Brake Blending Design Using Distributed and Shared X-in-the-loop Test Environment

Brake blending design is a complex task in the development of electric vehicles (EV) and requires coordinated control on electric powertrain and friction brake system. The presented study discusses the architecture, control strategy, and functional validation of the brake blending as applied to an all-wheel drive EV equipped with four in-wheel motors (IWMs) and the decoupled electro-hydraulic brake system. The main focus is on the use of distributed and shared X-in-the-loop (XIL) test environment as a relevant development methodology enabling a wide spectrum of validation procedures. The paper introduces XIL-based experiments, where the brake blending operation has been evaluated for several test scenarios as the service braking and the Worldwide harmonized Light Duty Test Cycle (WLTC).