JP2008132872A - Information display device for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information display device for an automobile capable of reducing the cost of an instrument panel, obtaining information necessary for an occupant and allowing the occupant to recognize the operational state of the automobile without wastefully blocking a field of front vision. <P>SOLUTION: The information display device is capable of changing a first projecting state in which only an upper display area 51 is exposed and visually recognized by an occupant and a second projecting state in which both the upper display area 51 and a lower display area 52 are exposed and visually recognized by the occupant to each other. When an engine is stopped, a storage state is realized, in which a display monitor 5 is stored so as to form a substantially continuous surface together with an upper surface part of an instrument panel 4. When an ignition starter 9 is operated, the state is changed to the first projecting state. When an on-vehicle device for displaying the state or information on the lower display area 52 (for example, an HDD player 13, a TV set 14, a car navigation device 17) is operated, the state is changed to the second projecting state. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an information display device for an automobile in which a display monitor for displaying the state or information of the in-vehicle device of the automobile is arranged on an instrument panel.

  2. Description of the Related Art Conventionally, there are known devices that display various information such as navigation information and the state of an on-vehicle device such as an audio device and an air conditioner on a display means such as a liquid crystal display monitor.

  Among them, the following Patent Document 1 discloses a display device in which the display monitor is arranged on an instrument panel of a vehicle, and the protruding state of the display monitor can be switched according to the necessity of displaying navigation information. It is like that.

  Specifically, if there is a need to display navigation information, the display screen area of the display monitor is maximized. If there is no need to display navigation information, the protruding state of the display monitor is reduced to about half. Thus, the minimum necessary information such as date, time, or (operation) state of the in-vehicle device is displayed.

  With such a configuration, only a portion necessary for displaying information required by the occupant (driver) can be projected from the upper surface portion of the instrument panel. Necessary information can be obtained immediately if the occupant gazes at the display monitor without obstructing it unnecessarily.

Japanese Patent Laid-Open No. 10-38593

  By the way, the automobile can turn the engine start means (ignition key cylinder) of the vehicle into a predetermined operating state (meaning an accessory ON state or an engine operating state) by rotating a predetermined key.

  In addition, if an immobilizer system that authenticates a unique identification code by communication between a portable device and an in-vehicle device without using a key is used, after the above authentication, by rotating a predetermined ignition starter, The predetermined operating state can be obtained.

  Such an operating state, that is, the operating state of the vehicle including the on state of the power train that can be driven, is often recognized by hearing using the engine sound. Here, as described above, the information display device disclosed in Patent Document 1 enables navigation information, the state of the in-vehicle device, and the like to be displayed, but is configured to recognize the operating state of the vehicle. In this case as well, the operating state of the vehicle is recognized by hearing.

  The present invention is an automobile in which a passenger can obtain necessary information and can recognize the operating state of the vehicle while reducing the cost of the instrument panel without unnecessarily blocking the front view. It is an object to provide an information display device.

  In the vehicle information display device according to the present invention, a display monitor for displaying the state or information of the in-vehicle device of the vehicle is arranged on the instrument panel, and the display monitor is projected from the upper surface of the instrument panel. An information display device for an automobile that can be switched between a protruding state and a storage state in which the display monitor is stored in the instrument panel. The display monitor includes an upper display region, and an upper display region. A first display state in which only the upper display area is exposed on the upper surface of the instrument panel and visually recognized by the passenger, and the upper display area and the lower display area are both exposed. To the second projecting state to be visually recognized by the occupant, and when the engine is stopped, The display monitor is stored in a storage state so as to form a substantially continuous surface with the upper surface portion of the instrument panel, and when the engine starting means is operated, the display is switched to the first protruding state, and the state or information is displayed in the lower display area. When the on-vehicle device to be displayed is operated, it is switched to the second protruding state.

  According to this configuration, when the vehicle-mounted device whose state or information is displayed in the lower display area is in the second projecting state, the upper display area is provided on the upper surface of the instrument panel until the operation is performed. Since only the portion necessary for displaying the information required by the occupant (driver) can be projected from the upper surface of the instrument panel by adopting the first projecting state in which only the vehicle is exposed. The necessary information can be obtained immediately if the occupant gazes at the display monitor without unnecessarily blocking the front view by the display monitor.

  Furthermore, by providing the display monitor with the upper display area and the lower display area, a dedicated display for displaying characters, icons, and the like can be eliminated, so that the cost of the instrument panel can be reduced. .

  Further, when the engine is stopped, the retracted state is set, and when the engine starting means is operated, the first projecting state is switched to visually recognize the operating state of the engine starting means, that is, the operating state of the vehicle. be able to.

  In one embodiment of the present invention, when the engine stop operation is performed from the operating state of the engine starting means, the display monitor is switched from the first protruding state or the second protruding state to the storage state. And

  According to this configuration, when the engine is not in operation after the engine stop operation is performed, the display monitor can be always stored. Therefore, compared to the case where it is always in a protruding state even when not in use, the influence of direct sunlight on the display monitor, the destruction of the display monitor by a thief, the possibility of theft, etc. can be reliably prevented, and the engine The occupant can visually recognize the stop state, that is, the state in which the power train is off and the vehicle cannot be driven.

  In one embodiment of the present invention, when the predetermined on-vehicle device is operated, the second projecting state is switched, and a large number of pixels are formed on the entire screen including the upper display area and the lower display area of the display monitor. An arbitrarily generated image is displayed by a combination of the above.

  According to this configuration, a larger screen display can be achieved for the purpose of viewing the video itself.

  One embodiment of the present invention is characterized in that it is mounted on a hybrid vehicle that travels in combination with an electric motor that generates driving force by electric power and an engine that generates driving force by an internal combustion engine.

  In a hybrid vehicle, only the above-mentioned electric motor may be driven when starting and running at a low speed, so that a driving sound such as an engine sound at the time of driving the engine is not generated, and the occupant can audibly check the on-state of the powertrain. It becomes difficult to recognize. According to this configuration, even in a hybrid vehicle, the on-state of the powertrain can always be visually recognized based on the presence or absence of the protrusion of the display monitor.

  According to the present invention, when the vehicle-mounted device whose state or information is displayed in the lower display area is operated, the second protruding state is set, and only the upper display area is provided on the upper surface of the instrument panel until the operation is performed. By setting the first projecting state to be exposed, the necessary information can be obtained immediately when the occupant gazes at the display monitor without unnecessarily blocking the front view by the display monitor.

  Since the display monitor includes the upper display area and the lower display area, a dedicated display for displaying characters, icons, and the like can be eliminated, so that the cost of the instrument panel can be reduced.

  Furthermore, the operating state of the vehicle can be visually recognized by setting the storage state when the engine is stopped and switching to the first protruding state when operating the engine starting means.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a front perspective view of a vehicle interior showing a schematic configuration of an instrument panel 4 incorporating an information display device according to the present embodiment. A vehicle 1 according to the present embodiment is a so-called left-hand drive specification vehicle, and a steering 2 and an instrument device 3 are disposed in front of a left front seat (that is, a driver's seat). The seat is attached to the instrument panel 4 in front of the right front seat (that is, the front passenger seat). A display monitor 5 constituting the information display device of the present embodiment is disposed at a substantially central position in the vehicle width direction of the upper surface portion of the instrument panel 4.

  The display monitor 5 serves as a display unit of the information display device, and includes, for example, a color liquid crystal display. The display monitor 5 is provided so as to be movable up and down by an appropriate lifting mechanism (not shown) as disclosed in, for example, Japanese Patent Laid-Open No. 10-38593 and Japanese Patent Laid-Open No. 2000-62542. Yes.

  As a result, the display monitor 5 causes the display screen to protrude from the upper surface of the instrument panel 4 by the lifting mechanism, and displays various information such as the state of various on-vehicle devices described later and navigation information. It has become.

  The member 6 shown in FIG. 1 is an operation panel unit for performing operations for operating various in-vehicle devices, and is disposed in a portion extending downward from the center of the instrument panel 4 toward the rear. It is placed in a position where it can be easily reached from the driver's seat and passenger seat.

  FIG. 2 is a control block diagram for executing display control processing of the information display apparatus according to the present embodiment. The operation panel unit 6 has a touch panel 7 on its surface. For example, the operation panel unit 6 displays various types of information displayed on the touch panel display 8 in the back as in the operation panel means disclosed in Japanese Patent Laid-Open No. 2006-103358. These images can be clearly observed through the touch panel 7. And the said touch panel 7 detects the contact position by an operator's contact operation, and outputs the signal regarding the contact position.

  In the present embodiment, an in-vehicle device ECU 20 is provided that allows an operation signal from an ignition starter 9 for starting the engine 102 (see FIG. 6) to be input via the ECU 10 (described later). The in-vehicle device ECU 20 can input a signal related to the contact position detected by the touch panel 7.

  The ignition starter 9 is composed of an ignition key cylinder that can be rotated by inserting a predetermined key. However, if a so-called immobilizer system that authenticates a unique identification code through communication between the portable device and the vehicle-mounted device is adopted, a keyless ignition starter in which the key knob can be rotated after the authentication is obtained.

  The ignition starter 9 can switch four operations of accessory (ACC) OFF, accessory ON, ignition (IG) ON, and ignition START by rotating the key or the key knob. When the ignition starter 9 is operated to the ignition START, the engine 102 is started. In addition, the ignition starter 9 may be configured by a push button and may be accompanied by a pressing operation in addition to the rotating operation.

  By the way, in the in-vehicle apparatus ECU 20 that can input an operation signal from the ignition starter 9, the operator operates the touch position on the touch panel 7 corresponding to the FM radio 11 based on the display on the touch panel display 8. Then, a predetermined operation signal is output to the FM radio 11 to activate the FM radio 11.

  Similarly, the operation position corresponding to the CD (compact disc) player 12 by the operator, the operation position corresponding to the HDD (hard disk) player 13, the operation position corresponding to the television 14, the operation position corresponding to the AM radio 15, the air conditioner 16, when the operation position corresponding to the car navigation 17 is touched, the in-vehicle device ECU 20 outputs predetermined operation signals to the CD player 12, the HDD player 13, the television 14, the AM radio 15, the air conditioner 16, and the car navigation 17, respectively. And start them.

  Further, the in-vehicle device ECU 20 can output a control signal to the motor drive circuit 18 and drives the motor 19 for operating the lifting mechanism based on the control signal.

  FIG. 3 is a perspective view showing a storage state and a protruding state of the display monitor 5 according to the present embodiment, and FIG. 3A shows a storage state in which the display monitor 5 is stored in the instrument panel 4. ing. In this state, the display monitor 5 is housed so as to form a substantially continuous surface with the upper surface of the instrument panel 4 as shown.

  3B and 3C show a state in which the upper portion of the display monitor 5 protrudes from the upper surface of the instrument panel 4 (hereinafter referred to as a first protruding state), and the display monitor 5 respectively. Is shown in a state of projecting from the upper surface of the instrument panel 4 (hereinafter referred to as a second projecting state), and these display monitors are output by the output of the control signal of the in-vehicle device ECU 20 shown in FIG. 5 can be switched between the storage state and the first and second protruding states.

  FIG. 4 is a front view showing a display example of the display monitor 5. The display monitor 5 is continuous with the upper display region 51 in a strip shape, with the upper region protruding from the upper surface of the instrument panel 4 in the first protruding state as one display region, And a lower display area 52 having the remaining lower area as another display area. In the present embodiment, the display monitor 5 is configured by a single display panel, and the two display areas are partitioned by display control of the in-vehicle device ECU 20.

  The upper display area 51 has a horizontally extending band shape. As shown in FIGS. 4A and 4B, information on the temperature, time, and the operating state of the air conditioner 16 is mainly displayed as characters, icons, and the like. Is displayed. In FIG. 4, reference numerals 51 a to 51 f denote numbers indicating set temperatures (indicated by Fahrenheit in the figure), icons indicating the re-search mode, icons indicating air blowing locations, icons indicating the air conditioning setting level, and numbers indicating the outside air temperature ( In the figure, a number indicating the time is displayed.

  As described above, by providing the display monitor 5 with the upper display area 51 and the lower display area 52, it is possible to eliminate the dedicated display for displaying characters, icons, etc., which has been conventionally attached to the surface of the instrument panel 4. it can. Therefore, the surface area of the instrument panel 4 can be reduced correspondingly, and as a result, the cost can be reduced.

  In the present embodiment, if the operation of the ignition starter 9 is not performed (if the ignition starter 9 is in an engine stop state in which the accessory is turned off), the display monitor 5 is in the storage state of FIG. It has become so.

  When the ignition starter 9 is rotated to any one of the accessory ON, the ignition ON, and the ignition START, the display monitor 5 enters the first projecting state as shown in FIGS. 3B and 4A. First, a display state (hereinafter, referred to as an upper display area display mode) in which only the upper display area 51 is exposed on the upper surface of the instrument panel 4 and is visually recognized by the occupant is set. Hereinafter, any state of the accessory ON, the ignition ON, and the ignition START is referred to as an operation state of the ignition starter 9, and operating to the operation state is referred to as an operation operation of the ignition starter 9.

  As described above, when the engine is not operated when the ignition starter 9 is not operated, the retracted state is set, and when the ignition starter 9 is operated, the first start state is switched. The operating state of the vehicle 1 including the on state of the power train that can be driven can be visually recognized.

  Here, the on state of the powertrain of the vehicle 1 can be recognized by using engine sound. However, in recent years, in order to improve fuel efficiency, a device having a function of automatically stopping idling at the time of a temporary stop such as waiting for a signal has been proposed. In such a form, an engine sound is emitted at the time of temporary stop. Because it disappears, it may be difficult to recognize by hearing alone. In this embodiment, even in such a case, it is possible to reliably recognize the power train on state of the vehicle 1 based on the presence or absence of the protrusion of the display monitor 5.

  On the other hand, the lower display area 52 can display an image arbitrarily generated by a combination of many pixels. Specifically, the lower display area 52 is used when devices such as the HDD player 13, the television 14, and the car navigation system 17 that mainly display moving images are used. FIG. 4B shows a state where the car navigation 17 is used, and the illustrated one displays the map information M as the navigation information.

  In the present embodiment, when the vehicle 1 is in an operating state, an on-board device (in this case, the HDD player 13, the television 14, and the car navigation 17) in which the occupant displays the state or information in the lower display area 52 in the operation panel unit 6. 3), the display monitor 5 is switched to the second projecting state as shown in FIG. 3C and FIG. 4B by the control signal of the in-vehicle device ECU 20, Both the display area 51 and the lower display area 52 are exposed and are in a display state (hereinafter referred to as a split display mode) that allows the occupant to visually recognize the display area 51 and the lower display area 52.

  The first protrusion that exposes only the upper display area 51 on the upper surface of the instrument panel 4 until the occupant operates any of the HDD player 13, the television 14, and the car navigation 17 on the operation panel unit 6. The state remains in the upper display area display mode. As a result, only the part necessary for displaying the information required by the occupant (driver) can be projected from the upper surface of the instrument panel 4, so that the front view is wasted by the display monitor. Without obstruction, the necessary information can be obtained immediately if the occupant gazes at the display monitor.

  Hereinafter, the display control processing of the information display device executed by the in-vehicle device ECU 20 will be described with reference to the flowchart of FIG.

  First, the vehicle-mounted device ECU 20 determines whether or not the ignition starter 9 is in an activated state by a rotation operation of the ignition starter 9 (step s1). When the ignition starter 9 is in an activated state (step s1: YES), the HDD player 13, It is determined whether or not predetermined on-vehicle devices such as the television 14 and the car navigation system 17 are in operation (step s2).

  Here, the vehicle-mounted device ECU 20 outputs a control signal to the display monitor 5 to enter the upper display area display mode if the predetermined vehicle-mounted device is not in an operating state, that is, is in an OFF state (step s2: NO). At the same time (step s3), a control signal is also output to the motor drive circuit 18, and the display monitor 5 is driven into the first protruding state by driving the motor 19 (step s4).

  On the other hand, in step s2, when the predetermined vehicle-mounted device is in an operating state (step 2s: YES), the vehicle-mounted device ECU 20 outputs a control signal to the display monitor 5 to enter the split display mode (step s5). A control signal is output to the motor drive circuit 18, and the display monitor 5 is brought into the second protruding state by driving the motor 19 (step s6).

  When the protruding state of the display monitor 5 is switched in step s4 or step s6, the in-vehicle device ECU 20 causes the display monitor 5 to display the state or information according to the display mode set in advance in step s3 or step s5 (step s7). Here, in the split display mode, only the state or information corresponding to the in-vehicle device operated on the operation panel 6 is displayed.

  In step s1, when the ignition starter 9 is not in the operating state (step s1: NO), the in-vehicle device ECU 20 does not output a control signal to the motor drive circuit 18 and maintains the housed state (step s8) The process is returned.

  Further, in step s1, it is also determined whether or not the accessory OFF operation has been performed by the rotation operation when the operation state has already been set, that is, whether or not the engine stop operation has been performed from the operation state. The When the accessory OFF operation is performed (step s1: NO), the process proceeds to step s8, where the in-vehicle device ECU 20 outputs a control signal to the motor driving device 18, and the display monitor 5 is driven by the motor 19 to the first protrusion. The display monitor 5 in the state or the second protruding state is switched to the housed state, and the process is returned.

  As a result, when the engine start operation after the engine start operation is not performed in the ignition starter 9, the display monitor 5 can be always stored. Therefore, compared with the case where it is always in a protruding state when not in use, it is possible to reliably prevent the influence of direct sunlight on the display monitor 5, damage to the display monitor 5 by a thief, theft, etc., and The occupant can visually recognize the engine stop state, that is, the power train off state and the vehicle 1 cannot be driven.

  By the way, the effect of visually recognizing the operating state is particularly advantageous in the hybrid vehicle that travels by using the electric motor (motor) 101 and the engine 102 as shown in FIG. It becomes remarkable when equipped with.

  FIG. 6 is a block diagram showing a mechanical configuration of the hybrid electric vehicle. As a power unit for generating driving force, an electric motor (motor) 101 that generates driving force by power supplied from the battery 103, gasoline, and the like It travels with the engine 102 that generates driving force by an internal combustion engine that uses the explosive power of the fuel, and travels with only the motor 101, travels with only the engine 102, or with the motor 101, depending on the travel state of the vehicle. Traveling by both of the engines 102 is realized.

  The engine 102 transmits a driving force to the automatic transmission 106 by engaging the clutch 105 via the torque converter 104. The automatic transmission 106 converts the driving force input from the engine 102 into a predetermined torque and rotational speed in accordance with the traveling state (or by the driver's operation), and passes through the gear train 107 and the differential mechanism 108. This is transmitted to the drive wheels 109 and 110. The engine 102 also drives a generator 110 to charge the battery 103.

  The ECU 10 in FIGS. 2 and 6 is a control unit for controlling such a hybrid electric vehicle. The ECU 10 includes a CPU, a ROM, a RAM, an inverter, and the like, and the engine 102 determines the ignition timing and the fuel injection amount. The motor 101 controls charging of the battery 103, output voltage, and the like.

  Here, when starting and running at a low speed, the ECU 10 may drive only the motor 101, and the driving force of the motor 101 is transmitted to the drive wheels 109 and 110 via the gear train 107. For this reason, at the time of starting and running at a low speed, a driving sound such as an engine sound at the time of driving the engine 102 is not generated, and it becomes difficult for the occupant to visually recognize the on state of the power train. However, by mounting the information display device of the present invention, it is possible to always visually recognize the on-state of the powertrain based on whether the display monitor 5 is protruding.

  By the way, when displaying an image arbitrarily generated by a combination of a number of pixels on the display monitor 5, especially when enjoying viewing of a video, such as when enjoying viewing of a television image, a larger screen display is possible. It is preferable to do. Therefore, in the present invention, it is not necessarily limited to the split display mode in the second protruding state as in the above-described embodiment. For example, when operating a predetermined vehicle-mounted device such as the television 14, the full-screen display state (hereinafter referred to as the following) is switched to the second projecting state and the upper display area 51 and the lower display area 52 are combined as in the display example shown in FIG. The television image T may be displayed as a full screen display mode).

  Hereinafter, another display control process of the information display device executed by the in-vehicle device ECU 20 will be described with reference to the flowchart of FIG. In the description of FIG. 8, the same reference numerals as those in the first embodiment described above are used.

  Steps s11 and s12 in the flowchart shown in FIG. 8 correspond to steps s1 and s2 in the flowchart shown in FIG. In the display control according to the present embodiment, the in-vehicle device ECU 20 determines whether or not the television 14 is in an operating state in step s13.

  Here, when the television 14 is in an operating state (step s13: YES), the control signal is output to the display monitor 5 to set the full screen display mode to display the television image T shown in FIG. 7 (step s14). If the television 14 is not in the operating state, that is, if it is in the OFF state (step s13: NO), the divided display mode is set (step s15) as in step s5 in FIG. When these display modes are set, the display monitor 5 is brought into the second protruding state by driving the motor 19 (step s16), as in step s6 of FIG.

  Here, in step s12, if the predetermined device (here, any of HDD player 13, television 14, or car navigation 17) is not in operation in operation panel unit 6 (step 12s: NO), Proceeding to steps s17 and s18, the in-vehicle apparatus ECU 20 sets the first display state by driving the motor 19 as well as the upper display area display mode as in steps s3 and s4 of FIG.

  When the projecting state of the display monitor 5 is switched in step s16 or s18, the in-vehicle device ECU 20 causes the display monitor 5 to display the state or information in accordance with the display mode preset in step s14, s15 or step s17 ( Step s19).

  In step s11, when the ignition starter 9 is not in the operating state, or when the accessory is turned off by the rotating operation when the ignition starter 9 is already in the operating state (step s11: NO), the in-vehicle device The ECU 20 places the display monitor 5 in the housed state (step s20) and returns the process.

  In FIG. 8, the case where the full screen display mode is set has been described for the television 14. However, the present invention is not necessarily limited to this. For example, a video stored in a storage medium such as a DVD is viewed. Thus, the full screen display mode may be set when a predetermined operation is performed.

In correspondence between the configuration of the present invention and the above-described embodiment,
The engine starting means of the present invention corresponds to the ignition starter 9,
Similarly,
The in-vehicle device whose status or information is displayed in the lower display area corresponds to the HDD player 13, the television 14, and the car navigation 17,
The present invention is not limited only to the configuration of the above-described embodiment, and many embodiments can be obtained.

FIG. 2 is a front perspective view of the interior of the instrument panel incorporating the information display device according to the present embodiment. The control block diagram for performing the display control process of the information display apparatus which concerns on this embodiment. The perspective view which shows the accommodation state and protrusion state of the display monitor 5 which concern on this embodiment. The front view which shows the example of a display of a display monitor. The flowchart which shows the display control process of the information display apparatus performed by vehicle equipment ECU. The block diagram which shows the mechanical structure of a hybrid electric vehicle. The front view which shows another example of a display of a display monitor. The flowchart which shows the display control process of the information display apparatus performed by the vehicle-mounted apparatus ECU which concerns on another embodiment of this invention.

Explanation of symbols

4 ... Instrument panel 5 ... Display monitor 9 ... Ignition starter 13 ... HDD player 14 ... Television 17 ... Car navigation 101 ... Motor 102 ... Engine

Claims (4)

A display monitor that displays the status or information of the in-vehicle device of the car is placed on the instrument panel,
An automobile information display device capable of switching between a protruding state in which the display monitor protrudes from the upper surface of the instrument panel and a storage state in which the display monitor is stored in the instrument panel. And
The display monitor has an upper display area and a lower display area continuous to the lower portion of the upper display area,
Switching between a first protruding state in which only the upper display area is exposed on the upper surface of the instrument panel and allowing the occupant to visually recognize, and a second protruding state in which both the upper display area and the lower display area are exposed and visually recognized by the occupant As well as
When the engine is stopped, the display monitor is stored to form a substantially continuous surface with the top surface of the instrument panel.
A vehicle information display device that switches to the first projecting state when the engine starting means is operated and switches to the second projecting state when operating the vehicle-mounted device whose status or information is displayed in the lower display area. 2. The information display apparatus for an automobile according to claim 1, wherein when the engine is stopped from the operating state of the engine starting means, the display monitor is switched from the first protruding state or the second protruding state to the stored state. When the predetermined on-vehicle device is operated, the image is switched to the second projecting state, and an image arbitrarily generated by combining a large number of pixels is displayed on the entire screen including the upper display area and the lower display area of the display monitor. The information display device for a car according to claim 1 or 2, wherein the information is displayed. The information display apparatus for an automobile according to any one of claims 1 to 3, which is mounted on a hybrid vehicle that travels using both an electric motor that generates driving force by electric power and an engine that generates driving force by an internal combustion engine.

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