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Abe-Star
The Abe-Star was a Japanese motorcycle built between 1951 and 1958. The top model was a 148cc four-stroke engine with the company's own overhead valve An overhead valve (OHV) engine, sometimes called a ''pushrod engine'', is a piston engine whose valves are located in the cylinder head above the combustion chamber. This contrasts with earlier flathead engines, where the valves were located be ... engine.Erwin Tragatsch, Ash, Kevin. ''The New Illustrated Encyclopedia of Motorcycles'', Quantum Publishing, London, 2000 References External links Photo Motorcycle manufacturers of Japan {{Motorcycle-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Motorcycle
A motorcycle (motorbike, bike, or trike (if three-wheeled)) is a two or three-wheeled motor vehicle steered by a handlebar. Motorcycle design varies greatly to suit a range of different purposes: long-distance travel, commuting, cruising, sport (including racing), and off-road riding. Motorcycling is riding a motorcycle and being involved in other related social activity such as joining a motorcycle club and attending motorcycle rallies. The 1885 Daimler Reitwagen made by Gottlieb Daimler and Wilhelm Maybach in Germany was the first internal combustion, petroleum-fueled motorcycle. In 1894, Hildebrand & Wolfmüller became the first series production motorcycle. Globally, motorcycles are comparably popular to cars as a method of transport. In 2021, approximately 58.6 million new motorcycles were sold around the world, fewer than the 66.7 million cars sold over the same period. In 2014, the three top motorcycle producers globally by volume were Honda (28%), Yamaha (17 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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] |
Overhead Valve
An overhead valve (OHV) engine, sometimes called a ''pushrod engine'', is a piston engine whose valves are located in the cylinder head above the combustion chamber. This contrasts with earlier flathead engines, where the valves were located below the combustion chamber in the engine block. Although an overhead camshaft (OHC) engine also has overhead valves, the common usage of the term "overhead valve engine" is limited to engines where the camshaft is located in the engine block. In these traditional OHV engines, the motion of the camshaft is transferred using pushrods (hence the term "pushrod engine") and rocker arms to operate the valves at the top of the engine. Some early intake-over-exhaust engines used a hybrid design combining elements of both side-valves and overhead valves. History Predecessors The first internal combustion engines were based on steam engines and therefore used slide valves. This was the case for the first Otto engine, which was first succ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kevin Ash
Kevin Ash (10 December 1959 – 22 January 2013) was a British motorcycle journalist and author, who contributed to ''The Daily Telegraph'' and to ''Motor Cycle News''. Covering technical as well as topical issues, Ash was described as "one of the key figures of the British motorcycle scene", "one of the world's leading motorcycle journalists", and "the doyen of motorcycle correspondents." Personal life Ash was born in Ilford, a town in north-east London, part of Greater London administrative area. He attended Ipswich School, then studied engineering at Imperial College. In 1990, he married Caroline Quanjer, of the Netherlands, with whom he had three daughters: Laurien, Kirsten and Ingrid, who were 20, 18 and 10 at the time of his death. Career Before becoming a journalist, Ash was a motorcycle courier. He also participated in sidecar racing. In 1991, he was a founding contributor at the magazine ''Fast Bikes''. He then joined ''Motor Cycle News'' (''MCN'') as a road teste ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
