Patent ID: 8899694

Claim:
A brake system for a vehicle having a VIS (Variable Induction System) actuator of an intake manifold, a vacuum pipe connected to the VIS actuator, and a vacuum pump connected to the vacuum pipe and disposed upstream of a vacuum chamber to generate negative pressure, comprising: a vacuum hose having a first end connected to the vacuum pipe to generate additional negative pressure, wherein a second end of the vacuum hose is connected to a vacuum chamber pre-formed between an inner surface and an outer surface of the intake manifold, wherein the first end of the vacuum hose and the vacuum pipe are connected through a “T”-shaped nipple, wherein a check valve is disposed downstream of the vacuum chamber in a flow passage of the intake manifold and fluidly connected between the intake manifold and the vacuum chamber, and wherein the intake manifold, the check valve, the vacuum chamber and the vacuum pump are fluid-connected in sequence.