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US09228518B2 Methods and system to prevent exhaust overheating 有权
防止排气过热的方法和系统

Methods and system to prevent exhaust overheating
Abstract:
Various methods and systems are provided for lowering exhaust gas temperature. In one embodiment, a method comprises increasing an air-to-fuel ratio of an engine in response to an exhaust gas temperature exceeding a threshold temperature value to lower the exhaust gas temperature to a temperature below the threshold temperature value.
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