KR100298049B1 - Locking/unlocking method of select lever of automatic transmission vehicle - Google Patents

Abstract

PURPOSE: A locking/unlocking method of select lever of automatic transmission vehicle is provided to prevent the safety accident by the rapid start by controlling the select lever considering an RPM of a vehicle at the 'N' or 'P' position of the select lever at starting. CONSTITUTION: A locking/unlocking method of select lever includes the steps of detecting the present speed of a vehicle, the engine RPM, present position of the select lever and whether a brake pedal is pushed or not from a speed detecting part, an RPM detecting part, a position detecting part of the select lever and a brake signal detecting part(S101,102), operating a solenoid when the present speed of the vehicle is zero, the position of the select lever is 'N' or 'P', the engine RPM is higher than the standard value and the brake signal is not input in the state that the engine RPM is lower than the standard value(S103,104,105,106,107), and if not, making the solenoid being off(S108).

Description

Select lever locking / unlocking method of automatic transmission

The present invention relates to an automatic transmission vehicle, in particular, by controlling the select lever in consideration of the RPM of the vehicle at the start of the automatic transmission vehicle, select lever locking / unlocking of the automatic transmission vehicle to prevent the safety accident due to sudden start The present invention relates to a locking / unlocking method.

As is well known, an internal combustion engine that burns fuel in an engine and converts thermal energy generated therein into kinetic energy is used as a means of transporting and transporting cargo.

Such automobiles include a transmission for appropriately controlling the driving force of the engine and transmitting it to the axle (drive wheel). Since the gearbox does not have sufficient maneuvering power during the initial driving of the engine, it reduces the rotational force of the engine during the initial driving to increase the driving torque, or converts or increases the reduction ratio when the speed is increased so that it can be properly operated according to the driving condition of the vehicle. do. Many types of such transmissions have been developed, such as manual transmissions and automatic transmissions. The manual transmission is difficult to operate as the driver selects a gear ratio according to each driving condition, and thus requires a skilled driving technique. On the other hand, the automatic transmission device is suitable for the planetary gear assembly is properly controlled by the electronic control signal of the computer that receives the detection signal from the various sensors for detecting the driving speed and load state of the vehicle, and various valves that open and close according to the signal. It has the disadvantage that the structure is more complicated than the manual transmission, the output efficiency is low, and it is expensive, but it is easy to operate because it does not need to perform a separate operation for shifting while driving. The range of use is expanding rapidly. In addition to this, in recent years, a so-called continuously variable transmission has been developed to remove the shift stage so that there is no shift shock at the time of shifting.

The automatic transmission does not have a mechanical clutch device that transmits or blocks engine power to the transmission, and uses a torque converter using a fluid coupling. Therefore, only the accelerator pedal and brake pedal are provided in the driver's seat, and the clutch pedal necessary for power control is not provided. . Therefore, only the operation of the accelerator pedal and the brake pedal can increase or decrease the driving speed of the vehicle. However, the automatic transmission also determines the driving direction of the vehicle such as forward or reverse, and the determination of whether to transmit power such as neutral, driving, parking, etc. should be selected by the driver. Therefore, the select lever device is provided for the automatic transmission vehicle.

The select lever device includes a select lever, and the select lever includes a lifting rod that moves along a plurality of select positions formed by a step. The lifting rod is lifted by a separate operating means, and the movement in the select position is prevented. Is done. The select position is mainly formed on the detent plate arranged vertically on the base plate.

The configuration of the select lever shifting control device will be described with reference to FIG. 1. According to this, the detent plate 20 is fixed to the base plate 10 installed in the vehicle body. The detent plate 20 includes a plurality of select positions {parking position (P), reverse position (R), neutral position (N), traveling position (D), and second speed position (divided by predetermined steps on the surface, respectively). 2), low speed position L} is sequentially formed. The number of locking holes 22 corresponding to each of the select positions is formed on the detent plate 20 above the select position.

In addition, a select lever assembly 30 is rotatably supported with respect to the detent plate 20. The select lever assembly 30 has a rotating shaft 32 rotatably coupled to the lower end of the detent plate 20, and a hollow shaft having a lower end fixed on the rotating shaft 32 and having a cutout 34a formed therein. 34) is provided. A knob (not shown) to be gripped by the driver is installed at the upper portion of the hollow shaft 34, and an elevating rod 36 elastically supported to have a force directed to the upper portion is always installed at the inner side of the hollow shaft 34. The lifting rod 36 is moved to the lower portion of the hollow shaft 34 by a button provided on the knob. In addition, a detent pin 36a which protrudes in the direction perpendicular to the axial direction and moves along the select position is fixed to the lower end of the lifting rod 36, and is positioned on at least one select position. In addition, the housing 40 is fixed on the hollow shaft 34, the locking ball 42 which is supported by the spring so as to protrude toward the detent plate 20 is always provided in the housing 40. The locking ball 42 is fixed at a position corresponding to the locking hole 22 and is formed to pass the locking ball 42 through the locking hole 22 when the hollow shaft 34 is rotated.

On the other hand, one side of the detent plate 20 is provided with a device for preventing the select lever assembly 30 is moved from the parking position (P) to the reverse position (R) due to a misoperation. That is, a locking lever 50 is installed which interferes with the detent pin 36a and restricts the movement of the select lever 36 in the parking position, and is operated by a specific signal (brake signal) to operate the locking lever 50. A solenoid 60 is installed to move and allow the detent pin 36a of the lifting rod 36 to be separated.

The operating state of the select lever shift control device having such a configuration will be briefly described as follows. Pulling the knob forward or backward causes the select lever to rotate about the axis of rotation 32. At this time, the lifting rod 36 moves smoothly between the neutral position (N) and the driving position (D) without any manipulation. Further, the movement from the first speed position L of the select position to the second speed position 2 and the neutral position N can also be moved without jamming. And the movement from the reverse position (R) to the driving position (D) is also not limited. However, movement in a specific direction and position is limited in order to prevent sudden driving state change during driving due to misoperation. That is, moving from the neutral position (N) or the traveling position (D) to the second speed position (2) or the first speed position (L) or the reverse position (R) and the parking position (P) is the The tent pin 36a is caught by the step of each select position, and movement is restricted. Therefore, when such a movement is required, it is possible to move to the selected position only by pressing the button provided on the knob and moving the knob while the lifting rod 36 detent pin 36a is separated from the select position.

Particularly, when entering or leaving the parking position P, it is necessary to press a button installed on the knob to move to another position. In this case, the lifting rod 36 may be moved when the brake is not pressed. The detent pin 36a is restricted in movement by the locking lever 50. Therefore, when moving from the parking position (P) to another position, it should be assumed that the solenoid 60 must release the detent pin 36a from the fixed state by moving the locking lever 50 by pressing the brake.

That is, when the brake switch 71 is turned on when the select lever 30 is moved from the parking position P to another position, the control unit 70 detects this and turns off the solenoid 60 to lock the lever 50. The select lever 30 can be moved by being separated from the detent pin 36a.

However, in the conventional selector shift control apparatus of the above-described automatic transmission vehicle, the solenoid is operated only when the select lever is in the P mode, so that the locking lever restrains the detent pin in the neutral mode (N mode). When the vehicle is started, the select lever can move even at high RPM, and the select lever moves to the "D" position or the "R" position when the accelerator pedal is pressed instead of the brake pedal. There is a big problem.

Accordingly, the present invention has been made to solve the above-mentioned problems according to the prior art, an object of the present invention is to consider the RPM of the vehicle in the position of the select lever "N" or "P" at the start of the automatic transmission vehicle Therefore, the present invention provides a select lever locking / unlocking device for an automatic transmission vehicle that can prevent a safety accident caused by sudden start and departure by controlling the select lever.

Another object of the present invention is to provide a select lever locking / unlocking method of an automatic transmission vehicle corresponding to the operation of the select lever locking / unlocking apparatus of the automatic transmission vehicle according to the present invention.

1 is a view showing the configuration of a select lever locking / unlocking apparatus for an automatic transmission vehicle according to the prior art;

2 is a block diagram of a select lever locking / unlocking apparatus for an automatic transmission vehicle according to the present invention;

3 is a flowchart illustrating an operation of the select lever locking / unlocking method of the automatic transmission vehicle according to the present invention.

♣ Explanation of symbols for the main parts of the drawing ♣

10: base plate 20: detent plate

26: guide piece 30: select lever assembly

34: hollow shaft 36: lifting rod

36a: Detent Pin 50: Locking Lever

60: solenoid 70: control unit

71: brake signal detection unit 72: speed detection unit

73: engine speed detection unit 74: lever position detection unit

An object of the present invention described above is a solenoid, a locking lever, a select lever, a detent pin, a brake signal detection unit for detecting whether the brake pedal is stepped when the vehicle is turned on, and a speed for detecting the current vehicle speed. A detection unit, an engine speed detection unit for detecting the engine speed (RPM), a lever position detection unit for detecting the current position of the select lever, and driving the solenoid according to a predetermined condition so that the locking lever locks the detent pin. And locking the unlocking lever from the detent pin to control the locking lever to be unlocked from the detent pin. When the vehicle is started, the brake signal detecting unit, the speed detecting unit, and the engine assembly Number detecting portion, and the step of respectively detecting the current position of the rotational speed (RPM), and the select lever with the current speed and whether the vehicle that the brake pedal becomes stepped from the lever position detector, and the engine; The brake signal is input when the detected current speed of the vehicle is "0", when the position of the select lever is "N" or "P", when the engine RPM is larger than the reference value, and when the engine RPM is smaller than the reference value. If not, the solenoid is driven, otherwise it is achieved by the select lever locking / unlocking method of the automatic transmission, characterized in that the step of turning off the solenoid.

Hereinafter, an embodiment of a select lever locking / unlocking apparatus and a method of an automatic transmission vehicle according to the present invention will be described with reference to the accompanying drawings.

FIG. 2 is a block diagram illustrating a select lever locking / unlocking apparatus for an automatic transmission vehicle according to the present invention. The same components that overlap with those of the prior art shown in FIG. 1 will be omitted. Looking at the configuration, the brake signal detection unit 71 for detecting whether the brake pedal is stepped when the start of the automatic transmission vehicle, the speed detection unit 72 for detecting the current vehicle speed, and the engine speed The engine speed detection unit 73 for detecting the RPM, the lever position detection unit 74 for detecting the current position of the select lever 30, the case where the detected current speed of the vehicle is " 0 " When the position of the lever 30 is "N" or "P", when the engine RPM is larger than the reference value and when the brake signal is not input when the engine RPM is smaller than the reference value, the solenoid 60 is driven. If not The controller 70 is configured to control the solenoid 60 to be turned off.

The operation of the select lever locking / unlocking apparatus of the automatic transmission vehicle having the above configuration will be described.

First, when the vehicle is turned on, the speed detector 72 detects the current speed of the vehicle and applies it to the controller 70. Then, the lever position detecting unit 74 detects the current position of the select lever 30, and the brake signal detecting unit 71 detects whether the driver is currently pressing the brake pedal, and the engine speed detecting unit 73 detects the current position of the vehicle. The engine RPM is detected and applied to the controller 70, respectively.

The controller 70 first turns off the solenoid 60 when the speed of the vehicle detected by the speed detector 72 has a constant speed other than “0”, that is, when driving, and then locks the locking lever 50. ) Is released from the detent pin 36a so that the select lever 30 can be freely manipulated.

On the contrary, when the speed of the vehicle detected by the speed detector 72 is "0", it is determined whether the signal detected by the select lever position detection unit 74, that is, the position of the select lever 30 is "N" or "P". Also, even when the position of the select lever 30 is located at a position other than "N" or "P", the control unit 70 turns off the solenoid 60 to turn the locking lever 50 to the detent pin 36a. Is released from).

However, when the position of the select lever 30 is "N" or "P", it is determined whether the engine RPM detected by the engine speed detection unit 73 is larger than a preset reference value.

When the current engine RPM detected as a result of the comparison determination is smaller than the preset reference value, it is determined whether the driver presses the brake pedal according to the signal applied from the brake signal detecting unit 71. As a result of the determination, when the brake pedal is pressed, the controller 70 turns off the solenoid 60 to release the locking lever 50 from the detent pin 36a.

On the other hand, when the current engine RPM is larger than the preset reference value and the driver is not stepping on the brake pedal, the control unit 70 turns on the solenoid 60, the locking lever 50 is detent pin (36a) By restraining the lock so that the select lever 30 cannot move.

As a result, the controller 70 determines the current engine RPM when the current speed of the vehicle detected by the speed detector 72 is "0" and when the position of the select lever 30 is "N" or "P". When the brake signal is not input when the reference value is larger than the reference value and when the engine RPM is smaller than the reference value, the solenoid 60 is driven. Otherwise, the solenoid 60 is controlled to be turned off.

The select lever locking / unlocking method of the automatic transmission vehicle according to the present invention corresponding to the operation of the select lever locking / unlocking apparatus of the automatic transmission vehicle according to the present invention will be described with reference to FIG. 3.

3 is a flowchart illustrating an operation of the select lever locking / unlocking method of the automatic transmission vehicle according to the present invention.

First, when the start of the vehicle is turned on (S101), the speed of the current vehicle, the on / off state of the RPM and the brake of the engine, and the current position of the select lever 30 are respectively detected (S102).

Subsequently, it is determined whether the detected speed of the vehicle is "0" (S103). If the current speed of the vehicle is not "0", that is, when the vehicle is running, the solenoid 60 is turned off to lock the lever ( 50) to release the detent pin (36a) (S108).

However, when the current speed of the vehicle is "0", it is determined whether the current position of the select lever 30 is at the "N" or "P" position, and the position of the select lever 30 is "N" or "P". If not in the position as described above to turn off the solenoid 60 to release the locking lever 50 to the detent pin (36a) (S108), the position of the select lever 30 is "N" or "P In the case of the position, the engine RPM of the vehicle is compared with the preset reference value to determine whether the current engine RPM is greater than the preset reference value (S105).

As a result of the determination, when the detected current engine RPM is smaller than the preset reference value, it is determined whether the current driver is pressing the brake pedal (S107). When the brake pedal is pressed, the solenoid 60 is turned off as described above to turn off the locking lever. The 50 is released to the detent pin 36a (S108).

However, when the current RPM value of the engine detected in step S105 is larger than the preset reference value, and when the driver does not step on the brake pedal in step S107, the solenoid 60 is turned on to lock the lever 50. This will restrain the movement of the detent pin 36a. That is, the movement of the select lever 30 is locked (S106).

As a result, the present invention, when starting the automatic transmission, that is, when starting the vehicle when the position of the select lever 30 is in the position of "N" or "P", the solenoid 60 according to the RPM of the vehicle The control is to control the locking or unlocking of the locking lever 50.

As described above, the select lever locking / unlocking apparatus of the automatic transmission vehicle and the method thereof according to the present invention have a position where the position of the select lever 30 is at the position of "N" or "P". When starting the vehicle in the case, by controlling the solenoid 60 in accordance with the RPM of the vehicle to control the locking or unlocking of the locking lever 50, high RPM when the vehicle is started in the neutral mode (N mode) The select lever can be moved even in the case that the select lever moves in the "D" position or the "R" position when the accelerator pedal is pressed instead of the brake pedal, which can solve the big problem that a safety accident may occur due to sudden start. There is this.

Claims (2)

The solenoid, the locking lever, the select lever, the detent pin, the brake signal detector for detecting whether the brake pedal is depressed when the vehicle is on, the speed detector for detecting the current vehicle speed, and the engine speed ( RPM) to detect the engine speed (RPM), the lever position detector to detect the current position of the select lever, and driving the solenoid according to a predetermined condition so that the locking lever locks the detent pin to move the select lever. A method of locking and unlocking a select lever in an automatic transmission vehicle, the control lever comprising a control unit which disables or turns off the solenoid to control the locking lever to be unlocked from the detent pin. When the vehicle is turned on, whether the brake pedal is stepped on from the brake signal detection unit, the speed detection unit, the engine speed detection unit, and the lever position detection unit, and the current speed of the vehicle; Detecting a rotational speed (RPM) of the engine and a current position of the select lever; The brake signal is input when the detected current speed of the vehicle is "0", when the position of the select lever is "N" or "P", when the engine RPM is larger than the reference value, and when the engine RPM is smaller than the reference value. If not, driving the solenoid; otherwise, turning off the solenoid. The select lever locking / unlocking method of an automatic transmission vehicle according to claim 1, wherein the solenoid is turned off. The engine speed of the engine according to claim 1, wherein the case where the vehicle speed is not greater than "0 ", the position of the select lever is not the position of " N " or " P " A select lever locking / unlocking method for an automatic transmission vehicle, characterized in that it is smaller than a preset reference value and the driver presses the brake pedal.

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