KR20150098722A - Adaptive cruise control system of vehicle with manual transmission and method thereof - Google Patents

Abstract

The present invention relates to an adaptive cruise control system and an adaptive cruise control method for a vehicle with a manual transmission capable of preventing a stall while operating an adaptive cruise control mode of the vehicle with the manual transmission by temporarily halting the adaptive cruise control mode if an engine RPM is lower than the minimum reference RPM while operating the adaptive cruise control mode performing an automatic acceleration and deceleration control to maintain a proper distance to a vehicle driving in the front. An embodiment of the present invention provides an adaptive cruise control system for a vehicle with a manual transmission include: a sensor unit sensing information about a vehicle driving in the front, an engine RPM, a position of the transmission, and a position of a clutch; and an electronic control unit temporarily halting an adaptive cruise control mode if the engine RPM sensed by the sensor unit is lower than the minimum reference RPM, when an input of a clutch is not sensed within a predetermined reference time after transmitting shifting request signals while operating the adaptive cruise control mode, in order to control acceleration and deceleration of the vehicle to maintain a proper distance to the vehicle driving in the front.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adaptive cruise control system for a vehicle equipped with a manual transmission,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adaptive cruise control system and method for a vehicle equipped with a manual transmission and, more particularly, to an adaptive cruise control The present invention relates to an adaptive cruise control system and method for a vehicle equipped with a manual transmission capable of preventing starting-off during execution of an adaptive cruise control mode by temporarily canceling an adaptive cruise control mode when engine RPM is smaller than a minimum reference RPM will be.

The vehicle is equipped with an adaptive cruise control system for the convenience of the driver.

The adaptive cruise control system has been filed in many cases, such as Korean Patent Publication No. 2006-53652 and Korean Patent Publication No. 2008-32003.

The adaptive cruise control system including the above patent can be applied to an engine cruise control system without an accelerator pedal operation of a driver by setting an arbitrary traveling speed desired by a driver, for example, 100 kph, The unit automatically adjusts the air volume and the fuel amount to run at constant speed at the speed set by the driver.

A vehicle equipped with or equipped with an automatic transmission takes an upshift or a downshift to control the constant-speed running at the speed change stage.

The vehicle equipped with the manual transmission transmits the shift request signal for controlling the constant speed running because the running control is performed at the currently selected gear range unless the driver shifts the gear, and informs the driver of the target gear step number, To implement an adaptive cruise control system.

However, the adaptive cruise control system of a vehicle equipped with a conventional manual transmission disengages the adaptive cruise control mode in which the automatic acceleration and deceleration control is performed so as to maintain an appropriate distance from the preceding vehicle in the first stage in order to prevent the start- It is inconvenient to perform the acceleration / deceleration control according to the driver's will in the driving environment in which the adaptive cruise control mode is to be performed.

Therefore, there is a need for an adaptive cruise control system of a vehicle having a manual transmission capable of temporarily releasing the adaptive cruise control mode only under the condition for preventing the start-off.

(Document 1) Korean Patent Laid-Open Publication No. 2006-53652 (May 22, 2006) "Shift control device and method at constant speed traveling of an automatic transmission vehicle (Document 2) Korean Patent Publication No. 2008-32003 (Apr. 4, 2008) "Vehicle Travel Control Device"

SUMMARY OF THE INVENTION An object of the present invention is to temporarily stop the adaptive cruise control mode when the engine RPM is smaller than the minimum reference RPM during an adaptive cruise control mode operation in which an automatic acceleration and deceleration control is performed to maintain an appropriate distance from the preceding vehicle in a vehicle equipped with a manual transmission And to provide an adaptive cruise control system and method for a vehicle equipped with a manual transmission capable of preventing starting-off during execution of an adaptive cruise control mode.

According to an aspect of the present invention, there is provided an adaptive cruise control system for a vehicle having a manual transmission, the system including an information processor for acquiring information on a preceding vehicle, a speed of the vehicle, RPM of the engine, A sensor unit for sensing the sensor; And an acceleration cruise control mode for controlling acceleration and deceleration of the subject vehicle so as to maintain an appropriate distance from the preceding vehicle based on information sensed by the sensor unit, And an electronic control unit for temporarily canceling the operation of the adaptive cruise control mode when the RPM of the engine detected through the sensor unit is smaller than a predetermined minimum reference RPM when the input is not detected do.

The electronic control unit preferably outputs an alarm control signal for alarming the start-up OFF if the RPM of the engine is less than the minimum reference RPM.

Wherein the electronic control unit temporarily cancels the operation of the adaptive cruise control mode when an instruction to maintain an appropriate distance from the preceding vehicle is an acceleration command when the input of the clutch is sensed and the operation of the adaptive cruise control mode It is preferable to control the operation mode so that the operation mode is maintained.

According to another embodiment of the present invention, there is provided a method for controlling adaptive cruise control of a vehicle using an adaptive cruise control system of a vehicle having a manual transmission, the method comprising: sensing information of a preceding vehicle sensed through a sensor unit provided in the vehicle, , An RPM of the engine, a position of the transmission and a position of the clutch; Wherein the control unit controls the acceleration / deceleration of the subject vehicle based on the received information to maintain an appropriate distance from the preceding vehicle, and transmits the shift request signal during the adaptive cruise control mode to determine whether the clutch input is detected within a predetermined reference time ; And temporarily releasing the operation of the adaptive cruise control mode if the RPM of the received engine is less than a preset minimum reference RPM if the input of the clutch is not detected as a result of the determining step An adaptive cruise control method is provided.

Preferably, the step of releasing includes outputting an alarm control signal for alarming the start-up OFF if the RPM of the engine is less than the minimum reference RPM.

Further, in the adaptive cruise control method according to another embodiment of the present invention, if the input of the clutch is detected as a result of the determining, after the determining, the command for maintaining the proper distance from the preceding vehicle is an acceleration command The control unit may temporarily cancel the operation of the adaptive cruise control mode, and if the command is a deceleration command, controlling the operation mode to maintain the operation of the adaptive cruise control mode.

According to the embodiment of the present invention, when the engine RPM is smaller than the minimum reference RPM during the adaptive cruise control mode operation that carries out the automatic acceleration and deceleration control to maintain the proper distance from the preceding vehicle in the vehicle equipped with the manual transmission, It is possible to prevent the start-off from being turned off while performing the adaptive cruise control mode.

Also, according to the embodiment of the present invention, if the engine RPM is smaller than the minimum reference RPM, the driver can preliminarily take measures to prevent the starting from being turned off by alerting the starting off.

According to the embodiment of the present invention, when the input of the clutch is detected and the automatic acceleration command is applied, the operation of the adaptive cruise control mode is temporarily released to stably perform the adaptive cruise control function of the vehicle.

1 is a block diagram for explaining an adaptive cruise control system of a vehicle having a manual transmission according to an embodiment of the present invention;
2 is a block diagram for explaining the electronic control unit shown in Fig. 1, and Fig.
3 is a flowchart illustrating an adaptive cruise control method of an adaptive cruise control system of a vehicle having a manual transmission according to an embodiment of the present invention.

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

1 is a block diagram for explaining an adaptive cruise control system of a vehicle equipped with a manual transmission according to an embodiment of the present invention, and FIG. 2 is a block diagram for explaining the electronic control unit shown in FIG. 1 Respectively.

Referring to FIG. 1, an adaptive cruise control system for a vehicle having a manual transmission according to an embodiment of the present invention includes a sensor unit 11, a sensor unit 11, An electronic control unit 12 for controlling the acceleration / deceleration control mode (hereinafter, referred to as 'ACC mode') for controlling the acceleration / deceleration of the vehicle so as to maintain the distance, An engine control device 13 and a brake control device 14. [

The sensor unit 11 includes a radar sensor, a vehicle speed sensor for sensing the speed of the vehicle, and the like.

The radar sensor measures the information of the preceding vehicle and the information of the present vehicle. Generates an acceleration command or a deceleration command based on the preceding vehicle information and the information of the subject vehicle, and provides the generated acceleration command or deceleration command to the electronic control unit 12. [

The electronic control unit 12 automatically controls acceleration / deceleration of the vehicle so as to maintain the distance between the vehicle and the preceding vehicle set during execution of the ACC mode. That is, the electronic control unit 12 generates the engine request torque according to the acceleration command or the acceleration command to the engine control unit 13 when the command generated from the sensor unit 11, particularly the radar sensor, is an acceleration command, And sends the generated braking demand torque to the brake control device 14 in response to the deceleration command or the braking demand torque according to the deceleration command.

In particular, the electronic control unit 12 compares the RPM of the engine detected by the RPM sensor 133 with the reference RPM per vehicle speed during the ACC mode to determine whether a shift is necessary, If the RPM of the engine is less than the minimum reference RPM in a state where the input of the clutch is not detected within a preset reference time after the request signal is generated and transmitted, the operation to the ACC mode is temporarily released and the driver is warned And outputs an alarm control signal.

When the input of the clutch is sensed so that the clutch can be operated in the stable ACC mode and the command provided from the radar sensor is automatic acceleration, the electronic control unit 12 temporarily releases the operation to the ACC mode, The operation in the ACC mode is maintained.

The engine control device 13 is an EMS (Engine Management System), and controls an engine that converts combustion energy generated by combustion of fuel into kinetic energy.

The brake control device 14 is controlled by the electronic control unit 12 to control the hydraulic pressure regulating unit 141 by ESC (Electronic Stability Control).

The engine control device 13 is controlled by the electronic control unit 12 to control the driving of the engine. Specifically, the engine control device 13 controls the driving of the engine based on the engine required torque transmitted from the electronic control unit 12. [ Controls the RPM of the engine to rise when the engine-requested torque is transmitted from the electronic control unit 12, and controls the RPM of the engine to descend when the engine torque of the deceleration is transmitted.

The engine control device 13 is connected to the transmission position sensor 131, the clutch position sensor 132, and the RPM sensor 133. The transmission position information, the clutch position information and the RPM sensed through the transmission position sensor 131, the clutch position sensor 132 and the RPM sensor 133 are transmitted to the electronic control unit 12 via the engine control device 13 in real time .

Therefore, the electronic control unit 12 compares the set reference RPM for each vehicle speed of the vehicle under running and the RPM sensed by the RPM sensor 133 based on the transmission position information while performing the ACC mode, And determines whether or not a clutch input is necessary based on the clutch position information from the clutch position sensor 132 after transmitting the shift request signal when upshifting or downshifting is necessary, The operation mode is controlled so that the operation of the ACC mode is temporarily canceled if the input is not within a predetermined time and the RPM received in real time is smaller than a preset minimum reference RPM (hereinafter referred to as a 'startup off occurrence condition'). The minimum reference RPM is set to a minimum RPM that does not turn off.

Since the operation of the ACC mode can be temporarily canceled when the engine is in the start-off off condition during the ACC mode, it is possible to prevent the engine from being turned off while performing the ACC mode instead of the driver's intention. The inconvenience of the driver due to the release of the ACC mode in the first stage in the adaptive cruise control system of a vehicle can be solved.

2, the electronic control unit 12 includes a receiving unit 121, a determining unit 122, a speed change determining unit 123, an adaptive cruise control unit 124, and a storage unit 125.

The receiving unit 121 receives the sensing information sensed by the radar sensor and the vehicle speed sensor included in the sensor unit 11. Here, the detection information includes the preceding vehicle information, the information of the subject vehicle, an acceleration command or a deceleration command, a vehicle speed, and the like.

The receiving unit 121 also receives the sensed information sensed by the transmission position sensor 131, the clutch position sensor 132 and the RPM sensor 133 via the engine control unit 13. Here, the sensed information is transmission position information, clutch position information, and RPM.

The determination unit 122 determines whether the operation mode of the vehicle is the ACC mode. The determination unit 122 also determines whether or not a shift is required during operation in the ACC mode.

Also, the determination unit 122 compares the reference RPM for each vehicle speed with the RPM received in real time from the RPM sensor 133, and determines that upshifting is necessary when the received RPM exceeds the reference RPM of the running vehicle, If the RPM is less than the reference RPM of the vehicle speed under running, it can be judged that downshifting is necessary. At this time, when the shift is necessary, it is preferable to inform the target shift speed because the vehicle is equipped with the manual transmission.

If it is determined that the shift is necessary as a result of the determination by the determination unit 122, the speed-change determining unit 123 determines the speed ratio of the transmission using the received RPM, the speed of the vehicle, and the transmission position information, Generates a request signal and transmits it to the outside.

The adaptive cruise control unit 124 determines whether or not the clutch input is sensed based on the clutch position information sensed by the clutch position sensor 132 after sending the shift request signal. If the clutch input is not sensed, The minimum reference RPM is compared and the operation mode is controlled so that the ACC mode is temporarily released if the start-off occurrence condition is satisfied. The starting off occurrence condition is that the RPM is smaller than the minimum reference RPM. The minimum reference RPM can be set for each speed change stage. Accordingly, the minimum reference RPM is extracted based on the transmission position information sensed by the transmission position sensor 131, and the extracted minimum reference RPM is compared with the received RPM in real time to determine whether or not the ACC mode It is possible to decide to hold / release the operation.

In particular, the adaptive cruise control unit 124 can control the operation mode to temporarily release the ACC mode when the command provided from the radar sensor is automatic acceleration after the input of the clutch is sensed. However, the adaptive cruise control unit 124 controls the operation mode to maintain the ACC mode when the command provided from the radar sensor is automatic deceleration after the input of the clutch is sensed.

The storage unit 125 stores setting information set by the preceding vehicle and the headway distance when performing the ACC mode. Also, the storage unit 125 stores the minimum reference RPM and further stores the minimum reference RPM for each gear change step. The storage unit 125 also stores a reference RPM for each vehicle speed.

An adaptive cruise control method of an adaptive cruise control system of a vehicle equipped with a manual transmission having such a configuration will now be described with reference to FIG.

3 is a flowchart illustrating an adaptive cruise control method of an adaptive cruise control system for a vehicle having a manual transmission according to an embodiment of the present invention.

Referring to FIG. 3, the electronic control unit 12 receives the ACC mode switch ON signal or the ACC mode driving signal for performing the ACC mode in which the acceleration / deceleration of the subject vehicle is controlled to perform autonomous traveling (S11).

The electronic control unit 12 calculates an appropriate distance between the preceding vehicle and the preceding vehicle based on the information of the preceding vehicle detected from the sensor unit 11, that is, the radar sensor, according to the received ACC mode switch- Or a deceleration command for maintaining an acceleration command or a deceleration command (S13).

The electronic control unit 12 determines whether the generated command is an acceleration command or a deceleration command (S15).

If it is determined in step S15 that the generated command is an acceleration command, the electronic control unit 12 provides the engine control unit 13 with an engine demand torque or acceleration command (S17).

If it is determined in step S15 that the generated command is a deceleration command, the electronic control unit 12 provides the deceleration request torque or deceleration command to the brake control device 14 (S18).

Thereafter, the electronic control unit 12 receives the RPM sensed by the RPM sensor 133 via the engine control device 13 (S19). At this time, the RPM of the running vehicle is received from the RPM sensor 133 in real time and transmitted to the electronic control unit 20.

The electronic control unit 12 determines whether or not a shift is necessary using the received RPM and reference RPM for each vehicle speed (S21). Here, it is already defined whether the adjustment of the speed change stage is necessary depending on whether the received RPM is larger or smaller than the reference RPM per vehicle speed. For example, if the received RPM is smaller than the reference RPM per vehicle speed, the vehicle is downshifted to a predetermined stage according to the difference of the first or the small degree. If the received RPM is larger than the reference RPM per vehicle speed, And can be determined by experience in advance so as to be shifted upward to a predetermined stage.

If it is determined in step S21 that the shifting is not required, the electronic control unit 12 determines whether or not an acceleration command is issued based on the sensing information sensed by the radar sensor so as to maintain an appropriate distance from the preceding vehicle Or moves the process to the above-described step S13 in which the deceleration command is generated.

If it is determined in step S21 that the shift is necessary, the electronic control unit 12 sends a shift request signal to notify the change of the necessary gear range (S23). At this time, the shift request signal may be displayed on the screen of the navigation terminal installed in the vehicle, but it may output voice through a speaker installed in the vehicle, and includes a shift stage number or gear stage number to be changed.

Thereafter, the electronic control unit 12 determines whether the input of the clutch is sensed (S25). At this time, the electronic control unit 12 receives the clutch position information sensed by the clutch position sensor 132 via the engine control device 13, and judges whether or not the input of the clutch is sensed based on the received clutch position information.

If it is determined in step S25 that the input of the clutch is not sensed, the electronic control unit 12 determines whether the received RPM satisfies the starting off occurrence condition, which is a condition smaller than the minimum reference RPM (S26).

If it is determined in step S26 that the start-up OFF condition is not satisfied, the electronic control unit 12 controls the operation mode so that the operation can be maintained in the ACC mode (S28).

As a result of the determination in step S26, when the start-off off condition is satisfied, the electronic control unit 12 controls the operation mode so that the ACC mode can be temporarily released, and outputs an alarm control signal informing the driver that the start- . When the start-off occurrence condition is satisfied, the ACC mode is temporarily released to reflect the passive intention of the driver, thereby preventing the start-up from being turned off.

If it is determined in step S25 that the input of the clutch is detected, the electronic control unit 12 determines whether the command received from the radar sensor is an automatic acceleration or an automatic deceleration (S27).

If it is determined in step S27 that the command received from the radar sensor is an automatic deceleration, the electronic control unit 12 moves the process to the above-described step S28 for controlling the operation mode so that the operation can be maintained in the ACC mode. Accordingly, the deceleration control for maintaining the proper distance from the preceding vehicle can be performed to stably maintain the proper distance from the preceding vehicle.

If it is determined in step S27 that the command received from the radar sensor is automatic acceleration, the electronic control unit 12 moves the process to the above-described step S29 for controlling the operation mode to temporarily release the ACC mode. And then controls the operation mode to return to the ACC mode after a predetermined time elapses. Accordingly, stable acceleration can be achieved even if the shift occurs after the input of the clutch.

The invention being thus described, it will be obvious that the same way may be varied in many ways. Such modifications are intended to be within the spirit and scope of the invention as defined by the appended claims.

11: sensor unit 12: electronic control unit
121: Receiving unit 122:
123: Transmission determining section 124: Cruise control section
125: storage part 13: engine control device
131: Transmission position sensor 132: Clutch position sensor
133: RPM sensor 14: Brake control device
141: Hydraulic control unit

Claims (6)

1. An adaptive cruise control system for a vehicle having a manual transmission,
A sensor unit for sensing the information of the preceding vehicle, the speed of the subject vehicle, the RPM of the engine, the position of the transmission, and the position of the clutch; And
Wherein the control unit controls the acceleration / deceleration of the subject vehicle so as to maintain an appropriate distance from the preceding vehicle based on the information sensed by the sensor unit, transmits a shift request signal during the adaptive cruise control mode, And an electronic control unit for temporarily canceling the operation of the adaptive cruise control mode if the RPM of the engine detected through the sensor unit is smaller than a preset minimum reference RPM. The method according to claim 1,
Wherein the electronic control unit outputs an alarm control signal for alarming a start-up OFF if the RPM of the engine is less than the minimum reference RPM. The method according to claim 1,
Wherein the electronic control unit temporarily cancels the operation of the adaptive cruise control mode when an instruction to maintain an appropriate distance from the preceding vehicle is an acceleration command when the input of the clutch is sensed and the operation of the adaptive cruise control mode The control means controls the operation mode so as to maintain the operation mode. An adaptive cruise control method of a vehicle using an adaptive cruise control system of a vehicle equipped with a manual transmission,
Receiving the information of the preceding vehicle sensed through the sensor unit provided in the vehicle, the speed of the subject vehicle, the RPM of the engine, the position of the transmission, and the position of the clutch;
Wherein the control unit controls the acceleration / deceleration of the subject vehicle based on the received information to maintain an appropriate distance from the preceding vehicle, and transmits the shift request signal during the adaptive cruise control mode to determine whether the clutch input is detected within a predetermined reference time ; And
If the input of the clutch is not sensed as a result of the determining step, temporarily releasing the operation of the adaptive cruise control mode if the RPM of the received engine is smaller than a predetermined minimum reference RPM Cruise control method. The method of claim 4,
The step of releasing
And outputting an alarm control signal for alarming the start-up OFF if the RPM of the engine is less than the minimum reference RPM. The method of claim 4,
After the determining step,
Wherein when the input of the clutch is sensed as a result of the determination, the operation of the adaptive cruise control mode is temporarily released if the command for maintaining the proper distance from the preceding vehicle is an acceleration command, Further comprising the step of controlling the operation mode to maintain the operation of the adaptive cruise control system.

Images