KR100245677B1 - Runup prevention device and method - Google Patents

Abstract

If the driving condition of the vehicle is not included in the power on or off region but in the middle region, the duty ratio of the control signal for hydraulic control is corrected according to the driving speed of the vehicle. In order to provide a run-up preventing device and a method of an automatic transmission that converts an operating state to improve responsiveness during shifting and prevent a run-up phenomenon, an electrical signal outputted according to a driving state of a vehicle changes, Driving condition detecting means for determining a driving area; Vehicle speed detecting means for changing a state of an electrical signal output in accordance with a driving speed of a vehicle; When the driving state of the vehicle is shifted from the power on area to the power off area and the upshift operation is performed from 2 speeds to 3 speeds by reading the signals output from the driving state detecting means and the vehicle speed detecting means, the learning is performed in the power on state. And a shift control means for correcting the duty ratio according to the running speed of the vehicle and outputting a control signal having the determined duty ratio to the pressure control solenoid valve.

Description

Run-up prevention device of automatic transmission and its method

1 is a block diagram of a run-up prevention device of an automatic transmission according to an embodiment of the present invention.

2 is a flowchart illustrating a method of preventing a runup of an automatic transmission according to an exemplary embodiment of the present invention.

The present invention relates to an apparatus and method for preventing run up of an automatic transmission, and more particularly, to exist in an intermediate region of a shift pattern generated by a shift pattern that changes according to a power on / off state of an automatic transmission. The present invention relates to a run-up preventing device and a method of controlling an automatic transmission to control the duty ratio to adjust the size of the hydraulic pressure used as a control pressure of the automatic transmission to reduce the run-up phenomenon occurs.

The opening amount of the throttle valve according to the power-on state when the driving state in which the automatic transmission is mounted is in the power-on state of a predetermined shift pattern that operates the corresponding drive wheels by the rotational force of the engine. The shifting operation of the automatic transmission is controlled according to the shifting pattern that is already set according to the rotational speed of the engine.

Therefore, when executing the shift operation according to the set shift pattern, the control device of the automatic transmission controls the duty ratio of the control signal output to the hydraulic control solenoid valve to control the operation state of each corresponding friction element of the hydraulic device to the corresponding state.

However, when the size of the load applied to the driving operation of the vehicle is increased by the operation of the air conditioner, the shift pattern when the driving state of the vehicle is switched to the power-off state, that is, the state in which the operation of the engine is controlled by the rotational force of the driving wheel. Changes in.

Therefore, the shift pattern is divided into an intermediate region not belonging to any one of the power on / off region and the power on / off region according to the driving state of the vehicle.

Therefore, when the driving state of the vehicle belongs to the middle region when the driving state of the vehicle changes from the power-on state to the off state due to an increase in the magnitude of the load applied to the engine such as an air conditioner, conventionally, Accordingly, since the control operation of the automatic transmission is performed, the duty ratio is determined by the value of the continuously learned state according to the power-on state when calculating the duty ratio of the control signal for the hydraulic control.

Therefore, when driving at a certain speed, when the driving operation of the vehicle is performed in a power-off state that does not execute the driving operation of the vehicle using the acceleration petrol, the shift state is changed from the second speed to the third speed state.

However, since the duty ratio for controlling the operation of the hydraulic control solenoid valve is determined according to the learned control operation in the power-on state, the learned correction duty ratio is increased by the determined correction amount.

Since the learned duty ratio is increased as described above, the magnitude of the control pressure applied to each corresponding friction element is reduced, which causes a problem in that the friction element whose operating state changes in accordance with the shift state cannot be operated accurately with the reduced control pressure. .

Therefore, since the response of the operation during the shift is reduced and the corresponding friction element does not operate correctly, since the exact fastening operation with the corresponding friction element is not performed, a problem arises in that the run-up phenomenon occurs to reduce the riding comfort of the vehicle.

Therefore, an object of the present invention is to solve the above-described problems, and the duty ratio of the control signal for hydraulic control according to the traveling speed of the vehicle when the driving state of the vehicle is not included in the power on or off region but included in the intermediate region. Since the operation state of each friction element is changed according to the proper shifting operation according to the driving state, the automatic transmission run-up preventing device and method for improving the response during shifting and preventing the run-up phenomenon are provided. will be.

As a means for achieving the above object, the configuration of the present invention,

Driving state sensing means for changing an output electrical signal in accordance with the driving state of the vehicle so as to determine the driving region of the vehicle;

Vehicle speed detecting means for changing a state of an electrical signal output in accordance with a driving speed of a vehicle; When the driving state of the vehicle is shifted from the power on area to the power off area and the upshift operation is performed from 2 speeds to 3 speeds by reading the signals output from the driving state detecting means and the vehicle speed detecting means, the learning is performed in the power on state. And a shift control means for correcting the duty ratio according to the running speed of the vehicle and outputting a control signal having the determined duty ratio to the pressure control solenoid valve.

Another configuration of the present invention for achieving the above object is to read the signals output from the driving state detection means and the vehicle speed detection means, so that the driving state of the vehicle transitions from the power on area to the power off area at two speeds. When the upshift operation is performed at three speeds, the duty rate learned in the power-on state is corrected according to the driving speed of the vehicle, and the control signal having the determined duty rate can be output to the pressure control solenoid valve.

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

1 is a block diagram of a run-up prevention apparatus of an automatic transmission according to an embodiment of the present invention, and FIG. 2 is an operation flowchart of a run-up prevention method of an automatic transmission according to an embodiment of the present invention.

Looking at the configuration of the present invention with reference to Figure 1, the engine speed detection unit 11 and the opening state is changed according to the operation of the accelerator pedal, the state of the electrical signal output in accordance with the rotational speed of the engine The throttle valve opening degree detection unit 12 in which the state of the electrical signal output in accordance with the opening degree of the throttle valve changes, The vehicle speed detection unit 13 in which the state of the electric signal output in accordance with the vehicle traveling speed changes, and the detection By reading the signals output from the means 11 to 13, the duty ratio of the control signal for controlling the magnitude of the hydraulic pressure is corrected according to the driving speed of the vehicle when the driving state of the vehicle is changed from the power on region to the power off region. The operating state changes according to the shift control section 2 for outputting a control signal having the determined duty ratio and the control signal output from the shift control section 3, so that the control pressure of the hydraulic system is changed. It consists of a pressure control solenoid valve (3) to control the size of the.

The operation of the present invention made as described above is as follows.

First, when power required for the operation of each device is supplied, each corresponding operation is executed.

Therefore, the shift control unit 2 reads the signals output from the engine speed detection unit 11 and the throttle valve opening degree detection unit 12 (S11), and the degree of opening is increased according to the engine speed and the operation degree of the accelerator pedal. The opening amount of the changed throttle valve is determined (S12).

The engine speed 11 uses a photo sensor whose cycle of the pulse signal output in accordance with the rotational speed of the crankshaft, or a magnetic field sensor whose state of induced voltage changes.

Therefore, the transmission control unit 2 determines the rotational speed of the engine using pulse signals or sinusoids outputted in accordance with the rotational speed of the crankshaft which changes according to the operating state of the engine.

The throttle valve opening detection unit 12 uses a potentiometer, etc., in which the position of the variable resistor is changed according to the opening state of the throttle valve, in which the opening amount is changed according to the operation degree of the accelerator pedal. The opening amount can be determined by determining the voltage having the corresponding magnitude output according to the result.

When the number of rotations of the engine and the opening amount of the throttle valve are determined as described above, the shift control unit 2 uses the data map that has already been set, and then the power-on or power-off is performed when the current driving state of the vehicle changes from 2 to 3 speeds. It is determined whether it exists in the intermediate region instead of the region (S13).

When the determined driving state is present in the power on or off region when upshifted from the second speed to the third speed as described above, the shift control unit 2 normally controls the hydraulic control solenoid when the driving state of the vehicle exists in the power on or off region. In order to control the operation of the valve 3, a control operation for determining the duty ratio of the control signal is executed (S14).

However, when the driving state of the vehicle determined according to the rotational speed of the engine and the degree of opening of the throttle valve exists in the intermediate region during the transition from the power-on state to the off-state when upshifting from the second to the third speed, the shift control unit ( 2) calculates the final control duty rate using the learning value corrected according to the driving speed of the vehicle to the duty rate Du learned in the power-on state as follows.

Therefore, the shift control unit 2 reads the signal output from the vehicle speed detecting unit 13 (S) to determine the traveling speed of the vehicle (S15).

The vehicle speed detecting unit 13 uses a photo sensor or a magnetic field sensor like the engine speed detecting unit 11 to change the state of the output pulse or the state of the output voltage according to the output shaft of the transmission or the rotational speed of the wheel. The driving speed of the vehicle is determined by reading the signal (S16).

When the running speed of the vehicle is determined, the shift control unit 2 calculates the duty ratio of the control signal for controlling the pressure control solenoid valve 3 through the equation (1) below (S17).

Du '= Du + dD-mid * (1-No / C)

Where Du 'is the final duty rate,

Du: Duty ratio at the second to third speed upshift in the middle area,

dD-mid is the learned value at power on,

No: driving speed of the car,

C is the set constant).

When the final duty ratio for controlling the operation of the hydraulic control solenoid valve 3 is calculated, the shift control unit 3 outputs a control signal having the duty ratio to the pressure control solenoid valve 3 (S18), and sets the pressure in the set state. The operation of the control solenoid valve 3 can be made.

As described above, when the driving state of the vehicle is changed and the upshift operation is performed from 2 speeds to 3 speeds in the middle region of the power-on area and the power-off area, the duty ratio is corrected according to the driving speed of the car. It is possible to obtain the effect of preventing the delay of responsiveness and the run-up phenomenon caused by the reduction of the control pressure for operating the friction element.

Claims (5)

Driving state sensing means for changing an output electrical signal in accordance with the driving state of the vehicle so as to determine the driving region of the vehicle; Vehicle speed detecting means for changing a state of an electrical signal output in accordance with a driving speed of a vehicle; When the driving state of the vehicle is shifted from the power on area to the power off area and the upshift operation is performed from 2 speeds to 3 speeds by reading the signals output from the driving state detecting means and the vehicle speed detecting means, the learning is performed in the power on state. And a shift control means for correcting the duty ratio according to the traveling speed of the vehicle and outputting a control signal having the determined duty ratio to the pressure control solenoid valve. According to claim 1, wherein the driving state detection means, the engine speed detection unit 11 that changes the state of the electrical signal output in accordance with the rotational speed of the engine, and the throttle opening state changes according to the operation of the accelerator pedal An apparatus for preventing run up of an automatic transmission, characterized in that it comprises a throttle valve opening degree detection unit (12) in which the state of the electric signal outputted according to the opening degree of the valve changes. The shift control means according to claim 1, wherein the shift control means changes the duty ratio when the driving state of the vehicle is shifted to an intermediate region between the power-on area and the power-off area so that an upshift operation is performed from 2 to 3 speeds. Run-up prevention device of an automatic transmission, characterized in that the calculation. Du '= Du + dD-mid * (1-No / C) Where Du 'is the final duty rate, Du: Duty ratio at the second to third speed upshift in the middle area, dD-mid is the learned value at power on, No: driving speed of the car, C is the set constant). When the driving state reads signals output from the sensing means and the vehicle speed detecting means, and the driving state of the vehicle is changed from the power on region to the power off region, and the upshift operation is performed from 2 speeds to 3 speeds, And correcting the learned duty ratio according to the running speed of the vehicle, and outputting a control signal having the determined duty ratio to the pressure control solenoid valve. The automatic transmission of claim 4, wherein the duty ratio is calculated when the driving state of the vehicle is changed from the power on region to the power off region and the upshift operation is performed from 2 speeds to 3 speeds through the following equation. How to avoid runups. Du '= Du + dD-mid * (1-No / C) Where Du 'is the final duty rate, Du: Duty ratio at the second to third speed upshift in the middle area, dD-mid is the learned value at power on, No: driving speed of the car, C is the set constant).