PONTIAC, Mich. (June 26)—Delphi Corp. is developing a hybrid braking system as a competing technology to electro-hydraulic braking systems. The hybrid system uses a "smart" rear electric caliper with integral brake control function to control the braking force at the rear wheels. The conventional hydraulic front brakes, apply system and anti-lock braking system front modulator are combined with the rear electric brake calipers. When the driver brakes, intent is measured by a set of sensors, converted to a rear caliper apply command and communicated to the electric calipers. The hybrid system is the next logical step toward a pure brake-by-wire system, Delphi contends. "Hybrid is a lower cost alternative to EHB and introduces the auto maker and consumer to a by-wire system through the two rear electric calipers," said Mark DePoyster, chief engineer of the Delphi Dynamics Center.