HYBRID-VEHICULAR INTERNAL COMBUSTION ENGINE START CONTROL APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a hybrid-vehicular internal combustion engine start control apparatus capable of suppressing deterioration of fuel economy by selecting a transmission ratio with high transmission efficiency without allowing a specific component of emission to exceed a limit when cold-starting the internal combustion engine.SOLUTION: An internal combustion engine start control apparatus performs: determining a change amount of an operation point of an internal combustion engine 2 at a start on the basis of an engine temperature and required torque so that a PN that is a specific component of emission of the internal combustion engine does not exceed a limit; selecting, from among plural transmission stages of an automatic transmission 10, a transmission stage that yields the best integrated transmission efficiency that is produced by integrating respective transmission efficiency of the automatic transmission 10 and a power division mechanism 5 after changing the operation point; and changing to the selected transmission stage before starting the internal combustion engine 2.SELECTED DRAWING: Figure 1