SYSTEM FOR REGULATING THE SUPERCHARGING PRESSURE OF AN INTERNAL COMBUSTION ENGINE HAVING TWO STAGED TURBOCHARGERS

摘要

The regulating system comprises means (21) for generating a supercharging pressure setpoint, means (22) for converting this setpoint into a compression ratio setpoint for each of the turbochargers, the latter setpoint cooperating with a first regulator (23) for regulating the compression ratio of each of the turbochargers, this first regulator (23) cooperating with a second regulator (24) for regulating the expansion ratio of each of the turbochargers as a function of an expansion ratio setpoint value (25) for each of these turbochargers, and means for prepositioning the actuators which control the throttle valves for regulating the pressures at the outlet of each of the two turbochargers, the two regulators (23, 24) cooperating with an arbitration unit (27) designed to control an actuator for modifying the pressure at the outlet of one of the turbochargers or at the outlet of the other turbocharger.