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Four Stroke Engine
A four-stroke (also four-cycle) engine is an internal combustion (IC) engine in which the piston completes four separate strokes while turning the crankshaft. A stroke refers to the full travel of the piston along the cylinder, in either direction. The four separate strokes are termed: #Intake: Also known as induction or suction. This stroke of the piston begins at top dead center (T.D.C.) and ends at bottom dead center (B.D.C.). In this stroke the intake valve must be in the open position while the piston pulls an air-fuel mixture into the cylinder by producing vacuum pressure into the cylinder through its downward motion. The piston is moving down as air is being sucked in by the downward motion against the piston. #Compression: This stroke begins at B.D.C, or just at the end of the suction stroke, and ends at T.D.C. In this stroke the piston compresses the air-fuel mixture in preparation for ignition during the power stroke (below). Both the intake and exhaust valves are close ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philippe Le Bon
Philippe le Bon (or Lebon) (D'Humbersin) (May 29, 1767 – December 1, 1804) was a French engineer, born in Brachay, France. There is much confusion about his life and accomplishments. His main contributions were improvements to steam engines and industrializing the extraction of lighting gas from wood. Following details published in readings for young people, Lebon has long been purported to have been assassinated on the eve of Napoleon's crowning ceremony, at the beginning of December 1804.Fetter, Johann. ''Lehrgang der französischen Sprache'' 211pp (1897). ''(in french)''. Available online aarchive.org p 85: "''Philippe Lebon mourut assassiné, on ne sait par qui, en 1804.''" While the actual time of death seems to be December 1 at 10 am, there are no contemporary evidence to sustain the story: legal documents produced by the Archives Nationales upon the 150th jubilee of Lebon make it clear that neither the engineer's servant, Euphrasie Hubert, nor the justice practitioner c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Power Density
Power density is the amount of power (time rate of energy transfer) per unit volume. In energy transformers including batteries, fuel cells, motors, power supply units etc., power density refers to a volume, where it is often called volume power density, expressed as W/m3. In reciprocating internal combustion engines, power density (power per swept volume or brake horsepower per cubic centimeter) is an important metric, based on the ''internal'' capacity of the engine, not its external size. Examples See also *Surface power density, energy per unit of area *Energy density, energy per unit volume * Specific energy, energy per unit mass * Power-to-weight ratio/specific power, power per unit mass **Specific absorption rate Specific absorption rate (SAR) is a measure of the rate at which energy is absorbed per unit mass by a human body when exposed to a radio frequency (RF) electromagnetic field. It can also refer to absorption of other forms of energy by tissue, inc ... ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James Atkinson (inventor)
James Atkinson (1846 – 1914) of Hampstead was a British engineer who invented several engines with greater efficiency than the Otto cycle. The Atkinson cycle engines were named the "Differential 1882", "Cycle 1887" and "Utilite 1892". The most well-known of Atkinson's engines is the "Cycle 1887", patented in 1887. By use of variable engine strokes from a complex crankshaft, Atkinson was able to increase the efficiency of his engine, at the cost of some power, over traditional Otto-cycle engines. He was awarded the John Scott Medal of The Franklin Institute in 1889. See also *History of the internal combustion engine Various scientists and engineers contributed to the development of internal combustion engines. In 1791, the English inventor John Barber patented a gas turbine. In 1794 Thomas Mead patented a gas engine. Also in 1794 Robert Street patented an i ... Notes Further reading External links James Atkinson at Find A Grave- personal details 1846 births ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
T Cycle AtkinsonMiller
T, or t, is the twentieth letter in the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is ''tee'' (pronounced ), plural ''tees''. It is derived from the Semitic Taw 𐤕 of the Phoenician and Paleo-Hebrew script (Aramaic and Hebrew Taw ת/𐡕/, Syriac Taw ܬ, and Arabic ت Tāʼ) via the Greek letter τ (tau). In English, it is most commonly used to represent the voiceless alveolar plosive, a sound it also denotes in the International Phonetic Alphabet. It is the most commonly used consonant and the second most commonly used letter in English-language texts. History '' Taw'' was the last letter of the Western Semitic and Hebrew alphabets. The sound value of Semitic ''Taw'', Greek alphabet Tαυ (''Tau''), Old Italic and Latin T has remained fairly constant, representing in each of these; and it has also kept its original basic shape in most of these alphabets. Use in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prius2004
The is a car built by Toyota which has a hybrid drivetrain, combining an internal combustion engine with an electric motor. Initially offered as a four-door sedan, it has been produced only as a five-door liftback since 2003. In 2007, the United States Environmental Protection Agency (EPA) and California Air Resources Board (CARB) rated the Prius as among the cleanest vehicles sold in the United States on the basis of smog-forming emissions. The 2018 model year Prius Eco ranked as the second-most-fuel-efficient gasoline-powered car without plug-in capability available in the US that year, following the Hyundai Ioniq Blue hybrid. The Prius first went on sale in Japan in 1997, and was available at all four Toyota Japan dealership chains, making it the first mass-produced hybrid vehicle. It was subsequently introduced worldwide in 2000. Toyota sells the Prius in over 90 markets, with Japan and the United States being its largest markets. Global cumulative Prius liftback s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
