Circuit arrangement for an electric seat heating means
US8870451B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 13, 2012 |
| Grant date | Oct 28, 2014 |
| Priority date | — |
| Expiry date | Feb 13, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B1/0238
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electrical seat heater of a vehicle has a heating resistor which is connected to a seat ground cable has a temperature-dependent sensor resistor in the vehicle seat. A control unit is outside the vehicle seat is connected to a control unit ground remotely from the vehicle seat. The voltage measurement for determining the temperature is carried out with the seat heater briefly disconnected from the supply voltage. The heating resistor is connected to the supply voltage via a series circuit including the sensor resistor and a further resistor or to the supply voltage via a power path. The control unit measures the voltage drop at the sensor resistor by a measuring signal cable. The control unit measures the potential difference between the seat ground cable and the control unit ground, which is used to correct the seat temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.