Brake controller

Abstract

To provide a brake control device capable of excellently avoiding the control delay when the increase gradient of the required braking amount is large, and the control disturbance when the increase gradient of the required braking amount is small. The temporary target hydraulic pressure Prefa is determined (S3) based on the required deceleration Greft (S1). The corrected target hydraulic pressure Prefb is determined (S4) by limiting the gradient of the temporary target hydraulic pressure Prefa to be the first limit gradient L1. If the temporary target hydraulic pressure difference Delta Pref of the corrected target hydraulic pressure Prefb subtracted from the temporary target hydraulic pressure Prefa is not a more than a set value (S5, S6), the corrected target hydraulic pressure Prefb is determined to be the target hydraulic pressure Prefc (S7). Otherwise, the limit gradient is changed to be the second limit gradient L2 and the target hydraulic pressure Prefc is operated (S8).

Description

Technical field [0001] The present invention relates to a device for controlling the brakes of a braked vehicle, and more specifically, to an improvement in the control performance of the brake control device. Background technique [0002] Most of the braking systems of braking vehicles are equipped with a brake control device that, when increasing the amount of braking, determines the target braking amount of the wheels based on the amount of braking that should be applied to the wheels, that is, the requested braking amount , And control to make the actual braking amount, that is, the actual braking amount close to the target braking amount. An example of this is described in Patent Document 1 below. The brake system includes: a brake pedal as a brake operating component, a stroke sensor that detects the operating stroke of the brake pedal, a master pressure sensor that detects the hydraulic pressure of the master cylinder corresponding to the operating force of the brake pedal...

AI Technical Summary

Problems solved by technology

[0004] In the braking system described in Patent Document 1, the brake control device obtains the requested braking amount requested by the driver based on the operating state of the brake operating member, and determines the target braking amount based on the obtained requested braking amount. However, if the target braking amount is determined in this way, even if it changes sensitively in response to the increase of the requested braking amount, the control of the braking amount will become chaotic, and there is even a risk of divergence

If the target braking amount is determined in such a way that the above situation can be reliably avoided, when the increase gradient of the requested workload is large, the control delay will become large, so that sufficient control accuracy cannot be obtained

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