Procedure to recognize the diffusion gas composition in a wideband lambda sensor
First Claim
1. A method of recognizing a gas composition of a gas mixture of an exhaust gas of an internal combustion engine of a motor vehicle, which consists of at least two gases of preferably different diffusion properties, delivered to a wideband lambda sensor, wherein the lambda sensor has a pumping cell with at least one gas measurement chamber, the method comprising:
- chronologically modulating a Nernst voltage of the lambda sensor to infer the gas composition of the gas mixture delivered to the at least one gas measurement chamber.
1 Assignment
0 Petitions
Accused Products
Abstract
In a procedure to recognize the gas composition of a gas mixture, which consists of at least two gases of preferably different diffusion properties, delivered to a wideband lambda sensor, especially a gas mixture of an exhaust gas of an internal combustion engine of a motor vehicle, whereby the lambda sensor has a pumping cell with at least one gas measurement chamber, provision is made for the recognition of the gas composition of the gas mixture to result by means of modulation of the gas in the gas measurement chamber. Preferably the air number in the gas measurement chamber of the pumping cell is periodically altered, whereby the sensitivity of the lambda sensor to the gases, of which there are at least two, likewise periodically changes.
-
Citations
10 Claims
-
1. A method of recognizing a gas composition of a gas mixture of an exhaust gas of an internal combustion engine of a motor vehicle, which consists of at least two gases of preferably different diffusion properties, delivered to a wideband lambda sensor, wherein the lambda sensor has a pumping cell with at least one gas measurement chamber, the method comprising:
chronologically modulating a Nernst voltage of the lambda sensor to infer the gas composition of the gas mixture delivered to the at least one gas measurement chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- 9. A control unit to operate a wideband lambda sensor, characterized by a control program to determine a gas composition of a gas mixture of an exhaust gas of an internal combustion engine of a motor vehicle delivered to a wideband lambda sensor, wherein the lambda sensor has a pumping cell with at least one gas measurement chamber, wherein the control unit is configured to chronologically modulate a Nernst voltage of the lambda sensor to infer the gas composition of the gas mixture delivered to the at least one gas measurement chamber of the lambda sensor.
Specification