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Method and apparatus for controlling exhausted gas emissions during cold-start of an internal combustion engine
Method and apparatus for controlling exhausted gas emissions during cold-start of an internal combustion engine
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机译:在内燃机冷启动期间控制废气排放的方法和设备
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摘要
An in-cylinder ion sensor provides a signal representative of the air/fuel ratio of the charge mixture as an engine starts. The signal representative of the air/fuel ratio is used as a feedback signal for an electronic control unit to perform cold-start closed-loop control during an initial operating period from a cold-start before an on-board oxygen sensor is able to warm up. After reaching a functional operating temperature, the oxygen sensor provides a signal that is used as an adaptive calibration tool which allows the electronic control unit to calibrate the ion sensor signal and use that signal for controlling the air/fuel ratio during cold start operation.
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