CN213743573U - System for compression-release in-cylinder engine braking - Google Patents
System for compression-release in-cylinder engine braking Download PDFInfo
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- CN213743573U CN213743573U CN202022558727.5U CN202022558727U CN213743573U CN 213743573 U CN213743573 U CN 213743573U CN 202022558727 U CN202022558727 U CN 202022558727U CN 213743573 U CN213743573 U CN 213743573U
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Abstract
The utility model discloses a system of compression release formula braking engine in jar, include: valves, valve caps, and brake rockers. The valve cap includes: a lower half and an upper half. The lower half part is fixed above the air valve. The upper half part can be fixed above the lower half part in a multi-direction rotating manner. The brake rocker arm is fixed above the upper half part of the valve cap. When the brake rocker arm moves downwards, the brake rocker arm is contacted with the valve cap and moves the valve downwards, so that gas in the cylinder is discharged, and the engine is braked in the cylinder. Therefore, the utility model discloses a system of compression release formula braking engine in jar, simple structure is reasonable, and can reduce the braking rocking arm and transmit spiracular transverse force, has reduced valve guide eccentric wear, cracked risk.
Description
Technical Field
The present invention relates to the field of engine technology, and more particularly to a system for compressing and releasing an in-cylinder brake engine.
Background
In order to obtain better braking performance of the whole vehicle, except for a braking system on the whole vehicle, an engine is generally provided with a braking system such as exhaust braking, in-cylinder braking and the like, wherein the compression release type in-cylinder braking principle is as follows: at the end of the compression stroke in the cylinder, the compressed gas in the cylinder is released, thus creating resistance to engine crankshaft rotation during the compression stroke and the next power stroke.
The existing cylinder braking device for releasing compressed air by jacking an air valve is characterized in that a through hole is formed in one side (right above the air valve) of an exhaust valve bridge, an air valve cap is arranged in the through hole, when an engine brakes in a non-cylinder, an exhaust rocker arm normally acts on the air valve bridge, when the engine brakes in the cylinder, the exhaust rocker arm acts on the air valve bridge, and another cylinder braking rocker arm acts on the air valve cap to control the opening and closing of the corresponding air valve, so that the purpose of releasing the compressed air in the air cylinder is achieved. However, the existing valve cap and the brake rocker arm are in point contact when being in contact, and the defects are that the transverse acting force of the brake rocker arm is easy to transmit, and after the valve is subjected to the transverse acting force, faults such as eccentric wear, breakage and the like of a valve guide pipe are easy to occur.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a system of compression release formula braking engine in jar, its simple structure is reasonable, and can reduce the braking rocking arm and transmit spiracular transverse force, has reduced valve guide eccentric wear, cracked risk.
To achieve the above object, the present invention provides a system for braking an engine in a compression-release cylinder, comprising: valves, valve caps, and brake rockers. The valve cap includes: a lower half and an upper half. The lower half part is fixed above the air valve. The upper half part can be fixed above the lower half part in a multi-direction rotating manner. The brake rocker arm is fixed above the upper half part of the valve cap. When the brake rocker arm moves downwards, the brake rocker arm is contacted with the valve cap and moves the valve downwards, so that gas in the cylinder is discharged, and the engine is braked in the cylinder.
In an embodiment of the present invention, the upper portion and the lower portion of the valve cap are in spherical contact with each other.
The utility model discloses an among the embodiment, the through-hole has been seted up to the first half of valve cap, and the through-hole is used for supplying lubricating oil to get into the contact sphere between first half and the latter half.
In an embodiment of the present invention, the through hole is opened at the center of the upper half.
In an embodiment of the present invention, the upper half portion and the lower half portion are both cylindrical structures.
In an embodiment of the present invention, the diameter of the lower half is larger than the diameter of the upper half.
The utility model discloses an in the embodiment, the inside of the latter half is hollow structure, hollow structure's size and the top structure size looks adaptation of gas valve.
Compared with the prior art, according to the utility model discloses a system of braking engine in compression release formula jar, its simple structure is reasonable, and can reduce the braking rocking arm and transmit spiracular transverse force, has reduced valve guide eccentric wear, cracked risk.
Drawings
FIG. 1 is a schematic front view of a compression-release in-cylinder brake engine system according to an embodiment of the present invention;
FIG. 2 is a schematic front view of a valve cap of a system for a compression-release, in-cylinder brake engine according to an embodiment of the present invention;
FIG. 3 is a schematic top view of a valve cap of a system for a compression-release in-cylinder brake engine according to an embodiment of the present invention;
fig. 4 is a schematic sectional view at a-a in fig. 3.
Description of the main reference numerals:
1-valve, 2-valve cap, 21-lower half, 22-upper half, 23-through hole, and 3-brake rocker.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited by the following detailed description.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
Fig. 1 is a front view schematic diagram of a system for compression-release in-cylinder braking an engine according to an embodiment of the present invention. Fig. 2 is a front view schematic diagram of a valve cap of a system for a compression-release, in-cylinder brake engine according to an embodiment of the present invention. Fig. 3 is a schematic top view of a valve cap of a system for a compression-release, in-cylinder brake engine according to an embodiment of the present invention. Fig. 4 is a schematic sectional view at a-a in fig. 3.
As shown in fig. 1 to 4, a system for a compression-release in-cylinder brake engine according to a preferred embodiment of the present invention includes: valves, valve caps, and brake rockers. The valve cap includes: a lower half and an upper half. The lower half part is fixed above the air valve. The upper half part can be fixed above the lower half part in a multi-direction rotating manner. The brake rocker arm is fixed above the upper half part of the valve cap. When the brake rocker arm moves downwards, the brake rocker arm is contacted with the valve cap and moves the valve downwards, so that gas in the cylinder is discharged, and the engine is braked in the cylinder.
In an embodiment of the present invention, the upper portion and the lower portion of the valve cap are in spherical contact with each other. The upper half part of the valve cap is provided with a through hole, and the through hole is used for allowing lubricating oil to enter a contact spherical surface between the upper half part and the lower half part.
In an embodiment of the present invention, the through hole is opened at the center of the upper half. The upper half part and the lower half part are both cylindrical structures. The diameter of the lower half is larger than the diameter of the upper half. The inside of the lower half portion is of a hollow structure, and the size of the hollow structure is matched with the size of the top structure of the air valve.
In practical application, the utility model discloses a system of compression release formula braking engine in jar, valve cap comprise first half and the latter half, the first half and the braking rocking arm direct contact of valve cap, the effort of transmission braking rocking arm, the latter half and the valve contact of valve cap, the atress of the first half of transmission valve cap to the valve, first half and latter half are the spherical surface contact, if fixed the latter half, then first half can be in the multi-direction rotation of certain extent. In order to make the two parts have good lubrication, a through hole is arranged in the middle of the upper half spherical surface of the valve cap, so that lubricating oil can enter the contact spherical surface between the two parts from the through hole. The valve cap is placed on the top of the valve stem (valve), when the brake rocker arm moves downwards, the rocker arm contacts with the valve cap and moves the valve downwards, so that the gas in the cylinder is discharged. The valve cap is used for transmitting the vertical pressing force of the brake rocker arm and reducing the transverse force applied to the valve.
In a word, the utility model discloses a system of compression release formula braking engine in jar, its simple structure is reasonable, and can reduce the braking rocking arm and transmit spiracular transverse force, has reduced valve guide eccentric wear, cracked risk.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (7)
1. A system for compression-release in-cylinder braking of an engine, comprising:
an air valve;
a valve cap, the valve cap comprising:
the lower half part is fixed above the air valve; and
the upper half part can be fixed above the lower half part in a multi-direction rotating manner; and
a brake rocker arm fixed above the upper half of the valve cap;
when the brake rocker arm moves downwards, the brake rocker arm is in contact with the valve cap and enables the valve to move downwards, so that gas in the cylinder is exhausted, and the engine is braked in the cylinder.
2. The compression-release, in-cylinder brake engine system as defined in claim 1, wherein there is spherical contact between said upper and lower halves of said valve cap.
3. The system of claim 2, wherein the upper half of the valve cap defines a through hole for oil to enter a contacting spherical surface between the upper half and the lower half.
4. A system for compression-release, in-cylinder braking an engine according to claim 3, wherein the through-hole opens at the center of the upper half.
5. A compression-release, in-cylinder brake engine system as set forth in claim 1, wherein said upper half and said lower half are of cylindrical configuration.
6. A compression-release, in-cylinder brake engine system as set forth in claim 1, wherein said lower half has a diameter greater than a diameter of said upper half.
7. A compression-release, in-cylinder brake engine system as set forth in claim 1 wherein the interior of the lower half is hollow and the dimensions of the hollow are adapted to the dimensions of the valve tip feature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022558727.5U CN213743573U (en) | 2020-11-09 | 2020-11-09 | System for compression-release in-cylinder engine braking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022558727.5U CN213743573U (en) | 2020-11-09 | 2020-11-09 | System for compression-release in-cylinder engine braking |
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| Publication Number | Publication Date |
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| CN213743573U true CN213743573U (en) | 2021-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022558727.5U Active CN213743573U (en) | 2020-11-09 | 2020-11-09 | System for compression-release in-cylinder engine braking |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112282887A (en) * | 2020-11-09 | 2021-01-29 | 广西玉柴机器股份有限公司 | System for compression-release in-cylinder engine braking |
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2020
- 2020-11-09 CN CN202022558727.5U patent/CN213743573U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112282887A (en) * | 2020-11-09 | 2021-01-29 | 广西玉柴机器股份有限公司 | System for compression-release in-cylinder engine braking |
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