Process and circuit for heating up a glow plug
US6635851B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 6, 2001 |
| Grant date | Oct 21, 2003 |
| Priority date | — |
| Expiry date | Jun 6, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02P19/028
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Process and circuit for heating up a glow plug of a given glow plug type in a given arrangement in an internal combustion engine to a predetermined temperature. The power supply voltage is on the glow plug via a measurement resistor (12) and a switch (11). A control and regulation unit (16) taps the voltage drop via the measurement resistor (12) and determines the heat energy supplied to the glow plug therefrom and from the likewise tapped voltage on the glow plug. The signal which occurs on the output (15) of the unit (16) controls the switch (11). After closing the switch (11) the unit (16) supplies the glow plug with heat energy which is added up in the unit (16). As soon as the heat energy which is required for heating up to a predetermined temperature and which is determined beforehand from the known parameters of the glow plug and from the starting temperature is reached, the switch is opened again via the output signal at the output (15).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.