![]() ![]() Original Assignee Delphi Technologies Inc Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)ĭelphi International Operations Luxembourg SARL Inventor Louisa Perryman Daniel Hopley Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Withdrawn Application number EP09154081A Other languages German ( de) Google Patents Detection of faults in a piezo fuel injector arrangementĭownload PDF Info Publication number EP2113647A2 EP2113647A2 EP09154081A EP09154081A EP2113647A2 EP 2113647 A2 EP2113647 A2 EP 2113647A2 EP 09154081 A EP09154081 A EP 09154081A EP 09154081 A EP09154081 A EP 09154081A EP 2113647 A2 EP2113647 A2 EP 2113647A2 Authority EP European Patent Office Prior art keywords injector short circuit voltage current fuel Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents EP2113647A2 - Detection of faults in a piezo fuel injector arrangement So you can see it's a little bit different, but as long as you know the theory, it'll help you diagnose it.EP2113647A2 - Detection of faults in a piezo fuel injector arrangement So that goes around.Īnd then when it's released, we're still going to get another spike into the injector back into the line, when it closes. Then the amperage drops off slightly, and then it comes down and then as it says, it modulates the amperage up and down to keep the inject open.Īs the amperage goes up and down, the voltage has to follow that as well. You can see that we have a little voltage spike right there, and at the same time the spike goes up, we also have the amperage going up. This would be powering up the fuel injector. So let me stop it on this second pattern here. And you can see here we have two different types of patterns displayed. ![]() We're going to go into the lab scope, which I already have set up running on this vehicle. So now that I've got all this information here, they don't actually have a test that we can test all three things. It says the best place to test that is either at the injector itself on these, they're sometimes hard to get to or there's a 16 pin connector on the left rear side of the engine above the engine oil filter housing. It contains a smart driver that actually monitors each side to see whether there's a problem that will throw a code for whatever the problem happens to be.
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