Starting clutch control system for vehicles

A starting clutch control system applied to a vehicle in which a torque generated by an engine is inputted to a torque converter, the torque converter including a pump impeller and a turbine, the torque being outputted from the torque converter to a plurality of driving wheels through a starting clutch, the starting clutch control system being configured to stop the engine while disengaging the starting clutch upon satisfaction of a predetermined condition when the vehicle is running, and to restart the stopping engine while engaging the starting clutch upon satisfaction of a predetermined restarting condition, the starting clutch control system comprising:

• an electronic control unit configured to:
• estimate a first torque of the turbine of the torque converter based on:
• (i) an engine speed, (ii) a capacity coefficient, and (iii) a torque ratio of the torque converter, the first torque being estimated when the engine is required to increase a power to be restarted;
• increase a torque transmitting capacity of the clutch in accordance with the estimated first torque of the turbine;
• estimate a second torque of the turbine based on:
• (i) an air intake of the engine, and (ii) the engine speed, the second torque being estimated after a completion of an engagement of the clutch;
• and
• control the torque transmitting capacity of the clutch in accordance with the estimated second torque of the turbine.