JPS5871252A - Car brake unit - Google Patents

Abstract

PURPOSE:To improve the safety of a parking brake by continuing an auxiliary parking brake even when an ignition switch is turned off and by warning a driver of this status so as to urge him to quickly change to a main parking brake. CONSTITUTION:Under a predetermined brake hold condition, the exciting current is output from a brake lock circuit 12, exciting an electromagnetic solenoid 10, and a foot brake is held at a brake position. The circuit 12 is directly connected to a battery 16 without going through an ignition key switch 14. In addition, warning circuits 26, 28 are operated by means of the exciting current of the circuit 12 and an alarm unit 24 is activated, thus telling that the hold lock of a brake pedal is maintained. The operation of the circuit 12 is released by an accleration signal 100 or the main parking brake signal of a release circuit 30.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a vehicle braking system, and more particularly to a vehicle braking system capable of electromagnetically locking a brake pedal to perform an auxiliary parking braking action.

Braking devices for vehicles include foot brakes, which decelerate and stop a running vehicle by operating the brake pedal, and parking brakes, which prevent a stopped vehicle from starting.
These can be used depending on your safety, but the foot brake can be temporarily locked in a predetermined braking state by electromagnetic means such as a heavy cannon solenoid, so that even if the driver takes his foot off the foot brake, the foot brake remains in place. Devices for performing auxiliary parking braking operations are well known. With such a vehicle braking system, it is possible to obtain the desired parking brake action without having to manually operate the parking brake when waiting at a traffic light, on a slope, or when stopping, etc., thereby reducing the burden on the driver. Another advantage is that a device with extremely excellent operability can be provided to physically disabled people.

However, in this type of braking system, the auxiliary parking brake by locking the soft brake is overused as a substitute for the handbrake or other main parking brake, and braking failure occurs under such severe usage conditions. There were other problems. In other words, the auxiliary Hikoken car brake using an electromagnetic locking mechanism is less reliable than a mechanical parking brake. There are cases where the brake cannot be locked, and in such a case, there is a problem in that the vehicle is left in an unbraked state. In conventional devices, when the ignition key switch is turned off, the auxiliary parking brake is released, and if the driver leaves the seat without noticing this, the vehicle will be in an unbraked state and the vehicle will not be able to drive on a slope. There was a problem that it could cause accidents.

The present invention has been made in view of the above-mentioned conventional problems.The purpose of the present invention is to continue the auxiliary parking brake even when the ignition key switch (D off) is activated, and to alert the driver of the condition of the ignition key switch (D-off) and immediately apply the main parking brake. An object of the present invention is to provide an improved vehicle braking device that can facilitate switching.

To achieve the above object, the present invention includes electromagnetic means for electromagnetically locking a brake pedal in a braking position, and a brake lock circuit that supplies a lock signal to the electromagnetic means under a predetermined holding condition, An alarm device that is in a state where an alarm is possible when an auxiliary parking brake is applied due to a vehicle braking device that performs an auxiliary parking brake action using a foot brake;
a release circuit that releases the brake lock circuit when the main parking brake is operated; the brake lock circuit is constantly supplied with power supply voltage directly from the battery without going through the ignition key switch, and the ignition key switch is turned off. The present invention is characterized in that the auxiliary parking brake is continued even when the auxiliary parking brake is turned off, and at the same time the auxiliary parking brake is turned off, a light warning function is performed.

Preferred embodiments of the present invention will be described below with reference to the drawings.

In order to lock the knot brake (not shown) in the braking state, a magnetic solenoid 10 is provided, and when the electromagnetic solenoid 10 is energized, the foot brake is held locked in its braking position, and the electromagnetic solenoid 10 The foot brake returns to the brake release position by de-energizing the brake. Of course, as is well known in the layer not shown, when the foot brake is further depressed to further increase the braking force from the locked position by the solenoid 10, the foot brake is temporarily unlocked, and in the new further depressed state. The 7-stop brake can be held locked.

'The excitation current to the electromagnetic solenoid 10 is supplied from the brake lock circuit 12, and to the brake lock circuit 12,
In the present invention, the power supply voltage is directly supplied from the battery 16 without going through the ignition key switch 14.

The brake lock circuit 12 includes a self-hold circuit 18 and a holding condition determining circuit 20, and the braking position is locked in a desired braking state, and this holding condition is determined by the determining circuit 2.
The holding signal determined by the holding condition judgment circuit 20 is held in the self-holding circuit 18 and sent to the electromagnetic solenoid 10. Excitation current is supplied to effect the desired brake pedal locking action.

The self-hold circuit 18 is released by the accelerator signal 100 from the accelerator switch 22, and when the accelerator is depressed once from the auxiliary parking braking state, the brake pedal is automatically unlocked and a smooth outside vehicle starting state can be obtained. can.

A further feature of the present invention is that when the ignition key switch 14 is turned off and the vehicle is being braked by the auxiliary parking brake, the driver is alerted to this, and when the driver leaves the vehicle, It is possible to prevent the vehicle from being subjected to auxiliary parking braking, which is relatively unreliable, and the alarm 24 is formed from a sound generator such as a buzzer, a horn, or a speak monitor. There is. An alarm signal is output from the AND gate 26 to this *@ device 24, and one input of the AND gate 26 receives the lock signal of the break lock circuit 12, and the other input receives the control signal from the OR gate 2B. Shingetsu is supplied. The power side terminal of the ignition key switch 14 is connected to one input of the OR gate 28, and as a result, when the ignition key switch 140 is turned off, its power side terminal becomes 1-L. The gate is in the off state, but when the ignition key switch 14 is turned off, its power supply terminal is j-
1-IJ, and a gate-on signal is supplied to the AND gate 26. Therefore, at this time, the brake lock circuit 12
In the auxiliary parking braking state where a lock signal is output from
An alarm signal is output from the AND gate 26 to the alarm device 24, and a desired alarm action is performed.

In the embodiment, the driver's side door opening signal 200 is supplied to the other input of the OR gate 28, and even if the ignition key switch 14 is turned on,
When the driver leaves the seat, the alarm 24 can be activated to perform a desired alarm action.

Further, in the present invention, a release circuit 30 for releasing the auxiliary parking brake and warning action is provided, and the release circuit 306 detects that the shift position is set to P range in an automatic vehicle. A range switch 32 is included, and a detection signal from the P range switch 32 is supplied via an inverter 34 to a reset input of a self-hold circuit 18 of the brake lock circuit 12. Therefore, the self-hold circuit 18 of the brake lock circuit 12 is reset by the warning or by the driver operating the main parking brake voluntarily, that is, by shifting the automatic vehicle to the P range. When the signal disappears, the electromagnetic means 10 is de-energized and the auxiliary parking brake is turned off.

Since the AND gate 26 is gated off, the alarm function of the alarm device 24 is also stopped.

The embodiment of the present invention has the above configuration, and its operation will be explained below.

When a predetermined holding condition is met, the brake lock circuit 12
A Karake lock signal is output, which causes the electromagnetic means 1 to
An energization of 0 holds the footbrake in its braking position and provides an auxiliary parking braking condition.

The lock signal is also supplied to one input of the AND gate 26, so that the alarm 24 is put into an alarm standby state whose operation is controlled by the other signal of the AND gate 26.

The auxiliary parking braking state described above is a temporary braking state, but at this time, the driver may overestimate this temporary braking state or forget to switch to the main parking braking state and press the ignition key to leave the seat. Although the switch 14 may be turned off,
In the present invention, the brake lock circuit 12 receives power supply voltage directly from the battery 16 without going through the ignition key switch 14, so that the auxiliary parking brake can be continued even during such an off operation. During this off-operation, an off-operation detection signal is supplied from the OR gate 28 to the AND gate 26, and an alarm signal is supplied to the alarm 24, so that an alarm is issued to the driver before he leaves his seat. Therefore, this warning prompts the driver to operate the main parking brake and enter the parking lot.
A shift operation to the range is performed, and as a result, the release circuit 3
A release signal is supplied from 0 to the self-hold circuit 18,
Both the supplementary parking brake and the warning are released at the same time.

As described above, according to the present invention, even when the ignition key switch is turned off, the auxiliary parking braking continues, and even when the vehicle is stopped on a slope or the like, the ignition key switch is turned off. When the ignition key switch is turned off, the electromagnetic means is energized for a long time while charging to the vehicle battery is stopped. In order to prevent unreliable low-level auxiliary parking braking from continuing when current is supplied and the driver is away,
An alarm can be immediately issued when the ignition key switch is turned on, thereby allowing the driver to immediately perform a switching operation to the main parking brake. '-1/ By switching to the main parking brake, the auxiliary 11-vehicle brake and warning are immediately canceled, making it possible to prevent wasteful energy consumption.

As described above, according to the present invention, it is possible to enhance the safety of a vehicle braking device having an auxiliary side vehicle braking action, and to prevent erroneous operation while significantly improving operability for the driver.

[Brief explanation of the drawing]

Fig. tj is a circuit diagram showing a preferred embodiment of a vehicle braking device according to the present invention. 10...Electromagnetic means, 12...Fil/- to [J-tuck circuit, 14...Ignition key switch, 16.Battery, 24...Alarm, ;30...Release circuit, 32...P range switch. Agent Patent Attorney Yoshi 1) Ken 2L-1---
−A −−J ゛〜30

Claims (1)

[Claims] (1) Includes an electromagnetic means for electromagnetically locking the brake pedal in the braking position, and a brake lock circuit that supplies a lock signal to the electromagnetic means under predetermined holding conditions, and the foot brake is used to provide auxiliary A braking device for a vehicle that performs a parking brake action, including an alarm device that is in a warning enabled state when an auxiliary parking brake is applied, and a release circuit that releases the brake lock circuit when the main parking brake is operated,
The brake lock circuit is constantly supplied with power supply voltage directly from the battery without going through the ignition key switch, continues to perform auxiliary parking braking even when the ignition key switch is turned off, and issues an alarm at the same time as the ignition key switch is turned off. A vehicle braking device characterized in that auxiliary parking braking and warning are canceled by operating the main brake.