KR101886443B1 - Method for controlling coast driving at reduced driving speed and Storage medium thereof - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a running control method, and more particularly, to a method of controlling a running of a batter in deceleration running of an automobile.
According to the present invention, in the case of decelerating driving, the vehicle can be operated optimally on the fuel consumption side during the driving of the vehicle, resulting in an improvement in fuel economy.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method of controlling driving force during deceleration,

The present invention relates to a driving control method, and more particularly, to a method of controlling driving of a vehicle during deceleration of a vehicle and a storage medium storing the program code for executing the method.

In response to the era of high oil prices, automakers are introducing various controls such as energy recovery and fuel-cut during deceleration to improve fuel efficiency. Refers to a case in which the vehicle travels in a state in which the vehicle is driven in a non-accelerating manner, that is, in a state in which the driver does not press the accelerator pedal and the brake pedal. Generally, the vehicle decelerates when driving, and may not be according to the gradient.

However, existing vehicles were fuel-cut during driving. The engine and transmission remain connected to perform the fuel-cut. In this case, the deceleration of the vehicle increases, the vehicle decelerates, and the driver again travels to the engine and moves to the destination. A diagram showing this is shown in Fig.

Referring to FIG. 1, when the fuel cut-off is on, the fuel amount becomes Low and the vehicle speed is decreased. In addition, the mileage is rapidly reduced.

Therefore, the problem in energy regeneration when driving the vehicle is that the energy regeneration is large, the vehicle is decelerated, and the engine is driven again to the destination.

1. Korean Published Patent No. 10-2009-0061826 2. Korean Patent Publication No. 10-2007-0023125

It is an object of the present invention to provide a driving control method for a driving force during deceleration running with optimal fuel economy in terms of fuel economy and driving with improved fuel economy.

It is another object of the present invention to provide a storage medium for storing program codes for optimally operating in terms of fuel economy at the time of driving a horsepower and for executing a driving control method for driving at the time of deceleration driving with improved fuel economy.

In order to accomplish the above-mentioned object, the present invention provides a driving control method of a driving force during deceleration driving, which can be optimally operated in terms of fuel consumption in the case of driving the vehicle during the driving of the vehicle.

The vehicle speed control method comprising: a vehicle speed determining step of determining whether a vehicle speed is equal to or greater than a first set value;

Determining whether the vehicle is in a running state when the vehicle speed is greater than a first set value;

A driver driving habit deriving step of deriving driver driving habits using the driving distance as a result of determining the driving state as a result of the driving force;

Calculating a number of driving habits of the driver according to the derived driving habits;

A learning number determining step of determining whether the calculated learning number is equal to or greater than a second set value; A learning distance determination step of determining whether the travel distance is equal to or greater than a third set value if the learned number of times is equal to or greater than a second set value; And

And a driving force step of driving the vehicle in a neutral-end mode if the learning distance is determined to be a third predetermined value or more.

Further, the method may further include a re-driving determination step of determining whether the vehicle is in the neutral-end mode and re-driving during driving.

Further, in the re-running determination step, when the accelerator pedal is selected, it is determined that the vehicle is running again.

Also, the re-driving determination step may determine whether the vehicle is running again using navigation information, sensing information sensed by a separate sensor, and vehicle information including a map map.

The vehicle speed control step, the driving speed determination step, the learning frequency calculation step, and the learning distance determination step may include performing the general driving control if the vehicle speed is less than the first set value, the second set value, and the third set value, respectively .

Here, the learning distance may be calculated using an arithmetic calculation including a cumulative average.

The driver's driving habit may be derived by using the travel distance traveled without selecting the accelerator pedal or the brake pedal.

The neutral-stage mode may be characterized in that when the transmission gear lever is D, the gear is placed at a neutral position to shut off the power of the transmission and the engine and to travel.

At this time, in the driving determination step, it is determined whether or not the vehicle is traveling by using navigation information, sensing information sensed by a separate sensor, and vehicle information including a map map.

On the other hand, another embodiment of the present invention provides a storage medium storing the program code for executing the driving control method for the deceleration running.

According to the present invention, in the case of decelerating driving, the vehicle can be operated optimally on the fuel consumption side during the driving of the vehicle, resulting in an improvement in fuel economy.

In other words, the engine and the transmission are shut off when driving, and the engine is driven with minimal fuel. That is, since the vehicle travels in a neutral (N) mode at a specific distance, deceleration of the vehicle is not significant due to the separation of the engine and the transmission. Therefore, the inertia energy of the vehicle moves to the destination, and accumulating the fuel amount is advantageous in terms of fuel efficiency compared to the conventional fuel cut control.

1 is a graph showing an operating state such as a fuel cut, a fuel amount, a vehicle speed and a distance according to the prior art.
FIG. 2 is a graph showing operational states such as fuel cutoff, fuel amount, vehicle speed, and distance according to an embodiment of the present invention.
FIG. 3 is a flowchart illustrating a process of controlling the driving of the vehicle in the decelerated driving according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method of controlling a driving force during deceleration according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a graph showing operational states such as fuel cutoff, fuel amount, vehicle speed, and distance according to an embodiment of the present invention. Referring to FIG. 2, the fuel cut 210 is maintained in the off state, and the fuel amount 220 becomes low after a predetermined time.

Of course, from the point where the amount of fuel 220 becomes Low, the vehicle performs a driving force in the neutral (N) mode. At this time, the vehicle speed 230 decreases steadily. That is, the deceleration is reduced. Alternatively, the distance 240 is constantly increased. That is, it increases in equivalent speed.

FIG. 3 is a flowchart illustrating a process of controlling the driving of the vehicle in the decelerated driving according to an embodiment of the present invention. Referring to FIG. 3, it is determined whether the speed of the vehicle is equal to or greater than a first set value (step S300, S310, S320). In other words, the key is turned on, and when the vehicle starts running, it is determined whether the speed of the vehicle is equal to or greater than a predetermined value. In other words, this means that the vehicle will start learning if the vehicle speed is above a certain value.

If it is determined that the vehicle speed is equal to or greater than the first set value, it is determined whether the vehicle is in the driving state (step S330). In other words, it is the part to judge the driving force. The driving of the vehicle refers to the case where the driver travels without depressing the accelerator pedal and the brake of the vehicle.

Whether or not the vehicle is running can be determined by using information of navigation attached to the vehicle, sensing information sensed by a separate sensor, and vehicle information including a map map. Such navigation, sensors, and map maps are merely well-known technologies, so that the description of the detailed configuration will be omitted for the sake of clarity of the present invention.

As a result of the determination of the driving state of the vehicle, the driver's driving habits are derived by using the driving distance in the case of the driving of the vehicle, and the driving habits of the driving habits are calculated in accordance with the derived driving habits (step S340). The driver's driving habit means that the driving distance is learned using a distance (i.e., a learning distance) in which the accelerator pedal or the brake pedal is not selected.

Therefore, if the accelerator pedal and the brake pedal are not stepped on according to the analysis of the driving habits of the driver, it can be judged that the acceleration / deceleration driving is a relatively small driver.

Here, the learning distance can be calculated using an arithmetic calculation such as a cumulative average.

The derivation of the driving habit learning according to the driving habits is performed by using an ECU (Engine Control Unit), a VCU (Vehicle Control Unit), and an HCU (Hybrid Control Unit) configured for vehicle control.

Subsequently, step S340 is a step of learning the driving habits of the driver at the time of driving the vehicle with an electric power.

When the number of times of learning is calculated, it is determined whether the calculated number of times of learning is equal to or greater than a second set value (step S350). If it is determined that the number of times of learning is equal to or greater than the second set value, it is determined whether the travel distance is equal to or greater than a third set value (step S360).

If it is determined that the learned distance is equal to or greater than the third set value, the vehicle is driven in the neutral-end mode (step S370). Here, the neutral (N) -stage mode means that when the transmission gear lever is D, the gear is placed at a neutral position to shut off the power of the transmission and the engine.

Alternatively, in the step S320 of determining the vehicle speed, the step S330 of judging the running of the horsepower, the step S350 of judging the number of times of learning, and the step of determining the learning distance, the first set value, the second set value and the third set value The vehicle performs normal travel control (step S323).

After the step S370, it is determined whether the vehicle is in the neutral-end mode or not during the driving of the vehicle (step S380). In other words, it is judged whether or not there is a running by the driver's will. That is, when the driver depresses the accelerator pedal, it can be determined that the vehicle is running again.

It is also possible to judge whether the vehicle is running again by using navigation information, sensing information sensed by a separate sensor, and vehicle information including a map map.

If it is determined in step S380 that there is a re-running, steps S320 to S370 are repeatedly performed.

If it is determined in step S380 that there is no re-running, it is checked whether the start of the vehicle is turned off (step S390). As a result of confirmation, the process is terminated when the start is off.

On the other hand, if it is determined that the starting is not turned off, steps S320 to S370 are repeatedly performed.

In addition, the deceleration driving control method according to an embodiment of the present invention may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination.

The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software.

Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like.

The medium may be a transmission medium such as an optical or metal line, a wave guide, or the like, including a carrier wave for transmitting a signal designating a program command, a data structure, or the like.

Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

In addition, one embodiment of the present invention may be implemented in hardware, software, or a combination thereof. (DSP), a programmable logic device (PLD), a field programmable gate array (FPGA), a processor, a controller, a microprocessor, and the like, which are designed to perform the above- , Other electronic units, or a combination thereof.

In a software implementation, it may be implemented as a module that performs the functions described above. The software may be stored in a memory unit and executed by a processor. The memory unit or processor may employ various means well known to those skilled in the art.

As described above, the present invention has been described with reference to particular embodiments, such as specific elements, and specific embodiments and drawings. However, it should be understood that the present invention is not limited to the above- And various modifications and changes may be made thereto by those skilled in the art to which the present invention pertains.

It is therefore to be understood that within the scope of the appended claims all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the appended claims and their equivalents. will be.

210: Fuel-Cut
220: fuel amount
230: Vehicle speed
240: Distance

Claims (10)

A vehicle speed determining step of determining whether a vehicle speed is equal to or greater than a first set value;
Determining whether the vehicle is in a running state when the vehicle speed is greater than a first set value;
A driver driving habit deriving step of deriving driver driving habits using the driving distance as a result of determining the driving state as a result of the driving force;
Calculating a number of driving habits of the driver according to the derived driving habits;
A learning number determining step of determining whether the calculated learning number is equal to or greater than a second set value;
A learning distance determination step of determining whether the travel distance is equal to or greater than a third set value if the learned number of times is equal to or greater than a second set value; And
A step of driving the vehicle in a neutral-end mode when the learning distance is determined to be a third set value or more;
Wherein the deceleration control means decelerates the deceleration.
The method according to claim 1,
Further comprising a re-driving determining step of determining whether the vehicle is in the neutral-end mode during the driving of the vehicle during the driving of the vehicle. 3. The method of claim 2,
Wherein when the accelerator pedal is selected, the re-driving determination step determines that the vehicle is running again.
3. The method of claim 2,
Wherein the re-driving determination step determines whether the vehicle is re-driving by using navigation information, sensing information sensed by a separate sensor, and vehicle information including a map map.
The method according to claim 1,
The vehicle speed determination step, the driving force determination step, the learning frequency calculation step, and the learning distance determination step may include performing a general travel control if the first set value, the second set value, and the third set value are equal to or less than the first set value, Wherein the deceleration control means decelerates the deceleration.
The method according to claim 1,
Wherein the learning distance is calculated using an arithmetic calculation including a cumulative average.
The method according to claim 1,
Wherein the driver's driving habit is derived using the travel distance traveled in a state where the accelerator pedal or the brake pedal is not selected.
The method according to claim 1,
Wherein the neutral stage mode is a mode in which the gear is set at a neutral stage when the gear lever of the transmission is single, and the power of the transmission and the engine is interrupted to drive.
The method according to claim 1,
Wherein the driving state determination step determines whether or not the vehicle is traveling by using navigation information, sensing information sensed by a separate sensor, and vehicle information including a map map. 10. A storage medium storing program code for executing a driving control method for a deceleration running according to any one of claims 1 to 9.

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