| 摘要 |
PROBLEM TO BE SOLVED: To improve torque reduction precision, and restrict torque level difference. SOLUTION: For upshifting speed change (S13), in a case of exhaust temperature below a preset prescribed value (S14), a suction air quantity estimation torque value is determined based on suction air quantity, and a torque reduction ratio (first torque reduction ratio) is determined using a torque correction value determined in accordance with the suction air quantity estimation torque value and speed change ration variation (S15). Engine torque is controlled using ignition timing retard quantity based on the torque reduction ratio (first torque reduction ratio). Since the ignition timing retard quantity is thus determined using the suction air quantity estimation torque value that is close to actual torque, torque reduction precision by retard of the ignition timing is improved to restrict torque shock due to torque level difference, while robustness is greatly improved. COPYRIGHT: (C)2008,JPO&INPIT
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