JP2012091757A - Display unit - Google Patents

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Publication number
JP2012091757A
JP2012091757A JP2010243067A JP2010243067A JP2012091757A JP 2012091757 A JP2012091757 A JP 2012091757A JP 2010243067 A JP2010243067 A JP 2010243067A JP 2010243067 A JP2010243067 A JP 2010243067A JP 2012091757 A JP2012091757 A JP 2012091757A
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JP
Japan
Prior art keywords
engine
display
vehicle
threshold value
display unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2010243067A
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Japanese (ja)
Inventor
Toru Ando
Makoto Hirai
徹 安藤
誠 平井
Original Assignee
Toyota Motor Corp
トヨタ自動車株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Toyota Motor Corp, トヨタ自動車株式会社 filed Critical Toyota Motor Corp
Priority to JP2010243067A priority Critical patent/JP2012091757A/en
Publication of JP2012091757A publication Critical patent/JP2012091757A/en
Application status is Pending legal-status Critical

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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/62Hybrid vehicles
    • Y02T10/6213Hybrid vehicles using ICE and electric energy storage, i.e. battery, capacitor
    • Y02T10/623Hybrid vehicles using ICE and electric energy storage, i.e. battery, capacitor of the series-parallel type
    • Y02T10/6239Differential gearing distribution type
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage for electromobility
    • Y02T10/7072Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y02T10/7077Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors on board the vehicle

Abstract

PROBLEM TO BE SOLVED: To properly suppress a sense of discomfort of a driver caused by a change of an engine speed.SOLUTION: The display unit (100) includes: a generator (12); an engine (11) that rotates and drives the generator; and a motor (13) that is operated by electric power generated by the generator. The display unit is mounted on a vehicle (1) in which the engine speed discretely changes in response to a vehicle speed. The display unit includes: a display part (22); and a display control device (21) for displaying a threshold where the engine speed changes, on the display part.

Description

  The present invention relates to a technical field of a display device and a method for displaying information indicating a traveling state of a vehicle to a driver in a vehicle such as a hybrid vehicle.

  As a device of this type, for example, in a hybrid vehicle, a display device that shows an accelerator opening at which an EV (electric vehicle) mode in which only a motor operates and an HV (hybrid vehicle) mode in which a motor and an engine operate are switched is proposed. (See Patent Document 1). Or the display apparatus which changes the length of a display figure based on an accelerator opening degree, and can recognize the area | region where a fuel consumption is favorable, and the area | region where a fuel consumption is not favorable is proposed by the length of a display figure. (See Patent Document 2).

  In series hybrid vehicles, a technique has been proposed in which the engine speed is set to low, medium, and high according to the vehicle speed (see Patent Document 3).

JP 2008-074321 A JP 2010-085483 A Japanese Patent Laid-Open No. 7-231509

  For example, as in the technique described in Patent Document 3, if the engine speed is set to three, low, medium, and high, the engine speed can change suddenly at a timing not intended by the driver. There is sex. Then, there is a technical problem that the driver may feel a sense of incongruity caused by a sudden change in the number of revolutions or an uncomfortable feeling caused by an increase in noise, for example. The techniques described in Patent Documents 1 and 2 have a technical problem that it is difficult to sufficiently suppress the driver's uncomfortable feeling and the like.

  The present invention has been made in view of, for example, the above problems, and an object of the present invention is to propose a display device that can suitably suppress a driver's uncomfortable feeling caused by a change in engine speed.

  In order to solve the above-described problems, a display device of the present invention includes a generator, an engine capable of rotating the generator, and a motor that operates with electric power generated by the generator, and the engine rotates. It is mounted on a vehicle whose number changes discretely according to the vehicle speed, and includes a display unit and display control means for displaying a threshold value at which the engine speed changes on the display unit.

  According to the display device of the present invention, the display device is mounted on a vehicle that includes a generator, an engine capable of rotationally driving the generator, and a motor that operates with electric power generated by the generator. . In the vehicle, the engine is controlled such that the rotational speed of the engine varies discretely according to the vehicle speed.

  Here, the motor is a motor for driving the vehicle. That is, the vehicle on which the display device is mounted is a so-called series hybrid vehicle that generates electric power with an engine and operates the motor with the obtained electric power to drive the vehicle.

  For example, a display control unit including a memory, a processor, and the like displays a threshold value at which the engine speed changes on a display unit such as a liquid crystal display. Here, the “threshold value” is not limited to being expressed as a vehicle speed, but may be expressed as a physical quantity or a parameter value directly or indirectly related to the vehicle speed such as the accelerator opening.

  In so-called series hybrid vehicles, the engine is often operated at a constant rotational speed for the purpose of, for example, improving exhaust gas characteristics and reducing fuel consumption. Further, the engine speed is often divided into a plurality of stages depending on, for example, the vehicle speed so as not to cause insufficient output. On the other hand, if no measures are taken, it is difficult for the driver to know in advance when the engine starts and when the engine speed changes. Then, when the engine speed changes suddenly at a timing unintended by the driver, the driver may feel uncomfortable.

  Therefore, in the present invention, as described above, the display control means displays the threshold value at which the engine speed changes on the display unit. For this reason, the driver can know the timing at which the engine speed changes relatively easily. As a result, it is possible to suitably suppress the driver's uncomfortable feeling caused by the change in the engine speed.

  The engine is not limited to a repsiro engine that is often used in known vehicles, and may be, for example, a gas turbine engine.

  In one aspect of the display device of the present invention, the display control means displays the threshold value on the display unit during operation of the engine.

  According to this aspect, when the engine is operating, the driver can relatively easily know the timing at which the engine speed changes.

  In another aspect of the display device of the present invention, when the threshold value is a variable value, the display control unit further displays a condition for changing the threshold value on the display unit.

  According to this aspect, the driver can know the condition (or reason) at which the threshold value changes, so the driver's anxiety caused by the change in the threshold value can be reduced.

  In another aspect of the display device of the present invention, the vehicle further includes power transmission control means for controlling transmission of power between the engine and driving wheels of the vehicle, and the display control means includes the power transmission. When the transmission of power between the engine and the driving wheel is cut off by the control means, the threshold value is displayed on the display unit.

  According to this aspect, the power transmission control means controls transmission of power between the engine and the drive wheels of the vehicle. Here, when power is transmitted between the engine and the drive wheels by the power transmission control means, the vehicle is driven by the engine and the motor. On the other hand, when the transmission of power between the engine and the drive wheels is cut off by the power transmission control means, the vehicle is driven only by the motor. That is, the vehicle according to this aspect is a so-called series parallel hybrid vehicle.

  The display control means displays the threshold value on the display unit when the power transmission control means cuts off the power transmission between the engine and the drive wheels (that is, in the series mode). Therefore, in the series mode in which the engine speed changes discretely, the driver can know the timing at which the engine speed changes relatively easily.

  The effect | action and other gain of this invention are clarified from the form for implementing demonstrated below.

It is a block diagram which shows the structure of the vehicle by which the display apparatus which concerns on 1st Embodiment is mounted. It is a characteristic view which shows an example of the relationship between load etc. and engine speed. It is a specific example of the image which ECU which concerns on 1st Embodiment displays on a display part. It is a specific example of the image which ECU which concerns on the modification of 1st Embodiment displays on a display part. It is a specific example of the image which ECU which concerns on 2nd Embodiment displays on a display part. It is a specific example of the image which ECU which concerns on the modification of 2nd Embodiment displays on a display part. It is a specific example of the image which ECU which concerns on 3rd Embodiment displays on a display part. It is a specific example of the image which ECU which concerns on 3rd Embodiment displays with a threshold value on a display part. It is a specific example of the image which ECU which concerns on the modification of 3rd Embodiment displays on a display part.

  Hereinafter, embodiments according to the display device of the present invention will be described with reference to the drawings.

<First Embodiment>
A first embodiment of the display device of the present invention will be described with reference to FIGS.

  First, the configuration of a vehicle equipped with a display device according to the present embodiment will be described with reference to FIG. FIG. 1 is a block diagram illustrating a configuration of a vehicle on which the display device according to the first embodiment is mounted. In FIG. 1, only members directly related to the present embodiment are shown, and the other members are not shown.

  In FIG. 1, a vehicle 1 includes an engine (E / G) 11, a motor / generator 12 (MG 1), a motor / generator 13 (MG 2), a planetary gear mechanism 14, a battery 16, an inverter 17, and an ECU (Electronic Control Unit) 21. It is configured with.

  The motor / generators 12 and 13 are electrically connected to a battery 16 such as a nickel metal hydride battery or a lithium ion battery via an inverter 17. The battery 16 can supply power to each of the motor generators 12 and 13 and can be charged by regenerative power of the motor generators 12 and 13.

  The planetary gear mechanism 14 includes a sun gear S, a pinion gear, a carrier CA that supports the pinion gear so that it can rotate and revolve, and a ring gear R. The sun gear S is connected to the rotating shaft of the motor / generator 12. The carrier CA is connected to the crankshaft of the engine 11. The ring gear R is selectively connected to the case as a non-rotating member attached to the vehicle body of the vehicle 1 via the brake B, and is selectively connected to the rotating shaft of the motor / generator 13 via the clutch CL. Is done.

  When the clutch CL is in the engaged state and the brake B is in the released state, at least a part of the driving force output from the motor / generator 13 and the driving force output from the engine 11 is transmitted to the drive wheels 15. Is done. That is, when the clutch CL is in the engaged state and the brake B is in the released state, the vehicle 1 travels using the motor / generator 13 and the engine 11 as drive sources (so-called parallel hybrid mode).

  On the other hand, when the clutch CL is in the released state and the brake B is in the engaged state, only the driving force output from the motor / generator 13 is transmitted to the driving wheel 15. That is, when the clutch CL is in the released state and the brake B is in the engaged state, the vehicle 1 travels using only the motor / generator 13 as a drive source (so-called series hybrid mode). In this case, the engine 11 is used only for rotationally driving the motor / generator 12 (that is, only power generation).

  Particularly in the present embodiment, in the case of the series hybrid mode, the ECU 21 determines that the rotational speed of the engine 11 varies according to the load of the vehicle 1, the accelerator opening, the vehicle speed, the required output, etc., as shown in FIG. The engine 11 is controlled so as to change periodically. Here, “load”, “accelerator opening”, and “required output” are physical quantities or parameters that indirectly represent the vehicle speed. Therefore, it can be considered that the rotation speed of the engine 11 changes discretely according to the vehicle speed. FIG. 2 is a characteristic diagram showing an example of the relationship between the load and the like and the engine speed.

  In the vehicle 1 configured as described above, it is difficult for the driver to know in advance the timing at which the engine 11 is started and the timing at which the rotation speed of the engine 11 changes unless any measures are taken. Then, when the rotation speed of the engine 11 suddenly changes at a timing not intended by the driver, the driver may feel uncomfortable.

  Therefore, the display device 100 is mounted on the vehicle 1 so that the driver can recognize in advance the timing at which the rotational speed of the engine 11 changes. The display device 100 includes a display unit 22 housed in, for example, an instrument panel of the vehicle 1 and an ECU 21 on the display unit 22 that displays a threshold value at which the rotational speed of the engine 11 changes. ing.

  The “motor / generator 13”, “ECU 22”, and “clutch CL” according to the present embodiment are examples of the “generator”, the “display control unit”, and the “power transmission control unit” according to the present invention, respectively. In the present embodiment, a part of the ECU 21 for various electronic controls of the vehicle 1 is used as a part of the display device 100.

  Specifically, the ECU 21 displays an image as shown in FIG. 3 on the display unit 22, for example. FIG. 3 is a specific example of an image displayed on the display unit 22 by the ECU 21. In FIG. 3, the upper row is an accelerator opening degree display bar, and the lower row is a threshold value display bar. Vertical lines th1 and th2 in the threshold display bar indicate thresholds at which the rotation speed of the engine 11 changes.

  The display of the accelerator opening display bar is sequentially changed according to the detected depression amount by, for example, detecting the depression amount of an accelerator pedal (not shown) by the ECU 21.

  In FIG. 3, the current value of the accelerator opening corresponds to the low load mode. From this state, when the driver further depresses the accelerator pedal and the value of the accelerator opening exceeds the vertical line th2, the mode shifts from the low load mode to the high load mode, and the rotational speed of the engine 11 increases. On the other hand, when the degree to which the driver depresses the accelerator pedal is reduced and the value of the accelerator opening is less than the vertical line th1, the engine 11 is stopped from the low load mode, ie, the EV mode.

  Thus, since the driver can easily recognize the relationship between the operation performed by the driver (in this case, the accelerator opening display bar) and the threshold value at which the rotation speed of the engine 11 changes, The driver's uncomfortable feeling due to the change in the rotational speed can be suitably suppressed.

  Note that the “stop mode”, “low load mode”, and “high load mode” in FIG. 3 correspond to the “stop mode”, “low load mode”, and “high load mode” in FIG. 2, respectively. The same applies to the subsequent drawings.

<Modification>
A modification of the display device according to the first embodiment will be described with reference to FIG. FIG. 4 is another specific example of an image displayed on the display unit 22 by the ECU 21 with the same concept as in FIG. 3. In FIG. 4, for example, the output of the motor / generator 13 is used as a parameter.

  In FIG. 4, in particular, the result of the operation performed by the driver (corresponding to the “accelerator opening display bar” in FIG. 3) and the threshold value at which the rotation speed of the engine 11 changes are displayed as one bar. For this reason, the driver can more easily recognize the relationship between the operation performed by the driver and the threshold value at which the rotation speed of the engine 11 changes.

<Second Embodiment>
A second embodiment according to the display device of the present invention will be described with reference to FIG. In the second embodiment, the configuration is the same as that of the first embodiment except that the threshold value at which the rotational speed of the engine 11 changes has a hysteresis characteristic. Therefore, in the second embodiment, the description overlapping with that of the first embodiment is omitted, and common portions on the drawing are denoted by the same reference numerals, and only fundamentally different points are described with reference to FIG. explain. FIG. 5 is another specific example of an image displayed on the display unit 22 by the ECU 21 with the same concept as in FIG. 3.

  As shown in FIG. 5, in this embodiment, the threshold value between the low load mode and the high load mode has a hysteresis characteristic. In FIG. 5, the threshold th3 is a threshold when shifting from the low load mode to the high load mode (that is, when the rotational speed of the engine 11 increases). On the other hand, the threshold th4 is a threshold when shifting from the high load mode to the low load mode (that is, when the rotational speed of the engine 11 decreases).

  FIG. 5A shows a specific example of an image displayed on the display unit 22 in the low load mode. On the other hand, FIG. 5B shows a specific example of an image displayed on the display unit 22 in the high load mode.

  In the present embodiment, in particular, if the driver is between the threshold th3 and the threshold th4, the driver can select one of the two operation modes (that is, the low load mode and the high load mode) with the same output. Can be recognized. As a result, either the low load mode or the high load mode can be selected at the driver's will.

<Modification>
A modification of the display device according to the second embodiment will be described with reference to FIG. FIG. 6 is another specific example of an image displayed on the display unit 22 by the ECU 21 with the same concept as in FIG. 5.

  In FIG. 6, in the case of the low load mode, the threshold th3 that is a threshold when shifting from the low load mode to the high load mode is indicated by a solid line, and the threshold that is a threshold when shifting from the high load mode to the low load mode th4 is indicated by a broken line (see FIG. 6A). On the other hand, in the case of the high load mode, the threshold th4 that is a threshold when shifting from the high load mode to the low load mode is indicated by a solid line, and the threshold th3 that is a threshold when shifting from the low load mode to the high load mode is set. It is indicated by a broken line.

<Third Embodiment>
A third embodiment of the display device of the present invention will be described with reference to FIG. In the third embodiment, the configuration is the same as that of the first embodiment except that the threshold value at which the rotational speed of the engine 11 changes varies depending on, for example, SOC (State Of Charge), temperature, and the like. Therefore, the description of the third embodiment that is the same as that of the first embodiment is omitted, and common portions in the drawing are denoted by the same reference numerals, and only fundamentally different points are described with reference to FIG. explain. FIG. 7 is another specific example of an image displayed on the display unit 22 by the ECU 21 with the same concept as in FIG. 3.

  In FIG. 7, the upper part shows a threshold value at which the current rotational speed of the engine 11 changes, and the lower part shows a threshold value at which the rotational speed of the engine 11 changes, for example, after 5 seconds. If comprised in this way, even if it is a case where the threshold value with which the rotation speed of the engine 11 changes changes with SOC, temperature, etc., for example, a driver | operator can recognize beforehand that a threshold value is changed. It can be recognized in advance that the rotational speed of the engine 11 changes as the threshold value changes.

  For example, in the case shown in FIG. 7, the driver can recognize relatively easily that the low-load mode is shifted to the high-load mode by changing the threshold value after 5 seconds.

  Furthermore, for example, if the ECU 21 is configured to display an image indicating the cause of the threshold change on the display unit 22 as shown in FIG. 8, the driver can relatively determine why the threshold is changed. It can be easily recognized and is very advantageous in practice. FIG. 8 is a specific example of an image that the ECU 21 displays on the display unit 22 together with the threshold value.

<Modification>
A modification of the display device according to the third embodiment will be described with reference to FIG. FIG. 9 is another specific example of an image displayed on the display unit 22 by the ECU 21 with the same concept as in FIG. 7.

  In this modification, the driver can recognize the change in the threshold value at which the rotation speed of the engine 11 changes in time series.

  The present invention is not limited to the above-described embodiments, and can be appropriately changed without departing from the gist or concept of the invention that can be read from the claims and the entire specification, and display devices with such changes are also possible. Moreover, it is included in the technical scope of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle, 11 ... Engine, 12, 13 ... Motor generator, 14 ... Planetary gear mechanism, 15 ... Drive wheel, 16 ... Battery, 21 ... ECU, 22 ... Display part

Claims (4)

  1. A generator, an engine capable of rotationally driving the generator, and a motor that is operated by the electric power generated by the generator are mounted on a vehicle in which the rotational speed of the engine varies discretely according to vehicle speed. ,
    A display unit;
    A display device comprising: display control means for displaying a threshold value at which the engine speed changes on the display unit.
  2.   The display device according to claim 1, wherein the display control unit displays the threshold value on the display unit during operation of the engine.
  3.   The display device according to claim 1, wherein when the threshold value is a variable value, the display control unit further displays a condition for changing the threshold value on the display unit.
  4. The vehicle further includes power transmission control means for controlling transmission of power between the engine and driving wheels of the vehicle,
    The display control means displays the threshold value on the display section when power transmission between the engine and the drive wheels is cut off by the power transmission control means. The display device according to any one of 1 to 3.
JP2010243067A 2010-10-29 2010-10-29 Display unit Pending JP2012091757A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014227024A (en) * 2013-05-22 2014-12-08 トヨタ自動車株式会社 Hybrid-vehicle display control device
JP2016133984A (en) * 2015-01-19 2016-07-25 トヨタ自動車株式会社 Vehicle system
JP6080234B1 (en) * 2015-11-17 2017-02-15 渡邉 雅弘 Hybrid vehicle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014227024A (en) * 2013-05-22 2014-12-08 トヨタ自動車株式会社 Hybrid-vehicle display control device
JP2016133984A (en) * 2015-01-19 2016-07-25 トヨタ自動車株式会社 Vehicle system
JP6080234B1 (en) * 2015-11-17 2017-02-15 渡邉 雅弘 Hybrid vehicle

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