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Device for variably adjusting the valve timing of gas exchange valves of an internal combustion engine

A valve phase, internal combustion engine technology, applied in valve devices, mechanical equipment, engine components, etc., can solve the problems of complex cost, uncompensated tolerance deviation, high cost, etc., and achieve the effect of low price and elimination of reprocessing steps.

Inactive Publication Date: 2011-06-08
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this is a complex and costly multi-stage production method
Furthermore, due to the double press fit of the pins, the tolerance deviations of the openings cannot be compensated for each other
As a result, a throttling effect can occur at the interface between the driven element and the camshaft despite the fact that the components are aligned with each other

Method used

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  • Device for variably adjusting the valve timing of gas exchange valves of an internal combustion engine
  • Device for variably adjusting the valve timing of gas exchange valves of an internal combustion engine
  • Device for variably adjusting the valve timing of gas exchange valves of an internal combustion engine

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Embodiment Construction

[0025] exist figure 1 An internal combustion engine 1 is sketched in , wherein a piston 3 resting on a crankshaft 2 is shown in a cylinder 4 . In the illustrated embodiment, the crankshaft 2 is kept connected to the intake camshaft 6 or the exhaust camshaft 7 via each traction mechanism transmission member 5, wherein the first device and the second device 11 can be responsible for connecting the crankshaft 2 with the camshaft 6. , The relative rotation between 7. The cams 8 of the camshafts 6 , 7 actuate one or more intake gas exchange valves 9 or one or more exhaust gas exchange valves 10 . It can likewise be provided that only one of the camshafts 6 , 7 is equipped with the device 11 or that only one camshaft 6 , 7 is provided and that this one camshaft is equipped with the device 11 .

[0026] figure 2An embodiment of the device 11 according to the invention is shown in longitudinal section. The device 11 has a drive element 12 and a driven element 14 . The drive elem...

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Abstract

The invention relates to a device (11) for variably adjusting the valve timing of gas exchange valves (9, 10) of an internal combustion engine (1) comprising an input element (12), an output element (14) and a camshaft (6, 7). The input element (12) can be brought in a driving connection with the crankshaft (2) of the internal combustion engine (1). The output element (14) is non-rotationally connected to the camshaft (6, 7) and arranged so as to be swivelable in relation to the input element (12). At least one first pressure chamber (26a) is provided, a phase position between the output element (14) and the input element (12) being modifiable by supplying a pressure medium to or discharging a pressure medium from the first pressure chamber (26a). An axial lateral face (36) of the camshaft (6, 7) rests against an axial lateral face (37) of the output element (14). The camshaft (6, 7) comprises at least one first pressure medium line (30) having a first opening (31) on the axial lateral face (36) thereof, the output element (14) having at least one second pressure medium line (32) having a second opening (33) on the axial lateral face (37) thereof and leading into the first pressure chamber (26a) and the first opening (31) being axially opposite the second opening (33).

Description

technical field [0001] The invention relates to a device for variable adjustment of the timing of gas exchange valves of an internal combustion engine, comprising: a drive element, a driven element and a camshaft, wherein the drive element can be brought into drive connection with the crankshaft of the internal combustion engine , wherein the driven element is connected to the camshaft in a rotationally fixed manner and is arranged pivotably relative to the drive element, wherein at least one first pressure chamber is provided, wherein, by inputting the pressure into the first pressure chamber Medium or output pressure medium from the first pressure chamber, can change the phase between the driven element and the driving element, wherein the axial side of the camshaft abuts against the axial side of the driven element, wherein the camshaft has at least one first pressure medium line with a first opening on its axial side, wherein the driven element has at least one second pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L1/344
CPCF01L1/3442
Inventor 艾哈迈德·德内里
Owner SCHAEFFLER TECH AG & CO KG