| 摘要 |
PROBLEM TO BE SOLVED: To avoid deterioration of control performance and malfunction such as generation of knocking and worsening of exhaust gas or the like due to adhesion and accumulation of deposits in an EGR valve. SOLUTION: An EGR partial pressure is calculated by referring to an engine speed, an intake pipe internal pressure, and an opening of the EGR valve, and control of the internal combustion engine based upon these is carried out. A difference between an estimated value and an actual measured value of the intake pipe internal pressure is determined after referring to the engine speed, the EGR partial pressure, and a throttle valve opening and estimating the intake pipe partial pressure, and if the difference is the same as or more than a predetermined value, a decreasing rate of an EGR gas amount is acquired from the difference and the EGR partial pressure, and the control of the internal combustion engine is compensated on the basis of the decreasing rate. COPYRIGHT: (C)2011,JPO&INPIT
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