In October 2016 Daimler Buses presented the new electrohydraulic power steering (EHPS). Thanks to this system fuel consumption and CO₂ emissions can be reduced.
The Electrohydraulic power steering (EHPS) consists of a three-phase current synchronous motor, a control unit, a high-performance electrical system and a hydraulic pump.
On the one hand short pipes reduce the system-based friction loss significantly within the hydraulic circuit. On the other hand the intelligent control system converts vehicle data to a demand-based actuation of the electrically operated pump – consequently, it provides the right amount of steering assistance depending on the driving situation. This leads to a reduction of fuel consumption.
The intelligent system was developed in collaboration with the Austrian Engineering Center Steyr and has already been awarded the "Innovation Label" by the specialist panel of the European Coach Week (ECW) at the international Busworld 2015.
The plan is to offer the system for Mercedes-Benz Citaro city buses as optional equipment from mid 2017.