US Patent 7770813 Spray penetration control method

A spray penetration control method that controls penetration of fluid injected as a spray from an injector. The control method uses multiple successive injection events instead of single injection events to reduce overall spray penetration. Dwell times may be fixed or varied between successive injection events to reduce overall spray penetration. Also, the mass of fluid spray injected by the injector may be fixed or varied during each multiple successive injection event to reduce overall spray penetration and the number of successive injection events may be adjusted so that a desired total amount of mass is delivered in accordance with a desired penetration.