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A timing chain system and its engine

A timing sprocket and chain technology, applied in engine components, machines/engines, mechanical equipment, etc., can solve the problems of reduced matching accuracy, poor lubrication effect of exhaust sprockets, and large movement noise, reducing mechanical wear, Improved lubrication effect and improved fit accuracy

Active Publication Date: 2021-02-19
上海瀚通汽车零部件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fluidity of the engine oil is strong. When the chain stops rotating, the oil attached to it will flow back to the bottom of the engine, which will cause the timing chain to be unable to be lubricated when the engine is started. On the other hand, the timing chain is running at high speed. , the lubricating oil attached to its surface will be thrown away, and the lubrication effect at the exhaust sprocket and timing sprocket is relatively poor
When the lubrication effect of the timing chain is poor, the wear speed is fast, the movement noise is large, and the matching accuracy with the exhaust sprocket and the timing sprocket will also be reduced, resulting in asynchronous matching of the intake and exhaust of the engine

Method used

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  • A timing chain system and its engine
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  • A timing chain system and its engine

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Embodiment Construction

[0042] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0043] refer to figure 1 , is a kind of timing chain system and its engine disclosed by the present invention, the timing chain system is mainly composed of intake sprocket 11, exhaust sprocket 12, timing sprocket 13, timing chain guide rail 14, hydraulic tensioner 15 and timing chain 16 etc. are formed. The intake sprocket 11, the exhaust sprocket 12 and the timing sprocket 13 are installed on the intake camshaft, the exhaust camshaft and the engine crankshaft respectively, and the timing chain 16 sequentially connects the three sprockets. The timing chain guide rail 14 is installed in the engine, and its effect is to apply pressure to the timing chain 16 so that it can be in a tensioned state. The timing chain guide rail 14 has two kinds of fixed type and swing type. The fixed type timing chain guide rail 14 is installed in the engine with the guide rail ...

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PUM

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Abstract

The invention relates to a timing chain system and an engine thereof. The timing chain system comprises an air inlet chain wheel, an exhaust chain wheel, a timing chain wheel, a timing chain guide rail, a hydraulic tensioner and timing chains surrounding the air inlet chain wheel, the exhaust chain wheel and the timing chain wheel, and further comprises guide blocks, channels, an oil supply chamber and an oil pipe, wherein the guide blocks are arranged at the two ends of the timing chain guide rail, the channels are arranged on the guide blocks, an input end of the oil supply chamber is connected with the hydraulic tensioner, and the oil pipe is connected with an output end of the oil supply chamber. The top surface of each guide block is an arc-shaped surface, grooves are formed in the top surfaces of the guide blocks, and the bottom surface of each groove is an arc-shaped surface. The joint of the bottom surface of each groove and the timing chain guide rail is in smooth transition,and the height difference between the highest point and the bottommost surface of each groove is 0.2mm to 0.3mm. According to the timing chain system and the engine thereof, and the timing chain can be fully lubricated, so that the effects of reducing abrasion, prolonging the service life and improving the movement precision can be achieved.

Description

technical field [0001] The invention relates to the technical field of vehicle engines, in particular to a timing chain system and its engine. Background technique [0002] With the continuous improvement of vehicle manufacturing technology and industrial development, the timing belts of some engines have been replaced by engine chains. Compared with traditional belt drives, the transmission of chain drives is reliable, durable and saves space. [0003] The chain timing system is composed of gears, chains and tensioning devices, among which the hydraulic tensioner can automatically adjust the tensioning force, so that the chain tension is consistent, the reliability is higher, and the use and maintenance costs of the engine are also reduced. Quite a lot. [0004] The timing chain has high strength and long service life, but it is noisy during operation and has high requirements for lubrication. When the oil supply is insufficient, the wear speed is fast. In the actual use ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L1/348F01M9/10
CPCF01L1/348F01M9/10
Inventor 蔡剑平秦灵林
Owner 上海瀚通汽车零部件有限公司
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