Valve mechanism comprising a variable cross-section of a valve opening
AssigneeRobert Bosch GbmH
InventorUwe Hammer
Life of this patent
Estimating the term…
Abstract
The invention relates to an intake or exhaust valve mechanism with a variable valve opening cross section for use in an admission opening of an internal combustion engine and having a gas exchange valve acted on by the force of a valve spring and displaceable axially back and forth inside a guide by a valve control unit; the position of the sealing slide relative to the gas exchange valve in the axial direction is continuously variable by means of an adjusting unit. A sealing slide is disposed coaxially to the gas exchange valve, is acted upon by the force of a coupling spring, and is displaceable axially back and forth by the valve control unit.
Claims19
In a valve mechanism with a variable valve opening cross section, in which the valve mechanism is disposed at an admission opening of an internal combustion engine and has a gas exchange valve, which is acted on by the force of a valve spring and is displaceable axially back and forth inside a guide by a valve control unit, the improvement comprising a sealing slide (10) disposed coaxially to the gas exchange valve (12), wherein the variable opening is created between the gas exchange valve (12) and the sealing slide, the sealing slide (10) being displaceable axially back and forth by the valve control unit, including a coupling spring (24) acting on and applying force to the sealing slide (10), the valve mechanism including means which, when the sealing slide is being axially displaced by the control unit, can stop the motion of the sealing slide at a selected position, so that, as the gas exchange valve (12) continues to travel after the sealing slide is stopped, the variable valve opening between the gas exchange valve (12) and the sealing slide (10) is created.
In a valve mechanism with a variable valve opening cross section, in which the valve mechanism is disposed at an admission opening of an internal combustion engine and has a gas exchange valve, which is acted on by the force of a valve spring and is displaceable axially back and forth inside a guide by a valve control unit, the improvement comprising a sealing slide (10) disposed coaxially to the gas exchange valve (12), the sealing slide (10) being displaceable axially back and forth by the valve control unit, and a coupling spring (24) acting on and applying force to the sealing slide (10), the control unit being operable to jointly trigger movement of the gas exchange valve (12) and the sealing slide (10), wherein during a first portion of movement of the gas exchange valve (12) the sealing slide (10) moves with the gas exchange valve (12) so that the gas exchange valve remains closed, and then movement of the sealing slide (10) is stopped during a second portion of movement of the gas exchange valve (12) so that during the second portion of movement of the gas exchange valve (12) the gas exchange valve (12) is opened.
Dependencies are inferred from the claim text.