Timing chain transmission system and engine

Abstract

The invention belongs to the technical field of engines, and discloses a timing chain transmission system and an engine, which comprises a first chain wheel with a first row of teeth and a second row of teeth, a second chain wheel with a third row of teeth and a fourth row of teeth, a first chain transmission assembly, a second chain transmission assembly and a third chain transmission assembly, the first chain transmission assembly comprises an air inlet cam shaft chain wheel, an exhaust cam shaft chain wheel and a first chain wound around the air inlet cam shaft chain wheel, the exhaust cam shaft chain wheel and the first row of teeth. The second chain transmission assembly comprises a third chain wheel and a second chain wound on the second row of teeth, the fourth row of teeth and the third chain wheel; the third chain transmission assembly comprises an oil pump chain wheel and a third chain wound on the third row teeth and the oil pump chain wheel, and the first chain and the third chain are located on the same plane. The axial size is reduced, the structure is compact, the occupied axial space of an engine is reduced, the overall arrangement is utilized, the assembly difficulty is reduced, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a timing chain transmission system and an engine. Background technique [0002] Such as figure 1 As shown, the timing chain transmission system 100 is arranged between the crankshaft and the camshaft, and is used to drive the crankshaft and the camshaft respectively; in some engines, an oil pump 200 for fuel supply is also provided, and the oil pump 200 is also driven by the timing chain The transmission system 100 drives. At present, as the market has higher and higher requirements for NVH (Noise, Vibration, Harshness, noise, vibration and harshness), a balance shaft system is also installed in the engine. The balance shaft system improves vibration by being equipped with a balance shaft. The engine noise can be significantly reduced, the driving experience can be improved, and a quiet riding environment can be provided for the driver and passengers. The timing chain transmiss...

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, such as figure 1 As shown, the balance shaft system includes a left balance shaft 400 and a right balance shaft 300, the timing chain drive system 100 drives the front end of the right balance shaft 300 to rotate, the left balance shaft 400 and the right balance shaft 300 are driven by gears, and the left balance shaft The rear end of the 400 drives the oil pump 200, and the balance shaft system is arranged between the oil pump 200 and the timing chain transmission system 100, resulting in a large axial dimension between the oil pump 200 and the timing chain transmission system 100, occupying the engine shaft The space is larger, which leads to problems such as difficult layout of the whole machine, complicated assembly process and low production efficiency.

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