Valve systems for internal combustion engines
An internal combustion engine, valve technology, used in engine components, machines/engines, non-mechanically actuated valves, etc., to solve problems such as cracking, piston wear, actuator failure, etc.
Active Publication Date: 2018-02-27
曼柴油机和涡轮机公司-德国曼柴油机和涡轮机欧洲股份公司之分公司
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
When having a dual piston that includes an inner piston moving in an outer piston, the dual piston suffers from failures in operation and is also very complex and expensive to manufacture
In particular, the moving parts of the dual pistons are subject to collisions, which lead to actuator failure, premature piston wear and rupture
Method used
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Embodiment Construction
[0057] figure 1 A valve system 1 for operating an exhaust or intake valve 2 of an internal combustion engine 100 by means of pressurized fluid from a pressure source P is shown. Once combustion in cylinder 3 of internal combustion engine 100 has ended, exhaust gas is discharged through exhaust valve 2 before new diesel fuel enters cylinder 3 . The valve system 1 includes an exhaust or intake valve 2 to be opened, and an actuator 4 for opening the valve. The actuator 4 includes an actuator housing 5 having an axial extension 6 between a first housing end 7 and a second housing end 8 . The first housing end 7 has a first opening 9 in fluid connection with a pressure source P to direct pressurized fluid, also referred to as high pressure fluid, into the actuator housing 5 . The piston 10 is slidably disposed in the actuator housing 5 and has a first piston end 11 and a second piston end 12 . The second piston end 12 is connected to a valve stem 14 of the exhaust valve 2 via an...
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The present invention relates to a valve system for an internal combustion engine, the internal combustion engine including the valve system, and a valve actuation method for moving an intake / exhaust valve of the valve system. The internal combustion engine comprises a pressure source of pressurised fluid. The valve system comprises an exhaust or intake valve, a piston slidable within the housing and an actuator, wherein the actuator comprises an actuator housing having an axial extension between a first housing end and a second housing end, the first housing end has a first opening fluidly connected with the pressure source, a second piston end is connected to the valve through an opening in the second housing end for activating the valve between a closed position and an open position, a first piston face faces the first housing end, the piston comprises a second piston face arranged and displaced in relation to the first piston face along the axial extension and arranged in a second chamber defined by the actuator housing and the piston, and the piston comprises a fluid channel fluidly connecting the first chamber and the second chamber, so that the fluid is led from the first chamber to the second chamber to press onto the second piston face and open the valve.
Description
technical field [0001] The present invention relates to a valve system for an internal combustion engine having a pressure source of pressurized fluid. The invention also relates to an internal combustion engine comprising the valve system according to the invention, and a valve actuation method for moving the intake / exhaust valves of the valve system according to the invention. Background technique [0002] In an internal combustion engine as shown in US 5193495, the cylinder is emptied of exhaust gas after the end of combustion and fresh gas is introduced into the cylinder during the stroke. To do this, either the exhaust valve or the intake valve needs to be opened. When opening, for example, the exhaust valve, the pressure in the cylinder is very high, and once the valve is slightly opened, the pressure drops sufficiently. The electronically operated valve is actuated by an actuator applying pressure on the top of the valve stem to move the valve downward, thereby full...
Claims
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IPC IPC(8): F01L9/02
CPCF01L9/10
Inventor E·D·佩德森
Owner 曼柴油机和涡轮机公司-德国曼柴油机和涡轮机欧洲股份公司之分公司