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Hydraulically actuated camshaft adjusting device

A camshaft adjustment and camshaft technology, applied in mechanical equipment, non-mechanically actuated valves, engine components, etc., can solve problems such as reducing throttling, achieve small amplitude, low manufacturing cost, and improve system stiffness.

Inactive Publication Date: 2015-04-01
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This has resulted in a modified control-side design of the proportional valve that reduces throttling in the input

Method used

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  • Hydraulically actuated camshaft adjusting device
  • Hydraulically actuated camshaft adjusting device
  • Hydraulically actuated camshaft adjusting device

Examples

Experimental program
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Embodiment Construction

[0033] exist figure 1 A camshaft adjusting device 1 is shown schematically in FIG. 1 , with which a camshaft 2 , shown only schematically, can be adjusted relative to a crankshaft (not shown) of an internal combustion engine in a manner known per se with respect to its relative rotational position. For details, see DE 10 2008 004 591 A1 of the applicant; the operating principle of a hydraulic camshaft adjuster is described in depth in this document, so that a detailed description thereof is unnecessary here.

[0034] The camshaft adjusting device 1 comprises a stator 3 (rotatably connected to the crankshaft of the internal combustion engine) and a rotor 4 (rotatably connected to the camshaft 2 ), wherein a rotational adjustment between the stator 3 and the rotor 4 is possible, for which Use hydraulic drive. The hydraulic drive comprises two hydraulic chambers A and B which are separated by vanes 5 which are formed on the rotor 4 . Correspondingly, a relative rotational adjus...

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PUM

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Abstract

A camshaft adjusting device (1) including at least two hydraulic chamber (A, B) disposed between a stator (3) and a rotor (4) and separated by a vane (5) and supplied with pressure oil from a pressure oil source (P) by a hydraulic oil controller (6). In order to achieve improved filling and emptying of the hydraulic chambers, the hydraulic oil controller according to the invention provides: first and second supply lines (7, 9) disposed between the pressure oil source (P) and one of the hydraulic chambers (A), wherein check valves (8, 10) are disposed in the supply lines (7), wherein the supply lines (7) are free of further switchable valve elements, and wherein the supply lines (7) are the sole inlet line for hydraulic oil from the pressurized oil source (P) into the hydraulic chambers (A, B), and a 4 / 3-way valve element (11) that is effectively disposed between the hydraulic chambers (A, B) and a tank (T) has three valve positions (I, II, III).

Description

technical field [0001] The invention relates to a hydraulically actuated camshaft adjusting device for varying the relative angular position of a camshaft of an internal combustion engine relative to a crankshaft, wherein the camshaft adjusting device has at least two hydraulically operated valves arranged between a stator and a rotor and separated by vanes. Chambers are supplied with pressurized oil from a pressurized oil source by means of a hydraulic oil control system. Background technique [0002] Camshaft adjustment devices, in particular hydraulically operated camshaft adjustment devices, are sufficiently known in the prior art. In hydraulic camshaft adjusters there is an impeller in which vanes are shaped or arranged. The vanes are located in hydraulic chambers that are machined into the outer rotor (called the stator in most cases). By correspondingly impinging the respective sides of the hydraulic chambers with hydraulic fluid, an adjustment of the inner rotor (c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01L1/344F01L9/10
CPCF01L1/3442F01L2001/34446F01L9/02F01L9/10
Inventor 斯特芬·拉克勒贝约亨·奥克特约亨·布罗兹
Owner SCHAEFFLER TECH AG & CO KG