JP5602611B2 - Acceleration / deceleration degree display device - Google Patents

Description

  The present invention relates to an acceleration / deceleration degree display device.

  Conventionally, a neutral inertial traveling device (ESCOT ROLL) that suppresses deceleration of the vehicle during inertial traveling (when the accelerator pedal is not depressed) and reduces fuel consumption during reacceleration by disconnecting the engine and the drive line. ) Is known.

“Quon DUMP / MIXER” catalog UD Trucks Co., Ltd. 2010 issue Page 16

  When using the above neutral coasting device, the engine always injects fuel during coasting to maintain idle rotation. For this reason, under some circumstances, the fuel efficiency may be improved without using the neutral coasting apparatus.

  Therefore, the present invention provides a means for the driver to easily grasp the fuel consumption when using the neutral inertial traveling device and the situation to be compared.

  The acceleration / deceleration degree display device according to one aspect is mounted on a vehicle including a neutral inertia traveling device that disconnects an engine and a drive line. The acceleration / deceleration degree display device according to one aspect includes an acquisition unit, a first storage unit, a second storage unit, a first estimation unit, a second estimation unit, and a display unit. The acquisition means acquires parameters including vehicle information including at least an accelerator opening, an engine speed, and a gear, road gradient information, and vehicle weight information. A 1st memory | storage means memorize | stores the 1st information which shows the correspondence of the degree of the acceleration / deceleration of a vehicle at the time of use of a neutral inertial traveling apparatus, and a parameter. The second storage means stores second information indicating a correspondence relationship between the degree of acceleration / deceleration of the vehicle and the parameter when the neutral inertia traveling device is not used. The first estimating means obtains the degree of the first acceleration / deceleration corresponding to the current parameter with reference to the first information. The second estimating means obtains the degree of the second acceleration / deceleration corresponding to the current parameter with reference to the second information. The display means displays the first acceleration / deceleration degree and the second acceleration / deceleration degree in a comparable manner.

  The acceleration / deceleration degree display device according to another aspect is mounted on a vehicle including a neutral inertia traveling device that disconnects the engine and the drive line, and an exhaust brake. The acceleration / deceleration degree display device according to another aspect includes an acquisition unit, a first storage unit, a second storage unit, a first estimation unit, a second estimation unit, and a display unit. The acquisition means acquires parameters including vehicle information including at least an accelerator opening, an engine speed, and a gear, road gradient information, and vehicle weight information. A 1st memory | storage means memorize | stores the 1st information which shows the correspondence of the degree of the acceleration / deceleration of a vehicle at the time of use of a neutral inertial traveling apparatus, and a parameter. The second storage means stores second information indicating a correspondence relationship between the degree of acceleration / deceleration of the vehicle and the parameters when the exhaust brake is used. The first estimating means obtains the degree of the first acceleration / deceleration corresponding to the current parameter with reference to the first information. The second estimating means obtains the degree of the second acceleration / deceleration corresponding to the current parameter with reference to the second information. The display means displays the first acceleration / deceleration degree and the second acceleration / deceleration degree in a comparable manner.

  In the one aspect or the other aspect described above, the first estimation unit and the second estimation unit correct the first acceleration / deceleration rate and the second acceleration / deceleration rate, respectively, when there is a parameter variation. May be. The display means may update the display according to the correction result.

  According to the present invention, the degree of acceleration / deceleration during use of the neutral inertial traveling device and the degree of acceleration / deceleration in a situation to be compared are estimated and displayed for comparison. As a result, the driver can easily determine the fuel consumption when using the neutral inertia traveling device and the situation to be compared.

Block diagram of the first embodiment Flow chart of the first embodiment The figure showing the image of the indicator in 1st Embodiment (A): The figure which shows the example of the travel distance when the acceleration / deceleration is repeated using the neutral inertia traveling device and the case where the vehicle travels at a constant speed, (b): The fuel consumption in the example of FIG. 4 (a) Figure showing an example Flowchart of the second embodiment The figure showing the image of the indicator in 2nd Embodiment FIG. 7A is a diagram showing an example of a travel distance when the vehicle is decelerated using a neutral inertia traveling device and when the vehicle is decelerated with the accelerator OFF after the cruise with the exhaust brake set to the 0 position, and FIG. 7B. ) Example of fuel consumption in the example

<Description of First Embodiment>
FIG. 1 is a block diagram illustrating a configuration example of an acceleration / deceleration degree display device according to the first embodiment. The acceleration / deceleration degree display device according to the first embodiment is mounted on a vehicle equipped with a neutral inertia traveling device (ESCOT ROLL).

  Here, the neutral coasting device (ESCOT ROLL) is a device that suppresses deceleration of the vehicle during coasting by disconnecting the engine and the drive line. When the neutral inertial traveling device is used, the engine brake is cut off, so that the speed reduction of the vehicle during inertial traveling is suppressed. For example, when driving from coasting to return to a predetermined speed by depressing the accelerator pedal, the fuel required for re-acceleration is reduced when the neutral coasting device is used compared to when it is not used. It leads to driving.

  The acceleration / deceleration degree display device 1 according to the first embodiment shown in FIG. 1 includes a control unit 10, an accelerator opening sensor 11, a gear stage sensor 12, an engine rotation sensor 13, a weight information acquisition unit 14, and a gradient. A sensor 15, a vehicle speed sensor 16, a storage unit 17, and a display unit 18 are provided. The control unit 10 is connected to the accelerator opening sensor 11, gear stage sensor 12, engine rotation sensor 13, weight information acquisition unit 14, gradient sensor 15, vehicle speed sensor 16, database 17, and display unit 18. .

  The control unit 10 reads information input from the accelerator opening sensor 11, the gear position sensor 12, the engine rotation sensor 13, the weight information acquisition unit 14, the gradient sensor 15, and the vehicle speed sensor 16. The control unit 10 in the first embodiment estimates the degree of acceleration / deceleration between when the neutral inertial traveling device is used and when it is not used with reference to information in a database described later stored in the storage unit 17.

  The accelerator opening sensor 11 detects the accelerator opening of the vehicle in real time, and outputs information on the detected accelerator opening to the control unit 10. As an example, the information on the accelerator opening may indicate the current degree of opening of the accelerator as a percentage based on a state where the accelerator is fully opened.

  The gear stage sensor 12 detects the gear stage of the vehicle in real time, and outputs information (gear stage information) indicating the position of the detected gear stage to the control unit 10.

  The engine speed sensor 13 detects the engine speed of the vehicle in real time and outputs information on the detected engine speed to the control unit 10.

  The weight information acquisition unit 14 acquires vehicle weight information and outputs the acquired vehicle weight information to the control unit 10.

  For example, the weight information acquisition unit 14 may include a weight sensor that detects the weight of the load. In this case, the weight information acquisition unit 14 may detect the weight of the load of the vehicle with a weight sensor, and add the weight of the load to the known weight of the vehicle body to calculate the weight of the entire vehicle. Moreover, the weight information acquisition part 14 may calculate the weight of the whole vehicle using the engine output and acceleration of a vehicle. Moreover, the weight information acquisition part 14 may determine the weight of the whole vehicle according to a driver | operator's input.

  The gradient sensor 15 detects the degree of gradient of the road on which the vehicle is traveling in real time, and outputs the detected gradient information of the road to the control unit 10. For example, the gradient sensor 15 may indicate the gradient of the road that is running as a percentage.

  The vehicle speed sensor 16 detects the speed of the vehicle in real time and outputs information on the detected vehicle speed to the control unit 10.

  The storage unit 17 is a nonvolatile storage medium that stores the first database and the second database. A 1st database is used when estimating the acceleration / deceleration at the time of use of a neutral inertial traveling apparatus. The second database is used when estimating the acceleration / deceleration when the neutral inertia traveling device is not used. Each database is a data table in a matrix format showing the correspondence between accelerator opening, gear stage, engine speed, weight, gradient, vehicle speed parameters, and vehicle acceleration / deceleration by a combination of the above parameters.

  Here, the acceleration / deceleration can be calculated by an equation of motion using the above parameters, the air resistance applied to the vehicle, the friction resistance between the vehicle and the road surface, the resistance of the engine, and the like. For example, experimental data is acquired in advance for air resistance applied to the vehicle, friction resistance between the vehicle and the road surface, engine resistance, and the like. And a 1st database and a 2nd database can be produced | generated by calculating | requiring acceleration / deceleration for every combination of each parameter using those values and an equation of motion. In the above, air resistance, friction resistance, and the like may be corrected as needed based on the predicted acceleration / deceleration value and the actual measurement value. When the neutral inertia traveling device is used, the engine and the drive line are disconnected. Therefore, when the acceleration / deceleration at the time of use of the neutral inertia traveling device is obtained, for example, the value of the engine resistance or the like may be appropriately changed in the above.

  The display unit 18 compares and displays the estimated degree of acceleration / deceleration when the neutral inertial traveling device is used / not used under the control of the control unit 10 (see FIG. 3). The display unit 18 is configured by a known display device such as an indicator panel or a liquid crystal monitor, for example.

  The operation example of the first embodiment will be described below using the flowchart of FIG. The process of the flowchart of FIG. 2 is started by the control unit 10 in response to the start of an engine (not shown). The control unit 10 activates the accelerator opening sensor 11, the gear stage sensor 12, the engine rotation sensor 13, the gradient sensor 15, and the vehicle speed sensor 16 prior to the processing of the flowchart of FIG.

  Step S1: The control unit 10 acquires parameters from the accelerator opening sensor 11, the gear stage sensor 12, the engine rotation sensor 13, the weight information acquisition unit 14, the gradient sensor 15, and the vehicle speed sensor 16, respectively.

  As an example, it is assumed that the control unit 10 acquires information that the current parameter is 50% accelerator opening, 5 gear stages, 5000 engine revolutions, 5 tons in weight, + 5% gradient, and vehicle speed 50 km / h.

  Step S2: The control unit 10 refers to the first database in the storage unit 17, and uses the current parameter (S1) to determine the degree of acceleration / deceleration (first acceleration / deceleration) when using the neutral inertia traveling device. presume. Specifically, the control unit 10 may acquire the acceleration / deceleration corresponding to the current parameter with reference to the first database. Note that the first database in the first embodiment outputs “+5” as the indexed acceleration / deceleration value in response to the input of the parameter of S1.

  Step S3: The control unit 10 refers to the second database in the storage unit 17 and uses the current parameter (S1) for the degree of acceleration / deceleration when the neutral inertial traveling device is not used (second acceleration / deceleration degree). To estimate. Specifically, the control unit 10 may acquire the acceleration / deceleration corresponding to the current parameter with reference to the second database. Note that the second database in the first embodiment outputs “−5” as the indexed acceleration / deceleration value for the input of the parameter of S1.

  Step S4: The control unit 10 displays the first acceleration / deceleration degree (S2) on the display unit 18 in comparison with the second acceleration / deceleration degree (S3). Note that the display mode on the display unit 18 is not limited as long as the degree of acceleration / deceleration at the time of use / non-use of the neutral inertia traveling device can be compared. For example, an indicator, a number, a character, or the like may be used.

  FIG. 3 shows a display example of the display unit 18 in the first embodiment. FIG. 3 shows an example in which the degree of acceleration / deceleration is compared and displayed using 10 stages of indicators. In the example of FIG. 3, the degree of acceleration / deceleration when the neutral inertia traveling device is used is shown on the left side, and the degree of acceleration / deceleration when the neutral inertia traveling device is not used is shown on the right side. In the example of FIG. 3, the upper indicator (for five steps) is lit when accelerating, and the lower indicator (for five steps) is lit when decelerating. (Indicated by hatching). In addition, the number of indicators that are lit increases or decreases according to the degree of acceleration / deceleration.

  The display unit 18 in FIG. 3 shows the first acceleration / deceleration degree (+5) described in S2 and the second acceleration / deceleration degree (−5) described in S3. According to the display of FIG. 3, it can be seen that the vehicle accelerates when the neutral coasting apparatus is used, and the vehicle decelerates when it is not used. For example, in a situation where it is desired to accelerate the vehicle, the driver can determine that it is more appropriate to use the neutral inertia traveling device than not to use the neutral inertia traveling device.

  Step S5: The control unit 10 determines whether or not the engine has stopped. When the engine is stopped (YES side), the process of the flowchart in FIG. On the other hand, if the engine has not stopped (NO side), the control unit 10 returns to step S1 and repeats the above operation.

  Thereafter, the control unit 10 acquires the parameters again by a loop from S5 to S1. Then, the control unit 10 estimates the first acceleration / deceleration degree and the second acceleration / deceleration degree based on the new parameters, and updates the display on the display unit 18. Thereby, when there is a parameter variation, the first acceleration / deceleration degree and the second acceleration / deceleration degree are corrected, and the correction results are sequentially displayed on the display unit. Therefore, the driver can appropriately determine whether to use or not use the neutral inertia traveling device according to changes in the driving situation.

  Hereinafter, the operation and effect of the first embodiment will be described.

  FIG. 4A is a diagram showing an example of the travel distance when the acceleration / deceleration is repeated using the neutral inertia traveling device and when the vehicle travels at a constant speed. In FIG. 4A, the vertical axis represents the vehicle speed [km / h], and the horizontal axis represents the vehicle travel distance [km]. FIG. 4B is a diagram showing an example of fuel consumption in the example of FIG. In FIG. 4B, the vertical axis represents the consumed fuel [L], and the horizontal axis represents the travel distance [km] of the vehicle. In addition, in each figure of FIG. 4, the vehicle which repeats acceleration / deceleration using the neutral inertial traveling device is indicated by “A”, and the vehicle which travels at a constant speed without using the neutral inertial traveling device is indicated by “B”. ing.

  As described above, when the neutral inertia traveling device is used, the engine brake is shut off during inertia traveling with the accelerator closed, and the speed reduction during inertia traveling is suppressed.

  In the example of FIG. 4, it can be seen that when the vehicle arrives at the destination at the same time and the vehicle is not decelerated, the use of the neutral coasting apparatus consumes less fuel.

  However, when the neutral coasting device is used, the engine maintains idle rotation to prevent engine stall and consumes fuel. For this reason, under some circumstances, the use of a neutral coasting device may worsen the fuel consumption.

  For example, when it is desired to accelerate on a downhill, the vehicle is accelerated when the neutral inertial traveling device is used. Therefore, the fuel efficiency is improved by using the neutral inertial traveling device. On the other hand, when the vehicle is decelerated under the same situation, it is necessary to decelerate with a brake or the like. If the neutral inertial traveling device is used under the above-described circumstances, the idle speed of the engine is maintained, so that the fuel efficiency is deteriorated. In reality, it is very difficult for the driver to determine whether the neutral inertial traveling device is used or not during traveling.

  In the acceleration / deceleration degree display device of the first embodiment, the first acceleration / deceleration degree and the second acceleration / deceleration degree are displayed in a comparable manner, so that the neutral inertia traveling device is used and not used. The driver can easily determine which of the fuel economy is better.

<Description of Second Embodiment>
Next, as a second embodiment, a description will be given of an acceleration / deceleration degree display device in the case of comparatively displaying the acceleration / deceleration degrees when using a neutral inertia traveling device and when using an exhaust brake. The second embodiment is premised on being installed in a vehicle including a neutral inertia traveling device and an exhaust brake. The exhaust brake is a kind of auxiliary brake mainly used for trucks and buses having a total vehicle weight of 3.5 t or more. The principle of the braking force acting on the vehicle in the exhaust brake is the same as that of the engine brake, and uses the rotational resistance of the engine.

  Here, the acceleration / deceleration degree display device of the second embodiment has the same basic configuration as that of the first embodiment (FIG. 1). Therefore, in the description of the second embodiment, illustration of the device configuration is omitted, and differences from the first embodiment will be described.

  The storage unit 17 of the second embodiment includes a first database used when estimating the acceleration / deceleration during use of the neutral inertia traveling device, and a second database used when estimating the acceleration / deceleration during use of the exhaust brake. Is remembered.

  Here, the first database in the second embodiment is common to that in the first embodiment. On the other hand, the second database in the second embodiment shows the correspondence between accelerator opening, gear stage, engine speed, weight, gradient, vehicle speed parameters, and vehicle acceleration / deceleration by a combination of the above parameters. It is a data table in a matrix format. The second database in the second embodiment obtains acceleration / deceleration when the exhaust brake is at the 0 position. The second database is generated by the method described in the first embodiment. In the case of using the exhaust brake, for example, a database value when using the exhaust brake may be used.

  Further, the display unit 18 controls the control unit 10 to display the estimated degree of acceleration / deceleration between the neutral coasting apparatus and the exhaust brake (see FIG. 6).

  Hereinafter, an operation example of the second embodiment will be described with reference to the flowchart of FIG. Note that, in the operation example in the second embodiment, the description overlapping that in the first embodiment is omitted.

  Step S11: The control unit 10 acquires parameters from the accelerator opening sensor 11, the gear stage sensor 12, the engine rotation sensor 13, the weight information acquisition unit 14, the gradient sensor 15, and the vehicle speed sensor 16, respectively.

  Step S12: The control unit 10 refers to the first database in the storage unit 17, and uses the current parameter (S11) to determine the degree of acceleration / deceleration (first acceleration / deceleration) when the neutral inertia traveling device is used. presume.

  Step S13: The control unit 10 refers to the second database in the storage unit 17 and uses the current parameter (S11) for the degree of acceleration / deceleration (second acceleration / deceleration) when the exhaust brake (0 position) is used. To estimate.

  Step S14: The control unit 10 causes the display unit 18 to display the first acceleration / deceleration degree (S12) and the second acceleration / deceleration degree (S13) in comparison.

  FIG. 6 shows a display example of the display unit 18 in the second embodiment. The example of FIG. 6 is common to FIG. 3 except that the degree of acceleration / deceleration when the exhaust brake (0 position) is used is displayed on the right side of the figure.

  The display unit 18 in FIG. 6 shows the first acceleration / deceleration degree (+5) and the second acceleration / deceleration degree (−5). According to the display of FIG. 6, it can be seen that the vehicle is accelerated when the neutral inertia traveling device is used, and the vehicle is decelerated when the zero-position exhaust brake is used. For example, in a situation where the vehicle is desired to be decelerated, the driver can determine that it is more appropriate to use the exhaust brake than to use the neutral inertia traveling device.

  Step S15: The control unit 10 determines whether or not the engine has stopped. When the engine is stopped (YES side), the process of the flowchart of FIG. On the other hand, if the engine has not stopped (NO side), the control unit 10 returns to step S11 and repeats the above operation.

  Thereafter, the control unit 10 obtains the parameters again through a loop from S15 to S11. Then, the control unit 10 estimates the first acceleration / deceleration degree and the second acceleration / deceleration degree based on the new parameters, and updates the display on the display unit 18. Thereby, when there is a parameter variation, the first acceleration / deceleration degree and the second acceleration / deceleration degree are corrected, and the correction results are sequentially displayed on the display unit. Therefore, the driver can appropriately determine whether to use the neutral inertia traveling device or the exhaust brake according to changes in the driving situation.

  Hereinafter, the function and effect of the second embodiment will be described.

  FIG. 7A is a diagram showing an example of the travel distance when the vehicle is decelerated using the neutral inertia traveling device and when the vehicle is decelerated with the accelerator OFF after the cruise with the exhaust brake set to the 0 position. In FIG. 7A, the vertical axis represents the vehicle speed [km / h], and the horizontal axis represents the vehicle travel distance [km]. Moreover, FIG.7 (b) is a figure which shows the example of the fuel consumption in the example of Fig.7 (a). In FIG. 7B, the vertical axis represents the consumed fuel [L], and the horizontal axis represents the travel distance [km] of the vehicle. In addition, in each figure of FIG. 7, the vehicle which decelerates using a neutral inertial traveling apparatus is shown by "A", and the vehicle which decelerates by an exhaust brake is shown by "B".

  As described above, when the neutral inertia traveling device is used, the engine brake is shut off during inertia traveling with the accelerator closed, and the speed reduction during inertia traveling is suppressed.

  In the example of FIG. 7, when the vehicle A is attached to the destination at the same time, the vehicle A has a vehicle speed X [km / h] and the vehicle B has a vehicle speed Y [km / h] and XY [km / h]. There is a difference in vehicle speed, and the vehicle A consumes more fuel. When the vehicle is stopped by stepping on the brake from this state, the vehicle A wastes fuel. On the other hand, when accelerating again from this state, the vehicle B needs to be accelerated by XY [km / h] more, and fuel for that amount is additionally required.

  In the case of FIG. 7, when it is desired to accelerate, the use of a neutral inertia traveling device improves the fuel efficiency. However, if it is desired to decelerate under the same situation, the fuel efficiency is worsened by the use of the neutral inertia traveling device by maintaining the idle rotation. In reality, it is very difficult for the driver to judge the situation between the use of the neutral inertia traveling device and the use of the exhaust brake during traveling.

  In the acceleration / deceleration degree display device of the second embodiment, the first acceleration / deceleration degree and the second acceleration / deceleration degree are displayed so as to be comparable, so that the neutral inertia traveling device is used and the exhaust brake is used. In this case, the driver can easily determine which one has better fuel efficiency.

<Supplementary items of the embodiment>
(A) The acceleration / deceleration degree display device of the present invention displays the degree of acceleration / deceleration when the neutral inertia traveling device is used / not used and the degree of acceleration / deceleration when the exhaust brake is used so that they can be compared simultaneously. It may be.

  (B) In the above-described embodiment, the example using the data table indicating the correspondence between each parameter and the acceleration / deceleration has been described. However, the acceleration / deceleration degree display device according to the present invention may obtain the acceleration / deceleration by an arithmetic expression using each parameter.

  (C) In the second embodiment, the degree of acceleration / deceleration at the time of using the neutral inertia traveling device and the exhaust brake at the 0 position is compared, but the present invention is not limited to this. For example, when there are a plurality of exhaust brake positions, the control unit 10 may obtain the degree of acceleration / deceleration for each exhaust brake position.

  From the above detailed description, features and advantages of the embodiments will become apparent. It is intended that the scope of the claims extend to the features and advantages of the embodiments as described above without departing from the spirit and scope of the right. Further, any person having ordinary knowledge in the technical field should be able to easily come up with any improvements and modifications, and there is no intention to limit the scope of the embodiments having the invention to those described above. It is also possible to use appropriate improvements and equivalents within the scope disclosed in.

DESCRIPTION OF SYMBOLS 1 ... Acceleration / deceleration degree display apparatus, 10 ... Control unit, 11 ... Accelerator opening degree sensor, 12 ... Gear speed sensor, 13 ... Engine rotation sensor, 14 ... Weight information acquisition part, 15 ... Gradient sensor, 16 ... Vehicle speed sensor, 17 ... Storage unit, 18 ... Display unit

Claims (3)

An acceleration / deceleration degree display device mounted on a vehicle equipped with a neutral inertial traveling device that disconnects an engine and a drive line,
An acquisition means for acquiring parameters including vehicle information including at least an accelerator opening, an engine speed, and a gear, road gradient information, and vehicle weight information;
First storage means for storing first information indicating a correspondence relationship between the degree of acceleration / deceleration of the vehicle and the parameter when the neutral inertial traveling device is used;
Second storage means for storing second information indicating a correspondence relationship between the degree of acceleration / deceleration of the vehicle and the parameter when the neutral inertial traveling device is not used;
First estimation means for obtaining a first degree of acceleration / deceleration corresponding to the current parameter with reference to the first information;
Second estimation means for obtaining a second degree of acceleration / deceleration corresponding to the current parameter with reference to the second information;
An acceleration / deceleration degree display device comprising: display means for displaying the degree of the first acceleration / deceleration and the degree of the second acceleration / deceleration in a comparable manner. An acceleration / deceleration degree display device mounted on a vehicle equipped with a neutral inertia traveling device that cuts off an engine and a drive line and an exhaust brake,
An acquisition means for acquiring parameters including vehicle information including at least an accelerator opening, an engine speed, and a gear, road gradient information, and vehicle weight information;
First storage means for storing first information indicating a correspondence relationship between the degree of acceleration / deceleration of the vehicle and the parameter when the neutral inertial traveling device is used;
Second storage means for storing second information indicating a correspondence relationship between the degree of acceleration / deceleration of the vehicle when the exhaust brake is used and the parameter;
First estimation means for obtaining a first degree of acceleration / deceleration corresponding to the current parameter with reference to the first information;
Second estimation means for obtaining a second degree of acceleration / deceleration corresponding to the current parameter with reference to the second information;
An acceleration / deceleration degree display device comprising: display means for displaying the degree of the first acceleration / deceleration and the degree of the second acceleration / deceleration in a comparable manner. In the acceleration / deceleration degree display device according to claim 1 or 2,
The first estimating means and the second estimating means correct the degree of the first acceleration / deceleration and the degree of the second acceleration / deceleration, respectively, when the parameter varies,
The display means updates the display according to a correction result, and an acceleration / deceleration degree display device.

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