Patent ID: 9221465
Filing Date: 2015-12-29
Classification: B60W,F02D

Abstract:
1. A method, comprising: determining, at a controller of a vehicle, the controller including one or more processors, a wheel speed for each of two front wheels of the vehicle and two rear wheels of the vehicle; calculating, at the controller, a difference between (i) an average of the wheel speeds for the two front wheels of the vehicle and (ii) an average of the wheel speeds for the two rear wheels of the vehicle to obtain an error; setting, at the controller, a rough road detection bit when the error is greater than or equal to a threshold indicative of an error corresponding to rough road; monitoring, at the controller, the rough road detection bit for a period to obtain a hysteresis band; and based on the hysteresis band, determining, at the controller, whether (i) the vehicle is traveling on rough road or (ii) an engine of the vehicle has misfired.