Fuel sensor for sensing the mixture ratio of gasoline and methanol
First Claim
1. A fuel sensor for sensing a mixing ratio of a mixed fuel, said fuel sensor comprising:
- a housing;
a structure disposed in said housing, said structure having a fuel passage formed therethrough;
an electrode assembly disposed in said housing and held by said structure, said electrode assembly including paired electrodes which have respective probe portions exposed to said fuel passage;
an integrated circuit board on which an output control circuit is disposed, said output control circuit issuing an amplified voltage output which varies in accordance with a small information signal applied to an input portion of said output control circuit; and
at least two fastening screws connecting said integrated circuit board to said structure to form a tight mechanical connection therebetween said fastening screws constructed of electrically conductive material;
wherein said fastening screws have respective upper portions directly in contact with mutually insulated sections of said input portion of said output control circuit, and respective lower portions directly in contact with said paired electrodes respectively.
1 Assignment
0 Petitions
Accused Products
Abstract
A fuel sensor for sensing a mixing ratio of a given liquid in a mixed fuel comprises a housing; a structure housed in the housing, the structure having a fuel passage formed therethrough; and an electrode assembly housed in the housing and held by the structure, the electrode assembly including at least one pair of probe portions which are exposed to the fuel passage. The full sensor also includes an output control circuit housed in the housing, the output control circuit issuing an amplified voltage output which varies in accordance with a small information signal applied to an input portion of the output control circuit; and an electrically conducting member housed in the housing and electrically connecting the electrode assembly to the input portion of the output control circuit, so that the output control circuit issues an amplified voltage output which varies in accordance with a capacitance established between the paired probe portions.
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Citations
8 Claims
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1. A fuel sensor for sensing a mixing ratio of a mixed fuel, said fuel sensor comprising:
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a housing; a structure disposed in said housing, said structure having a fuel passage formed therethrough; an electrode assembly disposed in said housing and held by said structure, said electrode assembly including paired electrodes which have respective probe portions exposed to said fuel passage; an integrated circuit board on which an output control circuit is disposed, said output control circuit issuing an amplified voltage output which varies in accordance with a small information signal applied to an input portion of said output control circuit; and at least two fastening screws connecting said integrated circuit board to said structure to form a tight mechanical connection therebetween said fastening screws constructed of electrically conductive material; wherein said fastening screws have respective upper portions directly in contact with mutually insulated sections of said input portion of said output control circuit, and respective lower portions directly in contact with said paired electrodes respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification