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US 7,198,027 B1Granted
Low speed combustion air bypass tube
AssigneeBRP US Inc.
InventorsEvelyn A. Breznik, Peter E. Lucier, Mark C. Noble
Life of this patent
Estimating the term…
Abstract
An air intake assembly having a bypass and method of operating an engine are disclosed. The air intake assembly has a first opening having a throttle plate disposed in the opening and configured to control the passage of combustion gas through the opening. A second opening is vented to atmosphere and configured to pass combustion gas through the second opening.
Claims46
An internal combustion engine comprising:
- an engine having at least one cylinder formed therein;
- a throttle body attached to the engine;
- a first passage having a valve therein and configured to have a variable cross-section;
- and
- a second passage vented to atmosphere and having a fixed cross-section, the second passage including a tube and the fixed cross-section varies along a length of the tube,
- the tube having a first section with an outer diameter that is less than a diameter of the second passage, a second section having an outer diameter that substantially matches the diameter of the second passage, and a third section having an outer diameter that is larger than the diameter of the second passage.
3 more elements
A throttle body for an engine comprising:
- a housing;
- a chamber located in the housing;
- a first inlet in fluid communication with a first side of the chamber;
- a throttle plate located in the first inlet;
- a second inlet in fluid communication with a second side of the chamber opposite the first side and having an opening into the chamber facing the throttle valve when the throttle valve is closed;
- and
- an outlet in fluid communication with the chamber.
4 more elements
An internal combustion engine comprising:
- an engine body;
- at least one cylinder formed in the engine body;
- a throttle body attached to the engine body and having a first and a second throttle body inlet;
- a chamber located in the throttle body;
- the first throttle body inlet facing away from the engine and in fluid communication with the chamber;
- the second throttle body inlet having an opening to an ambient environment facing towards the engine body and in fluid communication with the chamber;
- a throttle plate located in the first throttle body inlet;
- and
- a throttle body outlet fluidly communicating the chamber with the engine body.
6 more elements
An internal combustion engine assembly, comprising:
- an internal combustion engine;
- a throttle body associated with the engine, the throttle body having
- a first air passageway for supplying air to the engine, the first air passageway having a throttle valve therein;
- and
- a second air passageway for supplying air to the engine, the second air passageway having an inlet facing the engine and in communication with an ambient environment other than via the first passageway, and an outlet in communication with the first passageway downstream of the throttle valve.
2 more elements
Dependencies are inferred from the claim text.