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Fluid sensor device

A fluid sensor and fluid technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problem of unprotected electrodes, and achieve the effect of simple structure and easy installation

Inactive Publication Date: 2010-03-24
ROBERT BOSCH GMBH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such a solution is also unsuitable for automotive applications because the electrodes are not protected

Method used

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Examples

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Embodiment approach 1

[0035] As in the second embodiment, the capacitor plates 8a", 8b" are arranged inside the casing 5", and also extend tangentially to the curvature of the cavity. In this embodiment, however, not the entire transverse direction of the fuel 30 The cross-section is between the capacitor plates 8a", 8b", but roughly two-thirds of the cross-section. This is due to the semi-cylindrical shell shape of the housing, but does not affect the quality of the measurement signal.

[0036] The projection 55 with the integrated evaluation circuit 40 and the plug device 45 arranged thereon is identical to that of the embodiment already described above.

[0037] Figure 4A schematic cross-sectional view of a fluid sensor device according to a fourth embodiment of the present invention is shown.

[0038] The fluid sensor device 1"' according to the fourth embodiment also has a housing 5"' in the form of a semi-cylindrical shell. It differs only from the third embodiment in that the capacitor pl...

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Abstract

The invention provides a fluid sensor device (1; 1'; 1'; 1'') for detecting a dielectricity constant of a fluid (30) present in a fluid line (20), comprising a housing (5; 5'; 5'; 5''); a plate capacitor device provided on the inside of the housing (5; 5'; 5'; 5''), the plate capacitor device comprising a first and a second capacitor plate (8a, 8b; 8a', 8b'; 8a', 8b'; 8a'', 8b''); wherein the housing (5; 5'; 5'; 5'') on the surface thereof has an arched attachment region for attaching the fluid line (20); and wherein the first and second capacitor plates (8a, 8b; 8a', 8b'; 8a', 8b'; 8a'', 8b'') are disposed next to the attachment region such that a fluid (30) present in the fluid line (20) attached in the attachment region is provided at least partially between the first and second capacitor plates (8a, 8b; 8a', 8b'; 8a', 8b'; 8a'', 8b'').

Description

technical field [0001] The invention relates to a fluid sensor device for detecting the dielectric constant of a fluid present in a fluid line. Background technique [0002] Although it can be used in any fluid sensor system, the invention and the problem of its use in motor vehicles will be described. [0003] There is a generally increasing need for on-line monitoring of fluids used in automobiles. In engine oils and hydraulic oils this type of monitoring allows for the optimization of oil changes. For fluids, such as fuel in automobiles, monitoring is mainly used to determine the composition or quality of the fuel as accurately as possible in order to optimize engine management, such as improving exhaust gas volume, improving engine power, etc. [0004] So far only in Brazil have ethanol and methanol been widely used as fuel additives for gasoline engines. The increasing shortage and rising price of gasoline, the possible dependence on oil exporting countries, the need...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/22G01N33/28
CPCG01N33/2852G01N27/226
Inventor U·凯斯M·谢勒G·克莱特M·尼曼
Owner ROBERT BOSCH GMBH
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