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Eccentric crank connecting rod structure

A technology of connecting rod structure and eccentric crank, which is applied in the directions of machines/engines, mechanical equipment, etc., can solve the problems of large offset distance, difficult operation, and increased cost.

Pending Publication Date: 2021-02-23
GUANGXI YUCHAI MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the narrow space of the internal combustion engine, such a large offset distance will inevitably increase the cost and make the operation difficult

Method used

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  • Eccentric crank connecting rod structure
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Embodiment Construction

[0014] Attached below Figure 1-2 The present invention will be described in detail with specific embodiments.

[0015] See figure 1 , This embodiment provides an eccentric crank connecting rod structure, which is installed on the cylinder block 1 and includes a crankshaft 2 , a connecting rod 3 , a piston pin 4 and a piston 5 . The crankshaft 2 is installed on the cylinder block 1, the opposite ends of the connecting rod 3 are respectively connected to the crankshaft 2 and the piston pin 4, and the piston 5 is connected to the connecting rod 3 through the piston pin 4. The opposite sides of the piston 5 are respectively provided with a main thrust side 6 and an auxiliary thrust side 7, and the rotation centerline of the crankshaft 2 is offset (1.5~3) λmm in the direction of the main thrust side 6, wherein, λ=r / ι, r For the radius of crankshaft 2, ι is the length of connecting rod 3.

[0016] When the eccentric crank connecting rod structure of the present invention is work...

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Abstract

The invention discloses an eccentric crank connecting rod structure. The structure is installed on a cylinder body and comprises a crankshaft, a connecting rod, a piston pin and a piston, wherein thecrankshaft is installed on the cylinder body, the two opposite ends of the connecting rod are separately connected to the crankshaft and the piston pin, the piston is connected to the connecting rod through the piston pin, a main thrust side and an auxiliary thrust side are separately arranged on the two opposite sides of the piston, and a rotating center line of the crankshaft deviates by (1.5-3)lambda mm in the direction of the main thrust side, wherein lambda equals r / iota, r is a radius of the crankshaft, and iota is a length of the connecting rod. According to the eccentric crank connecting rod structure, under the condition that a cylinder diameter and a connecting rod ratio are limited, eccentric arrangement is adopted, that is, a rotating center of the crankshaft deviates from thecenter of a cylinder hole, so that lateral force of the piston is reduced, the friction loss of the whole machine is reduced, and the abrasion life is prolonged.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to an eccentric crank connecting rod structure. Background technique [0002] The crank and connecting rod system layout of the existing Yuchai 3L engine draws on the design experience of the same displacement or similar light diesel engines. The crank radius r=53.45mm, the connecting rod length ι=159mm, and the connecting rod ratio λ=2.975. Under the constraints of cylinder diameter and connecting rod ratio, with the increase of the maximum explosion pressure of the National VI engine, the explosion pressure of the piston side force increases, which seriously affects the friction loss and wear life of the whole machine. [0003] The existing patent literature, the patent name is "internal combustion engine with partial piston offset", the patent number is CN2017113433584, and the publication number is CN108204277A. This invention patent relates to an internal combustion engine with...

Claims

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Application Information

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IPC IPC(8): F02B75/32
CPCF02B75/32
Inventor 张锦包毅蔚兴建苏怀林陈彪董家枝覃海玉刘显宏韦齐峰
Owner GUANGXI YUCHAI MASCH CO LTD
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