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Device for variably adjusting the control times of gas exchange valves of an internal combustion engine

A technology of internal combustion engines and gas exchange valves, applied in the direction of mechanical equipment, valve devices, engine components, etc.

Active Publication Date: 2012-07-04
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the pressure chamber is connected to the pressure medium pump, but only for compensating leakage by the phasing device

Method used

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  • Device for variably adjusting the control times of gas exchange valves of an internal combustion engine
  • Device for variably adjusting the control times of gas exchange valves of an internal combustion engine
  • Device for variably adjusting the control times of gas exchange valves of an internal combustion engine

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Experimental program
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Embodiment Construction

[0024] exist figure 1 An internal combustion engine 1 is depicted in , wherein a piston 3 seated on a crankshaft 2 is shown in a cylinder 4 . In the embodiment shown, the crankshaft 2 is connected to the intake camshaft 6 or the exhaust camshaft 7 via a traction gear transmission 5 in each case, wherein the gas distribution of the gas exchange valves 9 , 10 of the internal combustion engine 1 is variably adjusted. The timing of the first and second devices 11 can cause relative rotation between the crankshaft 2 and the camshafts 6 , 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 with the device 11 .

[0025] figure 2 A first embodiment of the device 11 according to the invention is shown in longitudinal section. image 3 A plan view onto the phase ...

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Abstract

The invention relates to a device (11) for variably adjusting the control times of gas exchange valves (9, 10) of an internal combustion engine (1) having a hydraulic phase adjustment device (12) and at least one volume accumulator (31), wherein the phase adjustment device (12) can be brought into driving connection with a crankshaft (2) and a camshaft (6, 7) and at least one early adjustment chamber (24) and at least one late adjustment chamber (25) which can be supplied with pressure mediums via pressure medium lines (26a, 26b, 26p, 26v), or from which pressure mediums can be drained. A phase position of the camshaft (6, 7) can be adjusted relative to the crankshaft (2) in the direction of early control times by supplying pressure mediums to the early adjustment chamber (24) while simultaneously draining pressure mediums from the late adjustment chamber (25), wherein a phase position of the camshaft (6, 7) can be adjusted relative to the crankshaft (2) in the direction of late control times by supplying pressure mediums to the late adjustment chamber (25) while simultaneously draining pressure mediums from the early adjustment chamber (24), wherein pressure mediums can be supplied to the volume accumulator(s) (31) during operation of the internal combustion engine (1).

Description

technical field [0001] The invention relates to a device for variably adjusting the timing of gas exchange valves of an internal combustion engine, with a hydraulic phase adjustment device and at least one volume accumulator, wherein the phase adjustment device can form a drive connection with a crankshaft and a camshaft , and has at least one advance adjustment chamber and at least one lag adjustment chamber, the pressure medium can be delivered to the advance adjustment chamber and the lag adjustment chamber or output from the advance adjustment chamber and the lag adjustment chamber through the pressure medium pipeline, wherein, through the advance The pressure medium is delivered to the adjustment chamber, and the pressure medium flows out from the lag adjustment chamber at the same time, so that the phase position of the camshaft relative to the crankshaft can be adjusted in the direction of the advanced valve timing. Outflow of pressure medium enables adjustment of the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L1/344
CPCF01L2001/0475F01L1/3442F01L2001/34446F01L1/34409F01L2001/34433F01L2001/34426F01L1/344F01L1/047
Inventor 约亨·奥克特卢茨·维特赫夫特于尔根·普拉特
Owner SCHAEFFLER TECH AG & CO KG
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