System and method for controlling an engine

摘要

A system and method for controlling an engine is provided. The engine includes first and second pressure responsive devices varying compression ratios in first and second engine cylinders, respectively. The method includes commanding the first and second devices to decrease compression ratios in the first and second cylinders, respectively. The method further includes indicating when the first device has not decreased a compression ratio in the first cylinder. Finally, the method includes commanding the second device to increase a compression ratio in the second cylinder to reduce engine torque fluctuations.