Control apparatus and control method for internal combustion engine

摘要

When EGR is on (YES in S100), an ECU selects a first map for the time when EGR is on as an intake air temperature correction map (S 102). Thus, an intake air temperature correction retardation amount α is set to an intake air temperature correction retardation amount αon (THa, KL) for the time when EGR is on, which corresponds to an intake air temperature THa and an engine load KL. On the other hand, when EGR is off (NO in S100), the ECU selects a second map for the time when EGR is off as an intake air temperature correction map (S 104). Thus, the intake air temperature correction retardation amount α is set to an intake air temperature correction retardation amount αoff (THa, KL) for the time when EGR is off, which corresponds to the intake air temperature THa and the engine load KL.

主权项

1. A control apparatus for an internal combustion engine equipped with a recirculation device for returning part of exhaust gas to an intake side, comprising:
a calculation portion that calculates a retardation amount indicating an amount by which a base ignition timing determined by an operation state of the internal combustion engine is corrected toward a retardation side, in accordance with at least an intake air temperature as a temperature of a gas sucked into the internal combustion engine from among (i) the intake air temperature, (ii) a coolant temperature as a temperature of a coolant for cooling the internal combustion engine, and (iii) an oil temperature as a temperature of an oil in the internal combustion engine; and a control portion that controls an ignition timing of the internal combustion engine with reference to a set ignition timing obtained by retarding the base ignition timing in accordance with the retardation amount, wherein the calculation portion calculates the retardation amount as a larger value when the recirculation device is in operation than when the recirculation device is stopped, and the retardation amount includes an intake air temperature retardation amount indicating an amount by which the base ignition timing is corrected toward the retardation side in accordance with the intake air temperature as the temperature of the gas sucked into the internal combustion engine.