System and method for control of a transition between SI and HCCI combustion modes

摘要

In one embodiment a method of controlling an engine system includes providing a first cylinder with a first inlet valve, a first outlet valve, and a first throttle, controlling the first inlet and the first outlet valve in accordance with an SI valve lift profile, activating a first spark in the first cylinder while controlling the first inlet and the first outlet valve in accordance with the SI valve lift profile, controlling the first inlet and the first outlet valve in accordance with an HCCI valve lift profile, activating a second spark in the first cylinder while controlling the first inlet and the first outlet valve in accordance with the HCCI valve lift profile, and controlling the SOI timing of the first throttle in an HCCI SOI mode while controlling the first inlet valve and the first outlet valve in the HCCI valve lift profile after activating the second spark.

主权项

1. An engine system comprising:
a first cylinder; a first inlet valve configured to control the flow of gases into the first cylinder; a first outlet valve configured to control the flow of gases out of the first cylinder; a first throttle configured to control the flow of fuel into the first cylinder; a memory including program instructions stored therein; and a processor operably connected to the first inlet valve, the first outlet valve, the first throttle, and the memory, and configured to execute the program instructions to
control the first inlet valve and the first outlet valve in accordance with a spark ignition (SI) valve lift profile,activate a first spark in the first cylinder while controlling the first inlet valve and the first outlet valve in accordance with the SI valve lift profile,control the first inlet valve and the first outlet valve in accordance with a homogeneous charge compression ignition (HCCI) valve lift profile,activate a second spark in the first cylinder while controlling the first inlet valve and the first outlet valve in accordance with the HCCI valve lift profile, andcontrol the start-of-injection (SOI) timing of the first throttle in an HCCI SOI mode while controlling the first inlet valve and the first outlet valve in the HCCI valve lift profile after activating the second spark.