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Potential of Multiple Injection Strategy for Low Emission Diesel Engines
Technical Paper
2002-01-1150
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A PC-programmable electronic control unit (PECU), able to manage both conventional and future electronic injection systems to make a fixed number of consecutive injections (1 to 5 or more) controlling the injection pressure and the injection pulses duration as well as the separation time or dwell in between was used to study the behaviour of a Bosch common rail injection system both on dynamic spray bench and on engine test bench. The PECU allowed a reduction in the dwell time between consecutive injection pulses from the current value of 1800 μs to 500 μs.
Photographic sequences of a five holes mini-sac nozzle making five consecutive injections at 400 - 800 and 1200 bar respectively were taken at ambient pressure and temperature. They showed that both spray penetration and cone angle at all operative conditions are very uniform and stable.
Preliminary engine tests carried out on a small DI diesel engine have shown that multiple injections contributes to a reduction in the peak heat release and the NOx and smoke exhaust emissions
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Authors
Citation
Corcione, F., Vaglieco, B., Corcione, G., and Lavorgna, M., "Potential of Multiple Injection Strategy for Low Emission Diesel Engines," SAE Technical Paper 2002-01-1150, 2002, https://doi.org/10.4271/2002-01-1150.Also In
Electronic Engine Controls 2002: Engine Control, Neural Networks and Non-Linear Systems
Number: SP-1689; Published: 2002-03-04
Number: SP-1689; Published: 2002-03-04
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