KR102539294B1 - Apparatus and method for controlling regenerative braking in coasting of hybrid vehicle - Google Patents

Abstract

An apparatus and method for controlling regenerative braking during coasting of a hybrid vehicle are provided. The apparatus for controlling regenerative braking during coasting of a hybrid vehicle according to an embodiment of the present invention collects vehicle information of a vehicle in motion, traffic information including geographic information, battery information, and BSG (Belt driven Starter Generator) state information. wealth; a regenerative braking determination unit that determines whether deceleration is necessary during coasting based on vehicle information and traffic information, and determines whether regenerative braking is possible based on vehicle information, battery information, and BSG state information; and a regenerative braking execution unit that performs regenerative braking according to the determination result and controls to return to coasting after regenerative braking ends.

Description

Apparatus and method for controlling regenerative braking in coasting of hybrid vehicle

The present invention relates to a hybrid vehicle, and more particularly, to a control device for regenerative braking during coasting of a hybrid vehicle capable of actively switching to a regenerative braking mode by determining when deceleration is necessary using geographic information or traffic information during coasting, and the same It's about how.

In general, coasting is a function of cruising by using the current inertia of a vehicle in a section where the driver has no will to accelerate while driving, and uses a small amount of fuel to disconnect the clutch and keep the engine idle method, and a method using fuel cut and engine brake.

On the other hand, hybrid vehicles are in the spotlight as next-generation vehicles because they are excellent in improving fuel efficiency and reducing exhaust gas emissions by recharging batteries by recovering energy through coasting or regenerative braking. Here, the regenerative braking is a function of reducing the driving speed of the vehicle by generating reverse torque from the motor to weaken the force propelling the vehicle.

However, since the conventional hybrid vehicle determines when braking is necessary only according to the driver's will to accelerate or decelerate, the entry point of regenerative braking is delayed, which acts as a disadvantage in terms of energy efficiency. In the case of careless braking, there is a problem that adversely affects stability as well as energy efficiency due to regenerative braking as sudden braking is performed because proper braking is not performed.

KR 10-1448755 B

In order to solve the problems of the prior art as described above, an embodiment of the present invention is a hybrid vehicle capable of improving energy efficiency by actively performing regenerative braking according to a point in time when deceleration is required using geographic information or traffic information during coasting. An apparatus and method for controlling regenerative braking during coasting of a vehicle are provided.

According to one aspect of the present invention for solving the above problems, an information collection unit for collecting vehicle information, traffic information including geographic information, battery information and BSG (Belt driven Starter Generator) state information of a vehicle in motion; Regeneration for determining whether deceleration is necessary during coasting based on the vehicle information and the traffic information, and determining whether regenerative braking is possible based on the vehicle information, the battery information, and the BSG state information brake determination unit; and a regenerative braking execution unit that performs regenerative braking according to the determination result and controls to return to coasting after regenerative braking ends.

In one embodiment, the regenerative braking determining unit, when the vehicle is traveling at a vehicle speed of a certain speed or more and there is no input of an accelerator or deceleration pedal, any one of a downhill road ahead, a prescribed speed exceeded, a traffic light present, and an inter-vehicle distance less than a certain value In the case of one, it can be determined that deceleration is necessary.

In one embodiment, the regenerative braking determination unit may determine that regenerative braking is possible when the state of charge (SOC) of the battery is not good and the temperatures of the BSG and the inverter are below a predetermined value.

In one embodiment, when the regenerative braking determination unit determines that the regenerative braking is not possible, it may control a deceleration request to alarm.

In one embodiment, the regenerative braking execution unit calculates the braking force due to the regenerative braking, and controls an additional deceleration request to be alarmed when the braking force is insufficient.

In one embodiment, the control device for regenerative braking during coasting of the hybrid vehicle may further include an alarm unit indicating that the vehicle is currently under regenerative braking.

In one embodiment, the information collection unit, traffic information collection unit for collecting traffic light information, speed enforcement information, traffic situation information, and inter-vehicle distance information based on GPS information; a vehicle information collection unit that collects the vehicle temperature, vehicle speed, acceleration or deceleration pedal amount, and whether or not the vehicle enters a downhill road; a battery information collection unit that collects state of charge (SOC) and temperature of the high voltage battery and the low voltage battery; and a BSG state information collection unit that collects the temperature and operation mode of the BSG.

According to another aspect of the present invention, determining whether the vehicle is coasting; determining whether deceleration is necessary based on vehicle information and traffic information; if deceleration is required, determining whether regenerative braking is possible based on the vehicle information, battery information, and BSG state information; performing regenerative braking if entry of regenerative braking is possible; and returning to coasting after regenerative braking ends; a method for controlling regenerative braking during coasting of a hybrid vehicle is provided.

In one embodiment, the step of determining whether deceleration is necessary may determine that deceleration is necessary if there is any one of a downhill road ahead, exceeding a prescribed speed, a traffic light, and an inter-vehicle distance equal to or less than a predetermined value.

In an embodiment, in the step of determining whether entry is possible, it may be determined that regenerative braking is not possible when the state of charge (SOC) of the battery is not good and the temperatures of the BSG and the inverter are below a predetermined value.

In one embodiment, the control method of regenerative braking during coasting of the hybrid vehicle may further include notifying a deceleration request when it is determined that the regenerative braking is not possible.

In one embodiment, the performing may include calculating the braking force by the regenerative braking and notifying an additional deceleration request when the braking force is insufficient.

In one embodiment, the performing may include notifying that the vehicle is currently under regenerative braking.

In one embodiment, the traffic information includes traffic light information, speed enforcement information, traffic situation information, and inter-vehicle distance information based on GPS information, and the vehicle information includes temperature of the vehicle, vehicle speed, acceleration or deceleration pedal amount, and whether or not to enter a downhill road, the battery information may include state of charge (SOC) and temperature of the high voltage battery and the low voltage battery, and the BSG state information may include the temperature and operation mode of the BSG.

An apparatus and method for controlling regenerative braking during coasting of a hybrid vehicle according to an embodiment of the present invention determines when deceleration is necessary during coasting and actively switches to the regenerative braking mode, thereby improving energy efficiency and thus economic feasibility of the vehicle. can improve

In addition, the present invention can reduce the frequency of using the brake pedal by actively performing regenerative braking according to the time when deceleration is required, thereby improving the convenience of maintenance of the vehicle by extending the replacement cycle of parts.

In addition, the present invention can maintain smooth driving even when the user is careless by determining when to decelerate using geographic information or traffic information, thereby improving user convenience.

1 is a schematic configuration diagram of a hybrid vehicle according to an embodiment of the present invention.
2 is a block diagram of an apparatus for controlling regenerative braking during coasting of a hybrid vehicle according to an embodiment of the present invention.
3 is a flowchart of a method of controlling regenerative braking during coasting of a hybrid vehicle according to an embodiment of the present invention.
4 is a flowchart illustrating an example of determining whether or not to decelerate in FIG. 3 .
5 is a flowchart illustrating another example of determining whether or not to decelerate in FIG. 3 .

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. This invention may be embodied in many different forms and is not limited to the embodiments set forth herein. In order to clearly describe the present invention in the drawings, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

Hereinafter, an apparatus for controlling regenerative braking during coasting of a hybrid vehicle according to an embodiment of the present invention will be described in more detail with reference to the drawings. 1 is a schematic configuration diagram of a hybrid vehicle according to an embodiment of the present invention.

Referring to FIG. 1 , a hybrid vehicle 10 according to an embodiment of the present invention includes a BSG 11, an electronic control unit 12, an inverter 13, a high voltage battery 14, a converter 15, and a low voltage A battery 16 may be included.

The hybrid vehicle 10 may be a BSG system in which an engine and a motor-generator are interlocked through a belt, or may be a mild hybrid system using a 48V battery as a high-voltage battery.

The BSG 11 interlocks with the engine through a belt and can function as a start motor and a generator capable of generating AC voltage. Specifically, when the BSG 11 functions as a start motor, it receives a driving voltage through the inverter 13 and serves as an auxiliary engine power. 14) can be supplied and charged.

The electronic control unit 12 controls each component and may include a control unit 120 of the regenerative braking control device 100 during coasting as will be described later.

The electronic control unit 12 can accurately determine the time to decelerate ahead of the driver's decision by using traffic light information, traffic information, speed camera information, and GPS information, and therefore, ahead of the driver's will. Actively using regenerative braking to reduce the speed of the vehicle, it can be controlled to store energy.

The inverter 13 is a bi-directional converter that converts alternating current to direct current or direct current to alternating current, and converts electrical energy supplied from the high voltage battery 14 and supplies it to the BSG 11, or electrical energy generated from the BSG 11 may be converted and supplied to the high voltage battery 14 to be charged.

The high voltage battery 14 is composed of a plurality of supercapacitors, and is charged with electrical energy regenerated from the BSG 11 when the vehicle decelerates, and the electrical energy charged by the BSG 11 to assist engine torque when the vehicle accelerates. can supply In one example, this high voltage battery 14 may be a 48V battery.

The converter 15 is a DC-DC converter that converts the level of direct current, and converts the output of the inverter 13 when power generation is performed or the voltage of the high voltage battery 14 when power generation is not performed to convert the low voltage battery 16 It can be charged by supplying or supplied by electric load.

The low-voltage battery 16 is charged by supplying electrical energy converted by the converter 15 and supplies the charged power to the electric load of the hybrid vehicle 10 . In one example, this low voltage battery 16 may be a 12V battery.

2 is a block diagram of an apparatus for controlling regenerative braking during coasting of a hybrid vehicle according to an embodiment of the present invention.

The device 100 for controlling regenerative braking during coasting may include an information collection unit 110, a control unit 120, and an alarm unit 130.

The information collection unit 110 collects vehicle information of a vehicle in motion, traffic information including geographical information, battery information, and BSG status information, and the traffic information collection unit 112, vehicle information collection unit 114, and battery information A collection unit 116 and a BSG status information collection unit 118 may be included.

The traffic information collection unit 112 may collect traffic light information, speed enforcement information, traffic condition information, and inter-vehicle distance information based on GPS information. The traffic information collection unit 112 may include a GPS receiver, a navigation information receiver, a sensor, and a camera.

The vehicle information collection unit 114 may collect vehicle temperature, vehicle speed, acceleration or deceleration pedal amount, and whether or not the vehicle enters a downhill road. The vehicle information collection unit 114 may include a temperature sensor, a vehicle speed sensor, an accelerator position sensor (APS), a brake pedal position sensor, and an inclination sensor.

The battery information collection unit 116 may collect state of charge (SOC) and temperatures of the high voltage battery 14 and the low voltage battery 16 . The battery information collection unit 116 may include an Intelligent Battery Sensor (IBS) sensor.

The BSG status information collection unit 118 may collect the temperature and operation mode of the BSG 11. The BSG status information collection unit 118 may include a temperature sensor and a current sensor.

The control unit 120 may determine whether to decelerate and whether to perform regenerative braking based on the information collected by the information collection unit 110 and control regenerative braking to be performed. The control unit 120 may include a regenerative braking determining unit 122 and a regenerative braking executing unit 124 .

The regenerative braking determination unit 122 may determine whether deceleration is necessary during coasting based on vehicle information and traffic information. For example, the regenerative braking determination unit 122 determines whether there is no input of an accelerator or deceleration pedal while the hybrid vehicle 10 is traveling at a vehicle speed of a certain speed or more, and if there is no input of either the accelerator or decelerator pedal, the driver has no intention of accelerating or decelerating. It can be judged by coasting without it.

In addition, the regenerative braking determination unit 122 may determine that deceleration is necessary according to whether a downhill road ahead during coasting, exceeding a prescribed speed, a traffic light, and an inter-vehicle distance is equal to or less than a predetermined value.

That is, the regenerative braking determination unit 122 determines that deceleration is necessary if there is an obstacle to driving at the current speed ahead based on the GPS information, traffic light information, traffic situation information, and inter-vehicle distance information of the traffic information collection unit 112. can judge

In addition, the regenerative braking determination unit 122 may determine that deceleration is necessary if there is a downhill road ahead, based on sensor information of the vehicle information collection unit 114 and a downhill determination algorithm based thereon.

Here, the regenerative braking determining unit 122 may not immediately decelerate even if there is a downhill road, and as described above, may finally determine whether or not deceleration is necessary depending on whether an obstacle exists in front.

In addition, the regenerative braking determination unit 122 may recognize a speed enforcement camera ahead from the traffic information collection unit 112 and determine that deceleration is necessary if the current speed exceeds the regulation speed.

The regenerative braking determination unit 122 may determine whether or not deceleration is no longer necessary even when the regenerative braking is switched during coasting. That is, the regenerative braking determiner 122 may determine whether deceleration is necessary based on various information obtained from the information collection unit 110 as described above even when regenerative braking is performed in the same manner as during coasting.

In addition, the regenerative braking determining unit 122 may determine whether regenerative braking is possible based on vehicle information, battery information, and BSG state information. Here, regenerative braking is for recovering energy by converting kinetic energy into electrical energy during braking of the vehicle, but the state of charge (SOC) of the battery for storing the converted energy and the BSG (11) and inverter used for regenerative braking Since it can be limited according to the state of (13), if deceleration is necessary, first, it is determined whether regenerative braking can be entered.

For example, the regenerative braking determination unit 122 determines that the SOC of the battery is not good by the battery information collection unit 116, and the BSG 11 and the inverter 13 by the vehicle information collection unit 114. When the temperature of is below a certain value, it may be determined that regenerative braking is possible.

Contrary to this, the regenerative braking determining unit 122 determines whether the battery's state of charge (SOC) is good or the temperature of the BSG 11 and the inverter 13 is above a certain value by the vehicle information collection unit 114, so that regenerative braking is not performed. If it is determined that it is not possible, the user can control the deceleration request to be alarmed so that the user can intentionally perform the deceleration.

Alternatively, when the hybrid vehicle 10 is equipped with an autonomous driving mode, the regenerative braking determining unit 122 may transmit a deceleration request to a mechanical braking device to actively perform braking regardless of the user's will. .

The regenerative braking execution unit 124 may control regenerative braking to be performed when the regenerative braking determination unit 122 determines that deceleration is necessary and regenerative braking is possible. That is, the regenerative braking execution unit 124 may control the BSG 11 to generate reverse torque to perform regenerative braking.

In addition, the regenerative braking execution unit 124 may control the hybrid vehicle 10 to indicate that it is currently performing regenerative braking. That is, the regenerative braking execution unit 124 may control regenerative braking state information to be output to the alarm unit 130 so that the user can recognize that regenerative braking is in progress.

In addition, the regenerative braking execution unit 124 calculates the braking force by regenerative braking in consideration of the operating state of the BSG 11 and the current shift stage, and when the braking force necessary for deceleration to the proper vehicle speed is insufficient, an additional deceleration request is alarmed. You can control it. For example, the regenerative braking execution unit 124 may control an additional deceleration request to be alarmed through the alarm unit 130 so that the user can intentionally decelerate.

Alternatively, when the hybrid vehicle 10 is equipped with an autonomous driving mode, the regenerative braking execution unit 124 may transmit an additional deceleration request to the mechanical braking device in order to actively perform additional braking.

Meanwhile, when it is determined that deceleration is not necessary while performing regenerative braking, the regenerative braking execution unit 124 may control regenerative braking to end and return to coasting. That is, the regenerative braking execution unit 124 may control to return to the previous driving state, coasting, when the obstacle to vehicle progress is resolved.

With such a configuration, the regenerative braking control device 100 during coasting can improve energy efficiency, thus improving the economics of the vehicle, and reducing the frequency of use of the brake pedal, thereby extending the replacement cycle of parts to the vehicle Convenience of maintenance can be improved, and since smooth driving can be maintained even when the user is careless, user convenience can be improved.

Hereinafter, a method of controlling regenerative braking during coasting of a hybrid vehicle according to the present invention will be described with reference to FIGS. 3 to 5 . 3 is a flowchart of a method for controlling regenerative braking during coasting of a hybrid vehicle according to an embodiment of the present invention, FIG. 4 is a flowchart showing an example of determining whether to decelerate in FIG. 3, and FIG. 5 is decelerating in FIG. 3 It is a flowchart showing another example of determining whether or not.

The method 300 for controlling regenerative braking during coasting of a hybrid vehicle includes the steps of determining coasting (S310 and S320), determining whether deceleration is necessary (S330), determining whether regenerative braking is possible (S340), It includes performing regenerative braking (S350 to S380), and returning to coasting (S390).

More specifically, as shown in FIG. 3, first, it is determined whether the vehicle speed is equal to or higher than a predetermined speed (step S310), and, for example, when it is determined that the vehicle speed is 20 km/h or less, when the vehicle speed is equal to or higher than a predetermined speed can wait until

As a result of the determination in step S310, when it is determined that the vehicle speed is equal to or higher than a predetermined speed, it may be determined whether the vehicle is coasting (step S320). That is, it is possible to determine whether coasting without the driver's will is determined according to whether there is an input of an accelerator or deceleration pedal.

At this time, if it is determined that there is an input of either the accelerator or decelerator pedal, that is, if the driver intentionally accelerates or decelerates the vehicle by using the accelerator or decelerator pedal, it may be determined that coasting is not in progress, and the process returns to step S310. Thus, it can wait until coasting is performed.

As a result of the determination in step S320, when it is determined that there is no input of both the accelerator and the accelerator pedal, that is, when it is determined that the driving is coasting, it is possible to determine whether deceleration is necessary based on vehicle information and traffic information (step S330). That is, whether or not to decelerate may be determined according to whether or not there are obstacles to vehicle progress on the driving route according to vehicle information and traffic information.

At this time, when it is determined that deceleration is not necessary, that is, when it is determined that there are no obstacles to the vehicle's progress on the driving route, it is possible to return to step S310 and continue coasting until it is determined that deceleration is necessary.

As a result of the determination in step S330, if it is determined that there is an obstacle to the vehicle's progress on the driving route, that is, if there is a downhill road ahead, the speed limit is exceeded, there is a traffic light, and the distance between vehicles is less than or equal to a certain value, deceleration is performed. may be judged necessary.

For example, it may be determined that deceleration is necessary if there is an obstacle to driving the vehicle at the current speed ahead based on GPS information, traffic light information, traffic condition information, and inter-vehicle distance information.

In addition, as shown in FIG. 4 , it is determined whether there is a downhill road ahead by the sensor information of the vehicle information collection unit 114 and the downhill road determination algorithm therein (step S410), and when it is determined that there is no downhill road, the deceleration is It is determined that it is not necessary and may return to step S310.

As a result of the determination in step S410, when it is determined that there is a downhill road ahead, it is determined whether or not there are obstacles to driving at the current speed on the path as described above (step S420), and there are obstacles ahead. If it is determined that it does not, that is, if there is no traffic light in front, if the current vehicle speed does not exceed the regulated speed, or if a sufficient inter-vehicle distance can be secured, it is determined that deceleration is not necessary and returns to step S310. .

As a result of the determination in step S420, when it is determined that there is an obstacle ahead, that is, when there is a traffic light ahead, when the current vehicle speed exceeds the regulated speed, or when a sufficient distance between vehicles may not be secured, it is determined that deceleration is necessary. It can be done, and it can proceed to step S340.

In addition, as shown in FIG. 5, the traffic information collection unit 112 determines whether there is a speed enforcement camera in front (step S510), and if it is determined that there is no speed enforcement camera, it is possible to return to step S310. .

As a result of the determination in step S510, if it is determined that there is a speed enforcement camera in front, it is determined whether the current vehicle speed exceeds the regulation speed (step S520), and if it does not exceed the regulation speed, it is determined that deceleration is not necessary Thus, it is possible to return to step S310.

As a result of the determination in step S520, if it is determined that the current vehicle speed exceeds the specified speed, it may be determined that deceleration is necessary, and the process may proceed to step S340.

Determination of whether or not such deceleration is necessary may be made simultaneously by considering all of the various situations as described above.

Next, when it is determined that deceleration is necessary as described above, it is possible to determine whether regenerative braking can be performed based on vehicle information, battery information, and BSG state information (step S340). That is, the entry of regenerative braking depends on whether the state of charge (SOC) of the battery is sufficient to store the energy converted by regenerative braking or whether the states of the BSG 11 and the inverter 13 are suitable for performing regenerative braking. You can judge whether it is possible or not.

As a result of the determination in step S340, when it is determined that regenerative braking is possible, that is, when the state of charge (SOC) of the battery is not good and the temperatures of the BSG and inverter are below a certain value, regenerative braking can be performed by entering regenerative braking. Yes (step S350). At this time, the battery may be charged by recovering energy generated by the BSG 11 while reducing the current vehicle speed by generating reverse torque in the BSG 11 .

Next, it may indicate that the hybrid vehicle 10 is currently under regenerative braking, or an additional deceleration request may be alarmed (step S360). For example, as in step S350, an output can be made through the alarm unit 130 so that the user can recognize that the hybrid vehicle 10 is in regenerative braking.

At this time, the braking force by regenerative braking is calculated in consideration of the operating state of the BSG 11 and the current shift stage, and when the braking force required for deceleration to the proper vehicle speed is insufficient, an additional deceleration request may be alarmed. For example, an additional deceleration request may be alarmed through the alarm unit 130 so that the user can intentionally decelerate.

Alternatively, when the hybrid vehicle 10 is equipped with an autonomous driving mode, an additional deceleration request may be transmitted to the mechanical braking device to actively perform additional braking regardless of the user's will.

As a result of the determination in step S340, when it is determined that regenerative braking is not possible, that is, when the state of charge (SOC) of the battery is good or the temperature of the BSG and the inverter is above a certain value, an alarm for deceleration request can be issued (step S370) , and returns to step S310 to continuously perform coasting until it is determined that regenerative braking is possible.

In this case, deceleration is necessary due to an obstacle to the progress of the vehicle ahead, but regenerative braking is not possible. Therefore, a deceleration request may be alarmed so that the user can intentionally decelerate.

Alternatively, when the hybrid vehicle 10 is equipped with an autonomous driving mode, a deceleration request may be transmitted to a mechanical braking device to actively perform braking regardless of a user's will.

Meanwhile, it is determined whether deceleration is continuously required during regenerative braking as in step S360 (step S380), and when it is determined that deceleration is necessary, regenerative braking may be continuously performed until deceleration is not required.

As a result of the determination in step S380, when it is determined that deceleration is not necessary, that is, when it is determined that an obstacle in the front has been eliminated, regenerative braking may be terminated and coasting may be resumed (step S390).

In other words, if a sufficient distance between the vehicle and the vehicle in front can be secured, the vehicle speed does not exceed the speed limit, a traffic light or speed camera is passed, or an obstacle to the vehicle's progress is resolved by passing a downhill road, hybrid It is possible to return to coasting, which is the previous running state of the vehicle 10 .

Since energy efficiency can be improved by this method, the economic feasibility of the vehicle can be improved, and since the frequency of use of the brake pedal can be reduced, the replacement cycle of parts can be extended to improve the convenience of vehicle maintenance. Since smooth driving can be maintained even when the user is careless, user convenience can be improved.

The above methods can be implemented by the electronic control unit 12 as shown in FIG. 1 and the control unit 120 of the control device 100 for regenerative braking during coasting as shown in FIG. 2, in particular, It may be implemented as a software program that performs these steps, and in this case, these programs may be stored in a computer readable recording medium or transmitted by a computer data signal combined with a carrier wave in a transmission medium or a communication network.

At this time, the computer-readable recording medium includes all types of recording devices in which data readable by a computer system is stored, and includes, for example, ROM, RAM, CD-ROM, DVD-ROM, DVD-RAM, and magnetic tape. , a floppy disk, a hard disk, an optical data storage device, and the like.

Although one embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiments presented herein, and those skilled in the art who understand the spirit of the present invention may add elements within the scope of the same spirit. However, other embodiments can be easily proposed by means of changes, deletions, additions, etc., but these will also fall within the scope of the present invention.

10: hybrid vehicle 11: BSG
12: electronic control unit 13: inverter
14: high voltage battery 15: converter
16: low voltage battery
100: Control device for regenerative braking during coasting
110: information collection unit 112: traffic information collection unit
114: vehicle information collection unit 116: battery information collection unit
118: BSG status information collection unit 120: control unit
122: regenerative braking determination unit 124: regenerative braking execution unit
130: alarm unit

Claims (14)

an information collection unit that collects vehicle information of a vehicle in motion, traffic information including geographic information, battery information, and BSG (Belt driven Starter Generator) state information;
Regeneration for determining whether deceleration is necessary during coasting based on the vehicle information and the traffic information, and determining whether regenerative braking is possible based on the vehicle information, the battery information, and the BSG state information brake determination unit; and
A regenerative braking execution unit that performs regenerative braking according to the determination result and controls to return to coasting after regenerative braking ends;
The regenerative braking execution unit
The braking force by the regenerative braking is calculated in consideration of the operating state of the BSG and the current shift stage, and when the braking force is insufficient, an additional deceleration request is controlled to alarm.
A control device for regenerative braking during coasting of a hybrid vehicle. According to claim 1,
The regenerative braking determination unit decelerates when the vehicle is traveling at a vehicle speed of a certain speed or higher and there is no input of an accelerator or deceleration pedal, if there is any one of a downhill road ahead, exceeding a prescribed speed, a traffic light, and an inter-vehicle distance less than a certain value A control device for regenerative braking during coasting of a hybrid vehicle that determines that According to claim 1,
The regenerative braking determination unit determines that regenerative braking is possible when the state of charge (SOC) of the battery is not good and the temperatures of the BSG and the inverter are below a predetermined value. According to claim 1,
Wherein the regenerative braking determination unit determines that the regenerative braking is not possible, the control device of regenerative braking during coasting of the hybrid vehicle controls to alarm a deceleration request. delete According to claim 1,
The apparatus for controlling regenerative braking during coasting of a hybrid vehicle further comprising an alarm unit indicating that the vehicle is currently under regenerative braking. According to claim 1,
The information collection unit,
a traffic information collection unit that collects traffic light information, speed enforcement information, traffic situation information, and inter-vehicle distance information based on GPS information;
a vehicle information collection unit that collects the vehicle temperature, vehicle speed, acceleration or deceleration pedal amount, and whether or not the vehicle enters a downhill road;
a battery information collection unit that collects state of charge (SOC) and temperature of the high voltage battery and the low voltage battery; and
BSG state information collection unit for collecting temperature and operation mode of BSG;
A control device for regenerative braking during coasting of a hybrid vehicle comprising a. determining whether the running vehicle is coasting;
determining whether deceleration is necessary based on vehicle information and traffic information;
if deceleration is required, determining whether regenerative braking is possible based on the vehicle information, battery information, and BSG state information;
performing regenerative braking if entry of regenerative braking is possible; and
Including; returning to coasting after the end of regenerative braking;
The step of performing the regenerative braking
Calculating the braking force by the regenerative braking in consideration of the operating state of the BSG and the current shift stage, and alarming an additional deceleration request when the braking force is insufficient
Control method of regenerative braking during coasting of hybrid vehicle. According to claim 8,
The step of determining whether or not deceleration is necessary may include regenerative braking during coasting of the hybrid vehicle, which determines that deceleration is necessary when there is a downhill road ahead, a speed exceeding a prescribed speed, a traffic light, and an inter-vehicle distance below a predetermined value. control method. According to claim 8,
In the step of determining whether entry is possible, it is determined that regenerative braking is possible when the state of charge (SOC) of the battery is not good and the temperatures of the BSG and the inverter are below a predetermined value. According to claim 8,
When it is determined that the regenerative braking is not possible, the control method of regenerative braking during coasting of the hybrid vehicle further comprising the step of alarming a deceleration request. delete According to claim 8,
The performing of the method includes notifying that the vehicle is currently performing regenerative braking. According to claim 8,
The traffic information includes traffic light information, speed enforcement information, traffic situation information, and distance between vehicles based on GPS information, and the vehicle information includes the temperature of the vehicle, vehicle speed, accelerator or deceleration pedal amount, and whether or not the vehicle is entering a downhill road. wherein the battery information includes states of charge (SOC) and temperatures of the high voltage battery and the low voltage battery, and the BSG state information includes the temperature and operation mode of the BSG.

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