CN214366369U

CN214366369U - Supercharger bypass device and engine

Info

Publication number: CN214366369U
Application number: CN202022901346.2U
Authority: CN
Inventors: 高书贞; 李德胜
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2020-12-04
Filing date: 2020-12-04
Publication date: 2021-10-08
Anticipated expiration: 2030-12-04

Abstract

The utility model discloses a booster bypass device and engine, wherein booster bypass device includes booster subassembly and bypass subassembly, and the bypass subassembly sets up in the outside of booster subassembly. The supercharger assembly comprises a high-pressure-stage supercharger, a low-pressure-stage supercharger and a middle gas transmission pipeline which is connected with a gas outlet of the high-pressure-stage supercharger and a gas inlet of the low-pressure-stage supercharger. The bypass assembly comprises a bypass pipeline and a waste gas bypass valve which is arranged on the bypass pipeline and controls the bypass pipeline to be opened and closed, the air inlet of the bypass pipeline is connected with the upstream pipeline of the high-pressure supercharger, and the air outlet of the bypass pipeline is connected with the middle gas transmission pipeline. Through arranging the bypass subassembly in the bypass subassembly outside outward, and connect high pressure booster upper reaches and low pressure level booster upstream position through the bypass pipeline, the size of bypass pipeline is not influenced by bypass subassembly internal environment, to the higher engine of liter power requirement, can realize the increase of bypass waste gas volume, and then improve the reliability of booster.

Description

Supercharger bypass device and engine

Technical Field

The utility model relates to the technical field of engines, in particular to booster bypass device. The utility model discloses still relate to an engine including above-mentioned booster bypass device.

Background

The supercharger of the engine compresses air in advance before the air is supplied into a cylinder so as to improve the air density and increase the air intake quantity.

The engine with higher power-per-liter requirement generally needs two-stage supercharging to meet the performance index requirement, the conventional supercharger is an integrated supercharger, the supercharger generally adopted by the engine with large discharge capacity, high power and high torque is large, the amount of waste gas required by bypass is large in the same waste gas flow, and the internal space of the integrated supercharger is certain, so that the waste gas bypass structure integrated with the supercharger cannot meet the requirement, and the reliability of the supercharger is further reduced.

Therefore, how to improve the reliability of the supercharger is a technical problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a booster bypass device to improve the reliability of booster. Another object of the present invention is to provide an engine including the above supercharger bypass device.

In order to achieve the above object, the utility model provides a supercharger bypass device, include:

the supercharger assembly comprises a high-pressure-stage supercharger, a low-pressure-stage supercharger and an intermediate gas transmission pipeline which is connected with a gas outlet of the high-pressure-stage supercharger and a gas inlet of the low-pressure-stage supercharger;

and the bypass assembly is arranged outside the supercharger assembly, comprises a bypass pipeline and is installed on the bypass pipeline, and controls the waste gas bypass valve opened and closed by the bypass pipeline, the air inlet of the bypass pipeline is connected with the upstream pipeline of the high-pressure supercharger, and the air outlet of the bypass pipeline is connected with the middle gas transmission pipeline.

Preferably, the wastegate valve is located at an air outlet of the bypass duct.

Preferably, the wastegate valve is an electrically controlled valve.

Preferably, the high-pressure stage supercharger is of an integrated structure.

Preferably, the low-pressure stage supercharger is of an integral structure.

Preferably, the number of the low-pressure-stage superchargers is two, the middle gas transmission pipeline is a Y-shaped pipeline, and the high-pressure-stage superchargers and the low-pressure-stage superchargers are in one-to-one correspondence with three ports of the Y-shaped novel pipeline respectively.

Preferably, the air outlet of the bypass pipeline is communicated with the intersection position of the three branches of the Y-shaped pipeline.

Preferably, the bypass duct is located below the intermediate gas duct.

Preferably, the booster component is free of a bleed valve.

An engine comprising a supercharger bypass apparatus, the supercharger bypass apparatus being any one of the supercharger bypass apparatuses described above.

In the technical solution, the utility model provides a booster bypass device includes booster subassembly and bypass subassembly, and the bypass subassembly sets up in the outside of booster subassembly. The supercharger assembly comprises a high-pressure-stage supercharger, a low-pressure-stage supercharger and a middle gas transmission pipeline which is connected with a gas outlet of the high-pressure-stage supercharger and a gas inlet of the low-pressure-stage supercharger. The bypass assembly comprises a bypass pipeline and a waste gas bypass valve which is arranged on the bypass pipeline and controls the bypass pipeline to be opened and closed, the air inlet of the bypass pipeline is connected with the upstream pipeline of the high-pressure supercharger, and the air outlet of the bypass pipeline is connected with the middle gas transmission pipeline.

According to the supercharger bypass device, the bypass assembly is arranged outside the supercharger assembly, the upstream position of the high-pressure supercharger and the upstream position of the low-pressure supercharger are connected through the bypass pipeline, the size of the bypass pipeline is not affected by the environment in the supercharger assembly, bypass waste gas can be increased for an engine with high power rise requirement, and the use performance of the engine is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a three-dimensional structural diagram of a supercharger bypass device according to an embodiment of the present invention;

fig. 2 is a schematic view of another perspective structure of a supercharger bypass device according to an embodiment of the present invention;

fig. 3 is a diagram of relative positions of the intermediate gas transmission pipeline and the wastegate valve according to the embodiment of the present invention.

Wherein in FIGS. 1-3: 1-high pressure stage supercharger, 2-low pressure stage supercharger, 3-low pressure stage supercharger, 4-middle gas transmission pipeline, 5-bypass pipeline and 6-waste gas bypass valve.

Detailed Description

The core of the utility model is to provide a booster bypass device to improve the reliability of booster. The other core of the utility model is to provide an engine including above-mentioned booster bypass device.

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and embodiments.

Please refer to fig. 1 to fig. 3.

In a specific implementation mode, the utility model discloses the booster bypass device that specific embodiment provided includes booster subassembly and bypass subassembly, and the bypass subassembly sets up in the outside of booster subassembly. In particular, the bypass assembly may be disposed on an upper side of the supercharger assembly, or on a lower side of the supercharger assembly.

The supercharger component comprises a high-pressure supercharger 1, low-

pressure superchargers

2 and 3 and a middle gas transmission pipeline 4 for connecting the gas outlet of the high-pressure supercharger 1 and the gas inlets of the low-

pressure superchargers

2 and 3. In particular, the intermediate gas duct 4 may be a linear duct. Preferably, the high-pressure stage supercharger 1 is of an integral structure. Preferably, the low-

pressure stage superchargers

2 and 3 are of an integrated structure.

The bypass assembly comprises a bypass pipeline 5 and a waste gas bypass valve 6 which is arranged on the bypass pipeline 5 and controls the bypass pipeline 5 to be opened and closed, an air inlet of the bypass pipeline 5 is connected with an upstream pipeline of the high-pressure-stage supercharger 1, and an air outlet of the bypass pipeline 5 is connected with the middle gas transmission pipeline 4. According to the actual arrangement requirement, one of the air inlet and the air outlet of the bypass pipeline 5 is positioned above the supercharger assembly, and the other is positioned below the supercharger assembly. In order to improve the sealing property and the assembling efficiency of the bypass device of the supercharger, it is preferable that the bypass duct 5 has an integrally molded structure.

In order to improve the valve control accuracy, it is preferable that the wastegate valve 6 is an electrically controlled valve. Specifically, the opening and closing of the wastegate valve 6 are controlled in the same manner as the conventional wastegate valve 6 according to the engine temperature and the engine speed, and the present application is not limited specifically.

It can be known from the above description that in the supercharger bypass device provided in this embodiment of the present application, through arranging the bypass assembly outside the supercharger assembly, and connecting the upstream of the high-pressure supercharger and the upstream of the low-

pressure supercharger

2 and 3 through the bypass pipe 5, the size of the bypass pipe 5 is not affected by the environment inside the supercharger assembly, and for an engine with a high power-up requirement, the bypass exhaust gas amount can be increased, that is, the requirement for the amount of released gas is met, so that the reliability of the supercharger is ensured, and the overspeed of the supercharger on the plateau is prevented at the same time.

In order to prevent exhaust gas flowing to the low-

pressure stage superchargers

2, 3 from reversely entering the bypass duct 5, a wastegate valve 6 is preferably located at the outlet of the bypass duct 5. Of course, the wastegate valve 6 may be disposed at an intermediate position of the bypass duct 5 or at an intake port position in accordance with an internal configuration of the engine at the time of specific assembly.

In one embodiment, there may be one low-pressure stage supercharger 2, 3, and preferably, there are two low-

pressure stage superchargers

2, 3. The two low-

pressure stage superchargers

2 and 3 are arranged in parallel, and preferably, the two low-

pressure stage superchargers

2 and 3 are the same as the gas transmission path of the high-pressure stage supercharger 1.

As shown in fig. 2 and 3, in order to improve the intake uniformity of the two low-pressure-

stage superchargers

2 and 3, preferably, the intermediate gas transmission pipeline 4 is a Y-shaped pipeline, and the high-pressure-stage supercharger 1 and the low-pressure-

stage superchargers

2 and 3 are respectively in one-to-one correspondence with three ports of the Y-shaped novel pipeline. Specifically, the intermediate gas transmission pipeline 4 may be formed by splicing a plurality of sections of pipelines. In order to improve the sealing property and the assembling efficiency of the supercharger bypass device, the intermediate gas transmission pipe 4 is preferably formed integrally.

In order to improve the air inlet uniformity of the two low-

pressure stage superchargers

2 and 3, preferably, the air outlet of the bypass pipeline 5 is communicated with the intersection position of three branches of the Y-shaped pipeline. Specifically, the air outlet of the bypass pipeline 5 is located below the Y-shaped pipeline, and the air outlet direction of the bypass pipeline 5 is perpendicular to the air flow direction in the Y-shaped pipeline.

On the basis of the above schemes, the supercharger assembly is preferably not provided with a vent valve, so that the reliability of the supercharger is further improved.

The high-pressure supercharger 1 adopts the external bypass assembly to bypass waste gas before the vortex, accurately controls the bypass flux of the waste gas, meets the requirement of high-power and high-torque performance, prevents the supercharger from overspeed while ensuring the required energy of the supercharger to do work, and ensures the requirement of an engine on plateau capacity. Meanwhile, the supercharger bypass device is concise in overall arrangement, convenient to arrange and convenient to popularize and use widely.

The application provides an engine including a supercharger bypass device, wherein the supercharger bypass device is any one of the supercharger bypass devices described above. The foregoing describes a specific structure of the supercharger bypass device, and the present application includes the supercharger bypass device, which has the above technical effects.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A supercharger bypass device, comprising:

the supercharger component comprises a high-pressure supercharger (1), low-pressure superchargers (2) and (3) and a middle gas transmission pipeline (4) for connecting a gas outlet of the high-pressure supercharger (1) and gas inlets of the low-pressure superchargers (2) and (3);

and set up in the bypass subassembly in the booster subassembly outside, the bypass subassembly includes bypass pipeline (5) and installs on bypass pipeline (5), control waste gas bypass valve (6) of bypass pipeline (5) switching, the air inlet of bypass pipeline (5) with the upper reaches pipe connection of high-pressure stage booster (1), the gas outlet of bypass pipeline (5) with middle gas transmission pipeline (4) are connected.

2. Supercharger bypass arrangement according to claim 1, characterized in that the wastegate valve (6) is located at the outlet of the bypass duct (5).

3. Supercharger bypass arrangement according to claim 1, characterized in that the wastegate valve (6) is an electrically controlled valve.

4. Supercharger bypass arrangement according to claim 1, characterized in that the high-pressure stage supercharger (1) is of one-piece construction.

5. Supercharger bypass arrangement according to claim 1, characterized in that the low-pressure stage superchargers (2), (3) are of one-piece construction.

6. The supercharger bypass device according to claim 1, wherein the number of the low-pressure superchargers (2) and (3) is two, the intermediate gas transmission pipeline (4) is a Y-shaped pipeline, and the high-pressure supercharger (1) and the two low-pressure superchargers (2) and (3) are respectively in one-to-one correspondence with three ports of the Y-shaped novel pipeline.

7. Supercharger bypass arrangement according to claim 6, characterized in that the outlet of the bypass duct (5) communicates with the intersection of the three branches of the Y-shaped duct.

8. Supercharger bypass arrangement according to claim 1, characterised in that the bypass duct (5) is located below the intermediate gas duct (4).

9. The supercharger bypass apparatus of any one of claims 1-8, wherein the supercharger assembly is free of a bleed valve.

10. An engine comprising a supercharger bypass arrangement, characterised in that the supercharger bypass arrangement is a supercharger bypass arrangement as claimed in any one of claims 1 to 9.