Off-highway Engineering - February 2015

Overview

The February 2015 issue of SAE Off-Highway Engineering presents a comprehensive exploration of advancements in off-highway vehicle technologies, focusing on powertrain innovations, diagnostic challenges, and manufacturing trends. This edition highlights the Caterpillar D7E dozer, which stands out due to its innovative diesel-electric powertrain, offering up to 30% better fuel efficiency and 10% more production compared to its predecessor, the D7R2. This dozer exemplifies the shift towards more efficient and environmentally friendly machinery in the construction and mining sectors.

The issue opens with an editorial discussing the significance of combustion technology in modern engineering, emphasizing the ongoing relevance of internal combustion engines despite the rise of alternative power sources. The internal combustion engine remains a reliable and cost-effective solution for power conversion, with various engine architectures being explored to enhance performance and efficiency.

A key feature of this issue is the article on rotary spark-ignition/compression-ignition (SI/CI) combustion engines, which examines their potential future in the industry. The article discusses the historical context of piston engines and the exploration of alternative engine designs that could offer improved efficiency and reduced emissions.

In the realm of diagnostics, the magazine addresses the challenges faced by design teams in diagnosing engine and aftertreatment systems over the long lifetimes of vehicles. As emissions regulations become stricter, the need for effective diagnostic tools and techniques is paramount. The article suggests that innovative approaches are necessary to ensure that these systems remain functional and compliant throughout their operational life.

The issue also features a segment on noise, vibration, and harshness (NVH) reduction techniques. It highlights the importance of enhancing durability through changes in polymer composition, manufacturing methods, and design optimization of powertrain mounts for off-highway vehicles. This focus on NVH is crucial for improving operator comfort and vehicle performance, particularly in demanding off-highway environments.

In addition to these technical discussions, the magazine includes updates on various products and technologies relevant to the off-highway sector. For instance, Rexroth has released a new flow-sharing valve designed for mini excavators, which promises to enhance hydraulic efficiency and performance. This innovation reflects the ongoing trend towards more sophisticated hydraulic systems that can improve the functionality of compact machinery.

The magazine also covers the collaboration between Argonne National Laboratory, Convergent Science, and Cummins, which aims to simulate fuel injectors for improved engine performance. This partnership underscores the importance of advanced modeling and simulation techniques in optimizing engine design and operation.

Furthermore, the issue provides insights into flexible and "invisible" assembly lines that are gaining popularity in manufacturing. These assembly lines utilize advanced technologies to streamline production processes, reduce waste, and enhance overall efficiency. The trend towards more adaptable manufacturing systems is indicative of the industry's response to changing market demands and the need for greater customization in vehicle production.

The publication concludes with a look at upcoming events and features, including technology eNewsletters and print magazines that will cover a range of topics from aerospace to automotive engineering. This forward-looking perspective emphasizes the continuous evolution of engineering practices and the importance of staying informed about the latest developments in the field.

Overall, the February 2015 issue of SAE Off-Highway Engineering serves as a valuable resource for professionals in the off-highway sector, providing insights into the latest technological advancements, industry challenges, and future trends. The focus on powertrain innovations, diagnostic solutions, and manufacturing efficiencies reflects the ongoing commitment to improving the performance and sustainability of off-highway vehicles.