Method of manufacturing catalytic converters
AssigneeHirotec Corporation
InventorsNaoyuki Kobayashi, Etsuo Kosaka, Kazuo Tanigawa
Life of this patent
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Abstract
A method of manufacturing a catalytic converter includes the steps of: a detecting step for detecting a pressing force at a time when a catalyst (11) is press-fitted into an outer cylindrical housing (13); a calculating step for calculating a diameter reduction, by which a clearance value between the outer cylindrical housing (13) and the catalyst (11) is set to a desired target value, based on the pressing force detected by the detecting step; and a swaging step for reducing a diameter of the outer cylindrical housing (13) based on the diameter reduction calculated by the calculating step.
Claims18
A method of manufacturing a catalytic converter a catalyst whose outer peripheral surface is wrapped with a mat, and an outer cylindrical housing which includes at least a reduced-diameter portion to support therein the catalyst and the mat, the method comprising the steps of:
- providing a pressing device, and thereby press-fitting the catalyst and the mat into the outer cylindrical housing along a longitudinal direction of the outer cylindrical housing;
- a detecting step of detecting a longitudinal pressing force at a time when at least a portion of the catalyst is within an enlarged-diameter portion of the outer cylindrical housing while the pressing device is pressing the catalyst and the mat in the longitudinal direction into the outer cylindrical housing;
- a determining step of determining a diameter reduction of the outer cylindrical housing, by which a clearance value between the outer cylindrical housing and the catalyst is set to a desired target value, as a function of the longitudinal pressing force detected by the detecting step;
- and
- a swaging step of reducing a diameter of the outer cylindrical housing based on the diameter reduction calculated by the determining step.
Dependencies are inferred from the claim text.