Control valve for a camshaft adjuster
First Claim
1. A control valve for a device for variable setting of control times of gas exchange valves of an internal combustion engine, comprising:
- a valve housing of hollow construction having at least one inlet port, at least one outlet port and at least two working ports; and
a hydraulic fluid conduction insert of hollow construction arranged in the valve housing, with hydraulic fluid conduction channels arranged in a wall of the hydraulic conduction insert and communicating with the working ports, and a control piston arranged in the hydraulic fluid conduction insert, wherein the hydraulic fluid conduction insert comprises a guide sleeve, in which the control piston is guided, the guide sleeve comprising a plastics injection-molded encapsulation, in which as least two of the hydraulic fluid conduction channels are arranged, and a filter fabric is provided between the plastics injection-molded encapsulation and the guide sleeve, where the filter fabric is a complete cylinder and is arranged at least partially over the guide sleeve.
5 Assignments
0 Petitions
Accused Products
Abstract
A control valve for a device for variably setting control times of gas exchange valves of an internal combustion engine. The control valve has a valve housing, which is hollow, and at least one inflow connection, at least one exhaust connection, and at least two working connections; a hydraulic medium conduction insert disposed in the valve housing and implemented as hollow, having hydraulic medium conduction channels, which are disposed in the wall of the hydraulic medium conduction insert and communicate with the working connections; and a control piston, which is disposed in the hydraulic medium conduction insert. The hydraulic medium conduction insert has a guide sleeve, in which the control piston is guided. The guide sleeve has a plastic encapsulation, in which at least two of the hydraulic medium conduction channels are disposed, and a filter fabric is provided between the plastic encapsulation and the guide sleeve.
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Citations
11 Claims
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1. A control valve for a device for variable setting of control times of gas exchange valves of an internal combustion engine, comprising:
- a valve housing of hollow construction having at least one inlet port, at least one outlet port and at least two working ports; and
a hydraulic fluid conduction insert of hollow construction arranged in the valve housing, with hydraulic fluid conduction channels arranged in a wall of the hydraulic conduction insert and communicating with the working ports, and a control piston arranged in the hydraulic fluid conduction insert, wherein the hydraulic fluid conduction insert comprises a guide sleeve, in which the control piston is guided, the guide sleeve comprising a plastics injection-molded encapsulation, in which as least two of the hydraulic fluid conduction channels are arranged, and a filter fabric is provided between the plastics injection-molded encapsulation and the guide sleeve, where the filter fabric is a complete cylinder and is arranged at least partially over the guide sleeve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- a valve housing of hollow construction having at least one inlet port, at least one outlet port and at least two working ports; and
Specification