| 发明名称 | Method for measuring the electrical resistance of a glow plug | ||
| 摘要 | The invention relates to a method for measuring the electrical resistance of a glow plug, wherein a test current is set by closed-loop control to a constant value using a constant-current source, and is directed through the plug. A value of the electrical resistance of the glow plug is determined by evaluating a feedback signal of the constant-current source. | ||
| 申请公布号 | US9007076(B2) | 申请公布日期 | 2015.04.14 |
| 申请号 | US201213455384 | 申请日期 | 2012.04.25 |
| 申请人 | BorgWarner BERU Systems GmbH | 发明人 | Schaefer Peter |
| 分类号 | G01R27/08;G01R27/14;F02P19/02;F02D35/02 | 主分类号 | G01R27/08 |
| 代理机构 | Hackler Daghighian & Martino | 代理人 | Hackler Daghighian & Martino |
| 主权项 | 1. A method for determining the electrical resistance of a glow plug, wherein a test current is set by closed-loop control to a constant value using a constant-current source and is directed through a glow plug circuit to the glow plug, and wherein a feedback signal of the constant-current source is evaluated in order to determine a value of the electrical resistance of the glow plug, where the feedback signal goes through a feedback signal circuit connected to the constant-current source but where the feedback signal circuit does not contain the glow plug, wherein the feedback signal is evaluated by linking it to a voltage signal that is measured between the constant-current source and the glow plug with respect to a reference potential where the reference potential is a ground potential, and wherein the linking is done by a differential amplifier to which the feedback signal and the voltage signal measured between the constant-current source and the glow plug are fed. | ||
| 地址 | Ludwigsburg DE | ||