Patent ID: 6640785
Filing Date: 2003-11-04
Classification: F02B,F02D,F02M,Y02T

Abstract:
A method to control fuel injection in an internal combustion engine comprising the steps of:(a) providing at least one intake pipe with at least one intake valve, a first injection and a second injector, the first injector in the intake pipe arranged significantly upstream of the second injector in a direction flow of air in the at least one intake pipe, the second injector is arranged close to the intake valve in the intake pipe; (b) providing a first injection of fuel from the first injector in order to obtain a well prepared fuel/air mixture early in a working cycle of the engine following closure of the at least one intake valve, the first injection of fuel is principally used for injection along the direction of flow of the air towards the at least one intake valve of an amount of fuel that corresponds to stationary conditions; and (c) providing a second injection of fuel from the second injector in order to obtain an optimal amount of fuel late in the working cycle before closure of the at least one intake valve, the second injection of fuel is injected directly towards the at least one intake valve when open, whereby the second injection of fuel is principally used for supply of fuel during transient conditions and a difference in transport time for fuel from the first and second injectors to the at least one intake valve is achieved.