Electrically Powered Steering Belt/Rack Drive
The most efficient EPS system offered by TRW, Belt Drive EPS (also referred to as Rack Drive) is a solution that integrates a brushless motor, toothed belt, and ball nut assembly with pulley and bearing in one unit. This setup results in lower inertia and friction for high power applications, as well as a more direct steering feel and superior response. The electronic control unit (ECU) is integrated into the electric motor assembly. As technologies move forward, the Belt Drive EPS solution is available in a smaller and more flexible package, helping to satisfy customers' packaging requirements. Belt drive technology is particularly suited to cars within the European D segment and above, and the TRW Belt Drive systems operate directly from 12V power on rack loads up to 13.5kN.
EPS is extremely efficient when compared to a power rack and pinion pump, using only 10 percent of the energy and only when the driver demands it. With no energy drag on the engine, fuel consumption is increased up to 4 percent, with a corresponding significant reduction in carbon dioxide emissions.
