Patent ID: 9181844
Filing Date: 2015-11-10
Classification: F01N,Y02T

Abstract:
1. A system comprising: an actuator of an engine; a first electronic circuit configured to diagnose a fault in at least one of an oxygen sensor and a catalytic converter based on input received from the oxygen sensor; a second electronic circuit configured to disable the fault diagnosis based on a temperature of the catalytic converter and a mass flow rate of air flowing through the catalytic converter; a third electronic circuit configured to determine a total mass of air flowing through the catalytic converter by integrating multiple values of the mass flow rate of air flowing through the catalytic converter with respect to time, wherein the second electronic circuit is configured to disable the fault diagnosis based on the total mass of air flowing through the catalytic converter; and a fourth electronic circuit configured to adjust the actuator of the engine to adjust an amount of at least one of air and fuel provided to a cylinder of the engine, and thereby adjust an air/fuel ratio of the engine, based on the input received from the oxygen sensor.