JPH072346Y2 - Control device for vehicle braking system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a control device for a vehicle braking device that controls the operation of a warning device that warns when a braking force holding mechanism of a vehicle is operating.

(Prior Art) When starting a vehicle from the middle of an uphill road, an electromagnetic check valve device is used as a braking force retaining mechanism to smoothly and easily start the vehicle without stopping the engine or moving the vehicle backward. A vehicle braking device has been developed that controls the flow path of the vehicle to maintain the braking force of the vehicle.

In this type of vehicle braking device, if the driver leaves the seat while the braking force is being held by the electromagnetic check valve device, it is dangerous because the driver cannot respond if the vehicle starts moving. Japanese Unexamined Utility Model Application Publication No. 61-59157 discloses a proposal for a seat away warning device for a vehicle braking device that activates an alarm device by a seat switch that detects the occurrence of a warning.

(Problems to be Solved by the Invention) In the proposal of the seat off warning device for a vehicle braking device disclosed in the above-mentioned Japanese Utility Model Publication No. 61-59157, the driver releases while the braking force holding mechanism is operating. When you sit down, a warning will be issued to alert the driver, but if you lift your body away from the driver's seat when the driver operates the car to move backward or adjusts the mirror, the driver will drive. Creates a problem for those who are confused.

The present invention has been made in view of the above-mentioned drawbacks, and an object thereof is to provide a control device for a vehicular braking device that appropriately controls the operation of a warning device that warns that the braking force holding mechanism is operating. is there.

(Means for Solving Problems) According to the present invention, a control electromagnetic check valve device is provided in a hydraulic fluid passage that communicates between a master cylinder that is linked to a brake pedal and a wheel cylinder. While the vehicle is stopped, the control electromagnetic check valve device is operated to maintain the brake braking state, and the seat switch for detecting that the driver has left the seat and the control electromagnetic check valve device are operating. In a control device for a vehicle braking device, which comprises a warning means for issuing a warning when the seat switch detects that the driver has left the seat in a state, a vehicle speed sensor for detecting a vehicle speed and a vehicle speed signal from the vehicle speed sensor have a predetermined value. A vehicle speed relay means that detects the following condition and issues an ON signal, and an ON signal when the seat switch detects that the driver has left the seat for a predetermined time. Provided is a control device for a vehicle braking device, comprising: a control processing means; and a warning operation means for operating the warning means by a logical product of an ON signal of the vehicle speed relay means and an ON signal of the control processing means. To be done.

(Operation) In the present invention, when the driver leaves the seat for a short time while holding the braking force, or when the vehicle leaves the seat at a speed higher than the predetermined vehicle speed, the warning device is deactivated and a warning is deliberately issued. It has the function of preventing operation.

(Example) Next, the Example of this invention is described in detail using drawing.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a circuit diagram of its main part.

In FIG. 1, reference numeral 1 is a master cylinder, which is linked to a brake pedal 11 and serves as a hydraulic source of a hydraulic brake mechanism when the brake pedal 11 is stepped on. The wheel 31 is braked via an electromagnetic check valve device 2. Wheel cylinder 3
Is supplied with hydraulic pressure.

The electromagnetic check valve device 2 has a check valve 21 and a solenoid valve 22. The check valve 21 allows hydraulic oil to pass in the direction of arrow A, but blocks the flow in the opposite direction of arrow A. The solenoid valve 22 is such that the hydraulic oil flow passage 10 is normally open, but is disconnected when energized. Therefore, due to the operation of the check valve 21 and the solenoid valve 22, the braking force due to the operation of the wheel cylinder 3 always changes in accordance with the hydraulic pressure change from the master cylinder 1 due to the depression of the brake pedal 11, but the solenoid valve 22 When the valve is energized, the flow path is cut off, so that the hydraulic pressure applied to the wheel cylinder 3 by the operation of the check valve 21 is maintained and the braking force of the wheel is maintained. A brake switch 12 detects the amount of depression of the brake pedal 11, and transmits the detected signal to a controller described later.

Reference numeral 4 denotes an engine, the supplied fuel is controlled according to the depression of the accelerator pedal 41, and the power of the engine 4 is transmitted to the transmission 5 via the clutch mechanism 42. 43 is an accelerator sensor that detects the amount of depression of the accelerator pedal 41, and 44 is a clutch sensor that detects the engagement state of the clutch mechanism, and sends the detected signals to the controller 6.

The transmission 5 is selectively controlled by the operation of a select lever (not shown) to switch the transmission gear stage, and the power of the engine 4 that has undergone the transmission control is transferred to the wheels 31 via the differential gear 32.
To drive the vehicle. Reference numeral 51 is a gear position switch for detecting the gear position of the transmission 5, 52
Is a vehicle speed sensor that detects the vehicle speed based on the number of rotations of the output shaft of the transmission 5, and sends detection signals to the controller 6 respectively.

A parking brake lever 7 applies a braking force to the wheels by a driver's operation during parking and includes a PB switch 71 for detecting the operation thereof. Reference numeral 8 is a seat switch provided in the driver's seat to detect the leaving of the driver. Signals from the seat switch 8 and the PB switch 71 are input to the controller 6.

The controller 6 is composed of a microcomputer, and is provided with a central control unit that performs arithmetic processing based on input signals from various sensors and switches, various memories that store arithmetic results, and an input / output device. The control command is transmitted to the control of the solenoid valve 22 and the warning device 9 on the basis of the calculation processing of. The central control unit also has a timer processing function. For example, when a signal from the seat switch 8 is input, the central processing unit is configured not to start the control processing unless the signal continues for a preset time. The time is freely selectable.

The warning device 9 emits a warning sound in response to a command from the controller 8 or lights a warning light to call the driver's attention.

In the sequence circuit diagram of the main part shown in FIG. 2, the warning device 9 includes a PB switch 71, a seat switch 8 and a vehicle speed relay.
The contacts of 52e are connected in series, and the PB switch 71 is turned on when the parking brake lever 7 is not operated, for example, when the parking brake is not being operated even while the vehicle is running or stopped, and the heat switch 8 is set by the driver. Although it is turned on when the user leaves the seat, as described above, when the time for leaving the seat is longer than a predetermined value, the circuit for operating the warning device 9 is turned on as shown in FIG. Also vehicle speed relay 52
e is configured to turn on, for example, when the vehicle speed is 2 KM / hour or less, and therefore, when the vehicle is traveling at 2 KM / hour or more per hour, the warning device 9 does not operate even if the driver leaves the seat. I am doing it. As shown in the figure, the vehicle speed sensor 52 is provided with a rotating magnetic pole and a reed switch, and the pulse signal and the signal from the reference vehicle speed signal device 52b are compared by the comparator 52c, for example, the reference vehicle speed is 2 KM / hour. Then, when the vehicle speed is lower than the reference vehicle speed, the transistor 52d is turned on and the vehicle speed relay 52e is turned on.
An electric current is passed through the exciting coil to turn on its contact.

FIG. 3 is a process flow chart showing an example of the operation of the present embodiment, and the process will be described with reference to FIG.

First, in step 1, the signal from the gear position switch 51 provided in the transmission 5 is read, and, for example, the traveling gear is the first
The speed is high, the signal from the clutch sensor 44 is in the clutch disengaged state in Step 2, the signal from the accelerator sensor 43 is in the state in which there is no depression amount in Step 3, and the signal from the brake switch 12 is in Step 4. If the signal indicates that the brake pedal has been depressed, the controller 6 issues a command to the electromagnetic check valve device 2 to close the electromagnetic valve 22 and prepare for energizing the warning device 9 (steps 5 and 6). . Even if the brake is not pressed in step 4, if the electromagnetic check valve device is already in operation in step 7, the process proceeds to steps 5 and 6 as described above.

Next, in step 8, the signal from the seat switch 8 is checked, and the signal of the state where the driver is away from the seat continues for a predetermined time t set in advance and the signal from the vehicle speed sensor 52 is equal to or lower than the set vehicle speed. Advances to step 11 to activate the warning operation means for turning on the warning device 9 to call the driver's attention (steps 9 to 11). If the signal from the seat switch 8 is short in step 9 or if the signal from the vehicle speed sensor 52 is equal to or higher than the set vehicle speed in step 10, the warning device 9 is inactive.

The present invention has been described above by using the embodiment in which the electromagnetic check valve device controls the braking hydraulic pressure as described above, but the pneumatic pressure for braking and the fluid pressure of the booster device are controlled within the scope of the gist of the present invention. The present invention can be applied to a braking force holding mechanism, and these applications and modifications are not excluded from the scope of the present invention.

(Effect of the Invention) According to the present invention, a seat switch for detecting the leaving of the driver, a timer for measuring the signal from the seat switch, and a vehicle speed sensor for detecting the vehicle speed are provided to maintain the braking force. When a signal from the seat switch is input during this period, the signal is inactive if the duration of the signal is short, and the warning device is activated only when the vehicle is slower than the set vehicle speed. No warning is issued even if the seat is lifted for a short time for the operation of backing or adjusting the mirror, which is effective in preventing malfunction of the warning device.

[Brief description of drawings]

FIG. 1 is a configuration block diagram showing an embodiment of the present invention, and FIG.
FIG. 3 is a sequence circuit diagram of the main part thereof, and FIG. 3 is a processing flow chart showing an example of the operation of this embodiment. 2 ... Electromagnetic check valve device, 6 ... Controller, 8 ... Sheet switch, 9 ... Warning device, 21 ... Check valve, 22 ... Electromagnetic valve, 52 ... Vehicle speed sensor.

Claims (1)

[Scope of utility model registration request] 1. An electromagnetic check valve device for control is provided in a hydraulic fluid flow passage communicating between a master cylinder and a wheel cylinder linked to a brake pedal, and the electromagnetic check valve device for control is provided while the vehicle is stopped. Is operated to maintain the brake braking state, and the seat switch detects that the driver has left the seat, and the seat switch allows the driver to leave the seat while the electromagnetic check valve device for control is operating. In a control device for a vehicle braking device, which comprises a warning means for issuing a warning when detected, a vehicle speed sensor for detecting a vehicle speed and an ON signal for detecting that a vehicle speed signal from the vehicle speed sensor is below a predetermined value. Vehicle speed relay means to emit,
The warning means is formed by a logical product of a control processing unit that generates an ON signal when the seat switch continues to detect the leaving of the driver for a predetermined time and an ON signal of the vehicle speed relay unit and an ON signal of the control processing unit. A control device for a braking device for a vehicle, comprising: a warning operation means for operating.