Abstract
The paper reports on the process of modelling a high-pressure common rail pump designed to supply a two-stroke compression-ignition engine, which includes the presentation of methodology for model construction and results of simulation tests. A one-dimensional model of the pump was developed in the AVL Hydsim environment. A single-section positive displacement pump driven by a double cam was used for modelling. The developed model enables simulation of pump operation in various conditions defined by shaft speed, pumping pressure, settings of pump executive elements as well as fuel properties. The obtained results were compared with the results of bench tests and theoretical calculations. The analysis included the flow rate fuel overflow and changes in pumping pressure depending on the fuel dispenser settings. The model will also be used to build a complete fuel supply system model consisting of an injector model, a rail model and a control system model. The research is carried out with a view to optimising individual components and the operation of the entire supply system, taking into account the regulation of pumping pressure and synchronisation of the pumping process with fuel injection cycles.
Highlights
Increasing requirements to reduce exhaust emissions and fuel consumption while not compromising the power factor is currently becoming widely applicable to internal combustion engines intended for aircraft applications
The paper [1] discusses the parameters of about 40 types of aircraft diesel engines
It is necessary to develop a new combustion chamber and a power supply system cooperating with this chamber
Summary
Increasing requirements to reduce exhaust emissions and fuel consumption while not compromising the power factor is currently becoming widely applicable to internal combustion engines intended for aircraft applications. Intensive research works are underway to develop a diesel-powered unit for aircraft propulsion. Due to a number of advantages, such as: lack of the head (lower heat loss) and timing system, opposite movement of pistons conducive to balancing the engine, development and modernisation of the compression-ignition engine operating in a two-stroke cycle and opposing pistons, the design was subjected to development and modernisation [2, 3, 4]. It is necessary to develop a new combustion chamber and a power supply system cooperating with this chamber
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