JP4578436B2 - Oil changer for engine test - Google Patents

Description

  The present invention relates to an engine test oil changer tem used when testing an engine of a self-propelled vehicle such as an automobile. More specifically, the present invention relates to an oil pan that is newly supplied to an oil pan of an engine as a specimen while the oil pan is kept at a low temperature. The present invention relates to an oil changer for engine testing that can be supplied to the engine.

  2. Description of the Related Art Conventionally, an engine for a self-propelled vehicle such as an automobile has been subjected to an engine test in a state where it is mounted on a vehicle by an environmental test device or a performance test of the engine alone by an engine bench test device (for example, Patent Document 1 or Patent) In this performance test, during the cold start test of the test engine, there is an oil replacement work for replacing the hot oil stored in the oil pan of the test engine with the cold oil. The change work is performed by an oil changer having the configuration shown in FIG.

  In order to replace the oil, first, the automatic valve 21 of the oil drain pipe 20 is opened, and used oil (which is stored in the oil pan 14a of the engine 14 which is a specimen to be installed in the test chamber 13 surrounded by the heat insulating material 13a ( (Not shown) passes through the oil drain pipe 20 and the automatic valve 21 and is collected in a recovery tank (not shown). Next, the automatic valve 21 of the oil drain pipe 20 is closed and the automatic valve 18 of the supply pipe 17 is closed. The new low-temperature oil 16 that is opened and stored in the oil supply tank 15 passes through the supply pipe 17 and the automatic valve 18 by the pump 19 and is supplied and filled into the oil pan 14 a of the engine 14 in the test chamber 13.

Further, when the supply pipe 17 is heated by the heat generated by the engine 14 and the oil supply tank 15 becomes high temperature, the heat of the supply pipe 17 is transferred to the oil supply tank 15 and the low temperature oil 16 stored in the oil supply tank 15. In order to prevent the temperature of the oil 16 from rising due to the action, it is installed at a distance from the engine 14.
Japanese Patent Laid-Open No. 9-15102 (pages 1-6, FIG. 1) Japanese Utility Model Publication No. 7-23259 (pages 1 and 2, Fig. 1)

  However, when the high-temperature used oil (not shown) stored in the oil pan 14a of the engine 14 is replaced with the oil 16 stored in the oil supply tank 15, the engine 14 is appropriately cooled, and the engine 14 The supply pipe 17 from the oil supply tank 15 connected to the oil pan 14 a is also indirectly cooled by receiving the cooling process of the engine 14. However, when the supply pipe 17 becomes high temperature due to heat generation of the engine 14, In order to prevent oil from reaching the oil supply tank 15, the distance between the oil pan 14a of the engine 14 and the oil supply tank 15 is lengthened. Distant places cannot be cooled sufficiently, so the newly supplied low temperature oil 16 is The temperature of the oil 16 has a problem that rises while passing through the part not completely cool the feed tube 17. In addition, there was a time loss such as waiting for the start of the test until the temperature of the oil 16 decreased to a temperature at which the test could be started.

  An oil pan 14a of the engine 14 includes a supply pipe 17 connected to an oil supply tank 15 for storing oil 16 to be newly supplied, and a collection tank (not shown) for collecting used oil (not shown). The oil pan 14a of the engine 14 to which one of the conduits (for example, the oil exhaust pipe 20) is connected must be connected. In addition to the existing oil drain port 14b, a connection port 14c for connecting the other conduit (for example, the supply tube 17) has to be additionally processed. It took.

  Further, from the above, the oil pan 14a of the engine 14 has an oil drain pipe 20 connected to a collection tank (not shown) for collecting used oil (not shown), and newly supplied oil 16 In order to connect the two conduits of the supply pipe 17 (the supply pipe 17 and the oil drain pipe 20) connected to the oil supply tank 15 for storing the oil, two connection ports of the oil drain port 14b and the connection port 14c are provided. A normal engine oil pan has only one discharge port (oil drain port 14b) for discharging used oil. Therefore, the form of the engine 14 is the same as the form of the engine mounted on the vehicle. Not so, the engine test lacked accuracy.

  In the present invention, when supplying new oil to the oil pan of the test engine, the oil can be supplied without increasing the temperature of the oil, and the oil drain port provided in the oil pan of the test engine is used to supply the oil. An oil changer for engine tests that can be replaced can be provided.

The other end of the oil supply pipe whose one end is connected to the oil supply tank is connected to the first port of the switching means provided in the vicinity of the engine as a specimen through a pump, and one end is connected to the second port of the switching means. The other end of the joint pipe is connected to the oil pan of the engine, and the base end of the oil drain pipe is connected to the third port of the switching means. The switching means discharges the oil in the engine when the oil is discharged from the engine. With the first port closed, the second port and the third port are communicated to guide the used oil in the oil pan to the oil discharge pipe to be discharged to the outside, and then the second port is closed and the first port and the first port are closed. 3 ports are connected, and new oil from the oil supply tank is led from the switching means to the oil drain pipe to be discharged to the outside, and then the third port is closed and the first port and the second port are connected. New that allowed new oil from the oil supply tank via a joint pipe supplied to the oil pan, filling, also arranged a cooler to the oil supply pipe, to supply from the oil supply tank to the oil pan of the engine It is assumed that the oil can be cooled .

  Further, the switching means is constituted by a three-way branch pipe and an on-off valve disposed at the first to third branch ports of the three-way branch pipe.

  The switching means is constituted by a three-way switching valve.

  A three-way control valve is disposed between the oil supply pipe switching means and the pump, a pump-side oil supply pipe is connected to the first port of the three-way control valve, and a switch means oil supply pipe is connected to the second port. Further, the other end of the return pipe having one end connected to the oil supply tank is connected to the third port.

  When supplying new oil from the oil supply tank to the oil pan, the third port of the three-way control valve is opened and the opening degree is adjusted, and one of the new oil supplied from the oil supply tank is adjusted. The amount of oil supplied to the oil pan is adjusted by returning the part to the oil supply tank via the third port and the return pipe connected to the third port. .

In addition, the oil in the oil supply tank is cooled by the cooler while being circulated in a route returning from the third port of the three-way control valve to the return pipe and returning to the oil supply tank, so that the oil is always kept at a low temperature. It is configured to be able to do so.

  According to the engine test oil changer of the present invention, when the test engine oil is changed, the test engine oil is discharged to the oil recovery tank and then cooled by the cooler from the oil supply tank and in the middle thereof. Low temperature oil is allowed to flow through the oil recovery tank for a certain period of time to cool the conduit between the test engine oil pan and oil supply tank, which is still hot after the test engine cooling process, and after that cooling, the oil supply Low temperature oil cooled by a cooler in the middle of the tank is supplied and filled into the oil pan of the test engine, so that the newly supplied oil from the oil supply tank remains in a low temperature state. Can be supplied to the oil pan of the test engine.

  In addition, since a three-way control valve is provided between the oil supply pipe switching means and the oil feed pump, and a return pipe is provided between the third port of the three-way control valve and the oil supply tank, When supplying different oil from the oil supply tank to the oil pan of the test engine, supply of oil to the oil pan caused by the difference in oil feed speed (high speed, low speed) due to the difference in oil viscosity (high viscosity, low viscosity) When feeding low viscosity oil, the difference in time is such that part of this low viscosity oil is led from the oil supply pipe to the return pipe by the three-way control valve and returned to the oil supply tank, so the viscosity is different. (High viscosity, low viscosity) When supplying oil to the oil pan of the test engine, it is possible to match the filling time with the supply of high viscosity oil and low viscosity oil to the oil pan. Also in engine tests at, since the combined also drill down test conditions to the supply time of the oil, the results of the engine test performed by the oil of different viscosities becomes more accurate.

  In addition, the oil in the oil supply tank is cooled by a cooler while being circulated in a route returning from the third port of the three-way control valve of the oil supply pipe to the return pipe and returning to the oil supply tank, so that the oil is always kept at a low temperature. I can keep it. If the cooling temperature can be adjusted, a fine engine low-temperature start-up test can be performed.

  Since the oil of the test engine can be used to drain used oil and supply new oil using the oil drain port already installed in the oil pan of the test engine, In addition to the existing oil drain port, there is no need to add a new conduit connection port, and the oil conduit can be set quickly during engine testing.

  In addition, as described above, since it is not necessary to add a new pipe connection port to the oil pan of the test engine, the form of the test engine is the same as that of the engine mounted on the vehicle. Since only the mouth is provided, the test engine can be tested under the same conditions as those of the engine mounted on the vehicle, and a more accurate test can be performed.

Embodiments of an oil changer for engine testing according to the present invention will be described below based on specific examples shown in the accompanying drawings.
FIG. 1 is a block diagram showing an oil changer for engine testing according to the present invention, and the configuration is an oil of an oil pan 2a of an engine 2 as a specimen installed in a test chamber 1 surrounded by a heat insulating material 1a. A joint pipe 6 is connected between the drain port 2b and the second port 11b of the switching means 11 for switching the oil flow direction, and between the first port 11a of the switching means 11 and the oil supply tank 3. , is connected to the oil supply pipe 5 which is interposed between the pump 7 and cooler 8 and a three-way control valve 9, also the recovery tank used oil (illustration is omitted) in the third port 11c oil pan 2a to the switching means 11 (not shown) are connected to the oil discharge pipe 12 for discharging the.
A return pipe 10 is connected between the third port 9 c of the three-way control valve 9 and the oil supply tank 3.

When oil (not shown) in the oil pan 2a of the engine 2 is changed, first, the first port 11a of the switching means 11 is closed and the second port 11b and the third port 11c of the switching means 11 are communicated. the oil (not shown) in the oil pan 2a in the engine 2 by the recovery tank derived from the joint pipe 6 to the oil discharge pipe 12 (not shown) is discharged.
Discharge of oil, the drop in the installation position of the oil pan 2a and recovery tank of the engine 2 (not shown), the oil may be discharged by the free flowing, but to force discharged by the discharge means such as a pump, Good.

After the oil is discharged, the second port 11b of the switching means 11 is closed and the first port 11a of the switching means 11 is opened to allow the first port 11a and the third port 11c to communicate with each other. The first port 9a and the second port 9b are connected to each other, and the oil supply pump 3 to the oil discharge pipe 12 from the oil supply pipe 3 while the new oil 4 from the oil supply tank 3 is appropriately cooled by the cooler 8 by the pump 7 for oil supply. led recovery tank (not shown) to discharge a predetermined time, to cool the fuel supply pipe 5 between the oil pan 2a and the oil supply tank 3 of the engine 2 which is still hot after cooling process of the engine 2. The first port 9a and the second port 9b of the three-way control valve 9 are connected.

After the oil supply pipe 5 is cooled, the third port 11c of the switching means 11 is closed and the second port 11b of the switching means 11 is opened to allow the first port 11a and the second port 11b of the switching means 11 to communicate with each other. The oil pump 7 supplies and fills the oil pan 2a of the engine 2 through the joint pipe while properly cooling the new oil 4 from the oil supply tank 3 by the cooler 8 disposed in the oil supply pipe 5. .
Further, when new oil 4 from the oil supply tank 3 is supplied to the oil pan 2a of the engine 2, if the temperature of the oil 4 stored in the oil supply tank 3 is a temperature suitable for the test, cooling is particularly performed. Cooling by the vessel 8 may not be performed.

Further, as a specific example of the switching means described above, as shown in FIG. 2, it may be constituted by a three-way branch pipe 11d, a first on-off valve 11e, a second on-off valve 11f, and a third on-off valve 11g.
When the oil in the oil pan 2a of the engine 2 is discharged, the first on-off valve 11e is closed and the second on-off valve 11f and the third on-off valve 11g are connected to each other in the oil pan 2a in the engine 2. The oil is guided from the joint pipe 6 to the oil drain pipe 12 through the branch point of the three-way branch pipe 11d and discharged to the recovery tank (not shown).

  When cooling the above-described oil supply pipe 5, the second on-off valve 11f is closed and the first on-off valve 11e is opened to allow the first on-off valve 11e and the third on-off valve 11g to communicate with each other from the oil supply tank 3. The new oil 4 is led from the oil supply pipe 5 through the branch point of the three-way branch pipe 11d to the oil discharge pipe 12 and discharged to a recovery tank (not shown) for a certain period of time.

  When supplying the oil 4 to the oil pan 2a of the engine 2, the third on-off valve 11g is closed and the second on-off valve 11f is opened to connect the first on-off valve 11e and the second on-off valve 11f. New oil 4 from the supply tank 3 is guided from the oil supply pipe 5 to the joint pipe 6 through the branch point of the three-way branch pipe 11d and supplied to the oil pan 2a of the engine 2.

As another specific example of the switching means described above, a three-way switching valve 11h may be used as shown in FIG.
When the oil in the oil pan 2a of the engine 2 is discharged, the first valve 11i of the three-way switching valve 11h is closed and the second valve 11j and the third valve 11k are connected to each other to connect the oil pan 2a in the engine 2. the oil of the inner, recovery tank led to the oil discharge pipe 12 from the joint pipe 6 through the three-way valve 11h (not illustrated) is discharged.

  When cooling the oil supply pipe 5 described above, the second valve 11j of the three-way switching valve 11h is closed and the first valve 11i is opened to allow the first valve 11i and the third valve 11k to communicate with each other. The new oil 4 from the oil is guided from the oil supply pipe 5 to the oil discharge pipe 12 through the three-way switching valve 11h and discharged to a recovery tank (not shown) for a predetermined time.

  When supplying the oil 4 to the oil pan 2a of the engine 2, the third valve 11k is closed and the second valve 11j is opened to allow the first valve 11i and the second valve 11j to communicate with each other from the oil supply tank 3. The new oil 4 is guided from the oil supply pipe 5 to the joint pipe 6 through the three-way switching valve 11h and supplied to the oil pan 2a of the engine 2.

  The three-way control valve 9 disposed in the oil supply pipe 5 closes the second port 9b of the three-way control valve 9 and allows the first port 9a and the third port 9c to communicate with each other. Thus, the oil 4 stored in the oil supply tank 3 is circulated so as to be returned from the oil supply pipe 5 to the return pipe 10 and returned to the oil supply tank 3 while being appropriately cooled by the cooler 8. The temperature of the oil 4 to be performed can always be maintained at a predetermined low temperature.

The three-way control valve 9 is used to prevent a difference in supply time of the oil 4 to the oil pan 2a of the engine 2 caused by a difference in viscosity of the oil 4 when the oil 4 is fed by the pump 7.
The difference in supply time to the oil pan 2a of the engine 2 caused by the difference in viscosity of the oil 4 means that when an engine test is performed using oils having different viscosities (high viscosity, low viscosity), Since the flow resistance of the oil is larger than that of the low-viscosity oil, when the oil is fed by the pump 76, the oil viscosity of the high-viscosity oil is slower than that of the low-viscosity oil. This is the difference in the oil supply time that occurs when the high-viscosity oil takes longer than the low-viscosity oil.

  In order to eliminate the difference in the supply time to the oil pan 2a, a three-way control valve 9 is provided. Therefore, in order to match the supply time of the low-viscosity oil and the high-viscosity oil to the oil pan 2a of the engine 2, the three-way control valve opened by supplying the oil when the low-viscosity oil is fed. In addition to the first port 9a and the second port 9b, the third port 9c is opened and the opening degree of the third port 9c is adjusted appropriately, and the low viscosity sent from the oil supply tank 3 by the pump 7 A part of the oil is guided to the return pipe 10, and the amount of low-viscosity oil sent from the return pipe 10 to the oil supply tank 3 and sent to the oil pan 2 a of the engine 2 is reduced. The supply time to the second oil pan 2a can be matched with the supply time when high-viscosity oil is sent.

The block diagram which shows the oil change apparatus for engine tests which concerns on this invention. The block diagram which shows one structural example of the switching means. The block diagram which shows one structural example of the switching means. The block diagram which shows the oil change apparatus of the conventional test engine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Test chamber 1a Heat insulating material 2 Engine 2a Oil pan 2b Oil drain port 3 Oil supply tank 4 Oil 5 Oil supply pipe 6 Joint pipe 7 Pump 8 Cooler 9 Three-way control valve 9a 1st port 9b 2nd port 9c 3rd port 10 Return Pipe 11 Switching means 11a First port 11b Second port 11c Third port 11d Three-way branch pipe 11e First on-off valve 11f Second on-off valve 11g Third on-off valve 11h Three-way switching valve 11i First valve 11j Second valve 11k Third Valve 12 Oil drain pipe

Claims (6)

The other end of the oil supply pipe whose one end is connected to the oil supply tank is connected to the first port of the switching means provided in the vicinity of the engine as a specimen through a pump, and one end is connected to the second port of the switching means. The other end of the joint pipe is connected to the oil pan of the engine, and the base end of the oil drain pipe is connected to the third port of the switching means. The switching means discharges the oil in the engine when the oil is discharged from the engine. With the first port closed, the second port and the third port are communicated to guide the used oil in the oil pan to the oil drain pipe to be discharged to the outside, and then the second port is closed and the first port and the first port are closed. 3 ports are connected, and new oil from the oil supply tank is led from the switching means to the oil drain pipe to be discharged to the outside, and then the third port is closed and the first port and the second port are connected. New that allowed new oil from the oil supply tank via a joint pipe supplied to the oil pan, filling, also arranged a cooler to the oil supply pipe, to supply from the oil supply tank to the oil pan of the engine Oil changer for engine test that can cool the oil.   2. The oil changer for engine testing according to claim 1, wherein the switching means comprises a three-way branch pipe and an on-off valve disposed at the first to third branch ports of the three-way branch pipe.   The oil changer for engine testing according to claim 1, wherein the switching means is constituted by a three-way switching valve.   A three-way control valve is arranged between the oil supply pipe switching means and the pump, a pump-side oil supply pipe is connected to the first port of the three-way control valve, and a switching means-side oil supply pipe is connected to the second port. The engine test oil changer according to claim 1, wherein the other end of a return pipe having one end connected to the oil supply tank is connected to the third port.   When new oil is supplied from the oil supply tank to the oil pan, a part of the new oil supplied from the oil supply tank is opened by opening the third port of the three-way control valve and adjusting the opening degree. The oil supply amount to the oil pan is adjusted by returning the oil to the oil supply tank through the third port and the return pipe connected to the third port. The oil change apparatus for engine tests as described. The oil in the oil supply tank is cooled by the cooler while being circulated through a route that leads from the third port of the three-way control valve to the return pipe and returns to the oil supply tank, so that the oil can be kept at a low temperature at all times. The engine test oil changer as set forth in claim 4 , wherein

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