Physical Address
304 North Cardinal St.
Dorchester Center, MA 02124
For engineers and designers working with helical springs, a clear understanding of terminology and manufacturing processes is essential for creating reliable specifications and achieving desired performance. SAE J1121, “Helical Compression and Extension Spring Terminology,” provides a foundation for communication between…
Engine cooling fans in heavy-duty vehicles are increasingly shifting from traditional metallic designs to advanced nonmetallic materials. SAE J1474-2012 provided critical information on material selection, manufacturing techniques, and validation testing for these fans. Although the standard was cancelled in 2012…
Ensuring that diagnostic communication between scan tools and heavy-duty vehicle ECUs meets rigorous regulatory requirements is essential for on-board diagnostics (OBD) compliance. The SAE J1939-84-2023 standard provides a comprehensive, structured test framework to verify that SAE J1939 diagnostic message exchanges—over…
The Heavy-Duty OBD IUMPR Data Collection Tool Process, defined by SAE Information Report J3162 (2024), provides a standardized software approach for collecting In-Use Monitor Performance Ratio (IUMPR) data from heavy-duty (HD) vehicles. This tool is essential for meeting the requirements…
As heavy-duty trucks and buses transition from purely mechanical linkages to sophisticated electronic “drive-by-wire” systems, the need for clear prioritization of operator control inputs becomes critical. SAE J3081-2020 provides criteria and rationale for resolving conflicting control requests to maintain vehicle…
This article provides a practical overview of SAE J2728-1-2020, which defines a minimum set of data elements and heavy vehicle–specific triggers for event data recording. Engineers designing or integrating HVEDR systems will find guidance on trigger configurations, data formatting, and…
⚠️ Important Notice: SAE J2244/2 was cancelled in December 2007 and superseded by ISO 6149-2. For new designs, refer to the current ISO standard. This article is provided for reference and compatibility assessment with existing systems. 1. Scope and Standard…
SAE J1498-2017 provides standardized procedures for determining the heat of combustion (heating value) of fuels used in automotive engines. This guide summarizes key aspects for engineers working with fuel calorimetry, unit conversions, and blended fuel calculations. 🛠️ Engineering Insight: Heating…
Scope and Performance Requirements SAE J2695-2005, developed cooperatively by SAE, ASTM, and NLGI, is a recommended practice that aids engineers in designing heavy duty vehicle components and selecting appropriate greases. The standard defines a lubricating grease as a solid to…
The SAE J2425 recommended practice provides a comprehensive laboratory test procedure and requirements for evaluating heavy-truck steering control systems. Revised in 2021, this standard incorporates acceptance criteria from FMVSS 203 and CMVSR 203, adding a critical quasi-static force requirement that…