Dual mode fuel injector
AssigneeRicardo Consulting Engineers Limited
InventorChristopher Howard Best
Life of this patent
Estimating the term…
Abstract
A dual mode fuel injector having first (15) and second (30) valve members. The valve members are actuatable independently of one another and are arranged to open in opposite directions. The valve members control the flow through first (18) and second (29) orifices, one of which injects the fuel at a narrow angle with respect to the injector axis, and the other of which injects the fuel at a wider angle with respect to this axis.
Claims20
A dual mode fuel injector having a main axis and comprising a first fuel path and a first axially movable valve member for controlling the injection of fuel from the first fuel path through a first orifice;
- and a second fuel path and a second axially movable valve member within the first valve member for controlling the injection of fuel from the second fuel path through a second orifice wherein the first and second valve members are actuatable independently of one another and the second valve member is arranged to open in a direction opposite to the direction of the opening of the first valve member;
- and wherein the first orifice is arranged to direct fuel at a narrow angle with respect to the axis and the second orifice is arranged to direct fuel at a larger angle with respect to the axis.
An injector having a main axis and comprising;
- an engine management system for an engine having a plurality of pistons each having a piston bowl and being arranged to reciprocate in a respective cylinder, the system comprising a respective dual mode fuel injector associated with each piston, and a control system, the control system arranged to operate such that when a piston is towards the bottom of its stroke, a first charge of fuel is injected towards the piston bowl, and when the piston is towards the top of its stroke, a second charge of fuel is injected into the cylinder at a wider angle than the first charge of fuel, wherein the dual mode fuel injector has a main axis, a first fuel path and a first axially movable valve member for controlling the injection of fuel from the first fuel path through a first orifice;
- a second fuel path and a second axially movable valve member within the first valve member for controlling the injection of fuel from the second fuel path through a second orifice wherein the first and second valve members are actuatable independently of one another and the second valve member is arranged to open in a direction opposite to the direction of the opening of the first valve member;
- and wherein one orifice is arranged to direct fuel at a narrow angle with respect to the axis and the other orifice is arranged to direct fuel at a larger angle with respect to the axis.
Dependencies are inferred from the claim text.