Air-intaking and exhausting apparatus in air cooling systems for power drive unit (pdu) and voltage down-converter

摘要

An air inlet (21) is provided at the bottom of a vehicle to open downwardly. The air inlet (21) is connected by a first tube (22) to an air cooler (23) for a PDU (9) and a down converter (10). A fan (24) for inputting the flow of air and turning its direction 90 degrees is connected at the downstream of the air cooler (23). The fan (24) is further connected by a second tube (25) to an exhaust outlet (26). The air inlet (21) is located above a fuel tank (17) thus to prevent any object jumping up from the road surface from straightforwardly entering the air inlet (21) while the vehicle is running. The exhaust outlet (26) is located above a silencer (19) and can thus be prevented from being frozen in the winter. Using the above arrangement, the present invention embodies an air-intaking and exhausting apparatus in an air cooling system for air cooling the PDU (9) and the down converter (10) at higher efficiency without the help of the air cooler mounted in the interior of the vehicle.