Intake system for an internal combustion engine
AssigneeNissan Motor Co., Ltd.
InventorsTsuneyasu Nohara, Shinichi Takemura, Takanobu Sugiyama
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Abstract
An intake system for an internal combustion engine is provided which comprises a variable valve control apparatus capable of variably and continuously controlling the amount of intake air of an internal combustion engine by varying valve lift characteristics of an intake valve, a collector fluidly connected with a plurality of intake passages for cylinders of the internal combustion engine, and a pressure control mechanism for producing within the collector a vacuum that increases with increase of one of the amount of intake air, engine speed and engine load of the internal combustion engine.
Claims20
An intake system for an internal combustion engine comprising:
- a variable valve control apparatus capable of variably and continuously controlling the amount of intake air of an internal combustion engine by varying valve lift characteristics of an intake valve;
- a collector fluidly connected with a plurality of intake passages for cylinders of the internal combustion engine;
- and
- a pressure control mechanism for producing within the collector a vacuum that increases with increase of one of the amount of intake air, engine speed and engine load of the internal combustion engine.
An internal combustion engine comprising:
- a variable valve control apparatus for variably controlling a valve lift, operation angle and maximum lift phase of an intake valve thereby variably controlling the amount of intake air supplied to cylinders in accordance with an engine operating condition;
- a collector in the form of a box;
- a plurality of intake passages fluidly connecting between the collector and the respective cylinders;
- and
- a pressure control mechanism for producing within the collector a vacuum that varies depending upon a variation of the engine operating condition.
Dependencies are inferred from the claim text.