US Patent No: 7,822,537
Number of patents in Portfolio can not be more than 2000
Detection of faults in an injector arrangement
Stats
-
Oct 26, 2010
Issued date -
Nov 28, 2007
filing date -
11/998,012
serial no -
In Force
status
Importance
Loading Importance Indicators...
Abstract
A method of detecting faults in an injector arrangement in an engine. The injector arrangement comprises at least one fuel injector having a piezoelectric actuator, and the method comprises: charging the piezoelectric actuator during a charge phase (t.sub.C); attempting to recharge the piezoelectric actuator during a test phase (t.sub.T) which commences after a time interval (.DELTA.t) following the end of the charge phase (t.sub.C); sensing a current (I.sub.S) that flows through the piezoelectric actuator during the test phase (t.sub.T); and generating a short circuit fault signal if the sensed current (I.sub.S) reaches a first predetermined threshold current (I.sub.SC) which is indicative of a short circuit in the piezoelectric actuator.
Loading the Abstract Image...
First Claim
Related Publications
Loading Related Publications...
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
|
|
|||
| 7,640,918 Drive circuit for an injector arrangement and a diagnostic method | 3 | 2007 | |
| 2008/0006,246 Drive circuit for an injector arrangement and a diagnostic method | 3 | 2007 | |
| 2008/0319,699 Detection of faults in an injector arrangement | 2 | 2008 | |
| 2009/0093,944 Method of controlling fuel injection apparatus | 1 | 2008 | |
| 2009/0090,333 Injection control system | 2 | 2008 | |
| 2009/0121,724 Detection of faults in an injector arrangement | 1 | 2008 | |
|
|
|||
| 6,522,049 Apparatus and method for detecting a short circuit to the battery voltage when driving piezoelectric elements | 3 | 2001 | |
| 6,705,291 Fuel injection system | 11 | 2001 | |
|
|
|||
| 7,709,996 Method and device for controlling a capacitive load | 1 | 2006 | |
|
|
|||
| 2007/0080,606 Injector control method | 1 | 2006 | |
|
|
|||
| 6,384,512 Driving apparatus for piezo-actuator having abnormality detecting function | 10 | 2001 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Apr 26, 2014 |
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Apr 26, 2018 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Apr 26, 2022 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 3.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |