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Diesel engine performance and design characteristics are affected by applications. Understanding general performance characteristics and the relationship between engine system design and applications is important for diesel engine system design engineers. This paper is the Part 2 of a series of three companion papers (parts) addressing diesel engine applications (i.e., Part 1 - organization design and systems engineering; Part 2 - general performance characteristics; and Part 3 - operating and design characteristics of different applications). It illustrates important general characteristics with selected examples, and highlights key issues and commonalities of different applications that engine system design engineers need to know. Series design and multi-purpose design are summarized. Four core equations in an engine air system theory are proposed in order to reveal the parametric dependency of pumping-loss-related parameters.

A key strategy to improving the real-world fuel consumption and emissions of medium and heavy duty vehicles is the hybridization of these applications. Unlike the passenger vehicle market, medium and heavy duty applications are typically comprised of a range of components from a variety of manufacturers. The vocational market diversity and size places considerable demand on fuel efficiency and emission compliance. Medium and heavy duty applications have the ability to be successfully hybridized in ways that are not currently, or would not be practical within a passenger vehicle. This would also drive greater truck and bus vertical integration of the hybrid components. However, medium and heavy duty manufacturers have been prevented from certifying a full vehicle level platform due to the current engine only certification requirements.

The two most important issues for diesel engine system engineers to handle engine applications are how to coordinate technical relationships in an organization/team and how to acquire working knowledge of different applications for system integration. This paper is the first part of a series of three inter-related papers (parts) addressing diesel engine applications (i.e., Part 1 - the relationship among applications, engine system design, systems engineering, and organization structure; Part 2 - general performance characteristics of diesel engine applications; and Part 3 - specific or special emissions, operating, and design characteristics of different applications). Specialization, departmentalization, and integration are the three most critical aspects in organization design for engine product development.

Provision of service information in various languages has been a must in the automotive industry. However, in the commercial vehicle industry, it is unclear how manufacturers are managing this daunting task. California Air Resource Board (CARB) 2010 regulations are awakening the commercial vehicle service information managers who are responsible for providing this information according to SAE J2403 terminology. Now is the time to mimic the automotive industry by collaborating on terminology, and in the meantime, begin discussion on how we all manage multiple languages.