US 11,208,972 B2 · Detection and control of intake system noise during low pressure exhaust gas recirculation operation

Abstract

Intake noise suppression techniques for a forced-induction engine having a low pressure exhaust gas recirculation (LPEGR) system configured to recirculate exhaust gas produced by the engine to an intake system of the engine via an EGR port comprise receiving, from a mass air flow (MAF) sensor of the engine, a MAF signal indicative of measured airflow through the intake system, detecting, based on the MAF signal, intake system conditions that are indicative of audible noise, and in response to detecting the detected intake system conditions that are indicative of audible noise, at least partially closing a differential pressure (dP) valve to mitigate or eliminate the intake system conditions and the corresponding audible noise, wherein the MAF sensor is disposed in the intake system upstream from the dP valve.

Claims16

Dependent claims

An intake noise suppression system for a forced-induction engine having a low pressure exhaust gas recirculation (LPEGR) system configured to recirculate exhaust gas produced by the engine to an intake system of the engine via an EGR port, the intake noise suppression system comprising:

a differential pressure (dP) valve disposed in the intake system upstream from the EGR port and configured to control a dP across an EGR valve of the LPEGR system;
a mass air flow (MAF) sensor disposed in the intake system upstream from the dP valve and configured to generate a MAF signal indicative of measured airflow through the intake system;
and a controller configured to:
based on the MAF signal, detect intake system conditions that are indicative of audible noise;
and in response to the detected intake system conditions that are indicative of audible noise, at least partially close the dP valve to mitigate or eliminate the intake system conditions and the corresponding audible noise.

2 more elements

An intake noise suppression method for a forced-induction engine having a low pressure exhaust gas recirculation (LPEGR) system configured to recirculate exhaust gas produced by the engine to an intake system of the engine via an EGR port, the method comprising:

receiving, by a controller of the engine and from a mass air flow (MAF) sensor of the engine, a MAF signal indicative of measured airflow through the intake system;
detecting, by the controller and based on the MAF signal, intake system conditions that are indicative of audible noise;
and in response to the detected intake system conditions that are indicative of audible noise, at least partially closing, by the controller, a differential pressure (dP) valve to mitigate or eliminate the intake system conditions and the corresponding audible noise, wherein the MAF sensor is disposed in the intake system upstream from the dP valve.

Dependencies are inferred from the claim text.

Detection and control of intake system noise during low pressure exhaust gas recirculation operation

Life of this patent

Detection and control of intake system noise during low pressure exhaust gas recirculation operation

Life of this patent

Abstract

Claims16