Turbocharger Protection Device

• US 20100091817A1
• Filed: 01/30/2009
• Published: 04/15/2010
• Est. Priority Date: 03/01/2007
• Status: Active Grant

• Current Assignee: Heraeus Nexensos GmbH (Yageo Corporation)
• Original Assignee: Heraeus Sensor Technology GmbH (Heraeus Holding GMBH)
• Inventors: Loose, Thomas, Bachmann, Mario, Wienand, Karlheinz, Muziol, Matthias
• Granted Patent: US 8,328,419 B2
• Time in Patent Office: Days
• US Class Current: 374/185
• CPC Class Codes: G01K 1/12 for preventing damage due to heat overloading
• CPC Class Codes: G01K 2205/02 for measuring inlet gas temperature
• CPC Class Codes: G01K 7/16 using resistive elements resistive elements per se H01C, H01L
• CPC Class Codes: Y10T 29/49124 On flat or curved insulated base, e.g., printed circuit, etc.

Abstract

A temperature sensor, particularly a high-temperature sensor, is provided in which an MI line or a heat-decoupling wire is arranged between the measurement resistor (chip) and the supply-line cable. Springs are stuck on the strands of the MI line, whereby the contacting to the measurement resistor is realized, or the heat-decoupling wire is stretched on one side to the end facing the measurement resistor and is connected elastically on the other end to the supply-line cable.

Claims

1-11. -11. (canceled)

12. A temperature sensor, particularly a high-temperature sensor, comprising a two-stranded, mineral-insulated supply line arranged between a supply-line cable and a measurement unit of a measurement resistor, the measurement resistor being in a form of a chip or an NTC thermistor, strands projecting out of insulation of the supply line at an end facing the measurement resistor being respectively connected electrically and mechanically to one end of a spring, with one of the springs on each of the extending strands, and the springs being connected electrically and mechanically at their other end to the measurement resistor or to a connection wire of the measurement resistor.

16. The temperature sensor according to claim 12, wherein the measurement resistor is connected with two bonding wires containing noble metal to the springs or strands.

18. The temperature sensor according to claim 16, wherein the bonding wires are made of platinum or platinum-rhodium alloy.

20. The temperature sensor according to claim 12, wherein the at least one strand is composed of an iron-aluminum-chromium alloy.

22. The temperature sensor according to claim 20, wherein the at least one strand comprises 50 to 80 wt. % iron, 15 to 40 wt. % aluminum, and 5 to 30 wt. % chromium.

13. A temperature sensor, particularly a high-temperature sensor, comprising a heat-decoupling wire arranged between a measurement resistor in a form of a chip and a supply-line cable, wherein the heat-decoupling wire is stretched on one side at one end facing the measurement resistor and is connected elastically to the supply-line cable at the other end.

14. The temperature sensor according to claim 13, wherein two heat-decoupling wires are each stretched on one end and the elastic connection at the other end comprises a spring on each strand of the supply-line cable.

15. The temperature sensor according to claim 13, wherein the heat-decoupling wires are guided in a ceramic capillary tube over 50% of their length.

17. The temperature sensor according to claim 13, wherein the measurement resistor is connected with two bonding wires containing noble metal to the heat-decoupling wires.

19. The temperature sensor according to claim 17, wherein the bonding wires are made of platinum or platinum-rhodium alloy.

21. The temperature sensor according to claim 13, wherein the at least one heat-decoupling wire is composed of an iron-aluminum-chromium alloy.

23. The temperature sensor according to claim 21, wherein the at least one heat-decoupling wire comprises 50 to 80 wt. % iron, 15 to 40 wt. % aluminum, and 5 to 30 wt. % chromium.

24. A high-temperature sensor element for a turbocharger-overheating protection device, the sensor element comprising a chip fired in a casting compound within a jacket tube and connected elastically with bonding wires to strands of a mineral-insulated supply line, which lead out of the casting compound, wherein the bonding wires are wound elastically around the strands.

25. A high-temperature sensor element for a turbocharger-overheating protection device, the sensor element comprising a chip fired in a casting compound within a jacket tube and connected elastically with bonding wires to heat-decoupling wires, which lead out of the casting compound, wherein the heat-decoupling wires are essentially surrounded by a ceramic capillary tube and are connected to spiral-shaped connection cables at their end opposite the chip.

26. A turbocharger overheating protection device, comprising a high-temperature sensor element for a temperature range of −

40°

C. to 1200°

C., the high-temperature sensor element comprising a chip (1) made of a platinum thin-film measurement resistor on an electrically insulating oxide substrate, which is embedded in a ceramic casting compound (2) and is connected electrically with spring-shaped bonding wires (3) to strands, which lead out of the casting compound (2), wherein the bonding wires are wound elastically around the strands.

27. A turbocharger overheating protection device, comprising a high-temperature sensor element for a temperature range of −

40°

C. to 1200°

C., the high-temperature sensor element comprising a chip (1) made of a platinum thin-film measurement resistor on an electrically insulating oxide substrate, which is embedded in a ceramic casting compound (2) and is connected electrically with spring-shaped bonding wires (3) to heat-decoupling wires (4), which lead out of the casting compound (2), wherein the heat-decoupling wires (4) are surrounded essentially by a ceramic capillary tube (5) and are connected to spiral-shaped connection cables (6) at their end opposite the chip.

28. A method for the production of a high-temperature sensor element for a turbocharger overheating protection device, the method comprising firing a chip in a casting compound within a jacket tube, and elastically connecting the chip with bonding wires to strands, which lead out of the casting compound, wherein the bonding wires are wound elastically around the strands.

29. A method for the production of a high-temperature sensor element for a turbocharger overheating protection device, the method comprising firing a chip in a casting compound within a jacket tube, and elastically connecting the chip with bonding wires to heat-decoupling wires, which lead out of the casting compound, wherein the heat-decoupling wires are essentially surrounded by a ceramic capillary tube and are connected to spiral-shaped connection cables at their end opposite the chip.