Patent Number: 7,784,883

Title: Vehicular brake hydraulic pressure controller

Abstract: A vehicular brake hydraulic pressure controller has a reference hydraulic pressure acquisition section 21a for acquiring hydraulic pressure achieved on the other side of an electromagnetic valve as reference hydraulic pressure, a differential pressure calculation section 21b for calculating a differential pressure Py by subtracting previously-estimated hydraulic pressure achieved on one side of the electromagnetic valve from the reference hydraulic pressure; a pressure gradient coefficient calculation section 21c for acquiring a pressure gradient coefficient K correlating with a drive current of the electromagnetic valve and the differential pressure Py, and an estimated hydraulic pressure calculation section 21e for estimating current hydraulic pressure by adding a product, which has been produced by multiplying the differential pressure Py by the pressure gradient coefficient K, to the previously-estimated hydraulic pressure achieved on one side of the electromagnetic valve.

Inventors: Nomura; Nobuyuki (Tomi, JP), Uda; Megumu (Tomi, JP)

Assignee: Nissin Kogyo Co., Ltd.

International Classification: B60T 8/60 (20060101)

Expiration Date: 8/31/12018