Method for the optimization of a valve lift change-over in internal combustion engines

摘要

The acceleration characteristic of a spark ignition engine is determined based on the engine operating data such as torque data acquired during the valve-lift changeover of the engine. The irregularity in the acceleration characteristic is determined by evaluating a segment time based on a crankshaft signal. The lambda characteristic of the valve-lift changeover is evaluated by correcting the cylinder charging error or torque error if the acceleration characteristic irregularity is determined.