JP4888315B2 - Acceleration information generator - Google Patents

Description

  The present invention relates to an acceleration information generation device that generates acceleration information from vehicle speed information detected as a vehicle travels.

Conventionally, route data traveled by a vehicle and travel data when traveling along this route (fuel consumption, required time, average vehicle speed) are stored in a database, and travel data corresponding to the currently traveled route is stored from this database. There is an apparatus for extracting and outputting (see, for example, Patent Document 1).
JP 2006-3147 A

  The device described in Patent Document 1 has a configuration in which an average vehicle speed detected using a vehicle speed sensor is stored in a database, and an average vehicle speed corresponding to a currently traveling route is extracted from the database and output. . In such an apparatus, vehicle speed information is managed not as data for the time axis but as data for the distance axis so that the relationship between the travel point and the vehicle speed can be grasped. That is, the vehicle speed information is managed as data representing the relationship between the vehicle speed and the travel distance as shown in FIG. 9B, not as data representing the relationship between the vehicle speed and time as shown in FIG. 9A. .

  Incidentally, the acceleration of the vehicle can be easily calculated by differentiating the vehicle speed with respect to time. Specifically, the acceleration a of the vehicle can be calculated using a = dV / dt, where v is the vehicle speed and t is the time.

  However, in the apparatus as described in Patent Document 1, vehicle speed information is managed as data representing the relationship between the vehicle speed and the travel distance as shown in FIG. There is a problem that a cannot be easily calculated.

  The present invention has been made in view of the above points, and an object of the present invention is to make it possible to estimate acceleration from vehicle speed information representing a relationship between a vehicle speed detected as a vehicle travels and a travel distance.

The first feature of the present invention is that storage means for storing vehicle speed information representing the relationship between the vehicle speed detected as the vehicle travels and the travel distance, and vehicle speed information representing the relationship between the vehicle speed and the travel distance stored in the storage means. Vehicle speed information converting means for converting the vehicle speed and the traveling time into vehicle speed information, and the acceleration for each predetermined time interval from the vehicle speed information representing the relationship between the vehicle speed and the traveling time converted by the vehicle speed information converting means. Acceleration calculation means for calculating acceleration information to be expressed , and acceleration information conversion means for converting acceleration information representing acceleration at predetermined time intervals calculated by the acceleration calculation means into acceleration information representing the relationship between acceleration and travel distance It is to have.

In such a configuration, the vehicle speed information representing the relationship between the vehicle speed and the travel distance is converted into the vehicle speed information representing the relationship between the vehicle speed and the travel time, and predetermined from the converted vehicle speed information representing the relationship between the vehicle speed and the travel time. Since the acceleration information representing the acceleration for each time interval is calculated, the acceleration can be estimated from the vehicle speed information representing the relationship between the vehicle speed detected as the vehicle travels and the travel distance. In addition, since acceleration information representing acceleration at predetermined time intervals is converted into acceleration information representing the relationship between acceleration and travel distance, it is possible to easily recognize the acceleration at each travel point.

The second feature of the present invention is that the vehicle speed information conversion means calculates the vehicle speed at regular time intervals from the vehicle speed information representing the relationship between the vehicle speed and the travel distance stored in the storage means, and the relationship between the vehicle speed and the travel time. Vehicle speed information representing

  As described above, the vehicle speed information representing the relationship between the vehicle speed and the travel time can be specified by calculating the vehicle speed for each predetermined time interval from the vehicle speed information representing the relationship between the vehicle speed and the travel distance.

Further, the third feature of the present invention is that the vehicle speed information conversion unit is configured to change the vehicle speed before the fixed time elapses from the vehicle speed information indicating the relationship between the vehicle speed and the travel distance stored in the storage unit. By extracting the vehicle speed and interpolating these two vehicle speeds, the vehicle speed at the time when a certain time has elapsed is calculated.

  In this manner, the vehicle speed before the fixed time elapses and the vehicle speed after the fixed time are extracted from the vehicle speed information representing the relationship between the vehicle speed and the travel distance, and the fixed time elapses by interpolating these two vehicle speeds. The vehicle speed at that time can be calculated.

According to a fourth feature of the present invention, the acceleration calculating means calculates acceleration information representing acceleration at fixed time intervals from the vehicle speed information representing the relationship between the vehicle speed and the travel time calculated by the vehicle speed information converting means. is there.

  In this way, acceleration information representing acceleration at certain time intervals can be calculated from vehicle speed information representing the relationship between vehicle speed and travel time.

Further, according to a fifth feature of the present invention, the acceleration calculating means extracts two vehicle speeds at fixed time intervals from the vehicle speed information representing the relationship between the vehicle speed and the traveling time calculated by the vehicle speed information converting means. Is to calculate the acceleration at certain time intervals from the vehicle speed.

  As described above, two vehicle speeds at a constant time interval can be extracted from the vehicle speed information representing the relationship between the vehicle speed and the travel time, and the acceleration at each constant time interval can be calculated from the two vehicle speeds.

According to a sixth feature of the present invention, the acceleration information converting means is configured to obtain a constant distance from an acceleration before reaching a certain distance from acceleration information representing an acceleration for each predetermined time interval calculated by the acceleration calculating means. The acceleration after reaching is extracted, and the acceleration at a point reaching a certain distance is calculated from these two accelerations.

  In this way, the acceleration before reaching a certain distance and the acceleration after reaching the certain distance are extracted from the acceleration information representing the acceleration at predetermined time intervals, and the certain distance is reached from these two accelerations. The acceleration at the point can be calculated.

  FIG. 1 shows a schematic configuration of a hybrid vehicle equipped with an acceleration information generation device according to an embodiment of the present invention. In this hybrid vehicle, an engine 1, a generator 2, a motor 3, a differential device 4, a tire 5a, a tire 5b, an inverter 6, a DC link 7, an inverter 8, a battery 9, and an HV control unit 10 are mounted. In addition, a navigation device having a GPS sensor 11, a direction sensor 12, a vehicle speed sensor 13, a map DB storage unit 14, and a navigation ECU 20 is mounted on the hybrid vehicle. The acceleration information generation device according to the present embodiment is configured by this navigation device.

  The hybrid vehicle runs using the engine 1 and the motor 3 as power sources. When the engine 1 is used as a power source, the rotational force of the engine 1 is transmitted to the tires 5a and 5b via a clutch mechanism and a differential device 4 (not shown). When the motor 3 is used as a power source, the DC power of the battery 9 is converted into AC power via the DC link 7 and the inverter 8, and the motor 3 is operated by the AC power. It is transmitted to the tires 5a and 5b via the differential device 4.

  The rotational force of the engine 1 is also transmitted to the generator 2, and the generator 2 generates AC power by the rotational force, and the generated AC power is converted into DC power via the inverter 6 and the DC link 7. The DC power may be stored in the battery 9 in some cases. Such charging of the battery 9 is charging by the operation of the engine 1 using fuel. Hereinafter, this type of charging is referred to as internal combustion charging.

  Further, when the hybrid vehicle decelerates by a braking mechanism (not shown), a resistance force at the time of deceleration is applied to the motor 3 as a rotational force, and the motor 3 generates AC power by this rotational force. It is converted into direct current power via the DC link 7, and the direct current power is stored in the battery 9. Hereinafter, this type of charging is referred to as regenerative charging.

  Further, the battery 9 is connected to a power source outside the hybrid vehicle (for example, a power source supplied via a household outlet), thereby receiving power from the external power source and accumulating the received power. Hereinafter, this type of charging is referred to as plug-in charging.

  The HV control unit 10 controls execution / non-execution of the above-described operations of the generator 2, the motor 3, the inverter 6, the inverter 8, and the battery 9 in accordance with a command from the navigation ECU 20. The HV control unit 10 may be realized using a microcomputer, for example, or may be hardware having a dedicated circuit configuration for realizing the following functions.

More specifically, the HV control unit 10 performs the following processes (A) and (B).
(A) Based on a command from the navigation ECU 20, the timing of assist travel and internal combustion charging is switched.
(B) The current SOC is periodically notified to the navigation ECU 20.

  The SOC (State of Charge) is an index representing the remaining amount of the battery, and the higher the value, the greater the remaining amount. The current SOC indicates the current SOC of the battery 9. The HV control unit 10 repeatedly updates the current SOC value by sequentially detecting the state of the battery 9.

  The GPS sensor 11, the azimuth sensor 12, and the vehicle speed sensor 13 are well-known sensors that specify the position, traveling direction, and traveling speed of the hybrid vehicle, respectively. The map DB storage unit 14 is a storage medium that stores map data.

  The map data has node data corresponding to each of a plurality of intersections, and link data corresponding to each of road sections or links connecting the intersections. One node data includes an identification number of the node, location information, and type information. One link data includes an identification number of the link (hereinafter referred to as a link ID), position information, type information, and the like.

  Here, the position information of the link includes the location data of the shape complement point included in the link and the data of the segment connecting two adjacent nodes and the shape complement points at both ends of the link. The data of each segment includes information such as the segment ID of the segment, the direction of the segment, and the length.

  As shown in FIG. 2, the navigation ECU 20 includes a RAM 21, a ROM 22, a durable storage medium 23 into which data can be written, and a control unit 24. The durable storage medium is a storage medium that can keep data even when the main power supply of the navigation ECU 20 is stopped. Examples of the durable storage medium 23 include a non-volatile storage medium such as a hard disk, a flash memory, and an EEPROM, and a backup RAM.

  The control unit 24 executes the program read from the ROM 22 or the durable storage medium 23, reads information from the RAM 21, the ROM 22, and the durable storage medium 23 when executing the program, and stores information on the RAM 21 and the durable storage medium 23. Writing is performed, and signals are exchanged with the HV control unit 10, the GPS sensor 11, the direction sensor 12, the vehicle speed sensor 13, the map DB storage unit 14, and the like.

  Specifically, the control unit 24 executes a predetermined program for the route calculation process 30, the navigation process 40, the learning control process 100, the acceleration information calculation process 200, the charging plan process 300, the travel time process 400, and the like. It will be realized.

  In the route calculation process 30, the control unit 24 determines an optimal route to the designated destination using map data based on the destination designation by the user using an operation device (not shown).

  In the navigation process 40, the control unit 24 displays a guide display for causing the hybrid vehicle to travel along a route to the destination point determined by the route calculation process 30 (hereinafter referred to as a guide route; corresponding to an example of a planned route). This is performed for the driver using an image display device, a speaker, etc. (not shown).

  In the learning control process 100, the control unit 24 stores, in the durable storage medium 23, the road on which the hybrid vehicle has traveled and the history of travel conditions that affect the power consumption of the battery 9 during travel on the road for each segment. . FIG. 3 shows a flowchart of the learning control process 100. In this process, the same segment is treated as a different segment if the traveling direction is different.

  The control unit 24 repeatedly executes the learning control process 100 shown in this figure, and in each iteration, first, at step 110, information on the current traveling state is acquired. The traveling state refers to information on one or both of the external environment during traveling and the vehicle behavior during traveling. The information acquired as the travel status information includes, for example, the link ID of the currently traveling link, the segment ID of the currently traveling segment, the current vehicle direction, the current vehicle speed, the road type of the link, the segment Including electricity consumption.

  Here, the link ID and the segment ID can be specified by collating the current position information from the GPS sensor 11 with the map data information from the map DB storage unit 14. Further, the direction of the vehicle can be acquired from the direction sensor 12. Further, the current vehicle speed can be acquired from the vehicle speed sensor 13. The road type of the road is acquired from the map data. Further, the travel distance in the link may be calculated using the output of the vehicle speed sensor.

  In step 140, the existing learning information is read out. Specifically, if the history information of the running status for the segment ID acquired in step 110 is in the durable storage medium 23, it is read out.

  Subsequently, in step 150, the segment information read in step 140 and the travel status information of the segment newly acquired in step 110 are combined and optimized. As the optimization, for example, a method of calculating an average of read information and newly acquired information may be employed. If there is no running history history for the segment in step 140, in step 150, the data itself acquired in step 110 is used as optimized data. Since the optimized traveling state data includes the segment ID, the road is associated with the traveling state information on the road.

  Subsequently, in step 160, the optimized data is stored in the durable storage medium 23 as a history of a new traveling state for the segment, that is, as learning information. After step 160, one execution of the learning control process 100 ends.

  By executing the learning control process 100 as described above, the history of the driving situation for each segment is stored in the durable storage medium 23. For example, vehicle speed information representing the relationship between the vehicle speed and the travel distance is stored in the durable storage medium 23.

  Further, in step 160, the control unit 24 stores information on what route the host vehicle has traveled (hereinafter referred to as a route history) as a part of the learning information every time the host vehicle travels. 23. Specifically, every time the vehicle travels (for example, from engine start to engine off), information on the date and time of the travel, the order of the links passed in the travel, and the destination (that is, the end point of the travel), It is stored in the durable storage medium 23 as learning data of a well-known Bayesian network model.

  Next, the acceleration information calculation process 200 for calculating the acceleration of the vehicle from the vehicle speed information representing the relationship between the vehicle speed and the travel distance stored in the durable storage medium 23 by the learning control process 100 will be described.

  FIG. 4 shows a flowchart of the acceleration information calculation process 200. When the acceleration calculation section is specified and the start of the acceleration information calculation process 200 is instructed, the control unit 24 starts the acceleration information calculation process 200. In the acceleration information calculation process 200, the control unit 24 executes the respective processes in the order of the vehicle speed information conversion process (210), the acceleration calculation process (S240), and the acceleration information conversion process (260), and expresses acceleration information representing the acceleration of the vehicle. Is calculated.

  FIG. 5 shows a flowchart of the vehicle speed information conversion process 210. In the vehicle speed information conversion process 210, first, vehicle speed information is read from the durable storage medium 23 (212). The durable storage medium 23 stores vehicle speed information representing the relationship between the vehicle speed and the travel distance. The vehicle speed information in the acceleration calculation section is read from the durable storage medium 23.

Next, initialization processing is performed (214). Specifically, variable n = 0, variable j = 0, holding travel time S = 0, holding vehicle speed V = 0, and travel distance L _n−1 = 0 are set.

  Next, it is determined whether or not the processing in steps 218 to 230 has been performed on all the vehicle speed information in the acceleration calculation section read in step 212 (216). In the present vehicle speed information conversion process 210, the processes in steps 218 to 230 are sequentially performed on all the vehicle speed information in the acceleration calculation section, and the steps 218 to 218 are performed on all the vehicle speed information in the acceleration calculation section. It is determined whether or not the process of step 230 has been performed.

Here, since the processing of step 218 to step 230 has not been performed for all the vehicle speed information in the acceleration calculation section, the determination of step 216 is NO, and then the first vehicle speed information read in step 212. The travel time is calculated from the data (218). The travel time can be calculated by dividing the travel distance by the vehicle speed. That is, the travel distance _{L n} of the current read data, the travel distance _{L n-1} of the data read last time, when the vehicle speed and _{V n,} the running time _{S n is,} S n _{= (L} n -L _n it can be calculated as a _-1) / _{V n.} Here, the travel time S ₀ = L ₀ / V ₀ is calculated with the travel distance L _n−1 = 0.

Next, it is determined whether the difference between the current travel time and the previous travel time is equal to or greater than a unit time (1 second) (220). Specifically, the traveling time calculated at step 218 S _n, the retention running time S, the unit time as 1 second, it is determined whether S n _-S> 1 or. Here, it is determined whether S ₀ > 1 with S = 0.

  If the difference between the current travel time and the previous travel time is less than the unit time, the process proceeds to step 230, the value of the variable n is increased by 1 (230), and the process returns to step 216. And the process of step 213,218 is performed with respect to the 2nd data of the vehicle speed information read in step 212. FIG.

If such a process is repeated and the difference between the current travel time and the previous travel time is equal to or greater than the unit time, the determination in step 220 is YES, and then the developed vehicle speed V _j is calculated (222). The deployed vehicle speed V _j is a vehicle speed at each time point when a unit time elapses, such as 1 second, 2 seconds, 3 seconds, and so on, with reference to the start point of the acceleration calculation section. The developed vehicle speed V _j is extracted from the vehicle speed information, the vehicle speed before the unit time (1 second) elapses (corresponding to the holding vehicle speed V) and the vehicle speed after the fixed time elapses (corresponding to the vehicle speed V _n ). The vehicle speed at the time when the unit time (1 second) has elapsed by interpolating these two vehicle speeds can be obtained. Specifically, the deployed vehicle speed V _j is V _j = (V _n −, where V _n is the vehicle speed, V is the holding vehicle speed, S _{n is} the traveling time, S is the holding traveling time, and T = 1 second. V) / (S _n −S) × 1 + V.

Then, replace the retention running time S replacing the travel time _{S n} calculated in step 218 (224), a holding vehicle speed V in the deployed vehicle speed _{V j} calculated in step 222 (226).

  Next, the value of the variable j is increased by 1 (228), the value of the variable n is increased by 1 in step 230, and then the process returns to step 216.

By repeating the above-described processing, the developed vehicle speed V _j at each time point when the unit time elapses, such as 1 second, 2 seconds, 3 seconds,..., Is calculated sequentially with reference to the start point of the acceleration calculation section. Thus, the vehicle speed information representing the relationship between the vehicle speed and the travel distance is converted into the vehicle speed information representing the relationship between the vehicle speed and the travel time. Note that vehicle speed information indicating the relationship between the vehicle speed and the travel distance is stored in the RAM 21.

  Then, when the processing of step 218 to step 230 has been performed on all the vehicle speed information in the acceleration calculation section, the determination of step 216 is YES, and this processing ends.

  Returning to the description of FIG. 4, when the vehicle speed information representing the relationship between the vehicle speed and the travel distance is converted into the vehicle speed information representing the relationship between the vehicle speed and the travel time by the vehicle speed information conversion processing 210 described above, the acceleration calculation processing 240 is performed. To implement.

  FIG. 6 shows a flowchart of the acceleration calculation process 240. In the acceleration calculation process 240, first, vehicle speed information representing the relationship between the vehicle speed and the travel distance stored in the RAM 21 is read (242).

Next, initialization processing is performed (244). Specifically, a variable n = 0, a variable j = 0, and a developed vehicle speed V _j−1 = 0 are set.

  Next, it is determined whether or not the processing in steps 248 and 250 has been performed on all the vehicle speed information in the acceleration calculation section read in step 242 (246). In the present acceleration calculation process 240, the processes of steps 248 and 250 are sequentially performed on all the vehicle speed information in the acceleration calculation section read in step 242. On the other hand, it is determined whether or not the processing of steps 248 and 250 has been sequentially performed.

Here, since the processing of steps 248 and 250 is not performed for all the vehicle speed information in the acceleration calculation section, the determination of step 246 is NO, and then the first vehicle speed information read in step 242 is determined. An acceleration is calculated from the data (248). The acceleration _An is defined as A _n = (V _n −V _{n−1) when} the developed vehicle speed of the data read this time is V _n , the developed vehicle speed of the data read last time is V _n−1 , and the unit time T = 1 second. ) / 1.

  Next, the value of the variable n is increased by 1 (250), and the process returns to step 246. Then, the processes in steps 248 and 250 are performed on the second data of the vehicle speed information read in step 242.

By repeating the process described above, one second after the start of the acceleration calculation section as a reference, after 2 seconds, 3 seconds, ..., acceleration A _n of each time the unit time such elapses are sequentially calculated. In this way, acceleration information representing acceleration at certain time intervals is calculated from vehicle speed information representing the relationship between vehicle speed and travel time. The acceleration information is stored in the RAM 21.

  When the processing of steps 248 and 250 is completed for all the vehicle speed information in the acceleration calculation section, the determination at step 246 is YES, and this processing ends.

Returning to the description of FIG. 4, when acceleration information representing acceleration at certain time intervals is calculated by the acceleration calculation processing 240 described above, the acceleration information is then converted into acceleration information representing the relationship between acceleration and travel distance. The acceleration information conversion process 260 is executed.

  FIG. 7 shows a flowchart of the acceleration information conversion process 260. In this acceleration information conversion processing 260, first, acceleration information is read from the RAM 21 (262).

  Next, initialization processing is performed (264). Specifically, variable n = 0, variable j = 0, holding travel distance L = 0, holding vehicle speed V = 0, and holding acceleration A = 0 are set.

  Next, it is determined whether or not the processing in steps 268 to 290 has been performed on all acceleration information read in step 262 (266).

Here, since the processing of steps 268 to 290 is not performed for all acceleration information, the determination of step 266 is NO, and then the travel distance is calculated. The travel distance can be calculated by dividing the vehicle speed by unit time. That is, if the read vehicle speed is V _n and the unit time T = 1 second, the travel distance L _n can be calculated as L _n = V _n / 1 = V _n .

Next, it is judged whether the difference distance of this time and the last time is larger than unit distance (1 meter) (270). Differential distance, current travel distance _{L n, L n-1} the travel distance of the last, if the unit distance and T = 1 meter difference metric is expressed as _{(L n -L n-1)} . Here, it is determined whether (L _n −L _n−1 )> 1.

  If the difference distance is equal to or less than the unit distance (1 meter), the determination in step 270 is NO, and then the value of the variable n is increased by 1 (272), and the process returns to step 266. And the process of steps 268-270 is performed with respect to the 2nd data of the acceleration information read in step 262. FIG.

When such a process is repeatedly performed and the difference distance becomes larger than the unit distance (1 meter), the determination in step 270 is YES, and then the time S when the unit distance (1 meter) has elapsed is calculated (274). ). Assuming that the acceleration is A _n and the unit time is T = 1, the time S when the unit distance (1 meter) has elapsed can be calculated as S = 1 / (A _n × 1).

Next, a differential speed and a differential acceleration are calculated (276). If the current vehicle speed is V _n and the holding vehicle speed is V, the differential speed can be calculated as V _n −V. If the current acceleration is _An and the holding acceleration is A, the differential acceleration can be calculated as _An- A.

  Next, it is determined whether or not the difference distance is larger than the unit distance (1 meter) (278).

If the difference distance is equal to or less than the unit distance, the determination in step 278 is NO and the process proceeds to S272. If the difference distance is greater than the unit distance, the determination in step 278 is YES, and then the deployed vehicle speed is calculated (280). The deployed vehicle speed V _j is V _j = (V _n −V) / 1 × S + V, where differential speed (V _n −V), unit time T = 1, S is the time when 1 meter elapses, and the holding vehicle speed is V. Can be calculated as

Next, a deployment acceleration is calculated (282). The developed acceleration A _j is the difference acceleration (A _n −A), the unit time T = 1, the time when 1 meter elapses is S, and the holding acceleration is A, A _j = (A _n −A) / 1 × S + A Can be calculated as

  Next, a value obtained by adding the unit distance to the retained travel distance is substituted into the retained travel distance L (284).

Next, the holding vehicle speed V is replaced with the developed vehicle speed V _j calculated at step 280, and the holding acceleration A is replaced with the developed acceleration A _j calculated at step 282 (286).

Next, the value of the variable j is incremented by 1 (288), the difference distance (L _n −L _n−1 ) is replaced with the difference distance −1 (290), and the process returns to step 278.

By repeating the above processing, the acceleration A _{j at} each point reaching a unit distance of 1 meter, 2 meters, 3 meters,... Is sequentially calculated with reference to the starting point of the acceleration calculation section. The acceleration information is stored in the RAM 21.

  Then, when the processing of steps 268 to 290 is completed for all the acceleration information in the acceleration calculation section, the determination of step 266 is YES, and this processing ends. The acceleration information calculated in this way is stored in the durable storage medium 23 as learning information.

FIG. 8 shows a calculation example of vehicle speed information and acceleration information calculated by the acceleration information calculation process 200 shown in FIG. (A) represents vehicle speed information representing the relationship between the vehicle speed and the travel distance stored in the durable storage medium 23. This vehicle speed information is converted into vehicle speed information representing the relationship between the vehicle speed and the travel time as shown in FIG. Further, the acceleration calculation processing 240 calculates acceleration information representing acceleration at regular time intervals as shown in (c) from the vehicle speed information representing the relationship between the vehicle speed and the travel time. Further, the acceleration information conversion processing 260 converts the acceleration information into acceleration information representing the relationship between acceleration and travel distance as shown in (d). In FIGS. 8C and 8D, vehicle speed information is superimposed and displayed for comparison.

  As described above, the acceleration information calculation process 200 shown in FIG. 4 is used to obtain the acceleration as shown in FIG. 8C from the vehicle speed information indicating the relationship between the vehicle speed and the travel distance as shown in FIG. The acceleration information that represents the acceleration is calculated, and the acceleration information that represents the acceleration at each point as shown in FIG. 8D is calculated.

  Returning to the description of FIG. 2, in the charging plan processing 300, an SOC management plan is created as a charging plan in the planned section together with a schedule of the vehicle traveling method in the section. Specifically, first, in each segment in the planned section, how much energy is required when traveling in that segment is calculated from the learning information in the planned section, and the learning information and the acquired reference SOC are calculated. Based on this information, an optimum traveling method is determined for each segment to the destination, and an SOC management plan is created based on the learning information.

  When the control unit 24 determines that the destination point and the guide route to the destination point have been determined, the charging plan processing 300 has been executed for the scheduled route, and the hybrid vehicle is running, Process 400 is executed.

  In the running process 400, the control unit 24 reads out the target SOC corresponding to the current position from the current SOC management plan and transmits it to the HV control unit 10. By receiving the target SOC, the HV control unit 10 controls the traveling method of the vehicle so as to follow the SOC management plan derived from the traveling method based on the charging plan in the planned section. As a result, the HV control unit 10 can control the traveling method of the vehicle according to the charging plan, and can realize a reduction in fuel consumption.

  According to the configuration described above, the vehicle speed information representing the relationship between the vehicle speed and the travel distance is converted into the vehicle speed information representing the relationship between the vehicle speed and the travel time, and the vehicle speed information representing the relationship between the converted vehicle speed and the travel time is determined in advance. Since the acceleration information representing the acceleration for each time interval is calculated, the acceleration can be estimated from the vehicle speed information representing the relationship between the vehicle speed detected as the vehicle travels and the travel distance.

  In addition, since acceleration information representing acceleration at predetermined time intervals is converted into acceleration information representing the relationship between acceleration and travel distance, it is possible to easily recognize the acceleration at each travel point.

  In addition, this invention is not limited to the said embodiment, Based on the meaning of this invention, it can implement with a various form.

  For example, in the above-described embodiment, an example in which the acceleration information generation device is configured by the navigation device has been described. However, the acceleration information generation device may be configured without using the navigation device.

  Further, in the above embodiment, in the vehicle speed information conversion process 210, the vehicle speed information representing the relationship between the vehicle speed and the travel time is specified by calculating the vehicle speed at regular time intervals from the vehicle speed information representing the relationship between the vehicle speed and the travel distance. However, for example, the vehicle speed may be calculated by changing the time interval.

  Moreover, in the said embodiment, although the acceleration calculation process 240 showed the example which calculates the acceleration information showing the acceleration for every fixed time interval from the vehicle speed information showing the relationship between a vehicle speed and driving time, for example, changing a time interval is shown. Thus, acceleration information representing acceleration may be calculated.

  The correspondence between the configuration in the above embodiment and the configuration in the claims will be described. The durable storage medium 23 corresponds to the storage unit, the vehicle speed information conversion process 210 corresponds to the vehicle speed information conversion unit, and the acceleration calculation process. 240 corresponds to acceleration calculation means, and acceleration information conversion processing 260 corresponds to acceleration information conversion means.

It is a figure showing the schematic structure of the hybrid vehicle carrying the acceleration information generating device concerning one embodiment of the present invention. It is a figure which shows the structure of navigation ECU. It is a flowchart of a learning control process. It is a flowchart of an acceleration information calculation process. It is a flowchart of a vehicle speed information conversion process. It is a flowchart of an acceleration calculation process. It is a flowchart of an acceleration information conversion process. It is a figure which shows the example of calculation of the vehicle speed information calculated by an acceleration information calculation process, and acceleration information. It is a figure for demonstrating a subject.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Engine, 2 ... Generator, 3 ... Motor, 4 ... Differential gear, 5a, 5b ... Tire,
6, 8 ... inverter, 7 ... DC link, 9 ... battery, 10 ... HV control unit,
DESCRIPTION OF SYMBOLS 11 ... GPS sensor, 12 ... Direction sensor, 13 ... Vehicle speed sensor, 14 ... Map DB memory | storage part,
20: Navigation ECU.

Claims (6)

Storage means for storing vehicle speed information representing a relationship between a vehicle speed detected as the vehicle travels and a travel distance;
Vehicle speed information conversion means for converting the vehicle speed information representing the relationship between the vehicle speed and the travel distance stored in the storage means into vehicle speed information representing the relationship between the vehicle speed and the travel time;
Acceleration calculation means for calculating acceleration information representing acceleration at predetermined time intervals from vehicle speed information representing the relationship between the vehicle speed and travel time converted by the vehicle speed information conversion means;
Acceleration information conversion means for converting the acceleration information representing the acceleration for each predetermined time interval calculated by the acceleration calculation means into acceleration information representing the relationship between the acceleration and the travel distance. Acceleration information generating device. The vehicle speed information converting means calculates vehicle speed at regular time intervals from vehicle speed information representing the relationship between the vehicle speed and the travel distance stored in the storage means, and specifies vehicle speed information representing the relationship between the vehicle speed and the travel time. The acceleration information generating apparatus according to claim 1 , wherein The vehicle speed information conversion means extracts the vehicle speed before the fixed time has elapsed and the vehicle speed after the fixed time has elapsed from the vehicle speed information representing the relationship between the vehicle speed and the travel distance stored in the storage means, The acceleration information generating apparatus according to claim 2 , wherein the vehicle speed at the time when the predetermined time has elapsed is calculated by interpolating two vehicle speeds. The acceleration calculation means, claims 1 and calculates the acceleration information indicating acceleration at predetermined time intervals from the vehicle speed information indicative of a relation of the vehicle speed information conversion vehicle speed and travel time calculated by means 3 The acceleration information generation apparatus as described in any one of these. The acceleration calculation means extracts two vehicle speeds at the predetermined time interval from the vehicle speed information representing the relationship between the vehicle speed and the travel time calculated by the vehicle speed information conversion means, and the constant time interval is calculated from the two vehicle speeds. The acceleration information generating apparatus according to claim 4 , wherein the acceleration for each is calculated. The acceleration information converting means extracts the acceleration before reaching a certain distance and the acceleration after reaching the certain distance from the acceleration information representing the acceleration for each predetermined time interval calculated by the acceleration calculating means. and acceleration information generating apparatus according to any one of claims 1 to 5, characterized in that to calculate the acceleration of the point reaching the predetermined distance from the acceleration of the two points.

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