CN2639533Y

CN2639533Y - Exhaust damping system of water-cooled internal-combustion engine

Info

Publication number: CN2639533Y
Application number: CN 02230868
Authority: CN
Inventors: 干方飞
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-04-09
Filing date: 2002-04-09
Publication date: 2004-09-08
Anticipated expiration: 2012-04-09

Abstract

The utility model relates to an exhaust silencer used in a water cooling internal combustion engine, which comprises an exhaust pipe connected with the exhaust outlet of the internal combustion engine by a flange and an anechoic chamber connected with the exhaust pipe; wherein, the anechoic chamber has a plurality of expansion chambers which are interconnected with each other by small ventilator tubes. The utility model is characterized in that the exhaust goes through the cooling stream current via the water cooling small ventilator tubes so that the high temperature exhaust in the small ventilator tubes is diminished, the air is compressed because of being cooled, the discharge pressure is reduced finally and the power output of the internal combustion engine is improved.

Description

The water-cooled engine exhausting silencer system

Affiliated technical field

The utility model belongs to I. C. engine exhaust sound-attenuating system technical field.

Background technique

Well-knownly be, internal-combustion engine can produce the waste gas of a large amount of High Temperature High Pressure and exhaust sound up to 120 decibels when work, and the poisonous fume of this discharging and noise have also seriously influenced human ecotope in befouling environment.For this reason, engineers and technicians have installed an air exhaust muffler device at the relief opening of internal-combustion engine.This silencer comprises that one is connected to the outlet pipe of engine exhaust port by flange, and the anechoic chamber that links to each other with outlet pipe, and expansion chamber is arranged in the anechoic chamber, has little breathing pipe continuous between the expansion chamber.When the High Temperature High Pressure waste gas of internal-combustion engine through outlet pipe during to the anechoic chamber, the effect of expansion chamber makes air-flow obtain expanding and cooling, then through too small breathing pipe to next expansion chamber, make air-flow obtain once more expanding and cooling, discharge from the exhaust port of afterbody at last.Because the exhaust sound of internal-combustion engine is taken out of by this strand air-flow, air-flow obtains expanding in expansion chamber and cooling, thereby flow velocity is slowed down, and finally reaches the noise elimination purpose.But, when internal-combustion engine when running up, little breathing pipe has little time exhaust in the anechoic chamber, make to have formed certain air pressure in the expansion chamber, the resistance of exhaust is increased, to the exhaust resistance of increase during greater than the pressure of residual gas in the cylinder, caused the backflow of part waste gas, thereby the waste gas in the cylinder of internal-combustion engine is increased, make burning insufficient, power output is greatly affected.One of method that addresses the aforementioned drawbacks is exactly the effective aperture that increases little breathing pipe in the anechoic chamber, and so obvious exhaust resistance has reduced, but the noise of exhaust has increased.Also having a kind of method is exactly that a blower fan that brute force is air-breathing has been installed on vent systems, to reduce the exhaust pressure in the outlet pipe.But it is all multifactor that this powerful vent systems will relate to motor, control system, manufacture cost, working life etc., and can't spread on all internal-combustion engines.Another scheme is set up turbo charge system exactly, and this system can increase the fresh air in the firing chamber in powerful scavenging, thereby power of IC engine is got a promotion.But the turbo charge system complex structure is installed trouble, maintenance difficult, and the user cost height can't adapt on general internal-combustion engine and use.Therefore, above-mentioned several solution still can not obviously change the technical bug that exists in the exhausting silencer system.

Summary of the invention

The purpose of this utility model just provides a kind of novel air-cooled engine exhausting silencer system.

The utility model comprises an outlet pipe that is connected to internal combustion engine air vent by flange, an and anechoic chamber that links to each other with outlet pipe, expansion chamber is arranged in the anechoic chamber, link to each other by little breathing pipe between the expansion chamber, little breathing pipe is immersed in the water tank, and water tank links to each other with the cooling system of internal-combustion engine with water outlet by water intake.So just make the high-temp waste gas of internal-combustion engine through too small breathing pipe the time, obtain the influence of cooling water, thereby reduce the temperature of waste gas effectively, make it be subjected to cold compression, finally reach the purpose of noise elimination.

The utility model has been owing to designed water-cooled little breathing pipe, thereby improved the cooling effect of exhausting silencer system, reduced delivery temperature, the exhaust pressure of internal-combustion engine reduced, thereby power output is got a promotion.Solve existing sound-attenuating system and under the prerequisite that does not influence power output, increased exhaust sound, under the prerequisite that does not improve exhaust sound, influenced the defective of power output again.Can be widely used on the various internal combustion engines, and will produce positive society and economy benefit.

Description of drawings

Fig. 1 is a side view cutaway drawing of the present utility model

Fig. 2 is a cross-section cutaway view of the present utility model.

Embodiment

Describe concrete device and the implementation detail that the utility model proposes in detail below in conjunction with above-mentioned accompanying drawing.The utility model comprises that one is connected to the outlet pipe (1) of internal combustion engine air vent and the anechoic chamber (4) that links to each other with outlet pipe (1) by flange, design has several expansion chambers (2) (11) (10) (9) that is linked to each other by little breathing pipe (3) (5) (7) in the anechoic chamber (4), link to each other by little breathing pipe (3) (5) (7) between the expansion chamber (2) (11) (10) (9), its medium and small breathing pipe (3) (5) has intake pipe (13) and outlet pipe (12) through in anechoic chamber (4) outside cooling water tank (8) on the cooling water tank (8).Be appreciated that intake pipe (13) links to each other with a cooling system by water pump with outlet pipe (12).In the end there is a little outlet pipe (6) to link to each other on the expansion chamber (10) with the external world.On scheming, can see, outlet pipe (1) links to each other with expansion chamber (11), expansion chamber (11) links to each other with expansion chamber (9) by the little breathing pipe of water-cooled (5), above-mentioned expansion chamber (9) links to each other with expansion chamber (2) by built-in little breathing pipe (7) again, above-mentioned expansion chamber (2) links to each other with next expansion chamber (10) by the little breathing pipe of water-cooled (3), and expansion chamber (10) communicates with the external world with little outlet pipe (7) again.When the high-temp waste gas of internal-combustion engine through outlet pipe (1) during to expansion chamber (11), the effect of expansion chamber (11) makes air-flow obtain cooling and buffering, repeat said process then from little breathing pipe (5) to next expansion chamber (9), after pass through built-in little breathing pipe (7) again and repeat said process to next expansion chamber (2), arrive a last expansion chamber (10) through too small breathing pipe (3) again then, in little outlet pipe (6), discharge at last.From above exhaust flow path, can see, twice process of high-temp waste gas little breathing pipe of water-cooled (3) (5), because water temperature is starkly lower than the high temperature in the anechoic chamber, thereby greatly reduce the temperature of waste gas, make hot air be subjected to cold compression, reduced exhaust resistance, improved exhaust efficiency, thereby made the power of internal-combustion engine export the influence that is not subjected to exhaust resistance.

Claims

1, water-cooled engine exhausting silencer system, this system comprises an outlet pipe that is connected to internal combustion engine air vent by flange, and the anechoic chamber that links to each other with outlet pipe, the expansion chamber that has several to link to each other in the anechoic chamber by little breathing pipe, it is characterized in that: have little breathing pipe (3) (5) (7) to link to each other between the expansion chamber (11) (9) (2) (10), its medium and small breathing pipe (3) (5) is through in anechoic chamber (4) outside cooling water tank (8).

2, water-cooled engine exhausting silencer system according to claim 1 is characterized in that: cooling water tank (8) has intake pipe (13) to link to each other with the cooling system of outlet pipe (12) and internal-combustion engine.

3, water-cooled engine exhausting silencer system according to claim 1 and 2 is characterized in that: the rarest little breathing pipe (5), (3) more than 1 between each expansion chamber (11) that links to each other, (9) and (2), (10).