KR910000500B1 - Vehicle braking control system - Google Patents

Abstract

The circuit, mounted on automobile, controls operation of brake system and lighting lamps required for conditions. The circuit performs automatic switching of head lamp and detecting the disorder of speed sensor. The circuit includes a switch section having headlamp switch (S1), main switch (S2), auto switch (S4), starting switch (S5).; input signal processing section having speed detector (1), power supply earths (8,9,10); a logic gae having AND gates (AND1-AND4), OR gate (OR2) and inverters (IV1-IV3); a control signal output section having delay circuits (11,17,19); a control display section having brake warning lamp, tail lamp, etc.

Description

Control Circuit of Automobile Braking System

1 is a control circuit diagram of a vehicle braking apparatus according to an embodiment of the present invention.

2 is a circuit block diagram showing the output of each circuit part in the forward phase gradient braking operation in the AUTO mode.

Fig. 3 is a circuit block diagram showing the output of each circuit part in the reverse phase slope braking operation in the AUTO mode.

Fig. 4 is a circuit block diagram showing the output of each circuit part in the constant braking operation in the AUTO mode.

Fig. 5 is a circuit block diagram showing the output of each circuit part in the forward slope tilt braking operation in the one touch mode.

Fig. 6 is a circuit block diagram showing the output of each circuit part in the reverse phase slope braking operation in the one touch mode.

FIG. 7 is a circuit block diagram showing the output of each circuit unit in the normal braking operation in the one touch mode.

8 is a circuit block diagram showing the output of each circuit part during the releasing operation while driving.

Fig. 9 is a circuit block diagram showing the output of each circuit part in the release operation during parking.

10 is a circuit block diagram showing the output of each circuit part when the brake indicator light is turned off when mechanical release is performed.

FIG. 11 is a circuit block diagram showing the output of each circuit section when the headlamp is automatically turned off.

* Explanation of symbols for main parts of the drawings

1: Speed detector 2, 8, 9, 10: Supply power ground

3,4,5,6: voltage divider circuit 11,17,19: delay circuit

12: constant voltage generator 13: braking solenoid drive unit

14: oscillation control unit 15: oscillation unit

16: braking indicator driving unit 18: buzzer and buzzer driving unit

20: Solenoid drive unit for braking release 21: Relay (RY)

AND1 to AND4: AND gate B: battery

C1 to C38: Capacitors D1 to D3: Diodes

IV1 to IV5: Inverter IC1, IC4: Comparator

IC2: IC for constant voltage IC3: IC for oscillation

IC5: Timer IC L1: Braking Indicator

L2: Brake Light L3: Reverse Light

L4: Headlamp LD: Light emitting element

ND1 to ND13: NAND gate OR1, OR2: OA gate

Q1-Q11: transistors R1-R73: resistors

S1: Headlight switch S2: MAIN switch

S3: One touch switch S4: AUTO switch

S5: Start switch S6: Braking switch

S7: Reverse switch S8: Neutral switch

S9: Clutch Switch S10: Parking Switch

S11: Headlight auto switch 6B: STEEL BALL

DS: Light receiving element SL1: Solenoid for braking

SL2: Solenoid for braking release SP: Speed sensor

T1, T2, T3: T.N.R

[Use of invention]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control circuit of a braking device to be installed in a motor vehicle, and more particularly to a control circuit of a motor vehicle braking device for controlling the operation of an equalizer and other parts of the braking device according to each situation during a vehicle braking.

Conventional Technology and Issues

In general, when a driver rides on a flat surface and tries to stop (brake) a car, the driver presses both the brake pedal and the clutch pedal at the same time, or the gear is in a neutral position. When the vehicle is stopped, the vehicle is stopped by only stepping on the brake pedal. In this case, the brake light indicating the stop of the vehicle is turned on at the same time.

On the other hand, when starting a stationary car, the gear starts to be released by shifting the gears, releasing the braking pedal and slowly releasing the clutch pedal while pressing the accelerator pedal. In this case, the hydraulic pressure applied to the braking device is released. In addition, the braking lights are turned off. In addition, when parking a car or trying to stop for a long time, first stop the car by stepping on the brake pedal, pull the side break, then release the brake pedal, and then start the car again. In this case, the car can be started by releasing the parking brake and slowly releasing the clutch pedal while pressing the accelerator pedal.

If the driver stops the car for a while while the vehicle is going uphill, and tries to start again, the driver starts the brake pedal, releases the brake pedal, and simultaneously releases the clutch pedal while pressing the accelerator pedal.

However, in the case of the conventional braking, when the driver stops the car for a while on the way up the road and starts the car again, the engine of the car stops when the driver releases the clutch pedal quickly. On the contrary, if the clutch pedal is released later, the driver may reverse the vehicle and cause an accident or a rollover accident with the rear vehicle, and thus, the driver's expert driving skills and advanced skills are required.

In addition, during the night driving of the car, the headlights must be turned off every time the vehicle is stopped at a pedestrian crossing, and the headlights must be turned on again when the vehicle is restarted, especially when the vehicle is stopped and then started again. Always put the gear in the gear pedal and press the pedal pedal, you need to perform the cumbersome way, and while driving the brake pedal to decelerate the speed of the car, and then to increase the speed of the car again, after the gear shift, the accelerator pedal was pressed. In this case, as well as the unnecessary current is consumed for a predetermined time by the release solenoid, there was a problem that the operation sound at the time of braking and releasing is made loud by using the relay.

[Purpose of invention]

Accordingly, the present invention has been invented in view of the above situation, and the braking method of the vehicle is realized by the manual braking method (one-touch function) to improve the braking method, and the automatic flashing of the headlights at night driving and the failure detection of the speed sensor are automatic. It is an object of the present invention to provide a control circuit of a vehicle braking device to be performed.

[Configuration of Invention]

The control circuit of the automobile braking device according to the present invention for realizing the above object is a switch unit consisting of a headlight switch and the main switch, one-touch switch, auto switch, brake switch, neutral switch, clutch switch, parking switch and the headlight automatic switch; Input signal processing section consisting of speed detecting section, power supply grounding section, voltage divider, slope detection section and delay circuit, logic gate section consisting of end gate and NAND gate, ora gate and inverter, delay circuit and constant voltage section, braking solenoid driving section, oscillation Control unit, oscillator, brake indicator driver, buzzer and buzzer driver, release solenoid driver, control signal output composed of relay and solenoid, and control status indicator composed of brake indicator, brake lamp, reverse lamp and headlight It is.

EXAMPLE

1 is a circuit diagram showing a control circuit of a motor vehicle braking apparatus according to an embodiment of the present invention having the above-described configuration.

In FIG. 1, reference numeral 1 denotes a speed detecting part including a speed sensor SP, a lead contact RD, resistors R1, R2, R12, capacitors C1, C2, and a diode D1, which is a speed sensor. Due to the lead contact RD, which is turned on and off by the rotation of SP, that is, when the contact is in the on state, the current from the power supply potential causes the resistor R1 and the diode D1 and the lead contact ( When RD) is in the OFF state, current from the power supply potential flows through the resistors R1 and R2, thereby outputting a high level (hereinafter, referred to as "H" level) to the output terminal.

Reference numeral 2 is a supply power grounding portion consisting of resistors R13 and R14, a diode D2, and capacitors C7 and C7 ', which is one of the one touch switch S3 and the NAND gate ND1. Connected to an input terminal and outputs an "L" level to the NAND gate ND1 when the one-touch switch S3 is in an ON state, and the NAND gate (S3) when the one-touch switch S3 is in an OFF state. ND1) outputs the "H" level.

Reference numeral 3 denotes a voltage divider circuit composed of resistors R15, R16, and R17, capacitors C3 and C9, and diode D3. The input terminal is connected to an auto switch S4 and the output terminal When the haute switch S4 is turned on and is connected to one input terminal of the OR gate OR1, the resistor R15 receives an "H" level signal from the battery B power supplied through the auto switch S4. The voltage and voltage drop are reduced by R16 and R17 and the diode D3 to output the " H " level to the OR gate OR1, and when the auto switch S4 is in the OFF state, the " L " The level is output to the oragate OR1.

Further, reference numerals 4 to 6 are also divided voltage circuits having the same configuration as the above-mentioned voltage divider circuit 3, which are each " H " when the start switch S5, the brake switch S6 and the reverse switch S7 are turned on. The level is output, and when the switches S5 to S7 are turned off, the level is output.

In addition, reference numerals L2 and L3 are brake lights and reverse lights installed between the brake switch S6 and the reverse switch S7 and the ground, respectively, which are turned on when the switches S6 and S7 are turned on, It indicates the reverse status.

Next, reference numeral 7 is composed of resistors R27 to R31, capacitors C16 and C17, steel balls 6B, light emitters LD, light receivers DS, and transistors Q3 to tilt the vehicle. An inclination detection unit configured to output a signal according to a state, which has an input terminal connected to the start switch S5 through a diode D5 and an output terminal of each of the other input terminals of the NAND gate ND3 and the OR gate OR2. When the start switch S5 is in the on state, the iron ball 6B is light-emitting according to the position of the iron ball 6B corresponding to the inclined state of the vehicle, that is, at the time of the forward inclination. Since the transistor Q3 is turned on to output the "L" level between the LD and the light receiver DS, the iron ball 6B is configured to emit light from the light emitter LD and the light receiver during reverse phase tilt. The transistor Q3 is turned off, La "H", and outputs the level.

Reference numeral 8.9 denotes a power supply grounding portion having the same configuration as the power supply grounding portion 2, which outputs an "L" level when the neutral switch S8 and the clutch switch S9 are turned on. When the switches S8 and S9 are turned off, the "H" level is output.

Reference numeral 10 denotes a power supply grounding portion consisting of resistors R36 to R39, capacitors C22 to C24, diodes D10 and transistors Q4, which have an input terminal connected to ground via parking switch S10. When the input terminal of the output terminal is connected to the other input terminal of the NAND gate ND7 connected to the output terminal of the voltage dividing circuit 4 through the inverter IV1, and the parking switch S10 is in the on state, The "H" level is output, and when the parking switch S10 is in the OFF state, the "L" level is output.

Reference numeral 11 denotes a delay circuit composed of resistors R3 to R11, capacitors C3 to C6, NAND gate ND13, comparator IC1, inverters IV4 and IV5, and transistors Q1 and Q2. This means that an input terminal is connected to the speed detecting unit 1 and an output terminal is connected to one input terminal of the relay RY and the AND gate AND3, so that the relay RY and the output signal are output according to the output signal of the speed detecting unit 1. The AND gate AND3 is controlled.

In other words, when the output signal of the speed detector 1 changes to the "H" level, the delay circuit 11 becomes the "L" level, so that the output of the resistor R4 and the capacitor C4 When the "L" level signal is input to one input terminal of the NAND gate ND13 during the predetermined delay time corresponding to the time constant, and the output of the speed detector 1 changes to the "L" level, the inverter IV5. ) Outputs to the "L" level, and at this time, the "L" level is input to the other input terminal of the NAND gate ND13 for a predetermined delay time by the resistor R3 and the capacitor C3. Therefore, when the speed of the vehicle becomes higher than a predetermined speed (for example, 6 RPM) and the speed sensor SP rotates rapidly, and the output level of the speed detector 1 is rapidly stirred, the output of the NAND gate ND13 is continuously maintained. The output of the comparator IC1 becomes the " L " level by being kept at the " H " level so that the capacitor C5 is continuously charged with a predetermined charge or more.

On the other hand, when the speed of the vehicle falls below a predetermined speed (6 RPM or less), the state in which the output of the NAND gate ND13 is "L" becomes longer than the time in which the output of the "H" state becomes longer, so that the capacitor C5 ), The charge that has been charged is continuously discharged so that the output of the comparator IC1 is in the "H" level state.

Further, reference numeral L4 is inserted between the relay RY and ground and is connected to a coil of the relay RY controlled according to the conduction state of the transistor Q2, and S11 is one of the headlight switches S1. ) And the headlight which the on / off is controlled by the relay RY, and S1 is a headlight switch connected to the battery B while one side is connected to the coil of the relay RY, and one side is S11. Is connected to the connection point of the headlight switch (S1) and the relay (RY), the other is a headlight automatic switch connected to the coil of the relay (RY), 12 is connected to the battery (B) through the main switch (S2) It is a constant voltage part that supplies a certain voltage to each part of the circuit.

Reference numeral 13 denotes a braking solenoid driver composed of resistors R43 to R47, transistors Q5 and Q6, and TNR element T2, which has an input terminal via an inverter IV2 and an output terminal of the NAND gate ND8. In addition, the output terminal is connected to the ground through the braking solenoid SL1 to supply power to the braking solenoid SL1 when the output of the NAND gate ND8 is at the "L" level.

Reference numeral 14 denotes an oscillation control unit consisting of resistors R48 to R51, capacitors C29 and C30, and NAND gates ND11 and ND12, wherein one input terminal is connected to an output terminal of the NAND gate ND8. Is connected to the output terminal of the AND gate AND4, and its output terminal is connected to one input terminal of the NAND gate ND10, so that an oscillation signal corresponding to the output of the NAND gate ND8 and the AND gate AND4 is supplied to the NAND gate (AND). ND10).

That is, when the output of the NAND gate ND8 is at the "L" level, the oscillation control unit 14 generates an "L" level trigger pulse by the resistor R48 and the capacitor C29 at the input terminal of the NAND gate ND11. Since the input of the NAND gate ND11 is at the "H" level, when the output of the AND gate AND4 is at the "H" level, the "N" level signal is output as the output signal. .

Reference numerals 15 and 16 denote oscillation and braking indicator driving portions composed of resistors R52 to R55 and R73, capacitors C31 to C33 and C39, oscillation IC (IC3), and transistor (Q7). One input terminal is connected to the output terminal of the NAND gate ND10 connected to the output terminal of the NAND gate ND9, and the output terminal is connected to the battery B through the brake indicator L1 and the start switch S5. When the output level of the oscillation control unit 14 is at the "L" level, the power supply to the brake indicator L1 by the battery B is interrupted to make the brake indicator L blink. do.

Reference numeral 17 denotes a delay circuit composed of resistors R56 to R61, a capacitor C34, a diode D13, a transistor Q8, and a comparator IC4, in which an input terminal at an output terminal is a delay circuit 11 and the The other input terminal of the NAND gate ND9 connected to the connection point of the AND gate AND3 is connected, and the connection of the AND gate AND3 and the NAND gate ND6 is connected to the input terminal, whereby the NAND gate ND6 is connected. When the output of L is at the "L" level, the "H" level is output after a predetermined time for the charge of the capacitor C34 to pass.

Reference numeral 18 denotes a buzzer and a buzzer driver composed of resistors R62 to R64, a transistor Q9, a capacitor C35, and a buzzer B2, which have an input terminal via the inverter IV3 to the NAND gate ND9. In addition to being connected to the output terminal of the coupled to the constant voltage generating unit 12, the warning buzzer sounds in the event of failure of the speed sensor (SP).

Reference numeral 19 denotes a delay circuit composed of capacitors C36 to C38, resistors R65 to R67, and a timer IC IC5, which has an input terminal connected to an output terminal of the AND gate AND3, and an output terminal is released. When the output of the AND gate AND3 is at the "L" level when the output is connected to the solenoid driving unit 20, the timer IC IC5 is triggered so that the braking releasing solenoid driving unit 20 raises the "H" level. Will be printed.

Reference numeral 20 denotes a braking releasing solenoid driver composed of resistors R68 to R72, transistors Q10 and Q11, and TNR T3, which is connected to an output terminal of the delay circuit 19 and an output terminal. The brake release solenoid SL2 is connected to the ground, and when the output of the delay circuit 19 is at the "H" level, the brake release solenoid SL2 is driven to release the brake hydraulic pressure.

Meanwhile, in FIG. 1, the AND gates AND1 to AND4, the NAND gates ND1 to ND10, the OR gates OR1 and OR2, and the inverters IV1 to IV3 form a logic gate portion, and the speed detection unit 1 and the supply power supply. A delay circuit based on an output signal from an input signal processing section consisting of a ground section (2, 8, 9, 10), voltage divider circuits (3, 4, 5, 6), an inclination detection section (7), a delay circuit (11), and the like. (11, 17, 19), constant voltage section 12, braking solenoid drive section 13, oscillation control section 14, oscillation section 15, braking indicator driving section 16, buzzer and buzzer driving section 18, for release The control signal output unit including the solenoid driving unit 20, the relay RY, the solenoids SL1, SL2, and the like is controlled. Hereinafter, the operation of the first circuit according to the present invention will be described based on the operation of the logic gate unit. It explains in detail.

FIG. 2 is a circuit block diagram showing the output state of each circuit part in the forward inclined braking operation in the auto mode. When braking the vehicle forward on a sloped road, the brake and clutch pedals are pressed. The main switch S2 and the auto switch S4, the start switch S5, the brake switch S6 and the clutch switch S9 are turned on.

Therefore, as described above, when the output of the voltage divider circuits 3, 4 and 5 is at the "H" level and the rotation speed of the speed sensor SP is lowered to 6 RPM or less, the output from the delay circuit 11 is reduced. It is also at the "H" level, and the "L" level is output from the supply power supply grounding section 9, the voltage dividing circuit 6, and the inclination detection section 7. FIG. Therefore, since the outputs of the NAND gate ND4 and the NAND gate ND5 are at the "H" level, the output from the AND gate AND2 is at the "H" level, so that all the input terminals of the NAND gate ND8 are "H". The level is set to output the "L" level from the NAND gate ND8.

Subsequently, the "L" level output from the NAND gate ND8 is supplied to the oscillation control unit 14 and inverted to the "H" level by the inverter IV2 and then supplied to the braking solenoid drive unit 13. As a result, the braking solenoid driving unit 13 operates to supply current to the braking solenoid SL1 so that the brake is automatically operated, while the oscillation unit is controlled by the "L" level output from the oscillation control unit 14. The "H" level is applied to 15 so as to stir between the "H" and "L", thereby causing the braking indicator L1 to blink. That is, the driver can then rest from the brake.

3 is a circuit block diagram showing the output state of each circuit unit in reverse braking operation in auto mode, in which case the main switch S2, the auto switch S4, the start switch S5, the braking switch S6, and the reverse The switch S7 and the clutch switch S9 are turned on. In this case, therefore, the output of the voltage dividing circuit 6 is at " H " level, unlike at the time of forward phase inclination braking operation, but the output from the inclination detection unit 7 is also at " H " level so that the output of the NAND gate ND3 is maintained. Since it becomes the "L" level as in the above-mentioned forward tilt operation, the braking operation at this time is the same as during the advance tilt operation braking.

4 is a circuit block diagram showing the output state of each circuit unit in the normal braking operation in the auto mode, in which the main switch S2, the auto switch S4, the start switch S5, the braking switch S6, and the neutral state. The switch S8 and the clutch switch S9 are in the on state.

In this case, therefore, the output of the NAND gate ND4 is set to the "H" level by the "L" level output from the supply power supply grounding section 8, so that the above-mentioned forward tilt braking operation and backward reverse tilt braking operation are performed. Similarly, since all inputs of the NAND gate ND8 are at the "H" level, the vehicle is braked by the same operation as described above, and the brake indicator L2 blinks.

As described above, in the auto mode, once the vehicle is stopped by the driver's brake operation, the braking solenoid SL1 is driven to operate the brake automatically. Therefore, even on a sloped road, the driver takes his foot off the brake pedal. You can relax.

FIG. 5 is a circuit block diagram showing the output of each circuit part in the forward inclination braking operation in the one-touch mode. In this case, the one-touch switch S3 is turned on while the auto switch S4 is turned off. S1, S2, S5 to S11 are in the same state as in the above-described auto mode. Therefore, at this time, the output of the power supply grounding section 2 is at the "L" level, so that all the input terminals of the NAND gate ND8 are at the "H" level as in the above-described auto mode. That is, the same operation as in the auto mode is performed.

Furthermore, when the one-touch switch S3 is turned on once, the output of the NAND gate ND8 becomes the "L" level, and then the "L" level output of the NAND gate ND8 is again the NAND gate ND1. ), The "H" level is continuously output from the NAND gate ND1. In other words, the one-touch switch S3 is temporarily turned on and then turned off to achieve the same effect as when the auto switch S4 is used.

6 and 7 show the output of each circuit unit in the reverse phase slope braking operation and the constant braking operation in the one-touch mode, and in this case, by pressing the one-touch switch S3 once to make it on for a while. The same effect as in reverse braking and constant braking can be obtained.

FIG. 8 shows each circuit part output signal during the driving release operation. In this case, the driving release operation means a case where the driver stops the vehicle and then starts the vehicle again.

That is, in this case, since the driver releases the clutch pedal while pressing the accelerator pedal, the neutral switch S8 and the clutch switch S9 are turned off while the main switch S2 and the start switch S5 are kept in an on state. Therefore, the output of the supply power supply grounding part 8 (9) becomes the "H" level, and the output of the NAND gate ND6 becomes the "L" level, so that the output of the AND gate AND3 becomes the "L" level. It becomes

Then, the "L" level output of the AND gate AND3 is applied to the delay circuit 19, whereby the delay circuit 19 causes the "L" level output by the resistor R65 and the capacitor C36 as described in FIG. The timer IC IC5 is triggered by the L " level pulse to output the " H " level. Accordingly, the release solenoid driver 20 is operated to flow a current through the release solenoid SL2. That is, the vehicle is driven with the braking state released.

In addition, when the braking switch S6 is turned off, the "H" level is output from the NAND gate ND8. As a result, the "L" level is input to the braking solenoid driving unit 13, whereby the braking solenoid SL1 is input. As the power supply to the furnace is cut off, the driving state of the vehicle is safely maintained. Further, the "L" level is output from the AND gate AND4 by the "L" level output from the AND gate AND3, and the "H" level is output from the oscillation control section 14, while the running speed of the vehicle is increased. For example, when it becomes 6 RPM or more, the "L" level is also output from the NAND gate ND9 by the "L" level output from the delay circuit 11, so that the "L" level is input to the oscillation unit 15, thereby oscillating. The IC IC3 is reset so that the "L" level is output from the oscillator 15. Accordingly, the brake indicator L1 is turned off by turning off the transistor Q7 at the output terminal of the brake indicator driver 16.

9 is a circuit block diagram showing the output of each circuit part in the case of the parking release operation. In this case, the main switch S2 and the parking switch S10 are turned on. Accordingly, the output of the NAND gate ND7 is " L "level is reached. As a result, the output of the AND gate AND3 is at the "L" level, so that the current flows in the release solenoid SL2 as described above, so that the brake hydraulic pressure is released to protect the vehicle, and the oscillation control unit ( The oscillation IC IC3 of 14 is reset and the braking indicator L1 is turned off.

10 is a circuit block diagram showing the output of each circuit part when the operation indicator light is turned off when the mechanical release is performed.When the brake control device is solved with only the brake pedal, the clutch pedal is pressed in the gear neutral, the reverse gear is put in, and the brake pedal is released. If you step on the clutch pedal at the forward or downward slope, insert the forward gear, press the brake pedal, and then release the mechanical pedal.

As described above, when the vehicle is in the braking state as described above, the outputs of the NAND gates ND8 and AND3 are at the "H" level, in which the driver shifts the gear from the neutral position and brake pedal. When the step is pressed, the neutral switch S8 is turned off and the brake switch S8 is turned on. Therefore, as described above, the "H" level output from the battery B power supply through the voltage dividing circuit 5 is applied to the AND gate AND4. Therefore, the "L" level pulse of the resistor R50 of the oscillation control unit 14 and the capacitor C30 is input to the NAND gate ND12 in response to the "L" level output of the AND gate AND4. The output of ND12 is inverted to the " H " level to be input to the NAND gate ND10. At this time, when the speed of the vehicle is 6 RPM or more, the "H" level is also output from the NAND gate ND9 by the "L" level output from the delay circuit 11, so that the NAND gate The output is inverted to the "L" level to reset the oscillator 15. Therefore, the transistor Q7 of the brake indicator driving unit 16 is turned off and the brake indicator L1 which is flashing is turned off. In addition, as described above, the current is supplied to the release solenoid SL2 by the "L" level output from the AND gate AND3, thereby performing mechanical release.

11 is a circuit block diagram showing the output of each circuit portion when the headlight auto power off, and when the headlight switch S1 is turned on, when the headlight auto switch S11 is turned on, the speed detection section 1 When the speed of the speed sensor SP falls below 6 RPM, the transistor Q2 is turned on and current flows in the relay RY, so that the headlamp L4 is turned off, and the rotation speed of the speed sensor SP is reduced again. When it is 6 RPM or more, the transistor Q2 is turned off so that no current flows to the relay RY, so that the headlamp L4 is turned on again.

Therefore, the headlights do not need to be turned on or off depending on the driving state of the vehicle during night driving.

On the other hand, when the speed sensor SP is broken (for example, the speed of the vehicle is detected by the ORPM), the rotation of the speed sensor SP becomes the same as that of 6 RPM or less. H "level is output, and this" H "level output is input to one input terminal of the NAND gate ND9, and when the neutral switch S8 and the clutch switch S9 are turned off, the NAND is as described above. The "L" level is output from the gate ND6 so that the output is applied to the base of the transistor Q8 in the delay circuit 17, so that the transistor Q8 is turned off.

Accordingly, the "H" level signal of the constant voltage unit 12 is charged to the capacitor C34 through the resistor R58. When the charged voltage becomes higher than the divided voltage by the resistors R59 and R60, the comparator ( The "H" level signal output from IC4) is input to the other input terminal of the NAND gate ND9, so that the "L" level is output from the NAND gate ND9. Then, the "L" level output from the NAND gate ND9 is input to the NAND gate ND10, and the inverted "H" level output sets the oscillation section 15 as described above. Accordingly, the braking indicator driving unit 16 is driven again so that the braking indicator L1 blinks while driving. In addition, the "L" level output of the NAND gate ND9 is inverted to the "H" level through the inverter IV3 and then applied to the base of the transistor Q9. Accordingly, the transistor Q9 is turned on. At the same time, the buzzer B2 operates to warn the driver of the failure of the speed sensor SP.

[Effects of the Invention]

As described above, according to the present invention, it is possible to obtain the same effect as using an auto switch by only turning on and off one touch switch without using an auto switch, and when driving at night, It is possible to automatically turn the headlights on and off, and to realize a control circuit of a vehicle braking device that warns the driver of a failure in case of a failure of the speed sensor.

Claims (1)

Headlight switch (S1), main switch (S2), auto switch (S4), start switch (S5), brake switch (S6), reverse switch (S7), neutral switch (S8), clutch switch (S9), parking switch (S10) and a headlight switch (S11) and the like, a speed detecting unit (1), a power supply grounding unit (8, 9, 10), a voltage divider circuit (3, 4, 5, 6), a tilt detecting unit (7) and an input signal processing section composed of a delay circuit 11 and the like, logic composed of an AND gate AND1 to AND4 and a NAND gate ND2 to ND10, an OR gate OR2, and an inverter IV1 to IV3, and the like. Gate section, delay circuits 11, 17, 19 and constant voltage section 12, braking solenoid drive section 13, oscillation control section 14, oscillation section 15, braking display lamp driver section 16, release solenoid driver section (20), a control signal output section consisting of a relay (RY) and solenoids SL1, SL2, etc., a control consisting of a braking indicator (L1) and a braking lamp (L2), a reversing lamp (L3) and a headlamp (L4). Status display In the control circuit of the brake system, which is configured to be pulled down, the other input terminal of the AND gate AND1 connected to the output terminal of the voltage dividing circuit 4 for outputting a predetermined signal according to the on / off of the start switch S5 is An output terminal of the NAND gate ND1 is connected through an orifice OR1 connected to the auto switch S4 through the voltage dividing circuit 3, and a supply power supply grounding portion 2 is connected to an input terminal of the NAND gate ND1. The one-touch switch S3 is connected through the connection, and the connection point between the NAND gate ND8 and the braking solenoid drive unit 13 is connected, so that the one-touch switch S3 is turned on and off once. Has the same effect as in the on state, and the output terminal of the NAND gate ND6 to which the neutral switch S8 and the clutch switch S9 are connected to the input terminal through the supply power grounding parts 8 and 9, respectively. A delay circuit 17 is connected, The output terminal of the delay circuit 17 is connected to one input terminal of the NAND gate ND9 to which the delay circuit 11 for outputting a predetermined signal according to the output signal from the speed detection unit 1 is connected. The output terminal of the NAND gate (ND9) is connected to the buzzer and the buzzer driving unit (18) through an inverter (IV3), the control circuit of the automobile brake system, characterized in that configured to warn the driver of the failure state of the speed sensor (SP).

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