JP5501075B2 - Power display device for hybrid vehicles - Google Patents

Description

  The present invention relates to a power display device for a hybrid vehicle that displays a power state of the hybrid vehicle.

  A hybrid vehicle is an automobile that uses both an engine that generates driving force by an internal combustion engine and an electric motor such as an electric motor that generates driving force by electric power. A hybrid vehicle is an eco-friendly vehicle that combines several power sources and realizes low fuel consumption and low emissions while taking advantage of the advantages of each. It improves fuel efficiency when running on gasoline alone, such as carbon dioxide and graphite. Reducing emissions.

  The hybrid vehicle uses an electric motor when starting, uses an engine and an electric motor together when accelerating, and charges the surplus power by operating the generator while running on the engine during a fixed run. And at the time of deceleration, it charges by regenerative power generation by an electric motor. In this way, the motor is skillfully used in driving conditions that the engine is not good at, and when the engine is operating, it operates efficiently and surplus driving force is used for charging.

  The display device for a hybrid electric vehicle shown in Patent Document 1 includes a first display that displays a total power obtained by adding the engine power output from the engine and the electric power output from the electric motor, and at least one of the engine power and the electric power. A second display for displaying, wherein the first and second displays are configured to display based on a common index or a common unit, and each display of the first and second displays It is configured to be parallel.

JP 2007-237970 A

  In the conventional hybrid electric vehicle display device described above, a pointer-type display that displays the amount of power (kW, etc.) with a pointer, and a bar-graph display that displays both engine power and motor power in a bar graph. There is a problem that it is difficult for the driver who is driving the vehicle to combine them. On the other hand, since it is necessary for the manufacturing side to combine two or more displays, there is a problem that the device structure is complicated and it is difficult to reduce the cost. In order to improve the visibility, it may be possible to separate the above-mentioned pointer type indicator and the bar graph indicator, but the automobile has a plurality of instruments such as a speedometer, a tachometer, a fuel gauge, and a thermometer. Therefore, it was difficult to add two pointer type indicators and a bar graph indicator there.

  Therefore, in view of the above-described problems, an object of the present invention is to provide a hybrid vehicle power display device that can display the power state of a hybrid vehicle with a single inexpensive and space-saving instruction display structure.

The power display device for a hybrid vehicle according to claim 1, which has been made in accordance with the present invention to solve the above-mentioned problems, has a display means for displaying an instruction within a predetermined instruction range E as shown in the basic configuration diagram of FIG. 1. 2, a predetermined instruction range within the instruction range E of the display means 2 is allocated as a power instruction range E1 of the total power of the hybrid vehicle, and the ratio between the engine power and the electric power of the hybrid vehicle is indicated by the display means 2 is a power display device 1 for hybrid vehicle that displays an instruction on the power information acquisition means 11a for acquiring power information of engine power and electric power of the hybrid vehicle, and the engine power or the electric power in the total power. The ratio calculating means 11b for calculating the ratio of the ratio based on the acquired power information, and the display means 2 Have a, a display control unit 11c for controlling to the instruction display in the serial power indicated range E1, the power indicated range E1 is a fixed range where the total power power to the upper limit of a predetermined associated It is characterized by that.

  According to the power display device for a hybrid vehicle of the present invention described in claim 1, the predetermined command range within the command range E of the display means 2 is allocated as the power command range E1 of the total power of the hybrid vehicle. When power information indicating engine output, motor drive power, etc. of the hybrid vehicle is acquired by the power information acquisition unit 11a, the ratio of engine power or electric power in the total power of the hybrid vehicle is calculated by the ratio calculation unit 11b. Calculated based on power information. Since the display means 2 is controlled by the display control means 11c so that the calculated ratio is indicated and displayed within the power instruction range E1, the ratio between the engine power and the electric power is indicated by the instruction display in the power instruction range E1. Can be recognized.

  According to a second aspect of the present invention, as shown in the basic configuration diagram of FIG. 1, in the hybrid vehicle power display device 1 according to the first aspect, the display means 2 is configured to display the engine power in the power command range E1. A predetermined desired range with a small ratio is an economy driving display area E11 of the hybrid vehicle.

  According to the power display device for a hybrid vehicle of the present invention described in claim 2, the desired range where the ratio of the engine power in the power command range E1 is small is the economy driving display region E11 of the hybrid vehicle. If the display means 2 displays the economy operation display area E11, it can be determined that the economy operation is performed.

  According to a third aspect of the present invention, as shown in the basic configuration diagram of FIG. 1, in the hybrid vehicle power display device 1 according to the first or second aspect, the indication range E of the display means 2 is the power indication range. E1 and a charging instruction range E2 that is connected to the power instruction range E1 and displays the charging state of the hybrid vehicle. The charging state information acquiring unit 11d acquires the charging state information of the hybrid vehicle. Charging determination means 11e for determining whether or not the hybrid vehicle is being charged based on the acquired charging state information, and the display control means 11c is charging the charging determination means 11e. When it is determined that the charging means range, the display means 2 is controlled to display the charging state within the charging instruction range E2.

  According to the power display device for a hybrid vehicle of the present invention described in claim 3, the instruction range E of the display means 2 is configured by the power instruction range E1 and the charge instruction range E2 being connected. When the charging state information is acquired by the electric state information acquisition unit 11d, it is determined whether or not the hybrid vehicle is being charged by the charging determination unit 11e. And when it determines with charging, the display means 2 is controlled by the display control means 11c so that the charge state may be instruct | indicated and displayed within the charge instruction | indication range E2.

  As described above, according to the first aspect of the present invention, the power instruction range is allocated within the instruction range of the display means, and the ratio of the engine power or the electric power in the total power of the hybrid vehicle within the power instruction range. Therefore, the power status of the engine power and the motor power in the hybrid vehicle can be indicated and displayed within the indicated range of one display means. Therefore, since it is not necessary to combine a plurality of indicators in order to display the power state of the hybrid vehicle as in the prior art, the power state of the hybrid vehicle can be displayed at a low cost and in a space-saving manner. In addition, since it is not necessary to refer to a plurality of indicators, even a driver who is driving can easily recognize the power state, so that visibility can be improved. Furthermore, since a pointer-type display device can be used as the display means, the cost can be reduced as compared with the case of using a liquid crystal display device.

  According to the second aspect of the present invention, in addition to the effect of the first aspect of the invention, the desired range in which the ratio of the engine power within the power command range is small is set as the economy operation display area. Within the indicated range, it is possible to instruct and display the power state of the engine power and motor power in the hybrid vehicle and to instruct and display economy driving. Accordingly, since the power state is instructed and displayed as a ratio with respect to the total power, the desired range with a small engine power ratio can be set as the economy operation display area, so that the economy operation is also displayed within one power instruction range. Can do.

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, it is necessary to display the power state of the hybrid vehicle with the indication range of the display means as the power indication range and the charge indication range. When there is no hybrid vehicle being charged, the charging state is instructed and displayed in the charging instructing range. There is no need to combine instruments, and one display means can be used without waste.

It is a block diagram which shows the basic composition of the power display apparatus for hybrid vehicles which concerns on this invention. It is a front view which shows an example of the display form of the power display apparatus for hybrid vehicles which concerns on this invention. It is a block diagram which shows schematic structure of the motive power display apparatus for hybrid vehicles of FIG. It is a flowchart which shows an example of the power display control process which concerns on this invention which CPU in FIG. 3 performs.

  Hereinafter, an embodiment of a power display device for a hybrid vehicle according to the present invention will be described with reference to the drawings of FIGS. The hybrid vehicle is an automobile equipped with two or more power sources. In the present embodiment, the description will be made on the assumption that the hybrid vehicle is equipped with two power sources, a gasoline engine and an electric motor.

  In FIG. 2, a hybrid vehicle power display device (hereinafter also referred to as a power display device) 1 is mounted on a hybrid vehicle, and indicates the ratio between the engine power and electric power of the hybrid vehicle within one display area. . The power display device 1 is communicably connected to a vehicle network of the hybrid vehicle. In the present embodiment, the communication protocol in the vehicle network is described as a known CAN (Controller Area Network), but various communication protocols such as LIN (Local Interconnect Network) can be adopted.

  As shown in FIGS. 2 and 3, the power display device 1 includes one display unit 2 and a control unit 10 that controls the display unit 2.

  First, the display means 2 is a pointer-type instrument (meter) having a pointer 20 and a dial plate 30. As is well known, the pointer 20 is disposed on the surface side of the dial 30 and has a pointer main body 21 and a pointer cap 22 that covers the center of rotation of the pointer main body 21. The pointer main body 21 has an instruction portion that extends from the rotation center of the pointer toward the tip. The pointer main body 21 is fixed to the tip of the output shaft of the internal unit, and the pointer main body 21 indicates an instruction position corresponding to the measurement amount by rotating the output shaft according to the measurement amount.

  The dial plate 30 is formed in a substantially disc shape with a light-transmitting synthetic resin such as polycarbonate. As shown in FIG. 2, the dial 30 is provided with a scale and an index 31 such as a numeral, a character, or a symbol on the surface near the peripheral edge corresponding to the predetermined indication range E corresponding to the pointer 20. Yes. The index 31 is formed on the surface of the surrounding dial 30 by extracting the cloth color of the dial 30 by printing a non-permeable member. That is, since the dial 30 is transparent at the portion of the indicator 31 and impermeable around it, the indicator 31 is displayed to the driver or the like by turning on the light source disposed on the back side of the dial 30. Light emission can be visually recognized.

  A predetermined indication range E of the dial 30 is a range that can be indicated by the pointer 20 and is a hoof-like portion near the periphery of the dial 30. The indication range E of the dial 30 has a power indication range E1 and a charge indication range E2 that is connected to the power indication range E1 and that indicates and displays the state of charge of the hybrid vehicle. And the power instruction | indication range E1 of this embodiment is an instruction | indication range for showing the ratio of the engine power of the total motive power of a hybrid vehicle.

  The total power is the total power obtained by adding the electric power and the engine power. As an example, the motor power value and the engine output value are calculated in a common unit (for example, [W]) and converted into a percentage. Ask. The ratio is calculated from a calculation formula of engine output value / (motor power value + engine output value). When there are three or more types of power of the hybrid vehicle, the result of adding all the powers can be the total power, and the result of adding only any power can be the total power. it can.

  The power command range E1 is a range in which a ratio is commanded and displayed between 0 and 100, and its unit is [POWER%]. The index 31 is provided at each indicated position of the dial 30 corresponding to 0, 20, 40, 60, 80, 100 in the range. The power command range E1 is an economy driving display area E11 of a hybrid vehicle that is a predetermined range of 0 to 20 [POWER%], which is a predetermined engine power ratio, and the other 21 to 100 [POWER%]. And a normal power display area E12 that is a range of. In addition, about the economy driving display area E11, the range can be set arbitrarily.

  The charge instruction range E2 is a range obtained by subtracting the power instruction range E1 from the instruction range E, and is continuously allocated below 0 of the power instruction range E1. The charging instruction range E2 is a range for displaying instructions from full charging of the hybrid vehicle battery to no battery. The charging instruction range E2 may be allocated continuously above the power instruction range E1 100, but by assigning it below the power instruction range E1 of 0 as in the present embodiment, the power instruction range E1. Thus, the pointer 20 can be smoothly transferred to the charging instruction range E2. In addition, the unit of the charging instruction range E2 can arbitrarily set a current value [A], a power value [kW], and the like.

  On the surface of the dial 30, an area name 33 indicating each of the economy driving display area E11 and the charging instruction range E2, an economy band portion 34 corresponding to the economy driving display area E11, and a charging band corresponding to the charging instruction range E2 The part 35 is attached by printing or the like. The area name 33 is provided in the vicinity of the economy operation display area E11 as “ECO” and the charging instruction range E2 as “CHG”.

  The economy band portion 34 is formed in a desired display color in a band shape over the economy operation display area E2. The charging band portion 35 is formed in a band shape over the charging instruction range E <b> 2 continuous from the economy band portion 35, and the display color is a display color different from that of the economy band portion 34. In addition, the economy belt | band | zone part 34 and the charging belt | band | zone part 35 may be made into the embodiment which is formed with the translucent coloring member on the surface of the dial plate 30, and is made to shine with the light from the light source arrange | positioned on the back side of the dial plate 30. it can.

  Next, as shown in FIG. 3, the control unit 10 includes a CPU (central processing unit) 11, a ROM (read only memory) 12, a RAM (random access memory) 13, and an EEPROM (electrically erasable programmable read only memory). ) 14 and a communication unit 15.

  The CPU 11 controls the entire meter ECU 1 and performs control according to a program stored in the ROM 12. The CPU 11 operates with electric power supplied from the vehicle battery via the power supply circuit 11b. The CPU 11 is activated in response to the change of the ignition switch (IGN +) of the vehicle from the OFF state to the ON state via the interface (I / F) 11i, and operates according to the change of the IGN + from the ON state to the OFF state. finish.

  The ROM 12 is a power for causing the CPU 11 to function as various means such as the power information acquisition means 11a, the ratio calculation means 11b, the display control means 11c, the charge state acquisition means 11d, and the charge determination means 11e in the claims shown in FIG. A display control program and the like are stored. The CPU 11 functions as various means such as a power information acquisition unit 11a, a ratio calculation unit 11b, a display control unit 11c, a charge state acquisition unit 11d, and a charge determination unit 11e by executing the power display control program. .

  The RAM 13 stores various data and has an area necessary for processing operations of the CPU 11. The EEPROM 14 is an electrically erasable / rewritable read-only memory, and is electrically connected to the CPU 11. The EEPROM 14 has a storage area capable of storing a plurality of pieces of power information indicating the engine output amount, motor drive power, battery current value, etc. of the hybrid vehicle acquired by the CPU 11 in time series. The power information may be provided for each type of data, or may have a configuration having a plurality of types of data.

  The communication unit 15 is communicably connected to an in-vehicle network such as a CAN built in the vehicle via the I / F 11i, and communicates with other electronic devices connected to the in-vehicle network 3 using a communication protocol such as CAN. . The communication unit 15 transmits information input from the CPU 11 to the transmission destination, and outputs information received from other electronic devices to the CPU 11. And this embodiment demonstrates the case where the power information mentioned above is acquired via the communication part 15 by CAN communication.

  The CPU 11 is electrically connected to the motor driver 16. The motor driver 16 is electrically connected to the internal unit or the like of the display unit 2 and drives the internal unit (motor) of each display unit 2 according to the measurement amount under the control of the CPU 11. Thereby, each display means 2 rotates the pointer 20 to the indicated position corresponding to the measurement amount, and displays the measurement amount in cooperation with the index 31 of the dial 30.

  Next, an example of the power display control process executed by the CPU 11 described above will be described below with reference to the flowchart of FIG.

  When the CPU 11 executes the power display control program, in step S11 (corresponding to the power information acquisition unit and the charge state information acquisition unit), the CPU 11 acquires the power information and the charge state information via the communication unit 15 and stores them in the EEPROM 14 in time series. Then, the process proceeds to step S12. As an example of the power information acquisition method, the engine output amount, motor drive power, and battery current value are acquired from corresponding ECUs, and the engine output amount and motor drive power are acquired as one power information. Various acquisition methods such as a method for acquiring the charge state information indicating the battery current value from the battery or the power receiving plug can be used.

  In step S12 (corresponding to charge determination means), the CPU 11 determines whether the battery of the hybrid vehicle is in a charged state based on the battery current value indicated by the acquired power information. In addition, the determination method of whether it is a charge state determines based on whether the electric current value of a battery is negative | minus, for example. If the CPU 11 determines that the battery is not in the charged state (N in S12), the process proceeds to step S13.

  In step S13 (corresponding to the ratio calculation means), the CPU 11 converts the motor power value and the engine output value based on the power information acquired in step S11 to match the units, and sets the engine output value (motor power value). + Engine output value) is divided by the total value, and the calculation result is converted to percentage to obtain the ratio of the engine power in the total power in the hybrid vehicle, and the ratio is converted into the indicated position in the power indication range E1 of the display means 2. Then, the data is stored in the RAM 13 or the like, and then the process proceeds to step S15.

  On the other hand, if the CPU 11 determines that the battery is in the charged state in step S12 (Y in S12), the battery current value indicated by the power information acquired in step S11 is the charge instruction range E2 of the display unit 2 described above in step S14. Is converted into the indicated position and stored in the RAM 13 or the like, and then the process proceeds to step S15.

  In step S15 (corresponding to display control means), the CPU 11 requests the motor driver 16 to rotate the pointer 20 to the indicated position based on the indicated position in the display means 2 stored in the RAM 13 or the like. Then, the instruction display on the display means 2 is controlled, and then the process proceeds to step S16. By this process, the motor driver 16 applies power to the internal unit to drive the pointer 20 so as to rotate the pointer 20 from the current indicated position of the pointer 20 to the requested indicated position, thereby rotating the pointer 20.

  The CPU 11 determines whether or not a termination request corresponding to turning off the accessory switch of the hybrid vehicle has been received. If the CPU 11 determines that it has not received an end request (N in S16), it returns to the process of step S11 and repeats a series of processes. On the other hand, if the CPU 11 determines that an end request has been received (Y in S16), the power display control process shown in FIG. 4 ends.

  When the CPU 11 executes the power display control process shown in FIG. 4 described above, the power information acquisition means 11a, the ratio calculation means 11b, the display control means 11c, and the charge state acquisition means 11d in the claims shown in FIG. The CPU 11 functions as the charging determination unit 11e and the like.

  Next, an example of the operation (action) according to the present invention of the power display device 1 described above will be described below with reference to the drawing of FIG.

  When the power display device 1 is activated in response to ON of an accessory switch of the hybrid vehicle or the like, the power display device 1 acquires power information and charge state information via the communication unit 15, and the hybrid vehicle is charged based on the charge state information. It is determined whether or not. When the power display device 1 determines that the state is not the charging state, the power display device 1 calculates the ratio of the engine power in the total power of the hybrid vehicle, and instructs the display means 2 to display the ratio.

  As a result, the engine power ratio is indicated and indicated by the pointer 20 within the power instruction range E1 of the display means 2. When the engine power ratio is high, the power display device 1 displays an instruction in the power display area E12 in the power instruction range E1 of the display unit 2. The power display device 1 displays an instruction in the economy operation display area E11 of the display means 2 when the engine power ratio is small, that is, when the hybrid vehicle is operating with electric power. Therefore, the driver can recognize the power state of the hybrid vehicle by recognizing the indicated position of the pointer 20 within the power instruction range E1 of the display means 2. And when a driver | operator tries the economy driving | operation, since it should just drive | operate so that the indication position of the pointer | guide 20 may be located in the economy driving | operation display area | region E11, an economy driving | operation can be supported.

  Further, when the hybrid vehicle is being charged, the ratio between the engine power and the electric power is 0. However, in the power display device 1, the portion of the power indication range E1 of the display means 2 that is equal to or less than 0 is the charge indication range E2. Therefore, the charging state of the battery is instructed and displayed within the charging instruction range E2. Accordingly, the driver or the like can recognize the state of charge of the battery by recognizing the indicated position of the pointer 20 within the charge instruction range E2.

  According to the power display device 1 described above, the power command range E1 is allocated within the command range E of the display means 2, and the ratio of engine power or electric power in the total power of the hybrid vehicle is commanded within the power command range E1. Since the desired range where the ratio of the engine power is small is the economy operation display area E11, the power status of the engine power and the motor power in the hybrid vehicle is indicated within the indication range E of one display means 2. While being able to display, it is possible to display an instruction for economy driving. Therefore, since it is not necessary to combine a plurality of indicators in order to display the power state of the hybrid vehicle as in the prior art, the power state of the hybrid vehicle can be displayed at a low cost and in a space-saving manner. In addition, since it is not necessary to refer to a plurality of indicators, even a driver who is driving can easily recognize the power state, so that visibility can be improved. Furthermore, since the power state is indicated and displayed as a ratio with respect to the total power, the desired range where the engine power ratio is small can be set as the economy operation display area, so that the economy operation is also displayed within one power instruction range. Can do.

  Further, the indication range E of the display means 2 is set to the power indication range E1 and the charge indication range E2, and when the hybrid vehicle that does not need to display the power state of the hybrid vehicle is being charged, the charge state is indicated in the charge indication range E2. Since the charging state can be instructed and displayed in the charging instruction range E2 within the instruction range E of one display means 2, there is no need to combine a plurality of displays, and one display means 2 is used without waste. can do.

  In the above-described embodiment, the case where the power instruction range E1 of the display unit 2 indicates and displays the ratio of the engine power in the total power of the hybrid vehicle has been described. Instead of this, it is possible to display the ratio of the electric power to the total power. In this case, for example, the range of 80 to 100 of the power instruction range E1 shown in FIG. 2 is the economy operation display area E11.

  In addition, the power instruction range E1 and the charge instruction range E2 of the display unit 2 can be an embodiment in which the display range is switched by operating an operation switch. Furthermore, although the case where the display means 2 described above rotates the pointer 20 has been described, instead of this, an embodiment in which the pointer 20 is moved linearly may be employed.

  Furthermore, in the above-described embodiment, the case where the desired range in which the ratio of engine power in the power instruction range E1 of the power display device 1 is small is set as the economy operation display area E11 has been described. Instead of this, an embodiment in which the power state is simply displayed without providing the above-described economy operation display area E11 in the power instruction range E1 of the display means 2 may be employed.

  In the above-described embodiment, the case where the display unit 2 is a pointer-type meter has been described. However, instead of this, for example, a graphic meter whose liquid crystal display is entirely or partially can be applied to the display unit 2.

  As described above, the above-described embodiments are merely representative forms of the present invention, and the present invention is not limited to the embodiments. That is, various modifications can be made without departing from the scope of the present invention.

1 Power display device for hybrid vehicles (power display device)
2 Display means 11a Power information acquisition means (CPU)
11b Ratio calculation means (CPU)
11c Display control means (CPU)
11d Charge state information acquisition means (CPU)
11e Charge determination means (CPU)
E Instruction range E1 Power indication range E2 Charge indication range E11 Economy operation display area E12 Power indication area

Claims (3)

A display unit for displaying an indication within a predetermined indication range E, wherein a predetermined indication range within the indication range of the display means is allocated as a power indication range of the total power of the hybrid vehicle, and the engine of the hybrid vehicle A power display device for a hybrid vehicle that displays an indication of a ratio between power and electric power on the display means,
Power information acquisition means for acquiring power information of engine power and electric power of the hybrid vehicle;
A ratio calculating means for calculating a ratio of the engine power or the electric power in the total motive power based on the acquired power information;
Display control means for controlling the display means to display and display the calculated ratio within the power instruction range;
I have a,
The power indication range for a hybrid vehicle , wherein the power indication range is a predetermined fixed range in which the upper limit is associated with the total power .   2. The hybrid vehicle according to claim 1, wherein the display means has a predetermined desired range with a small ratio of the engine power in the power command range as an economy operation display region of the hybrid vehicle. Power display device. The indication range of the display means includes the power indication range and a charge indication range that is connected to the power indication range and indicates the charge state of the hybrid vehicle.
Charging state information acquisition means for acquiring charging state information of the hybrid vehicle;
Charging determination means for determining whether or not the hybrid vehicle is being charged based on the acquired charging state information;
The display control means is means for controlling the display means so as to indicate and display the charge state within the charge instruction range when the charge determination means determines that charging is in progress. The power display apparatus for hybrid vehicles according to claim 1 or 2.

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