03-05-2012, 01:02 PM
Hydraulic-Electric (EMB) Hybrid Vehicle
ABSTRACT
The Electro-Mechanical Battery (EMB) has been proposed as an alternative for hydraulic storage on midsize hybrid passenger vehicles. A multi-domain physical system model of an EMB-based hybrid vehicle has been developed using Simulink, SimPowerSystems, and SimDriveline.
This model has been used to gather some initial simulation results of the EMB charge/discharge cycles and its behavior in a drive cycle. This solution could be applicable to hybrid designs, if it can be proven that the assumed high performance components can be produced, and that they have properties similar to the assumptions that have been made.
Compared to the operation of conventional braking systems, by depressing the brake pedal with the Electro-Hydraulic Braking System (EHB), the appropriate command is transmitted electronically to the electronic controller of the hydraulic unit. This determines the optimum braking pressure and actuates the brake calipers hydraulically.
The Hybrid Braking System is the solution approach for vehicles without a fully dimensioned on-board network for dry Electro-Mechanical Brakes (EMB) on all four wheels. There can be integrated electrical parking brake functionality at the rear wheels, eliminating the need for long hydraulic lines and handbraking cables leading toward the rear axle. Since EMB wheel brake modules with integrated electrical
parking brake function are already installed at the rear wheels, there is no longer any need for long hydraulic lines and hand-braking cables leading toward the rear axle. The front axle is operated hydraulically, as with conventional braking systems.