Preliminary explorations of the performance of a novel small scale opposed rotary piston engine

With the increasing pressure of fossil fuel consumption and pollutions from vehicles powered by internal combustion engines, much attention has been attracted for hybrid and electric vehicles. With this background, an increasing demand for compact and high power density engines is being developed fo...

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Veröffentlicht in:Energy (Oxford) 2020-01, Vol.190, p.116402, Article 116402
Hauptverfasser: Gao, Jianbing, Tian, Guohong, Jenner, Phil, Burgess, Max, Emhardt, Simon
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container_title Energy (Oxford)
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creator Gao, Jianbing
Tian, Guohong
Jenner, Phil
Burgess, Max
Emhardt, Simon
description With the increasing pressure of fossil fuel consumption and pollutions from vehicles powered by internal combustion engines, much attention has been attracted for hybrid and electric vehicles. With this background, an increasing demand for compact and high power density engines is being developed for the purpose of hybrid vehicles. In this paper, the design of a novel opposed rotary piston engine was investigated. In comparison with conventional reciprocating engines, this design has no crank connecting rods and intake/exhaust valves, and the operation cycle takes 360° crank angle to complete but similar to a four stroke cycle. 3D and 1D simulations were conducted to analyse the in-cylinder flow and evaluate the engine performance. The simulation results indicated the air velocity was very high at the end of intake stroke due to the lack of intake valves. The opposed rotary piston engine had a higher fraction of constant volumetric combustion that yielded to less heat loss, which contributed to a higher power output per combustion cycle than a reciprocating engine at low engine speed. The estimated minimum brake specific fuel consumption and maximum power density were 240 g/(kW·h) and approximately 80 kW/L, respectively. •The novel engine significantly simplified the intake structures.•The engine operation covered four power strokes in one shaft rotation.•Each stroke lasted 120° geometric angle during engine operation.•The maximum power output density was ∼80 kW/L around 5000 rpm.
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source ScienceDirect Journals (5 years ago - present)
subjects Automobile industry
Charging efficiency
Combustion
Connecting rods
Cylinders
Electric vehicles
Engine valves
Engines
Exhaust
Fossil fuels
Fuel consumption
Heat loss
Hybrid vehicles
In-cylinder flow characteristics
Internal combustion engines
Maximum power density
Opposed rotary piston
Performance evaluation
Piston engines
Power consumption
Power output estimation
Product design
Spark ignition engine
Valves
title Preliminary explorations of the performance of a novel small scale opposed rotary piston engine
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