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    • 3. 发明授权
    • Method and system for internal combustion engine oxygen sensor heating
control which provide maximum sensor heating after cold engine starting
    • 内燃机氧传感器加热控制方法和系统,在发动机冷起动后提供最大传感器加热
    • US4655182A
    • 1987-04-07
    • US666388
    • 1984-10-30
    • Jiro NakanoTakao IshibashiTakao AkatsukaMamoru Takata
    • Jiro NakanoTakao IshibashiTakao AkatsukaMamoru Takata
    • F02D41/00F02D41/06F02D41/14G01N27/12G01N27/409
    • F02D41/061F02D41/1494
    • An internal combustion engine has an exhaust system and an oxygen sensor fitted to the exhaust system including a sensor element and an electrically powered heater for heating the sensor element. A method for controlling the electrical power supplied to the heater properly and quickly heats up the sensor element after engine starting from the cold condition. At the time of starting up the engine it is determined whether or not the temperature of the engine is less than a certain value. If so, the heater is provided with electrical power to the maximum practicable amount, for a certain time interval after the engine is started up. Thereby, during engine heating up operation, the temperature of the sensor element is brought up to its minimum proper operating temperature as quickly as practicable, and accordingly it is ensured that engine performance and the quality of exhaust gas emissions at the time of such engine warming up operation are good. A system is also described for implementing this method.
    • 内燃机具有排气系统和安装在排气系统上的氧传感器,该排气系统包括用于加热传感器元件的传感器元件和电动加热器。 一种用于在从冷态发动机起动之后,适当地控制供应给加热器的电力并迅速加热传感器元件的方法。 在启动发动机时,确定发动机的温度是否小于一定值。 如果是这样,在发动机起动之后的一段时间间隔内,加热器被提供最大可行的量的电力。 因此,在发动机加热运转时,传感器元件的温度尽可能快地达到其最小正常工作温度,因此确保发动机性能和发动机加热时废气排放质量 上班操作不错。 还描述了用于实现该方法的系统。