Plurality Of Chambers Research Articles

FUEL RAIL FOR ATTENUATING RADIATED NOISE

A fuel rail includes an elongated tube having an inlet and a plurality of outlets. The elongated tube defines a fuel passageway for directing fuel toward the plurality of outlets. The fuel rail also includes a plurality of baffles positioned within the elongated tube to divide the fuel passageway into a plurality of chambers such that each outlet is positioned in one of the plurality of chambers. The plurality of baffles restricts fluid flow between adjacent chambers. A majority of the plurality of outlets are located essentially at an acoustic node of each corresponding chamber to reduce noise generated by the fuel rail.

INTEGRATED MASS AIR FLOW SENSOR AND BROADBAND SILENCER

An integrated mass air flow sensor/broadband silencer assembly comprises a molded body having a plurality of walls formed therein. The molded body is over-wrapped with a layer of acoustic foam that, together with the plurality of walls, define a plurality of chambers within an interior volume of the assembly. A mass air flow sensor can be inserted into one of the chambers. The chambers are sized and spaced to provide a uniform velocity, low turbulence air flow to the sensor, and a minimally-restricted air flow to an internal combustion engine located downstream of the assembly.

Multi-chamber muffler with selective sound absorbent material placement

The present invention provides an acoustic muffler for attenuating sound waves of the exhaust gas of an internal combustion engine including a shell, a plurality of walls closing both ends of the shell and dividing an interior of the shell into a plurality of chambers. The plurality of chambers include a first chamber having a sound absorbing material disposed therein. An imperforate pipe extends between the walls of the first chamber. Preferably, the plurality of chambers also include a second and a third chamber communicating with the imperforate pipe. Furthermore, a fourth chamber communicates with the second chamber.

Muffler with Variable Damping Characteristics

A muffler and an actuating cell provided so that the acoustic properties of the muffler can be changed. The pressure drop in the muffler is fed to the actuating cell as a control pressure. The actuating cell has a plurality of chambers which are separated by diaphragms. Each diaphragm is supported by a spring and each chamber has a pressure connection. A first pressure line feeds the total gas pressure to the overpressure side of the first diaphragm. Another pressure line directs the static gas pressure to the low-pressure side of this diaphragm. Attached to the diaphragm is a piston rod which carries a valve closing element which closes or opens a gas feed pipe.

Trapezoidal sound absorption module

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Engine exhaust apparatus

An engine exhaust including a silencer which has a cylindrical shell, a front and a rear end plate which are provided to close both ends of the cylindrical shell, and at least three partition walls to divide an inside space of the silencer into a plurality of chambers, i.e. at least a first chamber, a second chamber, a third chamber and a fourth chamber. An inlet pipe which bypasses at least the first and the second chambers, and connects the front end and the third chamber. The inlet pipe has a plurality of small holes which face toward the first and the second chambers. The small holes facing the second chamber are surrounded by a sound absorber. An outlet pipe bypasses at least the second, the third and the fourth chambers and connects the first chamber and the rear end plate. The outlet pipe has a plurality of small holes which face toward the third and the fourth chambers. The small holes facing the fourth chamber are surrounded by a sound absorber.