KR100285448B1 - Method for automatically selecting speed range of automatic transmission - Google Patents

Abstract

PURPOSE: An automatic speed range selection method of an automatic transmission is provided to drive conveniently by automatically selecting a speed range of a selector lever with analyzing information on idling and signals on braking force. CONSTITUTION: An idling detecting unit detects RPM of an engine, and applies a signal to a control unit. The control unit detects idling of the engine(S101). A brake detecting unit decides braking force in not detecting idling of the engine(S102). Braking force of a parking brake is detected with analyzing the signal from a parking brake detecting unit in not generating braking force continuously(S103). The control unit decides starting of the vehicle in not generating braking force, and detects selection of the D-range through a signal from a selector lever detecting unit(S104). Selection of the N-range is decided in not selecting the D-range, and the control signal is applied to an actuator(S105). The selector lever is changed from the N-range to the D-range automatically according to the control signal(S106). Traveling is performed conveniently with changing the speed range automatically by detecting braking force and idling.

Description

How to automatically select the shift range of the automatic transmission

The present invention relates to an automatic transmission, and more particularly, the shift stage range of the shift lever is from "N" to "D" or "D" to "N" according to the idling speed information and braking information of the driving vehicle. And a method for automatically selecting a shift range of the automatic transmission to be automatically selected.

In general, the automatic transmission controls the hydraulic pressure flowing into each clutch and brake side within the shift range set according to the opening rate of the throttle valve, which adjusts the driving speed of the vehicle and the amount of air sucked in, so that the transmission gear of the target shift stage is automatically It should work.

The automatic transmission controls the output power of the engine by the torque of the fluid through the torque converter, and according to the driving speed of the vehicle, the opening ratio of the throttle valve, and the respective detection conditions, the transmission control unit is configured to operate the hydraulic gear so that the transmission gear can be operated. A duty signal for control is output to synchronize the target gearshift stage with the corresponding solenoid valve.

Therefore, the automatic transmission is port-changed according to the range of the shift lever selected by the driver so that the fluid pressure is supplied from the oil pump, and the gear stage of the gear mechanism of the transmission gear mechanism is dependent on the fluid pressure through the solenoid valve controlled by the duty ratio. The operating state of the hydraulically actuated friction element is controlled to select the shift stage.

The selective action of the friction elements, which consist of clutches or brakes, shifts the operation of the planetary gear unit to achieve the proper gear ratio and then transfers the shifted power to the drive gear.

When the shifted power is transmitted to the drive gear, the shifted power is transmitted to the driven gear which is geared with the subordinate gear by the driven gear which is geared with the drive gear to control the rotational movement of the wheel.

According to the above operating principle, the automatic transmission which automatically performs the shifting operation to the target shift stage suitable for the driving state of the vehicle is in the unlocked state as opposed to the friction element in which the operating state is released when the shifting operation to the respective target shifting stage is executed. The control operation is performed to reduce the shift shock that occurs during the operation conversion of the friction element that is converted into the operating state at, to improve the speed change.

Therefore, a vehicle equipped with an automatic transmission in which a target shift stage is controlled by hydraulic pressure does not need a clutch pedal to cut power from the engine in order to change the shift stage according to the vehicle speed. Fatigue can be reduced and engine shall not occur due to a malfunction or inexperience of a driver while driving, so that even a beginner can easily operate a driving operation.

As described above, a vehicle equipped with an automatic transmission that provides convenience to the driver may be driven by road bottlenecks or frequent congestion while the driver is driving with the shift lever in the "D" range. If the speed is below a predetermined speed or maintains a stop state, the shift stage maintains a second speed creep state.

Therefore, since the vehicle is to be advanced by the torque of the engine, the driver must press the brake pedal strongly to maintain the braking force, so that the automatic transmission providing convenience to the driver has a problem of providing fatigue to the driver.

In addition, the driver may repeatedly shift the position of the shift lever from the "D" range to the "N" range and the "N" range to the "D" range as the vehicle moves and stops in a congestion section or bottleneck section. There was this.

An object of the present invention is to automatically shift to the "N" range that maintains neutral in the "D" range of the traveling shift stage when driving of the brake pedal or the occurrence of braking force of the parking brake is detected while the engine rotation speed is determined to be idle. When the release of the braking force and the engine speed exceeds idling, the shift from the "N" range to the "D" range is maintained automatically so that it is convenient to operate in the bottleneck or habitual congestion section. I did it.

In order to achieve the above object, the present invention includes the steps of detecting the state information of the vehicle to determine whether it is a start condition or a stop condition; And detecting a shift stage range of the shift lever according to a condition determined in the above process, and automatically selecting a shift stage by driving an actuator according to the shift stage range detected in the process.

1 is a block diagram illustrating a configuration of an automatic speed shift range selection apparatus of an automatic transmission according to an embodiment of the present invention.

FIG. 2 is a flowchart of automatic selection of a shift range in the present invention of FIG.

Figure 2 (a) is a shift operation from the "N" range to the "D" range at the start,

FIG. 2 (b) shows the shift operation from the "D" range to the "N" range at stop.

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

As can be seen in FIG. 1, in the shift range automatic selection device of the automatic transmission according to an embodiment of the present invention, the vehicle information detection unit 10 performs vehicle information, ie, engine, for executing the shift range automatic selection operation. The controller detects information on the rotation speed, information on whether or not a braking force is generated, and information on the current shift range.

At this time, the vehicle information detection unit 10 detects the rotational speed information of the engine and outputs a signal for whether or not idling, and detects whether the driving of the parking brake that restrains the rear wheel when the vehicle is stopped and the signal for it. The parking brake detector 12 for outputting the brake, the brake brake detector 13 for detecting whether the brake brake is driven at the time of deceleration or braking control of the driven vehicle, and outputting a signal therefor is shifted of the shift stage lever. The shift lever detecting unit 14 detects position information.

The control unit 20 controls the overall operation of executing the shift stage range automatic selection of the shift lever by analyzing a signal for whether the engine is idle and a signal for generating braking force applied by the vehicle information detection unit 10.

The actuator 30 is driven in a predetermined state according to a signal applied from the control unit 20 to induce a shift stage range selection of the shift lever 40 through a link.

Referring to FIG. 2, an operation for automatic shift stage selection in the present invention having the function described above is as follows.

First, when the vehicle in a stationary state is to be started, the driver performs an operation of increasing the output of the engine through the accelerator pedal. At this time, the idling detection unit 11 of the vehicle state detection unit 10 is configured for the rotation speed of the engine. When information is detected and a signal corresponding thereto is applied to the control unit 20 side, the control unit 20 determines whether the rotation speed of the applied engine is in the idling state (step 101).

If it is determined in step 101 that the rotational speed of the engine is not in the idling state, it is determined whether a signal applied from the braking brake detection unit 13 has generated a braking force (step 102).

If the continuous braking force has not been generated in step 102, the signal applied by the parking brake detection unit 12 is analyzed to determine whether the braking force is generated through the parking brake (step 103).

If the braking force is not generated in step 103, the controller 20 determines that the vehicle is in a stopped state and selects the current shift stage range as the “D” range through a signal applied from the shift lever detector 14. It is determined whether it is (Step 104).

If the shift stage range is not selected as the "D" range in step 104, it is determined that it is located in the "N" range, and a predetermined control signal is applied to the actuator 30 side in accordance with the operation of the set program (step 105). ).

The actuator 30 is operated in accordance with the control signal applied to automatically shift the range of the shift lever 40 from the " N " range to the " D " range via the link 31 (step 106).

If it is determined that the rotational speed of the engine is idling in step 101 or that the braking force is generated in step 102 and the parking braking force is generated in step 103, it is determined that the starting condition is not satisfied. Do not perform the shift operation.

In addition, when the car traveling at a predetermined speed arrives at the destination or is stopped due to the congestion and delay of the road, as shown in FIG. 2 (b), the controller 20 may detect the vehicle state. The signal applied from the idle detection detection unit 11 is analyzed to determine whether the rotational speed of the engine is maintained at idle (step 201).

If it is determined in step 101 that the engine maintains the idling state, it is determined whether the braking force is generated by analyzing signals applied from the brake brake detection unit 13 and the parking brake detection unit 12 (steps 202 and 203). ).

If it is determined in the step that the engine is not generating a braking force without idling, the engine is returned to the initial state to maintain a continuous running state.

If it is determined that the braking force is being generated in steps 202 and 203, the control unit 20 judges the intention to stop, and then analyzes the signal applied from the shift lever detection unit 14 to determine the current shift stage range as the "N" range. It is determined whether or not it is located at (step 204).

In step 204, if it is not located in the "N" range at the current shift stage, a predetermined control signal is applied to the actuator 30 side according to the set program (step 205) to induce driving of the actuator 30.

The actuator 30 is driven in a predetermined state according to the applied control signal to convert the shift stage range of the shift lever 40 from the "D" to the "N" range via the link 31 (step 206).

As described above, the present invention automatically adjusts the range selection of the shift lever by analyzing the idle speed information of the engine and a signal of whether the braking force is generated, thereby repeatedly shifting the driver's vehicle in the stagnation and bottleneck sections. The selection operation is eliminated to provide convenience for operation.

Claims (3)

A method for selecting a shift range of an automatic transmission, the method comprising: determining whether a starting condition or a stopping condition is detected by detecting state information of a vehicle; Detecting a selected shift range of the shift lever in accordance with a condition determined in the process; And a step of automatically selecting a shift stage by driving an actuator according to the shift stage range detected in the above process. The speed change range of the automatic transmission according to claim 1, wherein the state information detected in the process comprises information on whether the engine is idle, braking force is generated, and information on whether or not the braking force is generated. Auto selection method. The method according to claim 1, wherein if the condition detected in the exaggeration is a starting condition, the shift from the "N" range to the "D" range is carried out by driving the actuator, and if the stop condition, the "D" range to the "N" range. Automatic shift speed range selection method of the automatic transmission, characterized in that to proceed with the shift.