SU939797A1

SU939797A1 - Apparatus for silencing i.c. engine exhaust noise

Info

Publication number: SU939797A1
Application number: SU802926677A
Authority: SU
Inventors: Рудольф Натанович Старобинский; Михаил Ильич Фесина; Юрий Александрович Кирюшин
Original assignee: Волжское объединение по производству легковых автомобилей (АвтоВАЗ); Тольяттинский политехнический институт
Priority date: 1980-05-21
Filing date: 1980-05-21
Publication date: 1982-06-30

Description

1one

Изобретение относитс к двигателестроению , конкретнее к системам выпуска отработаавих газов, и предназначено дл снижени шума выпуска.The invention relates to engine construction, more specifically to exhaust systems, and is intended to reduce exhaust noise.

Известно устройство глушени шума выхлопа двигател внутреннего сгорани , содержащее насадок, состыкованный с выхлопной трубой двигател и разветвл ющийс по меньшей мере на два патрубка дл выпуска отработавших газов, обращенные среза и в противоположные стороны J.A device for silencing the exhaust noise of an internal combustion engine is known, comprising nozzles coupled to the exhaust pipe of the engine and branching out at least two nozzles for exhausting, reversed sections and in opposite directions J.

Устройство позвол ет снижать шум двигател .The device allows to reduce engine noise.

Недостатком известного устройства вл етс то, что излучающие шум срезы патрубков расположены настолько близко друг к другу, что каждому из излучателей (срезов) приходитс преодолевать не только собственное звуковое противодавление, но и звуковое давление, создаваемое близ корасположенным звуковым излучателем . При этом звукова работа и со ответственное излучение патрубка удваиваютс .A disadvantage of the known device is that the noise-emitting sections of the nozzles are so close to each other that each of the emitters (sections) must overcome not only its own sound back pressure, but also the sound pressure generated by the near-arranged sound emitter. In this case, the sonic operation and the responsible radiation of the nozzle are doubled.

Цель изобретени - повышение эффективности.The purpose of the invention is to increase efficiency.

Поставленна цель достигаетс тем, что срезы патрубков расположены один от другого на рассто нии, составл ющем 3-8 диаметров выхлоп Р ной трубы, патрубки дл выпуска газов могут иметь разную длину, а срезы расположены параллельно оси выхлопной трубы. This goal is achieved by the fact that the nozzle cuts are located one from another at a distance of 3 to 8 diameters of the exhaust pipe, the nozzles for exhausting gases can have different lengths, and the cuts are parallel to the axis of the exhaust pipe.

На фиг.1 показано предлагаемое устройство; на фиг.2 - то же, Figure 1 shows the proposed device; figure 2 - the same

15 вариант.15 option.

Устройство содержит выхлопную трубу t двигател , насадок 2, патрубки 3 и А.The device comprises an exhaust pipe t of the engine, nozzles 2, pipes 3 and A.

При.работе выхлопные газы Run exhaust gases

Claims

20. An internal combustion engine passes from the exhaust pipe 1 to the nasa-dock 2, and through pipes 3 and the primer, is released into the atmosphere. 39 A constant total area allows for low hydraulic losses at the flow separation points. The energy emitted by each radiator is proportional to the area and the emissivity. For emitters with a characteristic size less than half the wavelength placed at a distance greater than L / 3. emissivity is determined. their area and significantly reduces with its decrease, which causes the damping effect. Sections of nozzle nozzles are separated by a distance of 3–8 exhaust pipe diameters. If this value is greater than 8, then, on the one hand, this will increase the intensity of the structure. On the other hand, the sound with such lower frequencies can be suppressed less. If this value is less than 3, then the nozzle starts to jam the noise from a higher frequency, and this already reduces its efficiency. For the directional suppression of individual frequencies, due to interference, the exhaust manifolds may have different lengths. The proposed device makes it possible to increase the efficiency of noise suppression. Claims of the invention characterized in that, in order to increase efficiency, nozzle cuts are spaced from one another at a distance of 3-8 times the diameter of the exhaust pipe. 2, a device according to claim 1, characterized in that the nozzle cuts are parallel to the axis of the exhaust pipe; 3. The device according to claim 1, characterized in that the nozzles are made different from each other in length. Sources of information taken into account in the examination 1, UK Patent No. 2 + 0944b, class, F 1 B, published, .1973o