Valve bridge and four-valve engine
A technology of valve bridge and piston top, which is applied to engine components, machines/engines, mechanical equipment, etc., and can solve problems such as the inability to realize variable valve strokes
Active Publication Date: 2020-09-29
WEICHAI POWER CO LTD
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- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The existing valve bridge 1` is a rigid structure, which can only provide fixed valve stroke opening and closing control when driving the valve, and cannot realize variable valve stroke
Method used
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Embodiment Construction
[0028] The invention discloses a valve bridge, which realizes the variable control of the valve stroke; the invention also provides a four-valve engine.
[0029] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.
[0030] Such as Figure 2-Figure 6 as shown, figure 2 Schematic diagram of the structure of the valve bridge provided by the present invention; image 3 for figure 2 Front sectional view of the ejection piston; Figure 4 for image 3 bottom view of Figure 5 for figure 2 The front view of the middle...
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The invention provides a valve bridge which comprises a valve bridge body. A piston sliding hole formed in the drive direction of the valve bridge body is formed in the top of the valve bridge body, and an ejection piston is arranged in the piston sliding hole. A piston ejection device used for driving the ejection piston to stretch out of and fall back into the piston sliding hole is further arranged on the bottom wall of the piston sliding hole. The ejection piston is arranged at the top of the valve bridge body and slides in the piston through hole up and down, the ejection piston can stretch out of the end face of the top of the valve bridge body, and therefore the thickness of the valve bridge body becomes larger, and the stroke in the work process becomes longer; and after the ejection piston falls back into the piston sliding hole, the valve bridge body restores to the original stroke. The ejection piston is driven by the piston ejection device to stretch out and fall back, thework stroke of the valve bridge body is changeable, and therefore an engine valve executes different gas intake requirements, and the requirement that engine valve forming is changeable is met. The invention further provides a four-valve engine with the valve bridge structure.
Description
technical field [0001] The invention relates to the technical field of engines, more specifically, to a valve bridge and a four-valve engine. Background technique [0002] The function of the valve is to be responsible for inputting air into the engine and discharging the exhaust gas after combustion. From the structure of the engine, it is divided into intake valve and exhaust valve. The role of the intake valve is to draw air into the engine and mix it with fuel for combustion; the role of the exhaust valve is to discharge the burned exhaust gas and dissipate heat. In addition to the corrosion of high-temperature gas, the valve and valve seat also bear the impact of the explosion pressure in the cylinder. [0003] For a four-valve engine, the valves are driven by the force of the rocker arm transmitted by the valve bridge installed on the top of the valves, ensuring that the valves of the same name are opened at the same time. For the engine, high speed needs to inhale ...
Claims
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IPC IPC(8): F01L1/26
CPCF01L1/26
Inventor 李栋王刚徐得石乔芳马高强苑增睿
Owner WEICHAI POWER CO LTD