Clutch operational control apparatus

A clutch operational control apparatus for controlling an engaging force of a clutch provided in a power transmitting path from an engine through an automatic transmission to drive wheels with the power transmitting path being controlled by the clutch, comprising;

• idling state detecting means for detecting whether the engine is in an idling state;
• braking operation detecting means for detecting whether a vehicle brake is applied;
• vacuum pressure detecting means for detecting an actual intake vacuum pressure of the engine;
• range judging means for judging whether a shift position of a manual shift means of the automatic transmission is in one of a driving range and a non-driving range;
• target intake vacuum pressure determining means for determining a target intake vacuum pressure based on the actual intake vacuum pressure when said range judging means judges that the shift position is at the non-driving range and further when said idling state detecting means detects that the engine is in the idling state;
• creep-mode selection means for selecting a first creep-mode when said range judging means judges that the shift position is in the driving range and further when by said braking operation detecting means detects that the vehicle brake is not applied, and for selecting a second creep-mode when said range judging means judges that the shift position is in the driving range and further when said braking operation detecting means detects that the vehicle brake is applied;
• the creep force transmitted through the clutch being larger in said first creep-mode than in said second creep-mode;
• and
• clutch engaging force control means for controlling the clutch engaging force so that the actual intake vacuum pressure coincides with the target intake vacuum pressure when said second creep-mode is selected by said creep mode selection means.