METHOD FOR REGULATING A BOOST PRESSURE OF AN ENGINE

摘要

In a method for regulating a boost pressure of an engine which has a compressor, an actual boost pressure and a setpoint boost pressure are used as input parameters. The setpoint boost pressure is regulated in such a way that a pressure ratio in the compressor does not exceed a limit pressure ratio. A reference boost pressure is ascertained based on a speed of the engine and a load of the engine. A flow and/or a pressure of air supplied to the engine is/are detected and an associated flow signal and/or pressure signal is generated. The smaller of the reference boost pressure and a limit boost pressure is used as a setpoint boost pressure. The limit boost pressure is ascertained based on a limit boost pressure ratio and a speed of the compressor.

主权项

1. A method for regulating a boost pressure of an engine which has a compressor, the method comprising:
ascertaining a reference boost pressure based on a speed of the engine and a load of the engine; detecting at least one of a flow and a pressure of air supplied to the engine, and generating at least one of an associated flow signal and a pressure signal; using the smaller of the reference boost pressure and a limit boost pressure as a setpoint boost pressure; and regulating the setpoint boost pressure in such a way that a pressure ratio in the compressor does not exceed a limit boost pressure ratio; wherein the limit boost pressure ratio is ascertained based on a magnitude of a change over time of the at least one of the flow signal and the pressure signal, and wherein the limit boost pressure is ascertained based on the limit boost pressure ratio and a speed of the compressor.