Variable compression ratio engine crankshaft device

A technology of compression ratio and engine, applied in the direction of engine components, machine/engine, crankshaft bearing, etc., can solve the problem that it is impossible to ensure that the compression ratio of the engine is completely consistent at the same time, and achieve the effect of completely consistent compression ratio

Pending Publication Date: 2021-10-12
GUANGZHOU AUTOMOBILE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above problems, the object of the present invention is to provide a variable compression ratio engine crankshaft device, which can solve the problem that the variable compression ratio engine in the prior art is almost impossible to ensure that the compression ratios of each cylinder of the engine are completely consistent at the same time

Method used

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  • Variable compression ratio engine crankshaft device
  • Variable compression ratio engine crankshaft device
  • Variable compression ratio engine crankshaft device

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Embodiment approach

[0029] Further, see figure 1 and figure 2 , as a specific embodiment of the variable compression ratio engine crankshaft device provided by the present invention, the eccentric bushing 2 includes an upper eccentric bushing body 21 and a lower eccentric bushing body 22, and the upper eccentric bushing body 21, The cross-section of the lower eccentric shaft sleeve body 22 is semicircular; the upper eccentric shaft sleeve body 21 is provided with an upper eccentric groove 231, and the lower eccentric shaft sleeve body 22 is provided with a lower eccentric groove 232; the upper eccentric shaft sleeve body 22 is provided with a lower eccentric groove 232; The shaft sleeve body 21 is docked with the lower eccentric shaft sleeve body 22 so that the upper eccentric groove 231 is engaged with the lower eccentric groove 232 to form the eccentric hole 23 . In this way, it is convenient to assemble with the crankshaft 1 , and at the same time, it is more convenient to overhaul the upper...

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PUM

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Abstract

The invention discloses a variable compression ratio engine crankshaft device which comprises a crankshaft, a plurality of eccentric shaft sleeves, a connecting support and a driving mechanism. The eccentric shaft sleeves are fixed on the connecting support side by side; each eccentric shaft sleeve is provided with an eccentric hole matched with the crankshaft; the crankshaft is arranged in each eccentric hole in a penetrating manner; and the driving mechanism is connected with the connecting support and drives the connecting support to rotate. The variable compression ratio engine crankshaft device disclosed by the invention can effectively solve the problem that in the prior art, a variable compression ratio engine is almost impossible to ensure that the compression ratios of all air cylinders of the engine are completely consistent at the same time.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a variable compression ratio engine crankshaft device. Background technique [0002] The engine compression ratio refers to the ratio of the cylinder volume when the piston moves to the bottom dead center to the cylinder volume when the piston moves to the top dead center. The compression ratio of most engines is fixed now, and the intake charge is small at low speeds, and the actual compression ratio is lower than the designed compression ratio, which cannot fully atomize and burn the fuel. At high speeds, the amount of air in the cylinder is greater than the volume in the cylinder, and the actual compression ratio is higher than the designed compression ratio. At this time, knocking and early combustion are prone to occur, which reduces the power output and increases damage to the engine. [0003] The variable compression ratio technology can realize the change of the compress...

Claims

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Application Information

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IPC IPC(8): F02B75/04F16C9/02F16C33/04F16C33/12
CPCF02B75/047F16C9/02F16C33/046F16C33/121F16C2360/22
Inventor 杨江吴广权罗海鹏易敬华
Owner GUANGZHOU AUTOMOBILE GROUP CO LTD
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