Patent ID: 6672989
Filing Date: 2004-01-06
Classification: F02D,Y02T,Y10S,Y10T

Abstract:
A direct injection type engine provided with an exhaust passage, comprising:a variable speed transmission connected with the engine and able to freely change a gear ratio; an exhaust purification device arranged in the exhaust passage; and a control device for controlling a torque generated by the engine and a gear ratio of the variable speed transmission; at least two control lines which include a first control line and a second control line at a high torque side and low speed side of the first control line in the same required output being set as engine control lines showing the relationship between the engine rotational speed and required torque required for obtaining a required output, said control device causing the engine to generate a required torque on the first control line in accordance with the required output and controlling the gear ratio of the variable speed transmission to give an engine rotational speed on the first control line in accordance with the required output when the extent of activation of the exhaust purification device is low, said control device causing the engine to generate a required torque on the second control line in accordance with the required output and controlling the gear ratio of the variable speed transmission to give an engine rotational speed on the second control line in accordance with the required output when the extent of activation of the exhaust purification device is high; wherein under an engine rotational speed and required torque on the second control line, the fuel economy is better than by the first control line, but the amount of harmful components in the exhaust gas becomes greater.