| 摘要 |
PROBLEM TO BE SOLVED: To suppress the deterioration of fuel economy caused by knocking of an engine.SOLUTION: A transmission control device (6) determines whether or not a temperature of a compression-end air-fuel mixture in a combustion chamber of an engine is within a high-temperature range, from a temperature of a cooling liquid for cooling the engine (1), and a temperature of an air-fuel mixture which is taken into the combustion chamber of the engine (1). When it is determined that the temperature of the compression-end air-fuel mixture is within the high-temperature range, the transmission control device controls a gear change ratio of a transmission (2) by using a high-temperature time gear change map, and when a compression-end air-fuel mixture temperature determination part determines that the temperature of the compression-end air-fuel mixture is not within the high-temperature range, controls the gear change ratio of the transmission (2) by using a normal time gear change map. The high-temperature time gear change map controls the gear change ratio of the transmission (2) so that an output required to the engine (1) is the same, the number of rotations of the engine (1) is increased, and a torque is reduced, in comparison with the normal time gear change map. |
