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Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Jennifer Topinka.
Archive | 2007
Lembit Salasoo; Jennifer Topinka
Studies of nozzle flow area, the interaction of fuel injector geometry with nozzle geometry, and injector needle raise and fall rates were performed.
Archive | 2007
Lembit Salasoo; Jennifer Topinka
Nozzle optimization for a new piston bowl design is reported, covering several geometrical features. The influence of fuel sulfur level on PM emissions was investigated.
Archive | 2006
Lembit Salasoo; Jennifer Topinka
Upgrades and calibrations were performed on the single cylinder engine. Production of a baseline engine performance dataset has started using GE Evolution engine hardware, including the production unit pump fuel system. Long-term tests of battery cells energized at room temperature were performed. Hybrid energy storage capabilities were added to the fuel optimizer.
Archive | 2006
Lembit Salasoo; Jennifer Topinka; Paul Houpt
The fuel injection hardware on the single cylinder research engine was upgraded and performance trends were quantified. The effects of fuel injection rate shapes were studied. Long-term cycling of subscale battery cell assemblies has identified aging trends. Follow-up vibration testing of an instrumented COTS battery was performed. Optimal trip planning algorithms were implemented and demonstrated in the interactive, real-time simulation environment.
Archive | 2006
Lembit Salasoo; Jennifer Topinka
High pressure common rail (HPCR) fuel injection performance testing developed a notch-by-notch performance comparison between HPCR and the production fuel system. A multiple injection screening study at notch 8 was completed with the baseline HPCR fuel injector nozzle tip design. Began a study on performance effects of different nozzle tip geometries. The hybrid locomotive battery vendor performed component fabrication tests and began manufacture of a mockup battery to validate the vibration design performance.
Archive | 2006
Lembit Salasoo; Jennifer Topinka
Baseline single cylinder engine testing with unit fuel pump system has been completed. This will support subsequent development of high pressure common rail fuel injection. The hybrid battery vendor is preparing an instrumented battery with improved vibration design.
Archive | 2006
Lembit Salasoo; Jennifer Topinka; Paul Houpt
Advanced fuel injection experimental results on a single cylinder engine operating at part load show the path to NOx vs SFC tradeoffs. Hybrid battery vibration tests have been performed. Analysis of advanced Battery Management System field validation results showed effective SOC estimation. A fuel optimizer simulation lab has been completed.
Archive | 2006
Lembit Salasoo; Jennifer Topinka; Paul Houpt
A unit pump system was installed on the single cylinder engine. The performance entitlement of the high-pressure common rail system at notch 4 and notch 8 was determined, and data was also compared with a production design multi-cylinder engine. Vibration testing of a hybrid-bus-design battery revealed extensive insulation wear. The vendor initiated design activities to address vibration. A cell-level test program was initiated to study battery current flow at room temperature and develop limits. The robustness and sub-optimal simplified implementation of fuel optimization algorithms was studied.
Archive | 2005
Lembit Salasoo; Paul Houpt; Jennifer Topinka; Anthony Furman
Locomotive-scale single cylinder engine with common rail fuel injection data was gathered to explore the fuel consumption and particulate matter emissions entitlement. A structured experiment on thermal spray application of polymer based compressor abradables was begun. Turbine performance improvements were found due to metallic abradables coatings. Hybrid energy storage battery ripple current and long-term cycling tests have been performed. Final track test of advanced energy management system was performed. Fuel optimization computational methods have been enhanced, and a prototype real-time graphic interface developed.
Archive | 2005
Lembit Salasoo; Jennifer Topinka; Anthony Furman; Raj Bharadwaj
Completed high pressure common rail system performance mapping at notch 8 to establish advanced fuel injection fuel savings entitlement. Investigated performance differences of several abradable coatings between full-scale tests and rub test coupons using post-run micrographic analysis. Demonstrated implementation of advanced energy management controls on hybrid locomotive. Began advanced energy storage detailed design; continued life-cycle subscale energy storage testing. Formulated trip optimization problem with hybrid locomotive, and evaluated first implementation to produce an optimal driving plan.
