Device for detecting the reverse rotation of a rotating part of an internal combustion engine
US6578550B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 2001 |
| Grant date | Jun 17, 2003 |
| Priority date | — |
| Expiry date | Jul 14, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a device for detecting the reverse rotation of a rotating part of an internal combustion engine, having a crankshaft (3) whose rotation, by means of a sensor (6) and a detector disk (2) which is connected to the crankshaft (3) and has a reference mark (5) and a multitude of similar angle marks (4), are sent by the sensor (6) to a control unit (1) in the form of pulses, having a camshaft (7) whose rotation is detected by means of an absolute angle detector (8), wherein the output signal of the absolute angle detector (8) steadily rises or falls within a period depending on the rotation direction of the camshaft 7. The output signal of the absolute angle detector (8) is supplied to the control unit (1) for processing. In order to detect reverse rotation of the internal combustion engine, three successive angle values &phgr;(k−2), &phgr;(k−1), &phgr;(k), are scanned from the output signal of the absolute angle detector (8) and are compared to one another in an algorithm in such a way that in the event of a malfunction with reverse rotation, the equation: &phgr;(k)<&phgr;(k−1)<&phgr;(k−2) is true. If this condition is not fulfilled, no c…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.