Objective
More efficient engines for automobiles are now needed to reduce the greenhouse effect by emitting less CO2. Among the available technologies, two-stroke engines offer good overall efficiency. However, they tend to cause higher NOx and emit more unburnt hydrocarbons. To control these pollutant emissions, there must be a good internal sealing system and effective control of the scavenging flow.
The objective of this project is to develop the technology of high power two-stroke engines, with proper sealing and scavenging flow control. High efficiency will be obtained by the blower working "just in time" with the piston cycle at a low pressure level. "Cross stuffing" on the three cylinder engine exhaust-manifold will be used for supercharging.
The project deliverables will be a one-cylinder engine prototype and a simulation model for the scavenging flow.
The scavenging flow will be visualized and optimized by measuring the scavenging and trapping efficiency on a single cycle test rig. The results shall be taken as input for a simulation computer programme of the overall engine, so that the engine timing and the geometry design can be determined.
The development of rotary inlet-valve sealing elements will be achieved by experiments and by FE calculations. If a good scavenging flow and a sufficient sealing function is obtained, a uniflow one-cylinder engine with integrated blower function will be tested.
Besides external mixture preparation, two sorts of inner mixture preparation are assigned: air-blast and liquid-only injection. The control of the burning process and of the secondary emissions will complete the experiments on the one-cylinder engine. All these results shall be transferred to concept a vehicle-suitable three-cylinder engine.
The scavenging experiments on the single cycle test rig, as well as the simulation computer programme and the air-blast injection adaptation, will be conducted by The Queen's University of Belfast. All other tasks will be done by BMW Technik GmbH and its subcontractors.
It is expected that construction criteria can be established for promising designs and design rules of a multi-cylinder engine.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- natural sciences chemical sciences organic chemistry hydrocarbons
- natural sciences physical sciences classical mechanics fluid mechanics fluid dynamics
- natural sciences mathematics pure mathematics geometry
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Programme(s)
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Coordinator
80788 MUENCHEN
Germany
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.