Electronic stability control-based brake actuation with redundancy

A brake system for a motor vehicle, comprising:

• an electronic stability control (ESC) module defining a first interconnect passage, and a pressure supply unit (PSU) module defining a second interconnect passage in fluid communication with the first interconnect passage of the ESC module;
• the ESC module including a first pump configured to transfer brake fluid from the PSU module and to a plurality of wheel brakes, and a prime valve configured to selectively control fluid communication between the first interconnect passage and an inlet of the first pump;
• the PSU module including a second pump configured to transfer the brake fluid from a fluid reservoir to the first interconnect passage of the ESC module, and a bypass fluid passage with an inline check valve;
• wherein the bypass fluid passage is configured to convey the brake fluid directly from the fluid reservoir to the ESC module and bypassing the second pump;
• and
• wherein the inline check valve is configured to allow fluid flow through the bypass fluid passage from the fluid reservoir and to the ESC module while blocking fluid flow in an opposite direction,
• wherein each of the ESC module and the PSU module includes two separate and independent brake circuits, with each of the first pump and the second pump including a primary pump element and a secondary pump element for pumping brake fluid through a corresponding one of the brake circuits,
• wherein the second interconnect passage comprises a second primary interconnect passage and a second secondary interconnect passage and the bypass fluid passage comprises a primary bypass fluid passage configured to bypass a primary pump element of the second pump and a secondary bypass fluid passage configured to bypass a secondary pump element of the second pump, wherein the PSU module further includes a primary pressure control valve controlling fluid flow between the second primary interconnect passage and the primary bypass fluid passage for regulating a fluid pressure;
• and a secondary pressure control valve controlling fluid flow between the second secondary interconnect passage and the secondary bypass fluid passage for regulating a fluid pressure.