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Variable compression ratio device with connecting rod journals and eccentric sleeves

A technology of connecting rod journal and eccentric sleeve, which is applied in the field of automobile, can solve the problems of heavy structure, low reliability and uneven force of the fitting eccentric sleeve, so as to strengthen the strength, increase the self-locking safety factor, and improve the strength. Effect

Inactive Publication Date: 2013-04-17
沈大兹
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0026] Another object of the present invention is to solve the problem of low reliability caused by the bulky structure of the mating eccentric sleeve and uneven force.

Method used

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  • Variable compression ratio device with connecting rod journals and eccentric sleeves
  • Variable compression ratio device with connecting rod journals and eccentric sleeves
  • Variable compression ratio device with connecting rod journals and eccentric sleeves

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] See first Image 6 The transmission mechanism diagram of the variable compression ratio device of the eccentric sleeve of the connecting rod journal. The connecting rod journal eccentric sleeve variable compression ratio device shown in the figure is installed on the engine, which includes: crankshaft, piston connecting rod assembly, eccentric shaft sleeve assembly, transmission shaft and gear assembly, and driver assembly.

[0071] The crankshaft is a disk-shaped crankshaft, which is formed by combining a traditional engine main journal and a crank arm. The second disc-shaped main journal 18 and the crankshaft rear end journal 23, they follow the crankshaft front-end journal 7, the first disc-shaped main journal 17, a connecting rod journal 2, and a second disc-shaped main journal 18 from front to back. , a connecting rod journal 2, a second disc-shaped main journal 18 ... crankshaft rear end journal 23 are sequentially connected together. The number of the connectin...

Embodiment 2

[0078] The structure of the second embodiment is basically the same as that of the first embodiment, except that the eccentric sleeve 1 is an integral structure, and the crankshaft is a combined structure, that is, the crankshaft front journal 7, the first disc-shaped main journal 17 , a plurality of connecting rod journals 2, a plurality of second disc-shaped main journals 18 and crankshaft rear end journal 23 are all independent members, and they are assembled into a crankshaft after processing respectively. The integral eccentric sleeve 1 has improved strength, uniform stress, and improved reliability. The combined crankshaft is to facilitate the assembly of the integral eccentric sleeve 1 .

[0079] The present invention can be used not only for single-cylinder engines, but also for multi-cylinder engines such as 2-cylinders, 3-cylinders and even 8-cylinders; the present invention is not only suitable for in-line engines, but also V-type, W-type, star-shaped and opposed A...

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Abstract

A variable compression ratio device with connecting rod journals and eccentric sleeves comprises a crankshaft, a piston connecting rod assembly, eccentric shaft sleeve assemblies, transmission shaft and gear assemblies and a driver assembly, wherein the crankshaft is a disk crankshaft and comprises a crankshaft front-end journal, a first disk main journal, a plurality of connecting rod journals, a plurality of second disk main journals and a crankshaft rear-end journal. Each disk main journal is provided with one transmission shaft and gear assembly, the center line of each transmission shaft and gear assembly is not overlapped with that of the crankshaft, one eccentric shaft sleeve assembly is rotatably sleeved on each connecting rod journal and is connected with the corresponding transmission shaft and gear assembly by gears, and the driver assembly is connected with the transmission shaft and gear assemblies and drive the transmission shaft and gear assemblies to rotate, so that the eccentric shaft sleeve assemblies are rotated, and compression ratios of cylinders of engines are synchronously changed. The variable compression ratio device has the advantages of high crankshaft strength, high eccentric sleeve self-locking capacity, wide engine compression ratio adjusting range, high reliability and long service life.

Description

technical field [0001] The invention relates to a variable compression ratio device for a reciprocating piston engine in a vehicle, in particular to a variable compression ratio device for an eccentric sleeve of a connecting rod journal, which belongs to the technical field of automobiles. Background technique [0002] As we all know, the combustion efficiency of a vehicle engine directly determines the output efficiency of the engine, and improving the efficiency of the engine plays a vital role in reducing carbon emissions and reducing the consumption of fuels such as petroleum. One of the biggest problems in improving the combustion efficiency of engines is that when the engine is under partial load, as the air and fuel entering the cylinders decrease, the engine cannot reach the predetermined ignition temperature and cannot ignite normally. And as the air and fuel entering the cylinder increase, so-called "combustion knock" is prone to occur, which will cause damage to t...

Claims

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Application Information

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IPC IPC(8): F02B75/04
Inventor 沈大兹
Owner 沈大兹
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