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Apparatus and method for removing poison of lamda sensor

A sensor and predetermined value technology, applied in the direction of measuring devices, noise reduction devices, exhaust devices, etc., can solve problems such as poisoning, signal degradation, etc., and achieve the effect of accurate determination and suppression of degradation

Inactive Publication Date: 2017-03-29
HYUNDAI MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In this case, electrodes for measuring the oxygen concentration were provided inside the lambda sensor, however, we found that the electrodes of the lambda sensor were poisoned by various factors such as poisoning substances due to siloxane
If the electrodes of the lambda sensor are poisoned, the lambda signal output from the lambda sensor deteriorates

Method used

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  • Apparatus and method for removing poison of lamda sensor
  • Apparatus and method for removing poison of lamda sensor
  • Apparatus and method for removing poison of lamda sensor

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Embodiment Construction

[0046] The following description is merely exemplary in nature, and is not intended to limit the invention, application, or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features.

[0047] As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

[0048] Throughout the specification, the same reference numerals refer to the same elements.

[0049] For convenience of description, the size and thickness of structures shown in the drawings are selectively provided so that the present invention is not limited to those shown in the drawings, and the thicknesses are exaggerated to clarify some components and regions.

[0050] refer to figure 1and figure 2 , the device for removing the poisoning substance of the lambda sensor comprises lambda sensor 10, is used to det...

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Abstract

The invention relates to an apparatus and method for removing a poison of a lambda sensor. The apparatus includes: a lambda sensor detecting an oxygen concentration included in an exhaust gas; and a control unit differentiating a heating temperature and a heating time to remove poison from the lambda sensor depending on a lambda signal output from the lambda sensor when a heating condition of the lambda sensor and an overrun section of an engine are satisfied. By heating the lambda sensor depending on the magnitude of the lambda signal output from the lambda sensor, the lambda sensor may be inhibited from being degraded by combusting the material poisoned to the electrode of the lambda sensor and the failure of the lambda sensor may be correctly determined.

Description

technical field [0001] The invention relates to a device and a method for detoxifying a lambda sensor. Background technique [0002] The statements in this section merely provide background information related to the present invention and may not constitute prior art. [0003] Generally, a diesel engine has advantages in terms of fuel consumption and output torque, but has disadvantages in terms of exhaust gas. In other words, although a diesel engine produces less carbon monoxide CO and hydrocarbons HC, it produces more nitrogen oxides (commonly known as NOx) and particulate matter due to the high temperature of the combustion chamber caused by its high compression ratio. [0004] Typically, particulate matter can be reduced through combustion control, however, we have found a dilemma that an emission control scheme for reducing NOx results in an increase in particulate matter, while an emission control scheme for reducing particulate matter results in an increase in NOx ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/407
CPCG01N27/4077F01N9/00F01N13/008F01N2560/025F01N2560/20F01N2900/0416Y02T10/40
Inventor 张和镕
Owner HYUNDAI MOTOR CO LTD
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