Patent ID: 7983834
Filing Date: 2011-07-19
Classification: F02D,F02M

Abstract:
1. A method for detecting an error in a mass flow system of an internal combustion engine, the internal combustion engine having at least one mass flow line, a cooling device adapted to cool a mass flow in the mass flow line, a bypass that bypasses the cooling device, and a bypass valve, the mass flow being conducted at least partly through the bypass when the bypass valve is open, and the mass flow being conducted through the cooling device when the bypass valve is closed, the method comprising: determining a temperature of the mass flow in the mass flow line downstream from the cooling device and from the bypass in the mass flow line; determining in at least one operating state of the internal combustion engine a first temporal temperature gradient with the bypass valve closed; determining in the at least one operating state of the internal combustion engine a second temporal temperature gradient with the bypass valve in an open position; and detecting an error as a function of a deviation between the first temporal temperature gradient and the second temporal temperature gradient.