KR20090118352A - Apparatus for controlling hybrid vehicle according to road condition - Google Patents

Abstract

PURPOSE: An apparatus for controlling hybrid vehicle according to road condition is provided to prevent unnecessary fuel consumption and discharging of exhaust gas. CONSTITUTION: An apparatus for controlling hybrid vehicle according to road condition comprises an acceleration pedal sensor(13), ISG(15), motor controller and motor(17), hybrid control unit(11), and road condition sensor(21). The apparatus for controlling hybrid vehicle controls a vehicle based on battery information, acceleration will information, and rotation speed information. The road condition sensor senses road condition. The rotation speed information is changed according to the road condition information. The battery information is supplied from the ISG. The acceleration will information is supplied from the acceleration pedal sensor.

Description

Hybrid vehicle control device according to road conditions {APPARATUS FOR CONTROLLING HYBRID VEHICLE ACCORDING TO ROAD CONDITION}

The present invention relates to a control device of a hybrid vehicle according to a road condition, and more particularly, unnecessary fuel by adding a driving condition using a motor based on battery remaining amount and road condition information, motor rotation speed information, and driver's acceleration determination information. It relates to a device to prevent its use.

In general, an environmentally friendly hybrid vehicle for reducing air pollution by an internal combustion engine vehicle uses an engine and an electric motor, which are internal combustion engines, so that the fuel economy of the internal combustion engine is driven to the highest in response to each driving situation. When braking and decelerating, the motor operates as a generator to recover the regenerative braking energy as electrical energy to charge the battery, resulting in improved fuel economy compared to gasoline engines. You can drive alone.

The hybrid vehicle employs a dual-use internal combustion engine engine and a separate power source motor, so that the operating area of the engine is at the highest efficiency point and the power required for acceleration or deceleration is imposed through the motor to reduce the burden on the engine. As a hybrid, a hybrid electric vehicle is used to reduce fuel consumption and exhaust gas, which is typically used between the engine and the transmission in order to accelerate or decelerate the operating area of the internal combustion engine at the highest efficiency point. An electric motor is installed to reduce the burden on the engine by imposing necessary power, and a double clutch is provided between the motor and the engine to match rotation between the engine and the motor.

At this time, the hybrid vehicle is a pure electric vehicle mode using only the rotational force of the motor in the electric vehicle (EV) mode, or the rotational force of the engine in the hybrid electric vehicle (HEV) mode as the main power, and the rotational force of the motor as an auxiliary power It operates in the mode you use.

In addition, a hybrid vehicle has a hard type hybrid structure in which a drive output of a motor is generally about 50 kW, and a motor that assists the output of the engine includes a transmission (A / T, auto transmission) and a torque converter (T / CON, torque converter). By inserting the engine clutch to insert / block the connection between the motor and the engine at the same time, the drive output of the motor can be roughly classified into a soft type hybrid structure with a relatively small output of about 13 kW.

The soft type hybrid vehicle starts by providing a power source supplied from a battery to a transmission. When the driving speed reaches 800 RPM, the soft type hybrid vehicle starts the engine using the ISG and transmits driving power from the engine to the transmission. Therefore, the engine is not operated when the vehicle is driven and stopped, thereby saving fuel.

In such a general hybrid vehicle, there is no program for setting a driving condition to select one of the rotational force of the motor or the engine rotational force based on the road condition. Therefore, even though it is a road capable of constant speed driving, if the vehicle meets the driving conditions with the engine rotational force, the vehicle is unconditionally driven by using the fuel of the internal combustion engine. Therefore, the exhaust gas is discharged due to the unnecessary use of fuel of the internal combustion engine during the constant speed driving, which implies the risk of environmental pollution.

Accordingly, the present invention has been made to solve such a problem, an object of the present invention, the rotational speed of the motor is changed according to the road condition information provided from the road condition detection device and the remaining battery amount is more than the first predetermined value A road that can prevent unnecessary fuel use and exhaust gas emission according to fuel use by setting a driving condition to an EV mode which runs at a constant speed above a threshold and there is no acceleration will from the acceleration will information, and runs at the rotational force of the motor. It is to provide a control device for a hybrid vehicle according to the state.

Technical problem according to the first aspect of the present invention for achieving this object is,

A hybrid control device configured to collectively control the vehicle based on the acceleration pedal detection unit, an integrated start generator (ISG), the motor controller, and the acceleration determination information, the battery information, and the rotational speed information provided from the motor; And

A road condition detecting device for detecting and transmitting road conditions;

The hybrid control device,

And a driving condition is set on the basis of the rotation speed information of the motor, the battery information provided from the ISG, and the acceleration determination information provided from the acceleration pedal detection unit. do.

The driving condition is characterized in that the EV mode running only by the motor.

The hybrid control device,

If the battery information is equal to or greater than a first predetermined value and the rotational speed of the motor according to the road condition information is equal to or higher than a predetermined threshold, and there is no acceleration intention from the acceleration intention information, the driving condition is set in the EV mode. It is characterized in that it is provided to.

The first predetermined value is 80%, and the threshold value is 5000 RPM.

The road condition detecting apparatus may be a GPS receiver which processes road location information received from the GPS to generate road condition information and provides the road condition information to the hybrid control device through a wired / wireless communication network.

According to the present invention, the remaining speed of the battery is equal to or greater than a first predetermined value and the rotational speed of the motor that changes according to the road state information provided from the road state sensing device is a constant speed or deceleration drive of a threshold value or more, and the acceleration will depend on the acceleration will information. By setting the driving conditions to the EV mode to run with the rotational force of the motor when there is no, the effect that can prevent the unnecessary fuel use and the exhaust gas emissions due to the fuel use is obtained.

DETAILED DESCRIPTION In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings that illustrate preferred embodiments of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

1 is a view showing the configuration of a control device of a hybrid vehicle according to a road state according to the present invention, Figure 2 is a graph showing a table value stored in advance in the hybrid control device shown in FIG.

First, referring to FIG. 1, a hybrid vehicle according to a road state according to the present invention may generate a driver's acceleration will information by detecting a hybrid control device 11 for controlling overall control of a vehicle and a leakage of an acceleration pedal. The engine which operates under the control of the accelerator pedal detection unit 13 and the hybrid control device 13 and the hybrid control device 13 and operates as a generator in an engine start and engine stop state and charges the motor. An integrated start generator (ISG) 15 for driving the engine and a motor and a motor controller 17 that operate under the control of the hybrid control device 11 and drive the rotational force when the engine is started.

In addition, the hybrid vehicle according to the present invention further includes a road condition detecting apparatus 21 for detecting and transmitting a road condition. The road condition detecting apparatus 21 generates road condition information by processing location information provided from the GPS, and the road condition information is transmitted to the hybrid control device 11 through a wired / wireless communication network.

In addition, the hybrid control apparatus 11 may include road state information provided from the road state detection device 21, battery information supplied from the ISG 15, rotation speed information of the motor 17, and the acceleration pedal detection unit. A driving condition is set in the EV mode on the basis of the acceleration will information provided from (13).

That is, when the battery information is greater than or equal to a predetermined first predetermined value, and the rotational speed of the motor that changes according to the road state information provided from the road state sensing device is a constant speed running above a threshold value and there is no acceleration willing from the acceleration will information, the motor. The travel condition is set to the EV mode for traveling with the rotational force of.

The first predetermined value is 80%, and the threshold is preset at 5000 RPM, which may be set differently according to the designer's intention, and is previously stored in the hybrid control device 11.

As shown in FIG. 2, the plurality of predetermined values and thresholds are previously stored in the hybrid control apparatus 11 as table values corresponding to motor rotational speed, battery information, and acceleration will information according to road state information.

By this configuration, first, the road condition information provided from the road condition detecting device 21, the acceleration will information supplied from the acceleration pedal detecting unit 13, the battery information supplied from the ISG 15, and the motor control unit. And the hybrid control device 11 which has received the rotational speed information supplied from the motor 17, sets the travel mode on the basis of the above condition.

The vehicle is driven by the driving force of the motor 17 by setting the hybrid control device 11 to the EV mode during the initial engine start or when the engine is stopped.

At this time, when the running speed is 800 RPM or more or the remaining battery amount supplied from the ISG 15 is less than or equal to the second predetermined value (45%), the hybrid controller 11 sets the engine running mode, and thus the ISG 15 The car is driven by the engine according to the driving force of.

In addition, the rotation speed of the motor 17 is determined to be a constant speed or deceleration drive above a predetermined threshold (5000 RPM) according to the road condition information supplied from the road condition detecting apparatus 21, and the current ISG 15 is When the remaining battery amount is 80% or more, the hybrid control device 11 is set to the EV mode, and thus the vehicle is driven by the driving force of the motor 17.

So far I looked at the center of the preferred embodiment for the present invention. Those skilled in the art will understand that the present invention can be embodied in a modified form without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments should be considered in descriptive sense only and not for purposes of limitation. The scope of the present invention is shown not in the above description but in the claims, and all differences within the scope should be construed as being included in the present invention.

1 is a view showing the configuration of a control device for a hybrid vehicle according to a road state according to the present invention.

FIG. 2 is a graph showing table values stored in the hybrid control device of FIG. 1.

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

11 hybrid control device 13 acceleration pedal detection unit

15: ISG 17: motor control unit and motor

21: road condition detection device

Claims (6)

A hybrid control device configured to collectively control the vehicle based on acceleration determination information, battery information, and rotation speed information provided from an acceleration pedal detection unit, an integrated start generator (ISG), a motor controller, and a motor, respectively; And A road condition detecting device for detecting and transmitting road conditions; The hybrid control device, And a driving condition is set on the basis of the rotation speed information of the motor, the battery information provided from the ISG, and the acceleration determination information provided from the acceleration pedal detection unit. Hybrid vehicle control device according to the road condition. The hybrid vehicle control apparatus according to claim 1, wherein the driving condition is an electric vehicle (EV) mode in which the vehicle is driven only by a motor. The said hybrid control apparatus of Claim 1 or 2, If the battery information is equal to or greater than a first predetermined value and the rotational speed of the motor according to the road condition information is equal to or higher than a predetermined threshold, and there is no acceleration intention from the acceleration intention information, the driving condition is set in the EV mode. Hybrid vehicle control apparatus according to the road condition characterized in that it is provided to. 4. The control apparatus of a hybrid vehicle according to claim 3, wherein the first predetermined value is 80%. The control device of a hybrid vehicle according to claim 4, wherein the threshold is 5000 RPM. The apparatus of claim 1, wherein the road state detection apparatus is a GPS receiver that processes road position information received from a GPS to generate road state information, and provides the road state information to the hybrid control device through a wired / wireless communication network. Hybrid vehicle control device according to the road condition.

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