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Investigation of VVA-Based Exhaust Management Strategies by Means of a HD Single Cylinder Research Engine and Rapid Prototyping Systems
Abstract:
Heavy-Duty (HD) diesel engines fulfill the current
NOx limits by a sophisticated combination of in-cylinder
technologies and an aftertreatment system. In the face of current
testing cycles with low average load and efficiency/CO₂ demands
measures for the provision of an adequate exhaust temperature
become a development core.
An alternative to common exhaust management strategies could be
variable valve actuation (VVA). Hence a self-developed camless
valve actuation system was implemented on a single-cylinder
research engine to investigate potential strategies. As these
investigations require an appropriate test bench setup the paper
consists of two parts. The first part describes the design process
of the test bench and focuses on the Rapid Prototyping Systems
(RPS) that enabled its operation. The second part discusses the
results of different VVA-based exhaust management strategies and
gives an outlook to further investigations.