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Techniques for tracking exhaust gas constituents through a low pressure exhaust gas recirculation system of a turbocharged gasoline engine
Techniques for tracking exhaust gas constituents through a low pressure exhaust gas recirculation system of a turbocharged gasoline engine
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机译:通过涡轮增压汽油机的低压排气再循环系统跟踪排气成分的技术
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摘要
Systems and methods for a turbocharged gasoline engine utilize an exhaust gas concentration sensor disposed upstream from an exhaust gas recirculation pickup point of a low pressure EGR (LPEGR) system of the engine and a controller configured to receive a measured air/fuel ratio of the exhaust gas from the sensor, determine an air/fuel ratio of the exhaust gas at the EGR pickup point, determine an air/fuel ratio of the exhaust gas at an inlet and outlet of an EGR cooler, determine first/second sets of exhaust gas fractions and fuel fractions upstream/downstream from an EGR port that is upstream from a compressor in an induction system of the engine, and control at least one of a wastegate valve, a throttle valve, a fuel injector, and a spark plug based on the sets of second exhaust gas fractions and fuel fractions to prevent misfires of the engine.
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