JP2019124168A - Control device of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control device for a vehicle capable of reducing the loss of a part of the function of the vehicle due to a preparation process for starting an engine. A controller 20 includes a start predicting unit 21 that predicts the start of the engine 10 while the engine 10 is stopped, and a preparation process for starting the engine 10 when the start predicting unit 21 predicts the start of the engine 10. A preparation processing unit 22 for starting the engine and a start request receiving unit 23 for receiving a request for starting the engine 10 by a user. The preparation processing unit 22 prepares for starting the engine 10 when a predetermined period has elapsed from the timing of starting the engine 10 predicted by the starting prediction unit 21 before receiving the request for starting the engine 10 through the starting request receiving unit 23. Cancel processing. [Selection diagram] Figure 1

Description

  The present invention relates to a control device of a vehicle that executes a preparation process of starting an engine.

  2. Description of the Related Art Conventionally, there is known a technique for performing a preparation process for starting an engine when it is predicted that there is a request for starting the engine in order to quickly start the engine at a timing intended by a user.

  For example, in the system described in Patent Document 1, in order to prevent false detection of a rapid voltage drop when the starter motor is started as a failure of the vehicle, the engine is started before starting the starter motor. As an example of the preparation process for starting the vehicle, the mask process for detecting the failure of the vehicle is performed.

JP, 2009-108703, A

  However, in the system described in the above document, the mask processing for vehicle failure detection is continued during a period from when the engine start is predicted to when the engine start is performed, and during this time, the vehicle failure detection can not be performed. There was a problem that

  The present invention has been made in view of such circumstances, and an object thereof is to provide a vehicle capable of reducing a part of the functions of the vehicle from being damaged due to the preparation process of starting the engine. To provide a control device for

  The control device for a vehicle that solves the above problems starts preparation processing for starting the engine when the start of the engine is predicted by the start prediction unit that predicts the start of the engine during the stop of the engine and the start prediction unit. A preparation processing unit, and a start request receiving unit for receiving a request for starting the engine from the user, wherein the preparation processing unit receives the start request of the engine through the start request reception unit, and the start prediction unit When the predetermined time period has elapsed from the predicted engine start timing, the engine start preparation process is canceled.

  According to the above configuration, when a long time has elapsed from the predicted engine start timing, the engine start preparation process is canceled. Therefore, it is possible to reduce the loss of part of the functions of the vehicle due to the preparation process of starting the engine.

  In the vehicle control device, preferably, the preparation process for starting the engine includes a mask process for detecting a failure of the vehicle or an engagement process in which a drive pinion of a starter motor is engaged with a ring gear connected to a crankshaft.

  According to the above configuration, a period during which vehicle failure can not be detected occurs due to the preparation process for starting the engine, and power is consumed to continue the engagement between the drive pinion and the ring gear. Can be reduced.

  In the control device for a vehicle described above, preferably, the start prediction unit predicts the start of the engine based on the information acquired by communication with the outside of the vehicle.

  According to the above configuration, the accuracy of the prediction can be improved as compared to the case where the start of the engine is predicted based only on the information inside the vehicle.

1 is a block diagram showing a schematic configuration of an embodiment of a control device of a vehicle. The flowchart which shows the process procedure of the process regarding starting of the engine which the control apparatus of the vehicle of the embodiment performs. (A) is a timing chart about various signals when a start prediction hits, (b) is a timing chart about various signals when a start prediction deviates.

  Hereinafter, an embodiment of a control device for a vehicle will be described.

  As shown in FIG. 1, an engine 10 as a power source is mounted on a vehicle. The engine 10 is provided with a starter motor 11 and an alternator 12. The starter motor 11 meshes a drive pinion connected to the output shaft of the starter motor 11 with a ring gear connected to the crankshaft 13 of the engine 10 in accordance with energization of the solenoid. The starter motor 11 functions as a motor for restarting the engine 10 in a state in which the drive pinion and the ring gear are in mesh. In addition, the alternator 12 is driven by the crankshaft 13 to generate power when the engine 10 is in operation. Then, the electric power generated by the alternator 12 is stored in the battery 14 which functions as a power source of the starter motor 11. Further, a battery voltage sensor 15 for detecting a voltage between terminals of the battery 14 is connected to the battery 14.

  The vehicle is provided with a controller 20 as a control device of the vehicle that controls the engine 10 based on various signals. The controller 20 has an idling stop function to automatically stop and restart the engine 10. The controller 20 also has a function of detecting a failure of the vehicle by controlling the failure detection system 30. The controller 20 includes a start prediction unit 21, a preparation processing unit 22, and a start request reception unit 23 as a functional configuration for performing the automatic stop and the automatic restart of the engine 10 based on the idling stop function.

  The start prediction unit 21 predicts the start of the engine 10 while the engine 10 is stopped. At this time, the start prediction unit 21 predicts the start of the engine 10 based on the signals input from the surrounding environment sensor 40 and the communication device 41.

  More specifically, the surrounding environment sensor 40 is, for example, an on-vehicle camera, a millimeter wave radar, a laser radar, or the like, and detects the start of a preceding vehicle as the surrounding environment of the vehicle. The communication device 41 is a device that communicates with the outside of the vehicle, and detects, for example, the start of a preceding vehicle by performing inter-vehicle communication with the preceding vehicle. Then, when the start prediction unit 21 detects the start of the front vehicle through the surrounding environment sensor 40 or the communication device 41, the start prediction unit 21 starts to count down the remaining time until the start of the vehicle from that time. Then, the timing at which the remaining time until the start of the vehicle becomes "zero" is predicted as the timing for starting the engine 10.

  The preparation processing unit 22 prepares for the start-up of the engine 10 on condition that the start-up prediction unit 21 predicts the start of the engine 10, that is, on the condition that the countdown of the remaining time until the start of the vehicle is started. Start. The preparation process for starting the engine 10 includes mask processing to invalidate the failure detection function of the vehicle through the failure detection system 30, and meshing processing to mesh the drive pinion of the starter motor 11 with the ring gear connected to the crankshaft 13. Including.

  The start request receiving unit 23 detects the presence or absence of a request for starting the engine 10 based on the depression amount of the brake pedal detected through the brake sensor 42. At this time, when the depression of the brake pedal is released, the start request receiving unit 23 detects a request for starting the engine 10 and receives the request.

  Next, with reference to FIG. 2, a specific processing procedure of the processing related to the start of the engine 10 executed by the controller 20 according to the present embodiment will be described. The series of processing shown in FIG. 2 is executed each time the engine 10 is automatically stopped by the idling stop function.

  As shown in FIG. 2, when the controller 20 starts this process, it first determines whether the predicted time until the start of the engine 10 is less than a predetermined threshold value α (step S11). The predicted time until the start of the engine 10 is equal to the remaining time until the start of the vehicle, which is counted down by the start prediction unit 21.

  Then, when the controller 20 determines that the predicted time until the start of the engine 10 is equal to or more than the predetermined threshold value α (step S11 = NO), the controller 20 waits without advancing the process. On the other hand, when the controller 20 determines that the predicted time until the start of the engine 10 is less than the predetermined threshold value α (step S11 = YES), the controller 20 starts the preparation process of the start of the engine 10 through the preparation processing unit 22 (step S12).

  Subsequently, the controller 20 determines whether a request for starting the engine 10 has been received through the start request receiving unit 23 (step S13). When the controller 20 determines that the request for starting of the engine 10 has been received through the start request receiving unit 23 (step S13 = YES), the starter motor 11 is driven to start the engine 10 (step S14). The process related to the start of the engine 10 shown in FIG.

  On the other hand, when it is determined that the request for starting the engine 10 has not been received through the start request receiving unit 23 (step S13 = NO), the controller 20 determines that the elapsed time from the predicted timing of starting the engine 10 is a predetermined threshold. It is determined whether or not β has been exceeded (step S15). Specifically, it is determined whether the elapsed time from the timing when the remaining time until the transmission of the vehicle counted down by the start prediction unit 21 has become "zero" has exceeded a predetermined threshold value β. Then, the controller 20 requests start of the engine 10 through the start request accepting unit 23 until the elapsed time from the predicted start timing of the engine 10 exceeds the predetermined threshold value β (step S15 = NO). Repeat the judgment of. On the other hand, when the controller 20 determines that the elapsed time from the predicted start-up timing of the engine 10 exceeds the predetermined threshold value β (step S15 = YES), the preparation processing of the engine 10 by the preparation processing unit 22 is performed. It cancels (step S16).

  Thereafter, the controller 20 stands by until a request for starting the engine 10 is received through the start request receiving unit 23 (step S17). When the controller 20 receives a request for starting the engine 10 through the start request receiving unit 23 (step S17 = YES), the controller 20 executes a preparation process for starting the engine 10 through the preparation processing unit 22 (step S18), After the starter motor 11 is driven to start the engine 10 (step S19), the process for starting the engine 10 shown in FIG. 2 is ended.

  Next, the operation of the controller 20 according to the present embodiment will be described.

  As shown in FIG. 3 (a), when the engine rotational speed is "zero" and the vehicle is at a stop, the time when the start information of the preceding vehicle is switched from off to on and the start of the preceding vehicle is detected At t1, a countdown of the remaining time until the start of the vehicle is started. Then, the timing at which the remaining time until the start of the host vehicle becomes "zero" is predicted as the timing for starting the engine 10.

  Then, at time t2 when the predicted value of the remaining time until the vehicle starts moving falls below the predetermined threshold value α, the preparation process for starting the engine 10 is started. In preparation for starting of the engine 10, the solenoid of the starter motor 11 is energized, and the drive pinion of the starter motor 11 is engaged with the ring gear connected to the crankshaft 13. Further, in the preparation process for starting the engine 10, the mask processing information for limiting the transmission of the control command from the controller 20 to the failure detection system 30 is switched from off to on.

  In this way, since the preparation process for starting is performed in advance based on the prediction, the predicted value of the remaining time until the start of the vehicle reaches "zero", the depression of the brake pedal is released, and the brake signal changes from on to off At the switching time t3, the starter motor 11 can be switched from the stop state to the drive state to quickly start the engine 10.

  On the other hand, as shown in FIG. 3 (b), the brake signal is turned on at time t4 at which the elapsed time from time t3 when the predicted value of the remaining time until start of the vehicle reaches "zero" reaches a predetermined threshold value β. When the engine 10 is maintained as it is, the preparation process for starting the engine 10 is canceled. That is, the energization of the solenoid of the starter motor 11 is stopped, and the meshing between the drive pinion of the starter motor 11 and the ring gear of the crankshaft 13 is released. In addition, the mask processing information for limiting the transmission of the control command from the controller 20 to the failure detection system 30 is switched from on to off. As a result, it is possible to reduce the increase in the power consumption of the starter motor 11 and the limitation of the failure detection function of the vehicle due to the preparation process for starting the engine 10.

  As described above, according to the above-described embodiment, the following effects can be obtained.

  (1) When a long time has elapsed from the predicted timing of starting the engine 10, the preparation process for starting the engine 10 is canceled. Therefore, it is possible to reduce that a part of the function of the vehicle is lost due to the preparation process for starting the engine 10.

  (2) A period during which a failure of the vehicle can not be detected occurs due to the preparation process for starting the engine 10, and the meshing between the drive pinion of the starter motor 11 and the ring gear of the crankshaft 13 is continued. Power consumption can be reduced.

  (3) Since the start of the engine 10 is predicted based on the information acquired by communication with the outside of the vehicle, the accuracy of the prediction is compared with the case where the start of the engine 10 is predicted based only on the information inside the vehicle. Can be improved.

  The above embodiment may be modified as follows.

  In the above embodiment, the start of the engine 10 is predicted based on the information acquired through the communication with the outside of the vehicle through the communication device 41. Instead of this, for example, the start of the engine 10 may be predicted based on only the information inside the vehicle, such as the detection result of the surrounding environment sensor 40.

  In the above embodiment, when the start of the forward vehicle is detected, the predicted value of the remaining time until the start of the host vehicle is counted. Instead of this, when the start of the forward vehicle is detected, the prediction timing of the start of the engine 10 may be set to monitor whether or not the prediction timing has been reached. Then, when the depression of the brake pedal is not released before the predetermined time has elapsed after reaching the prediction timing, the preparation process for starting the engine 10 may be canceled.

  DESCRIPTION OF SYMBOLS 10 ... Engine 11, 11 ... Starter motor, 12 ... Alternator, 13 ... Crankshaft, 14 ... Battery, 15 ... Battery voltage sensor, 20 ... Controller, 21 ... Start prediction part, 22 ... Preparation processing part, 23 ... Start request reception part , 30: failure detection system, 40: peripheral environment sensor, 41: communication device, 42: brake sensor.

Claims (3)

A start prediction unit that predicts the start of the engine while the engine is stopped;
A preparation processing unit that starts preparation processing for starting the engine when the start of the engine is predicted by the start prediction unit;
And a start request receiving unit for receiving a request for starting the engine from the user;
The preparation processing unit prepares for engine start preparation processing when a predetermined period has elapsed from the engine start timing predicted by the start prediction unit before accepting the engine start request via the start request reception unit. Vehicle control device to release. The control device for a vehicle according to claim 1, wherein the preparation process for starting the engine includes a mask process for detecting a failure of the vehicle or an engagement process in which a drive pinion of a starter motor is engaged with a ring gear connected to a crankshaft. The control device for a vehicle according to claim 1 or 2, wherein the start prediction unit predicts the start of the engine based on the information acquired by communication with the outside of the vehicle.

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