A device of an engine having a plurality of cylinders includes: exhaust passages each connected with either a single cylinder or two or more cylinders having non-adjacent exhaust order; a manifold section connected with each downstream end of the exhaust passages; a catalyst device downstream of the manifold section; and a valve driver. Each link includes a bearingless wheel assembly that has a simple structure and a wheel made of a special wheel material that is suitable for use as a conveyor wheel material in a corrosive environment. The method also includes mapping the surface to a plurality of graphics virtual memory addresses within an IO device page table. Such modulating agents may, but need not, be linked to a targeting agent, pharmaceutically active substance andor support material. The processor generates the electrical signals for the commutation based on these variables according to the field-oriented closed-loop control.