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Technical Paper

Understanding catalyst overheating protection (COP) as a source of post-TWC ammonia emissions from petrol vehicle

2022-08-13
2022-01-1032
In this research, the formation of post-catalyst ammonia emission from a China-6a certified light-duty vehicle was examined at the chassis level, with the presence of catalyst overheating protection (COP). Given the well-aligned changes in catalyst temperature and ammonia concentration, a COP event has been confirmed as a source of extra ammonia emission because it required the use of richened air-fuel mixtures which resulted in high CO and THC emissions. The results also inferred that post-catalyst ammonia from a gasoline vehicle could be formed at any temperature once the catalyst got warm enough, unlike it was reported in some prior reactor-based studies that there was a so-called “celling temperature”, and above which, the production rate of post-catalyst ammonia would be restricted. Moreover, ammonia storage phenomenon in the constant volume sampling (CVS) system at a time scale of a few hundred seconds was observed, which in general agreed with previous publications.
Training / Education

AS9145 Requirements for Advanced Product Quality Planning and Production Part Approval

2022-06-28
Production and continual improvement of safe and reliable products is key in the aviation, space and defense industries. Customer and regulatory requirements must not only be met, but they are typically expected to exceeded requirements. Due to globalization, the supply chain of this industry has been expanded to countries which were not part of it in the past and has complicated the achievement of requirements compliance and customer satisfaction. The IAQG has established and deployed the AS9145 Standard, as a step to help achieve these objectives.
Technical Paper

Lightweight Design and Additive Manufacturing of a Fatigue-Critical Automotive Component

2022-06-14
2022-37-0026
Metal additive manufacturing is finding growing applicability in motorsports and high performance car sectors. Laser-Powder Bed Fusion (L-PBF) is the most developed AM technology for lightweight aluminum alloys producing near-net-shape components of complex geometry that achieve outstanding lightweight targets. A key issue in the widespread industrial acceptability of L-PBF is the structural integrity of these lightweight components when subjected to dynamic loading conditions because it requires in-depth knowledge of the fatigue behavior of L-PBF aluminum under the combined effect of stress gradients, residual stresses, surface condition and process-induced internal defects.
Technical Paper

Lightweight Components Manufactured with In-Production Composite Scraps: Mechanical Properties and Application Perspectives

2022-06-14
2022-37-0027
In the last years, the design in the automotive sector is mainly led by emission reduction and circular economy. To satisfy the first perspective, composites materials are being increasingly used to produce lightweight structural and semi-structural components. However, the automotive mass production arises the problem of the end-of-life disposal of the vehicle and the reduction of the wastes environmental impact. The circular economy of the composite materials has therefore become a challenge of primary importance for car manufacturers and tier 1 suppliers. It is necessary to pursue a different economic model, combining traditional raw materials with the intensive use of materials from recycling processes. New technologies are being studied and developed concerning the reuse of in-line production scraps with out-of-autoclave process that makes them desirable for high production rate applications.
Standard

Elastomer: Chloroprene Rubber (CR) Weather Resistant 35 - 45

2022-06-13
CURRENT
AMS3240L
This specification covers a chloroprene rubber (CR) that can be used to manufacture product in the form of sheet, strip, tubing, extrusions, and molded shapes such as window channels, bumper pads, chafing strips, etc. For molded rings, compression seals, molded O-ring cord, and molded-in-place gaskets for aeronautical and aerospace applications, use the equivalent AMS7XXX specification.
Standard

Elastomer: Chloroprene Rubber (CR) Weather Resistant 55 - 65

2022-06-13
CURRENT
AMS3241K
This specification covers a chloroprene (CR) rubber that can be used to manufacture product in the form of sheet, strip, tubing, extrusions, and molded shapes such as window channels, bumper pads, chafing strips, etc. For molded rings, compression seals, molded O-ring cord, and molded-in-place gaskets for aeronautical and aerospace applications, use the equivalent AMS7XXX specification.
Standard

Polyimide Printed Circuit Boards Fabrication of

2022-06-05
CURRENT
ARP1612A
This document describes the materials, equipment, and processing techniques utilized in the fabrication of polyimide printed wiring boards. Included are recommendations for both double-sided and multilayer boards.
Standard

Acrylonitrile Butadiene (NBR) Rubber Aromatic Fuel Resistant 75 - 85

2022-05-20
WIP
AMS3213N
This specification covers a nitrile (NBR) rubber in the form of sheet, strip, tubing, extrusions, and molded shapes. Primarily for parts, such as gaskets, diaphragms, bushings, grommets, and sleeves, requiring resistance to aromatic and aliphatic fuels when continuously or alternately exposed to both.
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