ANTISKID CONTROL DEVICE FOR FOUR-WHEEL-DRIVE VEHICLE

摘要

PURPOSE:To enhance braking performance by controlling a pressure in each brake cylinder in accordance with a slip rate of each wheel while forcedly switching the wheel to a four-wheel-drive condition when the slip rate of the main drive wheel during antiskid control increases to a preset value or more. CONSTITUTION:A wheel speed detecting means A, detecting a speed of each wheel, and a car body speed detecting means B, detecting another position speed of a car body, are provided, and being based on detecting values of these means, an arithmetic means C calculates a slip rate of each wheel. And being based on the calculated slip rate, a cylinder pressure control means D individually controls a pressure in a braking cylinder of each wheel. While similarly an output signal of the arithmetic means C is input to a clutch control means, and it forcedly connects a clutch, interposed between front and rear wheel side driving systems, when a slip rate of the main drive wheel of the slip rate arithmetic values during antiskid control increases to a preset value or more, and a four-wheel-drive condition is established.