| 发明名称 |
System and method for detecting short-to-ground fault |
| 摘要 |
A method of detecting a resistive short-to-ground fault in an injector driver circuit is disclosed. The method includes determining if the injector driver circuit is in an inactive state and providing a pull-up resistor configured for connection to a low-side output of at least one fuel injector. The method further includes selectively enabling a pull-up voltage across the pull-up resistor only when the injector driver circuit is in the inactive state and determining an intersection voltage at a point between the pull-up resistor and the low-side output. The method further includes comparing the intersection voltage with a predetermined reference voltage. The method further includes disabling the injector driver circuit if the short-to-ground fault is detected at the low-side of the fuel injectors. |
| 申请公布号 |
US9429126(B2) |
申请公布日期 |
2016.08.30 |
| 申请号 |
US201414296518 |
申请日期 |
2014.06.05 |
| 申请人 |
Caterpillar Inc. |
发明人 |
Hoban, Jr. William E.;Girijakumari Sreekumar Regu |
| 分类号 |
F02M65/00;G01R31/00;G01R31/02;F02D41/22;F02D41/20 |
主分类号 |
F02M65/00 |
| 代理机构 |
|
代理人 |
Myers Carl E. |
| 主权项 |
1. A method of detecting a resistive short-to-ground fault in an injector driver circuit, the method comprising:
determining if the injector driver circuit is in an inactive state; providing a pull-up resistor configured for connection to a low-side output of at least one fuel injector; selectively enabling a pull-up voltage across the pull-up resistor only when the injector driver circuit is in the inactive state; determining an intersection voltage at a point between the pull-up resistor and the low-side output; and comparing the intersection voltage with a predetermined reference voltage. |
| 地址 |
Peoria IL US |
