JP3523904B2 - Internal combustion engine performance evaluation device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a performance evaluation device for verifying and evaluating the performance of an internal combustion engine using a liquid transmission directly connected to the internal combustion engine and driven.

[0002]

2. Description of the Related Art The performance of an internal combustion engine (hereinafter referred to as an engine) mounted on a railway vehicle or the like has been conventionally tested and evaluated by various methods. A performance evaluation device for an internal combustion engine that can be more easily implemented is disclosed in Japanese Patent Application No. 4-349650 and Japanese Patent Application No. 4-349651.
No. (filed on November 13, 1992).

This performance evaluation device compares the horsepower that the engine should originally exert with the horsepower that the engine actually exerts, and the horsepower that the engine should essentially exert is the fuel injection amount and the engine speed. It was actually detected and estimated based on engine performance data represented by a well-known engine performance curve. On the other hand, the horsepower actually exerted by the engine is equivalent to the horsepower absorbed by the liquid transmission directly connected to this engine (hereinafter referred to as "absorption horsepower"), and therefore it can be obtained by measuring this absorption horsepower. This absorption horsepower is obtained by actually detecting the input shaft rotation speed and the output shaft rotation speed of the liquid transmission and based on the transmission performance data represented as a known transmission performance curve. It was

Further, in this performance evaluation device, the actual fuel injection amount in the engine is detected by the fuel injection command signal given from the fuel injection commander operated in the driver's cab or the fuel injection device. It was estimated based on one of the states. Therefore, it is not necessary to take the troublesome method of precisely measuring the amount of fuel discharged from the fuel injection pump or the amount of fuel returned to the fuel tank through the return pipe, and the performance of the engine can be easily verified. I was able to evaluate it.

[0005]

However, even with the above-mentioned conventional technique, it has been considered that the performance of the internal combustion engine cannot be accurately verified and evaluated depending on the conditions. In a normal operation state, the liquid transmission is cooled so as to satisfy a predetermined temperature condition, so that the transmission fluid temperature does not change abruptly. However, when the transmission input shaft is rotated in a region where the efficiency of the liquid transmission is not very good, most of the horsepower absorbed by the liquid transmission is not transmitted to the transmission output shaft, and the internal portion of the liquid transmission is Turns into heat. Particularly, in a so-called stall state in which the transmission output shaft is stopped, all of the absorbed horsepower (that is, engine output) is converted into heat inside the liquid transmission. In such a case, if the engine output is large, the transmission fluid temperature may rise rapidly.

When the transmission oil temperature changes significantly in this way, the transmission performance also changes significantly. for that reason,
In the above performance evaluation device, it is necessary to prepare the conditions that the liquid transmission does not cause a rapid temperature rise, and when there is a large change in the oil temperature, the accurate absorption horsepower cannot be measured and the performance of the engine cannot be measured. Could not be properly tested and evaluated.

Therefore, in the present invention, in verifying and evaluating the performance of an engine that directly drives a liquid transmission, even when the performance of the transmission changes due to a change in the oil temperature of the liquid transmission,
An object of the present invention is to provide a performance evaluation device capable of accurately obtaining the horsepower absorbed by a liquid transmission.

[0008]

Means for Solving the Problems and Actions The present invention, which has been made to achieve the above object, has the following features.
A performance evaluation device for an internal combustion engine, which displays the performance exhibited by the internal combustion engine based on the output or torque absorbed by a liquid transmission directly connected to the internal combustion engine, wherein the output or torque generated by the internal combustion engine can be varied. Engine performance storage means stored in advance according to the engine operation mode, engine performance detection means for detecting the output or torque from the engine performance storage means based on the actual engine operation mode, and the output absorbed by the liquid transmission. Alternatively, the torque is output from the transmission performance storage means based on the actual transmission operation mode and the actual transmission oil temperature, and the transmission performance storage means that stores the torque in advance in accordance with various transmission operation modes and the transmission oil temperature. Alternatively, a direct connection to the liquid transmission is made based on transmission performance detecting means for detecting torque, data detected by the engine performance detecting means, and characteristics of the liquid transmission. Based on the engine performance estimating means for estimating the output or torque to be generated in the internal combustion engine, the data detected by the transmission performance detecting means, and the actual engine speed in the internal combustion engine directly connected to the liquid transmission, The engine performance measuring means for measuring the output or torque actually generated in the internal combustion engine, the output or torque estimated by the engine performance estimating means, and the output or torque measured by the engine performance measuring means are displayed. And a display means.

According to the performance evaluation apparatus of the present invention having the above-described configuration, the output or torque that should be originally generated in the engine is determined by the engine performance storage means in various ways, for example, by combining the engine speed, the fuel injection amount and the like. It is stored in advance in association with the engine operation mode. Then, the engine performance detecting means detects the output or torque generated at that time according to the actual engine operating mode.

On the other hand, the output or torque absorbed in the liquid transmission is determined by the transmission performance storage means, for example, in various transmission operating modes and transmission oil temperatures determined by combining the input shaft rotation speed and the output shaft rotation speed. It is stored in advance in association with and. Then, the transmission performance detecting means detects the output or torque absorbed at that time according to the actual transmission operating mode and the actual transmission oil temperature.

In particular, the data stored in the transmission performance storage means corresponds to the variation of the transmission oil temperature, and the transmission performance detection means detects the data based on the actual transmission oil temperature. Even if the transmission oil temperature changes, the output or torque absorbed by the liquid transmission can be correctly obtained correspondingly.

The engine performance estimating means estimates the output or torque that should be originally generated in the engine based on the data detected by the engine performance detecting means. In the present invention, since the liquid transmission is directly connected to the engine, the engine rotation speed and the transmission input shaft rotation speed are always equal, and all the output or torque generated in the engine is absorbed by the liquid transmission. Therefore,
The output or torque that should be originally generated in this engine can be estimated to be at the matching point between the output characteristic of the engine and the input characteristic of the liquid transmission.

On the other hand, the actual engine speed (that is, the transmission input shaft speed) does not always match the value estimated by the engine performance estimating means, and the output or torque generated by the engine at that time is naturally also the above value. Does not match the estimated value. The engine performance measuring means measures the output or torque absorbed by the liquid transmission at the actually detected engine speed based on the data detected by the transmission performance detecting means. That is,
The engine performance measuring means measures the output or torque actually generated in the engine from the input characteristic of the liquid transmission and the actual input shaft rotation speed.

In this way, the output or torque estimated by the engine performance estimating means and the output or torque measured by the engine performance measuring means are displayed by a display means typified by a CRT, a printer, etc. By comparing the differences, the engine performance can be verified / evaluated.

The performance evaluation apparatus according to a second aspect of the present invention is based on the engine performance storage means that stores in advance the output or torque generated in the internal combustion engine according to various engine operation modes, and the actual engine operation mode. An engine performance detecting means for detecting an output or a torque from the engine performance storing means and an output or a torque absorbed by the liquid transmission are stored in advance in accordance with various transmission operating modes and transmission oil temperatures. Means, transmission performance detection means for detecting output or torque from the transmission performance storage means based on the actual transmission operating mode and the actual transmission oil temperature, data detected by the engine performance detection means, and An engine that estimates the output or torque that should be generated in the internal combustion engine at the engine speed based on the actual engine speed in the internal combustion engine to which the liquid transmission is directly connected The output or torque actually generated in the internal combustion engine is measured based on the performance estimation means, the data detected by the transmission performance detection means, and the actual engine speed of the internal combustion engine directly connected to the liquid transmission. The engine performance measuring means, the output or torque estimated by the engine performance estimating means, and the display means for displaying the output or torque measured by the engine performance measuring means.

According to the performance evaluation apparatus of the second aspect, the engine performance estimating means has a different configuration from the performance evaluation apparatus of the first aspect. That is, in the performance evaluation device according to claim 2, the engine performance estimating means is based on the engine speed actually detected by the engine performance estimating means and the output or torque to be generated by the engine and the data detected by the engine performance detecting means. presume.

That is, in the configuration according to claim 1, the output or torque that the engine should originally generate is estimated by matching the output characteristic of the engine and the input characteristic of the liquid transmission. In the configuration described in 2, the output or torque that the engine should originally generate is estimated based on the output characteristics of the engine and the engine speed. Even with such a configuration, the engine performance can be verified / evaluated by comparing the differences between the two.

As described above, the performance evaluation apparatus of the present invention having the above-described structure can output the output or torque absorbed by the transmission even when the transmission performance greatly changes due to the change of the transmission oil temperature. Can measure accurately. Therefore, in particular, as described in claim 3, the transmission performance storage means stores in advance the output or the torque absorbed by the liquid transmission while the rotation of the transmission output shaft is stopped, and the transmission is stored. The performance detecting means detects the output or the torque from the transmission performance storing means based only on the actual transmission oil temperature in the liquid transmission, and the liquid transmission in the state where the rotation of the transmission output shaft is stopped. The performance exhibited by the internal combustion engine may be displayed based on the output or torque absorbed by the engine.

According to the performance evaluation device thus constructed, the performance of the engine can be measured with the transmission output shaft stopped. Therefore, the engine performance can be verified / evaluated without running the vehicle. Further, the output or torque absorbed by the liquid transmission changes depending on the rotation speed of the transmission output shaft. In this case, since the transmission output shaft is stopped, the transmission performance storage means stores the rotation of the transmission output shaft. It is sufficient to store the data when the number is zero, and the storage capacity is reduced.
Further, the transmission performance detecting means does not need the transmission output shaft rotation speed in detecting the data, and the configuration of the detector or the like for detecting the output shaft rotation speed can be simplified.

In addition, in actually measuring the fuel injection amount, there is also a method of measuring the discharge amount of the fuel pump and the amount of fuel returned to the fuel tank through a so-called return pipe. When the device is controlled by the fuel injection amount command signal provided from the fuel injection amount indicator, the fuel injection amount command signal substantially determines the fuel injection amount and the engine operation mode.

Therefore, in such a case, as described in claim 4, data is stored in the engine performance storage means in accordance with the engine operation mode determined by the fuel injection amount command signal given to the fuel injection device. The engine performance detection means may be configured to detect data from the engine performance storage means according to a fuel injection amount command signal actually given to the fuel injection device.

In this way, the actual fuel injection amount can be estimated and detected to specify the engine operation mode without measuring the amount of fuel flowing through the pipe. Further, if the position of the rack or spill provided in the fuel injection device is detected by the sensor, the fuel injection amount is almost determined by the operating state,
The engine operation mode is also determined.

Therefore, according to a fifth aspect of the present invention, the engine performance storage means stores data according to an engine operation mode determined by an operating state detected from the fuel injection device, and the engine performance detection means stores the fuel. Data may be detected from the engine performance storage means according to the operating state actually detected from the injection device.

Also in the case of such a configuration, it is possible to detect the actual fuel injection amount by estimation and specify the engine operation mode without measuring the amount of fuel flowing through the pipe.

[0025]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention. A performance evaluation apparatus as an example transmits a reciprocating diesel engine 1 mounted on a railway vehicle, an input shaft 3 directly connected to the engine 1, and an output of the engine 1 to an external drive mechanism (not shown). A liquid transmission 2 having an output shaft 4 that operates, an input shaft rotation speed detector 5 that detects the rotation speed of the input shaft 3, an output shaft rotation speed detector 7 that detects the rotation speed of the output shaft 4, and a liquid transmission Based on the temperature sensor 30 for measuring the oil temperature of the machine 2 and the oil temperature signal 31 from the temperature sensor 30, the absorption horsepower of the liquid transmission 2 at the oil temperature is defined as data determined by the input / output shaft rotation speed, and the data is obtained. Transmission performance memory 3 that outputs
2, the input shaft rotation speed signal 6 and the output shaft rotation speed signal 8 are input, the absorption horsepower measuring device 9 for measuring the absorption horsepower of the liquid transmission 2 based on the data from the transmission performance memory 32, and the fuel injection The fuel injection device 10 for supplying the engine 1 with the amount of fuel instructed by the fuel injection amount command signal 13 from the amount command device 12, the fuel injection amount command signal 13, and the input shaft speed signal 6 are input and built-in. Based on the engine performance data stored in the memory, the engine output estimator 15 that estimates the horsepower that the engine 1 should originally exert, the engine output information 16 from the engine output estimator 15, and the absorption horsepower measuring device 9 The absorption horsepower information 17 is input and the display 18 displays both information in the form of a graph.

The fuel injection amount commanding device 12 is composed of a well-known main controller or the like in a driver's cab of a railway vehicle or the like. In this embodiment, the fuel injection amount commanding device 12 instructs the fuel injection device 10 to have five kinds of fuel injection amounts. You can When the fuel injection device 10 receives the fuel injection amount command signal 13 from the fuel injection amount command device 12, the fuel injection device 10 supplies the engine 1 with the amount of fuel according to the instruction, and the operation of the engine 1 is thereby performed. The output of the engine 1 is transmitted to the liquid transmission 2 via the input shaft 3 of the liquid transmission 2 via the propulsion shaft and the like, and further, the power and the rotational speed are converted and transmitted to the output shaft 4. To be done.

The engine output estimator 15 prestores the horsepower generated in the engine 1 in a built-in memory as data determined by the engine speed and the fuel injection amount. In addition, the engine output estimator 15 includes a fuel injection amount commander 1
The fuel injection amount command signal 13 from 2 and the input shaft speed signal 6 from the input shaft speed detector 5 are input. In this embodiment, since the engine 1 is directly connected to the liquid transmission 2, the input shaft speed signal 6 indicates the engine speed itself, and
The fuel injection amount is almost fixed according to the fuel injection amount command signal. Therefore, the engine output estimator 15 can detect the actual fuel injection amount in the engine 1 and the engine speed, and can estimate the horsepower that should be originally generated when the engine 1 is in the engine operation mode based on the detected value. it can.

The absorption horsepower measuring device 9 comprises a known pattern generator, etc., and has an input shaft rotational speed signal 6 from the input shaft rotational speed detector 5 and an output shaft rotational speed signal 8 from the output shaft rotational speed detector 7. Is input, and data from the transmission performance memory 32 is input. In the embodiment, the transmission performance memory 32 divides the transmission oil temperature between 30 ° C. and 90 ° C. into 10 equal parts, and the liquid transmission 2 in each oil temperature range.
The horsepower absorbed by is stored in advance as data determined according to the input / output shaft rotation speed, and based on the oil temperature signal 31 from the temperature sensor 30, only the data corresponding to the oil temperature is selectively generated.

Therefore, in the absorption horsepower measuring device 9, the data corresponding to the variation of the transmission oil temperature is always input, and the liquid transmission 2 is operated in the transmission operation mode based on the rotation speeds of the input shaft 3 and the output shaft 4. It is possible to measure the absorbed horsepower when there is. Since the engine 1 of this embodiment is directly connected to the liquid transmission 2, the absorption horsepower measured here is considered to be equivalent to the engine output actually generated in the internal combustion engine.

When the performance of the transmission greatly changes due to a change in the transmission oil temperature, the temperature range divided into 10 equal parts may be further subdivided. On the contrary, if the performance of the transmission does not change significantly, it may be divided into three equal parts. Further, the range of 30 ° C. to 90 ° C. may be appropriately set according to the performance of the transmission.

The display 18 inputs the engine output information 16 from the engine output estimator 15 and the absorption horsepower information 17 from the absorption horsepower measuring device 9 and combines both information in a form as shown in FIG. indicate. In the figure, the horizontal axis represents the engine speed (that is, the input shaft speed), and the vertical axis represents the horsepower. The engine output information 16 is information representing the horsepower that the engine 1 should originally generate, and the horsepower that should be generated in the actually detected fuel injection amount has the engine speed as a parameter represented by the performance curve R in FIG. 2 as a parameter. The engine 1 has an engine speed N
It is understood that the horsepower P1 should normally be generated since the vehicle is driven at. On the other hand, the absorbed horsepower information 17 is information indicating the horsepower absorbed by the liquid transmission 2, and the horsepower absorbed at the actually detected transmission oil temperature and output shaft speed is represented by the performance curve S in FIG. It can be seen that the liquid transmission 2 absorbs the horsepower P2 when the engine 1 is operated at the engine speed N, which is represented by a curve using the input shaft speed as a parameter.

If such information is displayed, both horsepower P
The difference between 1 and P2 can be easily examined. For example, if there is almost no difference, the engine performance can be evaluated as good, and conversely, if there is an extreme difference, it can be determined that the engine has some abnormality.
In this embodiment, the engine output information 16 and the absorption horsepower information 17 are graphed and the performance curves R and S with the engine speed (input shaft speed) as a parameter are also displayed. Only the horsepower P1, P2 at the engine speed N may be simply displayed as a numerical value, or a graph and a numerical value may be displayed together.

In the performance evaluation apparatus described above, the actual engine speed is detected and the horsepower to be generated by the engine 1 at that engine speed is estimated to be the horsepower that should be originally generated in the engine 1. The horsepower that should be originally generated in the engine 1 is a standard for evaluating the performance of the engine 1, and other ways of taking this standard can be considered.

More specifically, since the liquid transmission 2 is directly connected to the engine 1, the engine rotation speed and the input shaft rotation speed are always the same, and the horsepower generated in the engine 1 is all the liquid transmission. Can be considered to be absorbed by 2. From this premise, the engine 1 is operated with a predetermined fuel injection amount,
When the liquid transmission 2 is driven at a predetermined transmission oil temperature and an output shaft rotational speed, the horsepower that the engine 1 should originally generate is equal to the engine rotational speed (that is, the input shaft rotational speed) and the horsepower. It can be considered that it should be the horsepower P3 at the intersection of the curves R and S at the point where the curves R and S shown in FIG. 3 (the performance curve itself is the same as that of FIG. 2).

When displaying such information, instead of inputting the input shaft speed signal 6 from the input shaft speed detector 5, the engine output estimator 15 detects the output shaft speed. The output shaft speed signal 8 from the gearbox 7 and the data from the transmission performance memory 32 are input, and a point where the engine speed and the input shaft speed match the engine output and the absorption horsepower is searched for, and the engine speed is searched for. The output information 16 is output. Even with such information displayed, the performance of the engine can be verified / evaluated based on the difference between the horsepower P2 and P3.

By the way, in the above embodiment, it is the fuel injection amount command signal that is output to the engine from the fuel injection amount command device 12, which is the main controller of the vehicle. But,
When the engine uses the full speed governor, it is the rotation speed command signal that is output from the master controller of the vehicle to the engine 1. The fuel injection amount of the engine cannot be estimated from such a rotation speed command signal. In such a case, part of the configuration shown in FIG. 1 may be configured as shown in FIG. In addition,
In the figure, only a part to be replaced is shown, and the same symbols as in FIG. 1 have the same configuration.

The engine speed commander 21, which is a master controller of the vehicle, outputs engine speed command information 22. The engine speed command information 22 is supplied to the fuel injection device 23 with a full speed governor.
Enter The full-speed governor-equipped fuel injection device 23 supplies the engine 1 with fuel sufficient to maintain the engine speed instructed by the engine speed command information 22 in accordance with the load of the engine 1 and the engine speed.
It is a well-known device for supplying to. An operation detector 11, which is a position sensor for detecting the position of a so-called fuel rack or spill, is attached to the fuel injection device 23, and the fuel supplied to the engine 1 by the fuel injection device 23 in the operation state. To detect. The operation information 14 of the fuel injection device thus obtained is input to the engine output estimator 15. The data stored in the engine output estimator 15 is used as the fuel injection device 2
The engine output estimator 15 outputs the same engine output information 16 as that of the above-described embodiment, which corresponds to the fuel injection amount determined by the operating state detected from No. 3. Therefore, in the following, the output that the engine 1 should originally exhibit and the horsepower actually output by the engine are displayed in the same manner as described above, and the performance of the engine can be verified and evaluated from the difference.

As described above, in all the performance evaluation devices of this embodiment, the output of the engine 1 is measured by the horsepower absorbed by the liquid transmission 2 directly connected to the engine 1, and the measured performance and the original performance are measured. It is displayed so that it can be easily compared and considered with the desired performance. The horsepower absorbed by the liquid transmission 2 changes as the oil temperature of the liquid transmission 2 changes, but in the present embodiment,
Since the transmission performance memory 32 detects the data corresponding to the oil temperature detected by the temperature sensor 30, the absorbed horsepower can be correctly measured even if the transmission oil temperature changes.

Therefore, with the performance evaluation apparatus of this embodiment, it is possible to perform performance measurement with the output shaft 4 in a stopped state (so-called stall state). In this case, the rotation speed of the output shaft 4 of the liquid transmission 2 does not have to be measured, and the performance evaluation can be performed by simply measuring the rotation speed of the input shaft 3. Therefore, the configuration for detecting the output shaft speed is not necessary, and the transmission performance data stored in the memory is limited to the case where the output shaft speed is zero, and the storage capacity can be reduced.

Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various embodiments can be adopted without departing from the scope of the present invention. For example, in the above-mentioned embodiment, the output of the engine is referred to as so-called horsepower (power).
An example of performing performance verification / evaluation by measuring in Section 2 was described. However, the output of the engine may be evaluated by torque,
Even in that case, the configuration and the configuration based on the torque can be used for the configuration and the configuration exactly the same as those shown in the embodiment.

[0041]

As described above, according to the performance evaluation apparatus of the present invention, even if the transmission performance changes in various ways due to the change of the transmission oil temperature, the engine performance can be accurately adjusted accordingly. It can be measured and the performance can be verified and evaluated correctly.

Particularly, according to the performance evaluation apparatus of the third aspect, the structure is simplified, and the engine performance can be verified and evaluated without running the vehicle, which is convenient. Further, according to the performance evaluation device of claims 4 and 5, the performance of the engine can be improved without performing the troublesome work such as measuring the amount of fuel returned from the return pipe of the engine to the fuel tank. Can be tested and evaluated.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a graph showing an example of a display format of engine performance.

FIG. 3 is a graph showing an example of another display format of engine performance.

FIG. 4 is a block diagram showing a main part of another embodiment of the present invention.

[Explanation of symbols]

1 ... Engine, 2 ... Liquid transmission, 3 ... Input shaft,
4 ... Output shaft, 5 ... Input shaft speed detector, 7 ...
・ Output shaft rotation speed detector, 9 ... Absorption horsepower measuring device, 1
0,23 ... Fuel injection device, 11 ... Operation detector,
12 ... Fuel injection amount command device, 15 ... Engine output estimator, 18 ... Display device, 21 ... Engine speed command device,
30 ... Temperature sensor, 32 ... Transmission performance memory.

─────────────────────────────────────────────────── ─── Continuation of the front page (73) Patent holder 303025663 Hitachi Niko Transmission Co., Ltd. 1-405, 1-chome, Yoshino-cho, Kita-ku, Saitama-shi, Saitama 3 (72) Inventor Kazumi Sotoyama 1-chome, Mei-eki, Nakamura-ku, Aichi No. 1-4 Tokai Passenger Railway Co., Ltd. (72) Inventor Yoji Hayakawa 1-4-1, Mei Station, Nakamura-ku, Aichi Prefecture Nagoya City Tokai Passenger Railway Co., Ltd. (72) Inventor Yoshihiro Tamakoshi Nakamura-ku, Nagoya, Aichi Prefecture Meieki 1-4-1 Tokai Passenger Railway Co., Ltd. (72) Inventor Kazuhiko Nagase 7-1 Ogigaoka, Nonoichi-cho, Ishikawa-gun Ishikawa Prefecture Kanazawa Institute of Technology Mechanical Engineering (56) Reference JP 60- 57233 (JP, A) JP 4-291128 (JP, A) JP 63-273036 (JP, A) Actually opened 64-14560 (JP, U) JP 39-9101 ( (58) Fields surveyed (Int.Cl. ⁷ , DB name) G01M 15/00 F02B 77/08 F02D 45/00 364 G01L 3/24

Claims (5)

(57) [Claims] 1. A performance evaluation device for an internal combustion engine, which displays the performance exhibited by the internal combustion engine based on the output or torque absorbed by a liquid transmission directly connected to the internal combustion engine, the output being generated by the internal combustion engine. Alternatively, the torque is stored in advance in accordance with the engine operation mode, the engine performance storage means, the engine performance detection means for detecting the output or the torque from the engine performance storage means based on the actual engine operation mode, and the liquid transmission are absorbed. The output or torque to be output is stored in advance in accordance with the transmission operation mode and the transmission oil temperature, and the transmission performance storage means is based on the actual transmission operation mode and the actual transmission oil temperature. Transmission performance detection means for detecting output or torque, and based on data detected by the engine performance detection means, should be generated in an internal combustion engine directly connected to the liquid transmission Based on the engine performance estimating means for estimating the force or torque, the data detected by the transmission performance detecting means, and the actual engine speed of the internal combustion engine directly connected to the liquid transmission, The engine performance measuring means for measuring the generated output or torque, the output or torque estimated by the engine performance estimating means, and the display means for displaying the output or torque measured by the engine performance measuring means are provided. A performance evaluation device for an internal combustion engine, characterized in that 2. A performance evaluation device for an internal combustion engine, which displays the performance exhibited by the internal combustion engine based on the output or torque absorbed by a liquid transmission directly connected to the internal combustion engine, the output being generated by the internal combustion engine. Alternatively, the torque is stored in advance in accordance with the engine operation mode, the engine performance storage means, the engine performance detection means for detecting the output or the torque from the engine performance storage means based on the actual engine operation mode, and the liquid transmission are absorbed. The output or torque to be output is stored in advance in accordance with the transmission operation mode and the transmission oil temperature, and the transmission performance storage means is based on the actual transmission operation mode and the actual transmission oil temperature. Transmission performance detection means for detecting output or torque, data detected by the engine performance detection means, and actual data of the internal combustion engine to which the liquid transmission is directly connected An engine performance estimating means for estimating an output or a torque to be generated in the internal combustion engine at the engine speed based on the engine speed, data detected by the transmission performance detecting means, and a direct connection to the liquid transmission. Based on the actual engine speed in the internal combustion engine, engine performance measuring means for measuring the output or torque actually generated in the internal combustion engine, the output or torque estimated by the engine performance estimating means, and the engine performance A performance evaluation device for an internal combustion engine, comprising: a display unit that displays the output or torque measured by the measurement unit. 3. The internal combustion engine performance evaluation apparatus according to claim 1, wherein the transmission performance storage means is absorbed by the liquid transmission while the rotation of the transmission output shaft is stopped. Output or torque is stored in advance, the transmission performance detection means detects the output or torque from the transmission performance storage means based only on the actual transmission oil temperature in the liquid transmission, and the transmission output shaft The performance evaluation device for an internal combustion engine, wherein the performance exhibited by the internal combustion engine is displayed based on the output or the torque absorbed by the liquid transmission while the rotation of the internal combustion engine is stopped. 4. The performance evaluation device according to any one of claims 1 to 3, wherein the engine performance storage means stores an engine operation mode determined by a fuel injection amount command signal given to the fuel injection device. Data is stored, and the engine performance detection means detects the data from the engine performance storage means in accordance with a fuel injection amount command signal actually given to the fuel injection device. apparatus. 5. The performance evaluation device according to claim 1, wherein the engine performance storage means stores data according to an engine operating mode determined by an operating state detected from the fuel injection device. The performance evaluation device for an internal combustion engine, wherein the engine performance detection means stores data in the engine performance storage means according to an operating state actually detected from the fuel injection device.