KR19990050701A - Transmission control device and method of automatic transmission - Google Patents

Abstract

The present invention relates to a shift control apparatus and a method of an automatic transmission, the vehicle driving state detection means for detecting a signal that is variable and output according to the driving state of the vehicle and outputs it as a corresponding electric signal; When the driver's will is changed to the acceleration will while the shift stage is performing the power-off manual 4 → 2 downshift shifting by receiving the electric signal outputted from the vehicle driving state detecting means and pressing the accelerator pedal, Control means for setting a shift state differently according to a time point at which the throttle opening degree, which is a stepped time, is changed to a set value or more and outputting a corresponding shift control signal; It includes a driving means for receiving the duty control signal output from the control means for performing the shift control, even if the shift state is changed by the driver's acceleration will during power-off manual 4 → 2 downshift shifting By preventing the up shock from occurring, the durability and the shifting feeling of the automatic transmission can be improved, and the riding comfort can be improved.

Description

Transmission control device and method of automatic transmission

The present invention relates to a shift control apparatus and a method of an automatic transmission. More specifically, in a four-speed vehicle, the driver turns his foot off the accelerator pedal with a deceleration will. The present invention relates to a shift control apparatus for an automatic transmission and a method thereof for preventing a run-up shock caused by driving by changing the driving state from the power-on 4 to 2 downshift according to the acceleration pedal of the driver. .

In general, a vehicle equipped with an automatic transmission may be operated by automatically shifting the transmission gear to a target shift stage by controlling oil pressure within a shift range set according to the traveling speed of the vehicle and the opening amount of the throttle valve.

Therefore, a vehicle equipped with an automatic transmission in which an operating state is controlled according to hydraulic pressure as described above does not need an operation of a clutch pedal to cut off power from an engine in order to change an operating state of a corresponding shift gear. The driving fatigue can be reduced, and since the engine stall does not occur due to the driver's malfunction or immaturity during driving, the driving operation can be facilitated even for a beginner.

In the automatic transmission, the torque converter changes the rotational power of the engine, and the solenoid valve is controlled by a control signal applied from the shift control device according to the driving state of the vehicle so that the corresponding friction element is operated. A hydraulic circuit is formed to execute automatic shifting operation.

Therefore, the automatic transmission outputs a control signal corresponding to the driver's shift lever selection position, the vehicle speed, and the opening amount of the throttle valve, and the corresponding solenoid valve is driven by the output signal to change the valve port of the hydraulic circuit. And thereby control the operating state of the actuating friction element for selecting one of the gear stages of the gear stage of the transmission gear mechanism by the hydraulic pressure supplied from the oil pump.

The friction element consisting of the clutch and the brake is transferred to the drive gear after the operation state of the planetary gear device is switched according to the selective operation of the friction element, which is changed to an appropriate transmission ratio.

When the variable power is transmitted to the drive gear, the variable power is transmitted to the driven gear which is geared with the longitudinal reduction gear by the driven gear which is geared with the drive gear, thereby controlling the rotational movement of the wheels to ensure stable driving. Achieve a state.

In a vehicle equipped with an automatic transmission operating as described above, when the driver releases the accelerator pedal according to the driver's deceleration intention during four-speed driving, the power-off manual 4 → 2 downshift stored in the memory as shown in FIG. 1 is attached. Outputs the shift control signal to perform the corresponding shift control.

However, when the driver's driving will change and the driver presses the accelerator pedal to accelerate the vehicle, the shift state is not changed conventionally, and the power-off manual 4 → 2 downshift shift control is continued as described above.

However, in the above conventional technique, when the accelerator pedal is pressed according to the driver's willingness during the power-off manual shift 4 → 2 downshift, the automatic transmission power is switched from the off state to the kick-down power on 4 → 2 downshift shifting state. However, the data stored in the memory for controlling the automatic transmission actually does not have data that changes the shift state by power-off manual 4 → 2 downshift. Even if the power-on state is changed, excessive run-up shock occurs as the power-off manual 4 → 2 downshift shift control is continuously performed.

Accordingly, an object of the present invention is to solve the above problems, and according to the driver's deceleration will during the four-speed drive, the driver's will is changed to acceleration while the shift stage performs the power-off manual 4 → 2 downshift shifting. When the accelerator pedal is pressed, the shift state is set differently according to the point of time when the accelerator pedal is pressed, that is, when the throttle opening degree is changed to a set value or more as shown in FIGS. 3 and 4, thereby outputting a corresponding shift control signal. Power Off Manual 4 → 2 Downshift Prevents run-up shock during shifting even if the shifting state is changed by the driver's acceleration in shifting, thereby improving the durability and shifting feeling of the automatic transmission, and improving riding comfort. An object of the present invention is to provide a shift control apparatus and a method of an automatic transmission.

The present invention for achieving the above object,

Vehicle driving state detection means for detecting a signal that is variable and output according to a driving state of the vehicle and outputting the signal as a corresponding electric signal;

When the driver's will is changed to the acceleration will while the shift stage is performing the power-off manual 4 → 2 downshift shifting by receiving the electric signal outputted from the vehicle driving state detecting means and pressing the accelerator pedal, Control means for setting a shift state differently according to a time point at which the throttle opening degree, which is a stepped time, is changed to a set value or more and outputting a corresponding shift control signal;

And a driving means for receiving the duty control signal outputted from the control means and performing the shift control.

Another invention for achieving the above object,

Determining whether a power-off manual 4 → 2 downshift shift control signal is output when the driver steps out of the accelerator pedal with a deceleration will while driving with the driving shift stage of the vehicle at 4 speeds;

Outputting a power-off manual 4 → 2 downshift shift control duty signal stored in a memory when the power-off manual 4 → 2 downshift shift control signal is outputted;

The power-off manual 4 → 2 downshift shift control signal is outputted, and the driver's opening amount value (TPS) of the throttle valve is changed to be higher than the minimum set reference value when the driver presses the accelerator pedal with the will to accelerate during the shift control. Determining whether it has been made;

In the above, when the driver presses the accelerator pedal with the intention of accelerating, the opening amount value TPS of the throttle valve is changed beyond the set reference value, so that the opening value A of the throttle valve opening amount TPS is changed from the power off manual 4 to 2 downshift. Determining whether the state of the power is varied in the interval from power off to power on 4 → 2 downshift;

When the value of the opening amount TPS of the throttle valve is varied in section A during the power-off manual 4 → 2 downshift shifting, and the state of the power is changed from power-on 4 → 2 downshift, it is the release side of the automatic transmission. And outputting a power-on 4 → 2 downshift shift control duty signal stored in a memory to control the PCSV-B coupled to the PCSV-A.

1 is a power-off manual 4 → 2 downshift shift control duty pattern diagram of a conventional automatic transmission.

2 is a hydraulic circuit diagram of an automatic transmission according to an embodiment of the present invention,

3 is a power-off manual 4 → 2 downshift shift control duty pattern diagram of an automatic transmission according to an embodiment of the present invention;

4 is a power-on 4 → 2 downshift shift control duty pattern diagram of an automatic transmission according to an embodiment of the present invention;

5 is a block diagram of a shift control apparatus of an automatic transmission according to an embodiment of the present invention;

6 is a flowchart illustrating a shift control method of an automatic transmission according to an exemplary embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention, which can be achieved and realized in detail by the above objects, will be described in detail with reference to the accompanying drawings.

As shown in FIG. 5, the configuration of the automatic transmission shift control apparatus according to the embodiment of the present invention,

A vehicle driving state sensing means 10 which detects a signal that is variable and output according to a driving state of the vehicle and outputs the signal as a corresponding electric signal;

If the driver's will is changed to the acceleration will while the shift stage is performing the power-off manual 4 → 2 downshift shifting by receiving the electric signal outputted from the vehicle driving state sensing means 10 and pressing the accelerator pedal, Control means for outputting a corresponding shift control signal by setting the shift state differently according to a point in time when the throttle opening degree, which is the stepped time of the accelerator pedal, is changed to a set value or more;

The driving means 30 receives the duty control signal output from the control means 20 and performs the shift control.

In the above configuration, the vehicle driving detecting means 10

A throttle valve opening degree detection unit 11 for detecting an opening degree of a throttle valve whose opening and closing state is variable in association with an operation state of the accelerator pedal and outputting a corresponding signal;

A vehicle speed detector 12 which detects an output shaft rotational speed of the vehicle and outputs a corresponding signal corresponding to the traveling speed of the vehicle;

A shift stage detecting unit 13 for detecting a variable state of the shift stage and outputting a corresponding signal when the shift stage is changed according to the throttle valve opening amount and the vehicle speed;

A turbine shaft rotational speed sensing unit 14 for sensing a rotational speed of the turbine shaft of the torque converter connected to the input shaft of the transmission and outputting a corresponding signal;

It comprises an engine speed detection unit 15 for detecting the rotational speed of the crankshaft variable according to the operating state of the engine and outputs a corresponding signal.

Power Off Manual 4 to 2 Downshift of the Automatic Transmission Made According to the Configuration As described above with reference to Figs. An example is demonstrated.

When the driver steps out of the accelerator pedal with deceleration in the state that the vehicle is traveling at the speed of four shifts, the control means 20 determines whether a power-off manual 4 to 2 downshift shift control signal is output. (S100).

In the case where the power-off manual 4 → 2 downshift shift control signal is output, the control means 20 outputs the power-off manual 4 → 2 downshift shift control duty signal stored in the memory as shown in FIG. Output to the drive means 30 (S110).

The power-off manual 4 → 2 downshift shift control signal is output to the drive means 30, and the control means 20 opens the throttle valve when the driver presses the accelerator pedal with the willingness to perform the shift control. It is determined whether the measurement value TPS has been changed to 0.684 (v) or more, which is the lowest reference value (S120).

In the above, when the driver presses the accelerator pedal with the will to accelerate, it is determined that the opening amount value TPS of the throttle valve is changed to 0.684 (v) or more, which is the set reference value, the control means 20 determines the opening amount value of the throttle valve ( It is determined when the TPS) is changed.

Accordingly, the control means 20 is controlled by the driver's accelerator pedal operation by changing the value of the throttle valve opening amount TPS shown by the dotted line in Fig. 1 in section A during the power-off manual 4 to 2 downshift shifting. It is determined whether the state of the power is changed from the power-off to the power-on 4 → 2 downshift (S130).

When the value of the throttle valve opening amount TPS due to the driver's accelerator pedal operation is varied in section A during power-off manual 4 → 2 downshift shifting, and the power state is changed from power-on 4 → 2 downshift, The control means 20 is a power-on 4 → 2 downshift shift control duty signal stored in a memory for controlling the PCSV-B which is a side coupled with the PCSV-A which is the release side of the automatic transmission, as shown in FIG. Are respectively output to the driving means 30 (S135).

However, when the value of the throttle valve opening amount TPS shown by a dotted line in FIG. 1 attached by the driver's accelerator pedal operation in step S130 is not varied in the section A during power-off manual 4 to 2 downshift shifting. The control means 20 controls the state of the power from the power-off to the power-off state as the value of the throttle valve opening amount TPS shown in FIG. 3 is varied in the section B during the power-off manual 4 to 2 downshift shifting. It is determined whether the shift is shifted by 4 → 2 downshift (S140).

When the value of the throttle valve opening amount TPS is varied in the section B during the power-off manual 4 → 2 downshift shifting, and the state of the power is changed from the power on 4 → 2 downshift, the control means 20 As shown in FIG. 3, the duty signal of the power-off manual 4 → 2 downshift shift control A1 section stored in the memory is controlled to the drive means 30 to control the PCSV-A which is the release side of the automatic transmission. In order to control the PCSV-B on the coupling side, the duty cycle value of the power-off manual 4 → 2 downshift shift control stored in the memory is corrected to the calculated value by adding the set duty value Δd and then the corresponding duty signal is adjusted. It outputs to the drive means 30, and starts to control the C section (S145).

However, without satisfying the above two conditions, the value of the throttle valve opening amount TPS is varied in section C during the power-off manual 4 to 2 downshift shifting as shown by the solid line of FIG. When the state is changed from power on 4 to 2 down shift, the control means 20 controls the power on 4 stored in the memory for controlling the PCSV-A which is the release side of the automatic transmission as in the conventional art shown in FIG. → 2 downshift shift control outputs a duty signal for controlling section A1 to the driving means 30, and is stored in a memory for controlling the PCSV-B on the coupling side. 4 → 2 downshift shift control C The duty signal for controlling the section is output to the driving means 30 (S150).

However, even when the driver steps on the accelerator pedal with the will to accelerate (S120), when the opening amount value TPS of the throttle valve is not changed to more than 0.684 (v), which is the set reference value, the control means 20 opens the throttle valve. The step S110 of outputting the power-off manual 4? 2 downshift shifting control signal stored in the memory is continued until the measurement value TPS is changed to 0.684 (v) or more, which is a set reference value.

However, if the power-off manual 4 → 2 downshift shift request signal is not output at the shift stage even while the vehicle is driving at 4 speed, the control means 20 returns to the main routine to perform the shift control.

The above embodiments are described as the most preferred embodiments, and the present invention is not limited thereto, and the embodiments can be easily described from the above embodiments.

As described above, according to the embodiment of the present invention, when the shift stage performs the power-off manual 4 → 2 downshift shifting according to the driver's deceleration intention during the four-speed driving, the driver's will is changed to the acceleration intention and the accelerator pedal is pressed. According to the time when the pedal is pressed, that is, when the throttle opening degree is changed beyond the set value as shown in FIGS. 3 and 4, the shift state is set differently and the corresponding shift control signal is output. It is possible to improve the durability and speed of the automatic transmission, and to improve ride comfort by preventing run-up shocks during shifting even if the shift state is changed by the driver's acceleration will during shifting. A shift control apparatus and a method thereof can be provided.

Claims (6)

A vehicle equipped with an automatic transmission, comprising: a vehicle driving state detecting means for detecting a signal that is variable and output according to a driving state of the vehicle and outputting the signal as a corresponding electric signal; When the driver's will is changed to the acceleration will while the shift stage is performing the power-off manual 4 → 2 downshift shifting by receiving the electric signal outputted from the vehicle driving state detecting means and pressing the accelerator pedal, Control means for setting a shift state differently according to a time point at which the throttle opening degree, which is a stepped time, is changed to a set value or more and outputting a corresponding shift control signal; And a driving means for receiving the duty control signal outputted from the control means to perform a corresponding shift control. The apparatus of claim 1, further comprising: a throttle valve opening degree detecting unit configured to detect an opening degree of a throttle valve whose opening and closing state is variable in association with an operation state of the accelerator pedal, and output a corresponding signal; A vehicle speed detection unit configured to detect an output shaft rotation speed of the vehicle and output a corresponding signal corresponding to the traveling speed of the vehicle; A shift stage sensing unit configured to detect a variable state of the shift stage and output a corresponding signal when the shift stage is changed according to the throttle valve opening amount and the vehicle speed; A turbine shaft rotational speed sensing unit configured to detect a rotational speed of the turbine shaft of the torque converter connected to the input shaft of the transmission and output a corresponding signal; A shift control apparatus for an automatic transmission comprising an engine rotation speed detection unit for detecting a rotation speed of a crankshaft which is varied according to an operating state of an engine and outputting a corresponding signal. Determining whether a power-off manual 4 → 2 downshift shift control signal is output when the driver steps out of the accelerator pedal with a deceleration will while driving with the driving shift stage of the vehicle at 4 speeds; Outputting a power-off manual 4 → 2 downshift shift control duty signal stored in a memory when the power-off manual 4 → 2 downshift shift control signal is outputted; The power-off manual 4 → 2 downshift shift control signal is outputted, and the driver's opening amount value (TPS) of the throttle valve is changed to be higher than the minimum set reference value when the driver presses the accelerator pedal with the will to accelerate during the shift control. Determining whether it has been made; In the above, when the driver presses the accelerator pedal with the intention of accelerating, the opening amount value TPS of the throttle valve is changed beyond the set reference value, so that the opening value A of the throttle valve opening amount TPS is changed from the power off manual 4 to 2 downshift. Determining whether the state of the power is varied in the interval from power off to power on 4 → 2 downshift; When the value of the opening amount TPS of the throttle valve is varied in section A during the power-off manual 4 → 2 downshift shifting, and the state of the power is changed from power-on 4 → 2 downshift, it is the release side of the automatic transmission. And outputting a power on 4 → 2 downshift shift control duty signal stored in a memory to control the PCSV-B coupled to the PCSV-A. The method according to claim 3, wherein when the value of the opening amount TPS of the throttle valve is not varied in the section A during the power-off manual 4 → 2 downshift shifting, the power is changed in the section B during the power-off manual 4 → 2 downshift shifting. Determining whether is changed from a power-off to a power-on 4 → 2 downshift; When the value of the opening amount TPS of the throttle valve is changed in the section B during the power-off manual 4 → 2 downshift shifting, and the state of the power is changed from the power on 4 → 2 downshift, it is the release side of the automatic transmission. Power-off manual 4 → 2 stored in memory to control PCSV-A Downshift shift control Outputs the duty signal of section A1, and power-off manual 4 → 2 stored in memory to control the PCSV-B on the coupling side. Correcting the duty value of the downshift shift control B section to a value calculated by adding the set duty value Δd and outputting a corresponding duty signal to start controlling the power-off manual 4 to 2 downshift shift control section C; Shift control method of the automatic transmission made. The throttle valve opening amount (TPS) value of the throttle valve opening amount (TPS) of the power-off manual 4 → 2 when the value of the opening amount (TPS) of the throttle valve is not varied in the section B during the downshift shifting. Determining whether the state of the power is changed from the power-on 4 to the second downshift by varying in the section C during downshift shifting; When the value of the throttle valve opening amount (TPS) is changed in section C during the power-off manual 4 → 2 downshift shifting and the power state is changed from power-on 4 → 2 downshift, PCSV is the release side of the automatic transmission. Power-on 4 → 2 downshift shift control stored in memory to control -A Output duty signal to control section A1, and power-off manual 4 → stored in memory to control the coupling side PCSV-B. 2 Down shift shift control A shift control method of an automatic transmission further comprising the step of outputting a duty signal for controlling a section C. The throttle opening amount value TPS of the throttle valve is changed to be equal to or higher than the set reference value even when the driver presses the accelerator pedal with the will to accelerate. And continuously outputting the power-off manual 4 → 2 downshift shift control signal stored in the memory until the shift control signal is stored.