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The SAE J2053-2006 standard specifies performance test procedures and requirements for plastic reservoir assemblies used in hydraulic brake master cylinders for on-road vehicles. This standard is critical for ensuring safety and reliability in brake systems, addressing leakage, fluid expansion, debris…

This guide details the two methods from SAE J79-2009 for installing thermocouples in automotive brake discs or drums to measure bulk temperature during dynamometer and vehicle road tests. Although the standard was cancelled in February 2009, the procedures remain useful…

Understanding the Two-Part Test Structure SAE J2686-2022 defines a recommended practice for qualifying brake drums on highway commercial vehicles equipped with air brakes. The standard outlines a comprehensive inertia-dynamometer procedure consisting of two distinct tests that evaluate different failure modes.…

SAE J1505 provides a standardized test procedure for determining brake force distribution and threshold pressures on air braked single unit trucks, buses, and combination vehicles with a GVWR over 10,000 lbs. This recommended practice outlines instrumentation, vehicle preparation, data collection,…

Blow-by—the leakage of combustion gases past the piston rings into the crankcase—is a critical performance metric in internal combustion engines. The SAE J2797-2022 standard provides a comprehensive overview of blow-by mechanisms, emphasizing the effects of piston and ring design parameters.…

SAE J2561-2016 is a stabilized information report that provides a comprehensive overview of the Bluetooth wireless protocol tailored for automotive environments. It covers architecture, core protocols, general profiles, usage models, and critical requirements for electromagnetic compatibility, security, and network management.…

Automotive body corrosion is not a matter of opinion—it is governed by established laws of chemistry and physics. SAE Information Report J1617-2016 provides a foundational understanding of the types of body corrosion, the factors that contribute to it, testing procedures,…

This article summarizes the automotive industry’s 20+ years of experience with biodiesel, as documented in SAE standard J3050 (Issued 2014). While originally targeting the railroad and locomotive sectors, the insights are valuable for any diesel fleet considering or currently using…

SAE J1775-2015 provides a foundational description of bleed-air pneumatic system elements and identifies the parameters required for detailed specification development. This Information Report, originally converted from an aerospace Hydrospace Information Report (HIR 1559), is tailored for marine surface craft, air…

Bearing and bushing alloys play a critical role in the reliability and efficiency of internal combustion engines. Selecting the right alloy for crankshaft bearings requires balancing several competing properties—fatigue strength, compatibility, dirt embeddability, cavitation erosion resistance, corrosion resistance, and wear…