Pulse oil supply type engine air cylinder block oil passage

Abstract

The invention discloses a pulse oil supply type engine air cylinder block oil passage. According to the structure, the tail end of a main oil passage of an engine air cylinder block is divided into a crankshaft bearing oil supply branch passage and a cam shaft oil supply branch passage, and the cam shaft oil supply branch passage is communicated with a cam shaft bearing hole in the engine air cylinder block; the crankshaft bearing oil supply branch passage is communicated with a crankshaft bearing; a lining is inlaid in the cam shaft bearing hole and provided with oil inlet and outlet holes; a groove is formed in the large-head end of a cam shaft, when the cam shaft rotates to one certain position, the cam shaft oil supply branch passage is communicated with a rocker arm oil supply passage, and at the moment the main oil passage can supply oil to the crank shaft bearing, the cam shaft and a rocker arm at the same time. Oil supply time periods are different through the cam shaft large-head end structure, intermittent oil supply is carried out, and therefore reduction of oil pressure is relieved. While high oil pressure is ensured, enough lubrication oil is supplied to other parts. Due to the fact that the rotating speed of the cam shaft is relatively high, oil can be supplied to the rocker arm one time when the cam shaft rotates a circle, and the pressure of the main oil passage can be kept basically stable.

Description

technical field [0001] The invention belongs to the structural technology of an internal combustion engine, and in particular relates to a pulse oil supply type engine cylinder block oil channel, which can realize intermittent oil supply to the rocker shaft of the engine. Background technique [0002] When the engine is running, all moving parts need to be lubricated and cooled to avoid engine failure due to mechanical wear. The design principle of the lubrication system is to provide an appropriate amount of lubricating oil according to the operating characteristics of the moving parts. For example, the crankshaft, camshaft and other components need more lubricating oil, but the rocker arm on the cylinder head does not need too much lubricating oil. Since the pressure in the lubricating system is the same, if the rocker arm and other parts are continuously supplied with oil, the pressure in the main oil passage of the engine will inevitably be reduced, and the oil supply to...

AI Technical Summary

Problems solved by technology

Since the pressure in the lubricating system is the same, if the oil is continuously supplied to the rocker arm and other components, the pressure in the main oil passage of the engine will be reduced, and the oil supply to the crankshaft and camshaft will inevitably be reduced as a result.

The method of intermittent oil supply is mainly to process a straight hole or a T-shaped hole at the big end of the camshaft to realize pulse oil supply, but this has a great impact on the strength of the camshaft, and at the same time it is more difficult to process, and it also increases the camshaft. shaft manufacturing cost

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