Patent ID: 8397507
Filing Date: 2013-03-19
Classification: B60T

Abstract:
1. A brake booster system for a motor vehicle of a type having an internal combustion engine with a throttle-less intake manifold not having a throttle valve for controlling output of the engine, an air induction system, and a vacuum actuated brake booster, comprising: a vacuum pressure transducer for measuring the pressure in the brake booster and producing a vacuum pressure signal, a hose means for connecting the brake booster with the intake manifold, a valve means moveable between a first position for at least partially blocking airflow through the air induction system thereby developing vacuum pressure in the intake manifold, and a second position in which the valve means does not obstruct the airflow path through the air induction system, the valve means further closing a flow path between the intake manifold and the brake booster when the valve means is in the second position thereby maintaining vacuum pressure in the brake booster, an actuator for controlling the position of the valve means in response to the pressure signals to enable desired vacuum pressure to be maintained in the brake booster, and a controller for receiving the vacuum pressure signal and providing a control signal for the actuator.