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Camshaft adjusting system with means for catching hydraulic fluid draining from a valve in order to directly recirculate the fluid into the camshaft adjuster

A technology of camshaft adjuster and camshaft adjustment, which is applied in fluid pressure actuators, valve devices, engine components, etc., and can solve problems such as high inertia

Active Publication Date: 2018-12-21
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, due to such a long transport system, the inertia of the system is relatively high

Method used

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  • Camshaft adjusting system with means for catching hydraulic fluid draining from a valve in order to directly recirculate the fluid into the camshaft adjuster
  • Camshaft adjusting system with means for catching hydraulic fluid draining from a valve in order to directly recirculate the fluid into the camshaft adjuster
  • Camshaft adjusting system with means for catching hydraulic fluid draining from a valve in order to directly recirculate the fluid into the camshaft adjuster

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] exist figure 1 A camshaft adjustment system 1 according to a first preferred embodiment is shown schematically in . The camshaft adjustment system 1 is formed from a camshaft adjuster 2 and an actuator 7 acting on the camshaft adjuster 2 in an adjusting manner.

[0028] The camshaft adjuster 2 is basically embodied here as a hydraulic camshaft adjuster 2 . The camshaft adjuster 2 is designed according to the vane unit type / vane unit design. Correspondingly, camshaft adjuster 2 has an outer component referred to as stator 3 . The stator 3 is connected in a rotationally fixed manner to the traction means, ie the chain, of the traction means transmission via the traction means receptacle 18 during operation of the internal combustion engine, the traction means being connected in a conventional manner to the crankshaft of the internal combustion engine in a non-rotatable manner. The traction means receptacle 18 is also referred to as a drive wheel.

[0029] On its radia...

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Abstract

The invention relates to a camshaft adjusting system (1) for an internal combustion engine of a motor vehicle, comprising a hydraulic camshaft adjuster (2) which has a stator (3), a rotor (4) that isrotatably mounted in the stator (3), and a hydraulic control system (6) that comprises a valve (5). The rotor (4) has at least one vane which protrudes into a pressure chamber formed between the rotor(4) and the stator (3) such that the pressure chamber is divided into two sub-chambers, each of which interacts with the hydraulic control system (6) such that a hydraulic pressure ratio between thetwo sub-chambers, said ratio specifying a relative rotational position between the rotor (4) and the stator (3), is adjusted on the basis of the position of the valve (5). The camshaft adjusting system also comprises an actuator (7) which is arranged adjacently in the axial direction of the camshaft adjuster (2) and which acts on the valve (5) for adjusting purposes. A hydraulic fluid section (8)is arranged on an actuator (7) face facing the camshaft adjuster (2), said hydraulic fluid section (8) being designed to deflect a flow of hydraulic fluid exiting the valve (5) into the surroundings of the camshaft adjuster (2) back into the camshaft adjuster (2) in an operational state.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L1/344
CPCF01L2001/34423F01L2001/34433F01L2001/34436F01L2001/34483F01L1/3442F15B15/12
Inventor 斯特凡·克拉默奥拉夫·伯泽
Owner SCHAEFFLER TECH AG & CO KG
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