JP2018075884A - Apparatus and method for controlling vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cause a driver to pay attention to the following vehicle when a driver unintentionally makes a vehicle braked or a torque of a driving wheel is down.SOLUTION: An apparatus 100 for controlling a vehicle has a control section actuating a brake lamp 61 for issuing a warning to the back of the vehicle, when the vehicle is braked when there is no deceleration intention of a driver during travel of the vehicle or a torque transmitted to a driving wheel 5 of the vehicle is down.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle control device and a vehicle control method.

  In Patent Document 1, for example, when a driver suddenly decelerates according to the driver's intention to decelerate, such as when the driver performs a downshift operation, even if the brake pedal is not depressed, A vehicle control device for lighting a warning light is disclosed.

JP 2005-349865 A

  In the control device disclosed in Patent Document 1, for example, when the vehicle is braked unintentionally during driving at high speed, or when the driving wheel torque is reduced, the warning lamp does not light up. . For this reason, there is a possibility that the inter-vehicle distance is rapidly closed before the driver of the succeeding vehicle notices.

  The present invention has been made in view of such technical problems, and pay attention to the following vehicle when the vehicle is braked unintentionally or when the driving wheel torque is reduced. The purpose is to be able to encourage.

  A vehicle control device according to an aspect of the present invention is a state in which the vehicle is braked or the torque transmitted to the drive wheels of the vehicle is reduced when the vehicle is traveling and the driver does not intend to decelerate. Then, it has a control part which operates the warning lamp which emits a warning behind the vehicles.

  According to another aspect of the vehicle control method of the present invention, when the vehicle is running and the driver does not intend to decelerate, the vehicle is braked or the torque transmitted to the drive wheels of the vehicle is reduced. A warning light that emits a warning to the rear of the vehicle is activated when the vehicle enters a state.

  According to these aspects, it is possible to call attention to the following vehicle when the vehicle is braked unintentionally or when the driving wheel torque is reduced.

1 is a schematic configuration diagram of a vehicle to which a control device according to an embodiment of the present invention is applied. It is the flowchart which showed the content of the control which a control apparatus performs. It is the flowchart which showed the content of the control of the modification which a control apparatus performs.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a schematic configuration diagram of a vehicle according to an embodiment of the present invention. The vehicle includes an engine 1 as a power source. The power of the engine 1 is transmitted to the drive wheels 5 via the automatic transmission TM and the differential device 4.

  The automatic transmission TM includes a torque converter 2 and a transmission mechanism 3. The automatic transmission TM has a drive (D) range, a reverse (R) range, a neutral (N) range, a parking (P) range, etc. as ranges, and any one of them can be set as a set range. it can. The D range and the R range constitute a travel range, and the N range and the P range constitute a non-travel range.

  The setting range of the automatic transmission TM is set by the driver operating the shifter 6. The shifter 6 is, for example, a momentary shift lever that automatically returns to the neutral position after the operation. The shifter 6 is a button shift switch, a general shifter whose setting range is changed according to the position of the shift lever, and the like. It may be. The shifter position sensor 14 detects which range is selected by the shifter 6.

  The transmission mechanism 3 is a stepped automatic transmission mechanism, and includes a planetary gear mechanism, a control valve unit 31, a park module 32, and a plurality of fastening elements (clutches) 33.

  The speed change mechanism 3 can switch between the shift speed (gear ratio) and forward / reverse by changing the fastening state of the plurality of fastening elements 33.

  The control valve unit 31 includes a plurality of solenoids 34 for controlling the hydraulic pressure. The control valve unit 31 adjusts the hydraulic pressure supplied from an oil pump (not shown) to generate a line pressure. Further, the hydraulic pressure of the plurality of fastening elements 33 using the line pressure as a source pressure is controlled.

  The park module 32 mechanically locks the output shaft of the automatic transmission TM during parking.

  A hydraulic brake device 7 is provided on the driving wheel 5 and a driven wheel (not shown). The braking force that acts on the vehicle from the brake device 7 is adjusted according to the amount of depression of a brake pedal (not shown) by the driver.

  The control device 100 that controls driving of the vehicle includes an ATCU 10 that controls the automatic transmission TM, an ECU 30 that controls the engine 1, and a BCU 60 that controls the brake device 7.

  ATCU10 is an automatic transmission control unit. The ATCU 10 includes an accelerator opening sensor 11 that detects an accelerator opening APO that is an operation amount of an accelerator pedal (not shown), a vehicle speed sensor 12 that detects a vehicle speed VSP, a brake switch 13 that detects whether or not the brake pedal is depressed, and a shifter position. A signal from the sensor 14 or the like is input.

  The ATCU 10 is connected to the ECU 30 and the BCU 60 via the CAN 70 so as to be able to communicate with each other.

  The ATCU 10 sets the setting range of the automatic transmission TM based on the signal from the shifter position sensor 14. The ATCU 10 outputs a control command value to the control valve unit 31 as described below according to the set range of the automatic transmission TM.

  When the range of the automatic transmission TM is set to the D range, the ATCU 10 determines a target shift stage with reference to the shift map based on the vehicle speed VSP and the accelerator opening APO, and a control command for achieving the target shift stage. The value is output to the control valve unit 31. Thereby, the plurality of solenoids 34 are controlled in accordance with the control command value, the hydraulic pressure of the plurality of fastening elements 33 is adjusted, and the target shift stage is achieved.

  When the setting range of the automatic transmission TM is set to the R range, the ATCU 10 determines the target shift speed as the reverse speed, and outputs a control command value for achieving the target shift speed to the control valve unit 31. In this case, the plurality of solenoids 34 are controlled so as to achieve the reverse gear.

  When the setting range of the automatic transmission TM is set to the P range or the N range, the ATCU 10 outputs a control command value for releasing the plurality of fastening elements 33 to the control valve unit 31. When the set range is the P range, the ATCU 10 further operates the actuator of the park module 32 to place the automatic transmission TM in the park lock state.

  The ECU 30 is an engine control unit and controls the engine 1. The ECU 30 outputs the rotational speed NE of the engine 1, the throttle opening TVO, and the like to the ATCU 10.

  The BCU 60 is a brake control module, and controls the braking force by the brake device 7 and the operation of the brake lamp 61. In the present embodiment, the BCU 60 functions as a control unit that controls the operation of the brake lamp 61. Moreover, the brake lamp 61 functions as a warning light that issues a warning to the rear of the vehicle by operating so as to be lit or blinking.

  By the way, it is conceivable that a state in which the vehicle decelerates occurs when the vehicle is traveling and the driver does not intend to decelerate. For example, in the automatic transmission TM, the fastening element 33 may be erroneously fastened due to some abnormality, and there may be an interlock state in which the combination fastening elements 33 that are not originally fastened are simultaneously fastened. When such an interlock state occurs, rotation of the output shaft is impeded and the vehicle decelerates rapidly. In particular, if the vehicle suddenly decelerates due to such an abnormality during high-speed travel, there is a possibility that the distance between the following vehicle and the following vehicle will be rapidly reduced.

  For this reason, the control device 100 of the present embodiment reduces the state in which the vehicle is braked or the torque transmitted to the drive wheels 5 of the vehicle when the vehicle is traveling and the driver does not intend to decelerate. When the state is reached, the BCU 60 activates the brake lamp 61 and issues a warning to the driver of the following vehicle. This will be described in detail below with reference to FIG.

  When the vehicle is traveling and the driver does not intend to decelerate, the control device 100 determines whether the vehicle is braked or whether the torque transmitted to the drive wheels 5 of the vehicle is reduced. In other words, it is detected whether an abnormality accompanying deceleration has occurred or an erroneous operation involving deceleration has been performed (step S11). Here, when the driver does not intend to decelerate, the driver is not depressing the brake pedal, the shifter 6 is not operated, or the brake pedal is not depressed, and the vehicle is traveling forward. This is when the shifter 6 is mistakenly operated to the R range or the like.

  The state in which the vehicle is braked when the driver does not intend to decelerate is, for example, the case where the above-described interlock state occurs in the automatic transmission TM (interlock abnormality detection).

  Furthermore, the state in which the torque transmitted to the drive wheels 5 of the vehicle is reduced when the driver does not intend to decelerate is, for example, automatic transition to the neutral state of the automatic transmission TM, or abnormal stop of the drive source (engine 1). (Stops due to abnormalities in the drive source, stops due to lack of gas, etc.), output torque limitation of the drive source (engine 1) by protection control (high oil temperature control, etc.) of the automatic transmission TM, operation of engine overrev protection control .

  The state in which the automatic transmission TM automatically shifts to the neutral state refers to, for example, detection of an abnormality (neutral abnormality) that shifts to the neutral state when the fastening element 33 is erroneously released, Automatic transition to the neutral state to avoid the interlock state of the automatic transmission TM, automatic transition to the neutral state (reverse inhibit control) due to an erroneous operation of the driver (for example, operation to the R range during high-speed forward travel), etc. is there. The reverse inhibit control is control for preventing reverse rotation torque from being transmitted from the drive wheel 5 to the drive source (engine 1) when an erroneous operation is performed from the D range to the R range. For example, when the shift operation from the D range to the R range is performed at a predetermined vehicle speed or higher, the automatic transmission TM is automatically shifted to the neutral state.

  The above-described high oil temperature control is a control that prompts cooling of the hydraulic oil when the temperature (oil temperature) of the hydraulic oil in the automatic transmission TM becomes equal to or higher than a predetermined value. For example, when the temperature of the hydraulic oil (oil temperature) in the automatic transmission TM becomes equal to or higher than a predetermined value, control for giving a torque down instruction to a drive source (engine, motor, etc.).

  The engine overrev protection control described above is control for protecting the engine 1 when the engine speed becomes a predetermined value or more. For example, this is control for instructing the engine 1 to reduce the torque when the engine speed becomes a predetermined value or more.

  When the vehicle is running and the driver does not intend to decelerate the vehicle, the BCU 60 generates a brake lamp when the vehicle is braked or the torque transmitted to the drive wheels 5 of the vehicle is reduced. 61 is operated to light up or blink (step S12).

  Thus, by operating the brake lamp 61 so as to blink or turn on, a warning can be issued to the driver of the following vehicle, and the possibility that the distance between the following vehicle and the vehicle is rapidly clogged can be reduced. .

  In the present embodiment, the brake lamp 61 is operated immediately after the interlock state occurs due to the erroneous fastening of the fastening element 33 described above. However, after the interlock state occurs, the automatic transmission TM is brought into the neutral state. In the case of a configuration for automatic transition, as shown in FIG. 3, the brake lamp 61 is continuously operated even after the brake lamp 61 is operated immediately after the interlock state is generated (step S13).

  As a result, the brake lamp 61 continues to operate not only immediately after the erroneous engagement occurs, but also after the automatic transition to the neutral state, so that the warning to the driver of the following vehicle is continued. Therefore, it is possible to reliably reduce the possibility that the distance between the following vehicle and the following vehicle is rapidly clogged.

  As described above, the BCU 60 of the control device 100 according to the present embodiment is transmitted to the vehicle braking state or the driving wheel 5 of the vehicle when the vehicle is traveling and the driver does not intend to decelerate. When a state occurs in which the torque is reduced, the brake lamp 61 is operated so as to blink or light up.

  As a result, even when the vehicle is running and the driver does not intend to decelerate, the brake lamp 61 can be used even when the vehicle is braked or the torque transmitted to the drive wheels 5 of the vehicle is reduced. By issuing a warning by operating, the driver of the following vehicle can be alerted. Therefore, it is possible to reduce the possibility that the distance between the following vehicle and the following vehicle is rapidly clogged (effect corresponding to claims 1 and 6).

  For example, when an erroneous engagement of the fastening element 33 of the automatic transmission occurs, a warning is issued to the driver of the succeeding vehicle by alerting the driver of the succeeding vehicle that the braking force is working. it can. Therefore, it is possible to reduce the possibility that the distance between the following vehicle and the following vehicle is rapidly clogged (effect corresponding to claim 2).

  In addition, for example, when the automatic transmission automatically shifts to the neutral state, the braking force does not work, but a relative speed difference from the following vehicle occurs, so the driver of the following vehicle By issuing a warning, the driver of the following vehicle can be alerted. Therefore, it is possible to reduce the possibility that the distance between the following vehicle and the following vehicle is rapidly clogged (effect corresponding to claim 3).

  The brake lamp 61 is operated immediately after the interlock state is generated due to the erroneous engagement of the fastening element 33. However, in the case where the automatic transition is made from the interlock state to the neutral state, the brake lamp 61 is continuously operated. Let In this case, since the brake lamp 61 is operated not only immediately after erroneous engagement but also in the neutral state, it is possible to continuously urge the driver of the succeeding vehicle to be careful. Therefore, it is possible to reliably reduce the possibility that the distance between the following vehicle and the following vehicle will be rapidly reduced (effect corresponding to claim 4).

  In addition, for example, when the torque of the drive source (engine 1) is reduced, the braking force does not work, but a relative speed difference with the following vehicle occurs. By issuing a warning to the driver, the driver of the following vehicle can be alerted. Therefore, it is possible to reduce the possibility that the distance between the following vehicle and the following vehicle is rapidly clogged (effect corresponding to claim 5).

  The embodiment of the present invention has been described above, but the above embodiment is merely a part of an application example of the present invention, and the technical scope of the present invention is limited to the specific configuration of the above embodiment. is not.

  In the embodiment described above, the stepped transmission has been described as an example, but a continuously variable transmission may be used. In this case, belt slip prevention control and the like as protection control for the automatic transmission are included in a state where the torque transmitted to the drive wheels 5 is reduced.

  The belt slip prevention control is control for avoiding a belt slip state when the belt slips, or control for avoiding in advance that the belt slips when the belt is likely to slip. For example, this is control for instructing a torque source to a drive source (engine, motor, etc.) when belt slip is detected or when belt slip is likely to occur. For example, belt slip detection or detection when belt slip is likely to occur may include the possibility that the belt is slipping by comparing the commanded transmission gear ratio with the ratio between the actual primary pulley rotation speed and the secondary pulley rotation speed. And a method of determining whether there is a possibility that the belt slips due to insufficient secondary pulley pressure by comparing the output torque of the drive source and the secondary pulley pressure.

  In the above-described embodiment, the vehicle using the engine 1 as a drive source has been described as an example, but the present invention may be applied to an electric vehicle or a hybrid vehicle using a drive source and a motor. In this case, problems such as a decrease in the power supply voltage of the motor are also included in the state where the torque of the drive source is reduced.

  Furthermore, in the above-described embodiment, the brake lamp 61 is described as an example of the warning lamp, but the warning lamp may be a hazard lamp. Alternatively, a warning lamp or a display device may be used. Such warning lamps and display devices dedicated to warning lights are not limited to the rear portion of the vehicle, and may be installed in any location as long as the driver of the following vehicle can recognize the side portion of the vehicle, the roof of the vehicle, and the like.

  In addition, although the operation of the brake lamp 61 is controlled by the BCU 60, it may be controlled by another device.

  Application examples of the control device 100 of the present embodiment configured as described above are listed below.

  For example, the control device 100 includes a control unit (BCU 60) that activates a warning light (brake lamp 61) that issues a warning behind the vehicle when the fastening element 33 of the automatic transmission TM is erroneously engaged during traveling of the vehicle. It is characterized by that.

  If the fastening element 33 of the automatic transmission TM is erroneously engaged while the vehicle is running, there is a possibility that the vehicle speed may decrease due to the interlock, automatic transition to the neutral state, or downshift of the automatic transmission TM. It is preferable that the warning light (brake lamp 61) is operated when the warning is detected. In the case of incorrect engagement, the automatic transmission TM may upshift (the vehicle speed increases). Therefore, when executing the control, the warning lamp (brake lamp 61) is activated in the event of incorrect engagement and upshift. Control for prohibiting the above may be additionally applied.

  Further, for example, the control device 100 includes a control unit (BCU 60) that operates a warning light (brake lamp 61) that issues a warning to the rear of the vehicle when the automatic transmission TM is interlocked while the vehicle is running. And

  In this case, it is preferable to operate the warning lamp (brake lamp 61) because there is a possibility that the vehicle speed may decrease.

  In addition, for example, the control device 100 includes a control unit (BCU 60) that activates a warning light (brake lamp 61) that issues a warning to the rear of the vehicle when the automatic transmission TM automatically shifts to the neutral state while the vehicle is traveling. It is characterized by that.

  In this case, it is preferable to operate the warning lamp (brake lamp 61) because there is a possibility that the vehicle speed may decrease. Examples of the automatic transition to the neutral state include automatic control to the neutral state for avoiding the interlock and reverse inhibit control.

  Further, for example, the control device 100 includes a control unit (BCU 60) that operates a warning light (brake lamp 61) that issues a warning to the rear of the vehicle when reverse inhibit control is performed while the vehicle is running. To do.

  In this case, it is preferable to operate the warning lamp (brake lamp 61) because there is a possibility that the vehicle speed may decrease.

  Further, for example, the control device 100 includes a control unit (BCU 60) that operates a warning light (brake lamp 61) that issues a warning to the rear of the vehicle when the drive source (engine 1, motor) stops abnormally while the vehicle is traveling. It is characterized by having.

  In this case, it is preferable to operate the warning lamp (brake lamp 61) because there is a possibility that the vehicle speed may decrease.

  Further, for example, the control device 100 activates a warning light (brake lamp 61) that issues a warning to the rear of the vehicle when a torque reduction instruction is given to the drive source (engine 1, motor) while the vehicle is traveling. (BCU60).

  In this case, it is preferable to operate the warning lamp (brake lamp 61) because there is a possibility that the vehicle speed may decrease. Examples of cases where a torque down instruction is given include high oil temperature control, belt slip prevention control, and engine over-rev control.

  Further, for example, the control device 100 activates a warning light (brake lamp 61) that issues a warning to the rear of the vehicle when performing high oil temperature control of the automatic transmission TM while the vehicle is running. It is characterized by having.

  In this case, it is preferable to operate the warning lamp (brake lamp 61) because there is a possibility that the vehicle speed may decrease.

  In addition, for example, the control device 100 provides a warning light (brake lamp 61) that issues a warning to the rear of the vehicle when performing belt slip prevention control of the automatic transmission (belt type continuously variable transmission) while the vehicle is traveling. It has the control part (BCU60) to act | operate, It is characterized by the above-mentioned.

  In this case, it is preferable to operate the warning lamp (brake lamp 61) because there is a possibility that the vehicle speed may decrease.

  Further, for example, the control device 100 includes a control unit (BCU 60) that operates a warning light (brake lamp 61) that issues a warning to the rear of the vehicle when engine overlev protection control is performed while the vehicle is running. And

  In this case, it is preferable to operate the warning lamp (brake lamp 61) because there is a possibility that the vehicle speed may decrease.

100 Control device 1 Engine (drive source)
5 Drive Wheel 33 Fastening Element 34 Solenoid 60 BCU (Control Unit)
61 Brake lamp (warning light)
TM automatic transmission

Claims (6)

A control device for a vehicle,
When the vehicle is running and the driver does not intend to decelerate, if the vehicle is braked or the torque transmitted to the drive wheels of the vehicle is reduced, a warning is given to the rear of the vehicle. A control device for a vehicle, comprising a control unit that activates a warning light that emits light. The vehicle control device according to claim 1,
The vehicle control device according to claim 1, wherein the vehicle is braked in a state where a fastening element of the automatic transmission is erroneously fastened. The vehicle control device according to claim 1,
The vehicle control apparatus according to claim 1, wherein the state in which the torque transmitted to the drive wheels is reduced is a state in which the automatic transmission is automatically shifted to the neutral state. The vehicle control device according to claim 1,
The state in which the vehicle is braked is a state in which the fastening element of the automatic transmission is erroneously fastened,
The control unit causes the automatic transmission to automatically shift to a neutral state after the erroneous engagement has occurred, and continues operation of the warning light even after the neutral state has been reached. . The vehicle control device according to claim 1,
The vehicle control apparatus according to claim 1, wherein the state in which the torque transmitted to the drive wheel is reduced is a state in which the torque of the drive source is reduced. A vehicle control method comprising:
When the vehicle is running and the driver does not intend to decelerate, if the vehicle is braked or the torque transmitted to the drive wheels of the vehicle is reduced, a warning is given to the rear of the vehicle. A control method for a vehicle characterized by operating a warning light that emits light.

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