Experimental Determination of the Residual Torque Range in a Plastic Connector of the Fuel Pump Module at End of Life Robert Bosch Ltda

Format:

Book

Conference/Event

Author/Creator:

Spitaletti, Laís Scotelari, author.

Contributor:

da Fonseca, Márcio Ghiraldelli

Conference Name:

SAE Brasil 2024 Congress (2024-10-16 : Sao Paolo, Brazil)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2024

Summary:

The study of residual torque is necessary in various fields to ensure the safety and reliability of bolted joints.The present study aims to determine, experimentally, the decrease in torque applied to a nut used in the assembly of two polymeric components (POM - Polyoxymethylene). These components are part of the fuel supply module, responsible for supplying fuel from the tank to the engine. This reduction in torque initially applied is mapped to the end-of-life of the components and is used as an approval criteria in the audit procedures of the Robert Bosch company. The first component features an overmolded metallic screw, injected into POM. The mating part is also injection molded from POM and is assembled onto the first part, secured by tightening a metal nut. Due to the plastic-to-metal interface, it's expected that there will be a reduction in the initially applied torque required to fasten the pieces together.The study was based on 5 steps:After the study was completed, it was determined a minimum residual torque, for the end of the product's life, in this application. This criterion enables more accurate control in field part verification, improves product quality, and optimizes failures identification

Notes:

Vendor supplied data

Publisher Number:

2024-36-0129

Access Restriction:

Restricted for use by site license