Braking system with remote boost valve

A brake system comprising:

• a master cylinder for generating pressurized fluid;
• a wheel brake in fluid communication with said master cylinder;
• a reservoir in fluid communication with said master cylinder;
• a pedal travel simulator having:
• a housing having a first bore formed therein;
• a piston slidably disposed in said first bore, said piston and said housing generally defining a fluid chamber being in fluid communication with said master cylinder;
• and
• a spring biasing said piston in a direction to contract said fluid chamber;
• a source of pressurized fluid;
• a reaction spool having first and second ends and a second bore formed therethrough, said first end engaging said second end of said spring of said pedal travel simulator, said second bore of said reaction spool being in fluid communication with said reservoir;
• and
• a boost valve having:
• a valve body having first and second valve chambers, said first valve chamber in fluid communication with said wheel brakes, said second valve chamber in fluid communication with said source of pressurized fluid;
• a sleeve member fixed relative to said valve body, said sleeve member having a first end having a third bore formed therein, said third bore being in fluid communication with said source of pressurized fluid;
• a poppet valve assembly movable relative to said sleeve member between a first position and a second position, said poppet valve having first and second ends;
• a first valve member defined by the cooperation of said second end of said reaction spool and said first end of said poppet valve assembly;
• and
• a second valve member defined by the cooperation of said first end of said sleeve member and said second end of said poppet valve assembly;
• wherein when said poppet valve assembly is in said first position, said first valve member allows the flow of fluid between said second bore of said reaction spool and said first valve chamber, and wherein said second valve member restricts the flow of fluid between said second valve chamber and said source of pressurized fluid;
• and
• wherein when said poppet valve assembly is in said second position, said first valve member restricts the flow of fluid between said bore of said reaction spool and said first valve chamber, and wherein said second valve member allows the flow of fluid between said second valve chamber and said source of pressurized fluid.

A boost valve in fluid communication with a source of pressurized fluid and engaged with a reaction spool having a bore formed therethrough, the reaction spool being engaged with a spring of a pedal travel simulator, said boost valve comprising:

• a valve body having first and second valve chambers;
• a sleeve member fixed relative to said valve body, said sleeve member having a first end having a bore formed therein;
• a poppet valve assembly movable relative to said sleeve member between a first position and a second position, said poppet valve having first and second ends;
• a first valve member defined by the cooperation of the reaction spool and said first end of said poppet valve assembly;
• and
• a second valve member defined by the cooperation of said first end of said sleeve member and said second end of said poppet valve assembly;
• wherein when said poppet valve assembly is in said first position, said first valve member allows the flow of fluid between the bore of the reaction spool and said first valve chamber, and wherein said second valve member restricts the flow of fluid between said second valve chamber and the source of pressurized fluid;
• and
• wherein when said poppet valve assembly is in said second position, said first valve member restricts the flow of fluid between the bore of the reaction spool and said first valve chamber, and wherein said second valve member allows the flow of fluid between said second valve chamber and the source of pressurized fluid.