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Cam phaser for double camshaft

a cam phaser and camshaft technology, applied in the direction of engine components, engine lubrication, machines/engines, etc., can solve the problems of limiting the service life of the cam phaser with the double camshaft, increasing wear and heat development, etc., and achieve the effect of cost-effective reduction of the cam phaser

Inactive Publication Date: 2021-10-07
ECO HLDG 1 GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention proposes a cam phaser for a double camshaft that includes a rotor and stator and a hydraulic valve for position stabilization and lubrication of the cam phaser. The technical effect of the invention is to improve the positioning accuracy and reliability of the double camshaft without the need for a separate lubrication system, reduce wear and heat generation, and provide efficient hydraulic fluid conduction for lubricant delivery.

Problems solved by technology

Thus, relative movements occur under friction between opposite components that lead to increased wear and heat development which limits the service life of the cam phaser with the double camshaft.

Method used

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  • Cam phaser for double camshaft

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Embodiment Construction

[0018]The drawing FIGURE illustrates one of many possible embodiments of the invention and does not limit the spirit and scope of the invention.

[0019]The cam phaser 10 according to the invention for a double camshaft 12 is configured according to the drawing FIGURE. The cam phaser 10 forms a camshaft arrangement 14 together with the double camshaft 12.

[0020]The cam phaser 10 adjusts an angular relationship between a crankshaft of the internal combustion engine and the double camshaft 12 or one of two concentric camshafts of the double camshaft 12, a first camshaft 16, and a second camshaft 18 during operations of the internal combustion engine. Internal rotation of the double camshaft 12 adjusts opening and closing timing of gas control valves of the internal combustion engine so that the internal combustion engine delivers optimum power at a respective speed. The cam phaser 10 facilitates continuous adjustment of the double camshaft 12 relative to the crankshaft.

[0021]The first cam...

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Abstract

A cam phaser for a double camshaft, the cam phaser comprising: a rotor; and a stator, wherein the rotor is a rotatable relative to the stator about a rotor axis of the rotor that is coaxial to a longitudinal axis of the stator, wherein a radial vane of the rotor is positionable between two bars of the stator, wherein the radial vane divides an intermediary space formed between the two bars into two pressure cavities, wherein the double camshaft includes a first camshaft that is configured as a hollow cylinder and a second camshaft that is at least partially received in the first camshaft wherein the first camshaft and the second camshaft are rotatable relative to each other, wherein one of the first camshaft and the second camshaft is connected torque proof with the rotor and another of the first camshaft and the second camshaft is connected torque proof with the stator, wherein the rotor is movable by pressures in the two pressure chambers to cause a rotation of the first camshaft and the second camshaft relative to each other, wherein a hydraulic valve is arranged concentric to the first camshaft, the second camshaft and the rotor, and wherein the hydraulic valve is arranged axially between the second camshaft and the rotor.

Description

RELATED APPLICATIONS[0001]This application claims priority from and incorporates by reference German patent application DE 10 2020 109 328.4 filed on Apr. 3, 2020.FIELD OF THE INVENTION[0002]The invention relates to a cam phaser for a double camshaft, a camshaft arrangement and a hydraulic system.BACKGROUND OF THE INVENTION[0003]Cam phasers are being used in modern internal combustion engines for optimizing power and fuel burn by adjusting timing of gas control valves in order to be able to variably adjust a phase relationship between a crank shaft and a camshaft in a defined angular range. For this purpose, the cam phaser is integrated and received in a coupling device that facilitates transferring torques from the crank shaft to the camshaft. The cam phaser includes a rotor and a stator that are coaxially arranged relative to each other, wherein the stator radially envelops the rotor. Between the rotor and the stator chambers are provided that are loadable by a hydraulic fluid whe...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F01L1/344F01L1/053
CPCF01L1/3442F01L2001/0475F01L2001/0537F01L1/053F01L1/344F01M9/102F01L2001/34433F01L1/047F01L2001/0473F01L2001/34426F01L2810/02
Inventor SCHULZE, DIETMARSEIDENSCHWANN, ANDRÉ
Owner ECO HLDG 1 GMBH