Rotational generation type wireless oxygen sensor

• US 8,073,612 B2
• Filed: 02/06/2009
• Issued: 12/06/2011
• Est. Priority Date: 02/06/2009
• Status: Expired due to Fees

• Current Assignee: Denso International America Incorporated (DENSO Corporation)
• Original Assignee: Denso International America Incorporated (DENSO Corporation)
• Inventors: Powell, Patrick
• Primary Examiner(s): Kwon, John T.
• Assistant Examiner(s): HOANG, JOHNNY H
• Application Number:
  US12/366,896
• Publication Number:
  US 20100199637A1
• Time in Patent Office: 1,033 Days
• Field of Search: 701/109, 701/115, 701/1, 701/2, 701/31, 701/32, 701/51, 123/672, 60274-278, 602/84, 602/85, 731/147.2, 731/147.3, 204/406, 204/424, 204/426, 204/431, 455/419, 455/420
• US Class Current: 701/109
• CPC Class Codes: F02D 41/1454 the characteristics being an oxygen content or concentration or the air-fuel ratio
• CPC Class Codes: F03D 9/25 the apparatus being an electrical generator F03D9/22 takes precedence
• CPC Class Codes: F05B 2220/602 with energy recovery turbines
• CPC Class Codes: G01N 27/407 for investigating or analysing gases G01N27/411 takes precedence
• CPC Class Codes: Y02E 10/72 Wind turbines with rotation axis in wind direction

Abstract

An oxygen sensor for a motor vehicle having an electrode within an outer shell measures oxygen in exhaust gas exiting the vehicle and generates a signal based on the oxygen measurement. A communication device, powered by a battery or capacitor, wirelessly transmits the measured amount of oxygen from the electrode to a powertrain control module. The flow of exhaust gas through the exhaust system spins blades to spin a generator in a rotational power generation device to generate electrical current to be stored and used by the battery or capacitor. The rotational power generation device may be located in the exhaust pipe, such as through an exhaust pipe wall, and either be connected to the oxygen sensor shell or separate and connected only with electrical wires between the generator and the battery or capacitor.

Claims

1. An apparatus utilizing an oxygen sensor in an exhaust system of a motor vehicle, the apparatus comprising:

an outer shell;

an electrode disposed in the outer shell, the electrode measuring an amount of oxygen in an exhaust gas passing through a tail pipe of the motor vehicle and generating a signal based on the measured amount of oxygen;

a first wireless communication device disposed within the outer shell wirelessly transmitting the signal from the electrode;

an integrated circuit chip controlling functions of the oxygen sensor; and

a power-storing device within the outer shell providing power to at least the first wireless communication device and the integrated circuit chip.

2. The apparatus of claim 1, further comprising:

a rotational power generation device disposed in the tail pipe, the power generation device for supplying electrical power to the power-storing device.

3. The apparatus of claim 2, further comprising:

an electrical generator as part of the rotational power generation device, wherein the electrical generator is rotatably driven by the exhaust gas and the rotation generates an electrical current for storage in the power-storing device.

4. The apparatus of claim 3, wherein the rotational power generation device is connected to the oxygen sensor.

5. The apparatus of claim 3, wherein the rotational power generation device is not connected to the oxygen sensor and is connected to the tail pipe.

6. The apparatus of claim 3, further comprising:

a heating element, wherein the rotational power generation device supplies electrical power directly to the heating element.

7. The apparatus of claim 1, further comprising:

a vehicle powertrain control module; and

a second wireless communication device in the powertrain control module wirelessly receiving the signal from the communication device.

8. The apparatus of claim 7, wherein the second wireless communication device may transmit a command that is receivable by the first wireless communication device.

9. The apparatus of claim 8, wherein the measured amount of oxygen reacts with the electrode to generate the signal and the signal is one of a voltage and a resistance.

10. An apparatus utilizing an oxygen sensor in an exhaust system of a motor vehicle, the apparatus comprising:

an outer shell;

an electrode disposed in the outer shell, the electrode measuring an amount of oxygen in an exhaust gas passing through a tail pipe of the motor vehicle and generating a signal based on the measured amount of oxygen;

a first wireless communication device disposed within the outer shell wirelessly transmitting the signal from the electrode;

an integrated circuit chip controlling functions of the oxygen sensor;

a power-storing device within the outer shell providing power to at least the first wireless communication device and the integrated circuit chip; and

a rotational power generation device positioned through a wall of the tail pipe and exposed to an interior volume of the tail pipe, the rotational power generation device for generating and supplying electrical power to the power-storing device.

11. The apparatus of claim 10, wherein the rotational power generation device is connected to the oxygen sensor.

12. The apparatus of claim 10, wherein the rotational power generation device is physically separate from the oxygen sensor and connected to the tail pipe wall.

13. The apparatus of claim 10, further comprising:

a heating element, wherein the rotational power generation device supplies electrical power directly to the heating element.

14. The apparatus of claim 13, further comprising:

a vehicle powertrain control module; and

a second wireless communication device in the powertrain control module for wirelessly receiving the signal from the communication device.

15. The apparatus of claim 14, wherein the second wireless communication device may transmit a command that is receivable by the first wireless communication device in the oxygen sensor.

16. The apparatus of claim 15, wherein the measured amount of oxygen reacts with the electrode to generate the signal and the signal is one of a voltage and a resistance.

17. The apparatus of claim 16, wherein the power-storing device is a capacitor.

18. The apparatus of claim 17, wherein the power-storing device is a battery.

19. An apparatus utilizing an oxygen sensor in an exhaust system of a motor vehicle, the apparatus comprising:

an outer shell;

an electrode disposed in the outer shell, the electrode measuring an amount of oxygen in an exhaust gas passing through a tail pipe of the motor vehicle and generating a signal based on the measured amount of oxygen;

a first wireless communication device disposed within the outer shell wirelessly transmitting the signal from the electrode;

an integrated circuit chip controlling functions of the oxygen sensor; and

a power generation device comprising;

a plurality of blades that rotate to turn an electrical generator, the power generator device positioned through a wall of the tail pipe and exposed to an interior volume of the tail pipe, the power generation device generating and supplying electrical power to the power-storing device.

20. The apparatus of claim 19, further comprising:

a power-storing device within the outer shell providing power to at least the first wireless communication device and the integrated circuit chip, wherein the power generation device is connected to the oxygen sensor.