| 摘要 |
A large turbocharged two-stroke self-igniting internal combustion engine uniflow type. The engine has a plurality 5 of cylinders (1) with scavenge ports (17) and an exhaust valve (4), an intake system through which scavenging gas is introduced into the cylinders (1), the intake system comprising a scavenge gas receiver (2) connected to the cylinders (1) via the scavenge ports 10 (17), an exhaust system through which exhaust gas produced in the cylinders is exhausted, the exhaust system comprising an exhaust gas receiver (3) connected to the cylinders via the exhaust valves (4), a turbocharger (5) having a turbine (8) that drives a 15 compressor (9) with the turbine (8) in the exhaust system and the compressor (9) in the intake system, the compressor delivering a flow of scavenge air to the scavenge gas receiver, a fuel system for delivering a flow of fuel to the cylinders (1), an EGR system for 20 conveying a flow exhaust gas from the exhaust system to the intake system and comprising at least one variable or fixed speed blower (22), a first sensor (27) providing a signal representative of the oxygen concentration Os in the scavenge gas receiver (2), and a controller (50) 25 configured to control the flow of exhaust gas through the EGR system. The controller (50) is configured to use the signal from the first sensor for feedback control, and the controller (50) is configured to use an estimate of a required recirculated exhaust gas flow for feed forward 30 control. |
