CN203308609U

CN203308609U - Exhaust gas recirculation system of engine

Info

Publication number: CN203308609U
Application number: CN2013203059012U
Authority: CN
Inventors: 钟贤
Original assignee: Chongqing Sokon Industry Group Co Ltd
Current assignee: Chongqing Sokon Industry Group Co Ltd
Priority date: 2013-05-30
Filing date: 2013-05-30
Publication date: 2013-11-27
Anticipated expiration: 2023-05-30

Abstract

The utility model discloses an exhaust gas recirculation system of an engine. The exhaust gas recirculation system comprises an exhaust manifold, a cylinder cover, an EGR (Exhaust Gas Recirculation) control valve, and an exhaust gas introduction passage used for introducing a part of exhaust gas in the exhaust manifold into an intake port of the EGR control valve, and the exhaust gas introduction passage is integrally arranged in the cylinder cover. According to the utility model, application of an EGR cooler is cancelled from structures, the structure, which has the same effect as the EGR cooler is integrated into the cylinder cover of the engine, so that use cost of parts is reduced, assembly efficiency is improved and a fault rate is reduced, thus product quality of the engine is convenient to control, the cost is reduced, and meanwhile, the engine is more compact to be beneficial for arranging the engine on the whole vehicle, and maintenance is convenient.

Description

Engine exhaust-gas recirculating system

Technical field

The utility model relates to engine art, particularly a kind of engine exhaust-gas recirculating system.

Background technique

Gas recirculation system is called for short EGR, be that automobile is isolated the part of Exhaust Gas import the air inlet side and makes its technology of burning once again with compact internal combustion engine after burning, main purpose can improve the rate of fuel consumption rate for the nitrogen oxide reduced in Exhaust Gas when sharing sub load.

In prior art, in gas recirculation system, all need additional pipeline communication gas exhaust manifold and intake manifold, so that entering in intake manifold, the part waste gas in gas exhaust manifold again burns, and be provided with cooler for recycled exhaust gas and carry out cooling to additional pipeline, this kind structure has taken larger installing space, make the installation procedure of motor integral body become complicated, reduced efficiency of assembling, also increased the user cost of component, and cooler for recycled exhaust gas is fragile, the quality of product that will make motor integral body in case break down can not get effective control.

Therefore, need to the gas recirculation system of motor be improved, cancel the use of cooler for recycled exhaust gas, reduce the user cost of component, improve efficiency of assembling, and the quality of product that makes motor is convenient to control, cost, simultaneously, also make motor compacter, be beneficial to the layout of motor on car load, it is convenient to safeguard.

The model utility content

In view of this, the utility model provides a kind of engine exhaust-gas recirculating system, cancel the use of cooler for recycled exhaust gas, reduce the user cost of component, improve efficiency of assembling, and the quality of product that makes motor is convenient to control, cost, simultaneously, also make motor compacter, be beneficial to the layout of motor on car load, it is convenient to safeguard.

Engine exhaust-gas recirculating system of the present utility model, comprise gas exhaust manifold, cylinder head and EGR control valve, also comprise the waste gas introducing air flue that imports described EGR control valve suction port for the part waste gas by described gas exhaust manifold, described waste gas is introduced air flue and is integrally formed in described cylinder head.

Further, in described gas exhaust manifold, be integrally formed with the EGR derivation air flue of introducing the air flue inlet end for directly part waste gas in gas exhaust manifold being imported to described waste gas.

Further, described waste gas is introduced the air flue periphery and is provided with the water jacket for it is cooled.

Further, also comprise for mixed gas being imported to the intake manifold in described cylinder head, described intake manifold suction port is communicated with the waste gas ingress pipe of described EGR control valve air outlet by peripheral hardware.

The invention also discloses a kind of motor of applying described engine exhaust-gas recirculating system, described motor is installed application described engine exhaust-gas recirculating system.

The beneficial effects of the utility model: engine exhaust-gas recirculating system of the present utility model, air flue is integrated to be arranged on cylinder head by waste gas is introduced, when high-temp waste gas is introduced air flue by waste gas, by the cooling liquid in water jacket, undertaken cooling, after cooling, enter the EGR control valve, after the EGR control valve obtains the engine control system instruction, waste gas is passed into to the intake manifold suction port by waste gas ingress pipe, after fresh air in intake manifold mixes, enter again the engine interior burning, and then realize reducing the purpose of motor discharge; The utility model structure is cancelled the use of cooler for recycled exhaust gas, the structure that will play same purpose with cooler for recycled exhaust gas is dissolved in engine cylinder cover, reduce the user cost of component, improve efficiency of assembling, and reduce rate of fault, make the quality of product of motor be convenient to control, cost, simultaneously, also make motor compacter, be beneficial to the layout of motor on car load, it is convenient to safeguard.

The accompanying drawing explanation

Below in conjunction with drawings and Examples, the utility model is further described.

Fig. 1 is the utility model structural representation.

Embodiment

Fig. 1 is that Fig. 1 is the utility model structural representation, as shown in the figure: the engine exhaust-gas recirculating system of the present embodiment, comprise gas exhaust manifold 1, cylinder head 2 and EGR control valve 3, also comprise the waste gas introducing air flue e that imports described EGR control valve suction port c for the part waste gas by described gas exhaust manifold, described waste gas is introduced air flue e and is integrally formed in described cylinder head 2; In the present embodiment, also comprise for mixed gas being imported to the intake manifold 4 in described cylinder head, described intake manifold suction port a is communicated with the waste gas ingress pipe b of described EGR control valve 3 air outlets by peripheral hardware; The EGR control valve receives the engine control system instruction, and when motor turned round under load, the EGR control valve was opened, make a small amount of waste gas enter intake manifold, together with inflammable mixture, enter firing chamber, the EGR control valve is closed when idling, almost there is no EGR to motor; Wherein, the structure of the EGR control valve of the present embodiment is prior art, and the structure of mechanical structure and electric-controlled type all can not repeat them here.

In the present embodiment, in described gas exhaust manifold 1, be integrally formed with the EGR derivation air flue f that introduces air flue e inlet end for directly part waste gas in gas exhaust manifold being imported to described waste gas; As shown in the figure, gas exhaust manifold is the four cylinder engine gas exhaust manifold, comprises four air flues that communicate with air outlet flue, is respectively air flue k, air flue j, air flue i and air flue h, also comprises gas exhaust manifold air outlet g; Be wholely set and refer to waste gas introducing air flue and the one-body molded common formation gas exhaust manifold of air flue k, air flue j, air flue i and air flue h, wherein, waste gas is introduced air flue e and is communicated with the junction point of air flue k, air flue j, air flue i and air flue h, adopt the gas exhaust manifold of this kind structure to make the overall structure of gas recirculation system compacter, and the derivation of waste gas and importing are more smooth and easy, improve the cycle efficiency of waste gas.

In the present embodiment, described waste gas is introduced air flue e periphery and is provided with the water jacket d for it is cooled; In water jacket d, cooling liquid is arranged, cool for the high-temp waste gas that waste gas is introduced in air flue.

The invention also discloses a kind of motor of applying described engine exhaust-gas recirculating system, described motor is installed application described engine exhaust-gas recirculating system; Motor is installed this engine exhaust-gas recirculating system of application, makes the mounting structure of motor integral body compacter, and the derivation of waste gas and import more smooth and easyly, and the whole cycle efficiency of waste gas also improves.

Finally explanation is, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although with reference to preferred embodiment, the utility model is had been described in detail, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement the technical solution of the utility model, and not breaking away from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of claim scope of the present utility model.

Claims

1. engine exhaust-gas recirculating system, comprise gas exhaust manifold, cylinder head and EGR control valve, it is characterized in that: also comprise the waste gas introducing air flue that imports described EGR control valve suction port for the part waste gas by described gas exhaust manifold, described waste gas is introduced air flue and is integrally formed in described cylinder head.

2. engine exhaust-gas recirculating system according to claim 1, is characterized in that: in described gas exhaust manifold, be integrally formed with the EGR derivation air flue of introducing the air flue inlet end for directly part waste gas in gas exhaust manifold being imported to described waste gas.

3. engine exhaust-gas recirculating system according to claim 2 is characterized in that: described waste gas is introduced the air flue periphery and is provided with the water jacket for it is cooled.

4. engine exhaust-gas recirculating system according to claim 3, it is characterized in that: also comprise for mixed gas being imported to the intake manifold in described cylinder head, described intake manifold suction port is communicated with the waste gas ingress pipe of described EGR control valve air outlet by peripheral hardware.

5. an application rights requires the motor of the described engine exhaust-gas recirculating system of the arbitrary claim of 1-4, it is characterized in that: described motor is installed application described engine exhaust-gas recirculating system.