KR19990021357U - Emergency start prevention device of automatic transmission vehicle - Google Patents

Abstract

The automatic start prevention device of the automatic transmission vehicle removes the conventional BTSI system and switches the select lever from the automatic transmission vehicle "P" and "N" modes to another mode so that the "P" and "N" modes do not need to step on the brake pedal at the start. In order to restrict the starting and departure of the vehicle by forcibly operating the brake system, using the oil pump to generate the brake hydraulic pressure, the oil passage to deliver the hydraulic pressure generated from the oil pump, and the oil pressure transmitted through the passage A brake system that performs a brake operation of the vehicle, a valve that transmits or blocks hydraulic pressure from the oil pump to the brake system, and a selector lever, and is mounted on a selector lever (not shown) of the vehicle. It is possible to force the brake operation of the vehicle when the selector lever switches from "P" or "N" mode to another mode. A select lever button switch providing a switching signal, and the valve can be opened only when the select lever position detection driving control signal and the select lever present position are "P" or "N" according to the switching of the select lever button switch; A control unit providing a control signal, a select lever position detection unit detecting a current position of the select lever according to a driving control signal provided from the control unit, and forcibly opening and closing the valve according to a valve opening and closing control signal provided from the control unit The gist of the present invention is configured to include a solenoid for driving a brake system.

Description

Emergency start prevention device of automatic transmission vehicle

The present invention relates to an automatic transmission vehicle, in particular, by switching the selector lever from the automatic transmission vehicle "P" and "N" mode to another mode, forcibly braking in the "P" and "N" modes without stepping on the brake pedal at the start. The present invention relates to a sudden start prevention device for an automatic transmission vehicle, which can prevent a sudden start of a vehicle by operating a vehicle, thereby preventing a safety accident caused by a sudden start.

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), travel position (D), and second speed position (divided by predetermined steps on the surface). 2) The 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 a lifting rod 36 elastically supported to have a force directed to the upper portion is always installed inside 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 is supported on the spring so as to project toward the detent plate 20 at all times. The locking ball 42 is fixed to 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. When the knob is pulled forward or backward, the select lever rotates about the rotation shaft 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 detent pin 36a of the lifting rod 36 is separated from the select position.

In particular, in the parking position (P), even when entering or exiting, it is necessary to press the button installed on the knob to move to another position. In this case, when the brake is not pressed, the deceleration of the lifting rod 36 The tent 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.

In addition, since a separate BTSI system must be configured to perform the above-described operation, the configuration is complicated, and there is another problem in that the cost is increased due to the complexity of the configuration.

Therefore, the present invention has been devised to solve the above-mentioned problems according to the prior art, and the object of the present invention is to remove the conventional BTSI system and select the lever from the automatic transmission vehicle "P" and "N" mode to another mode. Automatic shifting to prevent accidents caused by sudden start by limiting the rapid start of the vehicle by forcibly operating the brake system in the 'P' and "N" modes without switching on the brake pedal at the start. An object of the present invention is to provide a sudden start prevention device for a vehicle.

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 showing a sudden start prevention device for an automatic transmission vehicle according to the present invention;

3 is a flow chart showing the operation of the sudden start prevention device of the vehicle according to the present invention

♣ Explanation of symbols for main part of drawing ♣

80: selector lever switch 81: control unit

82: solenoid 83: oil pump

84: shutoff valve 85: brake system

86: select lever position detection unit 87: flow path

Features of the rapid start prevention device of the automatic transmission vehicle according to the present invention for achieving the above object is an oil pump for generating brake hydraulic pressure, a flow path for transmitting the hydraulic pressure generated in the oil pump, and the hydraulic pressure transmitted through the flow path A brake system for performing a brake operation of a vehicle by using a brake, a valve for transmitting or blocking hydraulic pressure from the oil pump to the brake system, and a select lever are provided in a selector lever (not shown) of the vehicle. A selector button switch mounted to provide a switching signal to forcibly perform a brake operation of the vehicle when the selector lever switches from the "P" or "N" mode to another mode; A control unit providing a select lever position detection driving control signal and a control signal for opening the valve only when the current position of the select lever is "P" or "N" according to the switching of the select lever button switch; A select lever position detection unit detecting a current position of the select lever according to a drive control signal provided from the control unit; And a solenoid for forcibly driving the brake system by opening and closing the valve according to the valve open / close control signal provided from the control unit.

In addition, a feature of the rapid start prevention method of the automatic transmission vehicle according to the present invention is mounted on the selector lever (not shown) of the vehicle to force the vehicle when the selector lever is switched from the "P" or "N" mode to another mode A selector lever switch for providing a switching signal to perform a brake operation of the vehicle, and a method for preventing rapid starting of an automatic transmission vehicle having a brake system, wherein the selector button switch is turned on when the vehicle is started. Detecting a current position of the select lever; Forcibly operating the brake system when the detected current position of the select lever is "P" or "N"; When the select lever is selected as the driving mode while the brake system is being forcibly operated, the step of releasing the operation of the brake system is performed.

Hereinafter, with reference to the accompanying drawings an embodiment of the rapid start prevention device of the automatic transmission vehicle according to the present invention will be described.

FIG. 2 is a block diagram illustrating an apparatus for preventing rapid start and departure of an automatic transmission vehicle according to the present invention. Referring to FIG. 1, a block configuration of a selector lever (not shown) is shown in FIG. When the switch from the N "mode to another mode, the selector button switch 80 to provide a switching signal to forcibly perform the brake operation of the vehicle, the oil pump 83 for generating the brake hydraulic pressure, and the oil A flow path 87 for transmitting the hydraulic pressure generated by the pump 83, a brake system 85 for performing a brake operation of the vehicle using the hydraulic pressure transmitted through the flow path 87, and the oil pump 83. Valve 84 for transmitting or interrupting the hydraulic pressure to the brake system 85 and the select lever button switch 80 according to the switching of the select lever position detection drive control signal and the select lever position. A control unit 81 for providing an open / close signal of the control unit, a select lever position detection unit 86 for detecting a current position of the select lever according to the driving control signal provided from the control unit 81, and the control unit 81 It is composed of a solenoid 83 that is turned on / off according to the valve 84 opening and closing control signal to open and close the valve 84.

Let's look at the operation of the rapid start prevention device of the automatic transmission vehicle according to the present invention having such a configuration.

First, the driver starts the vehicle and turns on the select lever button switch 80 attached to the select lever to select a desired driving mode for driving the select lever.

When the salver lever button switch 80 is turned on, the power B ⁺ supplied from the battery is input to the controller 81, and the controller 81 detects this signal and provides a drive control signal to the select lever position detector 86. do.

The current position of the select lever is detected according to the driving control signal provided from the controller 81, and the detected signal is provided to the controller 86 again.

The control unit 81 which receives the detection signal for the current position of the select lever determines the current position of the select lever, and if it is determined that the current position is in the "P" or "N" mode, the controller 81 provides driving power to the solenoid 82 to provide the solenoid. Turn on (82).

As the solenoid 82 is turned on, the valve 84 is opened to provide hydraulic pressure generated by the oil pump 83 to the brake system 85 through the oil passage 87. Therefore, since the brake is forcibly operated even if the driver does not step on the brake pedal, even if the lever is switched to another driving mode from the "P" mode or the "N" mode, it is possible to prevent the starting of the vehicle. In other words, if the select lever is switched to the driving mode without applying the brake in the stop mode of the vehicle, the driving force may be increased and start immediately. Therefore, the brake is forcibly operated before switching from the stop mode to the driving mode.

On the other hand, when the current position of the select lever detected by the select lever position detection unit 86 is not in the "P" or "N" mode, it is determined that it is currently running and the controller 81 is applied to the solenoid 82. The driving power is shut off to close the valve 84.

Therefore, the oil pressure generated in the oil pump 83 is blocked by the supply of the brake system by the closing of the valve 84, the operation of the brake system is not made.

The operation of the rapid start prevention device of the automatic transmission vehicle according to the present invention as described above will be described step by step with reference to FIG.

3 is an operation flowchart showing the operation of the rapid start prevention device of the automatic transmission vehicle according to the present invention.

First, while the start switch is turned on and the vehicle is started (S101), the driver determines whether the select lever button switch 80 attached to the select lever for driving is turned on (S102).

As a result of the determination, when the select lever button switch 80 is turned on, the current position of the select lever is detected (S103), and it is determined whether the detected current position of the select lever is the "P" or "N" position (S104).

As a result of the determination, when the detected current position of the select lever is not the "P" or "N" position but the driving mode, that is, the "R", "D", "2", or "1" mode, it is determined that the vehicle is currently driving. Thus, the operation of the brake system 85 is not made and the vehicle is normally driven (S107).

On the contrary, if the detected current position of the select lever is "P" or "N", the solenoid 82 and the valve 84 are forcibly controlled because there is a risk of sudden start when the vehicle switches to the driving mode. The hydraulic pressure generated from the oil pump 83 is controlled to be supplied to the brake system 85 to force the brake operation (S105).

In this way, when the driver selects a desired driving mode for driving while the brake is held (S106), the driver is forcibly operated because the position of the current select lever is different from the position of "P" or "N". The brake operation is released (S107).

That is, as shown in FIG. 2, the control unit 81 closes the valve 84 by cutting off the power supplied to the solenoid 82. Therefore, the hydraulic pressure generated by the oil pump 83 is blocked by the flow path 87 due to the closing of the valve 84, the supply to the brake system 85 is cut off. As a result, the operation of the brake system 85 is released.

As a result, the rapid start prevention device and the method of the automatic transmission vehicle according to the present invention is to press the select lever button switch 80 mounted on the select lever when the current position of the select lever is in the position of "P" or "N" By forcibly driving the brake system 85, even if the select lever is selected as the driving mode, the risk of sudden start does not occur.

As described above, the rapid start prevention device of the automatic transmission vehicle according to the present invention removes the conventional BTSI system and switches the select lever from the automatic transmission vehicle "P" and "N" modes to another mode so as not to press the brake pedal at the start. In the 'P' and 'N' mode, the brake system is forcibly operated to limit the rapid start of the vehicle, thereby preventing the safety accident caused by the sudden start.

Claims (2)

An oil pump for generating brake hydraulic pressure, a flow path for transmitting hydraulic pressure generated in the oil pump, a brake system for performing a brake operation of the vehicle by using the oil pressure transmitted through the flow path, and the oil pump to the brake system. In an automatic transmission vehicle having a valve for transmitting or blocking hydraulic pressure and a select lever, The selector button mounted on the selector lever (not shown) of the vehicle and providing a switching signal to forcibly perform the brake operation of the vehicle when the selector lever switches from "P" or "N" mode to another mode. A switch; A control unit for providing a select lever position detection driving control signal and the valve driving control signal according to the switching of the select lever button switch; A select lever position detection unit detecting a current position of the select lever according to a drive control signal provided from the control unit; An apparatus for preventing rapid start and departure of an automatic transmission vehicle, characterized in that it comprises a solenoid for forcibly driving the brake system by opening and closing the valve according to the valve opening and closing control signal provided from the control unit. The apparatus of claim 1, wherein the control unit opens the valve only when the current position of the lever detected by the select lever position detection unit is "P" or "N".