Method of estimating duration of auto-ignition phase in a spark-assisted compression ignition operation

摘要

A combustion engine system in one embodiment includes a combustion engine, at least one controllable component operably connected to the combustion engine, at least one sensor configured to sense a parameter associated with the combustion engine, and an electronic control unit (ECU) operably connected to the at least one controllable component and the at least one sensor, wherein the ECU is configured to determine a temperature of an unburned mixture based upon the sensed parameter, and control the at least one controllable component based upon the determined temperature.

主权项

1. A combustion engine system, comprising:
a combustion engine; at least one controllable component operably connected to the combustion engine; at least one sensor configured to sense a parameter associated with the combustion engine; and an electronic control unit (ECU) operably connected to the at least one controllable component and the at least one sensor, wherein the ECU is configured to
determine a temperature of an unburned mixture based upon the sensed Parameter, andcontrol the at least one controllable component based upon the determined temperature, wherein the ECU is configured to control the at least one controllable component based upon the following equation:
ln(ΔθAI)=α(Tu|θAI)+β,wherein “ΔθAI” is the auto-ignition combustion duration in time or crank angle,
“Tu” is the determined temperature of the unburned mixture that will ultimately undergo auto-ignition, “θAI” is the time or engine position at combustion initiation, and “α” and “β” are parameters associated with an operating condition of the engine system.