Cylinder combustion performance monitoring and control with coordinated torque control

Abstract

An engine control system includes a disturbance module, a torque correction module, a torque-to-spark module, and a spark correction module. The disturbance module determines a disturbance value for a past combustion stroke of a cylinder of an engine based on rotation of a crankshaft. The torque correction module selectively determines a torque correction for a future combustion stroke of the cylinder based on the disturbance value. The torque-to-spark module determines a spark correction based on the torque correction and determines an uncorrected spark timing based on a torque request. The spark correction module determines a corrected spark timing based on the uncorrected spark timing and the spark correction and generates spark during the future combustion stroke based on the corrected spark timing.

Description

[0001] Cross References to Related Applications [0002] This application is related to US Patent Application No. XX / XXXXXX filed on XX / XX, 2010 (GM Docket No. P010230-PTCS-CD). The disclosures of the aforementioned applications are incorporated herein by reference in their entirety. technical field [0003] The present disclosure relates to internal combustion engines, and more particularly, to combustion control systems and methods. Background technique [0004] The background description provided herein is for the purpose of generally presenting the context of the disclosure. The work of the presently named inventors, to the extent described in this Background section, and aspects of this description that are otherwise insufficient to be prior art at the time of filing, are neither expressly nor impliedly admitted to be relevant to The present invention counteracts prior art. [0005] A vehicle includes an engine that produces torque. The engine transmits torque throu...

AI Technical Summary

Problems solved by technology

That is, some cylinders may be weaker than others, resulting in a torque imbalance between cylinders

This torque imbalance can create noticeable vibrations in the powertrain and may even be felt by the driver of the vehicle

Images