Method and control system for seamless transitions between spark ignition and auto-ignition in an internal combustion engine

摘要

A method comprising: determining a first operating limit for a homogeneous compression ignition (HCCI operating limit); a first fuel rate is determined based on an operator input; the first HCCI operating limit is changed to a modified limit in response to a measured mass air flow rate, cam positions and the first HCCI operating limit, wherein the changing comprises the first HCCI operating limit in response to a calculated maximum fueling rate that is in response to a modified HCCI operating limit measured air mass flow rate is determined, is changed to a modified limit; and operating a motor (102) in a spark ignited mode when a request for a second fuel rate is outside the modified limit.