Multi-layer piezoelectric element, and injection device and fuel injection system provided therewith for enhanced durability
US-9153769-B2 · Oct 6, 2015 · US
Fuel injection device having a needle position determination
US9856842B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9856842-B2 |
| Application number | US-201013514277-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 13, 2010 |
| Priority date | Dec 8, 2009 |
| Publication date | Jan 2, 2018 |
| Grant date | Jan 2, 2018 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A fuel injection device includes a nozzle needle, an actuator for actuating the nozzle needle, a force sensor for detecting a force applied by the actuator, and a control unit which is connected to the force sensor. The force sensor supplies signals to the control unit and the control unit is designed for determining a position of the nozzle needle and for precisely determining an injected fuel quantity, based on the supplied signal.
First claim
Opening claim text (preview).
What is claimed is: 1. A fuel injection device comprising: a nozzle needle; an actuator for actuating the nozzle needle, wherein the actuator is a magnetic actuator or a piezoelectric actuator; a force sensor for determining a force applied by the actuator; and a control unit connected to the force sensor, the force sensor supplying a force measurement signal to the control unit, the control unit using the force measurement signal to calculate a value of the position of the nozzle needle and using the calculated value to calculate an injected fuel quantity. 2. The fuel injection device according to claim 1 , wherein the force sensor is a piezoelectric sensor. 3. The fuel injection device according to claim 1 , wherein the actuator is a piezoelectric actuator. 4. The fuel injection device according to claim 1 , wherein the force sensor has a passage opening, the nozzle needle being guided through the passage opening, and the force sensor being connected to a restoring spring for resetting the actuator and detecting a restoring force provided by the restoring spring. 5. The fuel injection device according to claim 1 , wherein the force sensor is situated in a force flow between the actuator and the nozzle needle. 6. The fuel injection device according to claim 5 , wherein the force sensor is designed in disk form. 7. The fuel injection device according to claim 1 , wherein the force sensor contacts the actuator directly or the force sensor is integrated into the actuator.
Assignees
Inventors
Classifications
Measuring or detecting injection-valve lift, e.g. to determine injection timing · CPC title
the valves opening in direction of fuel flow {(F02M61/047 takes precedence)} · CPC title
- F02M51/0603Primary
using piezoelectric or magnetostrictive operating means · CPC title
the devices being sensors · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US9856842B2 cover?
- A fuel injection device includes a nozzle needle, an actuator for actuating the nozzle needle, a force sensor for detecting a force applied by the actuator, and a control unit which is connected to the force sensor. The force sensor supplies signals to the control unit and the control unit is designed for determining a position of the nozzle needle and for precisely determining an injected fuel…
- Who is the assignee on this patent?
- Wuerfel Gernot, Pietsch Ingo, Kerkamm Ingo, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification F02M51/0603. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Jan 02 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).