KR100309004B1 - Method for controlling shifting of automatic transmission - Google Patents

Abstract

PURPOSE: A shift control method of an automatic transmission is provided to prevent run-up shock in shifting by acceleration of a driver during power-off manual 4 to 2 downshift, and to improve driving experience by increasing the durability and shift quality. CONSTITUTION: A control unit detects the output of a power-off manual 4 to 2 downshift control signal(S100), and outputs a power-off manual 4 to 2 downshift duty signal to a driving unit(S110). The opening degree of a throttle valve is compared with the minimum value in stepping on an accelerator pedal(S120). The control unit detects change from power-off 4 to 2 downshift into power-on 4 to 2 downshift(S130). A power-on 4 to 2 downshift control duty signal is output from the control unit to a driving unit in changing into the power-on 4 to 2 downshift(S135). Driving experience is improved, and durability is increased.

Description

Shift Control 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 gradually coupled to the subordinate gear by the driven gear coupled to 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 the data to change 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.

Therefore, the object of the present invention was devised to solve the above problems, and according to the driver's intention to decelerate during the 4th speed, the driver's will is accelerated while the shifting stage shifts to the power-off manual 4 → 2 downshift. When the accelerator pedal is changed and the 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. By turning the power-off manual 4 to 2 downshift, the shift-up condition is prevented even if the shifting state is changed by the driver's acceleration will, so that the durability and shifting feeling of the automatic transmission can be improved and the riding comfort is improved. It is an object of the present invention to provide a shift control apparatus and a method of an automatic transmission having an effect that can be achieved.

The present invention for achieving the above object,

When the driver shifts the driving speed of the vehicle equipped with the vehicle's transmission at 4 speeds and the driver steps out of the accelerator pedal with deceleration in accordance with the condition, the control means of the shift control device shifts the power-off manual 4 to 2 down. Determining whether a shift control signal is output;

Outputting a power-off manual 4-to-2-down shift shift control duo signal stored in a memory when the power-off manual 4 to 2-down shift shift control signal is output;

The power-off manual 4 → 2 downshift shift control signal is output, and when the driver presses the accelerator pedal with the intention of accelerating during the shift control, the control means sets the opening amount (TPS) of the throttle valve to the lowest setting reference value. Determining whether it has been changed as described above;

When the driver presses the accelerator pedal with the will to accelerate and the opening amount value TPS of the throttle valve is changed to the set reference value or more, the control means changes the opening amount TTP of the throttle valve to shift the power-off manual 4 to 2 down. Determining whether the power state is changed from a power-off to a power-on 4 → 2 downshift in a set section A during shifting;

When the value of the opening amount TPS of the throttle valve is changed in the A section 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. 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 to which the present invention is applied;

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 that can specifically achieve and realize the above objects are described in detail with reference to the accompanying drawings.

As shown in FIG. 5, the automatic transmission shift control apparatus to which the present invention is applied includes: 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; In response to the electric signal output from the vehicle driving state sensing means 10 being read and the shift stage performing a power-off manual 4 → 2 downshift, the driver's will is changed to an acceleration will and the accelerator pedal is pressed. A control means 20 for outputting a corresponding shift control signal by setting the shift state differently according to the point of time when the throttle opening degree, which is the stepped time of the accelerator pedal, is changed to a set value or more, and outputted from the control means and 20 It consists of a driving means 30 for receiving the duty control signal to perform the shift control.

In the shift control apparatus, the vehicle driving detecting means 10 detects the degree of opening of the throttle valve whose opening state is variable in conjunction with the pupil state of the accelerator pedal and outputs a corresponding signal to the throttle valve opening degree detecting unit 11. ), A vehicle speed detecting unit 12 that detects the output shaft rotational speed of the vehicle and outputs a corresponding new hole corresponding to the traveling speed of the vehicle, and when the gear stage is changed according to the throttle valve opening amount and the vehicle speed, A shift stage sensing unit 13 for detecting a variable state and outputting a corresponding signal, and a turbine shaft rotation speed sensing unit for sensing a rotational speed of a turbine shaft of a torque converter connected to an input shaft of a transmission and outputting a corresponding signal ( 14) and an engine speed detection unit 15 for detecting a rotation speed of the crankshaft which is variable according to the operating state of the engine and outputting a corresponding signal.

Power-off manual 4 to 2 downshift of the automatic transmission made by the above configuration When the state of the power during shifting is changed to the on state, see Figs. 1, 3, 4, 6 and the like attached to the shift control method. An example will be described.

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

When the power-off manual 4 → 2 downshift shift control signal is output in step S100, the control means 20 controls the power-off manual 4 → 2 downshift shift control duty stored in the memory as shown in FIG. The signal is output to the driving means 30 (S110).

In step S110, the power-off manual 4 → 2 downshift shift control signal is output to the driving means 30, and when the driver presses the accelerator pedal with the willingness while performing the shift control, the control means 20 throttles. It is determined whether or not the valve has been changed to 0.684 (v) or more, which is the lowest reference value of the opening amount value TPS of the valve (S120).

When the opening amount TPS of the throttle valve is less than the reference value 0.684 (v) in step S120, the shift control by the power-off manual 4 → 2 down shift shift control duty signal is continued in step S110.

If it is determined in step S120 that the driver presses the accelerator pedal with the will to accelerate, and the opening amount value TPS of the throttle valve is determined to be greater than or equal to 0.684 (v), the set reference value, the control means 20 opens the throttle valve. The timing at which the measurement value TPS is changed is determined.

That is, the control means 20 changes the value of the throttle valve opening amount TPS shown by the dashed line in FIG. 1 attached by the driver's accelerator pedal in the section A set during the power-off manual 4 to 2 downshift. It is determined whether the state of the power is changed from the power off to the power on 4 → 2 down shift (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 state of power 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 coupled to the release side of the automatic transmission as shown in FIG. Each output to the drive means 30 (S135).

However, if the value of the throttle valve opening amount TPS shown by the dashed line in FIG. 1 attached by the driver's accelerator pedal operation in step S130 is not varied in the section A during the power-off manual 4 to 2 downshift shifting The control unit 20 changes the power state at the power-off state by changing the value of the throttle valve opening amount TPS shown in FIG. 3 in the set section B during the power-off manual 4 to 2 downshift shifting. It is determined whether the shift is changed from the on 4 to the down shift (S140).

Thus, when it is determined in step S140 that the value of the throttle valve opening amount TPS is changed in the section B during the power-off manual 4 → 2 downshift shifting, the power state is changed from the power on 4 → 2 downshift, the control means. 20, the drive means 30 drives the duty signal of the power-off manual 4 → 2 downshift shift control A1 section stored in the memory to control the PCSV-A which is the release side of the automatic transmission as shown in FIG. ), And the duty value of section B of the power-off manual 4 → 2 down-shift shift control stored in memory to control the PCSV-B on the coupling side is corrected to the calculated value by adding the set duty value Δd. In operation S145, the duty cycle according to the corrected duty value is output to the driving means 30 to control the set shift control section C.

However, as shown by the solid line in FIG. 1, the state of the power is changed by the value of the throttle valve opening amount TPS in the section C during shifting of the power-off manual 4 → 2 downshift. In this case, the condition determination of steps S130 and 140 is not simultaneously established.

When the condition determination of steps S130 and 140 is not established at the same time, the control means 20 controls the power-on stored in the memory to control the PCSV-A which is the release side of the automatic transmission as in the conventional art shown in FIG. 4 → 2 Down Shift Shift Control C Power Off Manual 4 → 2 Down Shift Shift Control C outputted to the duty signal driving means 30 for controlling section A1 and stored in a memory for controlling the PCSV-B on the coupling side. The duty signal for controlling the section is output to the driving means 30 (S150).

However, even when the vehicle is driving at four speeds, if the power-off manual 4 → 2 downshift shift request signal is not output at the shift stage, the determination condition of step S100 is not satisfied, or the duty control in step S135, S145, or S150 is performed. The control means 20 returns to the main routine.

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, in 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 in the fourth speed driving, the driver's will is changed to the acceleration will, and the accelerator pedal is pressed. According to the time when the accelerator pedal is pressed, that is, when the throttle opening degree is changed above 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 prevents run-up shock during shifting even if the shifting state is changed by the driver's acceleration will during 2-down shift shifting, so that the durability and shifting feeling of the automatic transmission can be improved and the riding comfort can be improved. A shift control apparatus and a method of a transmission can be provided.

Claims (4)

When the driver withdraws his foot from the accelerator pedal with deceleration in the state that the vehicle is equipped with an automatic transmission running at four speeds, the control means of the shift control device shifts the power-off manual 4 to 2 downshift. Determining whether a control signal is output; When the power-off manual 4 → 2 downshift shift control signal is output, outputting a power-off manual 4 → 2 downshift shift control signal stored in a memory; When the power-off manual 4 → 2 downshift shift control signal is output and the driver presses the accelerator pedal with the will to accelerate during the shift control, the control means sets the opening amount (TPS) of the throttle valve to the lowest setting reference value. Determining whether it is variable as above; When the driver presses the accelerator pedal with the will to accelerate and the opening amount value TPS of the throttle valve is changed to the set reference value or more, the control means changes the opening amount TTP of the throttle valve to shift the power-off manual 4 to 2 down. Determining whether the power state is changed from a power-off to a power-on 4 → 2 downshift in a set section A during shifting; When the opening amount TPS of the throttle valve is variable and the state of the power during the power-off manual shift 4 → 2 downshift is changed from the power on 4 → 2 downshift in the section A, the control means releases the automatic transmission. And outputting a power-on 4 → 2 downshift shift control duty signal stored in a memory to control the PCSV-A on the side and the PCSV-B on the side of the coupling. The method according to claim 1, 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 variable in the section B set during the power-off manual 4 → 2 downshift shifting Determining whether the state of power is changed from a power-off to a power-on 4 → 2 down shift; The release side of the automatic transmission when the value of the opening amount TPS of the throttle valve is varied in the section B during the power-off manual 4 → 2 downshift shifting and the state of the power is changed from power on 4 → 2 downshift. Power-off manual stored in memory to control PCSV-A is outputted in the A1 section of the power-off manual 4 → 2 downshift shifting control section, and the power-off stored in memory to control the PCSV-B as the coupling side. Compensate the duty value of the manual 4 to 2 downshift shift control section B to a value calculated by adding the set duty value Δd, and then output the corresponding duty signal to set the C section of the power off manual 4 to 2 downshift shift control section B. Shift control method of the automatic transmission made, including starting to control. The value of the throttle valve opening amount TPS of the power-off manual 4 → when the value of the opening amount TPS of the throttle valve is not varied in the section B during the power-down manual shifting. Determining whether the state of the power is changed in the power-on 4 → 2 downshift shift control signal during the period C during shifting by 2 downshift; When the value TTP of the throttle valve opening amount is varied in the section C 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. Power-on manual stored in memory to control PCSV-A outputs the duty signal for controlling the power-on 4 → 2 down-shift shift control section A1 stored in the memory to control PCSV-A, and 4 And a step of outputting a duty signal for controlling the section C of the two-down shift shift control section. The throttle opening degree value TPS of the throttle valve is changed to be equal to or greater than the set reference value even when the driver presses the accelerator pedal with the will to accelerate. And continuously outputting a power-off manual 4 → 2 downshift shift control signal stored in the memory until the shift control signal is stored.

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