METHOD, SYSTEM, AND FUEL INJECTOR FOR MULTI-FUEL INJECTION WITH PRESSURE INTENSIFICATION AND A VARIABLE ORIFICE

摘要

A multi-fuel injector has an internal pressure intensifier which has means to intensify fuels with different viscosities, cetane or octane numbers, with high viscosity fuel being used to intensify itself and low viscosity fuels to high pressure for direct injection into combustion chamber. A fuel injection method and fuel system using such a method of fuel injection is disclosed. A multi-fuel injector with a variable orifice nozzle and variable spray patterns is also disclosed.

主权项

1. A fuel injection method, comprising steps of: (i) supplying a fuel injector with at least one low pressure fuel with low viscosity, (ii) using a pressurized fuel with high viscosity from a pressure reservoir to intensify said low viscosity fuel in an intensification chamber within the fuel injector through a pressure intensifier having piston surfaces facing high viscosity fuel and low viscosity fuel, (iii) directly injecting the intensified low viscosity and high viscosity fuels into a combustion chamber through the fuel injector.