KR100927088B1 - Method and apparatus for accelerating hybrid electrical vehicle - Google Patents

Abstract

Disclosed is a driving control apparatus and method for a hybrid vehicle, and the present invention provides an accelerator pedal; And an IPM that collectively controls the hybrid vehicle according to the operation of the accelerator pedal, wherein the IPM controls a hydraulic pressure of the engine clutch for direct connection of the engine clutch after receiving an operation state of the acceleration pedal according to the driver's acceleration will. Executing the over control, and executing the handshaking control to increase and decrease the engine torque and the torque of the electric motor to the first inclination and the second inclination, respectively, after executing the hydraulic control of the engine clutch, and during the handshaking control When the torque of the engine clutch is received and the engine torque is greater than the torque of the engine clutch, the engine torque is provided to correct the first inclination smaller than the torque of the engine clutch, and according to the present invention, the engine clutch is directly connected according to the driver's will. Power control of the electric motor and engine simultaneously with hydraulic control of the engine clutch Is able handshaking can not be executed because this is done quickly, the power switch can prevent the shift shock caused by the sudden direct connection of the engine clutch improve the riding comfort.

Automotive, hybrid, automatic transmission, motor, engine, IPM

Description

METHOD AND APPARATUS FOR ACCELERATING HYBRID ELECTRICAL VEHICLE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for accelerating control of a hybrid vehicle. More particularly, the present invention relates to an apparatus and a method for speeding up power switching and minimizing a shock generated during power switching.

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 driving range 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. In addition, a hybrid electric vehicle is used to reduce fuel consumption and emissions, which is usually between the engine and the transmission, with the operating area of the internal combustion engine at the highest efficiency point, when accelerating or decelerating. 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.

In this case, 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). ), The engine clutch is inserted so that the connection between the motor and the engine can be combined and blocked, and the driving output of the motor can be roughly classified into a soft type hybrid structure with a relatively small power 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.

That is, if the vehicle speed is a high speed traveling request of a predetermined value or more, as shown in a) of FIG. 1, when the engine 1 is started and the engine speed reaches the target value, the engine clutch is directly connected to the driving force of the electric motor. To the engine.

As shown in a) of FIG. 1, the brad over control is performed to increase the oil pressure of the engine clutch to directly connect the engine clutch after driving the engine with the current electric motor to raise the vehicle speed to a predetermined RPM.

After this, torque hanshacking is performed, in which power is switched from the electric motor to the engine after the engine clutch is directly connected, that is, the engine torque is increased and the torque of the electric motor is decreased.

That is, since torque handshaking is performed in synchronization with the time when the engine clutch is completely connected after the Bradover control for hydraulic control of the engine clutch in a general hybrid car, it takes 1200 ms for this power to be completely converted. That is, the response speed to the driver's willingness to slow down became slow.

Accordingly, the present invention has been made to solve such a problem, and an object of the present invention is to perform a handshaking control for controlling an electric motor and engine torque simultaneously with the hydraulic control of the engine clutch while driving. An object of the present invention is to provide an acceleration control apparatus and method for a hybrid vehicle, which enables a quick response speed to the acceleration will.

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

Accelerator pedal; And

An IPM that collectively controls the hybrid vehicle according to the acceleration will request signal supplied from the acceleration pedal,

The IPM is,

Executes a braid over control for controlling the hydraulic pressure of the engine clutch according to the driver's acceleration will request signal,

Executing the handshaking control of increasing the engine torque according to the first predetermined slope and decreasing the electric motor torque according to the second predetermined slope during the braid over control,

During the handshaking control, the engine torque and the torque of the engine clutch are received so that when the engine torque is greater than the torque of the engine clutch, the engine torque is characterized in that it is provided to correct the first slope smaller than the torque of the engine clutch.

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

Accelerator pedal; And

An IPM that collectively controls the hybrid vehicle according to the acceleration will request signal supplied from the acceleration pedal,

On the other hand, the IPM is

After receiving the operation state of the acceleration pedal according to the driver's acceleration will to execute a braid over control for controlling the hydraulic pressure of the engine clutch for the direct connection of the engine clutch,

Executing the handshaking control of increasing and decreasing the engine torque and the torque of the electric motor to the first inclination and the second inclination, respectively, after executing the hydraulic control of the engine clutch,

During the handshaking control, the engine torque and the torque of the engine clutch are received so that when the engine torque is greater than the torque of the engine clutch, the engine torque is characterized in that it is provided to correct the hydraulic control of the engine clutch to be smaller than the torque of the engine clutch.

Technical problem according to the third aspect of the present invention for achieving the above object,

a) detecting an operating state of the accelerator pedal;

b) executing a braid over control for increasing the torque of the engine clutch by raising the hydraulic pressure of the engine clutch in accordance with the operation state of the accelerator pedal in step a);

c) executing handshaking control to increase the engine torque to a first predetermined slope and to reduce the electric motor torque to a second predetermined slope;

d) receiving the torque of the engine clutch during the handshaking control to determine whether the torque of the engine clutch is greater than the engine torque; and if the engine clutch torque is greater than the engine torque as a result of the determination, the engine torque is greater than the torque of the engine clutch. A low calibration step,

e) correcting the preset first slope lower than the torque of the engine clutch.

Technical problem according to the fourth aspect of the present invention for achieving the above object,

A) detecting the operating state of the accelerator pedal;

B) executing a braid over control for increasing the torque of the engine clutch by raising the oil pressure of the engine clutch in accordance with the operation state of the accelerator pedal in step A);

C) executing a handshaking control that increases the engine torque to a first predetermined slope and decreases the electric motor torque to a second predetermined slope;

D) receiving the torque of the engine clutch during the handshaking control to determine whether the torque of the engine clutch is greater than the engine torque, and if the engine clutch torque is greater than the engine torque as a result of the determination, the torque of the engine clutch is greater than the engine torque. A high correction step,

E) in step D), further comprising the step of correcting the torque of the engine clutch higher than the engine torque through the hydraulic control of the engine clutch.

As described above, according to the present invention, in order to directly connect the engine clutch according to the driver's acceleration will, the engine torque is increased to a first predetermined slope during the hydraulic control of the engine clutch and the torque of the electric motor is increased. By executing the handshaking control which decreases by the set second slope, but the engine torque is larger than the torque of the engine clutch, by setting the engine torque smaller than the engine clutch torque through correction of the first slope or hydraulic control of the engine clutch, power switching The time can be reduced to a minimum, and the response time for acceleration will be reduced to a minimum.

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.

2 is a block diagram showing the configuration of a hybrid vehicle according to an embodiment of the present invention, Figure 3 is a waveform diagram showing the output signal of each part of Figure 2, Figure 4 is an acceleration control process of the hybrid controller Is a flow chart.

As shown in the figure, the hybrid vehicle according to an embodiment of the present invention, the configuration of the driving device of the hybrid vehicle according to an embodiment of the present invention, the acceleration request signal supplied from an Excel position sensor (not shown) When received, the IPM 10 performs the Brad Over control and the handshaking control according to the engine speed supplied from the outside, and the engine 40 side according to the control of the IPM 10. An engine clutch 20 directly connected to the engine and driven by a driving force of the engine, an engine controller 30 that controls torque of the engine 40 under the control of the IPM 10, and an electric motor under the control of the IPM 10. The electric motor control part 50 which controls the torque of 60 is included.

Here, the IPM 10 drives the driving force of the electric motor 60 through the electric motor control unit 50 during a low speed driving having a vehicle speed lower than or equal to a predetermined value, and the driver's willingness to accelerate when the vehicle speed is higher than or equal to the predetermined value. Accordingly generates an engine start signal and an engine clutch direct connection signal.

That is, when the acceleration state is received from the accelerator pedal 41 as shown in a) of FIG. 3, which occurs according to the driver's acceleration will, the IPM 10 is connected to b) of FIG. As illustrated, the oil pressure of the engine clutch 23 is raised to directly connect the engine clutch 23 to the engine 40 side.

Subsequently, as shown in (c) of FIG. 3, the IPM 10 executes handshaking control through the engine 40 torque and the torque of the electric motor 60 in synchronization with the direct connection point of the engine clutch 20. do.

That is, the torque of the engine 40 is increased to a first predetermined slope, the torque of the electric motor 60 is reduced to a second predetermined slope, and the power is switched.

At this time, when the engine torque is greater than the torque of the engine clutch, the engine clutch is not directly connected to the engine side.

Accordingly, the IPM 10 receives the received engine torque and the torque of the engine clutch 20 so that when the engine torque is greater than the torque of the engine clutch 20, the first slope so that the engine torque is smaller than the torque of the engine clutch. It is provided to correct.

That is, in the exemplary embodiment of the present invention, it is described that the first inclination is corrected so that the engine torque is smaller than the torque of the engine clutch. However, the torque of the engine clutch is corrected to be greater than the engine torque through the oil pressure of the engine clutch. It may be.

If the torque of the engine clutch is larger than the engine torque, the handshaking control of the engine and the electric motor is continuously performed at the first and second inclinations.

FIG. 4 is a flowchart illustrating an acceleration control process of the hybrid vehicle by the IPM 10 illustrated in FIG. 2. An acceleration control process of a hybrid vehicle will be described with reference to the drawings.

First, the IPM 10 receives an operation state of an acceleration pedal (not shown) through step 101 and executes braid over control through hydraulic control of the engine clutch 20 through step 103. .

Accordingly, the IPM 10 executes handshaking control with the first and second inclinations of the engine 40 and the electric motor 60 in synchronization with the braid over control (105).

The IPM 10 then receives the engine 40 torque and the torque of the engine clutch 20 (107), and then through step 109 the engine 40 torque is greater than the torque of the engine clutch 20. Judge.

When the engine torque is greater than the torque of the engine clutch 20 as a result of the determination of step 109, the IPM 10 corrects the first inclination (111) and proceeds to the step 105 to correct the first product. 1 The handshaking control of the engine and the electric motor is performed at the inclination and the preset second inclination.

Subsequently, the IPM 10 determines whether the handshaking control is terminated when the engine torque is less than the torque of the engine clutch 20 in the step 109 (113), and terminates the program when the handshaking control ends. do.

Therefore, it is possible to minimize the power switching delay time due to the braid over control for the hydraulic control of the engine clutch and the handshaking control for the torque control of the engine and the electric motor.

 As such, those skilled in the art to which the present invention pertains will understand that the present invention may be embodied in other specific forms without changing to the technical spirit or essential features of the present invention. Therefore, the above-described embodiments are to be understood in all respects as illustrative and not restrictive. The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. .

1 is a waveform diagram showing an output signal of each part of a typical hybrid vehicle.

2 is a diagram illustrating a configuration of an acceleration control apparatus for a hybrid vehicle according to an exemplary embodiment of the present invention.

FIG. 3 is a waveform diagram illustrating output signals of respective units shown in FIG. 2.

4 is a flowchart illustrating an acceleration control process of a hybrid vehicle according to an exemplary embodiment of the present invention.

Claims (6)

Accelerator pedal; And An IPM that collectively controls the hybrid vehicle according to the acceleration will request signal supplied from the acceleration pedal, The IPM is, Executing a braid over control for controlling the hydraulic pressure of the engine clutch according to the acceleration will request signal, Executing the handshaking control of increasing the engine torque according to the first predetermined slope and decreasing the electric motor torque according to the second predetermined slope during the braid over control, Receiving the engine torque and the torque of the engine clutch during the handshaking control, when the engine torque is greater than the torque of the engine clutch is provided to correct the first inclination of the engine torque less than the torque of the engine clutch Acceleration control device. Accelerator pedal; And An IPM that collectively controls the hybrid vehicle according to the acceleration will request signal supplied from the acceleration pedal, The IPM is After receiving the operation state of the acceleration pedal according to the driver's acceleration will request signal, executing the braid over control for controlling the oil pressure of the engine clutch for direct connection of the engine clutch, Executing the handshaking control of increasing and decreasing the engine torque and the torque of the electric motor to the first inclination and the second inclination, respectively, after executing the hydraulic control of the engine clutch, And receiving the engine torque and the torque of the engine clutch during the handshaking control to correct the hydraulic control of the engine clutch when the engine torque is greater than the torque of the engine clutch. Acceleration control device of the car. a) detecting an operating state of the accelerator pedal; b) executing a braid over control for increasing the torque of the engine clutch by raising the hydraulic pressure of the engine clutch in accordance with the operation state of the accelerator pedal in step a); c) executing handshaking control to increase the engine torque to a first predetermined slope and to reduce the electric motor torque to a second predetermined slope; d) receiving the torque of the engine clutch during the handshaking control to determine whether the torque of the engine clutch is greater than the engine torque; and if the engine clutch torque is greater than the engine torque as a result of the determination, the engine torque is greater than the torque of the engine clutch. And a low correction step. The acceleration control method of claim 3, further comprising e) correcting the preset first slope lower than torque of the engine clutch in step d). A) detecting the operating state of the accelerator pedal; B) executing a braid over control for increasing the torque of the engine clutch by raising the oil pressure of the engine clutch in accordance with the operation state of the accelerator pedal in step A); C) executing a handshaking control that increases the engine torque to a first predetermined slope and decreases the electric motor torque to a second predetermined slope; D) receiving the torque of the engine clutch during the handshaking control to determine whether the torque of the engine clutch is greater than the engine torque, and if the engine clutch torque is greater than the engine torque as a result of the determination, the torque of the engine clutch is greater than the engine torque. Acceleration control method for a hybrid vehicle, characterized in that it comprises a high correction step, The method of claim 5, further comprising correcting a torque of the engine clutch higher than the engine torque through hydraulic pressure control of the engine clutch in step D). .

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