Methods for measuring fuel quantity during multipulse fuel injection events in a common rail fuel system
US-2024084757-A1 · Mar 14, 2024 · US
Method for determining the injection law of a fuel injector using a roller-test bench
US9212640B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9212640-B2 |
| Application number | US-201113293793-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 10, 2011 |
| Priority date | Nov 10, 2010 |
| Publication date | Dec 15, 2015 |
| Grant date | Dec 15, 2015 |
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Abstract
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A method determines an injection law of a fuel injector to be tested in an injection system and includes steps of: completely interrupting feeding of fuel from a fuel pump to a common rail; avoiding opening of all injectors except for one to be tested; measuring initial pressure of the fuel inside the rail before starting the opening of the injector; opening the injector for consecutive openings with a same test-actuation time; measuring final pressure after ending the opening; determining a pressure drop in the rail during the opening (equal to a difference between the initial and final pressures); estimating, according to the pressure drop, a fuel quantity that is actually injected by the injector when the injector is opened for the time; and causing an internal-combustion engine using the system to rotate by an external actuator during the openings to allow execution of consecutive openings with the same time.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for determining an injection law of a fuel injector ( 4 ) to be tested in an injection system ( 3 ) that includes a plurality of fuel injectors ( 4 ), a common rail ( 5 ) feeding fuel under pressure to the injectors ( 4 ), and a fuel pump ( 6 ) that keeps the fuel under pressure inside the common rail ( 5 ), said method being performed by an engine control unit and comprising the steps of: completely interrupting the feeding of the fuel from the fue…
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Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
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Frequently asked questions
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- What does patent US9212640B2 cover?
- A method determines an injection law of a fuel injector to be tested in an injection system and includes steps of: completely interrupting feeding of fuel from a fuel pump to a common rail; avoiding opening of all injectors except for one to be tested; measuring initial pressure of the fuel inside the rail before starting the opening of the injector; opening the injector for consecutive opening…
- Who is the assignee on this patent?
- Serra Gabriele, Parotto Marco, Magneti Marelli Spa
- What technology area does this patent fall under?
- Primary CPC classification F02M65/003. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Dec 15 2015 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).