Patent ID: 6293260
Filing Date: 2001-09-25
Classification: F02B,F02D,F02M,Y02T

Abstract:
A fuel vapor filter regeneration process for a direct injection engine of the type having:a plurality of cylinders supplied directly with fuel;a filter for collecting fuel vapors at a fuel tank; and a fuel vapor discharge line fitted with a fuel vapor discharge valve, and a pump associated with the line for discharging the fuel vapors stored in the filter and for conveying the fuel vapors towards the cylinders;the process which comprises, while the engine is operating on stratified charge, the following steps:opening the fuel vapor discharge valve when a degree of saturation of the filter exceeds a given threshold;allowing the fuel vapors to enter at least one of the cylinders but not simultaneously all of the cylinders; p2 cyclically determining the cylinder receiving the fuel vapors such that each cylinder of the plurality of cylinders receives fuel vapor in turn; andhomogeneously combusting the fuel vapors in the respective cylinder.