KR100250313B1 - Shift controlling device and method in transmission using engine torque - Google Patents

Abstract

PURPOSE: A gearshift controller and method the same are provided to control gearshift operation by the power on/off condition determined by the driving condition before actual gearshift operation is done and by the engine torque condition after the actual gearshift operation is done to execute gearshift operation appropriate to the driving condition of a car. CONSTITUTION: A gearshift controller comprises an engine rotation frequency detecting device(11), an output shaft rotation frequency detecting device(12), a throttle valve opening sensor(13), a gearshift controller(2) and a hydraulic pressure controller(3). The gearshift controller(2) is connected with the sensors(11, 12, 13), determines driving range of a car if gearshift operation occurs, determines whether an actual gearshift operation has been started if the determined driving range is changed from power on range to power off range, outputs control signal to execute gearshift control by the change of the engine torque independently of determined driving range if the actual driving operation has been started and outputs control signal controlling gearshift operation to the objective gearshift step according to the driving range determined most recently if the actual gearshift operation does not occur. The hydraulic pressure controller(3) generates control pressure to control an automatic transmission by the duty rate of the control signal outputted by the gearshift controller(2).

Description

Shift control device using engine torque and method

1 is a shift pattern diagram according to a conventional power on / off state,

2 is a block diagram of a shift control apparatus using an engine torque according to an exemplary embodiment of the present invention.

3 is an operation flowchart of a shift control method using engine torque according to an exemplary embodiment of the present invention.

The present invention relates to a shift control apparatus and a method thereof. More specifically, when the shift operation to the target shift stage is performed, the shift operation is controlled to the currently determined power on / off state until the actual shift operation is performed. The present invention relates to a shift control apparatus and a method using an engine torque that performs shift control according to a torque state of an engine when an actual shift is started.

In general, a vehicle equipped with an automatic transmission controls the hydraulic pressure within a shift range set according to the driving speed of the vehicle so that the shift gear of the target shift stage may be automatically operated.

Therefore, the torque converter is operated according to the output power of the engine to control the rotational force of the fluid, and according to the control signal applied from the shift control device so that the shift gear according to the operating state of the vehicle can be operated. Hydraulic pressure acts on the valve to allow shifting.

Therefore, a vehicle equipped with an automatic transmission in which the operating state is controlled according to the hydraulic pressure does not require the operation of a clutch pedal that shuts off power to the engine in order to change the operation state other than the corresponding gear. Fatigue can be reduced, and an engine stall is not generated due to a malfunction of the driver or an immature driving during driving, so that even a beginner can easily operate a driving operation.

Therefore, the automatic transmission receives a fluid pressure from the oil pump by changing the port according to the selected position of the driver's shift lever, and the operating state of the hydraulic valve is changed by the fluid pressure so that any one of the gear stages of the transmission gear mechanism is shifted. Controls the operating state of the hydraulically actuated friction element for selecting stages.

The action of the planetary gear arrangement is switched in accordance with the selective operation of the friction element consisting of a clutch or brake, which is then transmitted to the drive gear after an appropriate transmission ratio is made.

When the shifted power is transmitted to the drive gear, the shifted power is transmitted to the driven gear geared to the longitudinal reduction gear by the driven gear geared to the drive gear, thereby controlling the rotational movement of the wheel.

In order to determine the target speed change stage according to the driving state of the vehicle as described above, the shift pattern is already set according to the opening amount of the throttle valve which changes according to the operation degree of the accelerator pedal and the driving speed of the vehicle.

Therefore, the target shift stage is determined according to the set shift pattern, and the shift operation to the determined target shift stage can be executed.

When the shifting operation to the target shift stage according to the driving state of the vehicle is performed as described above, the shifting operation to the target shift stage depends on the power on / off state set according to the engine speed and the opening degree of the throttle valve. Change.

Therefore, when the same downshift or upshift operation is made, the determined driving state of the vehicle changes the duty ratio of the control signal for controlling the oil pressure according to the power on or off state.

However, as shown in FIG. 1, the power on / off state set according to the engine speed and the opening amount of the throttle valve is different from the data set according to the mathematical value and the power on / off state generated in the actual vehicle. Many differences occur, so that the control operation of the automatic transmission according to the driving state of the vehicle is not made, thereby reducing the driving performance of the vehicle and reducing the output efficiency of the engine.

Therefore, an object of the present invention is to solve the above-described problems, and before the actual shift operation is performed, the shift operation is controlled according to the power on / off state determined according to the driving state, and the actual shift operation is performed. The present invention provides a shift control apparatus using the engine torque and a method for controlling a shift operation according to a torque state so that an appropriate shift operation according to a driving state of a vehicle can be performed.

As a means for achieving the above object, the configuration of the present invention, the engine speed detection means for changing the state of the electrical signal output in accordance with the rotational speed of the engine; Output shaft rotation speed detecting means for changing the state of the electrical signal output in accordance with the rotation speed of the output shaft of the automatic transmission; Throttle valve opening degree detecting means for changing the state of an electrical signal output in accordance with the opening state of the throttle valve whose opening amount changes according to the operation of the accelerator pedal; When the driving state of the vehicle is connected to the sensing means and the shifting operation occurs, the driving region of the vehicle is determined, and when the determined driving region is changed from the power on region to the off region, it is determined whether the actual shifting operation is started. When the actual shift operation is started, a control signal for shift control is output according to the change in the torque of the engine regardless of the determined travel range, and when the actual shift operation does not occur, the control signal is output to the most recently determined driving range. Shift control means for outputting a control signal for controlling the shift operation to the target shift stage; It includes a hydraulic control device for generating a control pressure for controlling the automatic transmission by changing the operating state in accordance with the duty ratio of the control signal output from the shift control means.

Another configuration of the present invention for achieving the above object, by reading the signal output from the engine speed detection means, the output shaft rotation speed detection means and the throttle valve opening degree detection means, to determine the target gear shift stage and the driving area of the vehicle Determining whether the target shift stage has been changed; Outputting a shift control signal to start a shift operation when the target shift stage is changed, and then reading a corresponding detection signal to determine a driving area; Determining whether the actual shifting operation is started when the determined driving area is changed from the power on area to the off area; Controlling the shifting operation by using the engine output torque according to the driving state of the vehicle when the actual shifting operation is started, and controlling the shifting operation according to the determined driving area when the actual shifting operation is not started. .

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

Referring to FIG. 2, a configuration according to an exemplary embodiment of the present invention will be described. The engine rotation speed detection unit 11 and the output shaft of the automatic transmission in which the state of the electric signal outputted according to the rotation speed of the engine is changed are described. The output shaft rotation speed detection part 12 which changes the state of the electrical signal output according to the speed, and the throttle valve which changes the state of the electrical signal output according to the opening state of the throttle valve whose opening amount changes with the operation of an accelerator pedal. A shift control unit connected to the opening degree detection unit 13 and the detection units 11 to 13 and outputting a control signal for an appropriate shift operation according to the driving state of the vehicle determined according to the state of the output detection signal; 2) and the hydraulic control solenoid to change the operation state according to the state of the control signal output from the shift control unit 2 so that the shift operation to the target shift stage can be performed. Consists of a valve (3).

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, the corresponding operation is executed.

Therefore, the shift control unit 2 reads the detection signal output from the engine speed detection unit 11, the output shaft speed detection unit 12, and the throttle valve opening degree detection unit 13 (S11), and thus the rotation speed of the current engine. And the rotational speed of the output shaft and the opening amount of the throttle valve.

Then, using the determined data, the target speed change stage and the power on / off state are determined according to the current driving state (S12).

Since the respective shift patterns are set according to the number of rotations of the output shaft rotation speed and the opening amount of the throttle valve, the target shift stage according to the current driving condition is set using the already set shift pattern, and the opening amount of the throttle valve is set. Since the power on / off region and the intermediate region are divided according to the number of revolutions of the engine and the engine, the corresponding region can be determined.

Therefore, when the target speed change stage and the driving range are determined according to the driving state of the vehicle, the shift control unit 2 determines whether the target speed change stage is changed from the current speed change stage to another speed change stage (S13).

When a shift operation to another target shift stage does not occur, the shift control unit 2 outputs a control signal having a corresponding duty ratio for controlling the operation of the pressure control solenoid valve 3 to maintain the current shift stage ( S14).

However, when the target shift stage is changed, the shift control unit 2 outputs a shift control signal for shifting to the changed target shift stage (S15) to start the shift operation to the target shift stage. .

In addition, the signals output from the engine speed detection unit 11 and the throttle valve opening degree detection unit 13 are read (S16), and the driving area according to the engine speed and the opening amount of the throttle valve, that is, power on or off. It is determined whether the area or the middle area (S17).

It is determined whether the determined driving area is changed from the power on area to the off area (S18), and if it is not changed from the power on area to the off area or maintains the same driving area, it is already set according to the determined driving area. By outputting a control signal having a duty rate for controlling the operation of the hydraulic control solenoid valve (3) in the state present so that the appropriate shift control operation can be made (S19)

However, when the determined driving area is changed from the power on area to the off area, the shift control unit 2 changes the operation of the automatic transmission according to the shift control signal output in step S14 to shift to the actual target shift stage. It is determined whether the operation is started (S20).

The shift control unit 2 can easily determine the actual shift start by using a set arithmetic expression using the rotational speed of the input / output stage of the automatic transmission and the gear ratio of the target shift stage.

When the determined shifting state is a state before the actual shifting operation is performed, the shift control unit 2 has already performed according to the determined traveling area and the target shifting stage for executing the shift control according to the traveling area determined in the step S17. The operation of the pressure control solenoid valve 3 is controlled at the set duty ratio (S21).

Therefore, the shift operation to the target shift stage may be performed according to the driving range most recently determined until the actual shift operation is performed.

However, when the actual shift operation is made, the shift control unit 2 controls the operation of the pressure control solenoid valve 3 according to the output torque of the engine without using the travel area.

Therefore, the shift control unit 2 determines the output torque of the engine according to the current driving state of the vehicle by using the data map already set (S22), and the pressure control solenoid valve 3 according to the determined output torque of the engine. The operation of the control (S23).

As described above, the shift control may be performed by using the output torque of the engine when the actual shift operation occurs without performing the shift control according to the state of the driving region that does not exactly match the driving condition of the vehicle.

Therefore, since the shifting operation of the automatic transmission is made according to the actual driving state of the vehicle, the shift shock occurring during shifting can be prevented, and the appropriate shift control operation is made, thereby improving the driving performance of the vehicle. .

In addition, since the shift control is executed according to the most recently determined driving range until the actual shift operation, the effect of more accurate shift control occurs.

Claims (4)

Engine speed detection means for changing a state of an electrical signal output according to the rotation speed of the engine; Output shaft rotation speed detecting means for changing the state of the electrical signal output in accordance with the rotation speed of the output shaft of the automatic transmission; Throttle valve opening degree detecting means for changing the state of an electrical signal output in accordance with the opening state of the throttle valve whose opening amount changes according to the operation of the accelerator pedal; When the driving state of the vehicle is connected to the sensing means and the shifting operation occurs, the driving region of the vehicle is determined, and when the determined driving region is changed from the power on region to the off region, it is determined whether the actual shifting operation is started. When the actual shift operation is started, a control signal for shift control is output according to the change in the torque of the engine regardless of the determined travel range, and when the actual shift operation does not occur, the control signal is output to the most recently determined driving range. Shift control means for outputting a control signal for controlling the shift operation to the target shift stage; And a hydraulic control device for generating a control pressure for controlling the automatic transmission by changing an operation state according to the duty ratio of the control signal output from the shift control means. The throttle valve opening degree detection means according to claim 1, wherein the traveling area is output from the engine speed detection means and the throttle valve opening degree detection means using data already set according to the engine speed and the opening amount of the throttle valve. The shift control apparatus using engine torque characterized by reading and determining a detection signal. Reading the signals output from the engine speed detecting means, the output shaft speed detecting means, and the throttle valve opening degree detecting means, and determining the target speed change stage and the driving range of the vehicle to determine whether the target speed change stage has been changed; Outputting a shift control signal to start a shift operation when the target shift stage is changed, and then reading a corresponding detection signal to determine a driving area; Determining whether the actual shifting operation is started when the determined driving area is changed from the power on area to the off area; Controlling the shifting operation by using the engine output torque according to the driving state of the vehicle when the actual shifting operation is started, and controlling the shifting operation according to the determined driving range when the actual shifting operation is not started. Shift control method using the engine torque, characterized in that. The throttle valve opening degree detection means according to claim 3, wherein the driving area is output from the engine speed detection means and the throttle valve opening degree detection means using data already set according to the engine speed and the opening amount of the throttle valve. A shift control method using engine torque, characterized in that the detection signal is read and determined.