JPH04123757U - Vehicle automatic braking system - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a technology that performs automatic braking in a state that is highly safe for the driver or passenger in a vehicle equipped with an automatic braking device. [Structure] Vehicle speed is detected in an automatic braking device 5 for a vehicle equipped with a brake pressurizing device 4 that intervenes in a hydraulic path 3 extending from a master cylinder 1 to a wheel cylinder 2 to forcibly perform braking. A detection means 6, an inter-vehicle distance detection means 7 for measuring the distance between the host vehicle 12 and the vehicle ahead 11, a seatbelt wearing state detection means 8 for detecting whether or not a seatbelt is worn in the driver's seat, and the vehicle speed detection means. means 6, a control section 10 for calculating signals from the inter-vehicle distance detecting means 7 and the seat belt wearing state detecting means 8 and outputting a braking command signal to the brake pressurizing device 4; The part 10 includes a brake pressurizing device 4 that performs braking by changing the deceleration depending on whether or not a seat belt is worn.
control.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to an automatic braking system for vehicles, and particularly when detecting the distance between vehicles and performing automatic braking. Automatic braking with variable braking control depending on whether the passenger is wearing a seatbelt Regarding equipment.

0002

[Conventional technology]

This type of automatic braking device is disclosed in Japanese Patent Application Laid-Open No. 2-162500 or As described in Publication No. 2-310800, etc., the host vehicle 12 and the vehicle ahead 11 A technique for automatically driving by measuring the inter-vehicle distance or speed difference and forcibly braking the own vehicle 12. The technique is known.

0003 In the conventional technology described above, in addition to the following distance, road surface conditions and traveling speed are referred to. It is specified that braking parameters are determined and automatic braking and collision avoidance are performed. .

0004

[Problem that the idea aims to solve]

However, the above-mentioned conventional technology takes into account multiple factors such as road surface conditions and traveling speed. Although the braking parameters are determined based on the It does not take into account the condition of the driver or passengers, etc. It was.

[0005] As a result, sudden deceleration can cause the driver or passenger to hit the steering wheel or windshield. There is a possibility of a rear-end collision, and even if the vehicle itself is able to avoid the collision, the driver and passengers may be injured. expected to be incurred.

[0006] The present invention was made in view of the above-mentioned problems, and its purpose is to improve the automatic braking system. In vehicles equipped with the The goal is to provide the technology to perform these actions.

[0007]

[Means to solve the problem]

The present invention intervenes in the hydraulic pressure path 3 from the master cylinder 1 to the foil cylinder 2. In an automatic braking device 5 for a vehicle equipped with a brake pressurizing device 4 for forcibly braking , a vehicle speed detection means 6 that detects the speed of the vehicle, and a distance between the host vehicle 12 and the vehicle ahead 11. Inter-vehicle distance detection means 7 for measuring the distance between vehicles, and whether or not a seat belt is worn in the driver's seat. a seatbelt wearing state detection means 8 for detecting the vehicle speed; Arithmetic processing of signals from the distance detection means 7 and the seat belt wearing state detection means 8 and a control unit 10 that outputs a braking command signal to the brake pressurizing device 4, The control unit 10 performs braking by changing the deceleration depending on whether or not a seat belt is worn. The gist is to control the brake pressurizing device 4 to

[0008]

[Effect]

According to the present invention, the brake pressure device 4 is activated depending on whether or not the seat belt is fastened. It is controlled to change the deceleration. i.e. wearing a seatbelt In some cases, a certain degree of sudden deceleration can be tolerated, so the brake application by the brake pressurizing device 4 is It is possible to shorten the threshold distance to the vehicle 11 in front at the start, and the seatbelt When the bolt is installed, it is made longer so that the driver and passenger's car is protected during deceleration. It is possible to prevent rear-end collisions inside the vehicle.

[0009]

【Example】

FIG. 1 is a block diagram of an automatic braking device showing an embodiment of the present invention.

0010 In this embodiment, a speed sensor 6 as a vehicle speed detection means and an inter-vehicle distance detection means are used. the inter-vehicle distance sensor 7 as a means for detecting the seatbelt wearing state; each signal is input to the control unit 10, and the control unit 10, the brake pressurizing device 4 is controlled by performing predetermined arithmetic processing. Ru. Here, the brake pressurizing device 4 extends from the master cylinder 1 to the wheel cylinder 2. Intervening in the hydraulic pressure path 3 to forcibly control the supply of brake fluid to the wheel cylinder 2 It looks like this.

[0011] The speed sensor 6 detects the rotation of the wheels per unit time and converts it into speed. .

0012 The inter-vehicle distance sensor 7 is composed of, for example, an ultrasonic sensor, an infrared sensor, etc. As shown in FIG. It is equipped with a mechanism to measure distance.

[0013] The seat belt switch 8 outputs an "ON" signal when the seat belt is fastened. A mechanical or electronic switch mechanism. This seat belt switch 8 At least it detects whether the driver is wearing or not wearing a seatbelt in the driver's seat. However, seats other than the driver's seat are equipped with a mechanism to detect fellow passengers. The seat belt switch 8 may be made to function only when the vehicle is in use.

[0014] Detection signals from each sensor described above are sent to the control section 10. Control part 1 For example, 0 consists of a microcomputer with 8 to 36 bits of memory. Based on the information from each sensor, predetermined calculation processing is performed to apply brake pressure. A control signal for the device 4 is output.

[0015] Next, the processing flow in the control unit 10 of this embodiment will be explained based on FIG. 3. First, the traveling speed of the vehicle is input to the control unit 10 from the speed sensor 6. (301), the inter-vehicle distance x to the preceding vehicle 11 is input from the inter-vehicle distance sensor 7. (302). Furthermore, the control unit 10 refers to the information of the seat belt switch 8. Whether or not the signal from the seat belt switch 8 is in the "ON" state, i.e. The control process branches depending on whether the seat belt is fastened (303).

[0016] In the branch control flow, first, a different constant prepared in advance for the square of the speed ( K₁,K₂) by multiplying different thresholds (a₁,a₂) is calculated (3 04a, 304b). Next, deceleration constants (g ₁ ,g₂) and set them respectively (305a, 305b).

[0017] Then, if the distance x from the preceding vehicle 11 is smaller than the respective distance thresholds (a ₁ , a ₂ ) (306a, 306b), it is determined that the inter-vehicle distance is dangerous. Then, the deceleration g of the vehicle is referred to (307a, 307b). This deceleration g can be calculated from speed information from the speed sensor 6.

If the actual deceleration g of the vehicle is smaller than the deceleration constants (g ₁ , g ₂ ), the deceleration is insufficient, so a pressurization command is output to the brake pressurization device 4 (308). Based on this, the brake pressurizing device 4 supplies brake fluid to the wheel cylinder 2, for example, and performs forced braking. Further, if the deceleration g is larger than the deceleration constant (g ₁ , g ₂ ), the brake state is maintained as is (309). Then, when the vehicle finally stops, the brake is released (310, 311).

As described above, according to this embodiment, the distance thresholds (a ₁ , a ₂ ) and the deceleration constants (g ₁ , g ₂ ) from the vehicle 11 in front are determined depending on whether or not the seat belt is worn. have different values.

[0020]Thus, when the seat belt is fastened, by setting a small constant (K ₁ <K ₂ ), the distance threshold value from the vehicle 11 in front also becomes a small value (a ₁ < a ₂ ). Therefore, when the seat belt is fastened, brake pressure is started after the distance from the vehicle 11 in front is relatively shortened.

[0021]Furthermore, the deceleration of the vehicle is also set to a large value (g ₁ > g ₂ ) when a seat belt is worn, allowing relatively rapid deceleration.

[0022]

[Effect of the idea] According to the present invention, the brake pressure device 4 is controlled depending on whether or not a seat belt is worn. By changing the control, it is possible to realize automatic braking that is safe for the driver and passengers. Wear.

[Brief explanation of drawings]

[Fig. 1] A block diagram showing the configuration of an automatic braking device that is an embodiment of the present invention.

[Figure 2] Inter-vehicle distance sensor (inter-vehicle distance detection means) of the embodiment
Explanatory diagram showing the functions of

[Fig. 3] Flow diagram showing the processing procedure in the control unit of the embodiment

[Explanation of symbols]

1...Master cylinder 2...Wheel cylinder 3...Hydraulic pressure path 4...Brake pressurizing device 5...Automatic braking device 6...Vehicle speed detection means (speed sensor) 7...Following distance detection means (vehicle distance (sensor) 8. Seatbelt wearing state detection means (seatbelt switch) 10. Control unit 11. Front vehicle 12. Own vehicle

Claims (1)

[Scope of utility model registration request] [Claim 1] Vehicle speed detection means (6) for detecting the speed of the vehicle, a vehicle (11) traveling in front, and the own vehicle (12).
inter-vehicle distance detection means (7) for measuring the distance between the vehicle and the vehicle; seat belt wearing state detection means (8) for detecting whether a seat belt is worn in the driver's seat; vehicle speed detection means (6); comprising a detection means (7) and a control section (10) that calculates and processes signals from the seat belt wearing state detection means (8) and outputs a braking command signal to the brake pressurizing device (4); An automatic braking system for a vehicle, wherein the control unit (10) controls a brake pressurizing device (4) to perform braking by changing deceleration depending on whether or not a seat belt is worn.