TH27849B - Automotive bread controller - Google Patents

Abstract

The purpose of this invention was to control the braking force of the front and rear wheel brake units by using a single modulator. and to develop Provides better convergence of control in anti-lock braking control operations. nature of invention First of all, it was determined that the slipping ratio line of the rear wheels decreases as the slip ratio decreases. of the rear wheel decreases as the front wheel's skid ratio increases as is shown on the orthogonal coordinate axes with vertical and horizontal axis indicating the ratio of The skid of the rear wheel and the front wheel sequentially, the brake reduction control area is fixed on the upper part of the target traction ratio line, the neutral zone is set low. than the said target line with the specified width and the control area for increasing the brake force It is defined at the bottom of the Negative Zone. The braking control scheme is judged on the basis of the fact that in the control region mentioned above, the current slip ratio point appears on the coordinate axis. This is determined by the slip ratio of the front wheels and that of the rear wheels as a result. being considered The control quantity of the modulator is determined. and in braking control, where the current skid ratio point falls into the zone The modulator's throttling is set to "0".

Claims (4)

1. Brake controllers for vehicles consisting of Front wheel brake (BF) mounted on front wheel (WF) Rear wheel brake unit (BF) mounted on rear wheel (WR) Single modulator (M) that can control the braking force of the front and rear wheel brake units. (BF, BR) as such. The front wheel speed senser (45F), rear wheel speed senser (45R) and the control unit (C) for controlling the operation of the aforementioned modulator (M) by the control unit (C) as follows. Contains Trajectory for traction ratio calculation (61F, 61R) for controlling front wheel traction ratio calculation. And of the rear wheels based on the measurements obtained from the front and rear wheel speed sensors (45F, 45R), respectively. A method for determining the target slip ratio (66) for determining the target skid ratio. That has one function Where the ratio of the front wheel slipping on the orthogonal axis with the vertical axis and the pointing horizontal axis indicates the rear and front wheel slip ratio respectively. Decision method (64) for determining the brake reduction control period on the upper part of the target skid ratio line, the zero zero response line below the target skid ratio line is similar. Required width and braking force control area On the lower part of the deficiency zone. And for the judgment of the braking control, based on the fact that in the above-mentioned control area there is a point of the current skid ratio present on the said orthogonal axis. Which is determined by the front and rear sliding ratio Derived from such slip ratio (61F, 61R) calculation method. Method for determining the control quantity (52) for determining the control quantity of the modulator (M) from the result obtained. It is determined by the aforementioned judgment (64) method and for determining the control volume of the modulator (M) at ("O" in the braking control type. Which regulates the slipping ratio at that time, falls into the aforementioned zero-tolerance zone and the modulator's drive path (53) for signal output to debug the modulator. (M) is based on the amount of control obtained. From the aforementioned method of determining the amount of control (52) 2. Automotive brake controllers pursuant to claim 1, where the aforementioned pathway (64) increases the width of the said zero-point. Gradually, when non-anti-lock braking control is applied, in which the point of the current skid ratio is outside the braking control area. 3. The automotive brake controller, as in claim 1, where, when the current transfer of the skid ratio point from the said brake reduction control area to the side below the ratio line, Slipping such a goal The control quantification path (52) determines the control quantity (52). Such modulators (M) are quantified on the braking force side over time. one That is determined on the basis of the value obtained by subtracting the width of the negative zone. Out of the distance between lines, target skid ratio As mentioned with the current slipping ratio point. And after the period has passed The control quantization path (52) determines the control amount of the modulator (M) on the braking force side at the set value. 4. Brake controller for motor vehicles as in claim 1, where the modulator (M) includes the motor unit (15) that can be braked. And the drive path of such modulator (53) which applied the braking force applied to the motor (15) variable resistor when the control quantity of such modulator (M) is "O "