Device for controlling the air flow of a supercharged internal c

Details Device for controlling the air flow of a supercharged internal c Device for controlling the air flow of a supercharged internal c

1996-04-29

1997-03-25

Koczo, Michael

Internal-combustion engines

Charge forming device

Supercharger

F02B 3344

Patent

active

056134789

ABSTRACT:
The invention relates to a device for controlling the air flow of a supercharged internal combustion engine with a supercharger to deliver charge air from a suction line located upstream of the supercharger through a charge air line located downstream of the supercharger to the internal combustion engine. The suction line includes an intake and a recirculating line with a recirculating valve located between the charge air line and the suction line. The recirculating line between the recirculating valve and the suction line is formed by a line section that terminates in the suction line of the supercharger downstream of the intake. In order to achieve a significant reduction of induction noise, the length of the line section from the recirculating valve to the opening in the suction line is dimensioned as a function of a presettable pulsation frequency of the supercharger so that the line section, with the recirculating valve closed, forms a resonator that is tuned to one or more pulsation frequencies of the supercharger.

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