KR19990073226A - An apparatus for preventing sudden start - Google Patents

Abstract

An ignition coil that generates sparks in the ignition device using an induced voltage, an accelerator sensor that detects a change in the accelerator and outputs the corresponding information as a digital value, and detects the engine revolutions and Engine detection sensor that outputs the comparison information as a digital value, speed detection sensor which detects the rotational speed of the wheel and outputs the comparison information between the detected value and the threshold value as a digital value, and detects the change of the braking device and provides the corresponding information. A controller that receives digital outputs, brake controller sensors, engine sensors, speed sensors and brake sensors, and outputs a rapid start control signal when it is determined that the engine is in a sudden start state based on the information. Injector to control the injection timing of the fuel supplied to the engine, and applied to the ignition coil in accordance with the control signal output from the controller The car geupbaljin protection device, characterized in that configured to include a second switching device for controlling the power applied to the injector in accordance with the control signal outputted from the first switching element, and a controller for controlling the power.

Description

An apparatus for preventing sudden start}

The present invention relates to a device for preventing sudden start of an automatic transmission vehicle, and more particularly, a device for preventing an accident due to sudden start by shutting off power applied to an ignition coil of an engine when a sudden start factor occurs.

A clutch is placed between the engine and the transmission of the car to start the engine at no load and gradually transmit the power to the wheels of the car so that the car can start smoothly. The output of the engine when running is limited, and the torque at low speeds in particular is small. Therefore, since the vehicle cannot start with the generated torque of the engine alone, a transmission, a differential gear, and the like are provided. Since the engine cannot reverse in reverse, the gear shift of the transmission is reversed, and the vehicle is retracted. When driving, the engine is increased by increasing the torque and decelerating the engine speed as the transmission and differential. Therefore, gears are selected according to driving conditions such as gearing with a high speed gear. In order to control the power of a vehicle, a clutch operation is required and an apparatus for automatically shifting gears according to driving conditions is an automatic transmission of a vehicle.

Automatic transmission was first introduced in 1939, which means gears and brakes that automatically change the speed ratio between the engine and the wheels. The most common type is a combination of a hydraulic torque converter that converts and transmits rotational speed and torque by applying fluid properties, and a two- and four-speed mechanical transmission that is automatically operated by hydraulic pressure. When the engine speed is adjusted by the operation of the accelerator pedal, the engine starts smoothly from the standstill and accelerates to the maximum speed automatically with almost no impact. Recently, an electronically controlled automatic transmission and a mechanical continuously variable automatic transmission that detect a shift point with a small computer have been used.

However, the problem that occurs when using the automatic transmission is that the initial speed of the vehicle is determined according to the position of the transmission gear of the transmission, so starting from a sudden high speed immediately after departure, the occurrence of a crash accident is very high. In recent years, the vehicle is suddenly started due to the influence of the electromagnetic waves around the automatic transmission made of an electronic control system, causing frequent accidents. In particular, as the spread of mobile communication means such as pagers and mobile phones has increased rapidly in recent years, accidents due to sudden start of automatic transmission vehicles have been increasing. Therefore, many studies have been made to solve this problem. The current technology does not know exactly which error is caused by the error, and the prevailing opinion is that it malfunctions due to defects inside the electronic control unit and the influence of electric and magnetic fields.

One of techniques for controlling the electronic clutch of the sudden start prevention device will be described. This technique has been disclosed in Korean Utility Publication No. 1998-41141. As shown in FIG. 1, the inhibit switch 1, the speed sensor 2 for detecting the speed of the vehicle, and the accelerator switch 3 for detecting whether the accelerator is operated are connected to a TCU (Transmission Control Unit) ( 4), the technique of controlling the electromagnetic clutch 8 not to operate even if the inhibit switch 1 is in any one of D, S, and L when the vehicle is stopped and the accelerator switch is turned off. to be.

Another conventional technology has been disclosed in the Republic of Korea Utility Publication No. 1997-31137. As shown in FIG. 2, when the brake switch SW1 and the PN switch SW2 are turned on at the start of the automatic transmission vehicle, the shift lever driving solenoid SL is driven to prevent sudden starting. That is, the invention relates to a sudden start and stop circuit of an automatic transmission vehicle in which the brake switch SW1 is connected in series with the PN switch SW2 via the shift lever driving solenoid SL.

As mentioned above, most of the techniques are related to the control of an electromagnetic clutch or a shift lever. Until now, only a method for reducing or eliminating electromagnetic waves affecting an electronic control system has emerged. Fundamentally, the technology to prevent the situation is not implemented.

An object of the present invention is to prevent a sudden start of a vehicle against a driver's intention.

Another object of the present invention is to block the rotation of the engine by detecting when a sudden start factor of the vehicle occurs.

Still another object of the present invention is to record / store the occurrence history of the sudden start factors of the vehicle and the state information of each device of the vehicle.

Still another object of the present invention is to fundamentally eliminate the cause of an accident by detecting an abnormal operation of the vehicle and controlling the ignition device.

Still another object of the present invention is to prevent abnormal operation of the engine by detecting abnormal operation of the vehicle and cutting off the supply of fuel provided to the engine.

Still another object of the present invention is to prevent an abrupt phenomena that may occur during driving by controlling an engine rotation by detecting an abnormal state caused by a sudden increase in engine rotation during driving.

The present invention for achieving the above object is an ignition coil for generating a spark in the ignition device using an induced voltage, an acceleration device sensor for detecting the change of the accelerator and outputting the corresponding information as a digital value, the engine speed Engine speed sensor for detecting the detected value and threshold value and outputting the digital value as comparison information, and speed sensor for detecting the rotational speed of the wheel and outputting the detected value and threshold value as digital value. A braking device sensor that detects a change in the braking device and outputs the corresponding information as a digital value;

The controller receives the information output from the accelerator sensor, the engine sensor, the speed sensor, and the brake device sensor, and outputs a sudden start control signal when it is determined that the engine is in a sudden start state. An injector for adjusting, a first switching element for controlling power applied to the ignition coil according to a control signal output from the controller, and a second switching element for controlling power applied to the injector with the control signal output from the controller Characterized in that configured.

A detailed feature of the present invention is that a predetermined memory device for storing a signal provided from each sensor is connected to the controller.

Another detailed feature of the present invention is that the power provided to the ignition coil and the injector is cut off for 5 seconds by the control signal of the controller.

1 is a block diagram showing the configuration of a sudden start prevention device according to the prior art,

Figure 2 is a block diagram showing the configuration of another sudden oscillation prevention device according to the prior art,

Figure 3 is a block diagram schematically showing the configuration of the sudden oscillation prevention apparatus according to the present invention,

4 is a block diagram showing in more detail the center of the controller of FIG.

5A through 5E are circuit diagrams illustrating the configuration of each signal input unit in detail in FIG. 4.

Hereinafter, the configuration and operation thereof according to the present invention will be described with reference to the accompanying drawings.

3 is a block diagram showing the configuration of a rapid oscillation apparatus according to the present invention. Accelerator 11 for increasing the speed of the car according to the user's intention, braking device 21 for reducing the speed of the car according to the user's intention, and engine 41 for providing driving force to the wheel 31. And an acceleration sensor 12 which detects a change in the accelerator 11 and outputs the corresponding information as a digital value, and a brake device sensor which detects the change in the brake 21 and outputs the corresponding information as a digital value. And the speed sensor 32 which detects the rotational speed of the wheel 31 and outputs the comparison information between the detected value and the threshold value as a digital value, and the detected value of the rotation speed of the engine 200. Engine detection sensor 70 for outputting the comparison information of the threshold value as a digital value, the inhibitor switch 40 for providing information on the current position state of the automatic transmission lever, and the braking device 21. Auxiliary auxiliary braking device (50), the accelerator sensor (12) and A controller that receives information output from the brake device sensor 22, the speed sensor 32, the inhibitor switch 40, the auxiliary brake device 50, and the engine sensor 70, and outputs a control signal according to the corresponding information. 100, an ignition coil 82 for providing an induced voltage for generating a spark to an ignition device (not shown) in the engine 200, and a power supply unit 80 according to a control signal output from the controller 100. From the first switching unit 81 for switching the power applied to the ignition coil 82, the injector 92 for adjusting the injection amount of the fuel supplied to the engine 200, and from the controller 100 The second switching unit 91 for switching the power applied to the injector 92 in accordance with the output control signal, and the storage device 60 for storing the output signal from each sensor provided to the controller 100 It is configured to include.

As a result of the detection of the accelerator sensor 12, when the driver does not indicate the intention of accelerating through the accelerator 11, the detection values provided from the engine sensor 70 and the speed sensor 32 deviate from each threshold value. The power applied to the ignition coil 82 and the injector 92 is forcibly cut off through the switching units 81 and 91.

4 is a circuit diagram illustrating in more detail the center of the controller of FIG. 3. A signal input unit 101 for receiving signals provided from the sensors 12, 22, 32, 40, 50, and 70 by operating power, an input signal provided through the signal input unit 101, and the memory device; A signal comparison unit 102 for reading the threshold value set in 60 and comparing the respective values, and a control signal for outputting a control signal to the switching unit when the comparison result of the signal comparison unit 102 corresponds to the sudden start state. It consists of an output part 103.

The output of the control signal and the input values from the signal comparator 102 are output to the storage device 60 according to the clock period and stored. In the description of this example, the setting of the cutoff signal among the control signals output from the control signal output unit 103 to the switching units 81 and 91 using the relay is 5 seconds, but the setting of this value can be changed. Do.

5A through 5E are circuit diagrams illustrating the configuration of FIG. 4 in more detail. A is a circuit diagram mainly showing the controller 100. Since the controller 100 can use an integrated circuit such as a microprocessor, U1 is used as a symbol in the following example. The signals sensed are represented by P11 to P52 and may store data in the memory device 60, read data stored therein, and read the data in the memory device 60 to the controller U1, although not shown. It is provided with an interfacing unit for sending. When it is determined that the input sensing results in sudden oscillation, the first switch SW1 and the second switch controlling the power applied to the ignition device and the fuel injection device by providing an output signal to the base ends of the switching transistors Q1 and Q2. Allows you to block (SW2).

5B shows a part of an input signal. The brake sensor 22 is composed of resistors R11, U11, U12, R12 and its output signal P11 is provided to the controller U1. The operation of the auxiliary braking device 50 is detected by a circuit composed of resistors R21, U21, U22, and R22, and an output signal P12 thereof is provided to the controller U1. The state detection of each lever constituting the inhibitor switch 40 can recognize a state such as parking (P), reversing (R), driving (D), two-stage driving (2), and low-speed driving (L). . The state detection of the parking (P) lever is detected by a circuit composed of resistors (R31, U31, U32, R32), and the state detection of the reverse (R) lever is applied to a circuit composed of resistors (R41, U41, U42, R42). Is detected by the circuit composed of the resistors R51, U51, U52, and R52, and the state detection of the two-stage travel 2 lever is detected by the resistors R61, U61, U62, Is detected by a circuit composed of R62, the state detection of the low-speed traveling L lever is detected by a circuit composed of resistors R71, U71, U72, and R72, and output signals P21, P22, P23, P24, P25 is provided to the controller U1.

5C is a circuit diagram showing the configuration of the accelerator sensor 12 for detecting the state of the accelerator 11. The configuration is that the accelerator operation signal provided through the reverse current prevention diodes (D1, D2) is transmitted to the inverting terminal (-) of the comparison amplifier (U2), the voltage distribution to the non-inverting terminal (+) of the comparison amplifier (U2). The operating power source B + divided by the dragon resistors R1 and R2 is provided. The variable resistor VR1 is for varying the operation reference voltage of the comparison amplifier U2. The output signal P31 of the comparison amplifier U2 is provided to the controller U1 via a signal transfer resistor R3.

5D is a circuit diagram showing the configuration of the engine sensor 70. FIG. The engine rotation signal sensed by the resistor R4 is removed from the noise by the resistor R5 and the capacitor C1 and provided to the inverting terminal (-) of the comparison amplifier U3. Diodes D3 and D4 are for preventing reverse current. At the non-inverting stage, the operating power source B + is divided and provided by the resistors R6 and R7. The output signal of the comparative amplifier is applied to the monostable multivibrator U4 via a resistor R9. The resistor R8 and the capacitor C2 are components for determining the time constant of the multivibrator U4. The output signal of the multivibrator U4 is filtered by the resistor R10 and the capacitor C3 and transmitted to the inverting terminal (-) of the comparison amplifier U5, and the non-inverting terminal (+) of the comparison amplifier U5. Is provided with a reference voltage regulated by the variable resistor VR2. The output signal P41 of the comparison amplifier U5 is transmitted to the controller U1 by the signal transfer resistor R16.

On the other hand, the output signal of the comparison amplifier U3 is also operated to the other multivibrator U6, and the output result P42 of the comparison amplifier U7 operated by the difference from the reference voltage changed by the variable resistor VR3 is obtained. It is transmitted to the controller U1 by the signal transfer resistor R17. In this case, the reference value of the tachometer may be varied according to the adjustment of the variable resistors VR2 and VR3. In other words, the standard R.P.M. for sudden oscillation control can be changed in some cases.

5E is a circuit diagram showing the configuration of the speed sensor 32. The speed detection signal of the wheel is transmitted to the multivibrator U8 via the resistors R18 and R19, and its output signal is canceled by the resistor R23 and the capacitor C7 so that the inverting stage of the comparative amplifier U9 is removed. Is passed in (-). The non-inverting stage (+) is provided with an operating power source B + through the variable resistor VR4 and used as a reference value for the output value of the comparison amplifier U9. The output value P51 of the comparison amplifier U9 is provided to the controller U1 via a resistor R24.

The operation of the multivibrator U10 and its peripheral circuit having a configuration similar to that of the multivibrator U8 and its peripheral circuit is also the same as that described above. Unexplained resistors R20 and R25 and capacitors C6 and C8 are for setting operation time constants of the respective multivibrators, and diodes D6 and D7 are for preventing reverse current.

The operation relationship between the data from each sensor provided to the signal input unit 101 and the signal comparator 102 and the control signal output unit 103 will be described. Table 1 below shows an example of the detection signal of each sensor and the comparison result in the signal comparison unit.

Signal comparison output value sensor One 0 Accelerator Sensor (Data 1) ON OFF Braking Sensor (Data 2) ON OFF Speed Sensor (Data 3) 10 km / h or more Less than 10km / h Engine detection sensor (Data 4) 3000 R.P.M or more Less than 3000 R.P.M

When the user indicates the acceleration intention by operating the accelerator 11, that is, the accelerator, the value recognized by the signal comparator 102 is "1", otherwise the value is "0". When the user indicates the braking intention by operating the braking device 12, that is, the brake, the value recognized by the signal comparing unit 102 is "1", otherwise the value is "0". When the speed value detected and input by the speed sensor 32 is greater than or equal to 10 km / h, which is a threshold value read from the storage device 60, the value becomes "1" and is less than 10 km / h. Has a value of 0 ". When the engine speed detected by the engine sensor 70 is equal to or greater than 3000 R.P.M, which is a threshold value read from the storage device 60, the value becomes "1", and when the engine speed is less than 3000 R.P.M, it has a value of "0".

The output value applied to the switching unit from the control signal output unit 103 is changed according to each sensing result. When the value of the output sensor DATA 1 of the acceleration sensor is "1", the user indicates the intention to accelerate, and thus, the switching state of the switching unit maintains the ON state to maintain the power applied to the ignition coil.

On the contrary, in the following cases, each switching unit is turned off to cut off the power applied to the ignition coil and the fuel injection device.

First, the engine has a R.P.M of 3000 or higher, a speed of 10km / h or higher, and brakes, even though the accelerator is not pressed.

Secondly, the engine has a R.P.M of 3000 or higher, a speed of 10km / h or higher, and no brakes, even when the accelerator is not pressed.

Third, the engine has a R.P.M of 3000 or more, a speed of 10km / h or less, and brakes, even though the accelerator is not pressed.

Fourth, even if the accelerator is not pressed, the engine has a R.P.M of 3000 or more, a speed of 10 km / h or less, and no brake.

The above example represents a case in which the engine control unit malfunctions even if the user's doctor does not want to start suddenly, and the engine speed exceeds 3000 RPM or the vehicle speed is 10 km / h or more. It is prevented from maintaining the acceleration state even when the motor is turned on or when braking is attempted. That is, the voltage applied from the power supply unit to the ignition device or fuel injection device in the engine is cut off at source.

However, when the value provided from the speed sensor 32 is 50 km / h or more, a situation in which the user can step on the brake light without the intention of accelerating while driving may sufficiently occur, which is output from the control signal output unit 103. The control signal maintains the ON state of the switching unit. In addition, the output value and the reference value of each sensor in [Table 1] are exemplary values for explaining the operation of the present invention, and in some cases, the reference value of RPM and the differential application of the variable resistors VR2 to VR5 of the respective circuits. The reference value for detecting the engine speed can be changed.

The concept of the present invention is to detect the accelerator, the braking device, the engine speed and the vehicle speed and to cut off the power applied to the ignition coil and the fuel injection device when it is determined that the detected result is the sudden start state in the sudden start prevention device. There will be no mention of the threshold being variable enough to take into account the vehicle or region.

In addition, in some cases, a sudden start and stop phenomenon may occur during driving, so that the power is cut off from the ignition coil and the injector while driving, and the vehicle is suddenly stopped to prevent an accident from occurring. Even if the user does not step on the accelerator, if the RPM suddenly increases and it is judged to be suddenly started, the power applied to the ignition coil and the injector is temporarily cut off, and the power is supplied again when the crank angle signal detection result reaches 1500 RPM. In order to prevent accidents caused by rapid start and stop while driving, the engine can be prevented from stopping while driving.

As described above, the present invention has an effect of preventing sudden start by detecting power when a factor of sudden start occurs against the user's intention and cutting off the power provided to the ignition device of the engine. By storing the occurrence details of the sudden start factors of the vehicle and the state information of each vehicle device, it has a useful value as data for the elimination of future sudden start factors. In addition, a sudden start phenomenon that may occur while driving has an effect of preventing the occurrence of an accident by temporarily blocking the rapid rotation of the engine.

Claims (9)

An ignition coil that generates sparks in the ignition apparatus using an induced voltage, Accelerometer sensor that detects the change in the accelerator and outputs the corresponding information as a digital value, An engine sensor for detecting engine speed and outputting a digital value of the comparison between the detected value and the threshold value; A speed sensor for detecting the rotational speed of the wheel and outputting a digital value of the comparison between the detected value and the threshold value; A brake device sensor for detecting a change in the brake device and outputting the corresponding information as a digital value; A controller for receiving information output from the accelerator sensor, the engine sensor, the speed sensor, and the brake device sensor and outputting a sudden oscillation control signal when it is determined that the engine is in a sudden start state according to the corresponding information; An injector for adjusting the injection timing of the fuel supplied to the engine, A first switching element for controlling power applied to the ignition coil according to a control signal output from the controller; And a second switching element for controlling power applied to the injector according to a control signal output from the controller. The method of claim 1; The controller When the driver does not indicate the intention to accelerate through the accelerator, when the engine speed is detected to be greater than or equal to the threshold value, the first switching element is driven to forcibly cut off the power applied to the ignition coil, and the second switching element is The driving device of claim 1, wherein the driving is forcibly cut off the power applied to the injector. The method of claim 2; And a power supply is cut off for 5 seconds by a control signal output from the controller to the first switching element and the second switching element. The method of claim 1; The first switching device and the second switching device is an automobile sudden start prevention device, characterized in that consisting of a relay (Relay) switch. The method of claim 1; The threshold value compared with the speed detected by the speed sensor is 10km / h, the threshold value compared with the engine speed detected by the engine sensor is 3000 R.P.M. The method of claim 1; The controller A signal input unit for receiving signals provided from a plurality of sensors; A signal comparing unit comparing the input signal provided through the signal input unit with a set threshold value; And a control signal output unit configured to output a control signal to the first switching element and the second switching element when the comparison result of the signal comparison unit corresponds to the sudden start state. The method of claim 1; And the controller is provided with information on the lever position state of the automatic transmission and the state of the auxiliary braking device. The method of claim 1; And a predetermined memory device for storing signals provided from each sensor is connected to the controller. The method of claim 8; And an interfacing unit capable of outputting information in the storage device to the controller.