Fuel injection valve
AssigneeDenso Corporation
InventorsJun Kondo, Tomiko Fujino, Hiroshi Tsuda, Yutaka Miyamoto
Life of this patent
Estimating the term…
Abstract
A stem is installed to an injector body and is resiliently deformable upon receiving a pressure of high pressure fuel conducted through a high pressure passage of the injector body. A strain gauge is installed to the stem to sense a strain generated in the stem. A molded IC device executes an amplifying operation, which amplifies a signal received from the strain gauge. The stem, the strain gauge and the molded IC device are integrally assembled together to form a fuel pressure sensing unit, which is installed to the injector body by threadably fastening a threaded portion, which is formed at the stem, to the injector body.
Claims6
A fuel injection valve being adapted to be installed to an internal combustion engine and having an injection hole to inject fuel therethrough, the fuel injection valve comprising:
- a body that includes a high pressure passage, which is adapted to conduct high pressure fuel toward the injection hole;
- a flexure element that is installed to the body and is resiliently deformable upon receiving a pressure of the high pressure fuel conducted through the high pressure passage;
- a sensor element that is installed to the flexure element to sense a strain generated in the flexure element, wherein the sensor element converts the sensed strain into a corresponding electrical signal;
- and
- a signal processing circuit that executes at least an amplifying operation, which amplifies the signal received from the sensor element, wherein:
- the flexure element, the sensor element and the signal processing circuit are integrally assembled together to form a fuel pressure sensing unit;
- and
- the fuel pressure sensing unit is installed to the body by threadably fastening a threaded portion, which is formed at the flexure element, to the body.
Dependencies are inferred from the claim text.