Intake noise reducing device for internal combustion engine
AssigneeNissan Motor Co., Ltd.
InventorYuuichi Sakuma
Life of this patent
Estimating the term…
Abstract
A continuous partition wall is formed in the air introducing duct. The air introducing duct has a length L. The partition wall has a length equal to or greater than L/2. The partition wall divides the air introducing duct into first and second sections. A resonance silencer and a connecting duct are connected to the first section. A connecting position of the resonance silencer and the connecting duct is set such that the connecting position is fully included within a partition wall positioned range. A valve is arranged in the second section. Thus, intake noises is decreased in a wide range from a low frequency about 40 Hz to an intermediate frequency about several hundred Hz, which is normally hearable.
Claims17
An intake noise reducing device for an internal combustion engine, comprising:
- an air introducing duct into an internal combustion engine, the duct having a length L;
- a partition wall in the duct dividing into first and second sections, the partition wall having a length equal to or greater than L/2;
- a silencer;
- a connecting duct connecting the first section and the silencer, a connecting position of the connecting duct to the duct being in opposite to the partition wall;
- and
- a valve opening and closing the second section.
An intake noise reducing device for an internal combustion engine, comprising:
- air introducing means for introducing air into an internal combustion engine, the introducing means having a length L;
- partitioning means in the introducing means for dividing into first and second sections, the partition means having a length equal to or greater than L/2;
- a silencer;
- connecting means for connecting the first section and the silencer, a connecting position of the connecting means to air introducing means being in opposite to the partitioning means;
- and
- opening-closing means for opening and closing the second section.
An automobile, comprising:
- an internal combustion engine;
- a air introducing duct into the engine, the duct having a length L;
- a partition wall in the duct dividing into first and second sections, the wall having a length equal to or greater than L/2;
- a silencer;
- a connecting duct connecting the first section and the silencer, a connecting position of the connecting duct to the duct being in opposite to the partition wall;
- and
- a valve opening and closing the second section.
Dependencies are inferred from the claim text.