JP3485205B2 - Brake lamp lighting control device for vehicle equipped with slope start assistance device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a braking lamp lighting control device for notifying a trailing vehicle of a braking operation, and particularly to a hill start assist device (Hill Start) for enabling easy hill start. Aid: hereinafter also referred to as HSA)
The present invention relates to a lighting control device for a braking lamp in a vehicle equipped with.

[0002]

2. Description of the Related Art In recent years, in automobiles, it has become possible to easily start up a hill on an automobile without requiring a sudden stepping operation from a parking brake or a brake pedal to an accelerator pedal, and at a traffic light or a traffic jam. HSA has been developed to reduce the fatigue caused by the brake operation by making the operation of continuously depressing the brake pedal unnecessary.

[0003] In addition, a conventional vehicle has a braking lamp to inform a succeeding vehicle that a braking operation has been performed. Some of the conventional braking lamps have an output from a brake valve. There is a braking lamp which is adapted to detect the pressure by the pressure detecting means and to be turned on by the detection signal.

As an example of a conventional brake control system provided with such an HSA and a braking lamp, there is a brake control system as shown in FIG. 3, for example. In addition to this brake control system, an anti-skid brake control (hereinafter also referred to as ABS) system that adjusts the braking force to prevent the braking wheels from being locked during braking, and the drive wheels tend to slip when starting or suddenly accelerating. In this case, a traction control (hereinafter, also referred to as TRC) system that prevents the drive wheels from slipping by operating the brakes of the drive wheels is integrated with the HSA.

As shown in FIG. 3, this brake control system adjusts the brake pressure of the wheel speed sensors 3 and 4 for detecting the wheel speeds of the left and right front wheels 1 and 2 which are non-driving wheels, and the front wheels 1 and 2. An ABS modulator 5, a brake actuator 6 that is a brake actuator that generates a brake pressure for braking the front wheels 1 and 2, left and right front and rear wheels 7 that are drive wheels,
ABS for adjusting the brake pressure of the wheel speed sensors 9 and 10 for detecting the wheel speed of the wheel 8, the front and rear wheels 7 and 8, and the left and right rear and rear wheels 7'and 8'which are non-driving wheels respectively for the left wheel and the right wheel. A brake actuator 1 corresponding to a brake actuator that generates a brake pressure for braking the modulators 11 and 12, the front and rear wheels 7 and 8 and the rear rear wheels 7'and 8 '.
3,14, open and close control by the brake pedal 15,
Dual brake valve 1 equivalent to the brake control valve
6. At the time of TRC, open the compressed air in the air tank 17,
Traction control valves (hereinafter also referred to as TRC valves) 18, 19 consisting of solenoid valves for feeding to the ABS modulators 11, 12 of the left and right front and rear wheels 7, 8 and rear rear wheels 7 ', 8', dual brake valve 16 Slope start assist valve consisting of solenoid valves that are provided on the downstream side of the vehicle and shut off the supply of the compressed air in the air tanks 17 and 17 'to the front wheel ABS modulator 5 and the rear wheel ABS modulators 11 and 12 at predetermined times. (Hereafter, HS
Also called A valve) 20, 21, each wheel speed sensor 3, 4,
Wheel speed signals are supplied from 9 and 10, and each AB
S modulators 5, 11, 12 and each TRC valve 1
ABS / TRC control unit (hereinafter also referred to as ABS / TRC ECU) 22 for controlling 8 and 19, a clutch stroke signal from a clutch stroke sensor 23, a clutch hydraulic pressure signal from a clutch switch 24, and a neutral signal from a neutral switch 25. , A parking brake signal from the parking brake switch 27, a door opening / closing signal from the door switch 28,
An HSA operation signal is supplied from the HSA operation switch 29, and an HSA control unit (hereinafter, also referred to as HSA ECU) 32 that controls the pilot lamp 30, the normally open HSA valves 20 and 21, and the buzzer 31 is provided. I have it.

Further, pressure switches 35 and 36, which are pressure detecting means for detecting the air pressure in the passages, are provided in the passage between the output side of the dual brake valve 16 and the input side of the HSA valves 20 and 21. These pressure switches 35 and 36 are provided in the braking lamp circuit 37 and connected to a normally open on / off relay 39 corresponding to the first opening / closing means for turning on / off the braking lamp 38. In addition, the stop lamp signal from the pressure switches 35, 36 connected to the HSA ECU 32 is EC
It is designed to be supplied to U32.

In the brake control system configured as described above, the compressed air from the dual brake valve 16 is converted into HS by operating the dual brake valve 16 by depressing the brake pedal 15 during braking.
A valve 20,21 and ABS modulator 5,11,
It is supplied to the brake actuators 6, 13 and 14 through 12 and the brake actuators 6, 13 and 14 generate braking hydraulic pressure. The braking hydraulic pressure generated by the brake actuators 6, 13, 14 is introduced into the brake cylinders (not shown) of the wheels 1, 2, 7, 7 ', 8, 8', and the brake cylinders of the wheels 1, 2, 7, Activate the 7,7 ', 8,8' brakes.

When the brake pedal 15 is depressed and the compressed air flows out from the dual brake valve 16, the air pressure of the compressed air is changed to the pressure switches 35 and 36.
Detected by. When the pressure switches 35 and 36 detect this air pressure, a detection signal is output, and the ON / OFF relay 39 is turned on and closed by this detection signal, so that the braking lamp 38 is connected to the power source and lights. This allows
The following vehicle knows that the vehicle in front performed the braking operation.

When the brake pedal 15 is released and the dual brake valve 16 is placed in the non-actuated position in order to release the braking, the compressed air supplied to the brake actuators 6, 13, 14 becomes the ABS modulators 5, 11 ,.
12 and HSA valves 20, 21 to the dual brake valve 16 to the atmosphere. This allows
Since the brake actuators 6, 13, 14 are deactivated, the braking hydraulic pressure of each brake cylinder is reduced and the brakes of the wheels 1, 2, 7, 7 ', 8, 8'are released.

When the compressed air of the brake actuators 6, 13, 14 is discharged from the dual brake valve 16, the pressure switches 35, 36 do not detect the air pressure of the compressed air and do not output a detection signal. Therefore, since the on / off relay 39 is turned off and opened, the braking lamp 38 is cut off from the power source and turned off. As a result, the following vehicle knows that the vehicle in front has released the braking operation.

The HSA operates as follows.
First, the HSA operation switch 29 is turned on and the parking brake is released. The release of the parking brake is detected by the parking brake switch 27, and the parking brake release signal is sent to the HSA ECU 32.
Sent to. Next, when the brake pedal 15 is depressed, compressed air is output from the dual brake valve 16, the pressure of the compressed air is detected by the pressure switches 35 and 36, and a brake actuation signal is sent from the pressure switches 35 and 36 to the HSA ECU 32. Supplied. In addition, compressed air is supplied from the dual brake valve 16 to the brake actuator 6 and the double check valve 3
It is supplied to the brake actuators 13 and 14 through 3, 34 to operate the brake. If the brake pedal 15 is continuously depressed for a predetermined time (eg, 1 second) or more, the HSA
The ECU 32 turns on and closes the HSA valves 20 and 21. As a result, the solenoid valve operates and the brake valve 16
The brake actuators 6, 13, 14 are cut off from each other, and as a result, the brake actuators 6, 13, 14 are kept at a pressure corresponding to the output of the brake valve 16.
At the same time that the HSA valves 20 and 21 are turned on, the HSA ECU
32 turns on the pilot lamp 30 and prompts the driver to HSA.
Notify that the valves 20 and 21 are on. The driver releases the brake pedal 15 by seeing the lighting of the pilot lamp 30, but the brake is maintained in the activated state. Further, in this state, even if the gear is set to neutral and the clutch is released, the brake is maintained in the operating state.

To open the HSA valves 20 and 21 by turning them off, (1) turn off the HSA operating switch 29 or (2)
The neutral switch 25 is turned off by a gear-in and the clutch switch 24 is turned off by a clutch connection, or the clutch stroke sensor 23 is turned by a half clutch.
Is turned off or (3) the parking brake is operated to turn on the parking brake switch 27. By these operations, HSA E
The CU 32 opens by turning off the HSA valves 20 and 21.
When the HSA valves 20 and 21 are opened, the compressed air supplied into the brake actuators 6, 13 and 14 becomes the ABS modulators 5, 11 and 12, and the HSA valve 2
It is discharged from the brake valve 16 through 0 and 21, and the brake is released. In the case of (2), it is carried out at the time of starting, and it is particularly effective when starting on a slope. Further, in the case of (3), the parking brake is surely applied.

Further, when the door switch 28 is turned on while the HSA valves 20 and 21 are turned on, that is, the door is opened, the HSA ECU 32 causes the buzzer 31 to operate.
Sounds to sound an alarm. This is H
This is to prevent the SA valves 20 and 21 from being used as parking brakes.

[0014] With such an HSA, it becomes possible to easily start on a slope without any need for a parking brake or an abrupt stepping operation from the brake pedal to the accelerator pedal, and it is also possible to use the brake pedal in a signal waiting state or in a congested road. It is not necessary to continue stepping on the brake pedal, and fatigue from braking can be reduced.

[0015]

However, in such a conventional brake control system, when the HSA valves 20 and 21 are turned off from the brake operation holding state when the HSA valves 20 and 21 are turned on, the brake actuator 6, Compressed air supplied to the inside of the brake valve 1 passes through the HSA valves 20 and 21.
6 will be discharged. At this time, the pressure switches 35 and 36 detect the pressure of the compressed air that is discharged, and the detection signal turns on the on / off relay 39 and turns on the braking lamp 38. Therefore, the following vehicle may mistakenly recognize that the preceding vehicle has performed the braking operation even though the preceding vehicle has not performed the braking operation.

The present invention has been made in view of such a problem, and an object thereof is to prevent the braking lamp from being turned on when the HSA valve is turned off from the brake operation holding state by the HSA valve. Accordingly, it is an object of the present invention to provide a braking lamp lighting control device for a vehicle, which is provided with a slope start assisting device capable of preventing the erroneous recognition of the braking operation by a following vehicle or the like.

[0017]

In order to solve the above-mentioned problems, the invention of claim 1 provides an air tank for storing compressed air, a brake actuator operated by supplying the compressed air, and A brake control valve that is provided between the air tank and the brake actuator and that controls the supply and discharge of the compressed air with respect to the brake actuator, and is disposed in a passage between the brake control valve and the brake actuator. It is installed to open when open to allow the compressed air to be supplied to and discharged from the brake actuator, and closed when open to block the flow of compressed air at least in the direction of the brake control valve and maintain the brake operating state. Slope assist valve, and the compressed air supplied to and discharged from the brake actuator in a passage between the brake control valve and the slope assist valve. Between the pressure detecting means for detecting the air pressure and outputting a detection signal, a braking lamp for indicating a braking operation by lighting, a power supply for lighting the braking lamp, and a power supply between the power supply and the braking lamp. Is arranged,
First opening / closing means for controlling turning on / off of the braking lamp by opening and closing in response to a detection signal from the pressure detecting means and opening / closing means for controlling on / off of the slope starting auxiliary valve In a control device for lighting a braking lamp in a vehicle equipped with an uphill assisting device including an electronic control device, a braking lamp can be turned on by closing between the opening / closing means of the braking lamp and the braking lamp when turned off. In addition, a second opening / closing means for opening the braking lamp to prohibit the lighting of the braking lamp is provided at the time of turning on, and the second means for assisting in starting the slope is provided to the second electronic control device for starting the slope.
A second opening / closing means control means for controlling the opening / closing means to be turned on for a predetermined time is provided.

Further, in the invention of claim 2, either of the output pressure of the brake control valve or the internal pressure of the brake actuator when the slope start assist valve is turned on and brought into a brake operation holding state for the certain period of time. It is characterized by being set based on. Further, the invention of claim 3 is
It is characterized in that the brake control valve is either a brake valve or a relay valve.

[0019]

In the present invention thus constituted, the second opening / closing means control means keeps the second opening / closing means constant when the slope starting assist valve is changed from the ON brake operation holding state to the OFF brake operation release state. Turn on and open only for a time. Thus, when the compressed air in the brake actuator is discharged from the brake control valve through the passage between the slope start assist valve and the brake control valve, the pressure detection means detects the air pressure of the compressed air flowing in this passage. Even if the first opening / closing means is turned on and then closed, the second opening / closing means is open, so that the braking lamp does not light up. Therefore, it is possible to prevent the erroneous recognition of the braking operation by the following vehicle or the like.

After a lapse of a certain time, the second opening / closing means control means turns off the second opening / closing means and closes it. At this time, most of the compressed air in the brake actuator has already been discharged from the brake control valve. Therefore, since the pressure detecting means does not detect the air pressure, the first opening / closing means is turned off and opened. Therefore, the braking lamp does not light up.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a brake control system to which an embodiment of a brake lamp lighting control device in a vehicle equipped with a slope starting assistance device according to the present invention is applied.
The same components as those of the brake control system shown in FIG. 3 described above are designated by the same reference numerals, and detailed description thereof will be omitted.

In the present embodiment, as shown in FIG. 1, in the braking lamp circuit 37, between the ON / OFF relay 39 of the braking lamp 38 and the braking lamp 38, the braking lamp 38 can be turned on by being closed. The second aspect of the present invention, in which
A normally-closed brake lamp lighting prohibition relay 40 corresponding to the opening / closing means is provided. The braking lamp lighting prohibition relay 40 is connected to a braking lamp lighting prohibition relay control device 32a provided in the HSA ECU 32, and is opened by an ON signal from the braking lamp lighting prohibition relay control device 32a. It has become. That is,
When the HSA ECU 32 turns the HSA valves 20 and 21 from ON to OFF, an ON signal is output to the HSA valves 20 and 21, and at the same time, the braking lamp lighting prohibition relay control device 32a outputs an ON signal to the braking lamp lighting prohibition relay 40. Is output for a certain period of time, and the ON signal causes the brake lamp lighting prohibition relay 40 to open for a certain period of time.

During this fixed time, most of the compressed air in the brake actuators 6, 13, 14 is discharged from the brake valve 16, and the pressure of the discharged compressed air is such that the pressure switches 35, 36 do not detect it. It is set to the time until. And this fixed time is
For example, it can be determined based on the output pressure of the brake valve 16 in the brake operation holding state or the air pressure in the brake actuators 6, 13, 14 in the brake operation holding state. In that case, on the output side of the brake valve 16 or the brake actuators 6, 13, 14
Needless to say, though not shown, it is necessary to provide a pressure sensor for each.

Therefore, the HSA valves 20 and 21 are switched from on to off, and the brake actuators 6, 13 and
Compressed air being supplied into the HSA valve 20,
When it is discharged from the brake valve 16 through 21
The pressure switches 35 and 36 detect the pressure of the discharged compressed air and output a detection signal, which is turned on.
Even if the off relay 39 is turned on and closed, the braking lamp lighting prohibition relay 40 is opened, and thus the braking lamp 38 is prevented from lighting.

In this embodiment, the HSA ECU 32 turns off and closes the brake lamp lighting prohibition relay 40 when a certain time has elapsed after outputting the ON signal to the brake lamp lighting prohibition relay 40. ing.
When this fixed time has elapsed, the compressed air in the brake actuators 6, 13, 14 has already been released into the brake valve 16
Most of it is discharged, and its pressure is almost atmospheric pressure. Therefore, the pressure switches 35 and 36 do not output a detection signal, and the braking lamp does not light even if the braking lamp lighting prohibition relay 40 is turned off and closed. This prevents the following vehicle from misrecognizing the braking operation.

Further, in the present embodiment, it is sufficient to provide the brake lamp lighting prohibition relay 40 and the brake lamp lighting prohibition relay 40 can be constituted by a relay having a simple structure. It does not require a significant design change, has a simple structure, and can be manufactured at low cost.

FIG. 2 is a diagram showing an example of a control flow of the brake lamp lighting prohibition relay. As shown in FIG.
In step S1, it is determined whether or not the HSA valves 20 and 21 are on, and when it is determined that the HSA valves 20 and 21 are not on, it is determined in step S2 whether or not the flag is set. . Since the flag is not set before the HSA valves 20 and 21 are turned on, it is determined in step S2 that the flag is not set, and in step S3, the brake lamp lighting prohibition relay 40 is turned off and closed.
In step S4, the brake lamp lighting prohibition relay 40
The timer of is reset and returns to the start. Therefore, when the pressure switches 35 and 36 detect the pressure, the braking lamp 38 comes on.

In step S1, the HSA valve 2
If it is determined that 0 and 21 are on, the flag is set in step S5, and then it is determined in step S6 whether the HSA valves 20 and 21 are off. That is, the brake control system is in the brake operation holding state, and it is determined whether or not the brake operation holding state is released. HSA valve 20,
If it is determined that 21 is not turned off, it means that the brake operation holding state is still maintained, and steps S3 and S4 are performed.
After performing each process of, the process returns to the start. In this state, in step S1, the HSA valves 20, 2 are again
It is determined whether or not 1 is on. However, at this time, since the HSA valves 20 and 21 are not off, the flag is held in the set state in step S5, and the process of step S6 is performed again. And HSA valve 2
Steps S1, S5, S6, S until 0, 21 are turned off
Each processing of 3 and S4 is repeated.

When the HSA valves 20 and 21 are turned off,
When the brake operation hold is released, it is determined in step S1 that the HSA valves 20 and 21 are not turned on, and it is determined in step S2 whether or not the flag is set. At this time, since the flag is set, the process proceeds to step 6 and the process of step S6 is performed again. HSA valve 2 in step S6
If it is determined that 0 and 21 are turned off, the flag is reset in step S7, the timer of the braking lamp lighting prohibition relay 40 is incremented in step S8, and then the braking lamp lighting prohibition relay 40 is incremented in step S9. It is determined whether the timer is less than the set time. If it is determined that the timer of the braking lamp lighting prohibition relay 40 is shorter than the set time, step S1
At 0, the brake lamp lighting prohibition relay 40 is turned on and opened. In this way, the brake operation holding state is released from the brake operation holding state, and the HSA E
The CU 32 turns on and opens the brake lamp lighting prohibition relay 40 at the same time as measuring the time. Therefore, even if the pressure switches 35 and 36 detect the pressure, the lighting of the braking lamp 38 is blocked.

Next, the process returns to step S8 again, and the processes from step S8 to step S10 are repeated until the timer of the brake lamp lighting prohibition relay 40 reaches the set time. That is, the brake lamp lighting prohibition relay 40 is held in the ON state until the set time has elapsed. If it is determined in step S9 that the timer of the brake lamp lighting prohibition relay 40 is not less than the set time, it means that the set time has elapsed since the HSA ECU 32 turned on the brake lamp lighting prohibition relay 40, and step S3 After performing the processes of S4 and S4, the process returns to the start.

In the above-mentioned embodiment, the present invention is applied to ABS.
The description has been made by applying it to the brake control system in which the system and the TRC system are integrally incorporated, but the present invention is not limited to this, and the ABS / TRC can be used as long as it has an HSA. It can also be applied to a brake control system without a system.

Further, in the above-mentioned embodiment, the present invention is applied to the brake control system provided with the brake actuators 6, 13 and 14 which act as compressed air by the compressed air to generate the brake pressure. The present invention is not limited to this, and can also be applied to a brake control system including an air chamber that operates by compressed air to generate a braking force as a brake actuator.

Further, in the above-mentioned embodiment, the brake valve 1
Although 6 corresponds to the brake control valve of the present invention, the present invention is not limited to this, and operates by the brake operation signal pressure from the brake valve to control the supply / discharge of compressed air to / from the brake actuator. The present invention can also be applied to a brake control system equipped with a relay valve. In that case, the relay valve constitutes the brake control valve of the present invention. Then, the fixed time for opening the brake lamp lighting prohibition relay 40 can be determined based on the air pressure in the air chamber in the brake operation holding state or the output pressure of the relay valve.

[0034]

As is apparent from the above description, according to the braking lamp lighting control device in the vehicle equipped with the slope starting assistance device according to the present invention, when the brake operation is released from the brake operation holding state, (2) Since the opening / closing means is opened for a certain period of time, when the compressed air in the brake actuator is discharged from the brake valve, the pressure detection means compresses the flow in the passage between the slope start assist valve and the brake control valve. Even if the air pressure of air is detected and the first opening / closing means is turned on and closed, the braking lamp does not light up. Therefore, it is possible to prevent erroneous recognition of the braking operation by the following vehicle or the like.

Further, according to the present invention, since it suffices to provide a simple opening / closing means such as a relay, it is not necessary to redesign the conventional brake control system, and the structure is simple and inexpensive to manufacture. You can

[Brief description of drawings]

FIG. 1 is a diagram showing a brake control system to which an embodiment of a brake lamp lighting control device in a vehicle equipped with a slope starting assistance device according to the present invention is applied.

FIG. 2 is a diagram showing a flow for controlling a brake lamp lighting prohibition relay.

FIG. 3 is a diagram showing a brake control system to which a braking lamp lighting control device is applied in a vehicle equipped with a conventional slope start assist device.

[Explanation of symbols]

1, 2 ... Front wheels, 5, 11, 12 ... Modulator for anti-skid control, 6, 13, 14 ... Brake actuator, 7, 8 ... Front and rear wheels, 7 ', 8' ... Rear rear wheel, 15 ... Brake pedal, 16 ... Dual brake valve, 17,1
7 '... air tank, 18, 19 ... traction control valve (TRC valve), 20, 21 ... hill start assist valve (HSA valve), 22 ... ABS / TRC control unit (ABS / TRC ECU), 32
… HSA control unit (HSA ECU), 3
2a ... Relay control device for prohibiting lighting of braking lamp, 35, 3
6 ... Pressure switch, 37 ... Brake lamp circuit, 38 ... Brake lamp, 39 ... ON / OFF relay, 40 ... Brake lamp lighting prohibition relay

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A 63-90469 (JP, A) JP-A 4-118343 (JP, A) JP-A 58-71231 (JP, A) JP-A 1- 262231 (JP, A) Actual development Sho 57-174252 (JP, U) Actual development Sho 60-127247 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B60Q 1/44 B60T 13 / 36

Claims (3)

(57) [Claims] 1. An air tank for storing compressed air, a brake actuator that operates by being supplied with the compressed air, and a brake actuator that is provided between the air tank and the brake actuator. wherein a brake control valve for controlling supply and discharge of compressed air, is disposed in the passage between the brake control valve and the brake actuator, the oFF
Open to supply the compressed air to the brake actuator.
A slope starting auxiliary valve that enables discharge and closes when turned on to block a flow of compressed air toward at least the brake control valve to maintain a brake operating state; the brake control valve and the slope starting auxiliary valve; The pressure supplied to and discharged from the brake actuator in a passageway between
Pressure detection means for detecting the air pressure of compressed air and outputting a detection signal, a braking lamp for indicating a braking operation by lighting, a power supply for lighting the braking lamp, the power supply and the braking lamp. A first opening / closing means, which is disposed between the first and the second opening means, is opened when it is turned off, and is turned on and closed by a detection signal from the pressure detection means to control turning on / off of the braking lamp; A lighting control device for a braking lamp in a vehicle equipped with a slope starting assisting electronic control device for controlling turning off, wherein a closing operation is performed between the opening and closing means of the braking lamp and the braking lamp when closed. Second opening / closing means for enabling the lighting of the braking lamp and for opening the braking lamp at the time of turning on are prohibited. The auxiliary electronic control unit is provided with second opening / closing means control means for controlling the second opening / closing means to be on for a predetermined time when the slope starting auxiliary valve is turned from ON to OFF. A lighting control device for a braking lamp in a vehicle equipped with an auxiliary device. 2. The slope starting assistance valve for the certain period of time.
The slope start assist according to claim 1, wherein the setting is made based on either the output pressure of the brake control valve or the internal pressure of the brake actuator when the brake is turned on to bring the brake operation hold state. A lighting control device for a braking lamp in a vehicle equipped with the device. 3. A lighting control device for a braking lamp in a vehicle equipped with a slope starting assist device according to claim 1, wherein the brake control valve is either a brake valve or a relay valve.