Center feed of air for air assist fuel injector
AssigneeSiemens Canada Limited
InventorsDebora Nally, Henry C. Dozier
Life of this patent
Estimating the term…
Abstract
A manifold for a fuel injected engine has several fuel injectors that are connected to a common air assist passageway for each bank of cylinders. This passageway is preferably supplied with assist air from a central location, between two of the fuel injector pockets that intersect the air assist passageway in each bank of cylinders. This air assist passageway may be formed integral with a manifold, or may be separately formed together with the injector pockets as an air assist rail. The air assist passageway preferably intersects the center line of the fuel injector pockets and is formed by inserting pins that define the interior surface of the passageway into a mold cavity to intersect and pass through bosses that define the fuel injector pockets.
Claims21
An intake system for an internal combustion engine having at least one bank of cylinders adjacent to each other, the system comprising:
- a first plurality of air induction passageways coupable to the at least one bank of cylinders;
- a first plurality of fuel injector pockets, each fluidly coupled with one of the first plurality of air induction passageways;
- and
- a first air assist passageway fluidly coupled with the first plurality of fuel injector pockets to communicate assist air to each of the fuel injector pockets at all times during operation of the internal combustion engine, wherein the first air assist passageway has a first assist air feed port for receiving assist air and the first assist air port is disposed between at least two of the first plurality of fuel injector pockets.
An intake system for an internal combustion engine having at least one bank of cylinders adjacent to each other, the system comprising:
- a first plurality of air induction passageways couplable to the at least one bank of cylinders;
- a first plurality of fuel injector pockets, each fluidly coupled with one of the first plurality of air induction passageways;
- and
- a first air assist passageway fluidly coupled with the first plurality of fuel injector pockets to communicate assist air at a pressure greater than atmospheric pressure to each of the fuel injector pockets at all times during operation of the internal combustion engine, wherein each of the first plurality of fuel injector pockets has a central longitudinal axis, and further wherein the first air assist passageway intersects each of the central axes of the plurality of fuel injector pockets.
An intake system for an internal combustion engine having at least one bank of cylinders adjacent to each other, the system comprising:
- a first plurality of fuel injector pockets;
- and
- a first air assist passageway fluidly coupled between and integrally formed with each of the first plurality of fuel injector pockets;
- and
- an air assist port disposed in the air assist passageway to receive and transmit the assist air at a pressure greater than atmospheric pressure to the injector pockets at all times during the operation of the internal combustion engine, wherein each of the first plurality of fuel injector pockets has a central longitudinal axis, and further wherein the first air assist passageway intersects each of the central axes of the plurality of fuel injector pockets.
An intake system for an internal combustion engine having at least one bank of cylinders adjacent to each other, the system comprising:
- a first plurality of air induction passageways coupable to the at least one bank of cylinders;
- a first plurality of fuel injector pockets, each fluidly coupled with one of the first plurality of air induction passageways;
- a substantially linear first air assist passageway extending across the at least one bank of cylinders and fluidly coupled with the first plurality of fuel injector pockets to communicate assist air to each of the fuel injector pockets, wherein the first air assist passageway has a first assist air feed port for receiving assist air and the first assist air port is disposed between at least two of the first plurality of fuel injector pockets.
Dependencies are inferred from the claim text.