CN205243607U

CN205243607U - Exhaust manifold of EGR passageway is taken to high flow capacity

Info

Publication number: CN205243607U
Application number: CN201521121601.4U
Authority: CN
Inventors: 张恒斌; 李岩; 吕婧; 王亦伟; 杜宁甫
Original assignee: Nanchang Intercontinental Automotive Engineering Technology Co Ltd
Current assignee: Nanchang Intercontinental Automotive Engineering Technology Co Ltd
Priority date: 2015-12-31
Filing date: 2015-12-31
Publication date: 2016-05-18
Anticipated expiration: 2025-12-31

Abstract

The utility model provides an exhaust manifold of EGR passageway is taken to high flow capacity, including the exhaust branch mouth of connecting each cylinder, connect the EGR passway of exhaust gas circulation pipeline, prop up the pipe flange with the engine is connected to and exhaust manifold, exhaust branch mouth and EGR passway are oblate, and the the arc RADIUS at both ends was the half the of oblate width about this was oblate, and this oblate height and width ratio are between 1.24-1.32, exhaust branch mouth fitting surface rather than pipe flange front end face not at the coplanar, exhaust branch mouth fitting surface is hugged closely and is started the organism, and before the flange terminal surface with prop up mouth of pipe fitting surface interval between 8-12mm, and exhaust branch mouth and EGR passway are on the coplanar. This exhaust manifold can provide a good mouth of pipe sealing performance, bears higher exhaust backpressure, provides great extraction flow under less volume prerequisite, and engine cofiguration occupation space is saved to the EGR passageway that has still integrateed simultaneously.

Description

A kind of high flow capacity the exhaust manifold with EGR passage

Technical field

The utility model relates to engine art, is specifically related to a kind of high flow capacity the exhaust manifold with EGR passage.

Background technology

In turbocharged engine, the gas flow of engine breathing is far above non-supercharged engine, and that the feature of engine with supercharger is exactly HP, hp/litre is high, engine volume is less, so how under compact structure condition, realize high flow capacity engine exhaust, improving engine breathing efficiency, is a difficulties of current engine with supercharger.

Meanwhile, because needs provide energy to turbine, the high-temperature gas pressure before turbine is higher, causes exhaust manifold need to bear higher exhaust back pressure, easily causes the seal failure of exhaust manifold and engine junction and leaks gas.

Utility model content

The utility model object is to provide a kind of high flow capacity the exhaust manifold with EGR passage, this exhaust manifold can provide a good mouth of pipe sealing property, bear higher exhaust back pressure, larger extraction flow is provided under smaller size smaller prerequisite, and integrated EGR passage, saves engine arrangement and takes up room.

For achieving the above object, the utility model provides following technical scheme:

A kind of high flow capacity the exhaust manifold with EGR passage, comprise the exhaust branch pipe mouth that connects each cylinder, connect the EGR passway of waste gas circulation pipeline, the pipe flange being connected with engine, and exhaust main, described exhaust branch pipe mouth and EGR passway are oblate, the half that the arc radius at these oblate upper and lower two ends is oblate width, and this oblate height and the width ratio is between 1.24 ~ 1.32.

Described exhaust branch pipe mouth mating surface and its pipe flange front end face be not at same plane, exhaust branch pipe mouth mating surface is close to engine block, and flange front end face and mouth of pipe mating surface spacing be between 8 ~ 12mm, and exhaust branch pipe mouth and EGR passway are at grade.

Before described exhaust main is arranged on the exhaust branch pipe of rearmost end cylinder, exhaust main Way out and exhaust branch pipe airflow direction are perpendicular, and near exhaust main position, EGR passage are being set, after EGR passway is arranged on the exhaust branch pipe mouth of rearmost end cylinder.

The height and position of described exhaust branch pipe mouth and EGR passway is on same axis, and the position, axis of each exhaust branch pipe arranges web each arm outer wall is connected.

The beneficial effects of the utility model are:

A kind of high flow capacity provided by the utility model the exhaust manifold with EGR passage, oblate, oblate exhaust branch pipe mouth and the EGR passway of height and the width ratio between 1.24 ~ 1.32 of using, in the cross-wise direction flowing at engine Exhaust Gas, can be exhaust be discharged comparatively uniformly pressure, avoid producing a large amount of turbulent flows, compared with float gas branch pipe cross section in the situation that, provide higher extraction flow, improved engine exhaust efficiency, promoted efficiency of combustion, and because exhaust branch pipe cross section is little, the volume of exhaust manifold entirety is also just less, simultaneously also integrated EGR passage, has saved the space that engine arrangement takies greatly, has expanded the scope of application of engine, the exhaust branch pipe mouth mating surface using and its pipe flange front end face be not at same plane, exhaust branch pipe mouth mating surface is close to engine block, and flange front end face and a mouth of pipe mating surface spacing are between 8 ~ 12mm, due to the postposition of flange, make contact-making surface can obtain higher pressure in same bolt thrust situation, such structural strengthening the pressure of exhaust branch pipe mouth and EGR passway and engine junction, be not easy gas leakage at the situation lower branch line mouth mating surface of higher exhaust back pressure, simultaneously little and cause the inhomogeneous problem of each arm thermal stress for fear of a mouth of pipe mating surface and engine contact area, the height and position of exhaust branch pipe mouth and EGR passway has been arranged on same axis, and the position, axis of each exhaust branch pipe arranges web each arm outer wall is connected, high flow capacity the exhaust manifold structure intensity with EGR passage are ensured.

Brief description of the drawings

Fig. 1 is the front view of embodiment of the present utility model.

Fig. 2 is the side view of embodiment of the present utility model.

Fig. 3 is the rearview of embodiment of the present utility model.

Fig. 4 is the A-A cutaway view of embodiment of the present utility model.

Fig. 5 is the upward view of embodiment of the present utility model.

Mark in accompanying drawing: 1-exhaust branch pipe mouth, 2-EGR passway, 3-flange front end face, 31-props up pipe flange, the pipe flange of 32-with EGR passage, 4-props up mouth of pipe mating surface, 5-web, 6-exhaust main, 7-exhaust branch pipe, 8-EGR passage.

Detailed description of the invention

As shown in Fig. 1 to 5, a kind of high flow capacity the exhaust manifold with EGR passage, comprise the exhaust branch pipe mouth 1 that connects each cylinder, connect the EGR passway 2 of waste gas circulation pipeline, the pipe flange 3 being connected with engine, and exhaust main 6, described exhaust branch pipe mouth 1 and EGR passway 2 are oblate, the arc radius at these oblate upper and lower two ends is the half of oblate width, this oblate height and the width ratio is between 1.24 ~ 1.32, in the cross-wise direction flowing at engine Exhaust Gas, can be exhaust be discharged to exhaust main 6 comparatively uniformly pressure, avoid producing a large amount of turbulent flows, provide higher extraction flow less in the situation that in exhaust branch pipe 7 cross sections, improve engine exhaust efficiency, promote efficiency of combustion, and because exhaust branch pipe 7 cross sections are little, the volume of exhaust manifold entirety is also just less, simultaneously also integrated EGR passage 8, has saved the space that engine arrangement takies greatly, has expanded the scope of application of engine.

Particularly, described exhaust branch pipe mouth mating surface 4 and its pipe flange front end face 3 be not at same plane, exhaust branch pipe mouth mating surface 4 is close to engine block, and flange front end face 3 and mouth of pipe mating surface 4 spacing are between 8 ~ 12mm, and exhaust branch pipe mouth 1 and EGR passway 2 are at grade, due to the postposition of a pipe flange 31 and the pipe flange 32 with EGR passage, make in same bolt thrust situation, to have obtained higher pressure with a mouth of pipe mating surface 4 for engine contact, such structural strengthening the pressure of exhaust branch pipe mouth 1 and EGR passway 2 with engine junction, make a mouth of pipe mating surface 4 in the situation that of higher exhaust back pressure, be not easy gas leakage.

Particularly, before described exhaust main 6 is arranged on the exhaust branch pipe 7 of rearmost end cylinder, exhaust main 6 Way outs and exhaust branch pipe 7 airflow directions are perpendicular, and near exhaust main 6 positions, EGR passage 8 are being set, after EGR passway 2 is arranged on the exhaust branch pipe mouth 1 of rearmost end cylinder.

Particularly, the height and position of described exhaust branch pipe mouth 1 and EGR passway 2 is on same axis, and the position, axis of each exhaust branch pipe 7 arranges web 5 each arm outer wall is connected, avoid mouth of pipe mating surface 4 and engine contact area little and cause the inhomogeneous problem of thermal stress of each arm, ensured high flow capacity the exhaust manifold structure intensity with EGR passage.

Claims

1. a high flow capacity the exhaust manifold with EGR passage, comprise the exhaust branch pipe mouth that connects each cylinder, connect the EGR passway of waste gas circulation pipeline, the pipe flange being connected with engine, and exhaust main, it is characterized in that, described exhaust branch pipe mouth and EGR passway are oblate, the arc radius at these oblate upper and lower two ends is the half of oblate width, and this oblate height and the width ratio is between 1.24 ~ 1.32.

2. a kind of high flow capacity according to claim 1 the exhaust manifold with EGR passage, it is characterized in that, described exhaust branch pipe mouth mating surface and its pipe flange front end face be not at same plane, exhaust branch pipe mouth mating surface is close to engine block, and flange front end face and mouth of pipe mating surface spacing be between 8 ~ 12mm, and exhaust branch pipe mouth and EGR passway are at grade.

3. a kind of high flow capacity according to claim 1 the exhaust manifold with EGR passage, it is characterized in that, before described exhaust main is arranged on the exhaust branch pipe of rearmost end cylinder, exhaust main Way out and exhaust branch pipe airflow direction are perpendicular, and near exhaust main position, EGR passage is being set, after EGR passway is arranged on the exhaust branch pipe mouth of rearmost end cylinder.

4. a kind of high flow capacity according to claim 1 the exhaust manifold with EGR passage, it is characterized in that, the height and position of described exhaust branch pipe mouth and EGR passway is on same axis, and the position, axis of each exhaust branch pipe arranges web each arm outer wall is connected.