JP2007212371A - Engine testing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a warming-up time of an engine and reduce power consumption and burn-out fuel thereof, and to prevent localized heating of the engine and malfunction of electrical components. <P>SOLUTION: The engine testing device includes a heating coil 5 connected to a high-frequency power supply in the circumference of the oil pan section 2a of the engine 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a test apparatus for gasoline engines and diesel engines used for automobiles, industrial machines, construction machines, small ships and the like.

The engine that has completed the assembly process is a single unit, and a test operation is performed for checking malfunctions such as abnormal noise and confirming performance. In this case, it is necessary to warm up the engine completely. There are various methods for warming up the engine: (1) idling operation, (2) operation at a speed higher than idling for a predetermined time, and (3) hot water from the outside to the engine cooling system. There are those that circulate, (4) those that heat and inject engine oil, and (5) those that heat the entire engine by induction heating, as disclosed in Patent Document 1.
JP-A-8-222361

  The conventional warm-up methods described above have problems. First, (1) the idling operation method takes time to warm up. That is, about half of the test time of one engine is the time required for warm-up operation, and the tact time of the engine test also takes time. (2) The method of operating for a predetermined time at a rotational speed equal to or higher than idling has a negative impact on the environment due to the generation of noise, increases the amount of fuel consumed, and also takes time to warm up. (3) Furthermore, the method of circulating hot water from the outside to the engine cooling system requires a large facility for heating the cooling water. In addition, since it is difficult to completely warm up only with hot water circulation, it is necessary to use rotation more than idling. (4) Also, the method of heating and injecting engine oil requires a large facility for heating the engine oil, and it is difficult to warm up completely only by injecting heated oil. It was necessary to use rotation more than idling. (5) Also, in the method of heating the entire engine by induction heating, the electric power of the heating device increases, and the engine is made of a different metal, so a temperature difference occurs in the heating, and the temperature is partially very high. As a result, cracks and the like occurred, and electrical component malfunctions occurred.

  The present invention has been made to solve the above-described problems, and can greatly reduce the engine warm-up time, greatly reduce the engine test tact time, The power consumption and fuel consumption for the engine can be reduced, and there is no need for equipment to heat the cooling water or engine oil, cracks in the engine, or malfunction of electrical components. An object of the present invention is to obtain an engine test apparatus capable of preventing the above-described problems.

  An engine test apparatus according to claim 1 of the present invention is an engine test apparatus in which a dynamometer is connected to an engine to test the engine, and a heating coil connected to a high frequency power source is provided in an oil pan portion of the engine. is there.

  The engine test apparatus according to claim 2 divides the heating coil into a plurality of parts, and each divided part is formed by an elastic mold coil that follows the shape of the oil pan part of the engine.

  In the engine test apparatus according to claim 3, each divided portion is adsorbed to the surface of the oil pan portion of the engine by a magnet.

  An engine test apparatus according to a fourth aspect of the present invention has an automatic connection structure between an engine mounted on a pallet and a dynamometer, and an automatic connection pin electrically connected to a heating coil is provided on the pallet. In automatic connection, the automatic connection pin is automatically connected to a power supply terminal provided on the dynamometer side.

  The engine test apparatus according to claim 5 is provided with a temperature sensor for preventing overheating in an oil pan portion of the engine.

  As described above, according to the first aspect of the present invention, since the heating coil connected to the high frequency power source is provided in the oil pan portion of the engine, the oil oil is circulated in the engine by induction heating of the oil pan portion. Heated, engine warm-up time is greatly reduced, and engine test tact time is also greatly reduced. For this reason, power consumption and fuel cost for the test can be reduced. Moreover, since the entire engine is not heated, abnormal local overheating and malfunction of electrical components do not occur. Further, since only the thin oil pan section is heated, the capacity of the high frequency power supply device can be reduced.

  According to the second aspect, the heating coil is divided into a plurality of parts, and each divided part is formed by an elastic molded coil that conforms to the shape of the oil pan part of the engine. In addition to being environmentally friendly (oil and water resistant), it is also safe.

  According to the third aspect, since each divided portion of the heating coil is adsorbed to the surface of the oil pan portion of the engine by the magnet, the heating coil can be easily attached to and detached from the engine.

  According to claim 4, when the engine and the dynamometer are automatically connected, the automatic connection pin electrically connected to the heating coil of the pallet is automatically connected to the power supply terminal provided on the dynamometer side. Thus, electrical connection is facilitated during engine testing, and the tact time of engine testing can be greatly reduced.

  According to the fifth aspect, since the temperature sensor for preventing overheating is provided in the oil pan portion, overheating of the engine can be prevented.

  The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of an engine test apparatus according to the best mode of the present invention. Reference numeral 1 denotes a test chamber for performing a drive test of the engine 2, and an engine 2 and a dynamometer 3 are detachably provided in the interior of the test chamber. An oil pan 2a for storing engine oil protrudes from the lower portion of the engine 2 and is provided around the oil pan 2a in order to provide flexibility in accordance with the shape of the oil pan 2a. A divided heating coil 5 is arranged. The engine 2 is mounted on the pallet 4. In addition, an inverter panel 6 for supplying high-frequency power having a frequency of 10 to 50 kHz to the heating coil 5 is provided in the test chamber 1, and an inverter control panel 7 for controlling the inverter panel 6 is provided outside the test chamber 1. The control panel 7 is connected to a power supply of 3φ200V, 6kVA. An engine control panel 8 that drives and controls the engine 2 is provided outside the test chamber 1.

  2 (a) and 2 (b) show a plan view and a front view of the heating coil 5, and the heating coil 5 is divided into four divided portions 5a to 5d electrically connected in series via a connection line 9, Each of the divided portions 5a to 5d is formed into a flat rectangular mold coil having elasticity so as to be deformable along the shape of the oil pan portion 2a. A silicon rubber 5e protrudes and is attached to each of the divided portions 5a to 5d, and a magnet 5f is provided on the silicon rubber 5e, and each of the divided portions 5a to 5d is attracted to the surface of the oil pan portion 2a via the magnet 5f. The In this embodiment, the magnet 5f is provided on the protruding silicon rubber 5e. However, the present invention is not limited to this. The divided portions 5a to 5d are connected to each other through a silicon rubber 5g. The heating coil 5 is prepared on the pallet 4 by the number of pallets 4 (for example, 20 sets), and when the engine 2 is set on the pallet 4, the heating coil 5 is also set in advance. Further, a temperature sensor (thermo switch) 10 for preventing overheating is attached to the oil pan portion 2a, and the terminal of the heating coil 5 and the terminal of the temperature sensor 10 are connected to the automatic connection pin 11a of the pallet 4 via connection wires 12a and 12b. , 11b, and the automatic connection pins 11a, 11b are connected to the power supply terminal 3a and the control terminal 3b provided on the dynamometer 3 side so as to be detachable, and when the dynamometer 3 is connected to the engine 2, the automatic connection pins 11a and 11b are automatically connected to the terminals 3a and 3b. The terminals 3a and 3b are connected to the inverter board 6 and the inverter control board 7 through connection lines 13a and 13b, and the inverter board 6 is connected to the inverter control board 7 through a power supply line 14a and a control line 14b. In FIG. 2, the automatic connection pin 11b and the terminal 3b are not shown.

  In the above configuration, an engine test procedure will be described. First, the engine 2 is mounted on the pallet 4 and the heating coil 5 is adsorbed on the surface of the oil pan portion 2a. The terminal of the heating coil 5 and the terminal of the temperature sensor 10 attached to the surface of the oil pan 2a are already connected to the automatic connection pins 11a and 11b on the pallet 4 (shown in FIG. 1A). Engine oil is injected into the engine 2. In this state, the pallet 4 is transported to the vicinity of the dynamometer 3 in the test chamber 1, and the two are automatically connected. The automatic connection pins 11a and 11b and the terminals 3a and 3b are also automatically connected simultaneously. Next, cooling water and fuel are supplied to the engine 2 to start the engine 2. Next, high frequency power is supplied to the terminal 3a of the inverter panel 6, power is supplied to the heating coil 5, the oil pan portion 2a is heated by induction heating, thereby heating the engine oil circulating inside the engine 2, and the engine Warm 2 up. When warm-up is complete, stop heating. In this state, the engine test is started and completed. Next, the pallet 4 is separated, transported, engine oil and cooling water are removed, the heating coil 5 and the temperature sensor 10 are removed, the engine 2 is removed, and the next engine 2 test is performed. To do.

  In the above-described best embodiment, since the heating coil 5 connected to the high frequency power source is provided around the oil pan portion 2a of the engine 2, the oil oil is heated in the oil pan portion 2a and circulates inside the engine 2. Is heated, and the warm-up time of the engine 2 is greatly shortened. For example, for a 3000 CC diesel engine, the warm-up time is reduced from about 9 minutes to 5 minutes. FIG. 3 shows engine oil temperature rise comparison characteristics (the horizontal axis indicates the engine warm-up elapsed time, and the vertical axis indicates the engine oil temperature rise). The conventional warm-up time without induction heating is about 9 minutes (idling rotation). In the above-mentioned best embodiment of the present invention with induction heating, the warm-up completion time is about 5.2 minutes. In addition, since the warm-up time is shortened, the tact time of the engine test is also greatly shortened. For this reason, power consumption and fuel cost for the test can be reduced. Moreover, since the entire engine is not heated, abnormal local overheating and malfunction of electrical components do not occur. Furthermore, since only the thin oil pan portion 2a is heated, the capacity of the high-frequency power supply device can be reduced.

  In addition, since the heating coil 5 is divided into a plurality of parts and each of the divided parts 5a to 5d is formed by an elastic molded coil that follows the shape of the oil pan part 2a, it can be used for various types of engines 2. Excellent environment (oil and water resistance) and safety. Further, since the divided portions 5a to 5d of the heating coil 5 are attracted to the surface of the oil pan portion 2a of the engine 2 by the magnet 5f, the attachment and detachment of the heating coil 5 to the engine 2 are facilitated. Further, since the temperature sensor 10 for preventing overheating is provided in the oil pan portion 2a, when the temperature of the oil pan portion 2a exceeds a predetermined temperature, the power supply of the high frequency power source to the heating coil 5 is reduced or stopped. By doing so, overheating of the engine 2 can be prevented.

  Furthermore, when the engine 2 and the dynamometer 3 are automatically connected, the power supply terminal provided on the dynamometer 3 side with the automatic connection pins 11a and 11b electrically connected to the heating coil 5 and the temperature sensor 10 of the pallet 4 3a and the control terminal 3b are automatically connected to each other, so that electrical connection is facilitated during the engine test, and the tact time of the engine test can be greatly shortened.

1 is a configuration diagram of an engine test apparatus according to an embodiment of the present invention. It is the top view and block diagram of the heating coil by this Embodiment best mode. It is the engine oil temperature rise comparison characteristic figure by the past and this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 ... Engine 2a ... Oil pan part 3 ... Dynamometer 3a ... Power supply terminal 3b ... Control terminal 4 ... Pallet 5 ... Heating coil 5a-5d ... Divided part 6 ... Inverter panel 10 ... Temperature sensor 11a, 11b ... Automatic connection pin

Claims (5)

  An engine test apparatus for testing an engine by connecting a dynamometer to an engine, wherein an engine oil pan is provided with a heating coil connected to a high-frequency power source.   2. The engine test apparatus according to claim 1, wherein the heating coil is divided into a plurality of parts, and each divided part is formed by an elastic molded coil that follows the shape of the oil pan portion of the engine.   3. The engine test apparatus according to claim 2, wherein each of the divided portions is adsorbed on the surface of an oil pan portion of the engine by a magnet.   The engine and dynamometer mounted on the pallet have an automatic connection structure, and an automatic connection pin electrically connected to the heating coil is provided on the pallet, and the automatic connection pin is used when the engine and dynamometer are automatically connected. The engine test apparatus according to claim 1, wherein the engine test apparatus is automatically connected to a power supply terminal provided on the dynamometer side. The engine test apparatus according to any one of claims 1 to 4, wherein a temperature sensor for preventing overheating is provided in an oil pan portion of the engine.

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