Results 81 to 90 of about 102,186 (212)
ActuatorsThe variable valve mechanism, as a critical component for the efficient and low-carbon development of internal combustion engines, faces increasingly stringent requirements regarding its driving efficiency, output force, precision, and energy consumption.
Xinyu Fan +4 more
doaj +1 more source
Development of a High-Performance Choke Valve with Reference to Sizing for Multiphase Flow
Measurement + Control, 1991 The paper describes events leading up to the development of a variable choke valve for high-pressure drop service on multiphase fluids. During the evolvement of the design, which has now been proved in service, it was found necessary to discard some of ...
E W Singleton
doaj +1 more source
Valve Corporation: Strategy Tipping Points and Thresholds [PDF]
, 2015 Valve Corporation represents an intriguing case study of flat structure and self organization (Puranam & Håkonsson, 2015; Valve, 2012). The structures and practices of Valve of course are not new.
Felin, Teppo
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Development and Application of Self-locking Fracturing Circulating Valve
Shiyou jixie, 2015 The low opening pressure of the existing fracturing circulating valve in Zhongyuan Oilfield often lead to premature opening due to imbalanced tubing and casing pressure,pressure impulse and misoperation,thereby result in delayed schedule and rework.To ...
Xu Xinhua +4 more
doaj
Investigation of CAI/SI operations ina a four-cylinder direct injection gasoline engine [PDF]
, 2006 This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.A four-cylinder, four-stroke, gasoline engine with direct injection fuel was commissioned and used to achieve CAI combustion. CAI combustion was achieved by
Kalian, Navin
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Design criteria for the trileaflet mechanical heart valve [PDF]
, 2010 碩士本研究的目的是設計出一個理想的人工心瓣。雖然人工心瓣發展已經超過半個世紀，但目前臨床上所使用的機械心瓣還是存在血栓與溶血等缺點，而生物心瓣卻有不耐用的問題。本文利用分析各種三葉片機械心瓣的專利和相關文獻，進而提出全新的改良設計。新設計的葉片與環座是完全以自由曲面所建構而成，外形平順完整而沒有突出的支架，具有圓滑的轉軸，使葉片能夠靈活地轉動。 然後以鈦合金製作實驗原型，提供實驗團隊進行體外流場實驗分析，以驗證新設計的流場性能表現與發展可行性。然後根據新設計的概念，提出美國專利申請 ...
黃仁宏; Huang, Ren-hong
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Design of integrated breather valve cover for large power engines [PDF]
, 2011 Tier 4 Emission control versus conventional engine design is what every design engineer's challenge to be dealt with. To design an engine to current market standards and requirements has become very intricate.
Sudhakar Nandam
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Experimental studies of CAI combustion in a four-stroke GDI engine with an air-assisted injector [PDF]
, 2007 This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.CAI combustion and the factors affecting it were intensively investigated in a single cylinder, air-assisted gasoline direct injection engine.
Brouzos, Nikolaos P
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Development of an experimental diaphragm valve used for velocity profiling of such devices [PDF]
, 2010 Published ArticleThe design, manufacture and use of diaphragm valves in the minerals industry is becoming increasingly important since this sector is restricted from using excessive amounts of water for their operations.
Humphreys, P. +6 more
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The closing dynamics of a new trileaflet heart valve [PDF]
, 2010 碩士目前臨床使用的人工機械心瓣可能會導致穴蝕的發生，造成心瓣本身與血球的破壞，並可能導致溶血與血栓的生成。穴蝕現象主要在葉片關閉的瞬間產生，因此與心瓣的關閉機制有很大的關聯。由於目前仍未有完美的人工心瓣，因此新型人工心瓣的設計與開發仍在不斷進行中。本研究針對穴蝕現象的生成，利用本實驗室所研發的新型三葉片機械心瓣與臨床上使用廣泛之St. Jude Medical雙葉片機械心瓣及Medtronic-Hall Standard 單葉片心瓣在體外模擬測試台中進行測試。實驗結果指出在葉片關閉速度、最大負壓(NPP)
陳孝杰; Chen, Hsiao-chien
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