Diesel engine timing locating method

Abstract

The invention discloses a diesel engine timing locating method. The phase relation among an engine cam shaft, a crankshaft and a first cylinder is measured in advance, three locating pin holes are designed, and timing location is completed through the following four steps that the crankshaft and a flywheel are located through a first pin; a second pin penetrates through a cam shaft gear and is inserted into a second locating pin hole in a gear chamber; a third locating pin penetrates through a flywheel shell and is inserted into a third locating pin hole in the flywheel through the rear end of the engine, so that the cam shaft and the crankshaft opposite to the cam shaft in position are fixed on the upper dead center of the first cylinder; a crankshaft gear and an idler gear are installed, and meshing marks are arranged among the idler gear, the crankshaft gear and the cam shaft gear. According to the diesel engine timing locating method, timing location is very easy and convenient, operation is easy, and errors of determination of the upper dead center of the first cylinder caused by manual timing are avoided. By means of matching between the locating pins and the pin holes, the step that common gear assembly needs alignment of the meshing marks is omitted, the assembly process is simplified, production efficiency is improved, and the application effect is very good.

Description

technical field [0001] The invention belongs to engine structure technology, and in particular relates to a timing positioning system for diesel engine assembly and maintenance. Background technique [0002] With the continuous improvement of engine technology and the strict requirements of society for environmental protection, domestic and foreign automobile manufacturing industries have higher and higher requirements for the power, economy and emission of engines, which requires continuous improvement of engine processing and assembly. level etc. In order to reduce particulate matter emissions and improve engine efficiency, most diesel engines currently use high-pressure common rail technology. This technology first requires accurate timing and positioning of the engine during assembly, so as to adapt to the precise control of the fuel injection time and fuel injection of the injector by the electronic control unit. Quantity, and valve timing control the intake and exhaus...

AI Technical Summary

Problems solved by technology

The timing positioning accuracy of this method is not high, and there are human measurement errors. In addition, when assembling the transmission gears, the timing marks of each gear need to be matched and assembled, which seriously affects the assembly cycle and production efficiency.

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