01887nas a2200193   4500008004100000245006800041210006700109300001600176490000700192520127000199653001501469653002101484100001601505700001501521700001301536700003101549700001301580856010001593       2007                        eng d00aHybrid Modeling and Control of the Common-Rail Injection System0 aHybrid Modeling and Control of the CommonRail Injection System  a1780 - 17950 v803 aWe present an industrial case study in automotive control of significant complexity: the new common rail fuel injection system for Diesel engines, currently under production by Magneti Marelli Powertrain.In this system, an inlet metering valve, introduced before the High Pressure (HP) pump, regulates the fuel flow that supplies the common rail according to the engine operating point (e.g. engine speed, desired torque). The standard approach followed in automotive control is to use a mean–value model for the plant and to develop a controller based on this model.I n this particular case, this approach does not provide a satisfactory solution as the discrete–continuous interactions in the fuel injection system, due to the slow time–varying frequency of the HP pump cycles and the fast sampling frequency of sensing and actuation, play a fundamental role.W e present a design approach based on a hybrid model of the Magneti Marelli Powertrain common–rail fuel–injection system for four-cylinder multi–jet engines and a hybrid approach to the design of a rail pressure controller.T he hybrid controller is compared with a classical mean–value based approach to automotive control design whereby the quality of the hybrid solution is demonstrated.10aAutomotive10aEmbedded Control1 aBalluchi, A1 aBicchi, A.1 aMazzi, E1 aSangiovanni-Vincentelli, A1 aSerra, G  uhttp://95.110.227.16/publications/hybrid-modeling-and-control-common-rail-injection-system.html01749nas a2200181   4500008004100000245004900041210004700090300001000137520121700147653002101364653001301385100001601398700001501414700001301429700003101442700001301473856008101486       2007                        eng d00aHybrid Multi-rate Control of the Common-Rail0 aHybrid Multirate Control of the CommonRail  a54-613 a<p>We present an industrial case study in automotive control of significant complexity: the new common-rail fuel- injection system for Diesel engines developed by Magneti Marelli Powertrain. In this system, an inlet metering valve, inserted before the High Pressure (HP) pump, regulates the fuel flow that supplies the common rail according to the engine operating point (e.g. engine speed and torque). The standard approach to controller design adopted in the automotive in- dustry is based on mean-value models of the plant. However, the fuel injection system exhibits complex discrete-continuous interactions, due to the slow time-varying frequency of the HP pump cycles and the fast sampling frequency of sensing and actuation. Hence, a hybrid approach to controller design is very promising. In this paper, we present the synthesis of a hybrid multi-rate controller for a Magneti Marelli Powertrain common-rail fuel- injection system for four-cylinder multi-jet engines. Controller design is based on a hybrid model of the injection system. The resulting hybrid controller performs significantly better then previous controllers developed in the company on the basis of mean-value models of the plant.</p>
10aEmbedded Control10aRobotics1 aBalluchi, A1 aBicchi, A.1 aMazzi, E1 aSangiovanni-Vincentelli, A1 aSerra, G  uhttp://95.110.227.16/publications/hybrid-multi-rate-control-common-rail.html