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Club Saga Iswara 永恒的车队(4周年纪念庆祝大会6月6号)q^_^p
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发表于 26-5-2009 08:40 AM
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发表于 26-5-2009 10:43 AM
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原帖由 69-GT-sap 于 26-5-2009 08:40 发表 
我想问head是什么东西??
哦~
Cylinder head 的中文意思是 : 汽缸頭 或 引擎的上半座 (我们常说是 Head)
汽缸頭又稱為引擎的上半座,座落於汽缸床之上,在頂置汽門設計(OHV)的引擎中,其內部包含了主要的閥機構,如氣門,汽門彈簧,氣門挺桿/搖臂, 而在頂置凸輪軸(SOHC or DOHC)設計的引擎中,又包括了凸輪軸,凸輪齒盤等等。同時也包括了燃燒室。火星塞也安裝於此。汽缸頭跟汽缸床被緊密地鎖在一起,中間夾有汽缸床墊片。
汽缸頭可視為發揮引擎性能的重要關鍵,如進排氣道的流量大小,跟凸輪軸的搭配將密切地影響容積效率。燃燒室的形狀並決定了引擎容不容易爆震的特性,其容積也跟壓縮比息息相關。
Saga 的是 SOHC ,意思是 Single Cam . Cam 在什么地方/?? 就是在 Head 了。
Cylinder head
In an internal combustion engine, the cylinder head sits above the cylinders and consists of a platform containing part of the combustion chamber and the location of the valves and spark plugs. In a flathead engine, the mechanical parts of the valve train are all contained within the block, and the head is essentially a flat plate of metal bolted to the top of the cylinder bank with a head gasket in between; this simplicity leads to ease of manufacture and repair, and accounts for the flathead engine's early success in production automobiles and continued success in small engines, such as lawnmowers. This design, however, requires the incoming air to flow through a convoluted path, which limits the ability of the engine to perform at higher rpm, leading to the adoption of the overhead valve head design.
In the overhead valve head, the top half of the cylinder head contains the camshaft in an overhead cam engine, or another mechanism (such as rocker arms and pushrods) to transfer rotational mechanics from the crankshaft to linear mechanics to operate the valves (pushrod engines perform this conversion at the camshaft lower in the engine and use a rod to push a rocker arm that acts on the valve). Internally the cylinder head has passages called ports for the fuel/air mixture to travel to the inlet valves from the intake manifold, for exhaust gases to travel from the exhaust valves to the exhaust manifold, and for antifreeze to cool the head and engine.
The number of cylinder heads in an engine is a function of the engine configuration. A straight engine has only one cylinder head. A V engine usually has two cylinder heads, one at each end of the V, although Volkswagen, for instance, produces a V6 called the VR6, where the angle between the cylinder banks is so narrow that it utilizes a single head. A boxer engine has two heads.
The cylinder head is key to the performance of the internal combustion engine, as the shape of the combustion chamber, inlet passages and ports (and to a lesser extent the exhaust) determines a major portion of the volumetric efficiency and compression ratio of the engine.
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发表于 26-5-2009 10:45 AM
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http://i144.photobucket.com/albums/r185/jamesc03/220720081006.jpg
以上的是,我的Head . 4g13p 的。。 |
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发表于 26-5-2009 10:47 AM
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我是新人.最快160极限..........车已经去不到了 |
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发表于 26-5-2009 10:47 AM
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以上的是,我的Head . 4g13p 的。。 |
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发表于 26-5-2009 10:49 AM
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发表于 26-5-2009 11:06 AM
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发表于 26-5-2009 11:47 AM
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原帖由 占姆士 于 26-5-2009 04:56 AM 发表 
Swift Sport 不错的选择 ~ ~
1.6 L
Naturally Aspirated DOHC VVT 4-cylinder with a 11.1:1 compression ratio, 4-2-1 exhaust manifold, High lift cams, Forged pistons, and strengthened valve s ...
swift sport太贵了。。。现在要100k左右噢。。。
人家new jazz 1.5L都120hp了。。。哪里有得跑。。。 |
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发表于 26-5-2009 12:57 PM
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发表于 26-5-2009 12:59 PM
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发表于 26-5-2009 02:16 PM
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发表于 26-5-2009 02:18 PM
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发表于 26-5-2009 02:33 PM
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发表于 26-5-2009 02:47 PM
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发表于 26-5-2009 03:18 PM
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发表于 26-5-2009 04:25 PM
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我是不新不舊的會員 |
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发表于 26-5-2009 04:52 PM
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发表于 26-5-2009 07:36 PM
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发表于 26-5-2009 09:43 PM
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发表于 27-5-2009 02:57 AM
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