VARIABLE CAPACITY TURBO CHARGER

摘要

PROBLEM TO BE SOLVED: To favorably maintain efficiency of performance of a turbo charger when a variable capacity of the variable capacity turbo charger in enlarged. SOLUTION: A reference-positional scroll area S of an outer circumferential scroll part 25A is set to be brought into 1.2 times or less of the sum S1 of opening areas in all the communication holes 23a (the scroll area S/the sum S1<=1.2).