TORQUE COMPENSATION FOR DETONATION

摘要

In one aspect, a method for mitigating detonation in a skip fire engine control system is described. The working chambers of the engine are operated in a skip fire manner to deliver a desired torque. One or more detonations are detected in the engine. In response to the detection of the one or more detonations, the spark timing for one or more of the working chambers is retarded. Additionally, the firing fraction used to operate the engine is increased. The increase in the firing fraction helps to compensate for torque lost due to the retarding of the spark timing.

主权项

1. A method for mitigating detonation and managing torque in a spark ignition internal combustion engine operated in a skip fire manner, the engine having a plurality of working chambers, the method comprising:
operating the working chambers of the engine in a skip fire manner to deliver a desired torque based on a firing fraction; detecting one or more detonations in a working chamber of the engine; in response to the detection of the one or more detonations, retarding spark timing for one or more of the working chambers; automatically increasing the firing fraction used to operate the engine such that the increased firing fraction helps compensate for torque lost due to the retarding of the spark timing; and operating the working chambers of the engine in a skip fire manner based on the increased firing fraction to deliver the desired torque.