Modern vehicles have electronic control units (ECUs) to manage various subsystems, such as the engine, brakes, steering, air conditioning, and infotainment. These ECUs (or simply ‘controllers’) are networked together to share information and output both measured and calculated data directly to one another.
The SAE J1939 in-vehicle network is a data goldmine for improved maintenance, measuring vehicle performance and its subsystems, fleet management, warranty and legal issues, reliability, durability, and accident reconstruction.
The book focuses on guiding the reader in acquiring and correctly interpreting data from the in-vehicle network of heavy-duty (HD) vehicles. The reader will learn how to convert messages into scaled engineering parameters, determine the available parameters on HD vehicles, and assess their accuracy and update rate.
Written by Richard (Rick) P. Walter and Eric P. Walter, two specialists in this field and principals at HEM Data in the United States, the book provides a unique roadmap for data acquisition users. The authors clearly and concisely describe the CAN protocol and review all 19 parts of the SAE International J1939 standard family. Tables, graphs, and examples illuminate relevant standards.
The practical applications covered include calculating fuel economy, analyzing the duty cycle, and capturing intermittent faults. Various diagnostic approaches are compared, including OBD-II, HD-OBD, and Worldwide Harmonized (WWH) OBD.
Data Acquisition from HD Vehicles Using the J1939 CAN Bus is a must-have reference for those interested in effectively acquiring data from SAE J1939-equipped vehicles.
SAE J1939 Starter Kit and Network Simulator
Our JCOM.J1939 Starter Kit and Network Simulator is designed to allow the experienced engineer and the beginner to experiment with SAE J1939 data communication without the need to connect to a real-world J1939 network, i.e., a diesel engine. It may sound obvious, but you need at least two nodes to establish a network. That fact applies especially to CAN/J1939, where the CAN controller shuts down after transmitting data without receiving a response. Therefore, our jCOM.J1939 Starter Kit and Network Simulator consists of two J1939 nodes, namely our jCOM.J1939.USB, an SAE J1939 ECU Simulator Board with USB Port.
The jCOM.J1939.USB gateway board is a high-performance, low-latency vehicle network adapter for SAE J1939 applications. The board supports the full SAE J1939 protocol according to J1939/81 Network Management (Address Claiming) and J1939/21 Transport Protocol (TP).
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