A control valve for a hydraulic adjuster for the camshaft of an internal combustion engine is provided, wherein an actuator acts on a pressure part (12) embedded in a control piston (5). In order to prevent the piston (5) from being blocked in the valve housing by the expansion thereof caused by the
A control valve for a hydraulic adjuster for the camshaft of an internal combustion engine is provided, wherein an actuator acts on a pressure part (12) embedded in a control piston (5). In order to prevent the piston (5) from being blocked in the valve housing by the expansion thereof caused by the pressure part embedment, the pressure part (12) and/or the control piston (5) is/are provided with radial recesses (34) in the embedment area (13) which make it possible to limit joining forces and the resulting radial expansion of the piston (5). Alternatively or in addition, the external surface of the control valve (5) has a reduced cross-section in the embedment area (13).
대표청구항▼
1. Control valve for influencing pressurization of a camshaft actuator of an internal combustion engine with pressurized medium, the control valve comprising: a) a valve housing and b) a control piston, which is arranged in the valve housing and which can be displaced axially, wherein c) pressurizat
1. Control valve for influencing pressurization of a camshaft actuator of an internal combustion engine with pressurized medium, the control valve comprising: a) a valve housing and b) a control piston, which is arranged in the valve housing and which can be displaced axially, wherein c) pressurization of a pressurized medium connection, a tank connection, and at least one work connection with pressurized medium can be changed as a function of an axial position of the control piston and d) the control piston has a pressure part, da) which is embedded in an embedding region with an outer casing surface into an inner casing surface of an end-side recess of the valve housing in the valve housing and db) on which an actuator for generating a displacement of the control piston acts, e) at least one of the outer or inner casing surface has at least one partial region, which has a smaller stiffness and is less resistant to deformation in a radial direction than another partial region. 2. Control valve according to claim 1, wherein the at least one partial region with reduced stiffness is formed with radial recesses. 3. Control valve for influencing the pressurization of a camshaft actuator of an internal combustion engine with pressurized medium, the control valve comprising: a) a valve housing and b) a control piston, which is arranged in the valve housing and which can be displaced axially, wherein c) pressurization of a pressurized medium connection, a tank connection, and at least one work connection with pressurized medium can be changed as a function of an axial position of the control piston and d) the control piston has a pressure part, da) which is embedded in an embedding region with an outer casing surface into an inner casing surface of an end-side recess of the valve housing in the valve housing and db) on which an actuator for generating a displacement of the control piston (5) acts, and e) in an embedding region of the pressure part, a gap is provided between an outer casing surface of the control piston and a guide borehole of the valve housing. 4. Control valve according to claim 3, wherein in the embedding region of the pressure part, the outer casing surface of the control piston has a partial region of reduced diameter. 5. Control valve according to claim 4, wherein a guide surface of the control piston connects to the partial region of reduced diameter. 6. Control valve for influencing the pressurization of a camshaft actuator of an internal combustion engine with pressurized medium, the control valve comprising: a) a valve housing, b) a control piston, which is arranged in the valve housing and which can be displaced axially, wherein c) pressurization of a pressurized medium connection, a tank connection, and at least one work connection with pressurized medium can be changed as a function of an axial position of the control piston and d) the control piston has a pressure part, on which an actuator for generating a displacement of the control piston acts, and e) the pressure part has a hardened surface at least in a region of a contact surface interacting with the actuator, wherein the hardened surface has a smaller diameter than a base end of the pressure part. 7. Control valve according to claim 6, wherein the hardened surface is hardened by deep drawing. 8. Control valve according to claim 7, wherein the pressure part is calibrated after the hardened surface is hardened. 9. Control valve according to claim 6, wherein the hardened surface is heat treated for hardening.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (11)
Strauss, Andreas; Röhr, Andreas; Hoppe, Jens, Control valve for a device changing the control times of an internal combustion engine.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.