Static and dynamic pressure compensation for intake oxygen sensing
First Claim
1. An oxygen sensor pressure compensation system, comprisinga static pressure compensation module configured to (i) receive an oxygen sensor signal from an oxygen sensor and a pressure signal from a pressure sensor, (ii) retrieve a correction factor based on the pressure signal, and (iii) apply the correction factor to the oxygen sensor signal to generate a static pressure compensation signal, wherein the static pressure compensation signal corresponds to a static pressure as measured by the pressure sensor;
- a dynamic pressure compensation module configured to (i) receive the pressure signal, (ii) generate a dynamic pressure compensation signal based on the pressure signal, wherein the dynamic pressure compensation signal corresponds to a change in the pressure signal from a previously received pressure signal; and
a summing module to configured to combine the static pressure compensation signal and the dynamic pressure compensation signal to generate a compensated oxygen signal.
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Abstract
An oxygen sensor pressure compensation system includes a static pressure compensation module to receive an oxygen sensor signal from an oxygen sensor and a pressure signal from a pressure sensor and to perform static pressure compensation. A dynamic pressure compensation module receives the oxygen sensor signal and the pressure signal and to perform dynamic pressure compensation. A summing module generates a compensated oxygen signal based on the static pressure compensation and the dynamic pressure compensation.
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Citations
20 Claims
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1. An oxygen sensor pressure compensation system, comprising
a static pressure compensation module configured to (i) receive an oxygen sensor signal from an oxygen sensor and a pressure signal from a pressure sensor, (ii) retrieve a correction factor based on the pressure signal, and (iii) apply the correction factor to the oxygen sensor signal to generate a static pressure compensation signal, wherein the static pressure compensation signal corresponds to a static pressure as measured by the pressure sensor; -
a dynamic pressure compensation module configured to (i) receive the pressure signal, (ii) generate a dynamic pressure compensation signal based on the pressure signal, wherein the dynamic pressure compensation signal corresponds to a change in the pressure signal from a previously received pressure signal; and a summing module to configured to combine the static pressure compensation signal and the dynamic pressure compensation signal to generate a compensated oxygen signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method compensating an oxygen sensor for pressure variations, comprising
receiving an oxygen sensor signal from an oxygen sensor and a pressure signal from a pressure sensor; -
retrieving a correction factor based on the pressure signal; applying the correction factor to the oxygen sensor signal to generate a static pressure compensation signal, wherein the static pressure compensation signal corresponds to a static pressure as measured by the pressure sensor; generating a dynamic pressure compensation signal based on the pressure signal, wherein the dynamic pressure compensation signal corresponds to a change in the pressure signal from a previously received pressure signal; and combining the static pressure compensation signal and the dynamic pressure compensation signal to generate a compensated oxygen signal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification