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US 2006/0065225 A1Published application
Intake system for internal combustion engine
AssigneeKeihin Corporation
InventorTakayuki Shimatsu
Life of this patent
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Abstract
An intake manifold of an engine has a common pipe disposed downstream of a throttle valve, a plurality of first through fourth branch pipes connected to the common pipe, and a bypass pipe connected between the common pipe and the first through fourth branch pipes. The bypass pipe has a plurality of branches connected respectively to the first through fourth branch pipes. An amount of intake air flowing through the intake manifold is detected by an air flow meter disposed in the bypass pipe.
Claims8
An intake system for use in an internal combustion engine, comprising:
- an intake manifold connected to a main body of the internal combustion engine and a main intake passage defined therein;
- said intake manifold having a plurality of parallel branch pipes and a common pipe connected to said branch pipes;
- a throttle valve connected to said common pipe and openable and closable for regulating an amount of intake air drawn through said main intake passage into the internal combustion engine;
- and
- an injector for injecting an amount of fuel depending on the regulated amount of intake air drawn into the internal combustion engine,
- wherein said intake manifold further comprises an auxiliary intake passage disposed separately from said main intake passage and connected to at least one of said parallel branch pipes in fluid communication with said main intake passage, and an amount-of-air detector disposed in said auxiliary intake passage for detecting an amount of intake air drawn into the internal combustion engine.
3 more elements
Dependencies are inferred from the claim text.