KR100325216B1 - Shift controlling methode for automatic transmission of vehicle - Google Patents

Abstract

When a power on down shift shifting control occurs during the upshift shifting in the vehicle in which the vehicle is driven, for the purpose of performing shifting immediately after the power on down shift occurs;

outputting a predetermined n + 1 speed duty control signal to perform a shift when an n → n + 1 speed up shift shift signal is applied while driving at n speed; Comparing and determining whether a power-on-down shift signal is applied during n → n + 1 upshift in this step; When it is determined that the power on down shift signal is applied in this step, the power on down shift signal is determined to be compared with the skip shift signal, and when the power on down shift signal is not applied, n + 1 speed up shift control Performing a step; In the above step, when the power on down shift signal is a skip shift signal, power on n + 1 → n−1 may be skipped down, and when the power on down shift signal is not a skip shift signal, power on n + 1 → n-speed downshift control is performed, thereby improving shift response and shifting feeling.

Description

SHIFT CONTROLLING METHODE FOR AUTOMATIC TRANSMISSION OF VEHICLE}

The present invention relates to an automatic transmission for a vehicle, and more particularly, to a power on down shift shift control method during an upshift shift in a driving vehicle.

For example, the automatic transmission applied to a vehicle is controlled by the shift control device controlling a plurality of solenoid valves to control hydraulic pressure according to the driving speed of the vehicle, the opening ratio of the throttle valve, and various detection conditions, thereby operating the gear shift of the target shift stage. To make the shift.

In other words, when the driver changes the select lever to the desired shift range, the manual valve port is changed and the hydraulic pressure supplied from the oil pump is selectively operated according to the duty control of the solenoid valve to shift the operating elements of the gear shift mechanism. Let this be done.

The automatic transmission operated according to such an operating source has a friction element that is deactivated in the operating state and a friction element that is converted from the deactivated state when the shift to the corresponding target shift stage is performed. The friction elements are 1st speed and R FP and the first friction element C1 operating in the N, P range, the second friction element C2 operating in the 2nd and 5th speeds, 1st, 2nd, 3rd. Third friction element C3 operating in speeds and fourth speeds, fourth friction element C4 operating in speeds three, four and five speeds, one speed, two speeds, three speeds, R ranges and N, The fifth friction element C5 operates in the P range, the sixth friction element C6 operates in the fourth and fifth speeds, and the seventh friction element C7 operates in the R range.

In the automatic transmission vehicle having the friction elements, when the power on down shift shift occurs during the up shift shift as shown in FIG. 4, the up shift shift is completed and the power on down shift shift is performed. Was performed.

However, the above-described conventional technology, when the power on down shift shift is made during the up shift shift, completes the up shift shift and performs the power on down shift shift, thereby performing shift control contrary to the driver's intention to achieve shift responsiveness and There is a problem that worsens the feeling of shifting.

Accordingly, an object of the present invention for solving the above problems is, if the power-on-down shift shifting control occurs during the upshift shifting in the driving vehicle, the shift is performed immediately after the power-on-down shift occurs to improve shift response and shifting feeling It is to provide a shift control method of a vehicle automatic transmission that can be made.

1 is a block diagram of a shift control apparatus of an automatic transmission vehicle for a vehicle applied to the present invention.

2 is a flowchart illustrating a shift control method of an automatic transmission for a vehicle according to the present invention;

3 is a shift control duty pattern diagram applied to the present invention.

4 is a conventional shift control duty pattern diagram.

According to an aspect of the present invention, there is provided a method of performing shifting by outputting a preset n + 1 speed duty control signal when an n → n + 1 speed upshift shifting signal is applied while driving n speeds; Comparing and determining whether a power-on-down shift signal is applied during n → n + 1 upshift in this step; When it is determined that the power on down shift signal is applied in this step, the power on down shift signal is determined to be compared with the skip shift signal, and when the power on down shift signal is not applied, n + 1 speed up shift control Performing a step; In the above step, when the power on down shift signal is a skip shift signal, power on n + 1 → n−1 may be skipped down, and when the power on down shift signal is not a skip shift signal, power on n + 1 → n-speed downshift control.

Hereinafter, a shift control method of an automatic transmission for a vehicle will be described in detail with reference to a power on 3 → 2 downshift of 2 → 3 upshifts, based on the accompanying drawings of a preferred embodiment of the present invention which can realize the above object. .

1 is a block diagram illustrating a configuration of a feedback control device for an automatic transmission for a vehicle according to the present invention, wherein a throttle valve opening amount 11, an output rotational speed 12, an accelerator pedal switch 13 varying according to a driving state of a vehicle, Vehicle running state detecting means 10 for detecting changes in oil temperature 14, shift lever position 15, engine speed 16, and turbine speed detecting unit 17, and the vehicle running state detecting means 10. When the 3-speed upshift shifting signal is applied during the 2-speed driving by receiving the vehicle driving state signal detected at, the shifting is performed by outputting a preset 2 → 3 upshift control signal, and power-on during the 2 → 3upshift shifting. When the down shift signal is applied, it is determined whether the power on down shift signal is a skip down signal. When the power on down shift signal is a skip down signal, power on 3 → 1 skip down shift control is performed. If the previous signal is not a skip down signal, the shift stage may be set by the shift control means 20 performing power on 3 to 2 downshift control and a predetermined duty control signal output from the shift control means 20. It consists of the drive means 30 which performs a shift to a gear shift stage.

A shift control method of an automatic transmission for a vehicle having the above configuration will be described in detail with reference to the accompanying drawings.

2 is a flowchart illustrating an operation of a shift control method of an automatic transmission according to the present invention, and FIG. 3 is a duty pattern diagram applied to the present invention.

As shown in FIG. 2, in a vehicle equipped with an automatic transmission in which a shift stage is automatically shifted according to a driver's operation state, when a 2 → 3 upshift shift control signal is applied during 2-speed driving, control is performed by a preset program. The shift control means 20 outputs a predetermined control signal to the vehicle driving state detecting means 10 (S100).

Accordingly, the vehicle driving state detecting means 10 includes a throttle valve opening degree detection unit 11, an output rotational speed detection unit 12, an accelerator pedal switch detection unit 13, an oil temperature detection unit 14, and a shift lever position detection unit ( 15), the throttle valve opening amount Th detected from the engine speed detection unit 16 and the turbine speed detection unit 17, the output side rotation speed 2o, the on / off state of the accelerator pedal switch, the oil temperature (ATF), The detection value of the shift lever position state, the engine speed 2e, and the turbine speed Nt is transmitted to the shift control means 20.

Accordingly, the shift control means 20 is the throttle valve opening amount Th, the output side rotation speed 2o, the on / off state of the accelerator pedal switch, the oil temperature ATF, input from the vehicle driving state detection means 10, The detection value of the shift lever position state, the engine speed 2e, and the turbine speed is applied and read, and it is determined whether the 2 → 3 upshift shift signal is applied (S110).

In the case of the 2 → 3 upshift shifting signal, the shift control means 20 performs a preset 2 → 3 upshift shifting control as shown in FIG. 3, outputs a 2 speed release duty signal, and then Tr. When time elapses, the third speed combined duty control signal is output at 100% (S120).

In the above-described coupling side control, the shift control is performed in a control mode determined according to the turbine speed and the power state by a predetermined program.

Therefore, after the shift control means 20 maintains 100% for Ta time (S130), when the Ta time elapses, the shift control means 20 corrects the 100% duty to a predetermined reduction correction duty, and then the duty at an α% / sec rising slope. Outputs (S140).

If the power-on 3 → 2 downshift shifting signal is applied while outputting the three-speed combined duty at α% / sec rising slope, the shift control means 20 outputs the three-speed release duty at 100% (S160). .

Subsequently, the shift control means 20 maintains the output 3 speed release duty 100% even in the Tf time period (S170), and then controls the 3 speed release duty to 0% (S180).

The 3-speed release duty controlled to 0% is maintained for Tf_Dr (S190).

As shown in Fig. 3, the duty holding time Tf_Dr is the piston stroke value Ps on the coupling side at power on up n > Calculate.

In the above, the piston stroke value Ps is Tf + Sum (Duty_real / 100)

The above condition is Tf_Dr> Oms.

Subsequently, when Tf_Dr for maintaining the duty at 0% has elapsed, the shift control means 20 outputs the 3-speed release duty at Dr% and then holds it for a predetermined second predetermined time (eg, 64 ms) (S200). ).

When the predetermined second setting time, which is the duty Dr holding time, elapses, the shift control means 20 performs a preset feedback duty control (S210), and when the feedback duty control ends, terminates the third speed release duty control. (S220).

As described above, in the shift control method of the automatic transmission for a vehicle according to the present invention, when a power-on-down shift shifting control occurs during an upshift shift in a driving vehicle, the shifting response and shifting feeling are performed by shifting immediately after the power-on-down shift occurs. Can improve.

Claims (6)

outputting a predetermined n + 1 speed duty control signal to perform a shift when an n → n + 1 speed up shift shift signal is applied while driving at n speed; Comparing and determining whether a power-on-down shift signal is applied during n → n + 1 upshift in this step; When it is determined that the power on down shift signal is applied in this step, the power on down shift signal is determined to be compared with the skip shift signal, and when the power on down shift signal is not applied, n + 1 speed up shift control Performing a step; In the above step, when the power on down shift signal is a skip shift signal, power on n + 1 → n−1 may be skipped down, and when the power on down shift signal is not a skip shift signal, power on n + 1 → n-speed downshift control, the shift control method for an automatic transmission for a vehicle, characterized in that. The method of claim 1, wherein the n + 1 speed up shift control comprises: outputting 100% of the coupling side duty and maintaining a predetermined time; And if the duty holding time elapses in the step, decreases and corrects the duty ratio n + 1 to a predetermined value, and outputs it at an α% / sec rising inclination. The method of claim 1, wherein the power-on n + 1 → n-speed downshift control outputs 100% of the n + 1-speed release duty, maintains it for a predetermined first time (Tf), and then performs the predetermined first time. When the elapsed time elapses, the n + 1 speed release duty is output 0% and then maintained for a predetermined second time Tf_Dr. When the predetermined second time elapses, the n + 1 speed duty duty Dr% is output after predetermined time. Maintaining a first set value of; And if the predetermined first setting value of the duty Dr% holding time elapses in the step, performing feedback duty control and ending n + 1 speed release duty control. The piston stroking value and the power on up n > n + 1 in accordance with claim 3, wherein the predetermined second time is converted into the sum of the duty output during the upshift coupling control from the upshift to the power on downshift. A shift control method for an automatic transmission for a vehicle, characterized by outputting at a difference in the piston stroking value on the coupling side. 4. The shift control method of claim 3, wherein the first predetermined value is 64 ms. 3. The shift control method of claim 2, wherein the coupling side control performs shift control in a control mode determined according to a turbine speed and a power state by a predetermined program.