temperature brine produced by the brine cooler 11 in the cooling unit 6.

After that, the engine 1 is started, and the starting performance data of the engine 1 under each low temperature is displayed on the dynamometer 4.
It is measured by

In addition, for about 15 minutes after the engine 1 is started until the start test is completed, the on-off valve 48 is opened to flow low-temperature brine to the cooling coil 46, the fan 15 is operated, and the storage box 2 is The atmosphere inside is cooled. This is to prevent an increase in the atmospheric temperature within the housing box 2 due to heat generated by the started engine 1, and to enable a starting test to be performed under ideal natural conditions assuming a cold region.

The low-temperature air produced by the air treatment machine 8 is sent to the intake port 4 of the air cleaner 47 of the engine 1.
It is discharged near 7a and is also used as intake air for the engine 1 after starting.

In this way, the above-mentioned engine cold start test cooling device can be used even in a normal temperature test room without low temperature test equipment by preparing the storage box 2 and the cooling unit 6.
A cold start test can be easily performed.

[Effects of the Invention] As explained above, in the present invention, for example, a housing box is provided to cover an engine installed in a dynamometer in a normal temperature test chamber, and the atmosphere inside the housing box, the engine inside the housing box, and the surroundings of the engine are A cooling unit is provided in which the equipment for cooling the equipment is integrated into one unit.

Therefore, a low-temperature start test of an engine can be easily performed not in a low-temperature test room but also in a normal-temperature test room where low-temperature test equipment is not installed.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of a cooling device for an engine cold start test according to an embodiment of the present invention, and FIG. 2 is a configuration diagram of the cooling device. In the diagram, 1...engine, 2...accommodation box, 3...
Power shaft, 4... Dynamometer, 5... Exhaust pipe, 6... Cooling unit, 7... Housing, 8... Air treatment machine, 9
... Flexible tube, 10 ... Brine tank, 11 ... Brine cooler, 12, 16, 2
1, 28, 33, 39...pump, 13, 14,
24, 29, 35...Joint, 15...Fan, 1
7, 18, 19, 20... Heat exchanger, 22... Cooling water cooler, 23, 48... Opening/closing valve, 25, 2
6, 30, 34, 36...Piping, 27...Engine oil, 31...Transmission, 32...
...Transmission oil, 37...Fuel tank, 38...Fuel, 40,41,42,43...
Thermo switch, 44...operation panel, 45...battery, 46...cooling coil, 47...air cleaner, 47a...intake port.

Claims (1)

[Claims] 1.In addition to providing a storage box to accommodate the engine, an air treatment machine that cools the inside of the storage box, a brine cooler that produces low-temperature brine, a brine tank connected to this brine cooler, and a heat exchanger connected to the brine tank. A cooling unit is provided, in which cold air from the air treatment machine is supplied into the engine storage box through a hose, and engine cooling water, oil and fuel from the heat exchanger cooled by brine are provided. A cooling system for low-temperature engine start tests in which water is supplied to the engine and each cooled part around the engine through a piping system.