WO2020248304A1

WO2020248304A1 - Rotor engine having variable gas inlet channel

Info

Publication number: WO2020248304A1
Application number: PCT/CN2019/092876
Authority: WO
Inventors: 范宝伟; 张耀元; 王远光; 潘剑锋
Original assignee: 江苏大学
Priority date: 2019-06-13
Filing date: 2019-06-26
Publication date: 2020-12-17
Also published as: CN110344933B; CN110344933A

Abstract

A rotor engine that has a variable gas inlet channel, comprising a variable gas inlet channel mechanism (1) which is installed at the gas inlet of the rotor engine and is used for changing the start time and/or gas intake duration of the rotor engine. The variable gas inlet channel mechanism (1) comprises a housing, a plurality of lifting blocks (19, 20, 21, 22), a fixed gas inlet pipe (17) and movable sliding blocks (23, 28). The housing is mounted at the gas inlet of the rotor engine, and is internally provided with the fixed gas inlet pipe (17); the bottom part of the fixed gas inlet pipe (17) is fixed to a horizontal sliding groove (18), and the plurality of lifting blocks (19, 20, 21, 22) penetrate the horizontal sliding groove (18); the movable sliding blocks (23, 28) are mounted on the horizontal sliding groove (18), and by means of the movement of the movable sliding blocks (23, 28), the plurality of lifting blocks (19, 20, 21, 22) are moved up and down in the housing.

Description

Rotary engine with variable inlet

Technical field

The present invention relates to the technical field of rotary engines, and in particular to a rotary engine with a variable intake port.

Background technique

For the engine, the requirements for the valve mechanism are: First, it should ensure good air exchange in the cylinder, high inflation efficiency, and low air exchange loss. In addition, the valve train should also change the intake phase and amount in time according to the different operating conditions of the engine. For example, as the throttle opening of the engine continues to increase, it indicates that the engine needs to output more power to meet The actual need means that the engine needs to burn more fuel in the working cycle. However, the fuel supply in the engine working cycle is determined by the intake air volume of the engine. That is to say, it is necessary to continuously increase the charge coefficient of the engine to meet the working requirements of the engine under the working condition of the increasing throttle opening of the engine. For another example, when the emission of soot particles in the engine exhaust is constantly increasing, it is necessary to continuously increase the residual exhaust gas coefficient and exhaust gas recirculation rate (EGR, Exhaust Gas Recirculation) to reduce the emission of soot particles in the engine exhaust. This requires the engine to continue to advance the start of air intake under this working condition. In order to make the valve train meet the above-mentioned requirements of the engine, a variety of variable valve trains have been successfully applied on the reciprocating piston engine, and good results have been obtained. For a rotary engine, it also needs a variable valve train to improve the intake and exhaust process.

However, the traditional rotary engine mainly completes the intake and exhaust process through the cooperation of the rotor and the cylinder. Therefore, the traditional rotary engine does not have the complicated valve mechanism of the reciprocating engine. For traditional rotary engines, the absence of a complicated valve mechanism can make it have the advantages of fewer parts and good high-speed performance, but at the same time it leads to the inability to adjust the intake phase and intake duration, which improves its performance. Is unfavorable. Therefore, how to invent a variable valve mechanism suitable for the rotary engine according to the working principle of the rotary engine intake process is an urgent problem to be solved.

Summary of the invention

In view of the deficiencies in the prior art, the present invention provides a rotary engine with a variable intake passage, which uses the opening and closing of the variable intake passage to change the start time and duration of the intake of the rotary engine.

The present invention achieves the above technical objectives through the following technical means.

A rotary engine with a variable intake port, which is characterized by comprising a variable intake port mechanism, which communicates with the intake port of the rotary engine, and is adjusted by adjusting the variable intake port mechanism. , To change the intake start time or/and intake duration of the rotary engine.

Further, the variable intake passage mechanism includes a housing, a number of lifting sliders, a fixed intake pipe and a moving slider; the housing is installed at the intake port of the rotary engine, and the housing is provided with a fixed intake pipe, A horizontal sliding groove is fixed at the bottom of the fixed air intake pipe, a number of the lifting sliders penetrate into the horizontal sliding groove, and a movable sliding block is installed on the horizontal sliding groove. The slider moves up and down in the housing.

Further, one end of any one of the lifting sliders is connected to the inside of the housing through an elastic reset device, and the other end of any one of the lifting sliders is a curved surface, and the curved surface is similar to the combustion chamber cylinder when the lifting slider is not moving. Face to face.

Further, the two ends of the transverse chute are respectively pierced with the lifting slider; the transverse chute is provided with sliders symmetrically along the fixed intake pipe, and the slider is moved by the slider to make the two ends of the transverse chute The lifting slides are lifted and lowered in the shell simultaneously or separately.

Further, the crankshaft angles corresponding to the arc surfaces of the lower ends of any of the lifting sliders are the same when the rotor passes.

Further, it also includes a sealing strip group and a sealing baffle group. The transverse sliding groove and the casing are sealed by the sealing strip group; any one of the lifting sliders is provided with a sealing baffle group on both sides, and the edge of the sealing baffle group A raised part is provided for fixing on the inner wall of the housing; the sealing baffle set is provided with a sliding block moving space and a horizontal air inlet channel; the horizontal sliding groove penetrates the sliding block moving space; a number of the lifting sliders Penetrate into the moving space of the slider, and make the transverse air inlet channel conduct through the lifting slider.

Further, a wedge-shaped surface notch is provided in the lifting slider, and the wedge-shaped surface notch is wedge-shaped with the slider.

Furthermore, it also includes a transmission system. At least one of the transmission systems is connected to the sliding block in transmission to move the sliding block.

Further, it also includes a control center ECU and a sensor, at least one sensor is used to detect the throttle opening or the content of soot particles in the engine exhaust; the control center ECU according to the throttle opening of the rotor or the engine exhaust The content of soot particles is used to control the variable intake mechanism.

Further, when a sensor detects that the throttle opening is less than the set value, the control center ECU controls the variable intake port mechanism to change the intake duration of the rotary engine; when a sensor detects that the throttle opening is greater than the set value, The control center ECU controls the variable intake port mechanism to change the intake start time and intake duration of the rotary engine; when a sensor detects that the content of soot particles in the engine exhaust is greater than the set value, the control center ECU can control The variable intake port mechanism changes the intake start time of the rotary engine.

The beneficial effects of the present invention are:

1. The variable inlet rotary engine of the present invention is based on the mechanical movement of the slider and the wedge surface, and the opening and closing of the variable inlet passage can provide suitable air intake for different working conditions of the rotary engine. The start time and the duration of intake air allow the rotary engine to obtain sufficient intake air under any operating conditions.

2. In the variable-intake rotary engine of the present invention, the throttle opening signal and soot particle concentration are collected by the sensor and fed back to the ECU, and then the rotary engine's intake start time and intake duration are adjusted through the automatic actuator period. The adoption of this automatic system enables the variable air inlet designed by the present invention to realize rapid and accurate adjustment.

3. In the variable inlet rotor engine of the present invention, the falling position of the lifting slider can be restricted through the transverse slide groove, and the slide rail is laid on the upper surface of the transverse slide groove, and the transverse slide groove is sealed with the periphery of the shell Function to prevent gas from escaping upward.

4. In the variable inlet rotor engine of the present invention, the lower end surfaces of the lifting slider and the sealing baffle are consistent with the cylinder block of the engine combustion chamber. When the lifting slider is in a non-moving state, it will not cause the cylinder The change of the body wall then affects the flow field in the cylinder.

Description of the drawings

Fig. 1 is the assembly diagram of the variable inlet rotary engine according to the present invention.

Figure 2 is an exploded view of the variable air inlet mechanism of the present invention.

Fig. 3 is a cross-sectional view of the variable intake passage mechanism of the present invention.

Fig. 4 is a working state diagram of the variable intake passage mechanism according to the present invention, wherein Fig. 4a, Fig. 4b, Fig. 4c, Fig. 4d and Fig. 4e show the state of the variable intake passage mechanism under different working conditions.

Fig. 5 is a schematic diagram of the automatic control according to the present invention.

Fig. 6 is a structural diagram of the fixed intake pipe according to the present invention.

Fig. 7 is a structural diagram of the slider according to the present invention.

Fig. 8 is a structural diagram of the lifting slider according to the present invention.

Fig. 9 is a structural diagram of the sealing baffle set according to the present invention.

In the picture:

1- Variable intake port mechanism; 2- exhaust port; 3- combustion chamber cylinder block; 4- scale; 5- left slider toggle switch; 6-cylinder block bolt; 7- front cover plate; 8- rear End cover plate; 9-left end cover plate; 10-right end cover plate; 11-upper end cover plate; 12-cover plate bolt; 13-sealing strip group; 14-cover plate groove; 15-seal baffle group; 16- Edge convex part; 17-fixed intake pipe; 18-transverse chute; 19-first left lifting block; 20-second left lifting block; 21-first right lifting block; 22-second right lifting block; 23 -Left slider; 24-Curved surface; 25-Horizontal intake passage; 26-Throttle valve opening sensor; 27-Spring group; 28-Right slider; 29-First left variable intake passage; 30-No. Two left variable intake passages; 31-first right variable intake passage; 32-second right variable intake passage; 33-rail; 34-wedge surface; 35-combustion chamber cylinder block profile; 36- 37-Second control motor; 38-First gear; 39-Second gear; 40-First rack; 41-Second rack; 42- Slider groove; 43-ECU; 44 -Right slider toggle switch; 45- Soot particle sensor.

Detailed ways

The present invention will be further described below in conjunction with the drawings and specific embodiments, but the protection scope of the present invention is not limited to this.

As shown in Figures 1 and 2, the variable intake port rotary engine of the present invention includes a variable intake port mechanism 1, an exhaust port 2 and a combustion chamber cylinder block 3. The variable intake port The mechanism 1 installs the intake port of the rotary engine through the cylinder bolt 6 to change the intake start time or the intake duration of the rotary engine, and can also change the intake start time and the intake duration at the same time.

As shown in Figures 2 and 3, the variable air intake mechanism 1 includes a housing, a number of lifting sliders, a fixed air intake pipe 17, a left slider 23 and a right slider 28; the housing includes a front cover 7. Rear end cover 8, left end cover 9, right end cover 10 and upper end cover 11; the front end cover 7, rear end cover 8, left end cover 9, right end cover 10 and upper end cover 11 It is connected by the cover bolt 12 to form a closed space. The inner surfaces of the left end cover plate 9 and the right end cover plate 10 are provided with clamping grooves. The casing is installed at the air inlet of the rotary engine. The bottom of the fixed intake pipe 17 is fixed with a transverse slide groove 18. The two ends of the transverse slide groove 18 are respectively installed in the inner surface of the left end cover plate 9 and the right end cover plate 10, and the top of the fixed intake pipe 17 passes through the upper end cover plate. 11 is connected to the intake pipe. As shown in FIG. 6, a guide rail 33 is provided on the transverse sliding groove 18. The left end of the lateral sliding groove 18 penetrates the first left lifting block 19 and the second left lifting block 20 in sequence; the right end of the lateral sliding groove 18 penetrates the first right lifting block 21 and the second right lifting block 22 in sequence; The transverse sliding groove 18 is symmetrically provided with a left slider 23 and a right slider 28 along the fixed intake pipe 17, and the bottom of the left slider 23 and the right slider 28 is provided with a slider groove 42 that cooperates with the guide rail 33, passing through the left slider 23 The movement is used for lifting the first left lifting block 19 and the second left lifting block 20 in sequence in the housing. The movement of the right sliding block 28 is used to sequentially lift the first right lifting block 21 and the second right lifting block 22 in the housing. Based on the mechanical movement of the slider and the wedge-shaped surface, the opening and closing of the variable intake passage can provide suitable intake start time and intake duration for different working conditions of the rotary engine, so that the rotary engine can be Sufficient air intake can be obtained.

As shown in Figures 3 and 8, one end of any one of the lifting sliders is connected to the upper end cover 11 through a spring set 27, the other end of any one of the lifting sliders is a curved surface 24, and the curved surface 24 is sliding When the block is not moving, it coincides with the profile 35 of the combustion chamber. A notch is provided inside the lifting slider, and the notch is used to penetrate the transverse sliding groove 18. The upper surface of the notch is a wedge-shaped surface 34, and the notch of the wedge-shaped surface 34 is wedge-shaped with the left slider 23 or the right slider 28. The corresponding crankshaft angles of the rotor passing through the arc surface 24 at the other end of any of the lifting sliders are the same.

As shown in Figures 2 and 9, in order to ensure the sealing performance of the rotary engine during operation, the present invention also includes a sealing strip group 13 and a sealing baffle group 15, between the front cover 7 and the rear cover 8 and the transverse slide groove 18. The sealing effect is achieved through the combination of the sealing strip group 13 and prevents gas from overflowing. A sealing baffle set 15 is provided on both sides of any one of the lifting sliders, and the edge of the sealing baffle set 15 is provided with a raised part 16, and the sealing baffle set 15 passes through the edge raised part 16 and the front end cover 7 and the rear The groove 14 on the end cover plate 8 is embedded to achieve fixation. The sealing baffle set 15 is provided with a sliding block moving space and a horizontal air inlet passage 25; the horizontal sliding groove 18 penetrates into the sliding block moving space; a number of the lifting blocks penetrate into the sliding block moving space and pass through the lifting block The lateral intake passage 25 is turned on. The sealing baffle group 15 limits the position of the transverse plate 18 in the vertical direction. The sealing baffle 15 ensures that the left and right lifting blocks can only move linearly along the vertical direction. The sealing baffle set 15 is provided with a transverse air inlet passage 25. When the lifting slider is raised, the transverse air inlet passage 25 is opened; when the lifting slider is lowered, the lateral air inlet passage 25 is closed. For example, when the first left lifting block 19 is raised, the lateral air inlet passage 25 is opened, and when the first left lifting block 19 falls back to the original position, the lateral air inlet channel 25 is closed by the side of the first left lifting block 19.

The lower end surfaces of the lifting slider and the sealing baffle group 15 coincide with the cylinder block surface 35 of the engine combustion chamber. When the lifting slider is in the descending state, the cylinder wall surface will not be changed and the flow field in the cylinder will not be affected. For example: in Fig. 3, the shape of the arc surface 24 under the first left lifting block 19 is completely consistent with the cylinder profile 35 of the combustion chamber. When the arc surface 24 under the first left lifting block 19 is in the descending state, the arc surface 24 and the combustion chamber The cylinder profile 35 forms a smooth curved surface.

As shown in Figures 5 and 7, the left slider 23 and the right slider 28 are respectively provided with a left slider toggle switch 5 and a right slider toggle switch 44 for making the left slider 23 or the right slider 28 moves. The left slider toggle switch 5 moves in the chute on the front cover 7, the right slider toggle switch moves in the chute on the rear cover 8, the front cover 7 and the rear cover A ruler 4 is provided on 8 for displaying the moving distance of the left slider 23 or the right slider 28. The left slider toggle switch 5 and the right slider toggle switch 44 can be operated manually or automatically. At least one transmission system is drivingly connected with the left slider toggle switch 5 and the right slider toggle switch 44 to move the left slider 23 or/and the right slider 28. The transmission system includes a first control motor 36, a second control motor 37, a first gear 38, a second gear 39, a first rack 40 and a second rack 41; the first gear 38 and the first rack 40 meshes, the second gear 39 meshes with the second rack 41, the first control motor 36 is drivingly connected to the first gear 38, and the second control motor 37 is drivingly connected to the second gear 39. The first rack 40 is connected with the right slider 28, and the second rack 41 is connected with the left slider 23.

It also includes a control center ECU43 and sensors, at least one sensor is used to detect the throttle opening or the content of soot particles in the engine exhaust; the control center ECU43 is based on the throttle opening or the soot particles in the engine exhaust The content is used to control the variable intake port mechanism 1. When a sensor detects that the throttle opening is less than the set value, the control center ECU 43 controls the variable intake port mechanism 1 to change the intake duration of the rotary engine; when a sensor detects that the throttle opening is greater than the set value, the The control center ECU43 controls the variable intake port mechanism 1 to change the start time and duration of intake of the rotary engine; when a sensor detects that the content of soot particles in the engine exhaust is greater than the set value, the control center ECU43 can control the The variable intake port mechanism 1 changes the intake start time of the rotary engine.

working principle:

The invention can realize three functions

1. The start time of intake is unchanged, and the duration of intake is changed;

When the throttle opening sensor 26 detects that the throttle opening of the rotary engine is less than 50%, as the throttle opening increases, in order to increase the charge coefficient of the engine, it is necessary to extend the intake duration, as shown in Figure 4a→ As shown in 4b, when the control center ECU43 receives the throttle opening signal, the second control motor 37 controls the second gear 39 to rotate clockwise, and uses the second rack 41 to drive the left slider 23 to move to the left, sliding left The block 23 pushes up the first left lifting block 19, and the first left variable air intake passage 29 is opened to achieve the extension of the air intake duration. It is possible to continue to control the left sliding block 23 to move to the left as required, so as to continue to push up the second left lifting block 20 and open the second left variable air intake passage 30.

2. The start time of intake changes and the duration of intake changes

When the throttle opening of a rotary engine is greater than 50%, as the throttle opening increases, in order to increase the charge coefficient of the engine, it is necessary to advance the intake phase and extend the intake duration at the same time, as shown in Figure 4d→4e As shown, when the control center ECU43 receives the throttle opening signal, the second gear 39 is controlled to rotate clockwise through the second control motor 37, and the second rack 41 is used to drive the left slider 23 to move to the left. The first left lifting block 19 is lifted up by 23, and the first left variable intake passage 29 is opened to realize the extension of the intake duration. Through the first motor 36 to control the first gear 38 to rotate counterclockwise, the movement of the first rack 40 drives the right slider 28 to move to the right to lift the first right lifting block 21, and the first right variable air inlet passage 31 opens, The start time of air intake is advanced. You can continue to control the left slider 23 to move to the left and the right slider 28 to move to the right as needed.

3. The start time of intake changes, and the duration of intake does not change

When the emission of soot particles in the exhaust gas emitted by the rotary engine is greater than 4.5mg/km, the residual exhaust gas coefficient and the exhaust gas recirculation rate EGR need to be increased, and more exhaust gas is remixed into the fresh mixture of the next cycle of the engine In the process, the soot particles contained in the exhaust gas are burned again to reduce the emission of soot particles. At this time, it is necessary to advance the start time of the intake and the duration of the intake is unchanged. Specifically: as shown in Figure 4b→4c, when it is detected that the emission of soot particles is greater than 4.5mg/km, the second control motor 37 controls the second gear 39 to rotate counterwise, and the second rack 41 drives the left The sliding block 23 moves to the right, the first left lifting block 19 is reset, and the first left variable air intake passage 29 is closed. Through the first motor 36 to control the first gear 38 to rotate counterclockwise, the movement of the first rack 40 drives the right slider 28 to move to the right to lift the first right lifting block 21, and the first right variable air inlet passage 31 opens, The intake start time is advanced, and the intake duration remains unchanged.

The embodiments are the preferred embodiments of the present invention, but the present invention is not limited to the above-mentioned embodiments. Without departing from the essence of the present invention, any obvious improvements, substitutions, or substitutions can be made by those skilled in the art. All variants belong to the protection scope of the present invention.

Claims

A rotary engine with a variable intake port, which is characterized by comprising a variable intake port mechanism (1), which communicates with the intake port of the rotary engine, and by adjusting the The variable intake port mechanism changes the intake start time or/and intake duration of the rotary engine.
The variable intake port rotary engine according to claim 1, wherein the variable intake port mechanism (1) includes a housing, a number of lifting sliders, a fixed intake pipe (17) and a slider ( 23, 28); The housing is installed at the air inlet of the rotary engine, the housing is provided with a fixed intake pipe (17), the bottom of the fixed intake pipe (17) is fixed with a transverse slide groove (18), and a number of The lifting slider is installed on the transverse chute (18), and a movable slider (23, 28) is installed on the transverse chute (18), and the slider (23, 28) is moved to make A number of the lifting sliders are raised and lowered in the housing.
The rotary engine with variable intake ports according to claim 2, wherein one end of any one of the lifting sliders is connected to the inside of the housing through an elastic reset device, and the other end of any one of the lifting sliders is curved (24), the arc surface (24) coincides with the cylinder body profile (35) of the combustion chamber when the lifting slider is not moving.
The variable air intake rotary engine according to claim 2, characterized in that the lifting sliders are installed at both ends of the transverse sliding groove (18); the transverse sliding groove (18) is fixed along the intake pipe (17) Sliding blocks (23, 28) are symmetrically provided, which are moved by the sliding blocks (23, 28) to enable the lifting sliding blocks at both ends of the transverse sliding groove (18) to be raised and lowered in the housing simultaneously or separately.
The variable inlet rotary engine according to claim 3, characterized in that the crankshaft rotation angles corresponding to the arc surface (24) of the lower end of any of the lifting sliders are the same when the rotor passes.
The variable inlet rotary engine according to any one of claims 2-5, further comprising a sealing strip group (13) and a sealing baffle group (15), the transverse sliding groove (18) It is sealed with the casing through a sealing strip group (13); any one of the lifting sliders is provided with a sealing baffle group (15), and the edge of the sealing baffle group (15) is provided with a convex part (16), Used for fixing on the inner wall of the housing; the sealing baffle group (15) is provided with a sliding block moving space and a transverse air inlet channel (25); the horizontal sliding groove (18) penetrates the sliding block moving space; The lifting sliding block penetrates into the moving space of the sliding block, and the horizontal air inlet passage (25) is conducted through the lifting sliding block.
The variable-intake rotary engine according to any one of claims 2-5, wherein a wedge-shaped surface (34) gap is provided in the lifting slider, and the wedge-shaped surface (34) gap is connected to the sliding block. The blocks (23, 28) fit in a wedge shape.
The variable-intake rotary engine according to any one of claims 2-5, further comprising a transmission system, at least one of the transmission systems is in transmission connection with the slider (23, 28), so that the slider (23, 28) Move.
The variable intake rotary engine according to claim 1, further comprising a control center ECU (43) and sensors, at least one sensor is used to detect the throttle opening or to detect carbon in the engine exhaust The content of smoke particles; the control center ECU (43) is used to control the variable intake port mechanism (1) according to the throttle opening of the rotor or the content of soot particles in the engine exhaust.
The variable intake port rotary engine according to claim 9, wherein when a sensor detects that the throttle opening is less than the set value, the control center ECU (43) controls the variable intake port mechanism (1 ) Change the intake duration of the rotary engine; when a sensor detects that the throttle opening is greater than the set value, the control center ECU (43) controls the variable intake port mechanism (1) to change the intake start time of the rotary engine and Intake duration: When a sensor detects that the content of soot particles in the engine exhaust is greater than the set value, the control center ECU (43) controls the variable intake port mechanism (1) to change the start time of the intake of the rotary engine.