Zobrazeno 1 - 10
of 18
pro vyhledávání: '"S.J. Howell-Smith"'
Autor:
Jamal Umer, Sashi Balakrishnan, Nicholas J. Morris, Homer Rahnejat, S.J. Howell-Smith, Ramin Rahmani
To extend drain intervals and improve efficiency, new engine oils with increased dispersant concentration and reduced viscosity are required. Low viscosity engine oils can increase the prevalence of boundary friction at low temperature and increase i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::daae39c5dd782db10559ba5ddcaac4f2
Autor:
S.J. Howell-Smith, Nicholas J. Morris, Michael Gore, Paul King, Ramin Rahmani, Homer Rahnejat
Publikováno v:
Lubrication Science. 29:293-316
It is necessary to develop an analytical solution in order to combine predictions with measured tribological parameters and fundamentally understand the mechanism of lubrication in a typical region of engine cycle, using tribometric studies. This pap
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8b944aa80f48242f143b1bc726ef30ac
https://doi.org/10.1002/ls.1369
https://doi.org/10.1002/ls.1369
Publikováno v:
Surface Topography: Metrology and Properties. 8:034001
Wankel rotary engines are used as power units in contemporary machines such as unmanned aerial vehicles and automobile range extenders due to their high-power density. A challenge of the engine architecture is the maintenance of an effective seal aro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0764c3177ab83d7a690c5f7ff370c055
https://doi.org/10.1088/2051-672x/ababf5
https://doi.org/10.1088/2051-672x/ababf5
Autor:
Homer Rahnejat, S.J. Howell-Smith, Ramin Rahmani, Mahdi Mohammadpour, Colin P. Garner, Hamed Shahmohamadi
Publikováno v:
Tribology International. 90:164-174
Prediction of load capacity and friction depends on the assumed boundary conditions. The inlet comprises swirl and counter flows, admitting only a portion of the inward flow into the conjunctional gap. At the contact exit, the lubricant film ruptures
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1f9154125e2262ef302cd51827a67289
https://doi.org/10.1016/j.triboint.2015.04.025
https://doi.org/10.1016/j.triboint.2015.04.025
Publikováno v:
Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering. 228:391-402
Friction constitutes nearly one fifth of all engine losses. The main contributory source of frictional losses in most engines is the piston–cylinder system, accounting for nearly half of all the parasitic losses. Minimisation of this is essential f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f074216af7e638b1e740cdebc219e118
https://doi.org/10.1177/0954407013512626
https://doi.org/10.1177/0954407013512626
Publikováno v:
Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology. 227:154-167
The article proposes a mathematical model, which predicts the frictional performance of an internal combustion engine compression ring in the vicinity of the top dead center region. It accounts for the blow-by induced inter-ring pressures drop and fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6428777ae4c423274068d31b828c1a69
https://doi.org/10.1177/1350650112461579
https://doi.org/10.1177/1350650112461579
Publikováno v:
Journal of Tribology. 138
Minimization of parasitic losses in the internal combustion (IC) engine is essential for improved fuel efficiency and reduced emissions. Surface texturing has emerged as a method palliating these losses in instances where thin lubricant films lead to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::019251dfafd76cedf6428ce0e3a9c0d5
https://doi.org/10.1115/1.4031780
https://doi.org/10.1115/1.4031780
Autor:
Ramin Rahmani, Homer Rahnejat, M. De la Cruz, Michael Leighton, S.J. Howell-Smith, Nicholas J. Morris
Reciprocating and low-speed sliding contacts can experience increased friction because of solid boundary interactions. Use of surface texturing has been shown to mitigate undue boundary friction and improve energy efficiency. A combined numerical and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bafd7a2c054edbb5bda1a0538f5a8f42
Publikováno v:
Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering. 220:1309-1318
The paper describes the importance of reducing frictional losses in internal combustion (IC) engines, thereby improving engine efficiency. One of the main sources contributing significantly to engine friction is the interaction between the piston com
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fd3e676d2b4d72f38334f9520dab1ff8
https://doi.org/10.1243/09544070jauto282
https://doi.org/10.1243/09544070jauto282
Publikováno v:
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science. 219:1235-1247
The article presents detailed analysis of the conforming contact between a piston and cylinder liner in a high-speed racing engine under extreme operating conditions owing to high loads and operating speeds in excess of 19 000 r/min, resulting in a h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0b2f2da84a75f7561bc2349b007d122c
https://doi.org/10.1243/095440605x32147
https://doi.org/10.1243/095440605x32147