Camshaft adjustment system with hydraulic medium return device

A technology of camshaft adjustment and camshaft adjuster, which is applied in the direction of engine components, machines/engines, fluid pressure actuators, etc., and can solve the problem of high inertia
CN109072725BActive Publication Date: 2021-04-27SCHAEFFLER TECH AG & CO KG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SCHAEFFLER TECH AG & CO KG
Publication Date
2021-04-27

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Abstract

The invention relates to a camshaft adjustment system (1) for an internal combustion engine of a motor vehicle, with a hydraulic camshaft adjuster (2) having a stator (3) supported in a torsion manner on the stator ( 3) the rotor (4) and the hydraulic control system (6) including the valve (5), wherein the rotor (4) has at least one vane that extends into the gap formed between the rotor (4) and the stator (3) In the pressure chamber, so that the pressure chamber is divided into two sub-chambers, where each sub-chamber cooperates with the hydraulic control system (6) to adjust the preset rotor between the two sub-chambers ( 4) hydraulic pressure ratio to the relative rotational position between the stator (3); the camshaft adjustment system also has an actuator (7) arranged adjacently in the axial direction of the camshaft adjuster (2), It acts regulatingly on the valve (5), wherein on the side of the actuator (7) facing the camshaft adjuster (2) a hydraulic medium guide section (8) is arranged, the hydraulic medium The guide section (8) is designed in such a way that it redirects the flow of hydraulic medium escaping from the valve (5) into the surroundings of the camshaft adjuster (2) in the operating state back to the camshaft adjuster (2).
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Description

technical field

[0001] The invention relates to a camshaft adjustment system for an internal combustion engine, for example a diesel or gasoline engine, of a motor vehicle, such as a passenger car, a van, a bus or an agricultural commercial vehicle, with a hydraulic camshaft adjuster (of the vane unit type), which Hydraulic camshaft adjuster with a stator, a rotor torsionally mounted / accommodated in the stator and a hydraulic control system including valves, wherein the rotor has at least one vane which protrudes into a pressure chamber formed between the rotor and the stator , so that the pressure chamber is divided into two sub-chambers, wherein each sub-chamber cooperates / connects with the hydraulic control system, thereby adjusting the relative rotation between the preset rotor and the stator between the two sub-chambers according to the position of the valve The hydraulic pressure ratio of the position; the camshaft adjustment system also has an actuator arranged adjacent...

Claims

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