Vehicular brake system with vehicle stability management

A vehicular brake system comprising:

• a master cylinder for pressurizing brake fluid;
• a plurality of wheel brakes in fluid communication with the master cylinder via fluid conduit;
• a pump for pressurizing fluid in the fluid conduit;
• a medium pressure accumulator for storing pressurized fluid, wherein the medium pressure accumulator includes a housing having a bore, an end cap disposed in the housing to sealingly enclose the bore, a switch mounted in the end cap and extending into the bore, and a piston slidably disposed within the bore having an extension for contacting the switch when the accumulator is filled with fluid;
• a priming valve located between a pump inlet and the medium pressure accumulator for regulating the flow or pressurized fluid from the medium pressure accumulator to the pump inlet;
• and
• a charging valve located between a pump outlet and the medium pressure accumulator for allowing pressurized fluid to flow into the medium pressure accumulator, wherein the charging valve is a solenoid actuated valve.

A vehicular brake system comprising:

• a master cylinder for pressurizing brake fluid;
• a plurality of wheel brakes in fluid communication with the master cylinder via fluid conduit;
• a pump for pressurizing fluid in the fluid conduit;
• a medium pressure accumulator for storing pressure fluid;
• a priming valve located between a pump inlet and the medium pressure accumulator for regulating the flow of pressurized fluid from the medium pressure accumulator to the pump inlet;
• a charging valve located between a pump outlet and the medium pressure accumulator for allowing pressurized fluid to flow into the medium pressure accumulator;
• wherein the charging valve is a solenoid actuated valve;
• and
• a bypass valve connected between the pump outlet and the priming valve for preventing excessive pressure buildup in the fluid conduit, wherein the bypass valve includes a housing having a bore, a piston slidably disposed within the bore having a valve check member, a seal for sealing against the piston to allow the piston to be referenced to atmospheric pressure, an end piece disposed within the bore having a valve seat, and a spring for biasing the piston towards the end piece and the valve check member against the valve seat to close the bypass valve, wherein the piston is moved away from the end piece thereby moving the valve check member away from the valve seat to open the valve by pressurized fluid having a predetermined pressure with reference to atmospheric pressure.