WO2013132640A1 - 車両制御装置 - Google Patents
車両制御装置 Download PDFInfo
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- WO2013132640A1 WO2013132640A1 PCT/JP2012/056035 JP2012056035W WO2013132640A1 WO 2013132640 A1 WO2013132640 A1 WO 2013132640A1 JP 2012056035 W JP2012056035 W JP 2012056035W WO 2013132640 A1 WO2013132640 A1 WO 2013132640A1
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Definitions
- the present invention relates to a vehicle control device.
- vehicles such as automobiles include so-called hybrid vehicles including both an internal combustion engine (engine) that burns fuel as a power source and a motor (motor generator) that is driven by electric power.
- engine internal combustion engine
- motor motor generator
- Such a vehicle having a plurality of power sources is controlled to switch between running with an engine as a power source, running with a motor generator as a power source, and running with both the engine and the motor generator as power sources.
- Patent Document 1 discloses a hybrid vehicle control that includes an engine and a motor generator as drive sources in a drive system, and drive wheels, and includes a battery, an information acquisition unit, an operation schedule setting unit, and a drive control unit. An apparatus is described.
- the driving power generation mode in addition to the driving control in the electric vehicle mode in the low-load section Engine intermittent running control that repeats the electric vehicle mode.
- Patent Document 2 describes a vehicle control device having a plurality of travel modes (drive modes).
- the control device includes: means for detecting the travel information of the vehicle affected by a driver's preference; storage means for storing travel information for each category classified based on at least road information; and detection Means for updating the stored travel information and storing it in the storage means, means for searching for the travel route to the destination, means for identifying the road information on the searched travel route, Based on the obtained road information, the means for specifying the category corresponding to the searched travel route, the means for reading the travel information in the identified category from the storage means, and based on the read travel information A prediction means for predicting an energy balance in the searched travel route, and a travel mode in the searched travel route is set based on the predicted energy balance. And setting means for, so that the vehicle travels the travel mode set, and means for controlling the vehicle.
- the device described in Patent Document 1 can improve fuel efficiency.
- the apparatus described in Patent Literature 2 can travel in a travel mode (drive mode) that matches the driver's preference.
- the vehicle control apparatus that controls the drive mode of the vehicle can increase the accuracy of calculation of the drive mode by increasing the amount of information processing.
- the load on the calculation function increases and calculation takes time.
- An object of the present invention is to provide a vehicle control device that can more quickly control the traveling of a vehicle.
- the present invention is a vehicle control device, a vehicle control device that controls a vehicle, a route detection unit that detects a route to a destination, a travel load calculation unit that calculates travel load information of the route, A travel plan calculation unit that calculates a travel plan including a drive mode of each section of the route based on the route and the travel load information of the route, the travel load calculation unit from the current location to the destination The degree of detail of the section in which the travel load information is calculated is changed according to the distance.
- the travel load calculation unit when the distance from the current location to the destination is longer than the threshold distance, at least a part of the section, the degree of detail when the distance from the current location to the destination is shorter than the threshold distance It is preferable to calculate the travel load information with a rougher detail.
- the traveling load calculation unit determines the level of detail in the middle section from the level of detail in the neighborhood of the current location and the neighborhood of the destination. It is preferable to roughen.
- the traveling load calculation unit is rougher than at least a part of the section than when the distance from the current location to the destination is shorter than the threshold distance.
- the travel load information is calculated with a finer level of detail for the at least some sections, and the travel plan calculation unit is updated when the travel load information is updated, It is preferable to update the travel plan based on the updated travel load information.
- the vehicle further includes a travel support unit that notifies the driver of the travel plan calculated by the travel plan calculation unit.
- the vehicle is a hybrid vehicle including a motor generator and an internal combustion engine
- the travel plan calculation unit includes, as the drive mode, an EV mode that travels using the motor generator as a drive source, the motor generator, and the internal combustion engine. It is preferable to be able to select a hybrid travel mode in which the engine is used as a drive source.
- the travel plan calculation unit includes the travel load information having a detail level that is rougher than a detail level when the distance from the current location to the destination is shorter than a threshold distance
- the travel plan calculation unit is configured so that the EV mode is easily selected. It is preferable to calculate a travel plan.
- the travel load calculation unit calculates the travel load information to a midpoint of the route to the destination when the distance from the current location to the destination is longer than a set distance.
- the vehicle is a hybrid vehicle including a motor generator and an internal combustion engine
- the travel plan calculation unit includes, as the drive mode, an EV mode that travels using the motor generator as a drive source, the motor generator, and the internal combustion engine.
- the hybrid travel mode that travels using the engine as a drive source can be selected, and when the section in which the travel load information is calculated reaches the midpoint of the route to the destination, the midpoint is reached. It is preferable to set the target SOC at the time to a high value.
- the traveling load calculation unit sets the section to a longer distance than when the detail level is fine when the detail level is rough.
- the vehicle control device has an effect that it is possible to more quickly control the traveling of the vehicle by changing the level of detail for calculating the traveling load according to the distance to the destination.
- FIG. 1 is an explanatory diagram illustrating an example of an operation control system according to the present embodiment.
- FIG. 2 is a block diagram illustrating a schematic configuration of a vehicle on which the vehicle control device according to the embodiment is mounted.
- FIG. 3 is a flowchart illustrating an example of processing of the ECU.
- FIG. 4 is an explanatory diagram for explaining the processing operation of the vehicle control device.
- FIG. 5 is a flowchart illustrating an example of processing of the ECU.
- FIG. 6 is a flowchart illustrating an example of processing of the ECU.
- FIGS. 1 to 6 The embodiment will be described with reference to FIGS. 1 to 6.
- the present embodiment relates to an operation control system having a vehicle on which a vehicle control device is mounted.
- FIGS. 1 and 2 the configuration of an operation control system having a vehicle equipped with a vehicle control device will be described with reference to FIGS. 1 and 2.
- FIG. 1 is an explanatory diagram illustrating an example of an operation control system according to the present embodiment.
- FIG. 2 is a block diagram illustrating a schematic configuration of a vehicle on which the vehicle control device according to the embodiment is mounted.
- the driving control system 1 shown in FIG. 1 includes a plurality of vehicles 10, a plurality of traffic lights 12, 12a, a plurality of infrastructure information transmitting devices 14, a plurality of traffic information communication base stations 15, and a GPS satellite 16. .
- the driving control system 1 uses information obtained by a vehicle 10 equipped with a vehicle control device 19 (described later) among a plurality of vehicles 10 through communication with an infrastructure information transmission device 14, a traffic information communication base station 15, and a GPS satellite 16. Based on this, a travel plan is calculated, and driving is supported based on the calculated travel plan.
- the vehicle 10 is a vehicle capable of traveling on a road, such as an automobile or a truck.
- the vehicle 10 can travel on the road where the traffic lights 12 and 12a are arranged.
- the configuration of the vehicle 10 will be described later.
- the traffic lights 12, 12a are lighting devices arranged at intersections.
- the traffic light 12 includes a lighting part of three colors of green, yellow, and red.
- the traffic light 12a includes a lighting part (arrow lamp) that displays an arrow in addition to the lighting parts of three colors of green, yellow, and red.
- the traffic lights 12, 12a are arranged in the traveling direction of the vehicle on the road.
- the traffic light 12 is in a state in which the vehicle 10 may pass through the traveling direction of the vehicle 10 on the road by switching the lighting portion to emit light among the lighting portions of green, yellow, and red. Indicates a state in which it cannot pass, that is, a state to be stopped.
- the operation control system 1 shown in FIG. 1 has shown the case where the traffic lights 12 and 12a are arrange
- the traffic lights 12, 12a may be arranged with respect to a pedestrian crossing, for example.
- the infrastructure information transmission device 14 transmits infrastructure information such as road information of a road on which the vehicle 10 travels and signal information related to traffic lights 12 and 12a ahead of the vehicle 10 in the traveling direction.
- the infrastructure information transmission device 14 according to the present embodiment is arranged at each intersection and transmits infrastructure information to the vehicle 10 traveling in a certain range around by wireless communication.
- the road information typically includes speed limit information of a road on which the vehicle 10 travels, stop line position information of an intersection, and the like.
- the signal information typically includes signal cycle information such as lighting cycles and signal change timings of the blue, yellow, and red signals of the traffic lights 12 and 12a.
- the infrastructure information transmitting device 14 may be provided for each of the traffic lights 12 and 12a, or may be provided at a plurality of intersections.
- the traffic information communication base station 15 is a so-called ITS (Intelligent Transport Systems) spot or roadside device that outputs road traffic information of a road on which the vehicle 10 travels.
- the traffic information communication base station 15 typically includes road traffic information, road traffic information, road construction information, and lane regulation information. Further, the traffic information communication base station 15 outputs road traffic information in a wide range, for example, a range of about 1000 km, to the vehicle 10.
- the traffic information communication base station 15 can communicate with a road traffic information center that aggregates road traffic information wirelessly or by wire, and obtains the road traffic information collected at the road traffic information management center in real time (latest). Wide area road traffic information can be acquired, and the acquired real-time road traffic information can be output to the vehicle 10.
- the GPS satellite 16 is a satellite that outputs GPS signals necessary for position detection by GPS (GPS: Global Positioning System). Although only one GPS satellite 16 is shown in FIG. 1, the operation control system 1 includes at least three GPS satellites 16. The device that detects the position by GPS receives GPS signals output from at least three GPS satellites 16 and compares the received GPS signals to detect the position of the device itself.
- GPS Global Positioning System
- the vehicle 10 equipped with the vehicle control device 19 will be described with reference to FIG.
- all the vehicles are the vehicles 10 on which the vehicle control device 19 is mounted.
- at least one vehicle 10 may be mounted on the vehicle control device 19. That is, in the operation control system 1, a vehicle not equipped with the vehicle control device 19 may travel before and after the vehicle 10 equipped with the vehicle control device 19.
- the vehicle 10 includes an ECU 20, a storage unit 22, an accelerator actuator 24, an engine 25a, a motor generator (MG) 25b, a brake actuator 26, a car navigation device 28, a traffic information communication unit 29, and a speaker 30.
- the GPS communication unit 32, the infrastructure communication unit 38, the vehicle speed sensor 40, the display device 42, the hybrid ECU 44, and the battery actuator 46 are included.
- the ECU 20 of the vehicle 10 the storage unit 22, the accelerator actuator 24, the brake actuator 26, the car navigation device 28, the traffic information communication unit 29, the speaker 30, the GPS communication unit 32, and the infrastructure communication unit 38.
- the vehicle speed sensor 40, the display device 42, the hybrid ECU 44, and the battery actuator 46 also serve as the vehicle control device 19 for the vehicle 10.
- the vehicle 10 includes various parts that are generally provided by the vehicle, a vehicle body, a brake device, an operation part (for example, a steering wheel, an accelerator pedal, a brake pedal), a battery, and the like.
- the ECU 20 is an electronic control unit that controls each part of the vehicle 10, the accelerator actuator 24, the brake actuator 26, the car navigation device 28, the speaker 30, the GPS communication unit 32, the infrastructure communication unit 38, the vehicle speed sensor 40, the display device 42, and the like. To do.
- the ECU 20 is configured based on information acquired by the GPS communication unit 32, the infrastructure communication unit 38, and the vehicle speed sensor 40, and operations performed by a driver or the like input from various operation units such as an accelerator pedal and a brake pedal (not shown). To control the operation.
- the ECU 20 includes a drive control unit 20a, a route detection unit 20b, a travel load calculation unit 20c, a travel plan calculation unit 20d, and a driving support control unit 20e.
- the drive control unit 20a, the route detection unit 20b, the travel load calculation unit 20c, the travel plan calculation unit 20d, and the driving support control unit 20e will be described later.
- the storage unit 22 is a storage device such as a memory, and stores conditions and data necessary for various processes in the ECU 20 and various programs executed by the ECU 20.
- the storage unit 22 stores a map information database 22a.
- the map information database 22a stores information (map, straight road, curve, uphill / downhill, highway, sag, tunnel, etc.) necessary for the vehicle 10 to travel.
- the map information database 22a includes a map data file, an intersection data file, a node data file, and a road data file.
- the ECU 20 reads out necessary information with reference to the map information database 22a.
- the accelerator actuator 24 controls the output of the power source of the vehicle 10 such as the engine 25a and the MG 25b.
- the accelerator actuator 24 can control, for example, the intake amount to the engine 25a, the intake timing and the ignition timing, the voltage value supplied from the MG 25b, the frequency, and the like.
- the accelerator actuator 24 is electrically connected to the ECU 20 and its operation is controlled by the ECU 20.
- the ECU 20 operates the accelerator actuator 24 according to the accelerator control signal, and adjusts the intake air amount, the intake timing and the ignition timing to the engine 25a, the voltage value and the frequency supplied by the MG 25b.
- the accelerator actuator 24 is a device for automatically controlling the driving force by the power source, receives the accelerator control signal output from the ECU 20, and drives each part to control the driving conditions and drive as desired. Generate power. Thus, the accelerator actuator 24 adjusts the acceleration by controlling the driving force acting on the vehicle 10.
- the engine 25a applies a driving force to the wheels of the vehicle 10 in response to an acceleration request operation by the driver, for example, an accelerator pedal depression operation.
- the engine 25a consumes fuel and generates engine torque as engine torque as driving power to be applied to the drive wheels of the vehicle 10.
- the engine 25a is a heat engine that outputs heat energy generated by burning fuel in the form of mechanical energy such as torque, and examples thereof include a gasoline engine, a diesel engine, and an LPG engine.
- the engine 25 a includes, for example, a fuel injection device, an ignition device, a throttle valve device, and the like. These devices are electrically connected to an accelerator actuator 24 and controlled by the accelerator actuator 24.
- the output torque of the engine 25a is controlled by the accelerator actuator 24.
- the power generated by the engine 25a may be used for power generation in the MG 25b.
- the MG 25b applies a driving force to the wheels of the vehicle 10 in response to an acceleration request operation by the driver, for example, an accelerator pedal depression operation.
- the MG 25b converts electric energy into mechanical power as driving power to be applied to the driving wheels of the vehicle 10 to generate motor torque.
- the MG 25b is a so-called rotating electrical machine including a stator that is a stator and a rotor that is a rotor.
- the MG 25b is an electric motor that converts electric energy into mechanical power and outputs it, and also a generator that converts mechanical power into electric energy and recovers it.
- the MG 25b has a function (power running function) as an electric motor that is driven by supplying electric power to convert electric energy into mechanical energy and outputs it, and a function as a generator (regenerative function) that converts mechanical energy into electric energy.
- the MG 25b is electrically connected to and controlled by the accelerator actuator 24 through an inverter or the like that converts direct current and alternating current.
- the output torque and power generation amount of the MG 25b are controlled by the accelerator actuator 24 via the inverter.
- the brake actuator 26 controls driving of a brake device mounted on the vehicle 10.
- the brake actuator 26 controls the hydraulic pressure of a wheel cylinder provided in the brake device, for example.
- the brake actuator 26 is electrically connected to the ECU 20 and its operation is controlled by the ECU 20.
- the ECU 20 operates the brake actuator 26 according to the brake control signal to adjust the brake hydraulic pressure of the wheel cylinder.
- the brake actuator 26 is a device for automatically controlling the braking force by the brake, and drives a solenoid or a motor of a mechanism that receives a brake control signal output from the ECU 20 and supplies hydraulic oil to the wheel cylinder.
- the brake hydraulic pressure is controlled to generate a desired braking force.
- the brake actuator 26 adjusts the deceleration by controlling the braking force acting on the vehicle 10.
- the car navigation device 28 is a device that guides the vehicle 10 to a predetermined destination.
- the car navigation device 28 is capable of bidirectional communication with the ECU 20.
- the car navigation device 28 includes a display unit, and based on information stored in the map information database 22a and information on the current location (current position) acquired by the GPS communication unit 32 described later, the surrounding map information is displayed. Display on the display.
- the car navigation device 28 also includes information stored in the map information database 22a, current location information acquired by the GPS communication unit 32, which will be described later, and destination (target location) information input by a driver or the like. The route from to the destination is detected, and the detected route information is displayed on the display unit.
- the car navigation device 28 includes a map information database and a GPS communication unit in its own device separately from the map information database 22a and the GPS communication unit 32, and performs route guidance and notification of current location information using each unit of the own device. You may do it.
- the traffic information communication unit 29 communicates with the above-described traffic information communication base station 15 by radio.
- the traffic information communication unit 29 acquires the road traffic information transmitted from the traffic information communication base station 15 and transmits the acquired road traffic information to the ECU 20.
- the traffic information communication unit 29 may always communicate with the communicable traffic information communication base station 15 to acquire road traffic information, or communicate with the traffic information communication base station 15 at regular time intervals. Information may be acquired.
- the speaker 30 outputs sound into the vehicle 10.
- the speaker 30 outputs sound corresponding to the sound signal transmitted from the ECU 20 into the vehicle.
- the GPS communication unit 32 receives GPS signals output from a plurality of GPS satellites 16.
- the GPS communication unit 32 sends the received GPS signal to the ECU 20.
- the ECU 20 detects the position information of its own device by analyzing the plurality of received GPS signals.
- the infrastructure communication unit 38 communicates with the above-described infrastructure information transmission device 14 wirelessly.
- the infrastructure communication unit 38 acquires the infrastructure information transmitted from the infrastructure information transmission device 14 and transmits the acquired infrastructure information to the ECU 20.
- the infrastructure communication unit 38 may always communicate with the communicable infrastructure information transmission device 14 to acquire infrastructure information, or communicate with the infrastructure information transmission device 14 at regular time intervals to acquire infrastructure information. Alternatively, when communication with a new infrastructure information transmission apparatus 14 becomes possible, communication with the infrastructure information transmission apparatus 14 may be performed to acquire infrastructure information.
- the vehicle speed sensor 40 detects the vehicle speed of the vehicle 10.
- the vehicle speed sensor 40 transmits the acquired vehicle speed information to the ECU 20.
- the display device 42 is a display device that displays various types of information notified to the driver, and is, for example, an instrument panel arranged on the dashboard of the vehicle 10.
- the display device 42 may be a liquid crystal display device or a display device in which various instruments are arranged.
- the display device 42 displays information such as the remaining amount of fuel, power source output (engine speed), door open / closed state, seat belt wearing state, and the like.
- the display device 42 includes a speed display area for displaying the vehicle speed.
- the hybrid ECU 44 controls the power source controlled by the accelerator actuator 24 in accordance with the driving mode of the power source.
- the hybrid ECU 44 has an engine running mode in which a driving force is generated in the driving wheel only by the output of the engine 25a as a driving mode of the power source, and an EV in which the driving wheel is generated only by an output as the motor of the MG 25b.
- At least a traveling mode and a hybrid traveling mode in which driving force is generated in the driving wheels by the outputs of both the engine 25a and the MG 25b are set.
- the hybrid ECU 44 switches the drive mode based on the driver's drive request, battery charge state, vehicle travel state information, and the like.
- the hybrid ECU 44 determines a drive mode that can be switched by itself based on a travel plan set by a travel plan calculation unit 20d (to be described later) of the ECU 20 and the control of the driving support control unit 20e.
- the hybrid ECU 44 may be in a state where only one drive mode can be selected based on the travel plan and the control state of the driving support control unit 20e. In this case, the hybrid ECU 44 sets the drive mode to the same drive mode regardless of the drive request, the battery charging state, and the vehicle running state.
- the hybrid ECU 44 When the engine driving mode is selected, the hybrid ECU 44 sends a control command to the accelerator actuator 24 so that the required driving force according to the driving request of the driver is generated only by the engine torque of the engine 25a.
- the hybrid ECU 44 selects the EV travel mode, the hybrid ECU 44 sends a control command to the accelerator actuator 24 so that the required driving force according to the driving request of the driver is generated only by the motor torque of the MG 25b.
- the hybrid ECU 44 in principle, generates the required driving force according to the driving request of the driver by the engine torque of the engine 25a and the output of the motor or generator of the MG 25b. A control command is sent to 24.
- the battery actuator 46 controls a battery mounted on the vehicle.
- the battery actuator 46 controls the amount of charge and the amount of discharge of the battery based on a preset charge / discharge map. Further, the battery actuator 46 detects the state of charge (SOC) of the battery and sends the detection result to the ECU 20.
- SOC state of charge
- the drive control unit 20a controls the operation of each unit related to driving of the vehicle 10, such as the accelerator actuator 24, the brake actuator 26, the hybrid ECU 44, and the like.
- the drive control unit 20a controls the operation of each unit related to the driving of the vehicle 10 based on the driving request of the driver, the braking request of the driver, the detection result of the vehicle speed sensor 40, and the like, and controls the driving of the vehicle 10. .
- the drive control unit 20a outputs information acquired from each unit connected to the ECU 20 to the accelerator actuator 24, the brake actuator 26, and the hybrid ECU 44.
- the route detection unit 20b performs two-way communication with the car navigation device 28 to detect a travel route to the destination of the vehicle 10.
- the route detection unit 20b outputs the information in the map information database 22a, the road traffic information acquired by the traffic information communication unit 29, the current location information acquired by the GPS communication unit 32, and the like to the car navigation device 28. Obtain the calculated route information.
- the route detection unit 20b may detect the route without using the calculation result of the car navigation device 28. That is, the route detection unit 20b may detect the travel route to the destination by a process different from that of the car navigation device 28.
- the traveling load calculation unit 20c calculates the load generated when traveling on the route detected by the route detection unit 20b by calculation.
- the traveling load calculation unit 20c calculates the power (traveling power) necessary for traveling on the route based on the inclination of the traveling route, the required time, the braking speed, and the like. Based on the calculated power, the traveling load calculation unit 20c calculates fuel and electric power necessary for traveling on the route, and calculates the traveling load information.
- the traveling load calculation unit 20c performs regeneration at the MG 25b when traveling on the route, and when power can be charged, calculates the power that can be charged and calculates it as a part of the traveling load. Note that the chargeable power may be subtracted from the power consumption.
- the traveling load calculation unit 20c calculates the traveling load with a lighter value when there is electric power that can be charged.
- the travel load information is not limited to energy consumption, fuel consumption, and travel power, but may include vehicle speed, gradient, required time, and the like.
- the travel plan calculation unit 20d creates a travel plan by calculation based on the travel route detected by the route detection unit 20b and the travel load calculated by the travel load calculation unit 20c. Specifically, the travel plan calculation unit 20d determines a drive mode for traveling along each position of the travel route based on the travel route and the travel load, and determines the relationship between the determined drive mode and the position of the travel route. Make a travel plan.
- the driving support control unit 20e supports the driving of the driver by controlling the driving mode based on the driving plan calculated by the driving plan calculation unit 20d. Specifically, the driving support control unit 20e controls operations of the drive control unit 20a, the accelerator actuator 24, and the hybrid ECU 44 so that the vehicle 10 is driven in the determined drive mode.
- the driving support control unit 20e may execute various driving supports other than the drive mode based on the travel plan.
- the driving support includes, for example, control that supports the driving of the driver based on the relationship between the signal cycle information received via the infrastructure communication unit 38 and the current location.
- the driving support control unit 20e displays the speed that can pass without stopping at the traffic light, and supports the driver's driving, the accelerator OFF timing and the brake that can be performed with good energy efficiency when stopping at the stop line An operation to notify the ON timing is executed.
- the driving support control unit 20e can display the travel plan calculated by the travel plan calculation unit 20d on the car navigation device 28 or the display device 42 or output the travel plan from the speaker 30.
- FIG. 3 is a flowchart illustrating an example of processing of the ECU 20.
- FIG. 4 is an explanatory diagram for explaining the processing operation of the vehicle control device.
- FIG. 5 is a flowchart illustrating an example of processing of the ECU 20. 3 and 5 are executed by each part of the ECU 20 such as the route detection unit 20b, the travel load calculation unit 20c, and the travel plan calculation unit 20d, which are components of the vehicle control device 19. This is realized.
- step S12 the setting of the destination is detected based on information input to the car navigation device 28 or the like by the driver or the like.
- step S14 the ECU 20 determines in step S14 whether D1 ⁇ the distance to the destination.
- D1 is a distance set as a threshold value.
- the distance D1 is a distance determined by a driver, an operator, or presetting.
- step S14 the ECU 20 determines whether the distance to the destination is longer than the distance D1.
- step S16 the ECU 20 determines all sections to the destination as the basic granularity.
- the driving load information is extracted by dividing the information into two.
- the granularity is a reference for dividing a route when the traveling load information is extracted. That is, the granularity is a value corresponding to the level of detail of the travel load information.
- the basic particle size is a reference particle size.
- the ECU 20 extracts information used to create travel load information for each segment divided by the basic granularity, and creates travel load information for each segment based on the extracted information.
- the information used to create the travel load information includes road (map) information for calculating a route and road traffic information.
- the ECU 20 proceeds to step S22 after extracting the travel load information in step S16.
- step S18 the ECU 20 divides the granularity of the intermediate section into a coarser particle size than the basic particle size, and extracts travel load information. Specifically, as shown in FIG. 4, the ECU 20 determines a route 84 from the current location 80 to the destination 82 based on the current location (start point) 80 and the destination (goal point) 82. Thereafter, when the distance of the path 84 is longer than D1, the ECU 20 divides the path 84 with a plurality of particle sizes 86a and 86b.
- the ECU 20 divides the route 84 into a section 90 on the current location 80 side, an intermediate section 92, and a section 94 on the destination 82 side.
- the boundary between the section 90 and the middle section 92 and the boundary between the section 94 and the middle section 92 are divided based on the setting. For example, a position that is a fixed distance from the current location 80 may be the boundary between the section 90 and the middle section 92. Further, a position that is a fixed distance from the destination 82 may be a boundary between the section 94 and the middle section 92.
- the ECU 20 divides the section 90 and the section 94 into a plurality of sections with a granularity 86a among the three sections.
- the particle size 86a is a basic particle size.
- the ECU 20 divides the midway section 92 into a plurality of sections with a particle size 86b.
- the particle size 86b is a coarser particle size than the particle size 86a. That is, the midway section 92 is divided into a plurality of sections at a distance longer than the particle size 86a. Thereby, the section of the midway section 92 has a longer distance than the sections of the section 90 and the section 94.
- the ECU 20 divides the particle size of the midway section 92 into a plurality of sections with a particle size coarser than the basic particle size. Moreover, ECU20 extracts travel load information for every divided area. Specifically, the ECU 20 extracts information used to create travel load information for each segment divided by each granularity, and creates travel load information for each segment based on the extracted information.
- step S20 determines in step S20 whether the travel load information has been extracted with the basic granularity for all the sections. The ECU 20 determines whether the granularity of each section of the extracted traveling load information is the basic granularity in all sections. If the ECU 20 determines in step S20 that extraction with the basic granularity is complete (Yes), the ECU 20 proceeds to step S22. If the ECU 20 determines in step S20 that the extraction with the basic granularity is not completed (No), the ECU 20 proceeds to step S24.
- step S16 If the ECU 20 executes the process of step S16 or determines Yes in step S20, the ECU 20 performs normal setting as step S22 and proceeds to step S28.
- the normal setting is to set the standard setting for determining the drive mode to the normal setting.
- the ECU20 will set it as setting which gives priority to EV mode as step S24, when it determines with No in step S20, ie, when there exists the traveling load information of the division
- the setting that gives priority to the EV mode is a setting that makes it easy to assign the EV mode when determining the drive mode of the travel plan. For example, in the normal mode, the EV mode is assigned to some travel load values to which the hybrid mode is assigned.
- step S24 the ECU 20 continues to extract travel load information with the granularity of the intermediate section as the basic granularity in step S26. That is, the intermediate section in which the travel load information is extracted with a coarser grain size than the basic grain size in step S18 is divided again with the basic grain size, and the travel load information is extracted for the segment divided with the basic grain size.
- the ECU 20 replaces the traveling load information for the section in which the traveling load information is extracted with the basic granularity for the intermediate section.
- step S28 the ECU 20 continues the process shown in FIG. 3 while performing the process of replacing the travel load information in the middle section until the travel load information is extracted with the basic granularity for all sections.
- step S28 the ECU 20 will produce a travel plan as step S28, if the process of step 22 or step S26 is performed. Specifically, the ECU 20 determines a drive mode for traveling in each section and each section based on the extracted travel load information to the destination and the settings (setting that prioritizes EV mode, normal setting). Then, the relationship between the determined drive mode and each section and each section is defined as a travel plan.
- the ECU20 will switch a drive mode based on a travel plan and a present location as step S30, if a travel plan is created by step S28. Specifically, the ECU 20 determines the travel load at the current location based on the travel plan and the current location, and switches the drive mode based on the result. Note that the ECU 20 specifies the drive mode assigned in the travel plan based on the current location, and drives the drive mode assigned in the travel plan based on the travel load of the current location even if the drive mode is driven in the drive mode. May be corrected.
- step S32 the ECU 20 will determine whether control is complete
- the ECU 20 determines that the control is finished when the destination is reached, when the destination is changed, when driving assistance is stopped, or the like. If the ECU 20 determines in step S32 that the control has not ended (No), the ECU 20 proceeds to step S20. If the ECU 20 determines that the control is finished (Yes) in step S32, the ECU 20 finishes this process. Note that, when the travel load information is updated in step S26, the ECU 20 may calculate the entire travel plan, but may correct a necessary part.
- the vehicle control device 19 changes the level of detail of the section in which the travel load information is calculated according to the distance to the destination (the remaining distance to the destination).
- An appropriate travel plan can be calculated in time.
- the vehicle control device 19 can start appropriate driving support quickly by calculating an appropriate travel plan in a short time.
- the vehicle control device 19 of the present embodiment extracts travel load information by dividing the entire section with the basic granularity, and the distance to the destination is the threshold value.
- the traveling load information is extracted by dividing the intermediate section with a coarser grain size than the basic grain size.
- the vehicle control device 19 divides the intermediate section with a coarser granularity than the basic granularity and extracts the traveling load information, The amount of travel load information to be determined even when the distance up to is long can be set to a certain amount or less.
- the vehicle control device 19 can extract the travel load information of all sections by extracting the travel load information with coarser granularity, while shortening the time required to calculate the line plan, Accuracy can be maintained.
- the vehicle control device 19 can increase the amount of information between the vicinity of the current location and the vicinity of the destination by setting the section where the granularity is rough as the intermediate section, and can maintain the accuracy of the travel plan.
- the vehicle control device 19 of the present embodiment changes the level of detail by changing the granularity of the division into which each section is divided, but the present invention is not limited to this.
- the vehicle control device 19 only needs to be able to adjust the data amount of various types of information used for calculating the travel load information, and can use other than granularity as the level of detail.
- the type of data used may be adjusted as the level of detail.
- the travel load information is calculated by taking into account the route distance, slope, traffic jam information, signal cycle information and the behavior by the driving assistance to be executed.
- the travel load may be calculated by taking into account only the distance of the route.
- the vehicle control apparatus 19 when the vehicle control device 19 extracts travel load information with a coarse granularity in the middle section, after calculating the travel plan, the vehicle control apparatus 19 sets the granularity in the intermediate section as the basic granularity (that is, a finer granularity). The process of extracting the road plan is continued, the travel load information of the route is updated (rewritten), and the travel plan is recalculated or corrected to quickly start driving support based on the travel plan, The accuracy can be increased. Thereby, both the effect obtained by starting driving assistance in a shorter time and the effect obtained by executing driving assistance with higher accuracy can be obtained. Further, the vehicle control device 19 may notify the driver that the calculation of the travel plan has been completed and that the driving support can be started as driving support. Furthermore, when the travel plan is updated, the vehicle control device 19 may notify the driver to that effect. As a result, the driver can recognize the accuracy of the calculated travel plan.
- the vehicle control device 19 preferentially selects the EV mode as the drive mode when the travel load information cannot be extracted with the basic granularity for all sections, that is, when the granularity of the travel load information in the intermediate section is rough.
- the vehicle control device 19 of the present embodiment has been described as a case where the driving mode of each section and each section is set as a travel plan, the present invention is not limited to this.
- a travel plan the engine operating ratio of each section and each section may be determined, or an engine threshold value (a threshold value of a travel load as a condition for traveling in the hybrid mode during travel) may be determined. It may be set. Based on the travel plan and the actual travel conditions, the vehicle travels so that the value of the travel plan, the engine threshold value, and the target SOC can be achieved, so that the fuel consumption can be further improved and the driver is comfortable. Can support driving.
- the vehicle control device 19 when the vehicle control device 19 has an engine threshold value (threshold value of a travel load as a condition for hybrid travel during travel) as a travel plan, the section in which the travel load is traveled during travel in the EV mode, and the engine threshold value of the segment If it exceeds, start running in hybrid mode.
- the vehicle control device 19 can control the ease of traveling in the hybrid mode in each section and each section by adjusting the engine threshold, which is a condition for traveling in the hybrid mode during traveling, and improve fuel efficiency. Can do.
- the vehicle control device 19 can reduce the influence on the travel plan, the granularity of the intermediate section is set to a coarse granularity, but is not limited thereto.
- the vehicle control device 19 may calculate the entire route to the destination with a rough granularity.
- the vehicle control device 19 adjusts the area for calculating the travel plan when the distance to the destination exceeds the distance threshold longer than the distance D1.
- An example of processing of the ECU 20 of the vehicle control device 19 will be described with reference to FIG. ECU20 detects the setting of the destination as step S40.
- the ECU 20 determines in step S42 whether D2 ⁇ the distance to the destination.
- D2 is a distance set as a threshold, and is a distance longer than the distance D1 described above.
- step S42 the ECU 20 determines whether the distance to the destination is longer than the distance D2.
- step S42 determines in step S42 that D2 is not the distance to the destination (No), that is, if the distance to the destination is equal to or less than D2, the ECU 20 extracts travel load information to the destination as step S44.
- the travel load information extraction process executed in step S44 is the process of the flowchart of FIG. In other words, the ECU 20 extracts the traveling load information by adjusting the granularity for calculating the traveling load information based on the distance to the destination. Further, when calculating the travel load information with a rough granularity, the extraction of the travel load information with a finer granularity is continued and updated. The setting for determining the drive mode is also switched. If the ECU 20 extracts the travel load information in step S44, the ECU 20 proceeds to step S50.
- step S42 If it is determined in step S42 that D2 ⁇ the distance to the destination (Yes), the ECU 20 extracts travel load information up to the distance D2 in step S46. In this case, it is preferable that the ECU 20 detects the travel load information of the section up to the distance D2 with a rough granularity, and then continues to extract the travel load information with the basic granularity. The ECU 20 may extract the travel load information from the beginning with the basic granularity.
- step S50 if the process of step 44 or step S48 is performed. Specifically, the ECU 20 determines each section and each section based on the extracted travel load information to the destination or travel load information up to the distance D2 and the setting (setting that prioritizes EV mode, normal setting). A drive mode for traveling is determined, and the relationship between the determined drive mode and each section and each section is defined as a travel plan.
- the ECU20 will switch a drive mode based on a travel plan and a present location as step S52, if a travel plan is created by step S50. Specifically, the ECU 20 determines the travel load at the current location based on the travel plan and the current location, and switches the drive mode based on the result. Note that the ECU 20 specifies the drive mode assigned in the travel plan based on the current location, and drives the drive mode assigned in the travel plan based on the travel load of the current location even if the drive mode is driven in the drive mode. May be corrected.
- step S52 after switching the drive mode in step S52, resets the setting of the target power remaining amount B as step S54, that is, returns to the reference value, and determines whether the control is finished as step S56.
- the ECU 20 determines that the control is finished when the destination is reached, when the destination is changed, when driving assistance is stopped, or the like. If it is determined in step S56 that the control is not finished (No), the ECU 20 proceeds to step S42. If the ECU 20 determines that the control is finished (Yes) in step S56, the ECU 20 finishes this process.
- the vehicle control device 19 quickly calculates the travel plan by determining the target range for calculating the travel plan according to the distance to the destination (the remaining distance to the destination). And appropriate driving assistance can be executed. That is, when the distance to the destination is long, the travel plan can be quickly calculated by calculating the travel plan for a predetermined distance.
- the vehicle control device 19 creates a travel plan to the destination when the distance to the destination is less than the threshold distance (D2), and the distance D2 when the distance to the destination is equal to or greater than the threshold distance (D2).
- a travel plan is created for the route up to.
- the vehicle control device 19 when the vehicle control device 19 creates a travel plan with travel load information to a midpoint on the route to the destination, the vehicle control device 19 corrects the target SOC to a higher value (a value that increases the remaining battery capacity).
- a higher value a value that increases the remaining battery capacity.
- the target SOC is adjusted.
- the present invention is not limited to this, and it may be set to preferentially select the hybrid mode as the drive mode, or may be set to lower the engine operating threshold.
- the vehicle control device 19 may be set to increase the remaining amount of the battery when the distance D2 is reached.
- the vehicle control device 19 calculates the travel load information by adjusting the granularity in steps S44 and S46 in the flowchart of FIG. 5, but the present invention is not limited to this.
- the vehicle control device 19 may make the granularity constant when executing the processing of the flowchart of FIG. Even in this case, the degree of detail of the travel load information on the route to the destination can be adjusted by adjusting the section from which the travel load information is extracted on the route to the destination. That is, the vehicle control device 19 controls whether to extract the driving load information up to the middle or the driving load information to the destination even if the length of the section and the type of information to be used are constant. The level of detail of the load information can be adjusted.
- the vehicle control device 19 may calculate a travel plan to a position that is known by the processing shown in FIG.
- the vehicle control device 19 may re-create the travel plan even after the destination is set. That is, after the destination is set, the vehicle control device 19 may create the travel plan again when a predetermined condition (for example, every fixed distance travel, every constant time elapses) is satisfied. Thereby, each information can be updated to the newest state, a travel plan can be correct
- a predetermined condition for example, every fixed distance travel, every constant time elapses
- FIG. 6 is a flowchart illustrating an example of processing of the ECU.
- the ECU 20 repeatedly executes the process shown in FIG. ECU20 acquires a travel plan as Step S60.
- the travel plan may be a plan that has been acquired in advance. If ECU20 acquires a travel plan by step S60, it will acquire a present location as step S62. Information on the current location can be acquired from the GPS communication unit 32.
- step S64 if it is an EV drive area is acquired by step S62.
- the ECU 20 compares the travel plan acquired at step S60 with the current location acquired at step S62, and determines whether the drive mode of the travel plan at the current location is the EV travel mode. If it is determined in step S64 that the vehicle is in the EV travel section (Yes), the ECU 20 sets the drive mode to the EV travel mode in step S66 and ends the present process. If it is determined in step S64 that the vehicle is not in the EV travel section (No), the ECU 20 sets the drive mode to the hybrid travel mode in step S68 and ends the present process.
- the vehicle 10 can efficiently use the driving force of the power source by switching the driving mode based on the travel plan created by the vehicle control device 19 as described above, and can improve fuel efficiency. For example, when the vehicle 10 is a plug-in hybrid vehicle, more electric power charged in the battery can be used before reaching the charging position again. Thereby, electric power can be consumed efficiently and a fuel consumption can be improved.
- the operation control system 1 of the above embodiment can efficiently acquire road information in a wider area by acquiring road traffic information through communication with a traffic information communication base station (ITS spot) 15.
- ITS spot traffic information communication base station
- the vehicle 10 of the operation control system 1 of the above embodiment has acquired the road traffic information through communication with the traffic information communication base station 15, the present invention is not limited to this.
- the vehicle 10 may receive radio waves output by various radio communications, for example, radio radio waves and television radio waves, and acquire road traffic information included in the radio waves.
- the traveling load calculation unit 20c may calculate the traveling load in consideration of information on driving assistance executed by the traveling support control unit 20e during traveling. For example, fuel efficiency improvement support performed by the travel support control unit 20e during travel, for example, support for guiding the vehicle speed that can be passed with a green light, and support for guiding the timing of accelerator OFF so that the vehicle can travel in a free run when stopped with a red light
- the travel load information may be calculated in consideration of
- the operation control device 19 can calculate a more accurate travel load and can create a more appropriate operation plan.
- the driving control device 19 can further improve the fuel consumption, and can assist the driver to drive comfortably.
- the operation control device 19 can provide necessary information and calculation results in a short time by adjusting the level of detail (granularity) for calculating the travel load information based on the distance to the destination. it can.
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Abstract
Description
図1から図6を参照して、実施形態について説明する。本実施形態は、車両制御装置が搭載された車両を有する運転制御システムに関する。まず、図1及び図2を用いて、車両制御装置が搭載された車両を有する運転制御システムの構成について説明する。図1は、本実施形態の運転制御システムの一例を示す説明図である。図2は、実施形態にかかる車両制御装置が搭載された車両の概略構成を示すブロック図である。
10 車両
12、12a 信号機
14 インフラ情報送信装置
15 交通情報通信基地局
16 GPS衛星
19 車両制御装置
20 ECU
20a 駆動制御部
20b 経路検出部
20c 走行負荷演算部
20d 走行計画演算部
20e 運転支援制御部
22 記憶部
24 アクセルアクチュエータ
25a エンジン
25b MG(モータジェネレータ)
26 ブレーキアクチュエータ
28 カーナビゲーション装置
30 スピーカ
32 GPS通信部
38 インフラ通信部
40 車速センサ
42 表示装置
44 ハイブリッドECU
46 電池アクチュエータ
Claims (10)
- 車両を制御する車両制御装置であって、
目的地までの経路を検出する経路検出部と、
前記経路の走行負荷情報を算出する走行負荷演算部と、
前記経路と当該経路の走行負荷情報とに基づいて前記経路の各区間の駆動モードを含む走行計画を算出する走行計画演算部と、を有し、
前記走行負荷演算部は、現在地から目的地までの距離に応じて、走行負荷情報を算出する前記区間の詳細度を変更することを特徴する車両制御装置。 - 前記走行負荷演算部は、前記現在地から目的地までの距離が閾値距離よりも長い場合、少なくとも一部の区間を、前記現在地から目的地までの距離が閾値距離よりも短い場合の詳細度よりも荒い詳細度で前記走行負荷情報を算出することを特徴とする請求項1に記載の車両制御装置。
- 前記走行負荷演算部は、前記現在地から前記目的地までの距離が閾値距離よりも長い場合、途中の区間の詳細度を、前記現在地の近傍及び前記目的地の近傍の区間の詳細度よりも荒くすることを特徴とする請求項2に記載の車両制御装置。
- 前記走行負荷演算部は、前記現在地から目的地までの距離が閾値距離よりも長い場合、少なくとも一部の区間を、前記現在地から目的地までの距離が閾値距離よりも短い場合よりも荒い詳細度で前記走行負荷情報を算出した後、
前記少なくとも一部の区間を、より細かい詳細度で前記走行負荷情報を算出し、
前記走行計画演算部は、前記走行負荷情報が更新された場合、更新された前記走行負荷情報に基づいて、前記走行計画を更新することを特徴とする請求項1から3のいずれか一項に記載の車両制御装置。 - 前記走行計画演算部で算出した走行計画を運転者に通知する走行支援部をさらに有することを特徴とする請求項1から4のいずれか一項に記載の車両制御装置。
- 前記車両は、モータジェネレータと内燃機関とを備えるハイブリッド車両であり、
前記走行計画演算部は、前記駆動モードとして、前記モータジェネレータを駆動源として走行するEVモードと、前記モータジェネレータと前記内燃機関とを駆動源として走行するハイブリッド走行モードと、を選択可能であることを特徴とする請求項1から5のいずれか一項に記載の車両制御装置。 - 前記走行計画演算部は、前記現在地から目的地までの距離が閾値距離よりも短い場合の詳細度よりも荒い詳細度の前記走行負荷情報を含む場合、EVモードを選択しやすい条件で前記走行計画を算出することを特徴とする請求項6に記載の車両制御装置。
- 前記走行負荷演算部は、前記現在地から目的地までの距離が設定距離よりも長い場合、前記目的地までの経路の途中地点までの前記走行負荷情報を算出することを特徴とする請求項1から7のいずれか一項に記載の車両制御装置。
- 前記車両は、モータジェネレータと内燃機関とを備えるハイブリッド車両であり、
前記走行計画演算部は、前記駆動モードとして、前記モータジェネレータを駆動源として走行するEVモードと、前記モータジェネレータと前記内燃機関とを駆動源として走行するハイブリッド走行モードと、を選択可能であり、
前記走行負荷情報を算出している区間が、前記目的地までの経路の途中地点までの場合、前記途中地点への到達時の目標SOCを高い値に設定することを特徴する請求項8に記載の車両制御装置。 - 前記走行負荷演算部は、前記詳細度が荒い場合、前記区間を前記詳細度が細かい場合よりも長い距離とすることを特徴とする請求項1から9のいずれか一項に記載の車両制御装置。
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DE112012005988.3T DE112012005988B4 (de) | 2012-03-08 | 2012-03-08 | Fahrzeugsteuervorrichtung |
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