Engine air distributing timing assembly method
An assembly method and engine technology, which is applied to engine components, machines/engines, valve devices, etc., can solve the problems of complex assembly process and low timing positioning accuracy, and achieve the effect of simple operation and guaranteed accuracy
Inactive Publication Date: 2014-03-12
ZHEJIANG GEELY HOLDING (GROUP) CO LTD +1
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Problems solved by technology
The assembly process of the marking positioning method is simple and the assembly efficiency is high, but the timing positioning accuracy is affected by the length accuracy of the chain (or synchronous belt), the position of the guide rail (or idler wheel) and the excessively long dimensional chain, and the timing positioning accuracy is too low
Although the tooling positioning method is simple in principle and has high timing positioning accuracy, its assembly process is more complicated.
Method used
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[0026] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.
[0027] The correct assembly of the engine valve timing is an important guarantee for the smooth operation of the engine, such as figure 1 Shown is a schematic structural diagram of a typical timing belt drive mechanism, figure 2 Shown is a schematic diagram of the structure of a typical timing chain drive system. figure 1 The timing belt transmission mechanism of the engine shown includes a crankshaft pulley 101, an eccentric idler pulley 201, a first camshaft pulley 301, a second camshaft pulley 401, a tension pulley 501 and a timing belt 601; figure 2 The illustrated engine timing chain drive system includes crankshaft sprocket 102 , adjustable rail 202 , first camshaft sprocket 302 , second camshaft sprocket 402 , tensioning rail 502 , chain tensioner 602 and chain 702 . Among them, the crankshaft pulley 101 and the crankshaft sprocket 1...
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The invention provides an engine air distributing timing assembly method, and belongs to the technical field of an automobile engine. According to the engine air distributing timing assembly method, firstly, a timing tooling positioning mode is adopted for fixing a crank shaft and cam shafts, then, a marking positioning mode is adopted for positioning the cam shafts, finally, a timing tooling is taken out, and the engine air distributing timing assembly is completed. The engine air distributing timing assembly method provided by the invention has the advantages that the tooling is adopted for positioning in front of the cam shafts and the crank shaft, the influence of the length precision of a chain or a synchronous belt as well as the position degree and the profile tolerance of an adjustable rail or an eccentric idle wheel on the timing precision is eliminated, the mark positioning is adopted between the cam shafts, the operation is simple, and in addition, the precision is also ensured.
Description
technical field [0001] The invention belongs to the technical field of automobile engines and relates to an engine assembly method. Background technique [0002] In the prior art, there are mainly two ways to assemble the valve timing of the engine, which are marking positioning mode and tooling positioning mode. The mark positioning method is to calculate the assembly position on the crankshaft timing sprocket (or pulley), camshaft sprocket (or pulley) and chain (or timing belt), mark it, and then assemble according to the mark. The tool positioning method is to fix the crankshaft and camshaft with the timing tool first, and then install other components. The assembly process of the marking positioning method is simple and the assembly efficiency is high, but the timing positioning accuracy is affected by the length accuracy of the chain (or timing belt), the position of the guide rail (or idler wheel) and the excessively long dimensional chain, and the timing positioning ...
Claims
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IPC IPC(8): F01L1/348
Inventor 朱小春徐友刘岩沈源由毅吴成明冯擎峰
Owner ZHEJIANG GEELY HOLDING (GROUP) CO LTD