초록 ▼

A system and method for controlling a turbocharged compression-ignition engine having an intercooling system that uses a predetermined coolant fluid is provided. The engine is configured to receive a predetermined combustion-supporting fluid into a plurality of cylinders through a respective intake

A system and method for controlling a turbocharged compression-ignition engine having an intercooling system that uses a predetermined coolant fluid is provided. The engine is configured to receive a predetermined combustion-supporting fluid into a plurality of cylinders through a respective intake manifold. The method allows for detecting a full or high load engine condition using the amount of fuel injected into a cylinder per cylinder cycle and/or throttle notch position. The method also allows for sensing a predetermined parameter indicative of a respective ambient condition. The method further allows for selecting a desired value of a predetermined operational parameter that influences peak pressures developed within the cylinders. The desired value being selected based on the value of the parameter indicative of the ambient condition. A comparing step allows for comparing an actual value of the operational parameter against the desired value of that operational parameter. An actuating step allows for selectively actuating the intercooling system based on the results of the comparison step to adjust the actual value of the operational parameter to reduce engine NO.sub.x emission and contain cylinder peak pressure within acceptable limits during high load operations regardless of the ambient condition with minimal deterioration in engine output performance and capability.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method for controlling a turbocharged compression-ignition engine during a full or high load condition, the engine having an intercooling system that uses a predetermined coolant fluid, the engine being configured to receive a predetermined combustion-supporting fluid

[ What is claimed is:] [1.]1. A method for controlling a turbocharged compression-ignition engine during a full or high load condition, the engine having an intercooling system that uses a predetermined coolant fluid, the engine being configured to receive a predetermined combustion-supporting fluid into a plurality of cylinders through a respective intake manifold, the method comprising:detecting the presence of the full and/or high load condition of the engine;sensing a parameter indicative of a respective ambient condition;selecting a desired value of a respective operational parameter that influences peak pressures developed within the cylinders, the desired value being selected based on the value of the parameter indicative of the respective ambient condition;comparing an actual value of the operational parameter against the desired value of that operational parameter; andselectively actuating the intercooling system based on the results of the comparison step to adjust the actual value of the operational parameter to contain the peak cylinder pressures.