KR20080023284A - Auto cruise control system for car to improve a fuel efficiency - Google Patents

Auto cruise control system for car to improve a fuel efficiency Download PDF

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Publication number
KR20080023284A
KR20080023284A KR1020060087126A KR20060087126A KR20080023284A KR 20080023284 A KR20080023284 A KR 20080023284A KR 1020060087126 A KR1020060087126 A KR 1020060087126A KR 20060087126 A KR20060087126 A KR 20060087126A KR 20080023284 A KR20080023284 A KR 20080023284A
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South Korea
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speed
driving
vehicle
constant speed
traveling
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KR1020060087126A
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Korean (ko)
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김성주
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김성주
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Priority to KR1020060087126A priority Critical patent/KR20080023284A/en
Publication of KR20080023284A publication Critical patent/KR20080023284A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K31/00—Vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed, i.e. preventing speed from exceeding an arbitrarily established velocity or maintaining speed at a particular velocity, as selected by the vehicle operator
    • B60K31/18—Vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed, i.e. preventing speed from exceeding an arbitrarily established velocity or maintaining speed at a particular velocity, as selected by the vehicle operator including a device to audibly, visibly, or otherwise signal the existence of unusual or unintended speed to the driver of the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/14—Adaptive cruise control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K31/00—Vehicle fittings, acting on a single sub-unit only, for automatically controlling vehicle speed, i.e. preventing speed from exceeding an arbitrarily established velocity or maintaining speed at a particular velocity, as selected by the vehicle operator
    • B60K2031/0091—Speed limiters or speed cutters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2300/00—Purposes or special features of road vehicle drive control systems
    • B60Y2300/14—Cruise control
    • B60Y2300/143—Speed control

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Controls For Constant Speed Travelling (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)

Abstract

A method for controlling a speed of a vehicle is provided to improve the fuel efficiency by utilizing inertia energy, which is created when the vehicle is traveling, based on the road condition. In a method for controlling a speed of a vehicle, whether a steady speed release signal is received or not is determined(S120). If the steady speed release signal is not received, whether a traveling speed is within a range from a minimum operation speed to a maximum operation speed or not is determined. If the traveling speed is greater than the minimum operation speed(S130), the traveling speed is accelerated(S140) and then whether the traveling speed exceeds the maximum operation speed or not is determined(S150). If the traveling speed exceeds the maximum operation speed, a neutral mode driving is performed(S160). After determining whether an abnormal speed variation is shown or not(S170), a control cruise is performed(S180).

Description

연비개선을 위한 차량용 정속 주행 제어 방법 {Auto cruise control system for car to improve a fuel efficiency}Auto cruise control system for car to improve a fuel efficiency

도 1은 본 발명에 따른 차량용 정속주행 제어 장치 구성 블록도.1 is a block diagram of a constant speed control apparatus for a vehicle according to the present invention.

도 2는 본 발명에 적용되는 차량용 정속제어 방법 동작 순서도이다.2 is a flowchart illustrating a constant speed control method for a vehicle applied to the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

100 : 차량주행상태 검출장치100: vehicle driving state detection device

110 : 정속주행 On/Off 선택 스위치110: constant speed driving On / Off selection switch

120 : 차속 검출부120: vehicle speed detection unit

200 : 정속주행 제어장치200: cruise control

300 : 구동장치300: drive device

본 발명은 차량용 정속주행 제어 방법에 관한 것으로, 더욱 상세하게는 정속주행시 차량이 가지는 관성에너지를 최대한 활용하여 정속주행함으로써 정속주행함은 물론 연비를 개선하기 위한 차량용 정속주행 제어방법에 관한 것이다. 일반적으로 크루즈 컨트롤 정속주행은 주행중에 희망하는 자동차 속도에 도달하였을 때, 세 트스위치를 조작하면 이후에는 가속페달을 조작하지 않아도 세트된 차량 속도로 정속 주행할 수 있는 시스템으로서 고속도로 운행 등의 장시간 운전할 때 운전자의 피로를 경감할 수 있다. The present invention relates to a constant speed driving control method for a vehicle, and more particularly, to a constant speed driving by utilizing the inertial energy of the vehicle at the time of the constant speed driving in a constant speed, as well as to a constant speed driving control method for improving the fuel economy. In general, cruise control cruise control is a system that can drive at a constant speed at a set vehicle speed without operating the accelerator pedal when the set switch is operated when the desired vehicle speed is reached while driving. When the driver's fatigue can be reduced.

한편, 순간적인 경우의 작동 해제의 확실성과 장치의 고장에 대한 페일 세이프 등 안전성면에서도 충분한 배려가 필요하지만 일정한 속도를 최소의 연비로 유지하는 것도 에너지난이 이슈화되고 있는 현실정에 에너지 절약 차원에서 필요하다. 따라서 종래에는 운전자가 설정한 속도로 정속 주행을 실시할 경우 속도를 유지하기 위해서 연료분사량을 조절하는 방법을 이용하게 된다. 상기에서 크루즈 컨트롤 정속주행을 시작하게 되면 일반적으로 해당속도에 알맞은 엔진의 회전수를 유지시켜주는 방법으로 속도를 유지하며 주행하게 된다.On the other hand, sufficient consideration must be given in terms of safety such as fail-safe operation and fail-safe for failure of the device, but maintaining constant speed at the lowest fuel economy is an energy-saving issue. need. Therefore, conventionally, when constant speed travel is performed at the speed set by the driver, a method of adjusting the fuel injection amount is used to maintain the speed. When the cruise control cruise control is started in the above manner, driving is maintained in a manner that maintains the engine speed appropriate to the speed.

그러나, 상기한 종래의 방법은 정속주행을 위해 일정한 속도를 유지하기 위해 속도에 해당하는 연료를 계속해서 소비하는 방법으로 불필요한 에너지를 낭비할 수 있으며 자동차가 주행시 가지게 되는 관성에너지를 전혀 이용하지 못하여 정속주행은 만족하지만 에너지 절약측면에서는 문제점을 내포하고 있다. 실제로 상기한 종래의 방법을 통해 내리막길을 정속주행으로 주행할 경우 엔진과 미션간의 연결을 끊는 중립주행을 통해서 연료의 추가적인 소모없이 관성에너지만으로 일정속도를 유지하면서 달릴 수 있음에도 불구하고 주행속도에 해당하는 엔진회전수를 유지하여 그에 따른 연료를 소비하며 달리게 된다. However, the conventional method is a method of continuously consuming the fuel corresponding to the speed in order to maintain a constant speed for a constant speed driving can waste unnecessary energy and can not use any inertial energy that the vehicle has to drive at constant speed Although driving is satisfactory, there are problems in terms of energy saving. In fact, when driving downhill at a constant speed through the conventional method described above, it is possible to run while maintaining a constant speed with only inertia energy without additional fuel consumption through a neutral driving that disconnects the engine and the mission. The engine speed is maintained and the fuel is consumed accordingly.

따라서 본 발명의 목적은 상기한 문제점을 해결하기 위한 것으로, 자동차가 주행시 가지게 되는 관성에너지와 지형적 이점을 최대한 활용하여 연비를 절감하며 정속주행을 가능하도록 하는 제어방법을 제공하기 위한 것으로 기존의 크루즈 운행시스템의 기본적인 방법인 속도에 따른 연소분사량을 조절하여 속도를 유지하는 것이 아니라 최소 동작 차속과 최대 동작 차속의 동작 속도 범위를 가지고 가속주행과 중립주행을 반복하며 정속 운행을 실시하고, 내리막길, 오르막길과 같이 중립주행이 불가능할 경우에는 정속 제어 주행을 하는 제어방법이다.Therefore, an object of the present invention is to solve the above problems, to maximize the inertial energy and topographical advantages that a vehicle has while driving to provide a control method to reduce fuel consumption and enable constant speed driving. Rather than maintaining the speed by adjusting the combustion injection rate according to the speed, which is the basic method of the system, it performs the constant speed operation by repeating the acceleration driving and the neutral driving with the operating speed range of the minimum operating speed and the maximum operating speed. When neutral driving is not possible as shown in FIG.

상기한 목적을 달성하기 위한 본 발명은, 주행중 정속주행이 해제된 상태에서 정속주행을 설정하고, 정속해제 신호가 입력되었는가를 판단하는 단계와; The present invention for achieving the above object comprises the steps of setting the constant speed driving in the state in which the constant speed driving is released, and determining whether the constant speed release signal is input;

정속 주행 시스템으로 주행을 하게 될 경우 정속을 결정하는 단계와; Determining a constant speed when driving in the constant speed traveling system;

상기 단계에서 정속주행 해제 신호가 입력되지 않은 경우 실제 주행속도가 최소 동작 속도와 그에 따른 최대 동작속도 내에 있는지를 판단하는 단계와;Determining whether the actual driving speed is within the minimum operating speed and accordingly the maximum operating speed when the cruise control release signal is not input in the step;

상기 단계에서 실 주행차속이 최소 동작 속도보다 작지 않다고 판단되면, 가속주행을 실시하며 실 주행속도가 최대동작 차속보다 빠른지를 판단하는 단계와;If it is determined in the step that the actual traveling vehicle speed is not smaller than the minimum operating speed, performing acceleration driving and determining whether the actual traveling speed is faster than the maximum operating vehicle speed;

상기 단계에서 실 주행속도가 최대 동작 속도보다 빠를 경우 중립모드 운행을 실시하는 단계와; Performing a neutral mode operation when the actual driving speed is faster than the maximum operating speed in the step;

상기 단계에서 실 주행속도가 최소 동작 속도보다 빠른지 판단하는 단계와;Determining whether the actual traveling speed is faster than the minimum operating speed in the step;

상기 단계에서 실 주행속도가 최소 동작 속도보다 빠른 경우 계속적으로 중립모드 주행을 실시하고, 최소 동작 속도에 도달할 경우 가속주행을 실시하는 단계와;Continuously driving the neutral mode when the actual driving speed is faster than the minimum operating speed, and performing the acceleration driving when the minimum operating speed is reached;

상기 단계에서 중립모드 운행시 비정상적인 속도변화를 보이는지 판단하는 단계와;Determining whether an abnormal speed change occurs when the vehicle is operated in the neutral mode;

상기 단계에서 비정상적인 주행이 이루어질 경우 제어주행을 실시하는 단계로 이루어지는 것을 특징으로 한다.When the abnormal driving is made in the above step is characterized in that the step of performing a control run.

이하 본 발명의 실시예를 첨부된 예시도면을 참조로 상세히 설명한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도1은 본 발명에 따른 차량용 정속주행 제어 장치 구성 블록도로서, 차량주행상태 검출장치(100)는 차량의 주행상태 변화에 따라 가변되어 출력되는 소정의 신호를 검출하고, 정속주행 제어장치(200)는 상기 차량 주행상태 검출장치(100)에서 검출되어 입력되는 소정의 신호들을 입력받아 주행 중 정속주행이 해제되면 정속주행을 재설정하고, 정속주행 해제 신호가 입력되었는가를 판단하여 상기 정속주행 해제 신호가 입력되지 않은 경우, 실 주행차속이 최소 동작 차속보다 작은가를 판단하고, 상기에서 실 주행차속이 최대 동작 차속보다 빠르지 않다고 판단되면, 최대 동작 차속까지 가속주행을 실시하고, 상기에서 실 주행차속이 최대 동작 차속보다 빠른지 여부를 판단하고, 빠르다고 판단되면 중립주행을 실시한다. 상기에서 실 주행차속이 최소 동작 차속보다 빠른지를 판단하여, 최소 동작 차속보다 빠른 경우에는 계속적으로 중립주행을 실시하며, 최소 동작 차속에 도달하였을 경우에는 다시 가속주행을 실시하여 위의 과정을 반복하여 실시한다. 상기에서 중립주행을 실시할 경우 차량의 비정상적인 속도 변화가 보일 경우 제어주행을 실시한다. 1 is a block diagram illustrating a configuration of a constant speed driving control apparatus for a vehicle according to the present invention. The vehicle driving state detecting apparatus 100 detects a predetermined signal that is varied and output according to a change in driving state of a vehicle, and the constant speed driving control apparatus 200 is shown in FIG. ) Receives the predetermined signals detected and input by the vehicle driving state detecting apparatus 100, resets the constant speed driving when the constant speed driving is released, and determines whether the constant speed driving release signal has been input. If is not input, it is determined whether the actual traveling vehicle speed is smaller than the minimum operating vehicle speed. If it is determined that the actual traveling vehicle speed is not faster than the maximum operating vehicle speed, acceleration driving is performed to the maximum operating vehicle speed, and the actual driving vehicle speed is It determines whether it is faster than the maximum operating speed, and if it is fast, performs neutral driving. In this case, it is determined whether the actual driving vehicle speed is faster than the minimum operating vehicle speed, and when the vehicle is faster than the minimum operating vehicle speed, the vehicle continues to be neutrally driven. When the minimum operating vehicle speed is reached, the vehicle is accelerated again and the above process is repeated. Conduct. In the case of performing the neutral driving in the above, if the abnormal speed change of the vehicle is seen, the control driving is performed.

상기에서 차량 주행상태 검출장치(100)는 운전자의 조작상태에 따라 스위치의 상태가 온/오프 되어 차량의 차속을 정속주행 할 수 있도록 설정하기 위한 정속 주행 선택 온/오프 스위치(110)와 주행중인 차량의 주행차속을 검출하는 차속 검출부(120)로 이루어져 있다. The vehicle driving state detection device 100 is driving with the constant speed driving selection on / off switch 110 for setting the state of the switch on / off according to the driver's operation state so that the vehicle speed can be driven at constant speed. The vehicle speed detection unit 120 detects the traveling vehicle speed of the vehicle.

상기한 구성으로 이루어진 차량용 정속주행 제어 방법을 첨부한 도 2를 참조하여 설명한다.With reference to Figure 2 attached to the constant speed driving control method for a vehicle having the above configuration will be described.

주행중인 차량에서 차량 주행상태 검출장치(100)는 정속주행 선택 온/오프 스위치, 차속 등을 검출한다. 이에, 정속주행 제어 장치(200)는 상기 정속주행 선택 온/오프 스위치, 차속 등을 입력받고자, 소정의 제어신호를 차량 주행상태 검출장치(100)에 보내면, 차량 주행상태 검출장치(100)는 상기 정속 주행 제어장치(200)에서 받은 소정의 제어신호에 해당하는 정속주행 선택 온/오프 스위치, 차속의 신호를 출력한다. The vehicle driving state detecting apparatus 100 detects a constant speed driving select on / off switch, a vehicle speed, and the like in a driving vehicle. Accordingly, the constant speed driving control apparatus 200 sends a predetermined control signal to the vehicle driving state detecting apparatus 100 to receive the constant speed selecting on / off switch, vehicle speed, and the like, and the vehicle driving state detecting apparatus 100 Outputs a constant speed selection on / off switch corresponding to a predetermined control signal received from the constant speed traveling control device 200 and a signal of a vehicle speed.

정속주행 제어장치(200)는 상기 차량 주행상태 검출장치(100)에서 보내진 정속주행 선택 온/오프 스위치, 차속의 신호를 입력받아 정속주행 상태가 해제된 상태에서 자동 크루즈 설정 스위치를 작동시켜 정속주행을 설정하면, 정속주행 작동 해제 신호가 입력되었는가를 판단한다.(S100~S120)The constant speed driving control device 200 receives the constant speed driving selection on / off switch sent from the vehicle driving state detecting device 100 and the signal of the vehicle speed, and operates the automatic cruise setting switch while the constant speed driving state is released. If it is set, it is determined whether the cruise control release signal is input. (S100 to S120)

상기에서 정속주행 중인 차량에서 정속주행 작동 해제 신호가 입력되지 않음이 판단되면, 정속주행 제어장치(200)는 현재 주행속도가 기 설정된 정속 주행 최소 동작 속도보다 큰 경우, 정속 주행 제어장치(200)는 정속주행 최소 동작 속도에 따라 자동으로 설정된 정속주행 최대 동작속도보다 크고 작은 여부를 판단한다 .(S150)If it is determined that the constant speed driving deactivation signal is not input from the vehicle in the constant speed driving, the constant speed driving control device 200 determines that the current speed is greater than the preset constant speed minimum driving speed. The controller determines whether the driving speed is greater than or less than the maximum driving speed set automatically according to the minimum driving speed.

상기에서 실 주행속도가 최대 동작 속도보다 작은 경우에는 가속 주행(S140)을 실시하며 (S150)의 과정을 반복한다. When the actual traveling speed is smaller than the maximum operating speed, the accelerated driving (S140) is performed, and the process of S150 is repeated.

상기에서 실 주행속도가 최대 동작 속도보다 큰 경우에는 중립주행(S160)을 실시하며 저항 및 지형, 각종 장애물에 따른 속도변화가 정상적인지 판단한다.(S170)If the actual running speed is greater than the maximum operating speed, the neutral driving (S160) is performed and it is determined whether the speed change according to the resistance, the terrain, and various obstacles is normal (S170).

상기에서 저항 및 지형, 각종 장애물에 따른 속도 변화가 정상적일 경우에는 중립주행(S160)을 계속적으로 실시하며, 비정상적인 경우에는 속도제어 주행(S180)을 실시한다. If the speed change according to the resistance, terrain, and various obstacles is normal, neutral driving (S160) is continuously performed, and if abnormal, speed control driving (S180) is performed.

상기에서 속도제어 주행(S180)을 할 경우 속도가 비정상적으로 감속할 경우에는 가속주행을 실시하며, 비정상적으로 증가할 때는 중립주행상태에서 브레이크를 통한 속도제어를 실시한다.In the case of the speed control driving (S180), when the speed is abnormally reduced, acceleration driving is performed. When abnormally increasing, speed control through the brake is performed in the neutral driving state.

상기 과정을 모두 실시한 후에는 S120의 과정으로 돌아가서 상기의 과정을 반복 실행한다.After performing the above process, the process returns to the process of S120 and repeats the above process.

이로서, 기존의 크루즈 제어장치를 그대로 사용하여 추가의 레이더 센서나 액티브 액츄에이터의 장착과 연비 개선을 위한 다른 노력없이 지능형 정속 제어 운행 및 연료절감을 수행할 수 있다.In this way, the existing cruise control device can be used as it is to perform intelligent constant speed control operation and fuel saving without additional efforts to install additional radar sensors or active actuators and improve fuel efficiency.

본 발명에 다른 차량용 정속주행 제어방법은 자동차가 주행시 가지게 되는 관성에 의한 에너지를 최대한 이용하여 정속주행을 실시함으로써 연료 소비량을 감소하는데 있다.The constant speed control method for a vehicle according to the present invention is to reduce fuel consumption by performing a constant speed drive using the energy due to the inertia that a vehicle has when driving.

Claims (1)

주행중 정속주행이 해제된 상태에서 정속주행을 설정하고, 정속해제 신호가 입력되었는가를 판단하는 단계와; 상기 단계에서 정속주행 해제 신호가 입력되지 않은 경우, 실제 주행속도가 최소 동작 속도와 그에 따른 최대 동작 속도내에 있는지를 판단하는 단계와; 상기 단계에서 실 주행차속이 최소 동작 차속보다 작지 않다고 판단되면, 가속주행을 실시하며 실 주행속도가 최대 동작 차속보다 빠른지를 판단하는 단계와; 상기단계에서 실 주행속도가 최대 동작 속도보다 빠를 경우 중립모드 운행을 실시하는 단계와; 중립모드 운행시 비정상적인 속도변화를 보이는지 판단하는 단계와;상기 단계에서 비정상적인 주행이 이루어질 경우 제어주행을 실시하는 단계로 이루어지는 것을 특징으로 하는 차량용 정속주행 제어 방법Setting a constant speed driving while the constant speed driving is released while driving and determining whether a constant speed cancel signal is input; Determining whether the actual traveling speed is within the minimum operating speed and accordingly the maximum operating speed when the constant speed releasing signal is not input in the step; If it is determined in the step that the actual traveling vehicle speed is not smaller than the minimum operating vehicle speed, performing acceleration driving and determining whether the actual traveling speed is faster than the maximum operating vehicle speed; Performing a neutral mode operation when the actual traveling speed is faster than the maximum operating speed in the above step; Determining whether an abnormal speed change is observed when the vehicle is in a neutral mode; and performing control driving when abnormal driving is performed in the step.
KR1020060087126A 2006-09-10 2006-09-10 Auto cruise control system for car to improve a fuel efficiency KR20080023284A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8996272B2 (en) 2008-12-03 2015-03-31 Electronics And Telecommunications Research Institute Cruise control system and method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8996272B2 (en) 2008-12-03 2015-03-31 Electronics And Telecommunications Research Institute Cruise control system and method thereof

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