KR101836615B1 - Apparatus and Method for controlling transmission actuator based on temperature automatically - Google Patents

Abstract

The present invention relates to a transmission actuator control technology, and more particularly, to a transmission actuator control technique for setting a relationship between a pressure and a current for each temperature at a final stage in which a current is output, thereby reducing a loss of temperature- And an automatic control apparatus and method.

Description

TECHNICAL FIELD [0001] The present invention relates to an automatic control device for a transmission actuator,

The present invention relates to a transmission actuator control technology, and more particularly, to a transmission actuator control technique for setting a relationship between a pressure and a current for each temperature at a final stage in which a current is output, thereby reducing a loss of temperature- And an automatic control apparatus and method.

BACKGROUND ART [0002] In general, a driving force of a motor vehicle greatly changes according to the amount of cargo, the condition of a road, and the running speed, and a transmission, which is a device for converting the power of the engine into an appropriate driving force, is provided.

These transmissions are largely classified into manual transmissions and automatic transmissions. Here, the manual transmission is composed of an external gear set for operating by the driver and a mechanical clutch. The manual transmission is simple in structure, has less trouble occurrence, is light in weight, and is directly connected by a mechanical clutch.

Alternatively, the automatic transmission performs the operation of the clutch and the gear shift automatically according to the operating conditions of the machine, instead of the driver. For this purpose, a motor, a planetary gear, and a solenoid are configured.

Thus, the actuator control for moving this clutch calculates the pressure or duty required for the current transmission system and calculates the final current for applying the actual current to the solenoid through the map defining the pressure-current relationship.

A drawing showing this is shown in Fig. 1A, a system target pressure 130 is calculated via a graph 110 corresponding to the obtained temperature versus another factor (e.g., torque, engine speed), and a pressure versus current map 140 to produce a final current 150 corresponding to this target pressure 130. [ This final current 150 becomes a current for driving the solenoid.

Fig. 1B is a conceptual diagram of the hydraulic waveform generation according to Fig. 1A. Referring to FIG. 1B, in the case of the step section 101 for filling the hydraulic pressure with the oil passage being empty, a step value (for example, 600) is applied using the temperature map 190 consisting of the temperature axis and the engine speed, The temperature axis and the torque value are still used in the subsequent hydraulic pressure generating section 102.

In such a case, there is a problem that the map defining the relationship between the pressure and the current has a large difference depending on the temperature.

In order to overcome such a problem, a method of calculating the compensation value in consideration of the temperature relationship is used when calculating the pressure in the shift control stage. However, this method has a disadvantage in that the development load is increased by the number of maps in order to improve the transmission feeling, which means that the map is formed by the axes according to the respective control map temperatures.

In other words, it is necessary to calibrate a large number of maps according to the temperature when controlling the transmission, which means that it is difficult to establish a temperature-specific test environment.

1. Korean Patent No. 10063462 2. Korean Patent Publication No. 10-2012-0055877

The present invention has been made in order to solve the problem according to the above background art, and it is an object of the present invention to provide a method and apparatus for minimizing a factor for a temperature in calculating a system target pressure so as to reduce the difficulty in constructing a calibration environment and / And an automatic control device and method for a transmission actuator.

It is another object of the present invention to provide an automatic control device and method of a transmission actuator according to a temperature using a different factor instead of a temperature factor in system target pressure calculation.

In order to achieve the above object, the present invention provides a transmission actuator automatic control apparatus according to temperature that minimizes a factor with respect to temperature during calculation of a system target pressure to reduce the difficulty in constructing a calibration environment and / to provide.

The transmission actuator automatic control device includes:

An engine control unit (ECU) for obtaining an output factor related to the engine;

A temperature sensor for detecting a temperature of oil supplied to the transmission;

Calculating a target pressure by using a plurality of target pressure calculation maps previously set corresponding to the output factor and calculating a target pressure in accordance with the detected temperature, A controller for calculating a final current according to the target pressure using a pressure-current map; And

And an actuator for driving the transmission according to the final current to supply the hydraulic pressure to the transmission.

At this time, the controller linearly interpolates the temperature on the pressure-current map corresponding to the upper and lower limits of the detected temperature, and calculates a final current according to the target pressure using the linearly interpolated pressure-current map . ≪ / RTI >

Further, the controller may calculate the target pressure using two similar target pressure calculation maps among the plurality of target pressure calculation maps.

Further, the output factor may be any one of an engine output torque, an engine speed, a vehicle speed change rate, and an Excel opening value.

Also, the pressure-current map may have a plurality of pressure-current curves (PI curves) for each temperature.

Also, the plurality of target pressure calculation maps and the pressure-current map may be a lookup table generated in advance by an experiment.

On the other hand, another embodiment of the present invention includes an output factor acquiring step in which an ECU (Engine Control Unit) acquires an output factor related to the engine; A target pressure calculating step of calculating a target pressure using a plurality of target pressure calculation maps previously set so that the controller corresponds to the output factor; A temperature detecting step of detecting a temperature of oil supplied to the transmission using a temperature sensor; A final current calculating step of calculating a final current according to the target pressure using a pressure-current map previously set in relation to the target pressure versus a final current for each temperature according to the detected temperature; And a hydraulic pressure supply step of driving the actuator according to the final current to supply the hydraulic pressure to the transmission. The automatic control method of a transmission actuator according to temperature may further comprise:

Calculating a final current by linearly interpolating a temperature on the pressure-current map corresponding to an upper limit value and a lower limit value of the detected temperature; And calculating the final current according to the target pressure using the linear interpolated pressure-current map.

Further, the target pressure calculating step may be characterized in that the controller calculates the target pressure using two target pressure calculation maps which are similar to each other among the plurality of target pressure calculation maps.

According to the present invention, it is possible to reduce the loss of the temperature-related elements in the previous step by setting the relationship between the pressure and the current per temperature at the final stage at which the final current applied to the actuator is outputted.

Another advantage of the present invention is that the difficulty in establishing a calibration amount and / or temperature-specific test environment can be reduced by minimizing a factor with respect to temperature in calculating the system target pressure.

Another advantage of the present invention is that accurate calibration can be performed even when a different factor is used instead of the temperature factor in the system target pressure calculation.

1A is a conceptual diagram for calculating a final current to be applied to an actuator of a general transmission.
Fig. 1B is a conceptual diagram of the hydraulic waveform generation according to Fig. 1A.
2 is a block diagram of a configuration of an automatic transmission controller 20 according to an embodiment of the present invention.
FIG. 3A is a view showing a concept of automatic control of a transmission actuator according to temperature according to an embodiment of the present invention.
FIG. 3B is a conceptual diagram of the hydraulic waveform generation according to FIG. 3A.
4 is a flowchart illustrating an automatic control process of a transmission actuator according to an embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Like reference numerals are used for similar elements in describing each drawing. The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. The term "and / or" includes any combination of a plurality of related listed items or any of a plurality of related listed items.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are to be construed as ideal or overly formal in meaning unless explicitly defined in the present application Should not.

Hereinafter, an apparatus and method for automatically controlling a transmission actuator according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram of a configuration of an automatic transmission controller 20 according to an embodiment of the present invention. 2, the transmission actuator automatic control device 20 includes an actuator 200, a controller 260 for controlling the actuator 200, an ECU 260 connected to the controller 260 for transmitting operation information of the vehicle, (Engine Control Unit) 270, an engine 280 controlled by the ECU 270, a temperature sensor 280 for detecting the temperature of oil supplied to the transmission, and the like. Needless to say, gears, motors, and the like may be provided, but a description thereof will be omitted for the sake of clear understanding of the present invention.

The actuator 200 includes a spool 230 that opens and closes an inlet port of the flange in which the inlet port, the outlet port, and the outlet port are formed to open and close the inlet port and / or the outlet port of the outlet port, and an armature 210, And a coil 220 surrounding the inner side of the coil 210 is installed. Further, a spring 240 for restoring force is constituted at one end.

A magnetic force line is formed as a current is supplied from the controller 260 to the coil 220 so that the armature 210 is moved to the right and the spool 230 is moved to the right by the movement of the armature 210. [ . Accordingly, the hydraulic pressure is discharged or introduced through the opening / closing port 231. In other words, the actuator 200 drives according to the final current to supply the hydraulic pressure to the transmission (not shown).

In contrast, when the current applied to the coil 220 is cut off, the spool 230 returns to the initial position due to the elastic restoring force of the compressed spring 240. As a result, the opening / closing port 231 is closed and the discharge or inflow of the hydraulic pressure is blocked.

The engine 280 includes a continuously variable valve timing (CVVT), a double over head camshaft (DOHC), a continuous valved timing (CVT), a gasoline direct injection (MPI) (Common Rail Direct Injection), High Direction Turbo Intercooler (HTI), Variable Geometry Turbocharge (VGT) engine, and LPi (Liquid Propane Injection) engine using gas as fuel.

The controller 260 calculates a target pressure using a plurality of target pressure calculation maps previously set to correspond to the output factors and sets the target pressure in relation to the target pressure versus final current in accordance with the detected temperature And calculates a final current according to the target pressure using a temperature map.

In particular, the controller 260 may be a TCU (Transmission Control Unit).

An Engine Control Unit (ECU) 270 acquires an output factor associated with the engine 280 and / or transmission (not shown) and transmits it to the controller 260.

The temperature sensor 290 functions to detect the temperature of the oil supplied to the transmission (not shown).

FIG. 3A is a view showing a concept of automatic control of a transmission actuator according to temperature according to an embodiment of the present invention. Referring to Fig. 3A, the controller 260 in Fig. 2 acquires the output factor from the ECU (270 in Fig. 2), and outputs the first to the nth target pressure calculation maps 310- 1 to 310-n) is used to calculate the target pressure 330. In addition, unlike the one shown in Fig. 1, the pressure-current curve (PI Curve) does not use a factor relating to the temperature when the target pressure is used. Instead, the target pressure is calculated using the output torque, the engine speed, the opening angle of the cylinder, and the like, which are output factors.

3B is a conceptual diagram of the hydraulic waveform generation according to Fig. 3A. Referring to FIG. 3B, in the case of the step section 301 for filling the oil pressure with the oil passage being empty, a step value (for example, 600) is applied using the temperature map 190 including the temperature axis and the engine speed, In the subsequent hydraulic pressure generation section 302, the temperature axis at the time of hydraulic pressure generation is subtracted and the torque value is calculated by subtracting the temperature axis from the other torque values (for example, output RPM, Is used. Therefore, the temperature is only reflected in the final PI curve determination after generation of the hydraulic waveform.

If the first to nth target pressure calculation maps 310-1 to 310-n are the output torque on the x-axis, the y-axis may be the engine rotation speed. Of course, other factors can be used, and the factors of the x and y axes can be configured differently. Also, the first to nth target pressure calculation maps 310-1 to 310-n are configured in the form of a lookup table already analyzed according to the experimental data.

Particularly, two target pressure calculation maps (for example, the first target pressure calculation map 310-1 and the nth target pressure calculation map 310-1) among the first to nth target pressure calculation maps 310-1 to 310- And the output map 310-n), the target pressure 330 can be calculated from the calculated map. Or by using the average of them.

When the target pressure is calculated, the controller 260 of FIG. 2 uses the temperature sensor 290 to calculate a pressure-current map 340 that is preset in relation to the target pressure versus the final current for each temperature according to the detected temperature To calculate a final current (350) according to the target pressure.

For example, in the case where the detected temperature is 5 占 폚, in this case, the lower limit value of the detected temperature in the preset pressure-current map 340 is the temperature 1 (for example, 0 占 폚) and the upper limit value is the temperature 2 10 deg. C, for example). Therefore, the final current corresponding to the target pressure is obtained from the pressure-current map 340 by linear interpolation 341 with the average value of the temperature 1 and the temperature 2.

Here, the output factor may be an engine output torque, an engine speed, an opening degree of an engine, or the like, which influences a transmission (not shown).

Also, the pressure-current map 340 may have a plurality of pressure-current curves (PI curves) for each temperature.

Of course, this pressure-current map 340 may also be a lookup table generated in advance by the experimental data.

4 is a flowchart illustrating an automatic control process of a transmission actuator according to an embodiment of the present invention. Referring to FIG. 4, an engine control unit (ECU 270 in FIG. 2) acquires an output factor such as an output torque, engine speed, etc. related to the engine 280 (Step S410).

Thereafter, the controller 260 calculates a target pressure using a plurality of target pressure calculation maps previously set so as to correspond to the output factors (step S420).

Thereafter, the controller 260 detects the temperature of the oil supplied to the transmission using the temperature sensor (290 in Fig. 2) (step S430).

As the temperature is detected, the controller 260 calculates the final current according to the target pressure using the pressure-current map 340 preset in relation to the target pressure versus the final current by temperature (step S440) .

When the final current is calculated, the actuator (200 in FIG. 2) drives the final current to supply the hydraulic pressure to the transmission (not shown) (step S450).

20: Transmission actuator automatic control device
190: Temperature map
200: Actuator
210: armature 220: coil
230: spool 231:
240: spring
260:
270: ECU (Engine Control Unit)
280: engine
290: Temperature sensor

Claims (12)

An engine control unit (ECU) for obtaining an output factor related to the engine;
A temperature sensor for detecting a temperature of oil supplied to the transmission;
Calculating a target pressure by using a plurality of target pressure calculation maps previously set corresponding to the output factor and calculating a target pressure in accordance with the detected temperature, A controller for calculating a final current according to the target pressure using a pressure-current map; And
And an actuator for driving the transmission according to the final current to supply the hydraulic pressure to the transmission,
Wherein the output factor is any one of an engine output torque, an engine speed, a vehicle speed change rate, and an Excel opening value,
Wherein the pressure-current map has several pressure-current curves (PI curves) for each temperature.
The method according to claim 1,
The controller computes the temperature on the pressure-current map corresponding to the upper and lower limits of the detected temperature by linear interpolation and calculates the final current according to the target pressure using the linearly interpolated pressure-current map Automatic control of transmission actuator according to temperature.
The method according to claim 1,
Wherein the controller calculates the target pressure using two similar target pressure calculation maps among the plurality of target pressure calculation maps.
delete delete The method according to claim 1,
Wherein the plurality of target pressure calculation maps and the pressure-current map are look-up tables generated in advance by an experiment.
An output factor acquiring step in which an ECU (Engine Control Unit) acquires an output factor related to the engine;
A target pressure calculating step of calculating a target pressure using a plurality of target pressure calculation maps previously set so that the controller corresponds to the output factor;
A temperature detecting step of detecting a temperature of oil supplied to the transmission using a temperature sensor;
A final current calculating step of calculating a final current according to the target pressure using a pressure-current map previously set in relation to the target pressure versus a final current for each temperature according to the detected temperature; And
And a hydraulic pressure supply step in which the actuator is driven in accordance with the final current to supply the hydraulic pressure to the transmission,
Wherein the output factor is any one of an engine output torque, an engine speed, a vehicle speed change rate, and an Excel opening value,
Wherein the pressure-current map has several pressure-current curves (PI curves) for each temperature.
8. The method of claim 7,
The final current calculating step may include:
The controller linearly interpolating the temperature on the pressure-current map corresponding to the upper limit value and the lower limit value of the detected temperature; And
Wherein the controller calculates a final current according to the target pressure using a linear interpolated pressure-current map. ≪ Desc / Clms Page number 19 >
8. The method of claim 7,
Wherein the target pressure calculating step calculates the target pressure using two target pressure calculation maps that are similar to each other among the plurality of target pressure calculation maps.
delete delete 8. The method of claim 7,
Wherein the plurality of target pressure calculation maps and the pressure-current map are lookup tables generated in advance by an experiment.

Images