JP2012058194A - Navigation device, driving switching method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique for preventing a decrease in function quality due to engine sound when inputting and outputting a voice in a hybrid vehicle.SOLUTION: A navigation device 100 installed in a vehicle equipped with a first driving device 211 which drives the vehicle through engine driving and a second driving device 212 which drives the vehicle through electric driving includes a condition determination part which determines whether predetermined conditions for inputting and outputting a voice in the vehicle are met, and a driving management part which controls the first driving device 211 and second driving device 212 according to a determination result of the condition determination part, and the driving management part stops the engine driving by the first driving device when the condition determination part determines that the predetermined conditions are met.

Description

  The present invention relates to a navigation device, a drive switching method, and a program.

  In recent years, hybrid vehicles having two different power sources (for example, engine drive and electric drive) have become widespread.

  Some navigation devices used in hybrid vehicles have a function that requires voice input / output, such as voice recognition and hands-free calling (for example, Patent Document 1).

JP 2000-066667

  However, due to the engine sound based on the engine drive of the hybrid vehicle, voice recognition may fail or the quality of hands-free calling may be degraded.

  An object of the present invention is to provide a technique for preventing deterioration in functional quality due to engine sound when performing voice input / output in a hybrid vehicle.

  The present invention for solving the above problems is a navigation device installed in a vehicle, comprising: a first drive device that drives the vehicle by engine drive; and a second drive device that drives the vehicle by electric drive. A condition determining unit that determines whether or not a predetermined condition for performing voice input / output in the vehicle is satisfied, and the first driving device and the second according to a determination result by the condition determining unit A drive management unit that controls the drive device, and the drive management unit stops the first drive device when the condition determination unit determines that the predetermined condition is satisfied. .

1 is a schematic configuration diagram of a navigation system to which an embodiment of the present invention is applied. It is a figure which shows the schematic data structure of map data. It is a functional block diagram of an arithmetic processing part. It is a flowchart which shows the outline | summary of a drive switching process.

  Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic configuration diagram of a navigation system 50 to which an embodiment of the present invention is applied. As shown in the figure, the navigation system 50 includes a navigation device 100, a drive system control device 200, a drive system 210, and a battery 220.

  The navigation device 100 is a device (a so-called navigation device) that displays map information and guides a route indicating a current location of the navigation device 100 and a set destination.

  As illustrated, the navigation device 100 includes an arithmetic processing unit 1, a display 2, a storage device 3, a voice input / output device 4 (microphone 41, speaker 42), a communication device 5, and an input device 6 (touch panel 61). , Dial switch 62), vehicle speed sensor 7, gyro sensor 8, and GPS receiver 9.

  The arithmetic processing unit 1 is a central unit that performs various processes. For example, the arithmetic processing unit 1 includes a CPU (Central Processing Unit) 21 that executes various processes such as numerical calculation and control of each device, and a RAM (Random) that stores map data, arithmetic data, and the like read from the storage device 3. (Access Memory) 22, ROM (Read Only Memory) 23 for storing programs and data, and I / F (interface) 24 for connecting various types of hardware to the arithmetic processing unit 1. The arithmetic processing unit 1 has a configuration in which devices are connected to each other via a bus 25. And each function part (101-106) mentioned later is implement | achieved when CPU21 runs the program read to memory, such as RAM22.

  For example, the arithmetic processing unit 1 calculates the current location based on information output from the vehicle speed sensor 7, the gyro sensor 8, and the GPS receiver 9. Further, map data necessary for display is read out from the storage device 3 based on the obtained current location information. Further, the read map data is developed in graphic form, and a mark indicating the current location is superimposed on the map data and output to the display 2. In addition, using the map data stored in the storage device 3, an optimum route (hereinafter referred to as "recommended") that connects the departure point or current location instructed by the user with the destination (or via-point or stop-by point). Search for “route”. In addition, guidance information for guiding the user is generated using the speaker 42 or the display 2 of the voice input / output device 4, and the generated guidance information is output to the speaker 2 on the speaker 42.

  The display 2 includes a screen for displaying characters and images, and is a unit that displays graphics information generated by the arithmetic processing unit 1 and the like on the screen. The display 2 includes a liquid crystal display, an organic EL (Electro-Luminescence) display, and the like.

  The storage device 3 is a device that stores various types of information. The storage device 3 is composed of at least a readable / writable storage medium such as an HDD (Hard Disk Drive) or a nonvolatile memory card. In this storage medium, for example, map data 310 necessary for a normal route search is stored.

  FIG. 2 is a diagram illustrating a schematic data structure of the map data 310. As shown in the figure, the map data 310 includes link data 320 of each link constituting the road included in the mesh area for each mesh identification code (mesh ID) 311 that is a partitioned area on the map. Contains.

  For each link identification code (link ID) 321, link data 320 includes coordinate information 322 of two nodes (start node and end node) constituting the link, road type 323 indicating road type information including the link, link Link length information 324 indicating the length of the link, link travel time 325, link identification code (connection link ID) 326 for connecting to each of the two nodes, a point for switching from electric drive to engine drive (hereinafter referred to as "engine drive point") And so on). Here, by distinguishing the start node and the end node for the two nodes constituting the link, the upward direction and the downward direction of the road can be managed as different links. The map data 310 stores drawing data for displaying roads and facilities in the map display.

  Returning to FIG. The voice input / output device 4 includes a microphone 41 as a voice input device and a speaker 42 as a voice output device. The microphone 41 acquires voices and the like emitted from the driver and other passengers. The speaker 42 outputs voice information such as a message to the user generated by the arithmetic processing unit 1 as voice. The microphone 41 and the speaker 42 are separately arranged at predetermined parts of the vehicle. However, it may be housed in an integral housing. The navigation device 100 can include a plurality of microphones 41 and speakers 42.

  The communication device 5 communicates with the nearest base station based on a wireless communication method such as WCDMA (Wideband-Code Division Multiple Access) or PHS (Personal Handyphone System). The navigation device 100 transmits and receives data necessary for a call (hands-free call) via the communication device 5 and the base station.

  The input device 6 is a unit that receives instructions from the user. The input device 6 includes a touch panel 61, a dial switch 62, and other hardware switches (not shown) such as scroll keys and scale change keys. In addition, the input device 6 includes a remote controller that can perform operation instructions to the navigation device 100 remotely. The remote controller includes a dial switch, a scroll key, a scale change key, and the like, and can send information on operation of each key or switch to the navigation device 100.

  The touch panel 61 is a transparent operation panel mounted on the display surface side. The touch panel 61 specifies a touch position corresponding to the XY coordinates of the image displayed on the display 2, converts the touch position into coordinates, and outputs the coordinate. The touch panel 61 includes a pressure-sensitive or electrostatic input detection element.

  The dial switch 62 is configured to be rotatable clockwise and counterclockwise, generates a pulse signal for every rotation of a predetermined angle, and outputs the pulse signal to the arithmetic processing unit 1. The arithmetic processing unit 1 obtains the rotation angle of the dial switch 62 from the number of pulse signals.

  The vehicle speed sensor 7, the gyro sensor 8, and the GPS receiver 9 are used by the navigation device 100 to calculate the current location, that is, the vehicle position. The vehicle speed sensor 7 is a sensor that outputs vehicle speed data used for calculating the vehicle speed. The gyro sensor 8 is configured by an optical fiber gyro, a vibration gyro, or the like, and is a sensor that detects an angular velocity due to rotation of a moving body. The GPS receiver 9 receives a signal from a GPS satellite, and measures the distance between the mobile body and the GPS satellite and the rate of change of the distance with respect to three or more satellites. , And measure the heading.

  As shown in the figure, the drive system 210 includes a first drive device 211 and a second drive device 212, and drives the moving body (own vehicle) by one of the two different power sources. . For example, the first drive device 211 drives a moving body (own vehicle) with an engine (hereinafter also referred to as “engine drive”). On the other hand, the second drive device 212 drives the moving body (own vehicle) with electric power (for example, a motor) (hereinafter also referred to as “electric drive”).

  The battery 220 supplies power to the entire navigation system 50. The battery 220 is assumed to be a chargeable / dischargeable secondary battery such as a lithium ion polymer battery, a lithium ion battery, or various secondary batteries such as a nickel metal hydride battery or a nickel cadmium battery. However, the present invention is not limited to this, and a primary battery or other power source may be used.

  As shown in the figure, the drive system control apparatus 200 includes a control unit 201 and a driving support system 202, and controls the drive system 210 and the battery 220.

  The control unit 201 switches between driving by the first driving device 211 and driving by the second driving device 212 based on an instruction from the navigation device 100. For example, when the control unit 201 receives an instruction from the navigation device 100 to switch from driving by the first driving device 211 to driving by the second driving device 212, the control unit 201 drives the first driving device 211. An instruction to stop is notified, and an instruction to start driving is notified to the second driving device 212. On the other hand, when receiving an instruction from the navigation device 100 to switch from driving by the second driving device 212 to driving by the first driving device 211, the control unit 201 drives the second driving device 212. An instruction to stop is notified, and an instruction to start is notified to the first driving device 211.

  In addition, the control unit 201 acquires information indicating the state of the battery 220 (for example, the remaining battery level) in response to a request from the navigation device 100. Then, the control unit 201 sends information acquired from the battery 220 to the navigation device 100.

  The driving support system 202 supports driving of the moving body (own vehicle) by the driver. For example, the driving support system 202 includes an ACC (Adaptive Cruise Control) for controlling the inter-vehicle distance from the preceding vehicle, a navigation COP (Curve Over Prevention) for suppressing excessive speed on a curve, and a lane (lane) drawn on the road surface. ), And a function such as a lane keeping system for additional steering so that the vehicle can travel along the vehicle. Note that when the driving support system 202 is operated, it is possible to suppress the power consumption due to the driving operation of the driver as compared with the case where the driving support system 202 is not operated.

  FIG. 3 is a functional block diagram of the arithmetic processing unit 1. As shown in the figure, the arithmetic processing unit 1 includes a basic control unit 101, an input reception unit 102, an output processing unit 103, a voice recognition control unit 104, a hands-free control unit 105, and a drive management unit 106. Have.

  The basic control unit 101 is a functional unit that performs various processes, and controls other functional units (102 to 106) according to the processing content. In addition, information is acquired from the various sensors 7 and 8, the GPS receiver 9, etc., and the current location is calculated by performing map matching processing and the like. In addition, the travel history is stored in the storage device 3 for each link by associating the travel date and time with the position as needed. Further, in response to a request from each function unit (102 to 106), the current time included in the GPS information received by the GPS receiver 9 is output. In addition, when the basic control unit 101 requests information on recommended routes from other function units (102 to 106), the basic control unit 101 outputs the information.

  In addition, the basic control unit 101 uses the map data 310 to search for an optimal route (recommended route) that connects the departure point or current location and the destination. In the route search, a route is searched based on a link cost set in advance for a predetermined section (link) of a road using a route search logic such as Dijkstra method. Note that the basic control unit 101 may search using the link cost included in the statistical information corresponding to the arrival date / day type predicted based on the current date / time during the route search.

  In addition, the basic control unit 101 generates guidance information based on the recommended route so that the current location of the navigation device 100 (host vehicle) does not deviate from the recommended route, and outputs the guidance information to the output processing unit 103.

  The input reception unit 102 receives an instruction from the user input via the input device 6 or the microphone 41, and outputs the received request content to the basic control unit 101 so that processing corresponding to the request content is executed. To do. For example, when the user requests to search for a recommended route, the received recommended route search request is output to the basic control unit 101.

  For example, the output processing unit 103 receives screen information to be displayed, converts it into graphics information for drawing on the display 2, and instructs the display 2 to draw. Also, an instruction to output audio information from the speaker 42 is given according to the processing content.

  The voice recognition control unit 104 recognizes voice input from the user via the microphone 41. For example, when a voice instruction is input to the input reception unit 102, the voice recognition control unit 104 recognizes the voice input to the input reception unit 102, identifies the instruction content, and notifies the input reception unit 102. .

  The hands-free control unit 105 controls a hands-free call. Here, the hands-free call includes, for example, a function in which a user makes a call without holding a handset or the like. When a voice is input via the microphone 41, the hands-free control unit 105 converts the input voice into a data format necessary for wireless communication, and transmits the data to the nearest base station via the communication device 5. On the other hand, when receiving data from the nearest base station via the communication device 5, the hands-free control unit 105 converts the received data into a signal necessary for voice output and outputs the signal via the speaker 42.

  The drive management unit 106 determines whether or not a predetermined condition for performing voice input / output in the vehicle is satisfied, and according to the determination result, the first drive device 211, the second drive device 212, and the like. Is output to the drive system controller 200. Specifically, when it is determined that a predetermined condition for performing voice input / output in the vehicle is satisfied, the drive management unit 106 performs the second drive from the drive by the first drive device 211. An instruction to switch to driving by the device 212 is output to the drive system control device 200.

  Here, the predetermined conditions include, for example, usage statuses of voice recognition by the voice recognition control unit 104 and call control by the hands-free control unit 105. For example, the drive management unit 106 determines whether or not at least one of voice recognition by the voice recognition control unit 104 and control of a call by the hands-free control unit 105 is being used. If determined, an instruction to switch from driving by the first driving device 211 to driving by the second driving device 212 is output to the drive system control device 200.

  However, when the charge / discharge state of the battery 220 does not satisfy a certain condition, for example, when the remaining amount of electricity in the battery 220 is less than a specified amount, the drive management unit 106 drives by the first drive device 211. The instruction to switch to driving by the second driving device 212 is not output.

  Further, the drive management unit 106 is a condition in which at least one of voice recognition by the voice recognition control unit 104 and call control by the hands-free control unit 105 is in use and the charge / discharge state of the battery 220 is constant. Is not satisfied (for example, when the remaining amount of electricity in the battery 220 is less than a specified amount), an instruction to switch from driving by the second driving device 212 to driving by the first driving device 211 is issued. Output to the control device 200.

  Further, the drive management unit 106 is a condition in which at least one of voice recognition by the voice recognition control unit 104 and call control by the hands-free control unit 105 is in use and the charge / discharge state of the battery 220 is constant. In the case of satisfying (for example, when the remaining amount of electricity in the battery 220 is equal to or greater than a specified amount), an instruction to switch from driving by the first driving device 211 to driving by the second driving device 212 is given. Output to drive system controller 200.

  Further, when notifying the surroundings that the host vehicle exists, the drive management unit 106 gives an instruction to the drive system control device 200 to switch from driving by the second driving device 212 to driving by the first driving device 211. Output.

  Each component described above is classified according to main processing contents in order to facilitate understanding of the configuration of the navigation system 50. The invention of the present application is not limited by the way of classifying the components or their names. The configuration of the navigation system 50 can be classified into more components depending on the processing content. Moreover, it can also classify | categorize so that one component may perform more processes.

  Moreover, each function part (101-106) may be constructed | assembled by hardware (ASIC etc.). Further, the processing of each functional unit may be executed by one hardware, or may be executed by a plurality of hardware.

  Next, a characteristic operation of the navigation system 50 configured as described above will be described.

<Drive switching process>
FIG. 4 is a flowchart showing an outline of the “drive switching process” performed by the drive management unit 106 of the navigation device 100.

  For example, the drive management unit 106 starts this flow at the timing when the navigation apparatus 100 is turned on or when the drive system 210 is started.

  When this flow is started, the drive management unit 106 acquires information regarding the in-vehicle state of the vehicle provided with the navigation device 100 (step S101).

  For example, in step S101, the drive management unit 106 uses information indicating whether or not a function requiring voice input / output is in use as a predetermined function unit (for example, the voice recognition control unit 104 or the hands-free control). Part 105).

  In addition, the drive management unit 106 acquires information indicating the remaining amount of electricity in the battery 220. Specifically, the drive management unit 106 requests the drive system control device 200 for information indicating the remaining amount of electricity in the battery 220. At this time, the drive system control device 200 acquires information indicating the remaining amount of electricity from the battery 220 and sends it to the drive management unit 106. Thus, the drive management unit 106 can acquire information indicating the remaining amount of electricity in the battery 220.

  Further, the drive management unit 106 acquires information for determining whether or not to inform the surroundings that the own vehicle exists. Specifically, the drive management unit 106 identifies the link ID 321 where the host vehicle exists based on the current location calculated by the basic control unit 101. Then, the drive management unit 106 acquires the engine drive point 327 associated with the identified link ID 321. It is assumed that the engine drive point 327 is not associated with the link ID 321 that does not need to inform the surroundings that the own vehicle exists.

  Next, the drive management unit 106 determines whether or not a function that requires voice input / output (for example, at least one of voice recognition and hands-free calling) is in use (step S102). Specifically, when the drive management unit 106 acquires information indicating that a function that requires voice input / output is being used from the voice recognition control unit 104 in step S101, the drive management unit 106 does not input voice. It is determined that a function that requires output is in use. Similarly, when information indicating that a function requiring voice input / output is being used is acquired from the hands-free control unit 105 in step S101, the function requiring voice input / output is used. It is determined that it is in the middle. On the other hand, the drive management unit 106 has not acquired information indicating that a function requiring voice input / output is being used from either the voice recognition control unit 104 or the hands-free control unit 105 in step S101. In this case, it is determined that a function that requires voice input / output is not being used.

  If the drive management unit 106 determines that a function that requires input / output of audio is being used (step S102; Yes), the process proceeds to step S103.

  When the process proceeds to step S103, the drive management unit 106 determines whether the remaining amount of electricity in the battery 220 is equal to or greater than a specified value (step S103). Specifically, the drive management unit 106 determines by comparing the remaining amount of electricity of the battery 220 acquired in step S101 with a specified value stored in advance in the storage device 3 or the like.

  Here, when the remaining amount of electricity of the battery 220 acquired in step S101 is equal to or greater than a specified value (step S103; Yes), the drive management unit 106 drives by the second drive device 212 (for example, electric drive). ) Is output to the drive system controller 200 (step S104). Of course, when the vehicle has already been driven by the second drive device 212 at the time when the process proceeds to step S104, drive switching is not performed and the drive by the second drive device 212 is maintained. That is, the drive management unit 106 does not output any instruction to the drive system control device 200.

  Further, the drive management unit 106 does not perform drive switching when it should inform the surroundings that the host vehicle is present even if the predetermined condition for inputting / outputting audio within the vehicle is satisfied. That is, in step S104, the drive management unit 106 is using a function that requires voice input / output (for example, at least one of voice recognition and hands-free calling), and the remaining amount of electricity in the battery 220 is low. Even when the engine driving point 327 has been acquired in step S101 even if it is equal to or greater than the specified value, an instruction to switch to driving (for example, electric driving) by the second driving device 212 is given. Does not output to 200. Of course, if the vehicle is being driven by the second driving device 212 at the time when the process proceeds to step S104, an instruction to switch to driving (for example, engine driving) by the first driving device 211 is given to the drive system. Output to the control device 200.

  When the process of step S104 is completed, the drive management unit 106 ends this flow. The drive system control device 200 (control unit 201) that has received the instruction to switch the drive in step S104 notifies the first drive device 211 of an instruction to stop the drive, and the second drive device 212. To give instructions to start driving.

  On the other hand, when the drive management unit 106 determines in step S102 that the voice recognition function is not being used (step S102; No), or when the remaining power of the battery 220 acquired in step S101 is less than the specified value. (Step S103; No), the process proceeds to Step S105.

  When the process proceeds to step 105, the drive management unit 106 outputs an instruction to switch to driving (for example, engine driving) by the first driving device 211 to the driving system control device 200 (step S105). Of course, when the vehicle has already been driven by the first drive device 211 at the time when the process proceeds to step S105, the drive switching is not performed and the drive by the first drive device 211 is maintained. That is, the drive management unit 106 does not output any instruction to the drive system control device 200.

  Then, the drive management unit 106 ends this flow. The drive system control device 200 (control unit 201) that has received the instruction to switch the drive in step S105 notifies the second drive device 212 of an instruction to stop the drive, and the first drive device 211 is instructed. To give instructions to start driving.

  When the drive management unit 106 performs the above processing, the navigation device 100 according to the present embodiment can prevent deterioration in functional quality due to engine sound when voice input / output is performed in the hybrid vehicle.

  In addition, when the remaining amount of electricity in the battery 220 is less than the specified value, the driving by the first driving device 211 (for example, engine driving) is prevented, so that it is possible to prevent the driving stop due to the insufficient amount of remaining electricity in the battery 220. it can.

  In addition, even when a predetermined condition for performing voice input / output in the vehicle is satisfied, if the surrounding vehicle should be notified to the surroundings, driving by the first driving device 211 (for example, an engine) Driving), it is possible to notify the surrounding pedestrians and the like that the vehicle is passing by engine sound in a specific area (for example, the vicinity of a house or a point with poor visibility). As a result, the occurrence of an accident based on the quietness of driving by the second driving device 212 can be prevented.

  Each processing unit of the above-described flow is divided according to main processing contents in order to facilitate understanding of the processing of the navigation device 100. The invention of the present application is not limited by the method of classification of the processing steps and the names thereof. The processing performed by the navigation device 100 can be divided into more processing steps. One processing step may execute more processes.

  Moreover, said embodiment intends to illustrate the summary of this invention, and does not limit this invention. Many alternatives, modifications, and variations will be apparent to those skilled in the art.

  Below, the modification of the said embodiment is given.

  For example, in the above embodiment, the drive switching process (the above flow) is started at the timing when the navigation apparatus 100 is turned on or when the drive system 210 is started. However, the present invention is not limited to this. For example, the drive switching process (the above flow) may be repeatedly executed at a predetermined interval (for example, 10 seconds).

  As a result, the drive management unit 106 determines that the charge / discharge state of the battery 220 is constant (for example, the remaining amount of electricity is specified) at the timing when the navigation device 100 is turned on or the drive system 210 is started. If the charge / discharge state of the battery 220 does not satisfy a certain condition, the first drive device 211 (for example, the engine) can be started.

  Further, by repeatedly executing the drive switching process (the above flow), even if it is determined that the charge / discharge state of the battery 220 does not satisfy a certain condition (for example, the remaining amount of electricity is equal to or greater than a specified value) Thereafter, when the charging / discharging state of the battery 220 satisfies a certain condition, driving from the first driving device 211 (for example, engine driving) to driving by the second driving device 212 (for example, electric driving). You can switch to

  In addition, when the driving management unit 106 is switched to driving (for example, engine driving) by the first driving device 211 (including the case where the first driving device 211 is activated), the driving support system described above. 202 may be operated. Thereby, useless consumption of electricity by the driving of the driver can be suppressed. Note that when the driving support system 202 is operated, the drive management unit 106 may inquire the user whether the driving support system 202 may be operated.

  In addition, prior to the drive switching in steps S104 and S105 of the above flow, the drive management unit 106 may inquire the user whether the drive may be switched.

  Moreover, in the said embodiment, although the drive switching process (the said flow) is made to perform the drive management part 106 of the navigation apparatus 100, this invention is not limited to this. For example, the drive switching process (the above flow) may be executed by the control unit 201 of the drive system control device 200.

  DESCRIPTION OF SYMBOLS 1 ... Arithmetic processing part, 2 ... Display, 3 ... Storage device, 4 ... Voice input / output device, 5 ... Communication device, 6 ... Input device, 7 ... Vehicle speed sensor , 8 ... Gyro sensor, 9 ... GPS receiver, 21 ... CPU, 22 ... RAM, 23 ... ROM, 24 ... Interface (I / F), 41 ... Microphone 42 ... Speaker 61 ... Touch panel 62 ... Dial switch 100 ... Navigation device 101 ... Basic control unit 102 ... Input accepting unit 103 ... Display processing unit 104 ... voice recognition control unit, 310 ... map data, 311 ... mesh ID, 320 ... link data, 321 ... link ID, 322 ... start node / end node, 323 ... ..Road type, 24 ... link length, 325 ... link travel time, 326 ... start connecting link and end connection link, 327 ... engine driving point

Claims (11)

A navigation device installed in a vehicle, comprising: a first drive device that drives the vehicle by engine drive; and a second drive device that drives the vehicle by electric drive,
A condition determination unit for determining whether or not a predetermined condition for performing voice input / output in the vehicle is satisfied;
A drive management unit that controls the first drive device and the second drive device according to a determination result by the condition determination unit;
The drive management unit
When the condition determining unit determines that the predetermined condition is satisfied, the state is switched to only the second driving device.
A navigation device characterized by that. The navigation device according to claim 1,
A voice recognition unit that recognizes the input voice;
A hands-free control unit for controlling a hands-free call;
The condition determination unit
Determining whether at least one of voice recognition by the voice recognition unit and call control by the hands-free control unit is in use;
The drive management unit
When it is determined that at least one of voice recognition by the voice recognition unit and call control by the hands-free control unit is in use, switching to only the second driving device;
A navigation device characterized by that. The navigation device according to claim 1 or 2,
The vehicle is provided with a battery for the second drive device,
The condition determination unit
Determining whether the charge / discharge state of the battery satisfies certain conditions;
The drive management unit
When it is determined that the charge / discharge state of the battery does not satisfy a certain condition, the first drive device is not stopped.
A navigation device characterized by that. The navigation device according to claim 3,
The condition determination unit
Determining whether the remaining amount of electricity in the battery is greater than or equal to a specified amount;
The drive management unit
When it is determined that the remaining amount of electricity in the battery is less than a specified amount, the first driving device is not stopped.
A navigation device characterized by that. The navigation device according to claim 3 or 4,
The drive management unit
At least one of voice recognition by the voice recognition unit and call control by the hands-free control unit is in use, and the charge / discharge state of the battery no longer satisfies a certain condition by the condition determination unit In the case, the stop of engine driving by the first driving device is terminated.
A navigation device characterized by that. The navigation device according to any one of claims 3 to 5,
The drive management unit
At least one of voice recognition by the voice recognition unit and call control by the hands-free control unit is being used, and the condition determination unit is configured so that the charge / discharge state of the battery satisfies a certain condition If it becomes, the first driving device is stopped.
A navigation device characterized by that. The navigation device according to any one of claims 1 to 6,
A driving support control unit for controlling a driving support system for supporting driving;
The driving support control unit
Operating the driving support system when the first driving device is switched;
A navigation device characterized by that. The navigation device according to any one of claims 1 to 7,
The drive management unit
When notifying the surroundings that the vehicle exists, the first drive device is activated.
A navigation device characterized by that. The navigation device according to claim 5 or 8,
When the first drive device is activated by the drive management unit, at least one of the voice recognition unit and the hands-free control unit that are being used is a mode for removing engine noise for the setting. Change to
A navigation device characterized by that. A drive switching method in a navigation device installed in a vehicle, comprising: a first drive device that drives the vehicle by engine drive; and a second drive device that drives the vehicle by electric drive,
A condition determination step for determining whether or not a predetermined condition for performing voice input / output in the vehicle is satisfied;
Performing a drive management step of controlling the first drive device and the second drive device in accordance with a determination result of the condition determination step;
In the drive management step,
When it is determined in the condition determination step that the predetermined condition is satisfied, engine driving by the first drive device is stopped.
A drive switching method characterized by that. A program for causing a computer to function as a navigation device installed in a vehicle including a first drive device that drives a vehicle by driving an engine and a second drive device that drives the vehicle by electric drive,
A condition determination step for determining whether or not a predetermined condition for performing voice input / output in the vehicle is satisfied;
According to the determination result of the condition determination step, the computer executes the drive management step of controlling the first drive device and the second drive device,
In the drive management step,
When it is determined in the condition determination step that the predetermined condition is satisfied, engine driving by the first drive device is stopped.
A program characterized by that.

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