Air Handling Control For Opposed-Piston Engines With Uniflow Scavenging

摘要

In an air handling system of a uniflow-scavenged, two-stroke cycle opposed-piston engine, one or more engine operating state parameters are sensed, numerical values of air handling parameters based on trapped conditions in a cylinder of the engine at the last port closing of an engine operating cycle are determined in response to the sensed parameters, the numerical values are evaluated, and one or more of the numerical values is adjusted in response to the evaluation. The adjusted numerical values are used to control charge air flow and EGR flow in the air handling system.

主权项

1. A method of operating an opposed-piston engine, comprising:
generating exhaust gas in at least one ported cylinder of the engine; transporting exhaust gas from an exhaust port of the ported cylinder through an exhaust channel; recirculating a portion of the exhaust gas from the exhaust channel through an EGR loop; pressurizing fresh air; mixing recirculated exhaust gas from the EGR loop with the pressurized fresh air to form charge air; pressurizing the charge air with a supercharger; providing the pressurized charge air to an intake port of the ported cylinder; determining a value of a trapped air handling parameter in response to an engine operating state; and, adjusting, based on the determined value, charge air flow to the intake port.