CN118564335A - Automobile engine structure with electric supercharger and turbocharger connected in parallel - Google Patents

Abstract

An automobile engine structure in which an electric supercharger and a turbocharger are connected in parallel comprises an engine, a turbocharger and an electric supercharger; the exhaust pipe L1 of the engine is connected to the turbine assembly of the turbocharger, the compressor assembly of the turbocharger is connected to the electric compressor of the electric supercharger through a first air pipe L4, and the electric compressor is connected to the engine intake pipe L6 through a second air pipe L5; the first air pipe L4 is connected to the engine intake pipe L6 through a third air pipe L7, and a one-way valve is provided on the third air pipe L7, and the one-way valve allows the gas in the first air pipe L4 to enter the engine intake pipe L6 after overcoming the elastic force of the one-way valve. The present invention connects the electric supercharger and the turbocharger in parallel through a unique pipeline and a one-way valve structure therein, and can increase the intake volume through the electric supercharger when the engine is at a low speed, and can give full play to the advantages of the turbocharger when the engine is at a high speed, and the one-way valve structure therein is reasonably arranged.

Description

Automobile engine structure with electric supercharger and turbocharger connected in parallel

Technical Field

The invention belongs to the technical field of automobile engine supercharging, and in particular relates to an automobile engine structure in which an electric supercharger and a turbocharger are connected in parallel.

Background Art

A turbocharger is a boosting device used in automobile engine systems that uses the power of the engine's exhaust gas to increase the engine's intake volume and output power. Turbochargers play an important role in improving engine performance and combustion efficiency, and are widely used in automobiles and other internal combustion engine-driven equipment.

In the prior art, the engine generally uses a turbocharger alone, but the engine power is weak at low speed, and the driving force for generating exhaust gas is insufficient, which makes the turbocharger rotate at a low speed and the supercharging effect is not obvious. There is also a solution of directly using an electric supercharger, which can rely on the electric motor to produce a good supercharging effect when the engine is at low speed, but the power improvement is not obvious when the engine is at high speed. Based on this, the present application further studies the supercharging system in the prior art and proposes a vehicle engine structure in which an electric supercharger and a turbocharger are connected in parallel.

Summary of the invention

In view of the deficiencies in the above prior art, the present invention provides an automobile engine structure in which an electric supercharger and a turbocharger are connected in parallel. The electric supercharger and the turbocharger are connected in parallel through a unique pipeline and a one-way valve structure therein. When the engine is at a low speed, the electric supercharger can increase the intake volume and improve the boosting effect. When the engine is at a high speed, the advantages of the turbocharger can be fully utilized and the boosting effect is good. The one-way valve structure is reasonably arranged and can automatically adjust the opening according to the pressure.

The present invention is solved by the following technical solutions.

A vehicle engine structure with an electric supercharger and a turbocharger connected in parallel, comprising an engine, a turbocharger and an electric supercharger; an exhaust pipe L1 of the engine is connected to a turbine assembly of the turbocharger, a compressor assembly of the turbocharger is connected to an electric compressor of the electric supercharger via a first air pipe L4, and the electric compressor is connected to an engine intake pipe L6 via a second air pipe L5; the first air pipe L4 is connected to an engine intake pipe L6 via a third air pipe L7, and a one-way valve is provided on the third air pipe L7, the one-way valve allows gas in the first air pipe L4 to enter the engine intake pipe L6 after overcoming the elastic force of the one-way valve.

The automobile engine structure in the present application adopts a structure in which an electric supercharger and a turbocharger are connected in parallel. When the engine speed is low, such as when the car is just started, the electric supercharger is used for boosting. At this time, the one-way valve is in a closed state, and the efficiency of the turbocharger is insufficient. The intake volume provided by the turbocharger is also boosted by the electric supercharger, which effectively increases the intake volume of the engine and has a good boosting effect. When the engine speed is high, such as when the car is driving at high speed, the efficiency of the turbocharger is optimal and the intake pressure provided is large. In this state, the intake pressure will overcome the elastic force of the one-way valve, so that the one-way valve is in an open state, so that the boosted intake volume of the turbocharger can be directly supplemented into the engine through the engine intake pipe L6, which has a good boosting effect and can also reduce the pressure of the electric supercharger and reduce energy consumption.

In a preferred embodiment, a fixed component and a movable component are provided in the one-way valve, and an elastic member is provided between the fixed component and the movable component, and the elastic force of the elastic member causes the movable component to be in a closed position; overcoming the elastic force of the elastic member and moving the movable component toward the fixed component can release the closed state of the movable component, allowing airflow to pass through, and at this time, the high-pressure intake air provided by the turbocharger can well meet the boost demand of the engine.

In a preferred embodiment, the one-way valve includes a first sleeve and a second sleeve that are assembled, such as being assembled by bolts after being buckled together, and being sealed with a sealing ring; the first sleeve and the second sleeve have an outward convex structure at the assembly position, specifically, the opposite ends of the first sleeve and the second sleeve have a trumpet-shaped expansion, and the outward convex structure is formed after assembly; the fixed component is positioned in the outward convex structure, and the movable component is movably arranged on the fixed component, and the assembly structure is compact.

In a preferred embodiment, the outer periphery of the fixing assembly is connected to a supporting ring via at least three supporting arms. The supporting ring is assembled on the inner wall of the outer convex structure. A corresponding annular groove is provided on the inner wall. The supporting ring has good stability after assembly and high overall structural strength.

In a preferred embodiment, the outer end face of the movable component is a convex curved surface, which facilitates the passage of airflow with low resistance. A sealing ring is provided on the convex curved surface. When in a closed position, the sealing ring abuts against the inner wall of the first sleeve to achieve sealing. Specifically, it abuts against the trumpet-shaped expansion portion, which has a good sealing effect and also serves as a limit for the movable component.

In a preferred embodiment, the fixed component is provided with a through hole, and the movable component is provided with a sliding rod, and the sliding rod is inserted into the through hole and can move in the through hole. The structure has high assembly stability and good directionality when moving. Preferably, a sliding sleeve can be first assembled in the through hole, and the sliding rod moves in the sliding sleeve, which has good directionality and avoids getting stuck.

In a preferred embodiment, a spring placement cavity is provided on the opposite end surfaces of the fixed component and the movable component, and the elastic member is a spring arranged in the spring placement cavity for providing elastic force.

In a preferred embodiment, the end surface of the fixed component away from the movable component is a convex curved surface with small airflow resistance.

Compared with the prior art, the present invention has the following beneficial effects: it provides an automobile engine structure in which an electric supercharger and a turbocharger are connected in parallel, and the electric supercharger and the turbocharger are connected in parallel through a unique pipeline and a one-way valve structure therein, so that the intake volume can be increased by the electric supercharger when the engine is at a low speed, thereby improving the boosting effect, and the advantages of the turbocharger can be fully utilized when the engine is at a high speed, so that the boosting effect is good, and the one-way valve structure therein is reasonably arranged and can automatically adjust the opening according to the pressure.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram showing the connection relationship of the engine structure of the parallel supercharger in the present invention.

FIG. 2 is a perspective view of a one-way valve according to the present invention.

FIG. 3 is a perspective view of the first sleeve and the second sleeve in the present invention.

FIG. 4 is a cross-sectional view of the one-way valve of the present invention.

FIG. 5 is a three-dimensional view of the one-way valve without the first sleeve in the present invention.

FIG. 6 is a perspective view of the internal structure of the one-way valve of the present invention.

FIG. 7 is a first perspective view of the fixing assembly of the present invention.

FIG. 8 is a second perspective view of the fixing assembly of the present invention.

FIG. 9 is a three-dimensional view of the moving assembly and the spring thereon in the present invention.

FIG. 10 is a reference diagram of an engine structure in one embodiment.

DETAILED DESCRIPTION

The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

In the following embodiments, the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the terms: center, longitudinal, transverse, length, width, thickness, up, down, front, back, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and therefore cannot be understood as limiting the present invention. In addition, the terms: first, second, etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features shown. In the description of the present invention, unless otherwise clearly specified and limited, the terms: install, connect, connect, etc. should be understood in a broad sense, and ordinary technicians in this field can understand the specific meanings of the above terms in this application according to the specific circumstances.

Referring to Figures 1 to 9, the present application involves an automobile engine structure in which an electric supercharger and a turbocharger are connected in parallel, including an engine 1, a turbocharger 2, and an electric supercharger 3; the exhaust pipe L1 of the engine 1 is connected to the turbine assembly 22 of the turbocharger 2, the compressor assembly 21 of the turbocharger 2 is connected to the electric compressor 31 of the electric supercharger 3 through a first air pipe L4, and the electric compressor 31 is connected to the engine intake pipe L6 through a second air pipe L5; the first air pipe L4 is connected to the engine intake pipe L6 through a third air pipe L7, and a one-way valve 4 is provided on the third air pipe L7, which allows the gas in the first air pipe L4 to overcome the elastic force of the one-way valve 4 and enter the engine intake pipe L6.

Specifically, it can be seen from the accompanying drawings that in the present application, a fixed component 45 and a movable component 46 are provided in the one-way valve 4, and an elastic member 48 is provided between the fixed component 45 and the movable component 46, and the elastic force of the elastic member 48 makes the movable component 46 in a closed position; overcoming the elastic force of the elastic member 48 and moving the movable component 46 toward the fixed component 45 can release the movable component 46 from the closed state, allowing airflow to pass through, and at this time, the high-pressure intake air provided by the turbocharger 2 can well meet the boost demand of the engine.

Furthermore, in the present application, the one-way valve 4 includes a first sleeve 41 and a second sleeve 42 that are assembled and formed, such as being assembled by bolts after being buckled together, and are equipped with a sealing ring for sealing; the first sleeve 41 and the second sleeve 42 have an outward convex structure at the assembly position, specifically, the opposite ends of the first sleeve 41 and the second sleeve 42 have a trumpet-shaped expansion, and a convex structure is formed after assembly; the fixed component 45 is positioned in the outward convex structure, and the movable component 46 is movably provided on the fixed component 45, and the assembly structure is compact.

As can be seen from Figures 6 to 8, in the present application, the outer periphery of the fixed component 45 is connected to the support ring 451 through at least three support arms 452, and the support ring 451 is assembled on the inner wall of the outer convex structure, and the inner wall is provided with a corresponding annular groove. The support ring 451 has good stability after assembly and high overall structural strength. In addition, the outer end face of the mobile component 46 is a convex curved surface, which is convenient for airflow to pass through and has low resistance. A sealing ring 461 is provided on the convex curved surface. When in the closed position, the sealing ring 461 abuts against the inner wall of the first sleeve 41 to achieve sealing, specifically, against the trumpet-shaped expansion, which has a good sealing effect and also serves as a limit function for the mobile component 46.

In the present application, the fixed component 45 is provided with a through hole 455, and the movable component 46 is provided with a sliding rod 47. The sliding rod 47 is inserted into the through hole 455 and can move in the through hole 455. The structure has high assembly stability and good directionality when moving. Preferably, a sliding sleeve 471 can be first assembled in the through hole 455, and the sliding rod 47 moves in the sliding sleeve 471, which has good directionality and avoids getting stuck. Furthermore, spring placement cavities are provided on the opposite end faces of the fixed component 45 and the movable component 46, and the elastic member 48 is a spring arranged in the spring placement cavity for providing elastic force. In the present application, the end face of the fixed component 45 away from the movable component 46 is a convex curved surface with low airflow resistance.

FIG. 10 is a reference diagram of an engine structure in an embodiment, wherein the oval circle is a one-way valve 4 .

As can be seen from the above description, the automobile engine structure in the present application adopts a structure in which an electric supercharger and a turbocharger are connected in parallel. When the speed of the engine 1 is low, such as when the car is just started, the electric supercharger 2 is used for boosting. At this time, the one-way valve 4 is in a closed state, and the efficiency of the turbocharger 2 is insufficient. The intake volume provided by the turbocharger 2 is also boosted by the electric supercharger 2, which effectively increases the intake volume of the engine 1 and has a good boosting effect. When the speed of the engine 1 is high, such as when the car is driving at high speed, the efficiency of the turbocharger 2 is optimal and the intake pressure provided is large. In this state, the intake pressure will overcome the elastic force of the one-way valve 4, so that the one-way valve 4 is in an open state, so that the boosted intake volume of the turbocharger 2 can be directly supplemented into the engine through the engine intake pipe L6, which has a good boosting effect and can also reduce the pressure of the electric supercharger and reduce energy consumption.

The innovation of this application lies in the reasonable arrangement of the electric supercharger and the turbocharger, and the provision of a one-way valve with a unique structure, which can be opened under air pressure and has different opening degrees depending on the air pressure. This solution not only solves the problem of weak engine power at low speed, but also improves the engine power at high speed and reduces the fuel consumption of the engine at high speed.

Specifically, in the present application, by connecting the electric supercharger and the turbocharger in parallel, when the engine is at a low speed, although the turbocharger recovers part of the exhaust gas energy, the compressor outlet pressure is still relatively small. At this time, the electric supercharger is controlled to work to increase the engine intake volume. When the engine is at a high speed, the turbocharger receives more exhaust gas from the engine, which can drive the turbocharger to run at a high speed. The compressor outlet pressure is large, so that the engine can get more air. At this time, the engine torque and power are significantly improved.

However, since the electric supercharger and the turbocharger are connected in parallel, the high-pressure gas at the outlet of the electric supercharger compressor may flow back to the outlet of the turbocharger compressor at low speed, causing pressure loss in the engine intake manifold. In order to solve this problem, a one-way valve is arranged at the outlet of the turbocharger compressor in the present application so that the pressure from the electric supercharger no longer flows back to the outlet of the turbocharger compressor at low speed. As the engine speed increases, the high-pressure pressure from the turbocharger gradually increases. When the pressure increases to a level that can overcome the one-way valve closing pressure and the electric supercharger compressor outlet pressure, the one-way valve opens and the engine obtains a greater boost pressure.

When there is no pressure in the one-way valve, the elastic force of the elastic part presses the moving component 46 onto the inner wall of the pipeline. When there is pressure, the elastic force is overcome under the action of pressure, and the moving component 46 moves away from the pipeline and close to the fixed component 45. The moving component 46 is designed to be a curved surface in the direction facing the airflow, and the moving component 46 is designed to be a curved surface in the direction away from the airflow. The space that wraps the sliding element and the fixed element, that is, the convex structure is also a curved surface structure, so as to form a suitable airflow channel and minimize the energy loss of gas flow. The sliding rod 47 is provided to provide support and positioning for the moving component 46 when it is opened and closed.

As described above, the present invention provides an automobile engine structure in which an electric supercharger and a turbocharger are connected in parallel. The electric supercharger and the turbocharger are connected in parallel through a unique pipeline and a one-way valve structure therein. When the engine is at a low speed, the electric supercharger can increase the intake volume and improve the boosting effect. When the engine is at a high speed, the advantages of the turbocharger can be fully utilized and the boosting effect is good. The one-way valve structure is reasonably arranged and can automatically adjust the opening according to the pressure.

The protection scope of the present invention includes but is not limited to the above embodiments. The protection scope of the present invention shall be based on the claims. Any replacement, deformation, and improvement of the technology that can be easily thought of by technicians in this field shall fall within the protection scope of the present invention.

Claims (8)

1. An automobile engine structure with an electric supercharger and a turbocharger connected in parallel is characterized by comprising an engine (1), a turbocharger (2) and an electric supercharger (3);

An exhaust pipe (L1) of the engine (1) is connected to a turbine assembly (22) of a turbocharger (2), a compressor assembly (21) of the turbocharger (2) is connected to an electric compressor (31) of the electric supercharger (3) through a first air pipe (L4), and the electric compressor (31) is connected to an engine air inlet pipe (L6) through a second air pipe (L5);

The first air pipe (L4) is connected to the engine air inlet pipe (L6) through a third air pipe (L7), a one-way valve (4) is arranged on the third air pipe (L7), and the one-way valve (4) allows air in the first air pipe (L4) to overcome the elastic force of the one-way valve (4) and then enter the engine air inlet pipe (L6).

2. An automobile engine structure with an electric supercharger and a turbocharger connected in parallel according to claim 1, characterized in that a fixed component (45) and a movable component (46) are arranged in the check valve (4), an elastic piece (48) is arranged between the fixed component (45) and the movable component (46), and the elastic force of the elastic piece (48) enables the movable component (46) to be in a closed position;

the moving assembly (46) can be released from the closed state by overcoming the elastic force of the elastic piece (48) and moving the moving assembly (46) towards the fixed assembly (45), so that air flow can pass through.

3. An automobile engine structure with parallel connection of an electric supercharger and a turbocharger according to claim 2, wherein the check valve (4) comprises a first sleeve body (41) and a second sleeve body (42) which are assembled and formed, the first sleeve body (41) and the second sleeve body (42) are provided with a convex structure at the assembling position, the fixing component (45) is positioned in the convex structure, and the moving component (46) is movably arranged on the fixing component (45).

4. A parallel connection of an electric supercharger and a turbocharger in an automobile engine structure according to claim 3, characterized in that the outer periphery of the fixing assembly (45) is connected to a support ring (451) by at least three support arms (452), the support ring (451) being fitted to the inner wall of the male structure.

5. A parallel connection of an electric supercharger and a turbocharger according to claim 3, characterized in that the outer end face of the moving assembly (46) is a convex curved face, the convex curved face is provided with a sealing ring (461), and the sealing ring (461) abuts against the inner wall of the first sleeve body (41) to realize sealing when in the closed position.

6. A parallel connection of an electric supercharger and a turbocharger according to claim 3, characterized in that the stationary member (45) is provided with a through hole (455), the moving member (46) is provided with a slide rod (47), and the slide rod (47) is inserted into the through hole (455) and is movable in the through hole (455).

7. A parallel connection of an electric supercharger and a turbocharger according to claim 3, wherein the opposite end surfaces of the fixed assembly (45) and the movable assembly (46) are provided with spring placing cavities, and the elastic member (48) is a spring provided in the spring placing cavities.

8. A parallel connection of an electric supercharger and a turbocharger according to claim 3 wherein the end face of the stationary assembly (45) remote from the moving assembly (46) is a convex curved face.