English to French Tech/Engineering Automotive / Cars & Trucks M�canismes int�gr�s de direction (automobile)

MMM

Using a unique combination of hydraulics, electronics and magnetics, MMM magnetic assist steering has been engineered to provide the continuous speed-sensitive, variable-effort power steering necessary for today’s high-performance vehicles.
Instead of using fluid restriction or hydraulic back pressure, the MMM system’s variable-effort steering is achieved through noncontact mechanization. This provides smooth power steering from one effort level to another.
Although sophisticated, MAGNASTEER has few moving parts, making it exception-ally reliable. The system begins with a conventional rotary valve rack and pinion steering gear. A spool valve is integrated with the pinion to sense the level of torque applied to the input shaft through a torsion bar. At the heart of this system is an electromagnetic device that acts in parallel with the input shaft from the steering wheel, changing the steering effort required to open or close the rotary valve. In turn, the valve applies hydraulic pressure when assistance is needed. The net result is *a wide range of steering authority* with smooth transition from one effort level to another.