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Specifying method of EGR rate in internal combustion engine and control apparatus of internal combustion engine
Specifying method of EGR rate in internal combustion engine and control apparatus of internal combustion engine
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机译:内燃机中EGR率的确定方法及内燃机的控制装置
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摘要
To accurately specify an EGR rate from an output value of an in-cylinder pressure sensor, a specifying method of an EGR rate in an internal combustion engine of the present invention acquires an output value of an in-cylinder pressure sensor at an intake stroke to calculate comparison data related to an in-cylinder pressure at the intake stroke from the acquired sensor output value. An output value of the in-cylinder pressure sensor at an exhaust stroke of the same cycle is also acquired to calculate comparison data related to the in-cylinder pressure at the exhaust stroke from the acquired sensor output value. Two comparison data are compared to specify the EGR rate of an air-fuel mixture provided for combustion from a difference between the values.
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