INTAKE PASSAGE CROSS SECTIONAL AREA CONTRACTION RING FOR INTERNAL COMBUSTION ENGINE AND SET THEREOF, AND METHOD FOR CHANGING OUTPUT CHARACTERISTIC OF INTERNAL COMBUSTION ENGINE BY ATTACHING THESE

摘要

PROBLEM TO BE SOLVED: To provide a tool that is easy to be post-fitted and can be mounted as it is without processing an existing facility, and in which obvious change of an output characteristic can be expected such as improvement in torque, response etc.;SOLUTION: An intake passage cross sectional area contraction ring for an internal combustion engine, which can be fitted to an intake outlet part 16 of an air cleaner box 12 included in a vehicle and in which an open hole 104 is formed so as to be set to 40% or more and 80% or less of the cross sectional area of the intake passage of the intake outlet part 16, is attached to the intake outlet part 16 of the air cleaner box 12.;COPYRIGHT: (C)2016,JPO&INPIT