KR19990068802A - Method and appratus for proventing sudden departure of car - Google Patents

Abstract

The present invention relates to a method and apparatus for preventing sudden start of a vehicle which prevents a sudden start state from occurring in advance. The method and apparatus for preventing sudden start according to the present invention in an automatic vehicle include a gear in a neutral state in an engine starting step. If the brakes are not operated or the engine is not started, and after the engine is started by satisfying the above conditions, the gear is not shifted in the neutral state until the engine speed falls below the reference value, thereby preventing sudden start.

Description

METHOD AND APPRATUS FOR PROVENTING SUDDEN DEPARTURE OF CAR}

The present invention relates to an automatic vehicle that automates the operation of a clutch, and more particularly, a method and apparatus for preventing sudden start of a vehicle that can prevent accidents in advance rather than after action by converting the structure into a structure in which a sudden accident itself cannot occur. It is about.

Nowadays, sudden accidents of automatic cars occur frequently, resulting in many casualties. However, there is no clear explanation on the reason for the sudden onset yet.

Most sudden accidents occur at the moment of starting, not while driving. As a supplement, various sudden accident prevention devices have been developed, but they are all configured to quickly shut off after the sudden occurrence.

In addition, the automatic cars which are generally used are basically designed from the viewpoint that the brake of the car is necessary only in a moving state and not necessary when the engine is stopped, so that the brake can be operated by the pressure of the hydrobag which is operated after a certain time after starting. It is. Indeed, the operation of the oil brake is carried out by the brake oil amplified by a component called a hydrobag when the brake pedal is stepped to the cylinder of the brake device provided on each wheel, the braking operation by the friction pad coupled to the cylinder The amplification operation of the dual hydrobag is to suck the air inside the hydrobag and maintain it in a vacuum state when the engine is started and the exhaust, suction, and stroke processes are performed. Therefore, it takes some time after the engine is started until the hydrobag is completely vacuumed.

Therefore, immediately after the rapid start occurs, even if the driver presses the brake, the brake is allowed to operate only after the predetermined time has elapsed, so that the rapidly accelerated car moves by a predetermined distance at an accelerated speed. If there are obstacles or people around for time, they will cause damage or casualties.

In addition, the existing sudden accident prevention device also has a problem that leaves room for accident as a prevention device after the rapid acceleration has occurred.

In addition, in the structure of the vehicle, the engine speed (RPM) rapidly rises to a predetermined level regardless of stepping on the accelerator at the moment of starting the engine, and then the engine speed is adjusted according to the degree of stepping on the accelerator. Therefore, since the gear can be shifted at any time, when the driver is busy, the gear can be started suddenly when the gear is shifted to the D or R stage while starting in the parking (P) or neutral (N) state. In addition, when the automatic vehicle starts on the gear arrangement (PRND-1-2), the vehicle is shifted to the reverse (R) first from the parking (P) state and then changed to the neutral (N). There is a possibility of sudden oscillation due to immaturity of operation.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object thereof is to provide a method and an apparatus for preventing a sudden start of a vehicle that can prevent a sudden start state from occurring in advance as a post-action action after a sudden accident occurs. .

1 is a block diagram showing a schematic configuration of a vehicle control apparatus to which a sudden start and prevention method of a vehicle according to the present invention is applied.

FIG. 2 is a circuit diagram illustrating an embodiment of the control unit illustrated in FIG. 1.

Figure 3 is a schematic diagram showing an embodiment of a gear locking device according to the present invention.

4 is a configuration diagram illustrating an embodiment of a brake input detection unit.

Figure 5 is a block diagram showing an embodiment of an auxiliary vacuum apparatus according to the present invention.

* Description of the symbols for the main parts of the drawings *

10: engine speed detector 20: brake input detector

30: gear position detection unit 40: control unit

50: gear lock 60: starting device

70: auxiliary vacuum device 80: battery

As a technical means for achieving the above object of the present invention, the sudden start prevention method according to the present invention in the sudden start prevention method of an automatic vehicle,

In the engine start-up phase, the engine is started when the gear is in the neutral state and the brake is operated, and the gear is not shifted in the neutral state until the engine speed falls below the reference value after the engine start is started. It is characterized by preventing.

In addition, the sudden start prevention device using this method includes an engine speed detector for detecting the current engine speed (rpm), a brake input detector for detecting whether the brake is operated, and whether the position of the gear is in the neutral (N) state. Gear position detection unit and the engine start step, so that the engine does not start when the brake does not operate and the gear is not in the neutral position, and the engine speed drops below the standard value after the engine is started by satisfying the above conditions. A control unit for controlling the gears from being shifted in a neutral state until the gear is fixed, a gear locking device for fixing the gears not shifting, and releasing the neutral lock state of the gears under the control of the control unit, and according to the control of the control unit And a starting device for starting the engine.

1 is a block diagram showing a control device of the sudden start prevention apparatus according to the present invention, the engine speed detection unit 10 for detecting the current engine speed (rpm), and the brake input detection unit 20 for detecting whether the brake is operated. And, the gear position detecting unit 30 for detecting whether the position of the gear is in the neutral (N) state, and in the engine starting step, the engine is not engaged when the brake is not operated and the gear is not in the neutral position. After the engine is started by satisfying the condition, the control unit 40 controls the gear not to be shifted in a neutral state until the engine speed drops below the reference value, and the gear shift is controlled according to the control of the control unit 40. The gear locking device 50 for fixing or releasing to be impossible, the starting device 60 for starting the engine according to the control of the control unit 40, and the control according to the control of the control unit 40. It consists of an auxiliary vacuum device 70 to suck the air in the hydrobag of the brake device to make a vacuum state.

In the above description, reference numeral 80 denotes a battery provided in the vehicle, and supplies power to the above-described control device.

2 is a circuit diagram showing an embodiment of a control unit according to the present invention.

Figure 3 is a schematic view showing an embodiment of the gear locking device according to the present invention, a groove bar on one side of the lower end of the gear lever 31 for shifting gears, fixed bar formed to be inserted into the groove ( The moving shaft of the electromagnetic solenoid 33 is integrally connected to one end of the 32, and the fixed sole 32 is inserted into the groove of the gear lever 31 when the gear is in the neutral (N) position. The spring 34 is connected to the other end of the moving shaft on which the fixing bar 32 of the electronic solenoid 33 is installed, and the spring 34 is fixed to the fixing stand 35 so that the electromagnetic solenoid 33 is provided. When not in operation, the fixing bar 32 is configured to exit from the groove.

4 is a schematic diagram showing an embodiment of a brake input detecting unit for detecting an operating state of a brake according to the present invention, in which the brake pad 42 is pushed on both sides of the disk 41 rotating together with the wheels. The pressure sensor 46 is installed in the oil pipe 45 for applying oil to the cylinder 44 for braking by contacting the brake. When the pressure of the brake oil detected by the pressure sensor 46 is greater than or equal to a predetermined value, the brake is applied. To determine the operating state.

FIG. 5 is a structural diagram of a vehicle inside showing an installation state of an auxiliary vacuum apparatus according to the present invention, and a check valve 70a which prevents an air backflow to the hydrobag 56 from the air suction pipe 58 of the hydrobag 56. Auxiliary vacuum device 70 is connected to the through, and the driving power of the auxiliary vacuum device 70 is configured to be connected to the battery 80 through the contact A (SW1-a) of the ACC switch of the key switch.

Next, the operation by the present invention configured as described above will be described with reference to the detailed circuit diagram of FIG.

In general, the car's key switch is composed of four stages. When the car key is removed, the lock state is locked. When the car key is inserted into the key holder, the first switch to be turned on is the ACC switch (SW1). It is possible to operate basic electric devices such as radio and indoor light, and then turn on the on-switch (SW3). In this state, all electric functions of the vehicle are to be operated. Is the start switch SW2. Normally, the start switch SW2 is automatically turned off after the driver releases the car key that has been turned.

The apparatus according to the present invention enables the brake operation when the ACC switch SW1 and the on switch SW3, which are the engine startup, are turned on. When the driver turns the key switch and the ACC switch SW1 is turned on, the battery The power of 80 is applied to the auxiliary vacuum device 70. As shown in FIG. 5, the auxiliary vacuum device 70 is connected to the air suction pipe 58 in the hydrobag 56 through a check valve 70a. As described above, the ACC switch SW1 is provided. When it is turned on, while the contact A (SW1-a) is turned on at the same time, a battery power is applied to the auxiliary vacuum device (70). Thus, the auxiliary vacuum device 70 sucks the air in the hydrobag 56 to make a vacuum state.

In this case, the hydrobag 56 has a low hydraulic pressure when air is contained, so that the hydrobag 56 does not amplify the force exhibited by stepping on the brake pedal 51. Therefore, as described above, it becomes a vacuum state in the ACC state, and the amplification operation can be performed. At this time, the brake pedal 51 is heard.

In the ACC state, power is supplied to the auxiliary vacuum device 70 and operating power is applied to the brake input detector 20, the engine speed detector 10, and the gear position detector 30 to operate each detector. .

The engine speed detection unit 10 is a sensor for detecting the engine speed (rpm), the brake input detection unit 20 is a pressure sensor 46 for detecting whether the brake is operating, as shown in FIG. It is installed in the oil pipe 45 connected to the wheel cylinder 44 installed in the wheel to detect the hydraulic pressure of the brake oil. That is, since the hydraulic pressure of the brake oil is high in the braked state and the hydraulic pressure is low when the brake oil is not braked, the operating state of the brake can be detected by the pressure sensor 46. In addition, when the brake pedal is normally pressed, there is a play that is a depth at which the actual brake pedal operates according to the type, life and use state of the car. According to the brake input detecting unit 20, the play is different for each car. Even if the brake is pressure checked, braking can be detected accurately.

In addition, the gear position detecting unit 30 detects which state the current gear is in, and may be implemented by installing a position detecting sensor at each end. In one embodiment of the present invention is to detect only the neutral state, which can be installed in other stages as needed.

In this way, the respective detection units 10 to 30 operate to apply the sensing values to the control unit 40, respectively. At this time, the control unit 40 checks the sensing values from the detection units 10 to 30 to control the gear locking device 50 and the starting device 60. First, the gear position detecting unit 30 is checked to check the gears. Is in the neutral state, and when it is determined that the braking state is checked by checking the sensing value input from the brake input detecting unit 20, the starting device 60 is controlled to operate, and when the gear is in the neutral state, the engine speed at start-up The gear lock 50 is operated so that the gear is not shifted until it falls below the reference speed.

This operation will be described in detail in the order of starting the operation of the control unit 40.

In the ACC state, the driver operates the key switch to turn on the on switch SW3. If the driver operates the brake and the engine speed is lower than the reference speed, the contact A1 turned on when the brake detection unit 20 detects the braking state and the contact A turned on by the engine speed detection unit 10. (A3) is all turned on, the power is supplied to the second relay (R2), the second relay (R2) is excited to this, the B contact (R2-b) connected in series to the power line of the gear lock device (50) Off).

Then, the power to the gear lock 50 is cut off so that the gear lock 50 does not operate. In this case, when the second relay R2 is operated, the third relay R3 simultaneously operates to turn on the contact A3-a, and when the gear is out of the neutral position due to the shift of the driver, the gear position detecting unit. The contact B2, which was operated by 30, is turned on to maintain the operation state of the second relay R2 so that the gear locking device 50 does not operate.

If the engine speed detected by the engine speed detector 50 is less than the reference value while the on switch SW3 is turned on, the contact A3 is turned on to operate the fourth relay R4, and the B contact ( R4-b) is turned off and the operating power is cut off so that the auxiliary vacuum apparatus 70 stops the operation. From this point on, the vacuum is maintained by the suction device 54 shown in FIG.

On the contrary, if the on-switch SW3 is on, but the gear is still in the neutral state without being in the braking state, the second relay R2 does not operate, and the B contact R2-b is in the on state. Keep it.

Then, when the driver turns on the start switch SW2, the first relay R1 operates to turn on the A contact R1-a, and the fifth relay R5 operates to operate the a contact ( Turn on R5-a). In addition, if the brake is not in a braking state or the engine speed is higher than the reference value and the gear is in the neutral position at the moment of turning on the start switch SW2, the contact B2 of the second relay R2 that is not excited R2- By keeping b) in the on state, the operating power is applied to the gear locking device 50, so that the gear locking device 50 operates.

As shown in FIG. 3, when the power is not applied, the gear locking device 50 moves to the left side in the drawing by the elasticity of the spring 34, so that the gear lever 31 is moved. 2), but when the operating power is applied to the electromagnetic solenoid 33 by satisfying the conditions as described above, the moving shaft is advanced so that the fixed bar 32 is inserted into the groove of the gear lever 31. Therefore, gear shifting becomes impossible.

In addition, when the start switch SW2 is turned on, the brake operates normally, the brake is in a brake state, the gear is in the neutral state, and as shown in FIG. 2, the start switch is applied to a power line applied to the start device 60. (SW2), a contact A1 which is turned on when the braking state is detected from the brake input detection unit 20, and a which operates when the gear position detection unit 30 detects that the gear is in a neutral state. When the contacts A2 are connected in series, power is applied to the starting device 60 to start up. In the above, the starting device 60 refers to a starting motor.

As described above, when the engine speed drops to a safe state after starting, that is, when the reference value (1000 rpm) or less, the second relay (R2) is operated to turn off the contact B (R2-b), the gear lock state Release it. Accordingly, the driver can start by shifting the gear. Further, in the driving state, the a contact point R3-a of the third relay R3 excited at the same time as the second relay R2 is turned on, and since the gear is in a neutral state, the brake is positioned at a position other than neutral to maintain the turn-on state. The second relay R2 continues to turn off the B point R2-b by the B contact B2 of the input detection unit 20 so that the gear locking device 50 does not operate.

As described above, the present invention allows the brake to be activated and starts only when the gear is neutral, so that there is an excellent effect of preventing sudden occurrence of the sudden start rather than processing after the sudden occurrence of the accident. The brake is not operated after the engine is started, but can be operated at the ACC stage in the previous stage, so that the brake does not operate when the sudden start occurs in the engine startup stage, thereby preventing an accident from becoming larger.

Claims (5)

In the prevention method of sudden start of an automatic vehicle, In the engine start-up phase, the engine starts only when the gear is in the neutral state and the brake is operated, and the gear does not shift in the neutral state until the engine speed falls below the reference value after the engine starts. Prevention of sudden oscillation, characterized in that the prevention. An engine speed detector for detecting a current engine speed (rpm); A brake input detector for detecting whether the brake is operated; A gear position detecting unit for detecting whether the position of the gear is in a neutral (N) state, In the engine start-up phase, the engine starts when the brake is operated and the gear is in the neutral position, and after the engine is started by satisfying the above conditions, the gear is shifted in the neutral state until the engine speed drops below the reference value. A control unit that controls the A gear locking device for fixing the gear in a neutral state when the engine speed is greater than the reference value at start-up under the control of the controller; And a starting device for starting the engine according to the control of the control unit. The method of claim 1, wherein the sudden start prevention device And a subsidiary plant, which is driven by an operating power source applied from a battery under the control of the controller, to suck air in the hydrobag when the key switch is in the ACC state. The method according to claim 2 or 3, And the brake input detection unit is a pressure sensor installed on an oil pipe connecting a central hydro bag and a brake actuating hydraulic cylinder installed in each wheel to detect a pressure of the brake oil. The method according to claim 2 or 3, The gear locking device forms a groove in the lever of the gear, is installed to insert the fixed bar into the groove by operating the electronic solenoid coupled to the fixed bar is inserted into the groove when the power is applied, the opposite side of the electronic solenoid moving shaft combined with the fixed bar Fastening prevention device characterized in that configured to prevent the fixing bar is inserted into the groove when the power is not applied by fixing the spring.