Braking force control apparatus
AssigneeToyota Jidosha Kabushiki Kaisha
InventorSatoshi Shimizu
Life of this patent
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Abstract
A normal control in which a master cylinder 32 is used as a hydraulic source to increase a wheel cylinder pressure and a brake assist control in which a pump 12 and an accumulator 20 are used as the hydraulic source the wheel cylinder pressure is increased in a state where communication between the master cylinder 32 and the wheel cylinder 44** is intercepted are executed. When a termination request for the brake assist control occurs, first, the wheel cylinder pressure decreased. After the wheel cylinder pressure is decreased enough, communication between the wheel cylinder 44** and the master cylinder 32 is restored.
Claims5
A braking force control apparatus which executes a normal control and a brake assist control, said normal control using a master cylinder as a hydraulic source to increase a wheel cylinder pressure, and said brake assist control using a high pressure source as the hydraulic source to increase the wheel cylinder pressure to a pressure greater than the wheel cylinder pressure of said normal control and intercepting communication between said master cylinder and said wheel cylinder when an emergency braking operation is detected, comprising:
- a termination means for restoring communication between said master cylinder and said wheel cylinder when a termination request occurs during the execution of said brake assist control, wherein, before restoring communication, said wheel cylinder pressure is decreased from said pressure greater than the wheel cylinder pressure of said normal control.
Dependencies are inferred from the claim text.