Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/66220
Título: | Native Over-Expanded engine based on a planetary crankshaft with enhanced balancing |
Autor(es): | Capela, Guilherme Costa, Tiago J. Meireles, José F. Martins, Jorge Brito, F.P. |
Data: | 2019 |
Editora: | SAE International |
Revista: | SAE Technical Papers |
Citação: | Capela, G., Costa, T.J., Meireles, J., Martins, J. et al., “Native Over-Expanded Engine Based on a Planetary Crankshaft with Enhanced Balancing,” SAE Technical Paper 2019-01-1194, 2019, doi:10.4271/2019-01-1194. |
Resumo(s): | Over-expansion is one of the promising strategies for improving Internal combustion engine (ICE) efficiency and emissions. It can be implemented by using an unconventional crankshaft. These mechanisms have mass production potential and acceptable friction losses, but also a complex kinematic and dynamic behaviour. This paper proposes such a crank design, a small planetary hypotrochoid over-expanded single cylinder engine - UMotor - and compares it to equivalent conventional ICEs with similar intake or expansion strokes. A suitable crankshaft counter weight geometry was determined in order to minimize the overall reaction forces. The mass balancing studies were conducted via a dynamic motion analysis of the crank drive, including a Fast Fourier Transform (FFT) frequency analysis. For the tested engine speeds, the UMotor average and peak magnitude reaction forces proved to be similar to those generated in the conventional engines for intermediate and high engine speeds. Also, the UMotor displayed fewer high frequency harmonics, indicating a lower structural disturbance of the chassis of a vehicle equipped with one of these engines. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/66220 |
DOI: | 10.4271/2019-01-1194 |
ISSN: | 0148-7191 |
e-ISSN: | 0096-5170 |
Versão da editora: | https://saemobilus.sae.org/content/2019-01-1194/ |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | MEtRICs - Artigos em livros de atas/Papers in proceedings |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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2019-01-1194.pdf Acesso restrito! | 674,74 kB | Adobe PDF | Ver/Abrir |