| abstract |
A driving force control method is provided for engine clutch slipping of a TMED HEV that includes an engine 10 and a second motor 50, a first motor 30 disposed at a transmission side, an engine clutch 20 interposed between the engine 10 and the first motor 30, and a multi-clutch transmission 35 connected with an output terminal of the first motor 30. The method includes verifying whether a control for maintaining a target speed of the engine is achieved by an engine feedback control or by a second motor torque feedback control and applying clutch pressure for the clutch slipping with hydraulic pressure. When the clutch pressure is applied clutch slipping transmission torque is estimated. Torque of the engine clutch is equivalent to the pressure as a load. Second motor dischargeable limit torque, second motor assist torque, and engine torque are calculated to then execute a slip control. |