| 摘要 |
<P>PROBLEM TO BE SOLVED: To avoid operational instability, an increase in fuel consumption, an increase in hydrocarbon emission, and deterioration in comfort due to exhaust gas recirculation in an internal combustion engine. <P>SOLUTION: An internal combustion engine 2 is configured to have operation for sending combustion gas back into an air supply part 3 through an exhaust gas recirculation path 8. A method for the operation includes the following steps: calculating a value (σ<SB POS="POST">pmi</SB>) of operational instability indicating the criterion regarding the quality of operation of the internal combustion engine 2 from combustion chamber pressure signals; determining the correction value in accordance with a deviation of the calculated value [= the actual value] (σ<SB POS="POST">pmi</SB>) of operational instability from the limit value [= the reference value] (σ<SB POS="POST">pmi</SB>_<SB POS="POST">min</SB>, σ<SB POS="POST">pmi</SB>_<SB POS="POST">max</SB>) of the predetermined value of operational instability; and applying the correction value to the operation value for adjusting the amount of combustion exhaust gas to be recirculated. <P>COPYRIGHT: (C)2013,JPO&INPIT |
