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Turbocharger comprising an actuator for opening and closing a wastegate duct

A technology of turbocharger and control device, applied in gas turbine device, valve device, exhaust gas recirculation and other directions, can solve the problems of intensified temperature, power density structure space problem, and the inability to realize compact package of turbocharger, etc. Achieving good sealing effect and preventing scratches

Active Publication Date: 2011-01-26
CONTINENTAL AUTOMOTIVE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned low power density poses difficulties above all due to the limited construction space in the engine compartment, which further exacerbates the temperature problem caused by the self-heating of the electric actuator
Compact packaging of turbochargers is not possible with hitherto known kinematics involving efficient electric actuators

Method used

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  • Turbocharger comprising an actuator for opening and closing a wastegate duct
  • Turbocharger comprising an actuator for opening and closing a wastegate duct
  • Turbocharger comprising an actuator for opening and closing a wastegate duct

Examples

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Embodiment Construction

[0035] In all figures, identical or functionally identical elements and arrangements are marked with the same reference signs unless otherwise stated.

[0036] figure 1 Firstly, a sectional view of a part of the turbine housing 10 and its wastegate channel 12 is shown, wherein the wastegate channel 12 is closed by means of a wastegate valve 14 according to the prior art.

[0037] The wastegate valve 14 is fastened here on a lever element 16 . The wastegate valve 14 is swung out or deflected by turning the lever element 16 . Various opening cross-sections of the wastegate duct 12 and thus the boost pressure can be controlled via the angle of rotation β of the wastegate valve 14 . In the closed state, a “face-to-face” seal is provided between wastegate channel 12 and wastegate valve 14 . This means that, in the closed state, the wastegate valve 14 rests flat on the end section 18 of the wastegate channel 12 and seals it off. The wastegate valve 14 here has a planar or plana...

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Abstract

The invention relates to a turbocharger comprising a wastegate duct (12) that can be opened and closed by means of an actuator. Said actuator encompasses a closing element (24) that can be swiveled into the wastegate duct to close the same, thus allowing the required closing force and hence also the size of the required actuator to be reduced.

Description

technical field [0001] The invention relates to a turbocharger having an actuating device for opening and closing a wastegate passage. Background technique [0002] The wastegate is opened and closed, the bypass valve of the turbine of the exhaust gas turbocharger, by means of a valve controlled by a pneumatic actuator. Adjustment by means of pneumatic actuators entails some drawbacks. These defects are, for example, chattering of the valve in the exhaust gas flow shortly before the valve opens and the consequent destruction of the valve seat. Furthermore, regulation by means of an overpressure sensor is only possible when sufficient boost pressure is present. [0003] For this reason, adjustment should be performed via an electric actuator. However, due to the lower power density of electric actuators compared to pressure sensors, the size of adjustment sensors has been significantly exceeded to date. [0004] The previous closing kinematics of wastegate valves involvin...

Claims

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Application Information

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IPC IPC(8): F02B37/18
CPCF02B37/183F16K1/2007F01D17/20F02C6/12F01D17/24F02M25/0793F05D2220/40Y02T10/144F16K1/20F02M26/70Y02T10/12
Inventor M·赫尔德曼R·贝宁H·克劳斯D·弗兰肯施泰恩H·费特S·克劳斯
Owner CONTINENTAL AUTOMOTIVE GMBH
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