METHOD OF FEEDFORWARD TURBOCHARGER CONTROL FOR BOOSTED ENGINES WITH MULTI-ROUTE EGR

摘要

An engine includes an exhaust gas recirculation system with a high pressure exhaust gas recirculation loop and a low pressure exhaust gas recirculation loop, and an air charging system. A method of controlling the air charging system includes monitoring an actual exhaust gas recirculation rate, operating conditions of a compressor and turbine in the air charging system. A compressor flow is determined based on a target exhaust gas recirculation rate, a target intake manifold pressure and the actual exhaust gas recirculation rate. A power requested by the compressor is determined based on the compressor flow, the target intake manifold pressure, and the monitored operating conditions of the compressor. A power to be generated by the turbine is determined based upon the power requested by the compressor. A turbine flow is determined based upon the power to be generated by the turbine and the monitored operating conditions of the turbine. A system control command is determined based on the turbine flow and the monitored operating conditions of the turbine. The air charging system is controlled based on the system control command.

主权项

1. Method of model-based control of an air charging system in an internal combustion engine including an exhaust gas recirculation system with a high pressure exhaust gas recirculation loop and a low pressure exhaust gas recirculation loop, the method comprising:
monitoring an actual exhaust gas recirculation rate; monitoring operating conditions of a compressor in the air charging system and operating conditions of a turbine in the air charging system; determining a compressor flow based on a target exhaust gas recirculation rate, a target intake manifold pressure and the actual exhaust gas recirculation rate; determining a power requested by the compressor in the air charging system based on the compressor flow, the target intake manifold pressure, and the monitored operating conditions of the compressor; determining a power to be generated by the turbine based upon the power requested by the compressor; determining a turbine flow based upon the power to be generated by the turbine and the monitored operating conditions of the turbine; determining a system control command for the air charging system based on the turbine flow and the monitored operating conditions of the turbine; and controlling the air charging system based on the system control command.