KR970006844B1 - Best transfer step control and method by over drive switch - Google Patents

Abstract

Disclosed is an apparatus and a method for controlling maximum speed value of a speed changer. The apparatus comprises an over-drive switch(SW1) and a speed change controller(10). The over-drive switch(SW1) changes maximum speed value of the speed changer as a result of selection by an user. The speed change controller(10) sets the maximum speed value as the input signal from the over-drive switch(SW1), and changes the set value as a result of number of changing the input signal from the over-drive switch(SW1). Thereby, the operation of speed changing is properly performed according to drive state of the car.

Description

Maximum target shift stage size control device and method according to the state of overdrive switch

1 is a block diagram of an automatic shift control device equipped with a conventional overdrive switch.

2 is a block diagram of an apparatus for controlling a maximum target shift stage size according to a state of an overdrive switch according to an exemplary embodiment of the present invention.

3 is a flowchart illustrating a method of controlling a maximum target shift stage size according to a state of an overdrive switch according to an exemplary embodiment of the present invention.

The present invention relates to an apparatus and method for controlling the maximum target shift stage according to the state of an overdrive switch, and more specifically, an overdrive switch whose connection state is varied by a driver's selection operation. The present invention relates to a maximum target shift stage size control apparatus and a method for controlling the maximum shift stage according to a state of an overdrive switch to set the maximum target shift stage to the highest stage so that a proper shifting operation can be performed according to driving conditions.

In general, a vehicle equipped with an automatic transmission controls a hydraulic pressure within a shift range set according to a driving speed of a vehicle so that a target shift unit shift gear 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 corresponding gear may be operated according to the operating state of the vehicle. 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 to cut off power from the engine in order to change the operating state of the corresponding shift gear. Fatigue can be reduced, and an engine stall does not occur due to malfunction or inexperience of a driver while 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 movement of the friction element, which consists 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 which is geared to the longitudinal reduction gear by the driven gear which is geared to the drive gear to control the rotational operation of the wheel.

As described above, when the power of the engine is decelerated at a proper speed in the gearbox and transmitted to the wheels of the vehicle through the drive gear, the driven gear and the longitudinal reduction gear, the variation of the output torque transmitted through the drive gear during shifting causes the driven gear to shift. Delivered directly through.

As described above, the automatic transmission device in which the automatic transmission operation is performed within a range set according to the driving state of the vehicle is equipped with an overdrive switch.

The overdrive switch is changed in an on / off state according to the driver's selection operation, and is changed to the overdrive mode when the overdrive switch is selected by the driver.

Therefore, in the case of an automatic transmission in which the four speed stages are set, whether the shifting operation is performed at the driving stage D up to three speeds or up to four speeds may be performed. Determine using.

Therefore, to determine the driver's shifting intention as described above, as shown in FIG. 1, the shift control unit 1 controls the state of the input signal that is varied according to the on / off state of the overdrive switch SW1 mounted therein. To judge.

In addition, an overdrive off light L1 is mounted to externally recognize whether the overdrive switch SW1 is operated, so that the lighting state may be changed according to the on / off state of the overdrive switch SW1. .

However, if the overdrive switch SW1 connected to the shift control unit 1 does not operate normally, the shift control unit 1 is input through the overdrive switch SW1 regardless of the driver's selection operation. Determine the size of the highest gear stage according to the signal condition.

Therefore, a problem arises in that the determination operation of the top shift stage according to the driver's selection operation is not performed correctly, and the shift operation at the driving stage fails to execute the shift operation up to the maximum shift stage due to the failure of the overdrive switch SW1. .

Therefore, since the shifting operation is not performed at the gear shift stage suitable for the driving state of the vehicle, fuel economy is deteriorated and a lot of noise is generated.

In addition, the driving performance of the vehicle is reduced, and since the operation of the engine is not made smoothly, many harmful exhaust components are emitted.

Therefore, an object of the present invention is to solve the above-mentioned conventional problems, regardless of the selection operation of the overdrive switch in the initial stage of operation of the vehicle, the size of the highest shift stage is set to the highest stage, and according to the signal change of the overdrive switch. The maximum shift stage control device according to the state of the overdrive switch for shifting to the highest stage even when the size of the maximum shift stage is variable so that the maximum shift stage size cannot be changed due to the overdrive switch. It is to provide a method.

As a means for achieving the above object, the configuration of the present invention comprises: an overdrive switch capable of varying the size of the highest shift stage, in which an operating state is varied according to a driver's selection operation; Connected to the overdrive switch, and reads a signal input through the overdrive switch to set the read signal state to a state where the size of the highest shift stage is selected as the highest stage, and then the change of the signal of the overdrive switch to be read And shift control means for varying the height of the highest shift stage in accordance with the number of times.

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

Parts performing the same functions as in the prior art have the same reference numerals.

2 is a block diagram of a maximum shift stage size control apparatus according to a state of an overdrive switch according to an embodiment of the present invention, and FIG. 3 is a maximum shift stage size control according to a state of an overdrive switch according to an embodiment of the present invention. Operational flowchart of the method.

Looking at the configuration of the present invention with reference to Figure 2, the power supply (B +), the overdrive switch (SW1) connected to the power source (B +) and the on / off state is changed according to the driver's selection operation, A shift control unit connected to the overdrive switch SW1 to determine an operation state of the overdrive switch SW1 selected by the driver and to output a drive signal capable of externally recognizing an operation state of the overdrive switch SW1; 10) and the over / off state is changed according to the driving signal output connected to the output terminal OUT of the shift control unit 10 so that the operating state of the overdrive switch SW1 can be recognized externally. It consists of a drive off light (L1).

The operation of the present invention made as described above is as follows.

First, when the power required for each operation is supplied by the operation of the start switch not shown by the driver, the shift control unit 10 starts the operation (S10).

Therefore, when the start switch is operated for driving operation of the vehicle and power is supplied, the shift control unit 10 reads a signal input from the overdrive switch SW1 (S20), so that the state of the input signal is a high level H state. Alternatively, it is determined whether the L state is at a low level (S30).

When the state of the overdrive switch SW1 is in a normal state, when the state of the signal is in a high level, the state of the overdrive switch SW1 is turned on by the driver, and conversely, the signal state of the overdrive switch SW1 is in a low level. In the in-L state, the overdrive switch SW1 is in an off state.

However, when the overdrive switch SW1 cannot perform the normal operation in an abnormal state, only the high level H or the low level L signal is continuously read regardless of the operation of the overdrive switch SW1 by the driver.

Therefore, after the start operation of the vehicle, when the read signal of the overdrive switch SW1 is H having a high level, the H signal is set to a signal selected at the fourth speed of the maximum speed change stage (S40).

However, when the read signal state of the overdrive switch SW1 is L having a low level, the L signal is set to a signal selected at the highest speed as 4 speeds as the highest speed stage (S50).

As described above, when the driving operation of the vehicle is performed for the first time, since the size of the maximum shift stage is set to the fourth speed, which is the highest stage, the shift selection operation by the overdrive switch SW1 is not performed due to the failure of the overdrive switch SW1. Otherwise, the problem of shifting up to three speeds can be prevented.

After setting the initial signal state input through the first read overdrive switch SW1 to the highest speed shift stage for performing the shift operation up to 4 speeds, the shift control section 10 sets the initial value of the variable A ( S60).

The signal input from the overdrive switch SW1 is read (S70), and it is determined whether the state of the input signal of the first overdrive switch SW1 determined in the step S30 is variable (S80).

Therefore, when the determined signal state of the overdrive switch SW1 is the same as the signal of the first overdrive switch SW1 determined in the step S30, the shift control unit 10 is in an abnormal state of the overdrive switch SW1. It is determined that the driver does not normally change the signal state according to the driver's selection operation or the driver's selection operation to change the size of the highest shift stage from four speeds to three speeds, which is the highest stage, is not performed.

Therefore, the shift control unit 10 proceeds to step S70 and maintains the signal state of the overdrive switch SW1 while maintaining the size of the highest speed change stage at the highest speed in the state set in the steps S40 and S50. Read and judge.

However, when the first level of the overdrive switch SW1 is changed from the low level L or the high level H state to the high level H or the low level L, the shift control unit 10 is in a normal state in which the overdrive switch SW1 operates normally. Judging by.

Therefore, the shift control unit 10 increases the value of the variable A counting the number of operations of the overdrive switch SW1 by 1 (S90), and then determines whether the increased variable value A is an even multiple of 2. Determine (S100).

When the determined variable value A is an even number, the shift state in which the connection state of the overdrive switch SW1 is changed is changed to the same state as the initially set shift state.

Therefore, the shift control unit 10 sets the size of the highest shift stage selected by the selection operation of the overdrive switch SW1 to 4 speeds, which is the highest stage (S110), and then turns off the state of the overdrive off light L1. After the signal state output to the output terminal OUT is changed to L, which is a low level (S120), the process proceeds to step S70 to determine the state of the overdrive switch SW1.

However, if the determined variable value A is determined to be an odd number, the shift control unit 10 may change the size of the highest shift stage from four speeds, three speeds, to three speeds, depending on the driver's willingness to drive the overdrive switch SW1. ) Is determined to be a variable state.

Therefore, after the shift control unit 10 changes the size of the highest shift stage to three speeds (S130), and outputs a high level H signal to the output terminal OUT in order to turn on the overdrive off light L1 ( In step S140, the process proceeds to step S70 to determine the state of the overdrive switch SW1.

Therefore, using the overdrive off light L1 of which the driver is turned on, the shift operation may be performed only up to three speeds with the size of the highest shift stage selected by the operation of the current overdrive switch SW1 being three speeds. It can be recognized.

As described above, after the initial operation of the vehicle is performed, the highest shift stage is set to the highest stage and the position of the highest shift stage is changed according to the variable number of times of the overdrive switch SW1. Even when it occurs, the shift operation to the highest stage can be made.

Therefore, the effect of the present invention operating as described above occurs when the shift operation up to the third speed is possible, even if the overdrive switch that can change the shift state by the driver's selection operation is possible, so that only three speeds are made. Fuel economy can solve the problem of weakening or noise.

In addition, since the proper shifting operation is performed according to the driving state of the vehicle, the driving performance can be improved, and the degree of generation of harmful components in the exhaust gas can be reduced.

Claims (3)

An overdrive switch configured to change an operation state according to a driver's selection operation and to change a size of a top speed change stage; Connected to the overdrive switch, and reads a signal input through the overdrive switch to set the read signal state to a state where the size of the highest shift stage is selected as the highest stage, and then the change of the signal of the overdrive switch to be read The maximum speed change size control device according to the state of the overdrive switch, characterized in that it comprises a shift control means for varying the size of the maximum speed change in accordance with the number of times. The apparatus of claim 1, further comprising an overdrive off light (L1) in which the point / lighting state is changed according to a signal state output from the shift control means, so that the driver can recognize the current maximum shift stage size. Size control device of the top shift stage according to the state of the overdrive switch, characterized in that. Reading a signal input from an overdrive switch and setting the read signal state to a state where the highest stage is selected as the highest shift stage; After initializing the variable, reading a signal input from the overdrive switch to determine whether the signal state has changed; If the signal state of the determined overdrive switch is changed, increasing the variable value by one and determining whether the variable value is a multiple of two; Setting the size of the highest shift stage to the highest stage and outputting a signal for turning off the overdrive off light L1 when the state of the determined variable value is a multiple of two; If the state of the determined variable value is not a multiple of 2, setting the size of the highest shift stage to a shift stage smaller than the highest stage and outputting a signal for turning on the overdrive off light L1 Maximum shift stage size control method according to the state of the overdrive switch, characterized in that consisting of.