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A Modern HD-Diesel Engine with Rapeseed Oil, DPF and SCR
Technical Paper
2008-01-1382
ISSN: 0148-7191, e-ISSN: 2688-3627
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Abstract
A modern HD-Diesel engine for construction machines, Liebherr D 934L (120kW) was set-up for a monofuel operation with crude, cold pressed rapeseed oil (ROR)*). The engine was equipped with a supplementary fuel filtration, supplementary engine & fuel heating for cold start and an appropriate fuel temperature control for the engine operation. A special lube oil was applied.
After an extensive basic research of emissions including nanoparticles and energy consumption some adaptations of engine setting were performed:
- modification of the camshaft to eliminate the internal EGR (same valve timing and lift),
- earlier start of injection (SOI) at high- and full load,
- application of a combined exhaust gas aftertreatment system DPF+SCR,
- testing of DPF+SCR according to the VERT quality verification procedure.
It can be stated that:
- there is a very good startability with the auxiliary heating,
- with the earlier setting of SOI there is a lower specific energy consumption and the higher NOx are converted by the SCR,
- the maximum injection pressure of the camdriven unit pumps system (up to 1600 bar at nominal power) does not attain prohibitive values for the durability limits,
- with an urea-consumption of 1l/h there is a deNOx-efficiency of 94%,
- filtration efficiency of the used DPF is up to 97% for mass and up to 99.97% for counts,
- the emissions values of the installation fulfil the LRV - Swiss Clean Air Regulation for stationary applications.
With a care for continuous ROR-Quality and with an appropriate maintenance and inspection the working team believes to be successful in the long term service.
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Czerwinski, J., Zimmerli, Y., Meyer, M., and Kasper, M., "A Modern HD-Diesel Engine with Rapeseed Oil, DPF and SCR," SAE Technical Paper 2008-01-1382, 2008, https://doi.org/10.4271/2008-01-1382.Data Sets - Support Documents
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