| 摘要 |
<P>PROBLEM TO BE SOLVED: To control degradation of drivability while ensuring adequate cooling capacity in a cooling circuit. <P>SOLUTION: A control unit 47 estimates and determines whether or not a PDU 14 is overheated exceeding a predetermined degree based on the operating condition of a vehicle 1, for example, the speed (the vehicle speed) V of the vehicle 1, the intake pipe negative pressure Pb, the speed Ne of an internal combustion engine 11, the temperature (the cooling water temperature) Twp of cooling water distributing in a cooling water circuit 21, and the temperature (the outside temperature) Ta outside the vehicle. When the control unit 47 determines that the PDU 14 is overheated exceeding the predetermined degree, the control unit instructs the execution of the speed change operation to switch a manual transmission 13 to the low reduction gear ratio side (in other words, to the higher stage side of a plurality of speed change stages) to a crew of the vehicle by an alarm device 48 to perform, for example, adequate display and lighting, and sound output, controls the valve opening of an expansion valve 44 or the like, and switches the operation to the low output operation by reducing the output of an air-conditioner 46. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
