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Fixed chain type mechanism and method for producing auxiliary valve rise curve of engine

An engine, fixed chain technology, applied in the direction of engine components, machines/engines, valve devices, etc., can solve the problems of increasing volume and weight, large inertia of braking system, reducing hydraulic flexibility, etc., to reduce costs, simplify design, The effect of reducing requirements

Inactive Publication Date: 2013-12-25
SHANGHAI UNIVERSOON AUTOPARTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to reduce hydraulic flexibility, a large diameter hydraulic piston must be used, increasing volume and weight
Moreover, it takes a long time for the oil flow to extend or retract the large-diameter piston, resulting in large inertia and slow response of the braking system

Method used

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  • Fixed chain type mechanism and method for producing auxiliary valve rise curve of engine
  • Fixed chain type mechanism and method for producing auxiliary valve rise curve of engine
  • Fixed chain type mechanism and method for producing auxiliary valve rise curve of engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 1 and figure 2As shown, the fixed chain type engine brake device 100 of the present invention is composed of a brake box 2102, a driving mechanism and a braking mechanism. Intersecting vertical blind holes 190 and horizontal blind holes 260 are provided in the brake box 2102. The driving mechanism includes a driving piston 164 and a rolling ball 175. The driving piston 164 forms a fluid seal with the horizontal blind hole 260. One end of the driving piston Contact with the rolling ball to form cooperation; the braking mechanism includes a braking plunger 160 . The driving piston 164 and the rolling ball 175 are located in the horizontal blind hole 260 of the brake housing 2102, usually pushed to the left by the return spring 156, and rest on the end face 246 of the piston hole 260, as figure 1 shown. One end of the return spring 156 is located on the rolling ball 175 of the drive mechanism, and the other end is located on the spring seat 158, the spri...

Embodiment 2

[0047] Such as image 3 and Figure 4 As shown, this embodiment is an improvement on the basis of Embodiment 1, specifically, the driving piston 164 and the rolling ball 175 in Embodiment 1 are integrated into one. The left part of the driving piston 164 is a guiding and sealing piston, and the driving surface of the right part is a spherical surface 163 (also may be a conical surface, etc.).

Embodiment 3

[0049] Such as Figure 5 and Figure 6 As shown, this embodiment is also an improvement on the basis of Embodiment 1. Compared with Embodiment 1, this embodiment cancels the driving piston, increases the return piston 162, and forms a fluid seal with the horizontal blind hole 260, and the return piston 162 is provided with decompression and discharge holes 122 and 168 (also can be a tapered combined hole). The return piston 162 is combined with the return spring 156, and the return spring 156 leans against the return piston 162 on the rolling ball 175 to press the decompression hole 122 to ensure that the rolling ball 175 is always close to the return piston 162.

[0050] The working process of this embodiment is: when the engine needs to start from the normal working state (such as Figure 5 shown) to transition to engine braking state (as shown in Figure 6 As shown), the engine brake control mechanism (not shown in the figure) opens the oil supply, and the engine oil flo...

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Abstract

The invention discloses a fixed chain type mechanism for producing an auxiliary valve rise curve of an engine and a method for producing the auxiliary valve rise curve of the engine. The engine comprises a valve actuator for producing a main valve rise curve of the engine. The fixed chain type mechanism comprises a rolling ball or a driving piston or a combination of the rolling ball and the driving piston, a spring and a fluid passageway, wherein the rolling ball or the driving piston or the combination of the rolling ball and the driving piston can move between a first working position and a second working position; when the rolling ball or the driving piston or the combination of the rolling ball and the driving piston is located at the first working position, the fixed chain mechanism is in mechanical connection with a valve of the engine, and the auxiliary valve rise curve of the engine is produced; when the rolling ball or the driving piston or the combination of the rolling ball and the driving piston is located at the second working position, the fixed chain mechanism has no effect on the valve of the engine, and the auxiliary valve rise curve is switched to the main valve rise curve; the fluid passageway is used for supplying pressurized fluid, the spring and the pressurized fluid act on two sides of the rolling ball or the driving piston or the combination of the rolling ball and the driving piston respectively, and the rolling ball or the driving piston or the combination of the rolling ball and the driving piston is switched between the first working position and the second working position under the control of the spring and the pressurized fluid.

Description

[0001] This application is a divisional application of an invention patent application submitted to the China Patent Office on May 27, 2010, with the application number 201010186306.2, and the invention name is "A Fixed Chain Engine Braking Device". The entire content is recorded in the original application middle. technical field [0002] The invention relates to the mechanical field, in particular to a fixed-chain mechanism and method for generating an auxiliary valve lift curve of an engine. Background technique [0003] In the prior art, the method of using the internal combustion engine as a braking means is well known, and only the engine needs to be temporarily converted into a compressor. The fuel is cut off during the conversion process, and the exhaust valve is opened at or near the end of the engine piston compression stroke to allow the compressed gas (air during braking) to be released. The energy absorbed by the engine during the compression stroke cannot be T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L13/06
Inventor 杨洲柯恩九奚勇
Owner SHANGHAI UNIVERSOON AUTOPARTS CO LTD
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