Patent Number: 6,305,352

Title: Method for detecting an abnormal disturbance of an internal combustion engine torque

Abstract: A method for detecting an abnormal disturbance of an internal combustion engine torque and for suspending the functioning of a system in which combustion misfiring has been diagnosed. The method operates by analysis of values of a quantity representing the quality of combustion by observing engine crank shaft rotation. A stability criterion is defined of the quantity for each of the engine cylinders. Then, after each combustion the stability criterion is compared with a predetermined threshold, and an abnormal torque disturbance is detected when the stability criterion is greater than the threshold for a given number of consecutive times for at least one cylinder.

Inventors: Dony; Guillaume (Arpajon, FR)

Assignee: Renault

International Classification: G01M 15/11 (20060101); G01M 15/04 (20060101); G01M 015/00 ()

Expiration Date: 10/23/2018