• Control of Vehicular & Industry Emission

Demand for greater onboard electrical capacity is driving plans for higher voltage automotive systems. 48-volt hybrid technology combines a dual-voltage setup with the advantages of start-stop technology.

It effectively captures a vehicle’s braking energy, provides more power for a growing list of electrical devices, and simultaneously boosts fuel efficiency – possibly by as much as 15%. The 48-volt configuration, supported by a number of automotive suppliers, calls for a conventional 12- volt network using a lead-acid battery like those employed in most conventional vehicles. The 48-volt system supports active chassis systems and regenerative braking and allows for further electrification of components such as turbochargers, fluid pumps, air conditioning compressors, cooling fans, and power steering.

Advanced start-stop systems have been developed that use an induction motor in a 48-volt belt-driven starter-generator (BSG). When the engine is running, the motor, acting as a generator, will charge a separate battery. When the engine needs to be started, the motor then applies its torque via the accessory belt and cranks the engine instead of using the starter motor. The separate battery is also recharged via a regenerative braking system. In addition to the start-stop function, a BSG system can enhance fuel economy even during highway driving by cutting off the fuel supply when cruising or decelerating.