JPH1095319A - Vehicular brake - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the accident of automatic starting of a vehicle during its stop caused by leaving no manual brake or slackening of the brake by controlling locking/unlocking of the door of the vehicle based on a radio signal from a transmitter and determining no occupants in the vehicle when the locking of the door is detected. SOLUTION: The antenna 2 of a keyless entry ECU 3 receives a radio wave signal transmitted from an ignition key 1. The keyless entry ECU 3 equipped with a receiver combines a control signal for opening/closing the lock of a vehicular door with the radio wave signal received by the antenna 2 and outputs the signal and performs opening/closing of the door while making a solenoid 31 conductive or non-conductive. Normally, a door locking opening/closing control signal is outputted from the keyless entry ECU 3 to the solenoid 31 and a signal indicating the opening/closing of the door lock is transmitted to a parking brake ECU 12. A short sensor 9 detects the weight of a driver by a limit switch provided in the seat of a driver's seat and outputs the result of detecting the existence.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle braking device, and more particularly, to a device for maintaining a braking force of a braking means so that the vehicle does not move when the vehicle is unmanned.

[0002]

2. Description of the Related Art Conventionally, a device for operating a parking brake, which is one of automatic braking means, has been devised and put into practical use. This system consists of a sheet sensor, N, R
It was detected by a range input, door sensor, STP, IG switch, etc. that no person was on the vehicle. At this time, when the vehicle started to move based on the signal from the vehicle speed sensor, the solenoid valve was activated and stored in the tank. A method of stopping the movement of the vehicle by raising the parking brake by the vacuum pressure is used.

[0003]

However, these conventional methods detect this movement after the vehicle starts moving,
Large amounts of energy are required to stop the vehicle. In addition, operating the brakes when getting off the vehicle has a problem in unmanned determination and reliable automatic operation with the current limited sensors.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a method for preventing an unmanned vehicle from moving.
In a vehicle braking device that maintains a braking force in the vehicle braking unit, a lock control unit that controls locking or unlocking of a vehicle door based on a wireless signal from a transmitter, and the lock control unit. A determination means for determining that the inside of the vehicle is in an unmanned state when detecting that the door is locked is provided.

[0005] Further, the determination means cancels the determination of the unmanned state when the lock control means detects that the door of the vehicle is unlocked. Further, a braking force detecting means for detecting a braking force in the braking means, and a determination of the unmanned state by the determining means is detected, and an output from the braking force detecting means indicates that the braking force is insufficient. A braking force control means for generating a sufficient braking force for the braking means upon detection is provided.

The braking force control means may maintain the braking force of the braking means at all times when detecting an unlocking different from the unlocking of the door by the transmitter in the determination of the unmanned state. Features. A foot brake detecting means for detecting whether a foot brake device of the vehicle is stepped on; a seat detecting means for detecting whether a driver is seated on a driver seat of the vehicle; and a door of the vehicle. Door lock detecting means for detecting that the vehicle has changed from the locked state to the unlocked state, vehicle speed detecting means for detecting the vehicle speed of the vehicle, and detecting whether or not the gear position of the transmission is at a position for driving the vehicle. Gear range detecting means, wherein the determining means detects that the door is locked by the door lock detecting means, and further comprises the stepping brake detecting means, the seating detecting means, the door lock detecting means, and the vehicle speed detecting means. Means, based on the detection by the gear range detecting means, that the foot braking device is not stepped on,
When it is detected that the driver is not seated, that the door is unlocked from the locked state, that the vehicle is stopped, and that the gear position of the transmission is not a position for driving the vehicle, Is characterized by determining that the person is unmanned.

Further, the braking means is characterized by comprising a parking brake device for braking by a pulling force or a foot brake device for braking by a stepping force.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing one embodiment of the present invention.
Reference numeral 1 denotes an ignition key, a transmitter of a keyless entry device which transmits a radio signal for opening / closing a door of a vehicle by pressing a push button switch provided on a handle of the key and having a transmitter incorporated in the key. Key. An antenna 2 of the keyless entry ECU receives a radio signal transmitted from the ignition key 1. Reference numeral 3 denotes a keyless entry ECU equipped with a receiver, which combines a radio signal received by the antenna 2 with a control signal for opening / closing a vehicle door and outputs the combined signal.
Is energized or de-energized to open and close the door lock.
Normally, the keyless entry ECU 3 outputs a door lock opening / closing control signal to the solenoid 31. The keyless entry ECU 3 outputs this control signal and determines that the door lock has been opened / closed by the keyless entry. This signal is transmitted to the ECU 12.

Reference numeral 4 denotes an ignition (IG) state (OF).
F, ACC, ON, etc.) by an electrical signal and output a signal indicating this. This signal can be known from an energization state to the switch contact of the IG switch, a display lamp for displaying a connection state of the IG switch, or the like. Reference numeral 5 denotes a PKB switch that outputs an electric signal indicating the state of the parking brake (PKB) (whether the brake is engaged or the brake is released). This state can be known from the state of the limit switch provided on the brake. Reference numeral 6 denotes a signal which outputs a signal indicating whether a foot brake is being applied from ON / OFF of a stop lamp (STP).
With the TP switch, this signal is output from the stop lamp circuit. Reference numeral 7 denotes a door switch that outputs a signal indicating the open / closed state of the door. Reference numeral 8 denotes a gear range sensor that outputs a signal indicating a gear position of the transmission.
(Parking) ─ R (Reverse) ─ N (Neutral) ─ 1
It is output from a lamp circuit that indicates a gear position such as (first gear) ─2 (second gear) ─3 (third gear). Reference numeral 9 denotes a seat sensor which detects the weight of the driver by a limit switch provided on the seat of the vehicle driver, and detects and outputs presence / absence.

Reference numeral 10 denotes a sensor for detecting a tightening force (braking force) of a parking brake, which detects a vacuum pressure or the like for tightening a brake pad, converts the detected pressure into an electric signal, and outputs the electric signal. A vehicle speed sensor 11 outputs a pulse signal corresponding to the number of rotations of the wheels. A parking brake ECU (Electronics Control) 12 processes the output from each of the above-described sensors according to the situation and outputs a control signal according to the situation to each control device.
Unit). This parking brake ECU 1
RO and keyless entry ECU 3
M, a RAM, and a CPU, and the locking of the door and the braking force of the parking brake are controlled by program processing of the CPU.

Reference numeral 13 denotes a device for generating a braking force by pulling a parking brake, and is, for example, a vacuum gravitational device or a hydraulic or motor driven gravitational device. Reference numeral 14 denotes a handle for manually pulling the parking brake. Reference numeral 15 denotes a brake cylinder provided on the wheel. The brake cylinder 15 is tightened manually or by the pressure of the vacuum device 13, and the wheel is braked to fix the movement of the vehicle.

Next, the parking brake ECU 1 of the present invention will be described.
2 will be described with reference to the flowchart of FIG. The ECU 12 always operates even when the vehicle is stopped unless the dedicated power switch is turned off. Step S1
The keyless entry ECU 3 determines whether the door is locked by the operation of the keyless entry ECU 3.
The determination is made based on the reception of the signal output from. If the door is locked by the operation of the keyless entry ECU 3, the process proceeds to step S2. If the door is locked by an operation other than the signal output from the keyless entry ECU 3, the process proceeds to step S4. In step S2, it is determined whether the unmanned determination condition is satisfied. If the condition is satisfied, step S3 is performed.
If not, the process proceeds to step S6. In step S4, it is determined whether or not the door has been unlocked by the operation of the keyless entry ECU3. If the operation of the keyless entry ECU 3 determines that the door has been unlocked, the process proceeds to step S5. Keyless entry EC
If unlocked by any operation other than U3, it is determined that there is a risk of being stolen, and the process moves to step S6. The unmanned determination conditions include, for example, the above-described locking by the keyless entry ECU 3, the STP switch 6 being turned off, no weight being detected by the seat sensor, the door being closed → opened, the vehicle speed being 0, and the gear position of the transmission being “N” ( When conditions such as neutral) or “P” (parking) are satisfied, it is determined that there is no driver.

In step S3, the flag 1 is turned on. In step S5, the flag 1 is turned off.
The flag 1 (FLAG1) is an unmanned determination flag.
In step S6, it is determined whether the flag 1 has been turned on. If the flag 1 has been turned on, the process proceeds to step S7.
If the flag 1 has not been turned on, the process proceeds to step S8. In step S7, it is determined whether or not the pulling force of the brake is insufficient. If the pulling force is insufficient, the process proceeds to step S9, and if not, the process proceeds to step S8. In step S8, the brake lifting operation instruction is turned off (with the brake pulling force unchanged), and step S1 is performed.
Return to In step S9, since the pulling force is insufficient, the brake pulling force is increased to a predetermined force, and the process returns to step S1.

In this embodiment, locking by keyless entry and turning off of the STP switch 6, no weight by a seat sensor, door closing → opening, vehicle speed is 0, transmission gear position is “N” (neutral) or “neutral” P "
(Parking) and other conditions are combined to determine the unmanned state to improve the certainty of the determination. However, in order to reduce the processing load on the CPU, at least the locking operation of the keyless entry is performed. The unmanned determination may be made by detecting. This is because the locking operation of the keyless entry usually involves the driver going out of the vehicle and locking the vehicle, and it is surely recognized that the vehicle is unmanned. Note that the manual locking operation may be performed from within the vehicle, and it is more reliable to make a determination using keyless entry. In this embodiment, the braking means is limited to the parking brake. However, the present invention is not limited to this and may be applied to a foot brake by hydraulic pressure.

[0015] When the condition for judging that the door is locked and that the vehicle is unmanned (the driver is not seated in the driver's seat) is satisfied by the keyless entry or the like, the parking brake is raised, and the condition is not satisfied. In some cases, the brake lifting instruction is released while the brake is applied.
Therefore, even if the door is unlocked regardless of the keyless entry or the door is broken and the door is opened, the parking brake cannot be released with the parking brake always applied, as shown in the flowchart above. This also helps prevent vehicle theft.

[0016]

As described above in detail, in the present invention, the locking operation by the keyless entry device that ensures the absence of the driver is adopted, so that the stopped vehicle can be prevented from forgetting or loosening the manual brake. It is possible to prevent an accident of unmanned departure, and to surely determine that the vehicle is unmanned, thereby preventing unexpected braking. The parking brake can be released only when locking / unlocking with the keyless entry device, and in the case of unlocking other than the keyless entry device (manual unlocking or breaking the lock), the manual brake is applied (by releasing the manual brake). Is automatically suspended again)
Since the vehicle cannot be moved, it also helps prevent theft of the vehicle.

[Brief description of the drawings]

FIG. 1 is a configuration diagram in one embodiment of the present invention.

FIG. 2 is a flowchart showing processing performed by a CPU of an ECU 12;

[Explanation of symbols]

1 ... Ignition key 2 ... Antenna 3 ... Keyless entry ECU 4 ... Ignition switch 5 ... Barking Brake switch 6 Stop lamp switch 7 Door switch 8 Transmission gear range sensor 9 Seat sensor 10 ... Brake pull force sensors

Claims (6)

[Claims] 1. A vehicle braking apparatus for maintaining a braking force of a braking means of a vehicle so that an unmanned vehicle does not move, wherein a vehicle door is locked or closed based on a radio signal from a transmitter. A vehicle braking device comprising: a lock control unit that controls unlocking; and a determination unit that determines that the interior of the vehicle is unmanned when the lock control unit detects that the door is locked. 2. The apparatus according to claim 1, wherein the determination means cancels the determination of the unmanned state when the lock control means detects that the door of the vehicle is unlocked. Vehicle braking device. 3. A braking force detecting means for detecting a braking force in the braking means, and a detection of the unmanned state by the determining means, and an output from the braking force detecting means determines that the braking force is insufficient. 3. The vehicle braking device according to claim 1, further comprising a braking force control unit configured to generate a sufficient braking force with respect to the braking unit when detecting that there is a vehicle. 4. The braking force control means, when detecting an unlocking operation different from the unlocking operation of the door by the transmitter in the determination of the unmanned state, always keeps the braking force of the braking means. The vehicle braking device according to claim 3, wherein 5. A stepping brake detecting means for detecting whether a stepping brake device of a vehicle is stepped on, a seating detecting means for detecting whether a driver is sitting on a driving seat of the vehicle, Door lock detecting means for detecting that the door of the vehicle has changed from the locked state to the unlocked state; vehicle speed detecting means for detecting the vehicle speed of the vehicle; and whether or not the gear position of the transmission is at a position for driving the vehicle. And a gear range detecting unit that detects that the door is locked by the door lock detecting unit, and the stepping brake detecting unit, the seating detecting unit, the door lock detecting unit, Based on the detection by the vehicle speed detection means and the gear range detection means, the foot brake device is not stepped on, the driver is not seated, the door is changed from the locked state to the unlocked state, and the vehicle stops. I Are possible, and the gear position of the transmission is detected that it is not a position for driving the vehicle, the vehicle braking apparatus according to claim 1, wherein the in-vehicle are those determined to be unmanned. 6. The vehicle braking device according to claim 1, wherein said braking means comprises a parking braking device that performs braking by a pulling force or a foot braking device that performs braking by a stepping force.