کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
699468 | 890770 | 2013 | 11 صفحه PDF | دانلود رایگان |

Homogeneous charge compression ignition (HCCI) presents new challenges in combustion phasing control due to the lack of direct ignition trigger. In addition, recompression HCCI possesses cycle-to-cycle coupling through trapping a large portion of the exhaust gas in the cylinder. This paper examines the change in the cycle-to-cycle coupling around different operating points in recompression HCCI and show that there are three qualitative types of temperature dynamics: smooth decaying when combustion phasing is early, oscillatory when phasing is late, and strongly converging with moderate combustion phasing. As a result, a three region switching linear model that combines three linearized models can capture the qualitative change in system characteristics. Based on this model, a three region switching controller is designed and shown in experiments that it can track a wide range of desired combustion phasing and improve the variance of combustion phasing over open-loop operations. In the last part of this paper, two semi-definite programming (SDP) formulations are presented to prove the stability of the switching control/model framework.
► Observed three types of temperature dynamics of HCCI.
► Developed a switching linear model to capture the change in system behavior.
► Developed a switching controller that can track a wide range of combustion phasing.
► Improved the variance of combustion phasing with the proposed controller.
► Established the stability properties of the switching control/model framework.
Journal: Control Engineering Practice - Volume 21, Issue 2, February 2013, Pages 135–145