Variable compression ratio connecting rod control device

Abstract

The invention discloses a variable compression ratio connecting rod control device. The variable compression ratio connecting rod control device is mainly composed of a connecting rod cover, a one-way valve spring, a one-way valve ejector pin, a one-way valve seat, an inner hexagonal screw plug, an oil discharge screw, a valve element, a valve element plug and a double-oil-duct connecting rod lower bearing bush, meets the requirements of engines with different purposes for the compression ratio, and meanwhile provides a control method capable of being applied to engineering hydraulic machinery, and the requirement of hydraulic control is met. The variable compression ratio connecting rod control device has the beneficial effects that automatic adjustment is realized by adjusting high-pressure oil through low pressure, and the adjustment is convenient; the application of the one-way valve ejector pin and the one-way valve seat structure has the pressure self-locking function, the one-way circulation effect is achieved, and pressure relief of high-pressure oil is prevented; the device can be used for gasoline engines, diesel engines, gas fuel engines, dual-fuel engines, engineering hydraulic control mechanical devices and the like; and the device has the advantages of being simple in structure, convenient to control, easy to implement and the like.

Description

technical field [0001] The invention relates to the technical field of internal combustion engines, in particular to a variable compression ratio connecting rod control device, which can also be used in related engineering hydraulic oil circuit control systems. Background technique [0002] In order to realize the variable compression ratio technology of the engine, the common control methods in the world mainly include mechanical and hydraulic methods. This technology research realizes the hydraulic control of the high-pressure oil chamber through the hydraulic control of the low-pressure oil circuit, and then realizes the control of the connecting rod. Variable adjustment of length. [0003] At present, there is a lot of research in the field of variable compression ratio (VCR) technology, and many patents have been applied for. However, due to the influence of many factors such as structure, control, and reliability, there are almost no examples of mass-produced products ...

AI Technical Summary

Problems solved by technology

[0003] At present, there are many researches in the field of variable compression ratio (VCR) technology, and many patents have been applied for. However, due to the influence of many factors such as structure, control, and reliability, there are almost no examples of mass-produced products that can be applied to engines.

[0004] Most of the hydraulic control modes for variable compression connecting rods used in the prior art remain at the principle stage, or cannot be transformed into products due to processing problems or layout problems

The hydraulic control mechanism needs to drill multiple holes on the basis of the original connecting rod and connecting rod cover, which is lacking in structure and strength, and has high requirements for machining accuracy, and there is a risk of leakage; in addition, it is used in variable compression ratio connecting rods At the same time, it is necessary to open two additional low-pressure oil passages on the crankshaft, resulting in increased processing costs

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