| 摘要 |
A reference EGR opening EGR_s is calculated based on an EGR opening map D(Ne, L) in which the relation of engine speed Ne, load L and EGR opening is stored, a reference EGR rate EGR_std is calculated based on an EGR rate map R(Ne, L) in which the relation of engine speed Ne, load L and EGR rate is prestored, an index EGR rate EGR_t is calculated based on the detection results from a first temperature sensor (61) for detecting the temperature of exhaust gas flowing through an EGR passage (30), a second temperature sensor (62) for detecting the temperature of mixture of intake gas and exhaust gas flowing through an intake passage (10), and a third sensor (63) for detecting the temperature of intake gas flowing through the intake passage (10), a corrected EGR value EGR_re is calculated based on the reference EGR rate EGR_std and index EGR rate EGR_t, and then a corrected EGR opening EGR_s_re is calculated by correcting the reference EGR opening EGR_s based on the corrected EGR value EGR_re and transmitted as a control signal to the EGR regulation valve (35). |
