Auxiliary machine mounting structure for and engine

As a conventional mounting structure, it was provided an auxiliary machine mounting structure for an engine such that a plural mounting portions formed integrally on the outer circumferential surface of an auxiliary machine and a bracket (a portion to be mounted) formed on engine were fastened by bolts. In such structure, as the mounting portions extended in the tangential direction of the machine, they protrude far in the radial direction of the main body of the machine. And it was requested that the structure enables to mount the machine to the bracket, whatever structure of the bracket is. The present invention is such that four mounting portions are formed on a housing of a compressor as an auxiliary machine for an engine. A mounting hole formed in the mounting portion is constituted by the following two axes. One is the axis substantially right-angle to a mounting surface of the mounting portion and the other is the axis which is inclined at predetermined angle to the above axis in the tangential direction of the housing. The intersection of the two axes is positioned such that the distances between the intersection and the opposite openings are equal.