During the liquid fuel mode of a dual fuel internal combustion engine (10), soot may deposit at the fuel injectors (30, 42) and may jam the fuel injector needle. In such case, the liquid fuel supply system (32) may not work properly. For evaluating the mec...

An object of the present invention is to properly and easily diagnose the rationality of an alcohol concentration sensor that measures the alcohol concentration of fuel used in an internal combustion engine. To achieve the above object, a rationality diagn...

Control systems comprising electronic control modules (104, 106) may be configured to control operation of a dual fuel internal combustion engine (1). In case of a failure of an electronic control module (104, 106), the dual fuel internal combustion engine...

A method for checking the accuracy of an oxygen sensor based determination of the alcohol content of the fuel of a flexible fueled vehicle. Following the addition of fuel to the flexible fueled vehicle two alcohol concentration possibilities are calculated...