JPH0554131U - Anti-skid controller - Google Patents

Abstract

(57) [Summary] [Purpose] By recording information during anti-skid brake control, the purpose is to accurately judge the situation at the time of an accident and whether or not it was in a normal control state. To do. [Structure] The microcomputer 4 has a brake signal,
The wheel speed signal and the solenoid output supplied to the brake hydraulic pressure control actuator 3 for each wheel are taken in,
Information during anti-skid control (vehicle speed at brake on, braking distance from the brake-on point to the stop point, the solenoid output after the start of anti-skid control) is calculated and recorded in, for example, the EEPROM 5.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to an anti-skid control device, and more particularly to an anti-skid control device in which information on the latest anti-skid brake control is stored in a recording device (for example, a memory).

[0002]

[Prior Art]

 Generally, when anti-skid brake control is performed, the braking distance will be shorter than with normal braking, even if braking is performed under the same conditions. In addition, since the wheels do not lock, no slip marks remain. Therefore, there is a problem that it is difficult to judge the situation at the start of braking.

[0003]

[Problems to be solved by the device]

 The present invention has been made based on such a technical background. For example, by recording the information at the time of the anti-skid brake control in a recording device such as a memory, the situation at the time of an accident and the normal control state can be obtained. Accurately determine the situation (for example, whether the anti-skid brake worked correctly, or whether the anti-skid brake worked normally but the vehicle speed was too high originally). It was made possible.

[0004]

[Means for Solving the Problems]

 In order to solve such a problem, according to the present invention, there is provided an anti-skid control device comprising means for recording information about the anti-skid brake control from the start of the anti-skid brake control. It The information on the anti-skid brake control includes the vehicle speed at the start of the brake operation, the braking distance from the start point of the brake operation to the stop point, and the fluctuation of the solenoid output for brake hydraulic pressure control after the start of the anti-skid control. It refers to the situation (that is, the passage of time of the solenoid output after the start of anti-skid control).

[0005]

[Action]

 According to the above configuration, the situation at that time can be accurately determined based on the recorded information (data) even in the case of an accident during anti-skidding brake control.

[0006]

【Example】

 FIG. 1 shows the configuration of an anti-skid control device as one embodiment of the present invention, in which 1 is a microcomputer for anti-skid brake control, and the microcomputer 1 has a brake signal (a signal from a brake switch). ) And the wheel speed signal of each vehicle wheel, etc. are input, and when it is detected that the brakes are being applied and that the wheel speed has dropped significantly and the wheel deceleration has exceeded the specified value. , An anti-skid brake control signal (ABS control signal) is sent from the microcomputer 1 to the corresponding solenoid drive circuit 2 of the wheel, which causes the actuator for brake hydraulic pressure control of the wheel via the drive circuit 2 ( The energization of the brake hydraulic pressure control solenoid valve 3 is controlled (that is, the drive voltage is controlled). The actuator 3 is controlled by a solenoid output from blanking circuit 2). Normally, the drive circuit and the actuator are separately provided for each wheel, and the hydraulic pressure for each wheel is controlled by the micro computer 1, respectively. One of which is shown as the drive circuit 2 and the actuator 3.

Reference numeral 4 calculates each of the above information when the anti-skid brake control is performed, and the calculation result is stored in a predetermined recording device (for example, a RAM provided on the same chip as the microcomputer 4, or 1. A microcomputer provided for recording in an EEPROM 5 or the like externally attached to the microcomputer 4 as shown in FIG. 1, wherein the microcomputer 4 is provided with the above-mentioned brake signal (the brake is applied thereby). The wheel speed signal of each wheel and the solenoid output output from the drive circuit to the corresponding actuator (that is, the solenoid output from the drive circuit corresponding to the actuator corresponding to each wheel). Output) is captured.

FIG. 2 is a flowchart showing the operation procedure of the microcomputer 4 in the apparatus shown in FIG. 1. First, at step 1, it is determined whether the brake signal is turned on or not. If it is determined and the result is YES, the wheel speed at the time when the brake signal is turned on in step 3 (the wheel speed has not yet dropped at this point, so the brake speed at the time when the brake is turned on from the wheel speed is The vehicle speed can be estimated) and the measurement of the braking distance of the vehicle is started from the time when the brake is turned on (the vehicle speed is almost constant from the time when the brake is turned on to the time when the vehicle is stopped). The braking distance can be measured uniformly, and the braking distance can be measured from the vehicle speed and the elapsed time until the vehicle stops).

Next, at step 4, whether or not the anti-skid control is started (when the anti-skid control is turned on, the speed of one of the wheels is greatly reduced and the deceleration is reduced to a predetermined value. Since it is started when the above is reached, it is possible to determine from this that whether or not the control has been started), and if it is No, it is determined whether or not the vehicle body has stopped by going to Step 5. If the vehicle body is stopped without the anti-skid control being performed, the operation proceeds to step 6 to clear all the above information (data) and return to step 2. However, while the vehicle body is not stopped (the determination in step 5 is (While knowing), return to step 4 above.

On the other hand, when the determination in step 4 is YES (when the anti-skid control is started), the process proceeds to step 7 and the solenoid output (the solenoid output supplied to the hydraulic control actuator for each wheel is output). ) Is started to be recorded (that is, the change situation after that), and if it is determined in step 8 that the vehicle body is stopped, the process proceeds to step 10 and the wheel at the time of braking start measured in step 3 above. The vehicle speed (that is, the vehicle body speed) is recorded, and the braking distance of the vehicle calculated up to that time is also recorded, and the recording of the solenoid output started in step 7 is ended. While the determination in step 8 above is “NO” (the vehicle body is not yet stopped), the process proceeds to step 9 to determine whether or not the vehicle is in an acceleration state (that is, the brake signal is off). If there is, the process returns to step 8 above, but if the result is yes (that is, the brake is off), the process returns to step 2 above. As described above, a RAM built in the microcomputer 4 or an EEPROM externally attached to the microcomputer 4 is used as a recording means for each data.

[0011]

[Effect of the device]

 According to the present invention, based on the above-mentioned information recorded during anti-skid brake control, the situation at that time can be accurately determined even in the event of an accident or the like during the anti-skid brake control. You can

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an anti-skid control device as one embodiment of the present invention.

FIG. 2 is a flowchart illustrating an operation procedure of a microcomputer 4 in the apparatus of FIG.

[Explanation of symbols]

1 ... Microcomputer for anti-skid control 2 ... Drive circuit for each wheel 3 ... Actuator for brake hydraulic pressure control for each wheel 4 ... Microcomputer for recording information during anti-skid control

Claims (2)

[Scope of utility model registration request] 1. An anti-skid control device comprising means for recording information on the anti-skid brake control from the start of the anti-skid brake control. 2. The vehicle speed at the start of the brake operation, the braking distance from the brake operation start point to the stop point, and the fluctuation status of the solenoid output for brake hydraulic pressure control after the start of the anti-skid control are recorded. The anti-skid control device according to claim 1.