Patent ID: 9126570
Filing Date: 2015-09-08
Classification: B60T

Abstract:
1. A braking system in a hybrid vehicle, comprising: a brake pedal for operating wheel brakes, the pedal having a range of pedal displacement including an initial deadband displacement range; a master cylinder configured to supply hydraulic fluid to the wheel brakes; a vacuum booster having an active boost control valve, the vacuum booster coupled to the brake pedal and the master cylinder and capable of providing an active boost control force to the master cylinder while the brake pedal is displaced within the initial deadband displacement range; a rod coupling the brake pedal to the vacuum booster for transmitting a force from the brake pedal to the master cylinder in response to displacement of the brake pedal past the initial deadband displacement range; a fluid circuit fluidly connecting the master cylinder to the wheel brakes; and at least one controller programmed to selectively inhibit fluid flow from at least a portion of the fluid circuit to the master cylinder based at least upon an operating state of the active boost control valve.