초록 ▼

The present invention relates to a method and an apparatus for controlling a car equipped with an automatic transmission having a lockup clutch. According to the control method of the present invention, when the lockup clutch is in the lockup state, a variation of a generated torque is detected. Whe

The present invention relates to a method and an apparatus for controlling a car equipped with an automatic transmission having a lockup clutch. According to the control method of the present invention, when the lockup clutch is in the lockup state, a variation of a generated torque is detected. When the range of the torque variation detected exceeds a predetermined value, an engine torque is reduced by controlling the engine, and the automatic transmission is controlled to compensate for a reduction of the driving torque due to a reduction of the engine torque. Thus, the speed change ratio is changed to the low gear side. The control unit of the present invention includes a unit for controlling an output torque of an engine according to a command value, a unit for changing the transmission ratio of the automatic transmission, a unit for detecting a variation of the engine torque, a unit for deciding a target driving torque, a unit for reducing a torque command value when the range of a detected variation of the torque has exceeded a predetermined value when the lockup clutch was in the lockup state, and a unit for deciding a transmission ratio at which the reduction of the driving torque due to the reduction of the engine torque is compensated for.

대표청구항 ▼

[ What is claimed is:] [1.] An apparatus for controlling an engine capable of lean mixture operation, comprising:an engine speed detecting unit for detecting an engine speed of said engine;an engine torque determining unit for determining a target engine torque corresponding to an acceleration requi

[ What is claimed is:] [1.] An apparatus for controlling an engine capable of lean mixture operation, comprising:an engine speed detecting unit for detecting an engine speed of said engine;an engine torque determining unit for determining a target engine torque corresponding to an acceleration requirement; anda storage unit for storing data map indicating values of target throttle opening of said engine with respect to parameters of said engine speed and said target engine torque, a plurality of sets of said values of target throttle opening being stored in said storage unit, and said sets being provided for different air-fuel ratio values of the mixture.