Engine oil lubrication type high-pressure variable pump camshaft

Abstract

The invention provides an engine oil lubrication type high-pressure variable pump camshaft, which comprises a camshaft body, flanging shaft sleeves, cylindrical shaft sleeves and cam rings, wherein the camshaft body comprise a gear, a plurality of eccentric cams and a plurality of shaft necks; an engine oil main oil gallery is arranged in the internal center axis of the camshaft body; the camshaft body is provided with an engine oil inlet, a gear lubrication oil hole, shaft neck lubrication oil galleries, eccentric cam lubricating oil holes and eccentric cam lubricating oil grooves from the driving end to the rear end in sequence; the engine oil inlet is communicated with the engine oil main oil gallery; the gear lubrication oil hole is communicated with the gear; the shaft neck lubrication oil galleries are used for lubricating the shaft necks; and the eccentric cam lubricating oil holes and the eccentric cam lubricating oil grooves are used for lubricating the eccentric cams. Compared with the prior art, the engine oil lubrication type high-pressure variable pump shaft has the following advantages that the oil supply amount and oil supply pressure of a large-flow fuel oil supply system can be met by the engine oil lubrication type high-pressure variable pump camshaft; meanwhile, the lubrication and friction statuses between the camshaft and a driven element are improved; and the durability and reliability of the camshaft are increased.

Description

technical field [0001] The invention belongs to the technical field of engine fuel supply systems, and in particular relates to an oil-lubricated high-pressure variable pump camshaft for improving cam wear and optimizing the lubrication mode of the high-pressure variable pump. Background technique [0002] With the increasingly stringent emission regulations, the fuel supply rate and fuel injection pressure required by diesel engines continue to increase, and the requirements for plunger diameter, fuel supply pre-stroke and lift continue to increase. Finally, the oil supply pressure and the inertial force of the moving parts will all fall on the cam, so the working intensity of the camshaft is very large. [0003] In the prior art, the continuous increase of engine speed and load makes the wear problem between the cam and the follower more and more serious. The wear of the parts will lead to the increase of the gap, resulting in the decrease of motion accuracy and increase o...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the continuous increase of engine speed and load makes the wear problem between the cam and the follower more and more serious. The wear of the parts will lead to the increase of the gap, resulting in the decrease of motion accuracy and increase of noise, which will affect the oil supply performance

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