Turbocharging air intake and exhaust structure of engine

Abstract

The utility model belongs to the technical field of turbocharged engines, and provides a turbocharged intake and exhaust structure of an engine, which is characterized in that an intake manifold and an exhaust gas turbocharger are respectively arranged on two opposite sides of an engine main body, and the air outlet end of the intake manifold is communicated with the air inlet end of the engine main body; a waste gas inlet of the waste gas turbocharger communicates with the exhaust end of the engine body, and an air inlet of the waste gas turbocharger communicates with the air inlet end of the air inlet manifold after being connected with the intercooler in series. A knock sensor is installed on an engine body, an air inlet electromagnetic valve is arranged on an air inlet of an exhaust gas turbocharger, the signal input end of a controller is connected with the signal output end of the knock sensor, and the signal output end of the controller is connected with the air inlet electromagnetic valve. The high compression ratio of the engine main body can be guaranteed, the output power of the engine main body is large, and the problem of detonation can be avoided.

Description

TECHNICAL FIELD

[0001] A turbocharged intake and exhaust structure of an engine belongs to the technical field of turbocharged engines. BACKGROUND

[0002] Snowmobiles usually use reciprocating piston engines, and four-stroke engines or two-stroke engines are used according to the weight. The engine of the snowmobile is usually a small displacement engine, and the engine drives the track to rotate, and then drives the snowmobile to move through the track.

[0003] The existing snowmobile usually has a small displacement engine, and the small displacement engine has a small cylinder volume, which leads to the increase of the compression ratio when using the exhaust turbocharger, and the knock is easily caused, and the engine is knocked.

[0004] Due to the problem that the existing small displacement engine is prone to knock, the power of the engine cannot be fully developed, and the thermal efficiency of the engine is low. If the power of the engine is increased, the only way is to increase the displacement, and the increase of the engine displacement will inevitably lead to the increase of the volume. The installation space of the snowmobile is limited, which affects the installation of the large displacement engine, and the power of the existing snowmobile is greatly limited. CONTENT OF THE UTILITY MODEL

[0005] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art, provide a turbocharged intake and exhaust structure of an engine which can directly install an exhaust turbocharger on a small displacement engine, can ensure the output power of the engine, and can avoid knock.

[0006] The utility model solves the technical problems by adopting the following technical scheme: a turbocharged intake and exhaust structure of an engine, which comprises an intake manifold, an exhaust turbocharger, a knock sensor, a controller and an intake electromagnetic valve arranged on an engine main body, the intake manifold and the exhaust turbocharger are arranged on opposite sides of the engine main body, the exhaust end of the intake manifold is in communication with the intake end of the engine main body, the exhaust inlet of the exhaust turbocharger is in communication with the exhaust end of the engine main body, and the air inlet of the exhaust turbocharger is in communication with the intake end of the intake manifold after being connected in series with an intercooler; the knock sensor is installed on the engine main body, the intake electromagnetic valve is arranged on the air inlet of the exhaust turbocharger, the signal input end of the controller is connected with the signal output end of the knock sensor, and the signal output end of the controller is connected with the intake electromagnetic valve.

[0007] Further, first and second sensors are arranged at the intake end and the exhaust end of the throttle valve of the intake manifold, respectively, and the signal output ends of the first and second sensors are connected with the signal input end of the controller.

[0008] Further, the exhaust bypass valve is arranged at the exhaust inlet of the exhaust turbocharger, and the driving assembly is connected with the exhaust bypass valve, and the signal output end of the controller is connected with the driving assembly.

[0009] Further, the driving assembly comprises a power element, a driving rod, a rocker and a rotating shaft, the rotating shaft is rotatably arranged on the exhaust turbocharger, one end of the rotating shaft arranged in the exhaust turbocharger is rotatably connected with the shifting rod of the exhaust bypass valve, the other end of the rotating shaft arranged outside the exhaust turbocharger is fixedly arranged with the rocker, one end of the driving rod is connected with the power element, and the other end of the driving rod is rotatably connected with the rocker.

[0010] Further, the intake manifold comprises an intake pipe, an exhaust pipe, a throttle valve and a distribution chamber, the intake end of the intake pipe is communicated with the exhaust end of the intercooler, the intake end of the throttle valve is communicated with the exhaust end of the intake pipe, the exhaust end of the throttle valve is communicated with the intake end of the distribution chamber, the exhaust pipe is corresponding to the cylinder body of the engine body, the intake end of each exhaust pipe is communicated with the distribution chamber, and the exhaust end of each exhaust pipe is communicated with the intake end of the corresponding cylinder body.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] The engine body of the engine is connected with the exhaust turbocharger in the turbocharged intake and exhaust structure of the engine, the air entering the engine body is compressed through the exhaust turbocharger, so that the power of the engine body is improved, the knock sensor can detect the vibration condition of the engine body in real time, the controller controls the air intake of the exhaust turbocharger according to the vibration condition of the engine body, and then the compression ratio in the engine body is controlled, so that the closed loop control is realized, the compression ratio of the engine body is ensured to be high, the output power of the engine body is large, and the problem of knock is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is the front view of the turbocharged intake and exhaust structure of the engine;

[0014] Figure 2 is the three-dimensional schematic view of the intake manifold;

[0015] Figure 3 is the three-dimensional schematic view of the exhaust turbocharger;

[0016] Figure 4 is the three-dimensional schematic view of the exhaust turbocharger from another perspective.

[0017] In the figure: 1, engine main body; 2, exhaust turbocharger; 3, intake manifold; 4, distribution chamber; 5, exhaust pipe; 6, air inlet pipe; 7, first sensor; 8, electronic throttle valve; 9, liquid outlet pipe; 10, liquid inlet pipe; 11, threaded rod; 12, sleeve; 13, rocker; 14, PWM controller; 15, power element; 16, rotating shaft; 17, exhaust bypass valve; 18, lever; 19, second sensor. DETAILED DESCRIPTION

[0018] The utility model will be further explained below in combination with specific embodiments, however, people skilled in the art should understand that the detailed description given here in combination with the drawings is to explain better, the structure of the utility model must exceed these limited embodiments, and for some equivalent alternative or common means, this paper will not make detailed description, but still belongs to the protection scope of the application.

[0019] Figures 1-4 It is the best embodiment of the utility model, the following will be further explained in combination with the drawings Figures 1-4 The utility model will be further explained below in combination with specific embodiments, however, people skilled in the art should understand that the detailed description given here in combination with the drawings is to explain better, the structure of the utility model must exceed these limited embodiments, and for some equivalent alternative or common means, this paper will not make detailed description, but still belongs to the protection scope of the application.

[0020] Refer to the drawings Figures 1-4 A turbocharged intake and exhaust structure of engine, including intake manifold 3, exhaust turbocharger 2, knock sensor, controller and air inlet solenoid valve set on engine main body 1, intake manifold 3 and exhaust turbocharger 2 are set on the opposite sides of engine main body 1 respectively, the air outlet end of intake manifold 3 is communicated with the air inlet end of engine main body 1, the exhaust inlet of exhaust turbocharger 2 is communicated with the exhaust end of engine main body 1, the air inlet of exhaust turbocharger 2 is communicated with the air inlet end of intake manifold 3 after connecting intercooler, knock sensor is installed on engine main body 1, air inlet solenoid valve is set on the air inlet of exhaust turbocharger 2, the signal output end of knock sensor is connected with the signal input end of controller, the signal output end of controller is connected with air inlet solenoid valve, the turbocharged intake and exhaust structure of the engine of the utility model, engine main body 1 is connected with exhaust turbocharger 2, the air entering engine main body 1 is compressed by exhaust turbocharger 2 to improve the power of engine main body 1, knock sensor can detect the vibration condition of engine main body 1 in real time, controller controls the air intake of exhaust turbocharger 2 according to the vibration condition of engine main body 1, and then controls the compression ratio in engine main body 1, realizes closed-loop control, can guarantee the compression ratio of engine main body 1 is high, makes the output power of engine main body 1 big, and can avoid the problem of knock.

[0021] Specifically, in the embodiment, the exhaust turbocharger 2 and the intake manifold 3 are arranged on opposite sides of the engine body 1, so that the exhaust turbocharger 2 and the intake manifold 3 can avoid interfering with each other, and the exhaust turbocharger 2 can also avoid affecting the temperature of the compressed air entering the intake manifold 3.

[0022] In the embodiment, the engine body 1 is provided with three cylinder bodies, the intake ends of the cylinder bodies are communicated with the intake manifold 3, and the exhaust ends of the cylinder bodies are communicated with the exhaust turbocharger 2.

[0023] The intake manifold 3 comprises an intake pipe 6, an exhaust pipe 5, a throttle valve, and a damping assembly. The intake end of the throttle valve is communicated with the intake pipe 6, and the exhaust end of the throttle valve is communicated with the exhaust pipe 5. A fixing frame for fixedly connecting with the engine body 1 is arranged on the upper side of the exhaust pipe 5, and the fixing frame is detachably connected with the engine body 1 by bolts. The damping assembly is symmetrically arranged on both sides of the bottom of the exhaust pipe 5, and a heating assembly is arranged around the throttle valve. The damping assembly comprises a damping pad made of rubber, which is in a cylindrical shape and is clamped with a mounting plate arranged on the bottom of the exhaust pipe 5.

[0024] The intake manifold 3 further comprises a distribution chamber 4. The exhaust pipes 5 are arranged side by side and are spaced apart. Each exhaust pipe 5 is fixedly connected, and the intake end of each exhaust pipe 5 is fixedly connected with the lower part of the distribution chamber 4. The intake pipe 6 is arranged on the upper side of the exhaust pipe 5, and the intake pipe 6 and the exhaust pipe 5 are located on the same side of the distribution chamber 4. In the embodiment, the throttle valve is an electronic throttle valve 8. The intake end of the electronic throttle valve 8 is fixedly connected with the intake pipe 6, and the exhaust end of the electronic throttle valve 8 is fixedly connected with the upper part of the distribution chamber 4. The intake end of the intake pipe 6 is communicated with the exhaust end of the cooler. In the embodiment, three exhaust pipes 5 are arranged side by side.

[0025] A first sensor 7 is arranged on the intake pipe 6, and a second sensor 19 is arranged on the upper part of the distribution chamber 4. The first sensor 7 is a temperature sensor, which is mainly used for detecting the intake temperature. The second sensor 19 is a temperature and pressure sensor, which is used for real-time detection of the temperature and pressure of the intake. The first sensor 7 and the second sensor 19 are connected with the signal input end of the controller.

[0026] In the embodiment, the first sensor 7 and the second sensor 19 are both temperature and pressure sensors. The first sensor 7 only uses the temperature detection function of the temperature and pressure sensor.

[0027] The heating assembly comprises a jacket arranged around the electronic throttle valve 8. The electronic throttle valve 8 is provided with an inlet pipe 10 and an outlet pipe 9 communicated with the jacket. The inlet pipe 10 and the outlet pipe 9 are connected with the cooling liquid circulation pipeline of the snowmobile, so that the electronic throttle valve 8 is heated by the heat absorbed by the cooling liquid, to avoid icing of the electronic throttle valve 8.

[0028] In the embodiment, there is only one knock sensor, which is arranged in the middle of the middle cylinder block of the engine body 1. In the embodiment, the knock sensor is a vibration sensor.

[0029] In the embodiment, the controller is a PWM controller 14, the signal input end of which is connected with the signal output end of the knock sensor, and the signal output end of which is connected with the intake electromagnetic valve. When the knock sensor detects that the engine body 1 knocks, the PWM controller 14 controls the action of the intake electromagnetic valve and adjusts the opening degree of the intake electromagnetic valve, so as to adjust the intake air amount and control the compression ratio of the engine body 1, thereby realizing closed-loop control, which can ensure the output power of the engine body 1 and avoid knocking. When the second sensor 19 detects that the pressure in the distribution chamber 4 is too low, the PWM controller 14 also controls the action of the intake electromagnetic valve and adjusts the opening degree of the intake electromagnetic valve.

[0030] The turbocharged intake and exhaust structure of the engine further comprises a waste gas bypass valve 17 arranged at the waste gas inlet of the waste gas turbocharger 2 and a driving assembly connected with the waste gas bypass valve 17 and driving the waste gas bypass valve 17 to act. The PWM controller 14 is connected with the driving assembly. When the knock sensor detects that the engine knocks, the PWM controller 14 controls the driving assembly to act, and the driving assembly controls the waste gas bypass valve 17 to act, so as to reduce the waste gas driven by the waste gas turbocharger 2 to rotate the waste gas turbine and increase the waste gas directly discharged, further control the compression ratio of the engine, and thereby avoid the engine body 1 from knocking.

[0031] The driving assembly comprises a driving rod, a rocker 13, a rotating shaft 16 and a power element 15. In the embodiment, the power element 15 is an electric push rod, which is located at the compressor side of the waste gas turbocharger 2. The rotating shaft 16 is rotatably arranged in the waste gas turbocharger 2, one end of which is rotatably connected with a lever 18 of the waste gas bypass valve 17 in the waste gas turbocharger 2. The other end of the rotating shaft 16 is fixedly arranged with the rocker 13 arranged in the radial direction. One end of the driving rod is connected with the power element 15, and the other end is rotatably connected with the rocker 13. The power element 15 drives the driving rod to reciprocate, and then drives the rotating shaft 16 to rotate through the rocker 13, and the rotating shaft 16 drives the waste gas bypass valve 17 to act through the lever 18.

[0032] The driving rod comprises a sleeve 12 and a threaded rod 11, one end of the sleeve 12 is rotatably connected with the rocker 13, one end of the threaded rod 11 is connected with the power element 15, the other end of the threaded rod 11 extends into the other end of the sleeve 12 and is threadedly connected with the sleeve 12, a locking nut is threadedly connected on the threaded rod 11 and is pressed on the sleeve 12, so that the sleeve 12 and the threaded rod 11 are locked. Through the cooperation of the sleeve 12 and the threaded rod 11, the length of the driving rod is conveniently adjusted, and then the adjustment range of the exhaust gas bypass valve 17 is conveniently adjusted.

[0033] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms. Any skilled person in the art can modify or change the above disclosed technical content to obtain equivalent embodiments. However, any simple modification, equivalent change and modification of the above embodiments made according to the technical essence of the present application without departing from the technical scheme of the present application still falls within the protection scope of the present application.

Claims

1. A turbocharged intake and exhaust structure for an engine, characterized by: The application relates to an engine system, which comprises an air intake manifold (3), an exhaust turbocharger (2), a knock sensor, a controller and an air intake electromagnetic valve, the air intake manifold (3) and the exhaust turbocharger (2) are arranged on opposite sides of an engine body (1), the air outlet end of the air intake manifold (3) is communicated with the air inlet end of the engine body (1), the exhaust gas inlet of the exhaust turbocharger (2) is communicated with the exhaust end of the engine body (1), the air inlet of the exhaust turbocharger (2) is communicated with the air inlet end of the air intake manifold (3) after being connected with an intercooler, the knock sensor is arranged on the engine body (1), the air intake electromagnetic valve is arranged on the air inlet of the exhaust turbocharger (2), the signal output end of the knock sensor is connected with the signal input end of the controller, and the signal output end of the controller is connected with the air intake electromagnetic valve.

2. The turbocharged intake and exhaust structure for an engine according to claim 1, characterized by: First and second sensors (7) and (19) are arranged on the air inlet and air outlet of the throttle valve of the air intake manifold (3), and the signal output ends of the first and second sensors (7) and (19) are connected with the signal input end of the controller.

3. The turbocharged intake and exhaust structure for an engine according to claim 1, characterized by: The exhaust bypass valve (17) arranged on the exhaust gas inlet of the exhaust turbocharger (2) and a driving assembly are further arranged, the driving assembly is connected with the exhaust bypass valve (17), and the signal output end of the controller is connected with the driving assembly.

4. A turbocharged intake and exhaust arrangement for an engine according to claim 3 wherein: The driving assembly comprises a power element (15), a driving rod, a rocker (13) and a rotating shaft (16), the rotating shaft (16) is rotatably arranged on the exhaust turbocharger (2), one end of the rotating shaft (16) located in the exhaust turbocharger (2) is rotatably connected with a lever (18) of the exhaust bypass valve (17), the other end of the rotating shaft (16) located outside the exhaust turbocharger (2) is fixedly arranged with the rocker (13), one end of the driving rod is connected with the power element (15), and the other end of the driving rod is rotatably connected with the rocker (13).

5. A turbocharged induction and exhaust structure for an engine as defined in claim 4 wherein: The air intake manifold (3) comprises an air inlet pipe (6), an exhaust pipe (5), a throttle valve and a distribution chamber (4), the air inlet end of the air inlet pipe (6) is communicated with the air outlet end of the intercooler, the air inlet end of the throttle valve is communicated with the air outlet end of the air inlet pipe (6), the air outlet end of the throttle valve is communicated with the air inlet end of the distribution chamber (4), the exhaust pipe (5) is corresponding to the cylinder body of the engine body (1), the air inlet end of each exhaust pipe (5) is communicated with the distribution chamber (4), and the air outlet end of each exhaust pipe (5) is communicated with the air inlet end of the corresponding cylinder body.

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