JP2007261581A - Analog display device for hybrid vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an analog display device for hybrid vehicle, capable of continuously displaying information for a desired power source while reducing the size and cost, and disposing a display part in an easy-to-see position. <P>SOLUTION: The analog display device for a hybrid vehicle comprising an engine and a motor as a power source in vehicle traveling comprises an analog display part 12 capable of switchingly displaying engine rotating speed and motor output; and a display control means 31 for displaying, according to switching of the power source, either the engine rotating speed or the motor output to the analog display part 12 in different display forms, respectively. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an analog display device for a hybrid vehicle including an engine and a motor as a power source when the vehicle is running.

  As a conventional display device in a hybrid vehicle, there is provided an indicator having a mode display unit that displays an operation mode on an instrument panel, a rotation number display unit that displays a rotation number, and a torque display unit that displays torque, and a vehicle operation mode Depending on the mode display section, “motor drive”, “engine drive”, “engine + motor drive” are displayed, and the rotation speed display section displays the rotation speed of the input shaft of the transmission, motor rotation speed or engine rotation speed. A torque display unit that displays torque of an input shaft of a transmission, motor torque, or engine torque is known (see, for example, Patent Document 1).

JP-A-10-129298

  However, in the display device disclosed in Patent Document 1, the display contents on the rotation speed display unit and the torque display unit are automatically switched according to the operation mode, so that the driver can use one of the power sources of the engine or the motor. Even if it is desired to continuously observe only the information on the display, if the operation mode is switched, the display contents are automatically switched accordingly, and thus the driver's request cannot be met.

  As a solution to this problem, for example, it is conceivable that the engine speed is always displayed on the rotation speed display section, and the motor output is always displayed on the torque display section instead of the torque.

  However, in the configuration in which the two display units of the engine speed display unit and the motor output display unit are separately provided as described above, the display device is required because it causes an increase in cost and requires two installation spaces for the display unit. It is difficult to arrange the two separated display portions at positions where the driver can easily see them.

  Accordingly, an object of the present invention made in view of such circumstances is to provide a hybrid vehicle that can continuously display information of a desired power source, can be reduced in size and cost, and can be easily arranged at a position where the display unit can be easily viewed. An analog display device is provided.

  The invention of the analog display device for a hybrid vehicle according to claim 1 that achieves the above object is an analog display device for a hybrid vehicle that includes an engine and a motor as a power source when the vehicle travels, and switches and displays the engine speed and the motor output. An analog display unit that can be displayed, and a display control unit that displays either the engine speed or the motor output in a different display form on the analog display unit in accordance with switching of a power source. .

  According to a second aspect of the present invention, in the analog display device for a hybrid vehicle according to the first aspect, the analog display unit includes a pointer, a scale display unit, and a unit display unit capable of displaying units of engine speed and motor output. The scale display unit and the unit display unit are displayed in different display forms when displaying the engine speed and when displaying the motor output.

  According to a third aspect of the present invention, in the analog display device for a hybrid vehicle according to the second aspect, the unit display section is a rotation speed unit display section that displays a unit of engine rotation speed and a motor unit output that displays a unit of motor output. A display unit, and when displaying the engine speed, only the rotation unit display unit is displayed, and when displaying the motor output, only the motor output unit display unit is displayed. .

  According to this invention, the display of the engine speed or the motor output on the analog display unit can be continuously displayed according to the switching of the power source. In addition, since the engine speed or the motor output is displayed on the common display unit, the display device can be reduced in size and cost, and can be easily arranged at a position where the display unit can be easily seen.

  Hereinafter, embodiments of an analog display device for a hybrid vehicle according to the present invention will be described with reference to FIGS. 1 to 8.

  FIG. 1 to FIG. 5 are diagrams for explaining an operation mode of a hybrid vehicle implementing the present invention, FIG. 6 is an external view of a combination meter having a display unit of a display device in the present embodiment, and FIG. A block diagram showing the electrical configuration of the combination meter, and FIG. 8 is a flowchart for explaining a display mode selection operation according to the present embodiment.

  The hybrid vehicle shown in FIGS. 1 to 5 includes an engine 1 and a motor 2 as power sources when the vehicle travels, and the engine 1 drives wheels 5 via a clutch 3 and a transmission 4. The motor 2 is driven by a battery 6 via an inverter 7, thereby driving the wheels 5 via the transmission 4. Further, a generator 8 is coupled to the engine 1, and the battery 6 is charged via an inverter 9 by the output of the generator 8.

  In this hybrid vehicle, during normal traveling at a predetermined speed (for example, 80 km / h) or less, as shown in FIG. 1, the clutch 3 is turned off, the motor 2 is driven by the battery 6, and the motor 2 is used as a drive source. Motor running mode. In this motor travel mode, the engine 1 is normally off, and when the charge amount of the battery 6 decreases, the engine 1 rotates and the generator 8 generates electric power, whereby the battery 6 is charged via the inverter 9. Is done.

  Further, during normal traveling at a predetermined speed or higher, as shown in FIG. 2, the clutch 3 is turned on to enter an engine traveling mode in which the engine 1 is driven. When the charge amount of the battery 6 decreases, the generator 8 causes the inverter 9 to operate. Is charged through.

  Further, when the vehicle is overloaded at a predetermined speed or more, as shown in FIG. 3, the motor 2 is also driven to enter the engine + motor running mode using both the engine 1 and the motor 2 as drive sources, and the battery 6 is charged. Is reduced, the generator 8 is charged via the inverter 9.

  Further, as shown in FIG. 4, in the regenerative mode of the motor 2 in which the clutch 3 is in the OFF state, the motor 2 acts as a generator, and the battery 6 is charged via the inverter 7 by the power generation. Yes.

  Further, as shown in FIG. 5, in the vehicle stop mode in which the clutch 3 is in the OFF state, when the charge amount of the battery 6 decreases, the engine 1 rotates and the battery 6 is connected via the inverter 9 by the generator 8. It is supposed to be charged.

  In the present embodiment, a combination meter 11 as shown in FIG. 6 is provided on an instrument panel arranged in front of the driver's seat. The combination meter 11 includes a tachometer 12, a speed meter 13, a fuel meter 14, a temp meter 15, a trip knob 16, and various warning lamps.

  The tachometer 12 constitutes a common display unit in the present invention, and functions as a tachometer that indicates the engine speed for the engine 1 and functions as an output meter that indicates the motor output for the motor 2. . The tachometer 12 has a scale display portion that can be lit, and in the tachometer 12, a rotation speed unit indicator 21 that displays a unit “× 1000 r / min” of an engine speed, and a unit “×” of a motor output. An output unit indicator 22 that displays “10 kw”, an operation state indicator 23 that displays “READY” indicating completion of traveling preparation, and the like are provided.

  Further, the speedometer 13 includes an odometer 25 composed of a plurality of 7-segment liquid crystal display elements for displaying the total travel distance, and a trip composed of a plurality of 7-segment liquid crystal display elements for switching and displaying two types of trips A and Trip B. A meter 26 is provided, and the trip meter 26 switches between trip A and trip B by pressing the trip knob 16.

  In the present embodiment, the existing trip knob 16 is also used as a display mode selection means, and based on the pushing operation, in addition to switching between trip A and trip B, the tachometer 12 is used as a display mode selection screen. "Automatic switching display mode" that automatically displays the engine speed or motor output according to the power source switching, and "Engine speed fixed display mode" that displays the engine speed fixedly. And a desired display mode can be selected from the “motor output fixed display mode” in which the motor output is fixedly displayed.

  Further, the trip meter 26 is also used as a mode display means, and in accordance with the display mode selection operation by the trip knob 16, for example, “AUt0” is displayed in the automatic switching display mode, and the engine speed is displayed. “EG0” is displayed in the fixed display mode, and “EG−” is displayed in the motor output fixed display mode.

  As shown in FIG. 7, the various meters and warning lamps provided in the combination meter 11 are driven and controlled by a display controller 31 comprising a microcomputer. FIG. 7 shows only the tachometer 12, the speed meter 13, the fuel meter 14, and the temp meter 15, and other meters and warning lamps are not shown.

  Therefore, the engine speed pulse (TA pulse), the motor output information and the READY information are supplied from the hybrid control unit (H / BCU) 32 to the display controller 31, and the shift range information from the transmission control unit (TCU) 33. The vehicle speed sensor 34 supplies vehicle speed pulses, the fuel sensor 35 supplies fuel information, and the temperature sensor 36 supplies temperature information. The display controller 31 is connected to an ACC switch 37 driven by a key, a parking switch 38 driven by a shift knob, and a trip switch 39 driven by a trip knob 16.

  In this way, under the control of the display controller 31, the engine speed or motor output is displayed on the tachometer 12 based on the engine rotation pulse or motor output information in accordance with the selected display mode, and the vehicle speed pulse is displayed. The vehicle speed is displayed on the speedometer 13 based on the fuel information, the fuel remaining amount is displayed on the fuel meter 14 based on the fuel information, and the coolant temperature is displayed on the tempmeter 15 based on the temperature information. Although not shown, the display controller 31 is also supplied with information necessary for driving other meters and warning lamps.

  Hereinafter, the display mode selection operation by the display device of the present embodiment will be described with reference to the flowchart shown in FIG.

  In the present embodiment, when the shift knob is in the parking position, the vehicle speed is 0 km, the key is in the ACC position, and the READY information is not “READY”, the vehicle is set as a predetermined stop state. The display mode for the tachometer 12 can be selected under the state. Therefore, first, the display controller 31 monitors the READY information from the H / BCU 32, the shift range information from the TCU 33, the state of the parking switch 38, and the state of the ACC switch 37, and the vehicle is in a predetermined stop state. Whether or not the tachometer 12 is on the display mode selection screen is determined (step S2).

  Here, when the display mode selection screen is not displayed, the trip meter 26 is turned on by, for example, pressing the trip knob 16 for a short time and turning on the trip switch 39 for a short time while the vehicle is in a predetermined stop state. In this state, the trip knob 16 is further pushed in for a short time, the trip switch 39 is turned on for a short time, trip A and trip B are sequentially displayed on the trip meter 26, and the tachometer 12 is set as a display mode selection screen ( Step S3).

  In the display mode selection screen, for example, the scale display section of the tachometer 12 is blinked, or instead of the blink display of the scale display section, or together with the blink display of the scale display section, the rotation speed unit indicator 21 and the output unit are displayed. “× 1000 r / min” and “× 10 kW” are blinked on the display 22.

  In step S2, when the tachometer 12 is on the display mode selection screen, the display mode of the tachometer 12 is changed to “automatic switching display mode” each time the trip knob 39 is pressed and turned on for a predetermined time. A desired display mode is selected by sequentially switching to “engine speed fixed display mode” and “motor output fixed display mode” (step S4).

  In this display mode selection operation, the trip meter 26 displays “AUt0” in “automatic switching display mode”, “EG0” in “engine speed fixed display mode”, and “motor output fixed display mode”. Then, “EG-” is displayed. Further, if necessary, in the “automatic switching display mode”, the scale display section of the tachometer 12 is fully lit, and “× 1000 r / min” and “× 10 kW” are displayed on the rotation speed unit display 21 and the output unit display 22. In the “engine speed fixed display mode”, the scale display section of the tachometer 12 is lit up to, for example, 8000 rpm, and 6000 to 8000 rpm is displayed in a red zone in red, and the speed unit indicator 21 In the “motor output fixed display mode”, the scale display portion of the tachometer 12 is fully lit and “× 10 kW” is flashed on the output unit display 22.

  Thereafter, it is detected whether or not the predetermined stop state of the vehicle has been released, that is, whether or not the condition that the shift knob is in the parking position, the vehicle speed is 0 km, the key is in the ACC position, and the READY information is not “READY” is released. (Step S5) When it is still in the predetermined stop state, the process returns to Step S4, and when the predetermined stop state is released, the display mode selected by switching last is determined as the display mode of the tachometer 12 (Step S5). S6) The display mode selection operation is terminated.

  In addition, after the selection operation of the display mode is completed, in the “automatic switching display mode”, when the engine 1 becomes a driving source according to the switching of the power source, the scale display portion of the tachometer 12 is lit up to, for example, 8000 rpm ( Among them, 6000 to 8000 rpm is displayed in a red zone), and “× 1000 r / min” is displayed on the rotation speed unit display 21, and when the motor 2 becomes a power source, the scale display portion of the tachometer 12 is fully lit. At the same time, “× 10 kW” is displayed on the output unit display 22. The trip meter 26 displays “AUt0” until the trip knob 16 is pressed for a short time to return to the trip display.

  Similarly, in the “engine speed fixed display mode”, the scale display portion of the tachometer 12 is lit up to, for example, 8000 rpm (of which 6000 to 8000 rpm is displayed in a red zone), and “× 1000 r / min” is displayed on the speed unit display 21. Is displayed, and “EG0” is displayed on the trip meter 26 until the trip knob 16 is pressed for a short time to return to the trip display. In the “motor output fixed display mode”, the scale display section of the tachometer 12 is fully lit and “× 10 kW” is displayed on the output unit indicator 22, and the trip knob 16 is set on the trip meter 26 for a short time. “EG-” is displayed until the trip display is displayed.

  As described above, in the present embodiment, the display mode of the engine speed or motor output to the tachometer 12, which is a common display unit, is changed to an automatic switching display mode, an engine speed fixed display mode, or Since the motor output fixed display mode can be selected, the selected engine speed or motor output can be continuously displayed even when the power source is switched.

  Therefore, for example, by selecting the engine speed fixed display mode, the engine speed can be continuously displayed even when the operation mode is switched to the motor travel mode shown in FIG. 1, and the motor output fixed display mode is selected. Thus, even when the operation mode is switched to the engine running mode shown in FIG. 2 or the engine + motor running mode shown in FIG. 3, the motor output can be continuously displayed.

  In addition, since the engine speed or the motor output is switched to the single tachometer 12 and displayed, the display device can be reduced in size and cost, and can be easily arranged at a position where the tachometer 12 can be easily seen.

  Further, since the trip knob 16 for switching the display of the trip meter 26 is used to select the display mode based on the operation, there is no need to newly provide an operation unit for selecting the display mode. Miniaturization and cost reduction can be achieved.

  Further, since the selected display mode is displayed on the trip meter 26, the current display mode can be easily recognized, and the display mode selection operation is effective when the vehicle is in a predetermined stop state. Therefore, safety can be ensured.

  Note that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the invention. For example, when the vehicle has a navigation system, the display mode can be selected using the monitor, or the selected display mode can be displayed. Furthermore, on the display mode selection screen, the entire combination meter 11 can be blinked.

  In the above embodiment, after the desired display mode is selected, when the vehicle is no longer in the predetermined stop state, the last selected display mode is determined as the display mode of the tachometer 12. After selecting the desired display mode, the selected display mode can be determined by pressing the trip knob 16 for a short time to return the trip meter 26 to the trip display.

It is a figure for demonstrating the motor drive mode in the hybrid vehicle which implements this invention. Similarly, it is a figure for demonstrating engine driving mode. Similarly, it is a figure for demonstrating an engine + motor drive mode. Similarly, it is a figure for demonstrating regeneration mode. Similarly, it is a figure for demonstrating stop mode. It is an external view of the combination meter which has a display part of the display apparatus in this Embodiment. Similarly, it is a block diagram which shows the electric constitution of a combination meter. It is a flowchart for demonstrating selection operation | movement of the display mode by this Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Engine 2 Motor 3 Clutch 4 Transmission 5 Wheel 6 Battery 7 Inverter 8 Generator 9 Inverter 11 Combination meter 12 Tachometer 13 Speed meter 14 Fuel meter 15 Temp meter 16 Trip knob 21 Speed unit indicator 22 Output unit indicator 23 Operation status indicator 25 Odometer 26 Trip meter 31 Display controller 32 Hybrid control unit (H / BCU)
33 Transmission Control Unit (TCU)
34 Vehicle speed sensor 35 Fuel sensor 36 Temperature sensor 37 ACC switch 38 Parking switch 39 Trip switch

Claims (3)

In an analog display device of a hybrid vehicle provided with an engine and a motor as a power source during vehicle travel,
An analog display that can switch and display engine speed and motor output;
A display device for a hybrid vehicle, comprising: display control means for displaying either the engine speed or the motor output in a different display form on the analog display unit in accordance with switching of a power source. . The analog display unit includes a pointer, a scale display unit, and a unit display unit that can display a unit of engine speed and motor output,
The analog of a hybrid vehicle according to claim 1, wherein at least the scale display unit and the unit display unit are displayed in different display modes when displaying the engine speed and when displaying the motor output. Display device. The unit display section includes a rotation speed unit display section that displays a unit of engine rotation speed and a motor unit output display section that displays a unit of motor output.
3. The hybrid according to claim 2, wherein when displaying the engine speed, only the speed unit display section is displayed, and when displaying the motor output, only the motor output unit display section is displayed. An analog display device for a vehicle.

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