Brake system for idle stop vehicle
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Abstract
The brake system of an idle stop vehicle being provided with an integrated starter generator includes a starter motor, an electric power supply device for supplying an electric power to the starter motor, an air pump that is driven by the starter motor; a brake master cylinder booster that is connected to the air pump, a hydraulic unit for maintaining or releasing a hydraulic pressure of each wheel; and a controller. The air pump is driven by the starter motor to form a negative pressure in the master cylinder booster such that a hydraulic pressure of the hydraulic unit is maintained if an idle stop is released while the vehicle is located on an up-slope whose slope has a value that is higher than a first predetermined slope angle value or a down-slope whose slope has a value that is lower than a second predetermined slope value.
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