KR101113638B1 - ECO driving guide method for hybrid vehicle - Google Patents

ECO driving guide method for hybrid vehicle Download PDF

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KR101113638B1
KR101113638B1 KR1020090119500A KR20090119500A KR101113638B1 KR 101113638 B1 KR101113638 B1 KR 101113638B1 KR 1020090119500 A KR1020090119500 A KR 1020090119500A KR 20090119500 A KR20090119500 A KR 20090119500A KR 101113638 B1 KR101113638 B1 KR 101113638B1
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South Korea
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driving
condition
economic
stage
signal
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KR1020090119500A
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Korean (ko)
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KR20110062701A (en
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최용각
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기아자동차주식회사
현대자동차주식회사
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/84—Data processing systems or methods, management, administration

Abstract

The present invention relates to a method of guiding economic driving of a hybrid vehicle, and more particularly, to inform a driver of an optimal economic driving situation for each driving condition of a hybrid vehicle, so as to induce driving that can pursue the best fuel economy. It relates to an economic driving guidance method of a hybrid vehicle.

To this end, the present invention in the situation that corresponds to the shift stage position, acceleration condition, deceleration condition, idle condition, idle-stop condition, creep driving condition, air conditioner on / off condition, fuel cut presence condition after the start-up of the hybrid vehicle In accordance with the vehicle speed signal, the deceleration signal, the brake pedal signal, and the APS signal, an economic driving guide value directed to an optimal driving point is output, so that segment display for cluster eco driving can be performed. Provide driving guidance.

Hybrid, Economic Driving, Guidance, Speed, Acceleration, Deceleration, Idle Stop, Cluster, Eco Driving, Segment

Description

Economic driving guide method for hybrid vehicle {ECO driving guide method for hybrid vehicle}

The present invention relates to a method of guiding economic driving of a hybrid vehicle, and more particularly, to inform a driver of an optimal economic driving situation for each driving condition of a hybrid vehicle, so as to induce driving that can pursue the best fuel economy. It relates to an economic driving guidance method of a hybrid vehicle.

The purpose of a hybrid vehicle or a pure electric vehicle is to realize a high efficiency vehicle by improving fuel efficiency, and to implement an eco-friendly vehicle by improving exhaust performance.

The main driving mode for improving fuel economy and exhaust of the hybrid vehicle is HEV driving mode which can save 30-40% fuel economy compared to the acceleration using only the engine through the power distribution of the engine and motor during acceleration. Idle stop mode to improve fuel efficiency by stopping the engine while idling the engine while stopping the engine, and recovering the braking and inertia energy of the vehicle by generating power from the motor while driving the vehicle by braking or inertia. There is a regenerative braking mode for charging, and a high efficiency low voltage DC-DC converter (LDC), which replaces an alternator, is applied to improve fuel efficiency.

While driving the hybrid vehicle performing the above functions for improving fuel economy and exhaust performance, it is desirable to inform the driver of the current driving situation corresponding to economic driving to guide the optimal fuel-saving driving state.

Therefore, the method of displaying the ECO display function, that is, the letter ECO in the cluster, among the economic driving guidance functions of the existing vehicle is known. This method is intended to show the optimum fuel efficiency driving point to the customer. By changing the color of the ECO letter according to the method to induce driving to the optimum fuel economy point.

The conventional economic driving guidance function is a passive type economic driving guidance function, which induces a customer to drive the vehicle in an optimal state, but the existing economic driving guidance function is an acceleration condition and a constant speed maintenance condition, namely There is a drawback of inducing economic driving only under the condition of stepping on the accelerator.

In other words, the economic driving guidance function in conventional vehicles such as gasoline and diesel vehicles is driven by the power of the engine, so it is implemented as a function that shows the fuel efficiency optimized driving point for acceleration and constant driving conditions. Hybrid Electric Vehicle (HEV) has the combined output value of the engine and motor and also the function of recovering the energy of the motor at the time of deceleration (regeneration). There is a problem that can not implement all of them.

Therefore, the economic driving guidance function of the hybrid vehicle is newly required under the following conditions.

1) acceleration condition

In a normal gasoline vehicle or the like, the vehicle accelerates only by the power of the engine, so that the economic driving status is determined based on a threshold value set based on the engine fuel consumption at the time of acceleration.

However, in the hybrid, the use condition of the motor is included, and the usage of the engine and the motor is changed even under the same acceleration condition according to the charging state of the main battery (high voltage battery). .

2) deceleration condition

Unlike general vehicles, hybrid vehicles can recover energy through the regenerative braking function, and the recovered energy is used again for acceleration and constant speed driving of the hybrid vehicle, which means an improvement in fuel efficiency. The maximum means more fuel economy.

Accordingly, in a hybrid vehicle, an economic driving guidance function with deceleration conditions that is not available in a general vehicle is required.

3) When ancillary factors such as air conditioner operation, fuel-cut, etc. occur in driving a vehicle, an economic driving guidance function displayed to improve fuel economy is required.

The present invention has been made in view of the above, and informs the driver of the optimal economic driving conditions for each driving condition of the hybrid vehicle, such as acceleration conditions and deceleration conditions, idle and idle stop conditions, and creep driving mode conditions. The purpose of the present invention is to provide an economic driving guidance method of a hybrid vehicle that can induce driving that can pursue the best fuel economy through control logic.

The present invention for achieving the above object is in the condition of the shift stage position, acceleration condition, deceleration condition, idle condition, idle-stop condition, creep driving condition, air conditioner on / off condition, fuel cut presence condition In this case, the economic driving guide value for the optimal driving point is output according to the vehicle speed signal, the deceleration signal, the brake pedal signal, and the APS signal, so that segment display for cluster echo driving can be performed. Provides an economic driving guide method for a hybrid vehicle.

Through the above problem solving means, the present invention provides the following effects.

According to the present invention, an idle stop or release for each driving condition of the hybrid vehicle according to various driving modes, shift speeds, acceleration and deceleration conditions, idle and idle stop conditions, creep driving mode conditions, and the like, By performing the air conditioner off, fuel cut, and the like, the driver can be informed of the optimal economic driving situation, thereby guiding the driver in pursuit of the best fuel economy.

As a result, according to the present invention, the fuel economy improvement according to the economic driving guide is added to the inherent fuel efficiency improvement of the hybrid vehicle, thereby maximizing the fuel economy improvement of the hybrid vehicle.

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

In order to help the understanding of the present invention, the powertrain and various controller connection configurations of the hybrid vehicle will be described with reference to FIG. 3.

In the powertrain of the hybrid electric vehicle, the engine 10 and the motor 12 are directly connected on one axis, connected to an axis extending from the motor 12, and the clutch 14 and the transmission 16 are continuously arranged. The output shaft of the transmission 14 has a structure connected to the wheel shaft 18 for driving.

As a motor drive and control system, a motor controller 22 (MCU) that uses an inverter, that is, a high voltage battery 24 that is a main battery, is connected to the motor 12, and 12V that supplies power to the electric load 30. The secondary battery 28 is connected to the high voltage battery 24 so as to be charged and discharged by the DC-DC converter 26.

In addition, the motor controller 22, the engine control engine controller 20 (ECU), the battery controller 32 (BMS) for overall management of the high voltage battery, and the transmission controller 34, which controls the transmission, TCU) and the hybrid controller 36 (HCU), which is the highest level controller of the hybrid vehicle, are interconnected by a can communication line.

The engine controller 20 controls general operations of the engine operation according to the vehicle driving request signal of the driver and engine state information such as coolant temperature and engine torque.

The transmission controller 34 detects information such as current vehicle speed, gear ratio, clutch state, and the like to control the overall operation of the output torque adjustment of the transmission 16 (CVT).

The high voltage battery 24 supplies a voltage so as to be started by a motor at initial startup, supports output power of the motor while driving, and recovers and regenerates regenerative braking energy of a motor operating as a generator during braking control. do.

The battery controller 32 comprehensively detects information such as voltage, current, and temperature of the high voltage battery, manages and controls the SOC state, and controls the output current amount when the motor power is supported.

The hybrid controller 36 collectively controls the respective controllers to control the overall behavior of the vehicle. The hybrid controller 36 controls the respective controllers as an upper controller, and whether the vehicle is in the mode of power generation control by the engine. By determining whether or not the regenerative braking power generation mode by the mode, and when the engine is in the idle power generation control mode, the voltage generated by the motor is controlled to charge the battery through an inverter or the like.

In addition, the hybrid controller 36 determines and controls the amount of increase and decrease of the generation torque in accordance with whether the air conditioning system is operated in the idle generation control mode, and promptly assists the acceleration of the vehicle when the driver's starting intention is detected. To release the generating torque.

Hereinafter, a method for guiding economic driving of a hybrid vehicle based on the above configuration will be described.

1 is a flowchart illustrating a method for guiding economic driving of a hybrid vehicle according to an exemplary embodiment of the present invention, and FIG. 2 is a schematic diagram illustrating a method of displaying a driving condition control and a corresponding echo driving state on a cluster.

Unlike conventional gasoline engine vehicles, the hybrid vehicle includes the conditions of use of the motor, and the usage of the engine and the motor changes under the same acceleration conditions according to the state of charge of the main battery (high voltage battery). Economic driving guidance function is needed, and energy driving guidance function is required for regenerative braking, and economic driving guidance function of deceleration condition which is not available in general vehicles is required. Also, it is necessary to drive the vehicle such as air conditioner operation and fuel cut. Economic operation guidance is required when incidental factors occur.

Accordingly, the present invention outputs the economic driving guide value according to the acceleration conditions, deceleration conditions, idle conditions, idle-stop conditions, creep driving conditions, etc. of the hybrid vehicle, to drive at the optimum driving point as shown in the cluster shown in FIG. In this case, the 12-segment segment for eco-driving is filled in sequence, or the segments are emptied in turn according to the rate of deviation from the optimum driving point, thereby visually indicating the driver's economic driving situation.

1) acceleration condition

The optimum operating point under the acceleration condition receives the input of the vehicle speed and the accelerator position sensor (APS) and outputs the economic driving guide value.In this case, the economic driving guide value is set differently in the D stage and the E stage L stage. The output will be corrected according to the situation.

2) deceleration condition

The deceleration conditions are not found in general vehicles, and are divided into the deceleration conditions when the brake is on and the coasting deceleration conditions, which are decelerations when the brakes and the APS are not pressed. (Fuel-Cut) divided into the presence or absence.

In the case of a fuel cut, the deceleration is performed without fuel injection, so the economic operation notation shows the best value, but the echo segment of the cluster is indicated (filled) only when the deceleration is small.

Deceleration, which is the most important factor, is displayed in several stages. In general, when the deceleration is low, the deceleration can be felt only by the energy recovery of the regenerative braking. In this case, mechanical braking (meaning a foot brake of a general vehicle) As it decelerates without, it absorbs maximum energy by regenerative braking.

3) Idle condition

The display varies depending on the air conditioner On / Off, and the fuel economy in the idle state is most adversely affected by the average fuel economy, and thus is displayed as a worse fuel economy (echo segment of the cluster is empty).

4) Idle-stop condition

As a step of improving fuel efficiency by preventing idling, as a best economic driving situation, a notation in which the cluster echo segment is filled is made.

5) Creep Driving Mode

As a low-speed driving condition without braking the APS, the cluster echo segment notation is set on the basis of the vehicle speed, and the economic driving segment, that is, the cluster echo segment notation, is displayed in a bad state while the fuel economy is not good.

Here, it will be described in more detail with reference to Figure 1 attached to the economic driving guide method of a hybrid vehicle according to the present invention.

After start-up, if the shift stage is the P / R stage, an economic operation guide value corresponding to the P / R stage is output (S101), and the notation for the cluster echo segment is made accordingly, and the N stage neutral in the P / R stage is performed. In operation S102, an economic operation guide value corresponding to the N stage is output (S102), and the marking of the cluster echo segment is performed accordingly.

After shifting from the neutral N stage to the shiftable stage, when the brake pedal is released (off) while the accelerator pedal signal is off (off), it is determined to be a creep running after stopping and creep driving is performed. The economic driving guide value corresponding to the output is output (S103), and the marking for the cluster echo segment corresponding thereto is performed.

After moving to the N stage which is neutral, if the vehicle speed is not maintained, the engine is in an idle stop state where the engine stops, and an economic driving guide value corresponding to the idle stop state is output (S104). Is done.

At this time, when the idle stop state is forcibly released, for example, when the gear is shifted from the N stage to the shiftable stage, the idle state or the driving is performed, the economic driving guide value corresponding to the moment of the idle stop forced release is output (S105). ), The corresponding cluster echo segment is written.

In addition, when the air conditioner is in the idle state and the air conditioner is ON, and when the air conditioner is the OFF state in the idle state, an economic operation guide value corresponding to each is outputted (S106, S107). The notation is made.

On the other hand, if the vehicle speed is greater than the creep traveling speed and the brake pedal is released (off) and the accelerator pedal signal is on (ON), acceleration conditions correspond to acceleration conditions, such as the D stage, the E stage, the E shift stage, and the L stage. It will be in the state which travels.

Therefore, the corresponding economic driving guide value is outputted in accordance with the vehicle speed signal and the accelerator pedal step signal of the APS at the D stage where the acceleration driving is performed, and the E stage and the E stage which are the echo shift stages (S108, S109, S110). The notation for cluster echo segments is made.

At this time, if the vehicle speed is greater than the creep traveling speed, and the brake pedal is released (off) and there is no accelerator pedal signal (OFF), it corresponds to a coasting deceleration condition that is a deceleration without brake and APS. In operation S111, an economic operation guide value corresponding to the coasting deceleration condition is output, and a marking for the cluster echo segment corresponding thereto is performed.

In addition, if the vehicle speed is greater than the creep traveling speed and the brake pedal is on (on) and the accelerator pedal signal is on (ON), an economic operation guide value corresponding to APS ON + Break ON is output (S112). The notation for the corresponding cluster echo segment is made.

On the other hand, if the vehicle speed is greater than the creep traveling speed, and the brake pedal is on (on) and there is no accelerator pedal signal (OFF), it corresponds to the fuel cut condition. The economic driving guide value corresponding to the deceleration situation is output (S114), and if the vehicle speed is decelerated even when the fuel cut is not made (S114), the notation of the cluster echo segment corresponding thereto is displayed. Is done.

In addition, when the deceleration is considered in the above-described economic operation guide value of step S114 and step S115, the economic operation guide value considering the deceleration is output (S116, S117), and the notation for the cluster echo segment corresponding thereto is made.

In this way, the optimal economic driving situation is considered to the driver through the cluster in consideration of various driving modes, shift stages, acceleration and deceleration conditions, idle and idle stop conditions, and creep driving mode conditions of the hybrid vehicle. By visually informing, the driver can be guided in driving for the best fuel economy.

1 is a flowchart illustrating an economic driving guide method of a hybrid vehicle according to the present invention;

FIG. 2 is a schematic diagram illustrating a method for displaying an economic driving guide of a hybrid vehicle according to an embodiment of the present invention, and a method for displaying driving conditions and displaying an echo driving state in a cluster; FIG.

3 is a configuration diagram illustrating a power train and various controller connection configurations of a hybrid vehicle.

<Explanation of symbols for the main parts of the drawings>

10 engine 12 motor

14; Clutch 16: Transmission

18: wheel axle 20: engine controller

22: motor controller 24; High voltage battery

26: DC-DC converter 28: 12V auxiliary battery

30: electric load 32: battery controller

34 transmission controller 36 hybrid controller

Claims (9)

delete After the start-up of the hybrid vehicle, the vehicle speed signal and the deceleration rate are applicable to the gear shift position, acceleration condition, deceleration condition, idle condition, idle stop condition, creep driving condition, air conditioner on / off condition, and fuel cut condition. According to the signal, the brake pedal signal, and the APS signal, the economic driving guide value for the optimal driving point is output, so that the segment display for the cluster echo driving can be made. After start-up, if the shift stage is P / R stage, the economic operation guide value for the P / R stage is output, and if it is moved from the P / R stage to the neutral N stage, the economic operation guide value for the N stage is output. An economic driving guide method for a hybrid vehicle, characterized in that. The method according to claim 2, When there is no accelerator pedal signal (off) and the brake pedal is released (off) when there is a vehicle speed, it is determined that the driving is creep, and an economic driving guide value for creep driving is output. How to guide economic driving of hybrid vehicles. The method according to claim 2, After the shifting stage is shifted to the N-stage, if the vehicle speedless state is maintained, the engine is in an idle stop state in which the engine is stopped, and an economic driving guide value corresponding to the idle stop state is output. . The method according to claim 4, A hybrid vehicle characterized in that different economic driving guidance values are output when the idle stop state is forcibly released, when the air conditioner is turned on while being idle, and when the air conditioner is turned off while being idle. How to guide economic driving. The method of claim 3, If the vehicle speed is greater than the creep traveling speed and the brake pedal is released (off) and the accelerator pedal signal is on (ON), it is determined as an acceleration condition in which one of the D stage, the E shift stage E, and the L stage is accelerated. The economic driving guidance method of the hybrid vehicle, characterized in that for outputting the corresponding economic driving guidance value according to the vehicle speed signal and the accelerator pedal step signal of the APS from one of the D stage, the E shift stage, the E-shift stage. The method of claim 3, If the vehicle speed is greater than the creep driving speed, the brake pedal is released (off), and the accelerator pedal signal is off (OFF), economic driving guidance for coasting deceleration conditions, which are decelerations without brake and APS Economic driving guidance method for a hybrid vehicle, characterized in that the output value. The method of claim 3, If the vehicle speed is greater than the creep driving speed, and the brake pedal is on (on) and the accelerator pedal signal is on (ON), the economic driving guidance value corresponding to APS ON + Break ON is output. How to guide economic driving. The method of claim 3, If the vehicle speed is greater than the creep traveling speed, the brake pedal is on (on) and there is no accelerator pedal signal (OFF), it is determined that the fuel cut condition is satisfied, and the economic driving guidance value is output according to the vehicle speed and deceleration. Economic driving guidance method for a hybrid vehicle, characterized in that the.
KR1020090119500A 2009-12-04 2009-12-04 ECO driving guide method for hybrid vehicle KR101113638B1 (en)

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KR101354287B1 (en) * 2011-12-16 2014-02-05 기아자동차주식회사 Forced charging system for electric vehicles and method thereof
KR101125679B1 (en) * 2011-12-30 2012-03-20 주식회사 허즈앤티 Apparatus and method for guide eco driving, and confirm fuel consumption
KR101558773B1 (en) 2014-05-22 2015-10-07 현대자동차주식회사 Method for displaying dirver's propensity
KR102507232B1 (en) * 2017-12-21 2023-03-07 현대자동차주식회사 Controlled method of damper pulley clutch for vehicles

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Publication number Priority date Publication date Assignee Title
KR20050059957A (en) * 2003-12-15 2005-06-21 주식회사 립싸이언텍 Hybrid driving control system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050059957A (en) * 2003-12-15 2005-06-21 주식회사 립싸이언텍 Hybrid driving control system

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