KR100559338B1 - A total control apparatus of automatic transmission on vehicle and method thereof - Google Patents

Abstract

In a vehicle equipped with an automatic transmission, when a power on up shift is shifted, torque reduction control by applying independent variable values for each shift stage and acceleration pedal displacement is to maintain a stable shift.

A process of determining whether a shift request is detected by a shift control unit when a shift stage is selected and driving, a process of determining a target shift stage from a set map table, and then determining whether a total control condition is satisfied, when the shift control request is detected; If the control condition is not satisfied, the shift to the target shift stage is performed without performing the torque reduction control, and if the total control condition is satisfied, the independent torque reduction control variable is extracted, and the engine output torque to which the extracted torque reduction control variable is applied. Performing the reduction control and restoring the torque reduction control when the shift completion is determined.

Automatic Transmission, Total Control, Torque Reduction Control, Control Variables

Description

Total control device and method of automatic transmission vehicle {A TOTAL CONTROL APPARATUS OF AUTOMATIC TRANSMISSION ON VEHICLE AND METHOD THEREOF}

1 is a block diagram of a total control device of an automatic transmission vehicle according to the present invention.

2 is a flow chart of one embodiment for executing summation control in an automatic transmission vehicle in accordance with the present invention.

The present invention relates to a vehicle equipped with an automatic transmission, and more particularly, to stably change the transmission feeling by applying a variable value independent for each shift stage / acceleration pedal displacement when a power on up shift is performed. A total control apparatus and method for an automatic transmission vehicle for maintaining.

In general, the automatic transmission shifts the upshift and the downshift in a shift pattern set according to the opening speed of the throttle valve operated in conjunction with the vehicle speed and the accelerator pedal of the driven vehicle. During the shift to the target shift stage set in exchange with the engine control unit, the engine control unit controls the ignition timing to control torque reduction to shorten the shift time to the target shift stage and execute a total control to improve the shift feeling. do.

That is, when the shift request of the power-on-up shift is detected, the shift control means sets the target shift stage and then adjusts the shift control pressure by duty control through the actuator, and the engagement element and the friction element by the shift control pressure. Is reached, the shift control means transmits the torque reduction signal set to the engine control means so that the engine control means executes the torque reduction control while shifting is progressed to the perceptual control of the ignition timing. Let this be improved.

As described above, when the shift control means detects the shift completion in the state in which the torque reduction control is executed by the perception control of the ignition timing, the shift control means requests the engine control means to terminate the torque reduction control, thereby resetting the ignition timing. Return to the state of.

As described above, the total control method of the conventional automatic transmission which executes torque reduction control through linkage between the shift control means and the engine control means has one variable for torque reduction control including a shift start point, a shift completion point, and a torque reduction amount. Since it is applied as a value of, there is a disadvantage that the active control according to the displacement of the shift stage / acceleration pedal cannot be performed.

That is, as the same torque reduction control variable is applied to all shift stages regardless of the displacement of the accelerator pedal, there is a disadvantage in that a stable shift feeling is not provided.

The present invention has been invented to solve the above problems, the object of which is independent for each shift stage / vehicle speed / acceleration pedal displacement during shift of the power-up up in the total control associated with the shift control means and the engine control means Torque reduction control using variable values is designed to reduce the speed and speed of transmission.

The present invention for achieving the above object is an activator switch for detecting the position of the shift lever and the throttle detector for detecting the change in the opening degree of the throttle valve, the vehicle speed detection for detecting the running vehicle speed, the oil temperature for detecting the temperature of the transmission oil In the automatic transmission including a detection unit,

A memory unit configured to set a shift pattern map table according to a vehicle speed and an opening ratio of a throttle valve, and an independent torque reduction parameter table according to a target shift stage, a vehicle speed, and a throttle valve opening ratio; A shift control unit for extracting a variable for torque reduction control according to a target shift stage / vehicle speed / throttle opening degree change rate from the memory unit when the shift request of the power on up shift is detected and the total control condition is satisfied; ; And an engine control unit configured to apply pertinent variables according to a request of the shift control unit to perform perceptual control of the ignition timing.

The present invention also provides a method of determining whether a shift request is detected by a shift controller in a state in which a shift stage is selected and driving; Determining a target speed change stage from a set map table and determining whether a total control condition is satisfied when a shift control request is detected; If the total control condition is not satisfied, performing the shift of the target shift stage without performing the torque reduction control, and extracting the independent torque reduction control variable if the total control condition is satisfied; It provides a total control method of the automatic transmission vehicle comprising the step of performing the control of reducing the engine output torque to which the extracted torque reduction control variable is applied, and restoring the torque reduction control when the shift completion is determined. .

The total control condition in the above is an automatic transmission vehicle characterized in that the shift request of the power on up shift, the oil temperature is above the set reference temperature, the condition that the throttle valve is opened by a certain percentage or more in a state of maintaining a certain opening degree or more. Provides a total control method.

The torque reduction control variable for the total control in the above provides a total control method of the automatic transmission vehicle, characterized in that independently set according to the opening ratio of each shift stage / vehicle speed / throttle valve.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As can be seen in Figure 1, the total control apparatus of the automatic transmission vehicle according to the present invention is an inhibitor switch 10, the throttle detector 20, the vehicle speed detector 30, oil temperature detector 40, the shift control unit ( 50), a memory unit 60, an engine control unit 70, and an actuator 80.

The inhibitor switch 10 detects the selection of the shift range by the shift lever and outputs information about it.

The throttle detector 20 detects a change in the opening rate of the throttle valve which is opened and closed by the accelerator pedal and outputs information on the change in the opening rate.

The vehicle speed detection unit 30 detects the current traveling vehicle speed from the rotation speed of the transfer driven gear and outputs information on it.

The oil temperature detection unit 40 detects the temperature of the transmission oil forming a driving pressure in the engagement element and the friction element in the automatic transmission in accordance with the duty control signal and outputs information on the same.

The shift control unit 50 controls the line pressure formation in each of the engagement element and the friction element in accordance with the selection information of the shift stage range detected from the inhibitor switch 10, and the shift pattern set according to the vehicle speed and the opening degree of the throttle valve. The duty pressure is controlled to extract the target shift stage from the map so that shift synchronization to the corresponding shift stage is achieved, and the control of the duty pressure is compensated according to the condition of the oil temperature.

In addition, when the change in the opening degree of the throttle valve is a shift request of the power-on-up shift, the engine control unit 70 extracts a variable for torque reduction control according to the target shift stage / throttle opening change rate in order to shorten the shifting time and improve the shifting feeling. Request torque reduction control.

The memory unit 60 includes a shift pattern map table according to the vehicle speed and the opening ratio of the throttle valve and an independent torque reduction parameter table according to the target shift stage / throttle valve opening ratio as shown in Table 1 below.

Ignition time (angle: TDC 0 ℃) +10 +5 0 -4 -6 -8 -10 -15 Demand (variable) One 2 3 4 5 6 7 8

In Table 1, '+' means the advance of the ignition timing, '-' means the perception of the ignition timing.

The engine control unit 70 shortens the shift time to the target shift stage by controlling the perception of the ignition timing according to the torque reduction control signal required for shifting the power-on up shift from the shift control unit 50, and changes the shock. To reduce the shift speed.

The actuator 80 drives the hydraulic pressure supplied to each engagement element and the friction element according to the control signal applied from the shift control unit 50 so as to achieve a transmission to the target shift stage.

Referring to FIG. 2, an operation of executing total control through the present invention including the function described above is as follows.

In a state where an arbitrary shift stage is selected and driven (S101), the shift control unit 50 detects the current traveling vehicle speed from the vehicle speed detector 30 (S102), and detects the rate of change of the opening degree of the throttle valve from the throttle detector 20. (S103) The current oil temperature state is detected from the oil temperature detection unit 40 (S104).

As described above, it is determined whether the change of the vehicle speed and the throttle valve which are traveling while detecting the state of the vehicle is detected as the shift request (S105).

When the shift request is detected, the target shift stage, which is the next shift stage, is determined by analyzing the change of the vehicle speed and the opening ratio of the throttle valve according to the set shift pattern map, and then through the duty control for synchronizing the target shift stage through the actuator 80, Hydraulic pressure is supplied to the engagement element and the friction element to proceed the shift (S106).

Thereafter, it is determined whether the condition of the total control is satisfied when the shift request is made to the target shift stage (S107).

The condition of the total control is a shift request of the power on up shift, and the reference temperature at which the oil temperature is set is changed to a constant opening rate or more (about 15%) while the throttle valve is maintained above the predetermined opening rate (about 70%). It is a condition to maintain abnormality.

If the total control condition is not satisfied in the above, normal control to the target shift stage is executed without performing torque reduction control, and if the total control condition is satisfied, each target shift stage / differential speed / throttle opening degree is changed in the memory unit 60. In step S108, variables for independent torque reduction control are extracted from the independently set variable table.

For example, as can be seen in Table 1, when the ignition timing advance for torque reduction control is '+10', the torque demand variable is extracted as '1', and the ignition timing advance is '-15'. If is the torque request variable is extracted as '8'.

When the variable of the independent torque reduction control according to the target shift stage / vehicle speed / throttle opening degree is extracted as described above, the shift control unit 50 reaches the actual shift start point by supplying the hydraulic pressure by the duty control. The reduction control variable value is applied to the engine control unit 70 to request torque reduction control.

Therefore, the engine control unit 70 executes the torque reduction control by retarding the ignition timing according to the torque reduction variable applied from the shift control unit 50, thereby shortening the shift time to the target shift stage, and shifting shock through torque reduction. Is not generated (S109).

In the process of performing the torque reduction control through the above-described process, the shift control unit 50 determines whether the shift completion is detected (S110), and when the shift completion is detected, requests the engine control unit 70 to release the torque reduction control. In this way, the engine control unit 70 allows the ignition timing to be restored (S111).

As described above, the present invention performs torque reduction control by interlocking with the engine control means in order to shorten the shift time and improve the shifting feeling according to the shift request of the power-on-up shift in the automatic transmission. By applying independent variable values according to the opening rate of the vehicle speed / throttle valve, a more stable shifting feeling is provided.

Claims (4)

An automatic transmission including an inhibitor switch for detecting a position of a shift lever, a throttle detector for detecting a change in the opening ratio of a throttle valve, a vehicle speed detector for detecting a traveling vehicle speed, and an oil temperature detector for detecting a temperature of a transmission oil, A memory unit configured to set a shift pattern map table according to a vehicle speed and an opening ratio of a throttle valve, and an independent torque reduction parameter table according to a target shift stage, a vehicle speed, and a throttle valve opening ratio; A shift control unit for extracting a variable for torque reduction control according to a target shift stage / vehicle speed / throttle opening degree change rate from the memory unit when the shift request of the power on up shift is detected and the total control condition is satisfied; ; And an engine controller configured to perform perceptual control of the ignition timing by applying a corresponding variable in response to a request of the shift controller. Determining whether a shift request is detected by a shift control unit while a shift stage is selected and driving; Determining a target speed change stage from a set map table and determining whether a total control condition is satisfied when a shift control request is detected; If the total control condition is not satisfied, performing the shift to the target shift stage without performing the torque reduction control, and extracting the independent torque reduction control variable if the total control condition is satisfied; And performing the reduction control of the engine output torque to which the extracted torque reduction control variable is applied, and restoring the torque reduction control when the shift completion is determined. The method of claim 2, The sum total control condition is a shift request of the power-on up shift, the oil temperature is above the set reference temperature, and the condition that the throttle valve is opened by a certain percentage or more in a state of maintaining the predetermined opening degree or more. Total control method. The method of claim 2, The torque reduction control variable for the total control is set independently of the automatic transmission vehicle, characterized in that independently set according to the opening ratio of each shift stage / vehicle speed / throttle valve.

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