| 摘要 |
PROBLEM TO BE SOLVED: To suppress excessively raising temperature of a microcomputer and a aluminum electrolytic condenser mounded on an engine room by regulating a cooling air volume of an engine control device, on the basis of a result detected by a temperature sensor disposed in the vicinity of the microcomputer. SOLUTION: A temperature in the vicinity of a microcomputer 21 is detected by a temperature sensor 11, its detected data is inputted to the microcomputer 21 through an A/D converter 12. In the case where a plurality of temperature sensors 11 are disposed, an output detected by a temperature sensor 11 showing a highest value or an output detected by a temperature sensor 11 disposed on an upper part of a major parts which consists of the microcomputer 21, an aluminum electrolytic condenser, and the like, is used. When the detected temperature is higher than a prescribed temperature, a radiator fan 41 and an air conditioning fan 42 are actuated through drivers 31, 32, and a volume of air which flows into a box for housing an engine control device including the microcomputer 21 is increased to improve cooling capability.
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