KR20120017989A - System for making a driver operate a car easily and acceleration controlling method of the same - Google Patents

Abstract

PURPOSE: A system for driver's convenience and a method for controlling acceleration thereof are provided to ensure safety during driving. CONSTITUTION: A method for controlling acceleration of a system for driver's convenience comprises: a step of measuring operation rate of a wiper mounted in a vehicle(S105); a step of determining whether the operation rate is over standard rate(S109); and a step of limiting the acceleration of the vehicle based on the level corresponding to the operation rate of the wiper.

Description

SYSTEM FOR MAKING A DRIVER OPERATE A CAR EASILY AND ACCELERATION CONTROLLING METHOD OF THE SAME

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driver comfort system and an acceleration control method thereof, and to a driver comfort system and an acceleration control method thereof capable of securing stability in bad weather or slippery road surfaces.

Driver comfort systems, such as the Adaptive Cruise Control (ACC) system, allow the throttle valves, brakes and transmissions of the vehicle to be moved through the position and distance of the preceding vehicle detected by the radar mounted in front of the vehicle. It is a system that maintains proper distance with the preceding vehicle by performing proper acceleration and deceleration by automatic control.

This ACC system is an important vehicle control technology in the field of Intelligent Transportation System (ITS), which is currently being put into practical use. This ACC system can be thought of as extending the function of the cruise control system. Like the constant speed control system, the steering wheel operation is left to the driver or the throttle valve and the brake of the engine controlled by the pedals are transferred to the electronic control unit. The automatic operation by the actuator according to the command gives the driver's convenience (the driver only handles the steering wheel) and stability (prevents accidental accidents due to the driver's carelessness) and the efficiency of the use of the road (closes the vehicle in the city).

The above-described ACC system employs a distance / speed measurement sensor between vehicles to control driving while maintaining a distance between the preceding vehicle and the vehicle, for example, about 100 meters in a high-speed driving situation such as a highway.

If the vehicle is running slowly, such as in the city, a traffic jam assist (TJA) system is used to keep the gap between the preceding vehicles narrow. The driver's fatigue can be reduced by automatically accelerating and decelerating. The TJA system controls the vehicle to travel while maintaining a proper distance, such as 50 meters, in advance and when driving in a city or traffic region.

However, the driver's comfort system can be operated according to the driver's operation. The driver's comfort system operates according to the deceleration and acceleration algorithm developed for the first time according to the speed and distance conditions set by the driver. There is a problem that the performance of the front sensor is reduced, the braking distance is long in a slippery road surface state. The current driver's comfort system does not consider the weather conditions, increasing the risk of collision due to poor performance in bad weather.

SUMMARY OF THE INVENTION An object of the present invention is to provide a driver comfort system and an acceleration control method thereof, by adjusting the acceleration of a vehicle according to a grade corresponding to the operating speed of a wiper operating in bad weather, so that the vehicle and stability can be secured even in bad weather. In providing.

Acceleration control method of a driver comfort system according to an embodiment of the present invention for achieving the above object comprises the steps of measuring the operating speed of the wiper installed in the vehicle; Determining whether the measured operating speed of the wiper exceeds a reference speed; And limiting the acceleration of the vehicle according to a grade corresponding to the measured operating speed of the wiper among predetermined grades when the reference speed is exceeded.

The predetermined class includes a first class for adjusting the acceleration performance so that the time to reach the target speed of the vehicle is long, a second class for adjusting the acceleration performance while limiting the maximum set speed of the vehicle, and the vehicle and the preceding vehicle. It is preferable to include a third grade that adjusts the acceleration performance while limiting the minimum following distance of the liver.

Acceleration control method of a driver comfort system according to an embodiment of the present invention, before the measuring step, receives the amount of rain water detected by the rain sensor installed in the vehicle, or the wiper selected by the driver Preferably, the method further includes receiving information on an operation mode of the.

The measuring step preferably measures the operating speed of the wiper based on the information received by the receiving step.

In addition, the driver comfort system according to another embodiment of the present invention includes a measuring unit for measuring the operating speed of the wiper installed in the vehicle; A determination unit that determines whether the measured operation speed of the wiper exceeds a reference speed; A determination unit that determines a grade corresponding to the operation speed of the wiper among predetermined grades when the operation speed of the wiper exceeds a reference speed as a result of the determination of the determination unit; And an acceleration controller for adjusting the acceleration of the vehicle according to the determined grade.

The predetermined class includes a first class for adjusting the acceleration performance so that the time to reach the target speed of the vehicle is long, a second class for adjusting the acceleration performance while limiting the maximum set speed of the vehicle, and the vehicle and the preceding vehicle. It is preferable to include a third grade that adjusts the acceleration performance while limiting the minimum following distance of the liver.

In addition, the driver comfort system according to another embodiment of the present invention receives the amount of rain water detected by the rain sensor (rain sensor) installed in the vehicle, or receiving unit for receiving information on the operation mode of the wiper selected by the driver It is preferable to further include.

Preferably, the measuring unit measures an operating speed of the wiper based on the information received through the receiving unit.

According to the embodiment of the present invention, by adjusting the acceleration of the vehicle according to the grade corresponding to the operating speed of the wiper operating in bad weather, there is an effect that can ensure stability in bad weather or slippery road surface.

In addition, according to an embodiment of the present invention, even if the vehicle is not equipped with a rain detection sensor, by limiting the acceleration of the vehicle based on the operation mode of the wiper selected by the driver, it is also possible to reduce the degree of damage even if a collision situation occurs have.

1 is a view for explaining a driver convenience system according to an embodiment of the present invention.
2 is a flowchart illustrating an acceleration control method of a driver comfort system according to another exemplary embodiment of the present invention.
3 is a graph showing the acceleration performance of the vehicle adjusted according to the first class.
4 is a graph showing the maximum set speed of the vehicle adjusted according to the second class.
5 is a view showing a minimum tracking distance between vehicles adjusted according to the third grade.

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

1 is a view for explaining a driver convenience system according to an embodiment of the present invention.

Referring to FIG. 1, the driver comfort system 30 according to an exemplary embodiment of the present invention may be an adaptive cruise control (ACC) system or a traffic jam assist (TJA) system, for example, to determine a proper distance from a preceding vehicle (not shown). While keeping the host vehicle running, it limits the speed of the vehicle based on the operating speed of the wiper.

Here, the ACC system detects the position and distance of the preceding vehicle at high speed and automatically controls the throttle valve, brake, and transmission through the detected position and distance of the preceding vehicle to perform appropriate acceleration and deceleration. It detects the position and distance of the preceding vehicle when driving the section or the congestion section and automatically controls the throttle valve, brake and transmission through the detected position and distance of the preceding vehicle to perform appropriate acceleration and deceleration.

The driver convenience system 30 includes a radar module 31, a detector 32, and an electronic control unit 33.

The radar module 31 is installed in front of the vehicle. The radar module 31 emits a radar signal to the preceding vehicle and receives the radar signal reflected back from the preceding vehicle.

The detector 32 may be a raindrop sensor installed in the vehicle. The raindrop sensor can detect the amount of rainwater and measure the speed of the wiper based on the amount of rainwater. In addition, in a vehicle without a raindrop sensor, the operating speed of the wiper may be measured based on the operating mode of the wiper selected by the driver.

The electronic control unit 33 extracts the driving information of the preceding vehicle by analyzing the radar signal received by the radar module 31 to extract the distance, the speed and the angle of the preceding vehicle.

In addition, the electronic control unit 33 may control the speed of the vehicle to limit the speed of the vehicle according to the corresponding grade among the predetermined grades while maintaining the following distance with the preceding vehicle.

In more detail, the electronic control unit 33 may include a receiver 331, a measurer 332, a determiner 333, a determiner 334, and an acceleration controller 335.

The receiver 331 may receive the amount of rainwater detected through the raindrop detection sensor, or may receive information about an operation mode of the wiper selected by the driver.

The wiper operation mode is a first operation mode in which the wiper operation is continuously performed twice or more, for example, between 0.5 seconds and 5 seconds, a second operation mode in which the wiper operation is continuously performed at a low speed, and a high speed ( high speed) and a third mode of operation in which the wiper operation is performed continuously.

The memory (not shown) may store the maximum set speed and the minimum following distance set through the driver interface. In addition, the memory (not shown) may store a range of first to third grades for differentially controlling the acceleration of the vehicle according to the operating speed of the wiper. The first grade is satisfied when the wiper operation mode is operated for a predetermined time in the first operation mode, the second grade is satisfied when the wiper operation mode is operated for a predetermined time in the second operation mode, and the wiper operation mode is In the case of operating for a predetermined time in the three operation modes, it is determined that the third grade is satisfied, and it is set to any one of the first to third grades according to the amount of rain water detected by the raindrop sensor.

The measuring unit 332 measures the operating speed of the wiper based on the information received through the receiving unit 331. That is, the operating speed of the wiper is measured based on the amount of rainwater detected by the raindrop sensor, or the operating speed of the wiper is measured based on information on the operating mode of the wiper in operation.

The determination unit 333 determines whether the vehicle speed of the vehicle exceeds a reference vehicle speed, for example, 30 kph.

As a result of the determination by the determination unit 333, when the vehicle speed of the vehicle exceeds the reference vehicle speed, the determination unit 333 determines whether the operation speed of the wiper measured by the measurement unit 332 exceeds the reference speed.

As a result of the determination by the determination unit 333, when the measured speed of the wiper operation exceeds the reference speed for a predetermined time, the determination unit 334 adjusts the speed of the vehicle according to the operation speed of the wiper among predetermined grades. Decide The predetermined class limits the first class that adjusts the acceleration performance so that the time to reach the target speed of the vehicle is longer, the second class that adjusts the acceleration performance while limiting the maximum speed of the vehicle, and the minimum estimated distance between the vehicle and the vehicle ahead. While adjusting the acceleration performance.

The acceleration controller 335 limits the acceleration of the vehicle according to the class determined by the determiner 334 based on, for example, the maximum set speed and the following distance of the driver set through the driver interface.

When the grade determined by the determiner 334 is the first grade, the acceleration controller 335 controls the acceleration of the vehicle so that the caustic performance is adjusted so that the time to reach the target speed of the vehicle is long, and the determination unit 334 When the grade determined by the second grade is controlled, the acceleration of the vehicle is controlled to regulate the acceleration performance while limiting the maximum set speed of the vehicle. When the grade determined by the determiner 334 is the third grade, the minimum between the own vehicle and the preceding vehicle is determined. The acceleration of the vehicle is controlled to adjust the acceleration performance while limiting the following distance.

The acceleration controller 335 provides a target acceleration to the torque controller. The torque controller then provides the engine controller with a target acceleration coat generated based on the target acceleration, so that the acceleration performance of the vehicle is adjusted at the engine controller.

Accordingly, even when the performance of the front sensor in a rainy weather or slippery road surface conditions, the acceleration of the vehicle can be adjusted according to the grade corresponding to the operating speed of the wiper to ensure stability with the preceding vehicle.

The speed control method of the driver comfort system having such a configuration will be described with reference to FIG. 2 as follows.

The electronic control unit 33 receives the vehicle speed of the vehicle (S101).

Next, the electronic control unit 33 determines whether the vehicle speed of the vehicle exceeds the reference vehicle speed (S103).

As a result of the determination in step S103, when the vehicle speed of the vehicle does not exceed the reference vehicle speed, the electronic control unit 33 controls to run while maintaining the following distance with the preceding vehicle (S117). In this case, the following distance may be a following distance set through the driver interface. The electronic control unit 33 emits a radar signal to the preceding vehicle by the radar module 31 installed in front of the vehicle, and receives the radar signal reflected from the preceding vehicle by the radar module 31 and returns. Control to keep following distance.

As a result of the determination in step S103, when the vehicle speed of the vehicle exceeds the reference vehicle speed, the electronic control unit 33 measures the operating speed of the wiper (S105).

Prior to measuring the wiper's operating speed, it receives the amount of rainwater detected by the raindrop sensor, or receives information on the wiper's operating mode, and receives information on the amount of rainwater received or the wiper's operating mode. The operating speed of the wiper can be measured based on this.

Next, the electronic control unit 33 determines whether the measured operating speed of the wiper exceeds a preset reference speed (S107).

As a result of the determination in step S107, when the measured operation speed of the wiper does not exceed the preset reference speed, the electronic control unit 33 moves the process to step S117 described above while maintaining the preset maximum set speed and following distance. Let it run Accordingly, the heterogeneity of the driver may be minimized before the wiper operation speed becomes a preset reference speed, for example, 50% or more.

As a result of the determination in step S107, when the measured operating speed of the wiper exceeds a preset reference speed, the electronic control unit 33 determines the grade corresponding to the operating speed of the wiper (S109).

Next, the electronic control unit 33 determines whether the determined grade is the first grade (S111).

As a result of the determination in step S111, when the determined grade is the first grade, the electronic control unit 33 reduces the acceleration performance so that the time to reach the target speed of the vehicle becomes longer (S112). In this way, the acceleration performance can be limited to prevent sudden acceleration, and unlike the deceleration, the acceleration can be limited to keep the average vehicle speed low.

In the graph shown in FIG. 3, (a) is a graph showing the average speed in the normal control to maintain the set maximum set speed and the following distance, and (b) is in the attenuation control to limit the acceleration performance in accordance with the first grade It is a graph showing the average speed. As shown in (b) of FIG. 3, it can be seen that the 90% arrival time of the target speed is longer by (t).

As a result of the determination in step S111, when the determined grade is not the first grade, the electronic control unit 33 determines whether the determined grade is the second grade (S113).

As a result of the determination in step S113, when the determined grade is the second grade, the electronic control unit 33 controls the acceleration of the vehicle within the limited maximum set speed by limiting the set maximum set speed (S114), and the above-described S112. Reduce the acceleration performance by moving the process to steps.

As shown in the graph shown in FIG. 4, when it is adjusted at a limited maximum set speed in comparison with the maximum set speed in a steady state, the braking distance by the designated area can be reduced, and the braking distance can be reduced within a predetermined value.

As a result of the determination in step S113, when the determined grade is not the second grade, the electronic control unit 33 determines that the determined grade is the third grade, thereby limiting the set minimum following distance and thus accelerating the vehicle within the limited minimum following distance. The control is controlled to be adjusted (S115), and the process moves to the above-described step S114 to control the acceleration of the vehicle within the maximum set speed.

FIG. 5 (a) shows the following distance in the steady state, and FIG. 5 (b) shows the following distance between the host vehicle and the preceding vehicle when the operating speed of the wiper corresponds to the third class. If the operating speed of the wiper in the third class in rainy weather, it can be limited to the minimum estimated distance to ensure the required braking distance in case of sudden braking situation.

By doing so, it is possible to reduce the risk of collision with the preceding vehicle by limiting the speed of the vehicle in accordance with the class corresponding to the wiper operating speed of the vehicle in the deterioration of the front sensor during a rainy weather or on a slippery road surface.

In another embodiment, the acceleration of the vehicle may be adjusted to limit the maximum set speed when the second grade is satisfied and to limit the minimum following distance when the third grade is satisfied.

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.

30: driver convenience system 31: radar module
32: detector 33: electronic control unit
331: receiving unit 332: measuring unit
333: the determination unit 334: the determination unit
335 acceleration control unit

Claims (6)

Measuring an operating speed of a wiper installed in the vehicle;
Determining whether the measured operating speed of the wiper exceeds a reference speed; And
And determining the acceleration of the vehicle according to a grade corresponding to the measured operating speed of the wiper among predetermined grades when the reference speed is exceeded. Acceleration control method. The method according to claim 1,
The predetermined grade is
A first class for adjusting acceleration performance so that a time for reaching the target speed of the vehicle is long,
A second class for adjusting acceleration performance while limiting a maximum set speed of the vehicle;
And a third class of controlling acceleration performance while limiting a minimum following distance between the vehicle and the preceding vehicle. The method according to claim 1,
Before the measuring step,
Receiving an amount of rainwater detected by a rain sensor installed in the vehicle, or receiving information on an operation mode of a wiper selected by a driver;
The measuring step
And measuring an operating speed of the wiper based on the information received by the receiving step. A measuring unit measuring an operating speed of the wiper installed in the vehicle;
A determination unit that determines whether the measured operation speed of the wiper exceeds a reference speed;
A determination unit that determines a grade corresponding to the operation speed of the wiper among predetermined grades when the operation speed of the wiper exceeds a reference speed as a result of the determination of the determination unit; And
And an acceleration controller for adjusting the acceleration of the vehicle according to the determined grade. The method of claim 4,
The predetermined grade is
A first class for adjusting acceleration performance so that a time for reaching the target speed of the vehicle is long,
A second class for adjusting acceleration performance while limiting a maximum set speed of the vehicle;
And a third class that adjusts acceleration performance while limiting a minimum following distance between the vehicle and the preceding vehicle. The method of claim 4,
The apparatus may further include a receiver configured to receive an amount of rainwater detected by a rain sensor installed in the vehicle, or to receive information on an operation mode of a wiper selected by a driver.
And the measuring unit measures an operating speed of the wiper based on the information received through the receiving unit.

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