Apparatus and method for injecting a pilot fuel into an internal combustion engine
AssigneeCespira Canada Limited Partnership
InventorJian Huang
Life of this patent
Estimating the term…
Abstract
An apparatus and method for injection of a pilot fuel and a gaseous fuel into an internal combustion engine, the method including injecting a quantity of pilot fuel, a quantity of pilot gaseous fuel and a main quantity of the gaseous fuel into the combustion chamber; igniting and burning the pilot fuel to create a pressure and temperature environment in the combustion chamber; igniting and burning the pilot quantity of the gaseous fuel due to the pressure and temperature environment in the combustion chamber due to the burning of the pilot fuel; and igniting and burning the main quantity of the gaseous fuel due to the pressure and temperature environment in the combustion chamber due to the burning of the pilot quantity of the gaseous fuel.
Claims20
A method of injecting a pilot fuel and a gaseous fuel into a combustion chamber of an internal combustion engine comprising
- injecting a quantity of the pilot fuel into the combustion chamber;
- injecting a pilot quantity of the gaseous fuel into the combustion chamber;
- injecting a main quantity of the gaseous fuel into the combustion chamber;
- igniting and burning the pilot fuel to create a pressure and temperature environment in the combustion chamber;
- igniting and burning the pilot quantity of the gaseous fuel due to the pressure and temperature environment in the combustion chamber due to the burning of the pilot fuel;
- and
- igniting and burning the main quantity of the gaseous fuel due to the pressure and temperature environment in the combustion chamber due to the burning of the pilot quantity of the gaseous fuel.
An apparatus for injecting a pilot fuel and a gaseous fuel into a combustion chamber of an internal combustion engine comprising
- a fuel injector comprising
- a nozzle;
- a main needle that is axially moveable within the nozzle;
- a pilot needle that is axially moveable within the main needle;
- a main injection valve between the nozzle and the main needle, the nozzle comprising a main gas hole downstream from the main injection valve and a pilot gas hole downstream from the main injection valve;
- and
- a pilot injection valve between the main needle and the pilot needle, the main needle comprising a pilot fuel hole downstream from the pilot injection valve.
Dependencies are inferred from the claim text.