JP5206520B2 - Drive source stop device - Google Patents

Description

  The present invention provides an idle stop at an appropriate timing and period in a situation where the driver of the vehicle searches for an appropriate time to make a right turn at an intersection, particularly in a situation where the vehicle driver is searching for and waiting based on the presence or absence of an oncoming vehicle or the behavior of the oncoming vehicle. The present invention relates to a drive source stop device that controls a vehicle engine or the like that can execute the above.

  Conventionally, in accordance with a temporary stop of a vehicle at an intersection, an idle stop that temporarily stops a drive source such as an engine of the vehicle is executed to reduce the amount of exhaust gas containing carbon dioxide and the like. It is done to improve the fuel economy performance. In this case, for example, as described in Patent Document 1, traffic information represented by signal information including a signal switching period is acquired from an infrastructure such as a traffic signal installed at an intersection, and the vehicle temporarily stops at the intersection. In the case of stopping automatically, it has been proposed to automatically execute idle stop when stopping for a predetermined period of time or more occurs, and as described in Patent Document 2 It has been proposed to automatically execute an idle stop in a right turn standby state before a right turn.

JP 2000-045818 A JP 2001-289087 A

  However, in the method of automatically executing the idle stop as described in Patent Document 1 and Patent Document 2, the idle stop is not performed in consideration of the presence of the oncoming vehicle and the behavior of the oncoming vehicle. When the time for waiting for a right turn, that is, the waiting time changes due to the oncoming vehicle traveling in the lane facing the intersection, the idle stop cannot be performed properly, and the exhaust gas emission is reduced. There arises a problem that appropriate improvement in fuel efficiency cannot be realized yet.

  An object of this invention is to provide the drive source stop apparatus which can implement | achieve a more suitable idle stop in view of the said problem.

In order to solve the above problem, a drive source stop device according to the present invention includes a detecting means for detecting a position, a vehicle speed, and a blinker signal of an oncoming vehicle that enters an intersection where a vehicle enters, and the detected position and the vehicle speed. And a calculation means for calculating a right turn waiting time of the vehicle with respect to the oncoming vehicle based on the winker signal, and when the calculated waiting time is equal to or longer than a predetermined time, the driving source of the vehicle is stopped. the stop means seen including, said calculating means the right turn waiting time, when the turn signal signal is not detected, the time to reach the side of the oncoming vehicle is turning right lane, the turn signal signals the right is detected and zero if the, especially that in the case where the turn signal signals of the left has been detected that the time to reach the entrance of the lane that enters after the oncoming vehicle has left To.
Further, in order to solve the above problem, the drive source stop device according to the present invention, the intersection position of the cross-vehicle and vehicle speed and blinker signal and the vehicle enters from the right side of the vehicle to the intersection including a stop line to pause Detection means for detecting the presence / absence, position and speed of a pedestrian, a passing time when the crossing vehicle passes the intersection based on the detected position, the vehicle speed and the blinker signal, and a pedestrian of the intersection A calculating means for calculating both the walking time for the pedestrian to complete crossing the intersection based on the presence / absence, position and speed, and setting the longer of the two as the waiting time after the vehicle is temporarily stopped ; And a stop means for stopping the drive source of the vehicle when the calculated waiting time after the temporary stop is equal to or longer than a predetermined time.

  According to the drive source stop device of the present invention, whether the standby time is calculated based on the position of the intersecting vehicle, the vehicle speed, and the behavior of the blinker signal, and the drive source is stopped based on the standby time. Since it is possible to stop the drive source after determining whether or not the drive source is stopped when the standby time is relatively short, the vehicle may enter the intersection. It is possible to prevent the entry from being delayed due to timing.

  Further, conventionally, since the waiting time is not calculated based on the behavior of the intersecting vehicle, there are a plurality of intersecting vehicles, for example, and the waiting time is relatively long. However, the drive source cannot be stopped by effectively using the standby time, and the exhaust gas emission amount and the fuel efficiency of the vehicle cannot be sufficiently improved. According to the drive source stop device according to the above, since the standby time is calculated based on the behavior of the crossing vehicle, the drive source is calculated after the standby time is accurately calculated and the standby time is effectively used. Can be stopped. In addition, the vehicle described simply as the vehicle indicates the own vehicle, and is distinguished from the crossing vehicle, the oncoming vehicle, or the preceding vehicle.

When the crossing vehicle is an oncoming vehicle facing the vehicle and the vehicle enters the intersection for the purpose of making a right turn,
In order to solve the above problem, the drive source stop device according to the present invention is:
Detecting means for detecting the position, vehicle speed, and blinker signal of the oncoming vehicle that enters opposite the intersection where the vehicle enters for the purpose of making a right turn;
A calculation means for calculating a time until the oncoming vehicle moves to a position not hindering a right turn of the vehicle based on the detected position, the vehicle speed, and the blinker signal as a right turn waiting time of the vehicle;
When the calculated right turn waiting time is equal to or longer than a predetermined time, stop means for stopping the drive source of the vehicle can be included.

  Here, the detection means captures the oncoming vehicle that is installed on the roadside and faces the intersection where the vehicle enters for the purpose of making a right turn, and performs image processing to detect the position of the oncoming vehicle, the vehicle speed, and the Even if it is a roadside imaging means for detecting a blinker signal, the position of the oncoming vehicle is image-processed by imaging an oncoming vehicle that is installed on the vehicle side and enters opposite to an intersection where the vehicle enters for the purpose of making a right turn. Vehicle-side imaging means for detecting the vehicle speed and the blinker signal may be included, and both the road-side imaging means and the vehicle-side imaging means may be included.

  The road-side imaging unit and the vehicle-side imaging unit are, for example, object recognition camera sensors, and perform image processing such as binarization processing, density processing, luminance difference processing, and edge processing based on captured image information. The position of the oncoming vehicle, the vehicle speed, and the blinker signal can be detected.

  The time for the oncoming vehicle to move to a position that does not obstruct the right turn of the vehicle is the time to reach the side of the intersection where the right turn vehicle is stopped when the oncoming vehicle goes straight. When the oncoming vehicle makes a left turn, it is the time until the left turn is completed, and when the oncoming vehicle makes a right turn, it indicates the time until the right turn signal is generated.

  The detecting means may be a car navigation system mounted on the oncoming vehicle. In this case, the position and the vehicle speed of the oncoming vehicle are detected by GPS (Global Positioning System), and the oncoming vehicle is detected. The blinker signal is detected from, for example, a body ECU of the vehicle.

  Furthermore, the calculation means may be installed on the road side in the vicinity of the intersection, or may be installed on the vehicle side.

  When the calculation means is installed on the road side, the stop means is installed on the vehicle, and the detection means is a road-side imaging means installed on the road side, the drive source stop device is A first transmission means for transmitting a first data frame including the right turn waiting time calculated by the calculation means to the vehicle side, and receiving the first data frame and providing the first data frame to the stop means. A receiving means is included on the vehicle side.

  When the calculation means is installed on the road side, the stop means is installed in the vehicle, and the detection means is a car navigation system mounted on the oncoming vehicle, the drive source stop device Includes a second transmission means for transmitting a second data frame including the position, the vehicle speed, and the blinker signal to the road side, and receiving the second data frame from the oncoming vehicle side. A receiving means is included on the road side, a first transmission means for transmitting to the vehicle side a first data frame including a right turn waiting time calculated by the calculating means is included on the road side, and the first data frame is received and received First receiving means provided to the stopping means is included on the vehicle side.

  ADVANTAGE OF THE INVENTION According to this invention, the drive source stop apparatus which can implement | achieve a more suitable idle stop can be provided.

It is a block diagram showing one embodiment of a drive source stop device concerning the present invention. It is a schematic diagram which shows the aspect of the intersection where the drive source stop apparatus which concerns on this invention is applied. It is a flowchart which shows the control content of one Embodiment of the drive source stop apparatus which concerns on this invention. It is a schematic diagram which shows other embodiment of the drive source stop apparatus which concerns on this invention. It is a schematic diagram which shows the aspect of the road where the drive source stop apparatus which concerns on this invention is applied. It is a schematic diagram which shows the aspect of the intersection where the drive source stop apparatus which concerns on this invention is applied. It is a flowchart which shows the control content of one Embodiment of the drive source stop apparatus which concerns on this invention.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a block diagram showing an embodiment of a drive source stopping device according to the present invention. FIG. 2 is a schematic diagram showing an intersection mode and roadside equipment to which the drive source stopping device according to the present invention is applied. FIG. 3 is a flowchart showing the control contents of the drive source stopping device according to the present invention. FIG. 4 is a schematic view showing another embodiment of the drive source stopping device according to the present invention.

  As shown in FIG. 1, a portion installed on the vehicle C side of the drive source stopping device 1 includes an idle stop ECU 2 (Electronic Control Unit), an engine ECU 3, a battery charge state monitoring ECU 4, a navigation ECU 5, and infrastructure communication. The ECU 6 includes a temperature sensor 7 for detecting outside air temperature in the vehicle, a brake negative pressure detection pressure sensor 8, an acceleration sensor 9, a clutch stroke sensor 10, a brake stroke sensor 11, and a shift signal sensor 12. .

  The engine ECU 3, the battery charge state monitoring ECU 4, and the navigation ECU 5 are connected to the idle stop ECU 2 by CAN. The navigation ECU 5 is connected to a GPS antenna (Global Positioning System), a yaw rate sensor, a receiver, a database, a display, a speaker, and a touch panel (not shown).

  As shown in FIG. 2, the portion installed on the road side of the drive source stop device 1 includes a camera 13 and a computer 14. The camera 13 is an object recognition camera sensor including, for example, a microcomputer that can execute image processing. As shown in FIG. 2, for example, the camera 13 is installed immediately above the connection point of the opposite lane at the intersection to Capture as an imaging range, perform binarization processing, density processing, luminance difference processing, edge processing, etc. based on the captured image information, detect the presence or absence of the oncoming vehicle OC, the position of the oncoming vehicle OC, the vehicle speed, In particular, it is detected by the luminance difference processing that either the left or right turn signal lamp of the oncoming vehicle is lit, and the presence or absence of either the left or right turn signal is detected based on the detection of the turn signal lamp lighting. That is, the camera 13 constitutes the detection means 13a.

  The computer 14 includes, for example, a CPU, a ROM, a RAM, and a data bus and an input / output interface that connect them to each other, and functions as calculation means 14a that performs each control described below in accordance with a program stored in the ROM. . At the same time, the computer 14 also functions as first transmission means 14b that controls a transmitter and a receiver (not shown) to realize road-to-vehicle communication based on a narrow-band wireless communication method such as a spread spectrum method.

  The calculation means 14a detects the position of the oncoming vehicle OC and the white line of the right turn lane located on the opposite side of the oncoming vehicle OC at the intersection when the winker signal is not detected by the detecting means 13a. By dividing the distance from the installation position by the vehicle speed of the oncoming vehicle OC, a time until the oncoming vehicle OC reaches the side of the right turn lane is calculated, and this time is set as a right turn waiting time TW of the vehicle.

  When the right turn signal of the oncoming vehicle OC is detected by the detection means 13a, that is, when the oncoming vehicle OC turns to the right, the calculation means 14a detects that the oncoming vehicle OC is detected when the right turn signal is detected. Assuming that the vehicle C has moved to a position that does not inhibit the right turn, the right turn waiting time TW is set to zero.

  Further, when the detection means 13a detects the left blinker signal of the oncoming vehicle, that is, when the oncoming vehicle OC makes a left turn, the calculation means 14a turns the left position of the oncoming vehicle OC and the oncoming vehicle at the intersection. Divide the distance from the position of the entrance of the lane to enter later by the vehicle speed of the oncoming vehicle OC and the vehicle speed at the time of the left turn estimated from the predicted path curvature at the time of the left turn, and the time until the oncoming vehicle OC finishes the left turn This time is calculated as the right turn waiting time TW of the vehicle C.

  The first transmission unit 14b transmits the first data frame including the right turn waiting time TW calculated by the calculation unit 14a and the blinking light of the right turn arrow signal of the traffic signal at the intersection to the target area based on controlling the transmitter. .

  The idle stop ECU 2 includes, for example, a CPU, a ROM, a RAM, a data bus that connects them to each other, and an input / output interface, and according to a program stored in the ROM, a stop unit 2a that performs each control described below, a start It functions as the means 2b.

  The engine ECU 3 includes, for example, a CPU, a ROM, a RAM, a data bus that connects them to each other, and an input / output interface. According to a program stored in the ROM, the valve opening / closing timing of the engine that constitutes a drive source (not shown), The engine speed is mainly controlled by controlling the fuel ratio, the fuel injection amount, etc., and the engine is stopped based on the ignition key not shown or the stop command of the stop means 2a of the idle stop ECU 2, and the ignition key is turned on. Alternatively, the engine (not shown) is started based on the start command of the start means 2b of the idle stop ECU 2.

  The battery charge state monitoring ECU 4 includes, for example, a CPU, a ROM, a RAM, a data bus and an input / output interface for interconnecting them, and is detected by an ammeter installed in a battery (not shown) according to a program stored in the ROM. The amount of charge of the battery is calculated to calculate the amount of charge of the battery, and when the amount of charge falls below the lower limit value, the field current of the alternator (not shown) is controlled to rotate the crankshaft of the engine as the driving force. The power generation amount to be controlled is controlled so that the charge amount of the battery is not less than the lower limit value.

  The navigation ECU 5 includes, for example, a CPU, a ROM, a RAM, and a data bus and an input / output interface that connect them, and in accordance with a program stored in the ROM, a search unit 5a that performs each control described below, and a display unit It functions as 5b.

  The GPS antenna receives radio waves from three of a plurality of satellites over the earth, and based on these radio waves, the search means 5a of the navigation ECU 5 uses the current principle of the vehicle C based on the principle of triangulation, for example. Measure the position, ie longitude and latitude. The yaw rate sensor detects the yaw rate of the vehicle C, the touch panel is an input device for a driver to input search conditions such as a destination, and the database is configured by a storage medium such as a CD-ROM or a DVD-ROM, Map information for display and map information for search are stored and stored.

  Further, the display displays the route searched by the search means 5a of the navigation ECU 5 based on the inputted destination together with the map information for display based on the command of the display means 5b.

  In addition, the receiver is compliant with optical or radio beacons and receives traffic information from VICS (Vehicle Information & Communication System), that is, traffic jam information, road width information, disaster and accident occurrence information. To do.

  The search means 5a of the navigation ECU 5 calculates the moving distance and direction of the vehicle C based on the vehicle speed and steering angle acquired from the CAN and the yaw rate detected by the yaw rate sensor, and calculates the current position of the vehicle C by autonomous navigation. The measurement is complemented with the measurement of the current position of the vehicle C by the principle of triangulation, and the measurement accuracy of the position of the total vehicle C is increased.

  The display means 5b of the navigation ECU 5 includes the map information for display in the database, the position of the vehicle C detected by the above-described method, the destination input by the touch panel, and the route searched by the search means 5a. Is also displayed on the display.

  The infrastructure communication ECU 6 includes, for example, a CPU, a ROM, a RAM, a data bus that connects them, and an input / output interface. The infrastructure communication ECU 6 controls a transmitter and a receiver (not shown) according to a program stored in the ROM. Road-to-vehicle communication and vehicle-to-vehicle communication by the narrow-area wireless communication method using the spread method are realized, and the first transmission unit 14b of the computer 14 receives the first data frame transmitted to the target area. That is, the infrastructure communication ECU 6 functions as the first receiving means 6a.

  The temperature sensor 7 for detecting the temperature inside and outside the vehicle is provided inside and outside the vehicle C, detects both the temperature inside and outside the vehicle, and outputs the detection result to the idle stop ECU 2. The brake negative pressure detection pressure sensor 8 is supplied to a booster that generates a master cylinder pressure based on a force increased by increasing a depressing force of a brake pedal of a brake device (not shown), and a negative pressure from an engine (not shown). Is detected, and the detection result is output to the idle stop ECU 2.

  The acceleration sensor 9 is provided in the center of the floor of the vehicle C, detects the acceleration of the vehicle C, and outputs the detection result to the idle stop ECU 2. When the transmission of the vehicle C is a manual transmission, the clutch stroke sensor 10 detects a clutch stroke (not shown) and outputs a detection result to the idle stop ECU 2.

  The brake stroke sensor 11 detects a stroke of a brake pedal (not shown) and outputs the detection result to the idle stop ECU 2. The shift signal sensor 12 is provided inside a transmission ECU (not shown), detects a shift signal of the transmission controlled by the transmission ECU, and outputs the detection result to the idle stop ECU 2.

  Stop means 2a of idle stop ECU 2 is included in a first data frame received by first receiving means 6a of infrastructure communication means ECU 6 after acquiring a right blinker signal transmitted from a body ECU (not shown) on CAN. When the right turn waiting time TW is equal to or longer than a predetermined time TC of, for example, 30 seconds, a stop command for stopping the engine (not shown) is output to the engine ECU 3, and the engine ECU 3 stops the engine based on the stop command.

  The start means 2b of the idle stop ECU 2 prompts the engine to start the engine immediately at a timing, for example, 0.3 seconds before the right turn waiting time TW elapses after the stop means 2a outputs a stop command. It outputs to ECU3. At the same time, the starter 2b outputs a start command for starting the engine to the engine ECU 3 when the right turn arrow signal included in the first data frame is lit.

  The stopping means 2a is configured such that the acceleration detected by the acceleration sensor 9 is zero when the vehicle C is stopped except when the vehicle C makes a right turn, that is, when the vehicle speed acquired from the brake ECU 3 is an extremely low vehicle speed of, for example, 5 km / h or less. If the start of clutch engagement is detected based on the stroke of the clutch stroke sensor 10, the engine ECU 3 is also detected when release of the brake pedal is detected from the brake pedal stroke of the brake stroke sensor 11. A stop command is output to

  Even when the vehicle C is stopped, if the temperature inside and outside the vehicle detected by the temperature sensor 7 for detecting the outside temperature of the passenger compartment is an extremely low temperature, for example, lower than 5 degrees, the stopping means 2a is provided with the engine ECU 3 The engine idling is continued without outputting the stop command.

  When the negative pressure in the booster of the brake device detected by the brake negative pressure detection pressure sensor 8 is lower than the specified value, the stop means 2a is used when the vehicle C is stopped. However, the engine idling is continued without outputting a stop command to the engine ECU 3.

  Further, when the vehicle C stops while the vehicle C is traveling straight, the stop means 2a acquires a data frame including signal information of the intersection from the roadside computer 14 through road-to-vehicle communication via the infrastructure communication ECU 6. Then, the stop time is calculated, and a stop command is output to the engine ECU 3 when the stop time is equal to or longer than the predetermined time TC as compared with the predetermined time TC described above.

  In addition, as shown in FIG. 2, when the preceding vehicle FC exists between the vehicle C and the right turn lane, the preceding vehicle FC is equipped with an infrastructure communication ECU 6 that enables inter-vehicle communication. If it is determined from the position and speed of the preceding vehicle FC acquired by inter-vehicle communication and the position and speed of the oncoming vehicle OC acquired from the computer 14 by road-to-vehicle communication that only the preceding vehicle FC can make a right turn The stop means 2a does not perform idle stop.

  The control content of the drive source stopping device 1 of the first embodiment described above will be described with reference to a flowchart.

  In step S1 of FIG. 3, the roadside camera 13 performs image processing of the captured image to detect the position, vehicle speed, and left and right blinker signals of one or a plurality of oncoming vehicles OC, and step S2 , The calculation means 14a of the roadside computer 14 calculates the time until the one oncoming vehicle OC moves to a position where the right turn of the vehicle C is not obstructed. When there are a plurality of oncoming vehicles OC, the distance between the oncoming vehicles OC located adjacent to each other in the front-rear direction is equal to or larger than a predetermined distance when the vehicle C can turn right. The time until the oncoming vehicle OC located on the intersection side of the interval moves to a position that does not hinder the right turn of the vehicle C is calculated, and the calculated time is set as the right turn waiting time TW.

  In step S2, the first transmission unit 14b transmits a first data frame including the right turn waiting time TW to the target area, and the first reception unit 6a of the infrastructure communication ECU 6 receives the first data frame and receives the idle stop ECU 2 The stop means 2a of the idle stop ECU 2 receives the first data frame.

  In step S3, the stopping means 2a of the idle stop ECU 2 determines whether or not the right turn waiting time TW included in the first data frame is equal to or longer than the predetermined time TC, and if not, proceeds to END and is affirmative. In this case, the process proceeds to step S4, a stop command is output to the engine ECU 3, and the engine ECU 3 stops the engine based on the stop command and performs an idle stop. The processing from step S1 to S4 is repeatedly executed in a predetermined control cycle.

  According to the drive source stop device 1 of the first embodiment realized by these control contents, the following operational effects can be obtained. That is, according to the drive source stopping device 1 according to the first embodiment, the right turn waiting time TW of the vehicle C is accurately calculated based on the position of the oncoming vehicle OC, the vehicle speed, and the behavior of the oncoming vehicle OC including the winker signal. Can do. Further, it is possible to execute the engine stop after determining whether or not to stop the engine of the vehicle C based on the comparison between the accurately calculated right turn waiting time TW and the predetermined time TC. It is possible to prevent the engine from being stopped when the waiting time TW is a relatively short time, and the completion of the entry and the right turn from being delayed due to the timing of entering the intersection of the vehicle C can be prevented.

  Further, in the drive source stopping device 1 of the first embodiment, the timing for starting the engine again after stopping the engine can be accurately determined based on the right turn waiting time TW, so that the oncoming vehicle OC makes a right turn of the vehicle C. The engine can be started immediately immediately before the timing to move to a position where it does not hinder, and the engine can be reliably started at the timing when the oncoming vehicle OC moves to a position where it does not hinder the right turn of the vehicle C. The vehicle C can be quickly turned right without missing the right turn timing.

  In addition, when a plurality of oncoming vehicles OC are continuously running with a relatively narrow inter-vehicle distance, an interval is provided that allows the vehicle C to turn right between the oncoming vehicles OC adjacent in the front-rear direction. The right turn waiting time TW continues until the last oncoming vehicle OC of the plurality of oncoming vehicles OC moves to a position where the right turn of the vehicle C is not hindered, and the right turn waiting time TW is relatively long. However, in the drive source stopping device 1 of the first embodiment, the right turn waiting time TW is calculated based on the behavior including the position of the oncoming vehicle OC, the vehicle speed, and the left and right winker signals. The engine can be stopped as long as possible during the right turn waiting time TW by accurately calculating the right turn waiting time TW and effectively using the right turn waiting time TW. Thereby, it is possible to sufficiently reduce the exhaust gas emission amount and improve the fuel efficiency of the vehicle C.

  Further, while the vehicle C is traveling straight, for example, there is a target store or the like on the right side in the traveling direction as shown in FIG. 5, and the right blinker lamp is turned on for the purpose of turning the vehicle C to the right. In the case, when the oncoming vehicle OC and the vehicle C have a hardware configuration equivalent to that shown in the vehicle C of the first embodiment, vehicle-to-vehicle communication is performed between the oncoming vehicle OC and the vehicle C. The idle stop ECU 2 of the vehicle C acquires the position and speed of the oncoming vehicle OC detected by the navigation ECU 5 of the oncoming vehicle OC.

  According to this, when there are a plurality of oncoming vehicles OC, there is an inter-vehicle distance between adjacent on-vehicles OC that the vehicle C can turn right, and the on-coming vehicle OC that is located in front of the inter-vehicle distance, that is, a group. The time until the oncoming vehicle OC located at the tail of the oncoming vehicle OC running continuously passes the side of the vehicle C is regarded as a right turn waiting time TW, and the position where the vehicle C turns right is regarded as an intersection. Thus, the same control as the flowchart shown in FIG. 3 can be executed.

  In the first embodiment described above, the camera 13 is installed on the road side as the road-side imaging means as the detection means. However, the detection means can be replaced by the vehicle-side imaging means, and the road-side imaging means and the vehicle-side imaging means. Can also be used together. When only the vehicle-side imaging means is used, the calculation means for calculating the right turn waiting time TW can be provided in the idle stop ECU 2 of the vehicle C, for example.

  Further, in a situation where it is possible to ensure that the oncoming vehicle OC includes the navigation ECU 5, the detection means for detecting the position, vehicle speed, and left / right turn signal of the oncoming vehicle OC is included in the navigation ECU 5 mounted on the oncoming vehicle OC. In this case, the navigation ECU 5 can detect the presence or absence of either a left or right blinker signal from a body ECU (not shown).

  Furthermore, in the above-described first embodiment, in the situation where it is possible to ensure that the oncoming vehicle OC includes the infrastructure communication ECU 6 and to perform road-to-vehicle communication from the oncoming vehicle OC to the computer 14, FIG. As shown, the infrastructure communication ECU 6 can transmit the position, vehicle speed, and blinker signal of the oncoming vehicle OC acquired by the navigation ECU 5 included in the oncoming vehicle OC to the computer 14 by road-to-vehicle communication. That is, in this case, the infrastructure communication ECU 6 mounted on the oncoming vehicle OC constitutes the second transmission means, and the computer 14 constitutes the second reception means.

  In the first embodiment described above, the case where the crossing vehicle that intersects the vehicle C at the intersection is the oncoming vehicle OC is opposed. For example, the intersection is an intersection including a temporary stop line, and is in front of the temporary stop line. The drive source stop device of the present invention can be applied even in a situation where there is an intersecting vehicle RC that enters the intersection from the right side with respect to the vehicle C located at the position. The second embodiment will be described below.

  FIG. 6 is a schematic diagram showing an intersection aspect and roadside equipment to which the drive source stopping device according to the present invention is applied. FIG. 7 is a flowchart showing the control contents of the drive source stop device according to the present invention.

  In the second embodiment, the vehicle C and the crossing vehicle RC are assumed to have the same hardware configuration as the vehicle C described in the first embodiment. Assuming that the camera 13 and the computer 14 are provided, a duplicate description of the individual components is omitted.

  As shown in FIG. 6, for example, the camera 13 is installed immediately above the main lane where there is a large amount of traffic ahead of the temporary stop line at the intersection. And binarization processing, shading processing, luminance difference processing, edge processing, etc. are performed based on the captured image information, the presence or absence of the crossing vehicle RC, the position of the crossing vehicle RC, the vehicle speed, the presence or absence of the pedestrian M Detect position, speed.

  The calculation means 14a of the computer 14 calculates the passing time until the intersection vehicle RC passes the intersection by dividing the distance between the position of the intersection vehicle RC and the intersection including the temporary stop line by the vehicle speed of the intersection vehicle RC. The remaining walking distance is calculated from the current position of the pedestrian M and the width of the main lane, and the pedestrian M completes the crossing by crossing the main lane by dividing the walking distance by the speed of the pedestrian M. The longer walking time of both the passing time and the walking time is calculated as a waiting time TSW after a temporary stop of the vehicle.

  The first transmission unit 14b of the computer 14 transmits a first data frame including the post-pause waiting time TSW calculated by the calculation unit 14a to the target area based on controlling the transmitter.

  The stop means 2a of the idle stop ECU 2 is included in the first data frame received by the first receiving means 6a of the infrastructure communication means ECU 6 after acquiring a left blinker signal transmitted from a body ECU (not shown) on the CAN. When the standby time TSW after the temporary stop is equal to or longer than a predetermined time TC of, for example, 30 seconds, a stop command for stopping the engine (not shown) is output to the engine ECU 3, and the engine ECU 3 stops the engine based on the stop command. .

  The start means 2b of the idle stop ECU 2 is a start instruction for quickly starting the engine at a timing, for example, 0.3 seconds before the timing when the standby time TSW after the temporary stop elapses after the stop means 2a outputs the stop instruction. Is output to the engine ECU 3.

  The control content of the drive source stopping device 1 of the second embodiment described above will be described with reference to a flowchart.

  In step S11 of FIG. 7, the roadside camera 13 performs image processing of the captured image, detects the position and vehicle speed of the crossing vehicle RC, and detects the presence, position, and speed of the pedestrian M. In step S12, the calculation means 14a of the roadside computer 14 calculates the passing time until the intersection vehicle RC does not obstruct the left turn of the vehicle C, that is, until it passes the intersection including the temporary stop line, and the pedestrian The walking time until M completes the crossing over the main lane is calculated, and the long time is defined as the waiting time TSW after the temporary stop.

  In step S12, the first transmission unit 14b transmits the first data frame including the post-pause waiting time TSW to the target area, and the first reception unit 6a of the infrastructure communication ECU 6 receives the first data frame and is idle. The stop means 2a of the idle stop ECU 2 receives the first data frame.

  In step S13, the stopping means 2a of the idle stop ECU 2 determines whether or not the post-temporary waiting time TSW included in the first data frame is equal to or longer than the predetermined time TC. If YES, the process proceeds to step S14 to output a stop command to the engine ECU 3, and the engine ECU 3 stops the engine based on the stop command and performs an idle stop. The processing from step S11 to S14 is repeatedly executed in a predetermined control cycle.

  According to the drive source stop device 1 of the second embodiment realized by these control contents, the following operational effects can be obtained. That is, according to the drive source stop device 1 according to the second embodiment, the waiting time TSW after the temporary stop of the vehicle C is more accurately based on the behavior of the crossing vehicle RC including the position and speed of the crossing vehicle RC and the pedestrian M. Can be calculated. Further, the engine can be stopped after determining whether or not to stop the engine of the vehicle C based on a comparison between the accurately calculated standby time TSW after temporary stop and the predetermined time TC.

  For this reason, the engine is stopped when the waiting time TSW after the temporary stop is relatively short, and it is prevented that the timing of entering the intersection of the vehicle C is missed and the completion of entry and left turn is delayed. be able to.

  Furthermore, in the drive source stopping device 1 of the second embodiment, the timing for starting the engine again after stopping the engine can be accurately determined based on the waiting time TSW after the temporary stop. The engine is immediately started just before the timing of passing the intersection after moving to a position where the left turn of the vehicle is not hindered, and the restart of the engine is completed at the timing when the crossing vehicle RC moves to a position where the left turn of the vehicle C is not hindered. Therefore, the vehicle C can be quickly turned left at the intersection including the temporary stop line without missing the left turn timing.

  Moreover, since the waiting time TSW after temporary stop including the behavior of the pedestrian M can be calculated, after considering the behavior of the pedestrian M, a more appropriate waiting time TSW after temporary stopping is set, The idle time can be stopped by effectively using the waiting time TSW after the temporary stop to reduce the emission amount and improve the fuel efficiency.

  The behavior of the pedestrian M may be detected by the camera 13 as described above. However, when the pedestrian M owns a mobile phone with a GPS function equivalent to the navigation ECU 5 described above, The computer 14 can detect the inter-walk communication between the mobile phone and the computer 14. Alternatively, the idle stop ECU 2 of the vehicle C can also detect the behavior of the pedestrian M by using the inter-vehicle communication between the mobile phone and the infrastructure communication ECU 6.

  Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications and substitutions are made to the above-described embodiments without departing from the scope of the present invention. be able to.

  For example, in addition to installing the camera 13 only at the intersection in both the first embodiment and the second embodiment, the camera 13 is appropriately installed at an interval of, for example, 100 m on the lane that merges with the intersection, and the oncoming vehicle OC to be detected or It is possible to increase the number of crossing vehicles RC.

  The present invention provides a drive source stop device capable of realizing a more appropriate idle stop, and obtains a desired effect on the basis of relatively easy to obtain parameters and minor control changes. Therefore, it is particularly useful when applied to vehicles such as passenger cars, trucks, and buses.

1 Drive source stop device 2 Idle stop ECU
2a Stop means 2b Start means 3 Engine ECU
4 Battery charge state monitoring ECU
5 Navigation ECU
5a Search means 5b Display means 6 Infrastructure communication ECU
6a First receiving means 7 Temperature sensor for detecting outside air temperature in vehicle 8 Brake negative pressure detecting pressure sensor 9 Acceleration sensor 10 Clutch stroke sensor 11 Brake stroke sensor 12 Shift signal sensor 13 Camera 13a Detection means 14 Computer 14a Calculation means 14b First transmission means

Claims (2)

Detection means for detecting the position, vehicle speed, and blinker signal of the oncoming vehicle that enters the intersection where the vehicle enters, and the position of the vehicle relative to the oncoming vehicle based on the detected position, the vehicle speed, and the blinker signal . a calculating means for calculating a right turn waiting time, if the waiting time the calculated is longer than a predetermined time, look including a stop means for stopping the driving source of the vehicle, said calculating means the right turn waiting time, the When the turn signal is not detected, the time until the oncoming vehicle reaches the side of the right turn lane is set to zero when the right turn signal is detected, and when the left turn signal is detected The drive source stop device is characterized in that it is a time until the oncoming vehicle reaches the entrance of the lane to enter after turning to the left . Detecting means for detecting the position, vehicle speed, blinker signal , presence / absence of a pedestrian at the intersection, position and speed of an intersection vehicle entering from the right side of the vehicle to an intersection including a stop line where the vehicle is temporarily stopped; The pedestrian completes crossing the intersection based on the position, the vehicle speed, and the blinker signal based on the transit time when the crossing vehicle passes the intersection, the presence / absence of the pedestrian at the intersection, the position and the speed. When calculating both the walking time and calculating the longer one of the two as the waiting time after the temporary stop of the vehicle, and when the calculated waiting time after the temporary stop is a predetermined time or more, A drive source stop device comprising stop means for stopping a drive source of a vehicle.

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