| 摘要 |
<P>PROBLEM TO BE SOLVED: To promptly remove condensed water that has occurred with a simple and low-cost configuration, with respect to an air cooler provided in an air supply passage, so as to prevent damage to an air supply valve and corrosion of components provided on EGR passage or air supply passage, thereby ensuring the reliability of an engine. <P>SOLUTION: With the air supply passage (as) being sandwiched by a lower header 12 provided downward thereof and an upper header 14 provided upward thereof, a row of heat transfer pipes 24a to 24e is constructed in a gravity direction (vertical direction) between the upper and lower headers. The cooling water is passed from a cooling water flow-in pipe 20 via the lower header 12 into a group 44 of heat transfer pipes, while it is subjected to heat exchange with supplied air at the group 44 of heat transfer pipes, after which it is discharged from a cooling water outflow pipe 22 via the upper header 14. The supplied air is cooled while the condensed water, which is the product of steam contained in the supplied air being condensed, runs down along the surface of the heat transfer pipes 44, to be promptly discharged from a drainage port 26. The heat transfer pipes 44 of the respective rows of heat transfer pipes are arranged in a zigzag alignment, so that condensed water can be easily captured at downstream side rows of heat transfer pipes. <P>COPYRIGHT: (C)2012,JPO&INPIT |
