CN216381589U

CN216381589U - Pulse exhaust manifold assembly

Info

Publication number: CN216381589U
Application number: CN202123407422.5U
Authority: CN
Inventors: 刘怀强; 秦善斌; 张传明; 滕启寨; 邹萍
Original assignee: China National Heavy Duty Truck Group Jinan Power Co Ltd
Current assignee: China National Heavy Duty Truck Group Jinan Power Co Ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-04-26
Anticipated expiration: 2031-12-31

Abstract

The utility model provides a pulse exhaust manifold assembly which is convenient for arrangement of an exhaust manifold and prolongs the service life of an air outlet of the exhaust manifold and comprises a front exhaust manifold, a middle exhaust manifold and a rear exhaust manifold which are detachably connected in sequence; the rear side of the front exhaust manifold is communicated with a No. 1 air inlet, a No. 2 air inlet and a No. 3 air inlet in sequence, the rear side of the middle exhaust manifold is communicated with a No. 4 air inlet and a No. 5 air inlet, and the rear side of the rear exhaust manifold is communicated with a No. 6 air inlet; the No. 1 air inlet, the No. 2 air inlet, the No. 3 air inlet, the No. 4 air inlet, the No. 5 air inlet and the No. 6 air inlet are respectively connected with exhaust runners of the 1 cylinder, the 2 cylinder, the 3 cylinder, the 4 cylinder, the 5 cylinder and the 6 cylinder; the front side of the middle exhaust manifold is communicated with a No. 1 air outlet and a No. 2 air outlet, and the No. 1 air outlet is communicated with a No. 1 air inlet, a No. 2 air inlet and a No. 3 air inlet.

Description

Pulse exhaust manifold assembly

Technical Field

The utility model relates to the field of exhaust manifolds for diesel engines, in particular to an exhaust manifold for a six-cylinder diesel engine, and specifically relates to a pulse exhaust manifold assembly.

Background

The engine exhaust manifold is used for connecting a cylinder cover and an exhaust gas turbocharger, and the exhaust gas after combustion of each cylinder is guided into the turbocharger to do work.

The exhaust manifold can be divided into a rear exhaust manifold and a middle exhaust manifold according to different outlet positions of the exhaust manifolds, but the exhaust manifolds of common middle or rear structures cannot meet the requirements of the engine due to the limited arrangement space of the exhaust manifold and the supercharger of the engine.

The outlet of the exhaust manifold is generally arranged in a square shape, the inner hole flow channel is designed to be a square, O-shaped or D-shaped symmetrical outlet, but due to the fact that the thermal load at the outlet is high, although the D-shaped structure has the advantage that the thermal fatigue life of the outlet is remarkably prolonged compared with the square or O-shaped structure, the outlet position is cracked.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a pulse exhaust manifold assembly, which is convenient for arrangement of an exhaust manifold and prolongs the service life of an air outlet of the exhaust manifold.

The utility model is realized by the following technical scheme:

a pulse exhaust manifold assembly comprises a front exhaust manifold, a middle exhaust manifold and a rear exhaust manifold which are detachably connected in sequence;

the rear side of the front exhaust manifold is communicated with a No. 1 air inlet, a No. 2 air inlet and a No. 3 air inlet in sequence, the rear side of the middle exhaust manifold is communicated with a No. 4 air inlet and a No. 5 air inlet, and the rear side of the rear exhaust manifold is communicated with a No. 6 air inlet;

the No. 1 air inlet, the No. 2 air inlet, the No. 3 air inlet, the No. 4 air inlet, the No. 5 air inlet and the No. 6 air inlet are respectively connected with exhaust runners of the 1 cylinder, the 2 cylinder, the 3 cylinder, the 4 cylinder, the 5 cylinder and the 6 cylinder;

the front side of the middle exhaust manifold is communicated with a gas outlet No. 1 and a gas outlet No. 2, the gas outlet No. 1 is communicated with a gas inlet No. 1, a gas inlet No. 2 and a gas inlet No. 3, and the gas outlet No. 2 is communicated with a gas inlet No. 4, a gas inlet No. 5 and a gas inlet No. 6.

Furthermore, No. 1 gas outlet and No. 2 gas outlet are separated from each other through a partition wall, No. 1 gas inlet, No. 2 gas inlet, No. 3 gas inlet, No. 4 gas inlet, No. 5 gas inlet and No. 6 gas inlet all are provided with gas inlet flanges, No. 1 gas outlet and No. 2 gas outlet all are provided with gas outlet flanges, and the gas inlet flanges and the mounting surfaces of the gas outlet flanges are distributed in parallel.

Furthermore, the cross sections of the air outlet flanges of the No. 1 air outlet and the No. 2 air outlet are of nostril-shaped structures which are symmetrical left and right.

Further, front exhaust manifold's front side is equipped with 1 number EGR and gets the gas port, well exhaust manifold is being close to 2 number gas outlet positions are equipped with 2 numbers EGR and get the gas port, 1 number EGR gets the gas port can with 1 number air inlet, 2 numbers air inlet, 3 numbers air inlet intercommunication, 2 numbers EGR gets the gas port can with 4 numbers air inlet, 5 numbers air inlet and 6 numbers air inlet intercommunication.

Furthermore, the flow passages corresponding to the No. 2 air inlet, the No. 3 air inlet and the No. 5 air inlet are horn-shaped structures; and the flow channel corresponding to the No. 4 air inlet is of an inverted s-shaped structure.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model is composed of a front exhaust manifold, a middle exhaust manifold and a rear exhaust manifold, avoids the reliability fault of the exhaust manifold caused by thermal expansion, and arranges the air outlet at the front side of the middle exhaust manifold, thereby facilitating the integral installation and meeting the space requirement of the integral design of the engine;

the gas outlets are divided into a No. 1 gas outlet and a No. 2 gas outlet, and gas generated by the corresponding cylinders is introduced into the supercharger, so that compared with the single gas outlet in the prior art, the gas flow loss is reduced, the reliability of the gas outlet structure is improved, the hot melting or cracking of the gas outlet structure is avoided, and the service life of the gas outlet is prolonged;

2. the cross sections of the air outlet flanges of the air outlet 1 and the air outlet 2 are of a left-right symmetrical nostril-shaped structure, so that the air outlet flange is conveniently connected with the supercharger, the air can smoothly enter the supercharger from the air outlet, and the air flow loss is greatly reduced;

3. the flow passages corresponding to the No. 2 air inlet, the No. 3 air inlet and the No. 5 air inlet are of a horn-shaped structure; the runner that No. 4 air inlets correspond is reverse s-shaped structure, avoids each jar carminative influence to lead to the loss of exhaust pulse energy, promotes the exhaust capacity utilization efficiency.

Drawings

FIG. 1 is a schematic perspective view of a pulse exhaust manifold assembly according to the present invention;

FIG. 2 is a front view of the pulse exhaust manifold assembly of the present invention;

FIG. 3 is a cross-sectional view of a pulse exhaust manifold assembly according to the present invention;

in the figure: 1. front exhaust manifold, 2, middle exhaust manifold, 3, back exhaust manifold, 4, 1 air inlet, 5, 2 air inlet, 6, 3 air inlet, 7, 4 air inlet, 8, 5 air inlet, 9, 6 air inlet, 10, 1 air outlet, 11, 2 air outlet, 12, dividing wall, 13, ox horn structure runner, 14, inverse s-shaped structure runner, 15, 1 EGR air intake, 16, 2 EGR air intake.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present invention, it is to be understood that the terms "front", "back", "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

As shown in fig. 1-3, the present embodiment discloses a pulse exhaust manifold assembly, which adopts a completely new design of the outlet position of the exhaust manifold, a completely new design of the outlet shape of the exhaust manifold, and a completely new design of the flow passage structure of the exhaust manifold. The pulse exhaust manifold assembly is formed by sequentially connecting three pipe sections of a front exhaust manifold 1, a middle exhaust manifold 2 and a rear exhaust manifold 3, adjacent pipe sections are connected in an inserting mode and are matched with two sealing rings for sealing, and gas leakage is avoided.

The rear side of the front exhaust manifold 1 is sequentially communicated with a No. 1 air inlet 4, a No. 2 air inlet 5 and a No. 3 air inlet 6, the rear side of the middle exhaust manifold 2 is communicated with a No. 4 air inlet 7 and a No. 5 air inlet 8, the rear side of the rear exhaust manifold 3 is communicated with a No. 6 air inlet 9, the No. 1 air inlet 4, the No. 2 air inlet 5, the No. 3 air inlet 6, the No. 4 air inlet 7, the No. 5 air inlet 8 and the No. 6 air inlet 9 are all provided with air inlet flanges, and are respectively communicated with exhaust runner openings of the 1 cylinder, the 2 cylinder, the 3 cylinder, the 4 cylinder, the 5 cylinder and the 6 cylinder through the air inlet flanges.

The front side of the middle exhaust manifold 2 is communicated with a No. 1 air outlet 10 and a No. 2 air outlet 11, a partition wall 12 is processed in the middle exhaust manifold 2 to separate the No. 1 air outlet 10 from the No. 2 air outlet 11, so that the No. 1 air outlet 10 is communicated with a No. 1 air inlet 4, a No. 2 air inlet 5 and a No. 3 air inlet 6, and the No. 2 air outlet 11 is communicated with a No. 4 air inlet 7, a No. 5 air inlet 8 and a No. 6 air inlet 9. No. 1 air outlet 10 and No. 2 air outlet 11 are distributed in a nostril shape and can be matched with the shape of a throat of the supercharger, so that the thermal fatigue life of the outlet structure is prolonged while the exhaust resistance is reduced. The No. 1 air outlet 10 and the No. 2 air outlet 11 are jointly processed with an air outlet flange, the cross section of the air outlet flange is of a left-right symmetrical nostril-shaped structure, and the air outlet flange is positioned between the 4 cylinders and the 5 cylinders. For convenience in installation, the air inlet flange and the air outlet flange are arranged in parallel, and the outer side of the air outlet flange is matched with the threaded holes in trapezoidal distribution, so that the supercharger is convenient to install.

The runner that No. 2 air inlet 5, No. 3 air inlet 6 and No. 5 air inlet 8 correspond in pulse exhaust manifold assembly inner chamber is ox horn shape structure runner 13, and the runner that No. 4 air inlet 7 corresponds in pulse exhaust manifold assembly inner chamber is anti-s shape structure runner 14, so the design, each jar exhaust interference has effectually been reduced, effectively does benefit to the exhaust pulse, reduces the exhaust energy loss.

In order to facilitate EGR gas taking, a No. 1 EGR gas taking port 15 is machined in the front side of a front exhaust manifold 1, a No. 2 EGR gas taking port 16 is machined in a position, close to a No. 2 gas outlet 11, of a middle exhaust manifold 2, the No. 1 EGR gas taking port can be communicated with a No. 1 gas inlet 4, a No. 2 gas inlet 5 and a No. 3 gas inlet 6 to ensure that gas of 1 cylinder, 2 cylinder and 3 cylinder is taken out, and the No. 2 EGR gas taking port can be communicated with a No. 4 gas inlet 7, a No. 5 gas inlet 8 and a No. 6 gas inlet 9 to ensure that gas of 4 cylinder, 5 cylinder and 6 cylinder is taken out.

The working principle of the pulse exhaust manifold assembly is as follows:

waste gas generated by the

cylinders

1, 2 and 3 respectively enters the front exhaust manifold through the air inlet 1, the air inlet 2 and the air inlet 3 and then enters the supercharger under the guide of the air outlet 1, and waste gas generated by the cylinders 4, 5 and 6 respectively enters the middle exhaust manifold through the air inlet 4, the air inlet 5 and the air inlet 6 and then enters the supercharger under the guide of the air outlet 2.

The design of the pulse exhaust manifold avoids the reliability fault of the exhaust manifold caused by thermal expansion, and the air outlet is arranged at the front side of the middle exhaust manifold, so that the integral installation is convenient, and the space requirement of the integral design of an engine is met; the air flow loss is reduced, the reliability of the air outlet structure is improved, and the hot melting or cracking of the air outlet structure is avoided, so that the service life of the air outlet is prolonged.

Claims

1. A pulse exhaust manifold assembly is characterized by comprising a front exhaust manifold, a middle exhaust manifold and a rear exhaust manifold which are detachably connected in sequence;

2. The pulse exhaust manifold assembly according to claim 1, wherein the outlet port No. 1 and the outlet port No. 2 are separated from each other by a partition wall, the inlet port No. 1, the inlet port No. 2, the inlet port No. 3, the inlet port No. 4, the inlet port No. 5 and the inlet port No. 6 are provided with inlet flanges, the outlet port No. 1 and the outlet port No. 2 are provided with outlet flanges, and the inlet flanges and the outlet flanges are arranged in parallel.

3. The pulse exhaust manifold assembly according to claim 2, wherein the outlet flanges of outlets No. 1 and No. 2 are left-right symmetrical nostril-shaped in cross-section.

4. The pulse exhaust manifold assembly according to claim 1, wherein the front side of the front exhaust manifold is provided with a No. 1 EGR gas taking port, the middle exhaust manifold is provided with a No. 2 EGR gas taking port at a position close to the No. 2 gas outlet, the No. 1 EGR gas taking port can be communicated with a No. 1 gas inlet, a No. 2 gas inlet and a No. 3 gas inlet, and the No. 2 EGR gas taking port can be communicated with a No. 4 gas inlet, a No. 5 gas inlet and a No. 6 gas inlet.

5. The pulse exhaust manifold assembly according to any one of claims 1 to 4, wherein the flow passages corresponding to the inlet ports No. 2, No. 3 and No. 5 are horn-shaped structures; and the flow channel corresponding to the No. 4 air inlet is of an inverted s-shaped structure.