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Valve component for four-valve diesel

A diesel engine and four-valve technology, which is applied to the lubrication of engine components, mechanical equipment, and valve accessories, can solve problems such as valve stem manufacturing errors, valve bridges that cannot be leveled, and valve bridges that are inclined, and achieve the effect of ensuring lubrication

Inactive Publication Date: 2012-07-18
GUANGXI YUCHAI MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, for a diesel engine with four valves in one cylinder head, the existing technology uses one valve bridge to directly press down two valves for driving two exhaust valves of one cylinder. The matching and research of the valve seat ring (when the valve is assembled, it is often necessary to grind the valve seat ring to make the valve installation meet the design requirements) will cause the height of the top of the two valve stems to be different, so that the valve bridge cannot be guaranteed after installation. Horizontal, and then the vertical movement required during the downward movement of the valve bridge cannot be guaranteed, causing the force transmitted from the rocker arm to the valve bridge to be inclined, which eventually leads to uneven force on the two exhaust valves of the same cylinder, causing the valve stem to break easily Fault

Method used

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  • Valve component for four-valve diesel
  • Valve component for four-valve diesel
  • Valve component for four-valve diesel

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Embodiment Construction

[0019] A specific embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment.

[0020] Such as figure 1 As shown, the valve assembly for a four-valve diesel engine of the present invention includes a valve bridge 4 and an exhaust valve 3 positioned at both ends of the valve bridge 4, and the top of the exhaust valve 3 is in contact with the valve bridge 4 (can realize the lowering of the valve bridge to the exhaust valve) pressure); the valve bridge 4 presses down the valve bridge under the action of the rocker arm to push the exhaust valve 3 at both ends to move downward together, and the exhaust valve 3 opens at this time; the downward thrust of the rocker arm is not enough to overcome the restoring force of the valve spring At this time, the exhaust valve 3 and the valve bridge 4 at both ends move ...

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PUM

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Abstract

The invention discloses a valve component for a four-valve diesel, which comprises valve bridges and valves at two ends of each air valve bridge. The top ends of the valves are in contacted connection with the valve bridges, each valve bridge presses down to push the valves at two ends to jointly move down under the action of a rocker, and the valves are open. When down pushing force of the rockers is insufficient to overcome restoring force of valve springs, the valves at two ends and the corresponding valve bridge move up together under the action of the springs, and the valves are closed. A valve height adjusting mechanism is arranged at one end of each valve bridge and enables the valve bridges to keep horizontal and vertical movement in use. The top ends of valve rods can be uniform in height by adjusting the adjusting mechanism at one end of each valve bridge to effectively guarantee vertical movement of the valve bridges, and the two valves controlled by each valve bridge can be stressed simultaneously, so that unfavorable influences of non-uniform top heights of the valve rods caused by manufacturing and fitting problems of the valves can be effectively eliminated.

Description

technical field [0001] The invention relates to the field of diesel engines, in particular to a valve assembly of a four-valve diesel engine. Background technique [0002] At present, for a diesel engine with four valves in one cylinder head, the existing technology uses one valve bridge to directly press down two valves for driving two exhaust valves of one cylinder. The matching and research of the valve seat ring (when the valve is assembled, it is often necessary to grind the valve seat ring to make the valve installation meet the design requirements) will cause the height of the top of the two valve stems to be different, so that the valve bridge cannot be guaranteed after installation. Horizontal, and then the vertical movement required during the downward movement of the valve bridge cannot be guaranteed, causing the force transmitted from the rocker arm to the valve bridge to be inclined, which eventually leads to uneven force on the two exhaust valves of the same cy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L1/20F01L1/12F01M9/10
Inventor 蔡小伟苏怀林刘振锋陈剑涛
Owner GUANGXI YUCHAI MASCH CO LTD
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