Engine air inlet pretreatment device and engine

Abstract

The invention provides an engine air inlet pretreatment device and an engine, and relates to the technical field of engine combustion optimizing.The device comprises a first air inlet channel, a first air outlet channel and a second air outlet channel which are of a Y-shaped structure, and the outer wall of the second air outlet channel is concaved inwards to form a containing part; the tail gas pipeline and the second gas outlet channel intersect and are partially contained in the containing part, so that mixed gas in the second gas outlet channel is heated by tail gas in the tail gas pipeline. A temperature control valve is arranged at the intersection of the outlet end of the first air inlet channel, the inlet end of the first air outlet channel and the inlet end of the second air outlet channel, and the first end of a rotating shaft of the temperature control valve is connected with the first steering engine. The thermocouple is used for measuring the temperature of mixed gas in the crankcase and sending the temperature to the controller, and the controller judges the size relation between the temperature of the mixed gas and a temperature threshold value and controls the first steering engine to drive the rotating shaft of the temperature control valve to rotate so as to adjust the flow proportion of the mixed gas flowing into the first gas outlet channel and the second gas outlet channel from the first gas inlet channel.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of engine combustion optimization, and in particular to an engine intake air pretreatment device and an engine. Background Art

[0002] During the operation of a piston engine, the fuel mixes with the air in the intake pipe to form a mixture, which then flows through the crankcase and then through the scavenging passage into the combustion chamber in the cylinder for combustion. Compared with gasoline, aviation kerosene has a higher viscosity and lower volatility. This results in the atomization effect and evaporation efficiency being significantly lower than that of a gasoline engine under the same environmental conditions when the engine uses aviation kerosene as fuel. Therefore, if the temperature of the mixture in the crankcase is low, the mixture will not be fully atomized, resulting in incomplete combustion and reduced engine power output; in addition, the incompletely burned mixture will not only form carbon deposits in the combustion chamber, damaging the engine, but will also be discharged from the engine in the form of carbon smoke, polluting the environment.

[0003] However, aviation kerosene also has the characteristics of low octane number and low autoignition point. If the mixture temperature in the crankcase is too high, the mixture may spontaneously ignite in the crankcase and easily detonate after entering the combustion chamber, which will reduce the engine performance. Therefore, how to improve the atomization performance of the mixture and reduce the probability of spontaneous combustion of the mixture in the crankcase or detonation in the combustion chamber is a problem that needs to be solved in the working process of aviation kerosene piston engines. Summary of the invention

[0004] In view of the above problems, an embodiment of the present application provides an engine intake pretreatment device and an engine, which overcomes the above problems or at least partially solves the problems of both improving the atomization performance of the mixture and reducing the probability of spontaneous combustion of the mixture in the crankcase or detonation in the combustion chamber.

[0005] According to a first aspect of an embodiment of the present application, an engine intake air pretreatment device is provided, the device comprising: a controller, a first servo, a thermocouple, an exhaust gas duct, a temperature control valve, a first intake channel, a first outlet channel, and a second outlet channel.

[0006] The first air intake channel, the first air outlet channel and the second air outlet channel are in a "Y"-shaped structure. The outer wall of the second air outlet channel is recessed inward to form a accommodating portion. The exhaust gas pipe is arranged to intersect with the second air outlet channel and is partially accommodated in the accommodating portion so that the mixed gas in the second air outlet channel is heated by the exhaust gas in the exhaust gas pipe.

[0007] A temperature control valve is provided at the intersection of the outlet end of the first air inlet channel, the inlet end of the first air outlet channel, and the inlet end of the second air outlet channel, the rotating shaft of the temperature control valve is supported by the channel wall surface at the intersection, and the first end and the second end of the rotating shaft of the temperature control valve both extend out of the channel wall surface. The first end of the rotating shaft of the temperature control valve is connected to the first steering gear, and the first steering gear is connected to the controller.

[0008] The controller is also connected to a thermocouple, which is used to measure the temperature of the mixture in the crankcase. The controller is used to receive the temperature of the mixture and determine the relationship between the temperature of the mixture and a temperature threshold, and control the first servo to drive the shaft of the temperature control valve to rotate according to the relationship, so as to adjust the flow ratio of the mixture in the first intake channel to the first outlet channel and the second outlet channel.

[0009] In this embodiment, by setting the first air intake channel, the first air outlet channel and the second air outlet channel of the "Y"-shaped structure, the mixed gas can flow to the first air outlet channel and the second air outlet channel respectively after entering from the first air intake channel, and the second air outlet channel is arranged to intersect with the exhaust pipe so that the mixed gas in the second air outlet channel can be heated by the exhaust gas in the exhaust pipe. In this way, the temperature of the mixed gas about to enter the crankcase can be increased, and the mixed gas can be fully atomized. In addition, the controller can receive the mixed gas temperature and judge the relationship between the mixed gas temperature and the temperature threshold, and control the first steering gear to drive the rotating shaft of the temperature control valve to rotate according to the judgment result to adjust the flow ratio of the mixed gas in the first air intake channel to the first air outlet channel and the second air outlet channel. In this way, if the temperature of the mixed gas in the crankcase is too high, the mixed gas in the first air intake channel can be mainly flowed to the first air outlet channel by adjusting the temperature control valve to prevent the mixed gas about to enter the crankcase from being heated and having a high temperature, thereby reducing the probability of the mixed gas spontaneously igniting in the crankcase or knocking in the combustion chamber. Improve the utilization efficiency of the mixed gas and reduce the emission of pollutants such as carbon smoke from the engine.

[0010] In an optional manner, the temperature threshold includes a first temperature threshold and a second temperature threshold, and the second temperature threshold is higher than the first temperature threshold. When the controller determines that the temperature of the mixed gas is lower than the first temperature threshold, the controller is used to control the first servo to drive the shaft of the temperature control valve to rotate, so as to increase the flow of the mixed gas in the first air inlet channel to the second air outlet channel. When the controller determines that the temperature of the mixed gas is higher than the second temperature threshold, the controller is used to control the first servo to drive the shaft of the temperature control valve to rotate, so as to increase the flow of the mixed gas in the first air inlet channel to the first air outlet channel. Otherwise, the flow ratio of the mixed gas in the original first air inlet channel to the first air outlet channel and the second air outlet channel is maintained.

[0011] In an optional manner, the device is also provided with a temperature control valve position sensor, which is connected to the second end of the rotating shaft of the temperature control valve. The temperature control valve position sensor is also connected to the controller. The temperature control valve position sensor is used to monitor the opening of the temperature control valve and send the opening of the temperature control valve to the controller.

[0012] By setting a temperature control valve position sensor, after the controller controls the first servo to drive the shaft of the temperature control valve to rotate so as to adjust the flow ratio of the mixed gas in the first intake channel to the first outlet channel and the second outlet channel, the temperature control valve position sensor can also be used to determine whether the flow ratio of the mixed gas in the first intake channel to the first outlet channel and the second outlet channel has actually been adjusted, thereby reducing the possibility of failing to realize the function of the engine intake pretreatment device provided in the embodiment of the present application due to damage to the controller, the first servo or the temperature control valve.

[0013] In an optional manner, the device further includes a throttle valve and a second steering gear. A throttle valve is provided at the inlet end of the first air inlet passage, a rotating shaft of the throttle valve is supported by the wall surface of the first air inlet passage, and a first end and a second end of the rotating shaft of the throttle valve both extend out of the wall surface of the first air inlet passage. The first end of the rotating shaft of the throttle valve is connected to the second steering gear, and the second steering gear is connected to the controller.

[0014] In this embodiment, the controller can control the second steering gear to drive the shaft of the throttle valve to rotate, so as to control the total amount of mixed gas entering according to different working conditions of the engine.

[0015] In an optional manner, the device is further provided with a throttle position sensor, which is connected to the second end of the rotating shaft of the throttle valve. The throttle position sensor is also connected to the controller, and the throttle position sensor is used to monitor the opening of the throttle valve and send the opening of the throttle valve to the controller.

[0016] In this way, the present embodiment can also monitor the opening of the throttle valve by means of the throttle position sensor to ensure that the opening of the throttle valve meets the working condition of the engine.

[0017] In an optional manner, the device further includes a first rocker arm, a first connecting rod, and a second rocker arm. The first end of the first rocker arm is connected to the first end of the rotating shaft of the temperature control valve, the second end of the first rocker arm is connected to the first end of the first connecting rod, the second end of the first connecting rod is connected to the first end of the second rocker arm, and the second end of the second rocker arm is connected to the first steering gear, so that the first end of the rotating shaft of the temperature control valve is connected to the first steering gear.

[0018] In this way, the first steering gear can move synchronously with the rotating shaft of the temperature control valve, so as to finally realize the control of the opening of the temperature control valve by the controller.

[0019] In an optional manner, the device further includes a third rocker arm, a second connecting rod and a fourth rocker arm. The first end of the third rocker arm is connected to the first end of the rotating shaft of the throttle valve, the second end of the third rocker arm is connected to the first end of the second connecting rod, the second end of the second connecting rod is connected to the first end of the fourth rocker arm, and the second end of the fourth rocker arm is connected to the second steering gear, so that the first end of the rotating shaft of the throttle valve is connected to the second steering gear.

[0020] In this way, the second steering gear can move synchronously with the rotating shaft of the throttle valve, so as to finally realize the control of the opening of the throttle valve by the controller.

[0021] The second aspect of the embodiment of the present application also provides an engine, including a crankcase, a first cylinder, a second cylinder, a first exhaust pipe, a second exhaust pipe and the engine intake pretreatment device provided by the first aspect of the embodiment of the present application, the outlet ends of the first outlet channel and the second outlet channel are both connected to the inlet end of the crankcase, the outlet end of the crankcase is respectively connected to the first cylinder and the second cylinder, the first cylinder is also connected to the first exhaust pipe, the second cylinder is also connected to the second exhaust pipe, and the first exhaust pipe is connected to the second exhaust pipe through an exhaust pipe.

[0022] The engine provided in this embodiment can improve the atomization performance of the mixed gas and reduce the probability of the mixed gas spontaneously igniting in the crankcase or knocking in the combustion chamber by setting the engine intake pretreatment device. In this way, the utilization efficiency of the mixed gas can be improved and the emission of pollutants such as carbon smoke from the engine can be reduced.

[0023] In an optional manner, a first through hole is provided on the wall of the crankcase, and a hot electrode of the thermocouple passes through the first through hole and is located in the crankcase to measure the temperature of the mixed gas in the crankcase.

[0024] The above description is only an overview of the technical solution of the embodiment of the present application. In order to more clearly understand the technical means of the embodiment of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 A schematic diagram of the structure of an engine intake air pretreatment device provided in some embodiments of the present application Figure 1 .

[0027] Figure 2 A schematic diagram of the structure of an engine intake air pretreatment device provided in some embodiments of the present application Figure 2 .

[0028] Figure 3 A schematic diagram of the opening of a temperature-controlled valve provided in some embodiments of the present application.

[0029] Figure 4 A schematic diagram of the opening degree of another temperature control valve provided in some embodiments of the present application.

[0030] Figure 5 A schematic diagram of the structure of an engine intake air pretreatment device provided in some embodiments of the present application Figure 3 .

[0031] Figure 6 A schematic diagram of the structure of an engine provided for some embodiments of the present application. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0034] The terms "comprising" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover but not exclude other contents. The word "a" or "an" does not exclude the presence of a plurality.

[0035] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiments" in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0036] In addition, the terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0037] In the description of the present application, unless otherwise specified, "plurality" means more than two (including two), and similarly, "multiple groups" means more than two groups (including two).

[0038] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, the "connection" or "connection" of a mechanical structure may refer to a physical connection. For example, the physical connection may be a fixed connection, such as a fixed connection through a fixing member, such as a fixed connection through a screw, bolt or other fixing member; the physical connection may also be a detachable connection, such as a mutual snap connection or snap connection; the physical connection may also be an integral connection, such as welding, bonding or integral molding to form a connection for connection. The "connection" or "connection" of a circuit structure may refer to an electrical connection or a signal connection in addition to a physical connection. For example, it may be a direct connection, that is, a physical connection, or it may be an indirect connection through at least one intermediate element, as long as the circuit is connected, or it may be the internal connection of two elements; the signal connection may refer to a signal connection through a media medium, such as a radio wave, in addition to a signal connection through a circuit. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] Figure 1 A schematic diagram of the structure of an engine intake air pretreatment device provided in some embodiments of the present application Figure 1 . Figure 2 A schematic diagram of the structure of an engine intake air pretreatment device provided in some embodiments of the present application Figure 2 . refer to Figure 1 and Figure 2 An engine intake air pretreatment device provided in an embodiment of the present application includes: a controller, a first servo 01, a thermocouple, an exhaust gas pipeline 02, a temperature control valve 03, a first intake channel 04, a first outlet channel 05 and a second outlet channel 06.

[0040] The first air intake channel 04, the first air outlet channel 05 and the second air outlet channel 06 are in a "Y" shape. The outer wall of the second air outlet channel 06 is recessed inward to form a receiving portion. The exhaust pipe 02 is intersected with the second air outlet channel 06 and partially received in the receiving portion so that the mixed gas in the second air outlet channel 06 is heated by the exhaust gas in the exhaust pipe 02.

[0041] A temperature control valve 03 is provided at the intersection of the outlet end of the first air inlet channel 04, the inlet end of the first air outlet channel 05 and the inlet end of the second air outlet channel 06. The rotating shaft 031 of the temperature control valve is supported by the channel wall at the intersection and the first end and the second end of the rotating shaft 031 of the temperature control valve both extend out of the channel wall. The first end of the rotating shaft 031 of the temperature control valve is connected to the first steering gear 01, and the first steering gear 01 is connected to the controller. Among them, the outlet end of the first air outlet channel 05 and the outlet end of the second air outlet channel 06 are both connected to the crankcase, and the controller can be set outside the engine.

[0042] The controller is also connected to a thermocouple, which can be set on the crankcase wall, and is used to measure the temperature of the mixed gas in the crankcase. The controller is used to receive the mixed gas temperature and determine the magnitude relationship between the mixed gas temperature and the temperature threshold, and control the first steering gear 01 to drive the rotating shaft 031 of the temperature control valve to rotate according to the magnitude relationship, so as to adjust the flow ratio of the mixed gas in the first intake channel 04 to the first outlet channel 05 and the second outlet channel 06.

[0043] In this embodiment, the first air inlet channel 04, the first air outlet channel 05 and the second air outlet channel 06 are set to a "Y"-shaped structure, so that the mixed gas can flow to the first air outlet channel 05 and the second air outlet channel 06 respectively after entering from the first air inlet channel 04, and the second air outlet channel 06 is arranged to intersect with the exhaust gas pipeline 02 so that the mixed gas in the second air outlet channel 06 can be heated by the exhaust gas in the exhaust gas pipeline 02. In this way, the temperature of the mixed gas that is about to enter the crankcase can be increased, and the mixed gas can be fully atomized. In addition, the controller can receive the mixed gas temperature and determine the relationship between the mixed gas temperature and the temperature threshold, and control the first steering gear 01 to drive the rotating shaft 031 of the temperature control valve to rotate according to the relationship, so as to adjust the flow ratio of the mixed gas in the first air inlet channel 04 to the first air outlet channel 05 and the second air outlet channel 06. In this way, if the temperature of the mixed gas in the crankcase is high, the mixed gas in the first intake passage 04 can be adjusted to flow mainly to the first outlet passage 05 to prevent the mixed gas about to enter the crankcase from being heated and overheated, thereby reducing the probability of the mixed gas self-igniting in the crankcase or knocking in the combustion chamber. The utilization efficiency of the mixed gas is improved, and the emission of pollutants such as soot from the engine is reduced.

[0044] In some embodiments, the temperature threshold includes a first temperature threshold and a second temperature threshold, the second temperature threshold being higher than the first temperature threshold. For example, the first temperature threshold may be 75 degrees Celsius (° C.), and the second temperature threshold may be 90° C. Figure 3 A schematic diagram of the opening of a temperature-controlled valve provided in some embodiments of the present application. Figure 4Another schematic diagram of the opening of a temperature control valve provided in some embodiments of the present application. When the controller determines that the temperature of the mixed gas is lower than the first temperature threshold, the controller is used to control the first steering gear 01 to drive the rotating shaft 031 of the temperature control valve to rotate, so as to increase the flow rate of the mixed gas in the first inlet channel 04 to the second outlet channel 06. Figure 3 , at this time, the mixed gas in the first air inlet channel 04 mainly flows to the second air outlet channel 06. When the controller determines that the mixed gas temperature is higher than the second temperature threshold, the controller is used to control the first steering gear 01 to drive the rotating shaft 031 of the temperature control valve to rotate, so as to increase the flow rate of the mixed gas in the first air inlet channel 04 to the first air outlet channel 05. Figure 4 , at this time, the mixed gas in the first air inlet channel 04 mainly flows to the first air outlet channel 05. Otherwise, the opening of the temperature control valve 03 can be controlled to remain unchanged to maintain the flow ratio of the mixed gas in the original first air inlet channel 04 to the first air outlet channel 05 and the second air outlet channel 06.

[0045] In some embodiments, the device may also be provided with a temperature control valve position sensor 07, which is connected to the second end of the rotating shaft 031 of the temperature control valve. The temperature control valve position sensor 07 is also connected to the controller. The temperature control valve position sensor 07 is used to monitor the opening of the temperature control valve 03 and send the opening of the temperature control valve 03 to the controller.

[0046] By setting a temperature control valve position sensor 07, after the controller controls the first servo 01 to drive the rotating shaft 031 of the temperature control valve to rotate so as to adjust the flow ratio of the mixed gas in the first air intake channel 04 to the first air outlet channel 05 and the second air outlet channel 06, the temperature control valve position sensor 07 can also be used to determine whether the flow ratio of the mixed gas in the first air intake channel 04 to the first air outlet channel 05 and the second air outlet channel 06 is actually adjusted, thereby reducing the possibility of failing to realize the function of the engine intake pretreatment device provided in the embodiment of the present application due to damage to the controller, the first servo 01 or the temperature control valve 03.

[0047] In some embodiments, the device may further include a throttle valve 08 and a second steering gear 09. The inlet end of the first air inlet channel 04 is provided with a throttle valve 08, the rotating shaft 081 of the throttle valve is supported by the wall surface of the first air inlet channel 04, and the first end and the second end of the rotating shaft 081 of the throttle valve both extend out of the wall surface of the first air inlet channel 04. The first end of the rotating shaft 081 of the throttle valve is connected to the second steering gear 09, and the second steering gear 09 is connected to the controller.

[0048] In this embodiment, the controller can control the second steering gear 09 to drive the rotating shaft 081 of the throttle valve to rotate, so as to control the total amount of the mixed gas entering according to different working conditions of the engine.

[0049] In some embodiments, the device may also be provided with a throttle position sensor 10, which is connected to the second end of the rotating shaft 081 of the throttle valve. The throttle position sensor 10 is also connected to the controller, and the throttle position sensor 10 is used to monitor the opening of the throttle valve 08 and send the opening of the throttle valve 08 to the controller.

[0050] In this way, the present embodiment can also monitor the opening of the throttle valve 08 by means of the throttle position sensor 10 to ensure that the opening of the throttle valve 08 meets the working condition of the engine.

[0051] Figure 5 A schematic diagram of the structure of an engine intake air pretreatment device provided in some embodiments of the present application Figure 3 . refer to Figure 5 In practical applications, the device may further include a first rocker arm 11, a first connecting rod 12, and a second rocker arm 13. The first end of the first rocker arm 11 is connected to the first end of the rotating shaft 031 of the temperature control valve, the second end of the first rocker arm 11 is connected to the first end of the first connecting rod 12, the second end of the first connecting rod 12 is connected to the first end of the second rocker arm 13, and the second end of the second rocker arm 13 is connected to the first steering gear 01, so that the first end of the rotating shaft 031 of the temperature control valve is connected to the first steering gear 01. In this way, the first steering gear 01 can act synchronously with the rotating shaft 031 of the temperature control valve, so as to finally realize the controller's control of the opening of the temperature control valve 03.

[0052] Similarly, reference Figure 5 The device may further include a third rocker arm 14, a second connecting rod 15 and a fourth rocker arm 16. The first end of the third rocker arm 14 is connected to the first end of the rotating shaft 081 of the throttle valve, the second end of the third rocker arm 14 is connected to the first end of the second connecting rod 15, the second end of the second connecting rod 15 is connected to the first end of the fourth rocker arm 16, and the second end of the fourth rocker arm 16 is connected to the second steering gear 09, so that the first end of the rotating shaft 081 of the throttle valve is connected to the second steering gear 09. In this way, the second steering gear 09 can act synchronously with the rotating shaft 081 of the throttle valve, so as to finally realize the controller's control of the opening of the throttle valve 08.

[0053] Another embodiment of the present application further provides an engine, Figure 6 A schematic diagram of the structure of an engine provided in some embodiments of the present application, referring to Figure 6The engine may include a crankcase 17, a first cylinder 18, a second cylinder 19, a first exhaust pipe 20, a second exhaust pipe 21 and the engine intake pretreatment device provided in the aforementioned embodiment of the present application. The outlet ends of the first outlet channel 05 and the second outlet channel 06 are both connected to the inlet end of the crankcase 17, and the outlet end of the crankcase 17 is respectively connected to the first cylinder 18 and the second cylinder 19. The first cylinder 18 is also connected to the first exhaust pipe 20, and the second cylinder 19 is also connected to the second exhaust pipe 21. The first exhaust pipe 20 is connected to the second exhaust pipe 21 through the exhaust pipe 02.

[0054] The engine provided in this embodiment can improve the atomization performance of the mixed gas and reduce the probability of the mixed gas spontaneously igniting in the crankcase 17 or knocking in the combustion chamber by setting the engine intake pretreatment device. In this way, the utilization efficiency of the mixed gas can be improved and the emission of pollutants such as carbon smoke from the engine can be reduced.

[0055] In practical applications, a first through hole may be provided on the wall of the crankcase 17 , and the thermocouple thermode 22 passes through the first through hole and is located in the crankcase 17 to measure the temperature of the mixed gas in the crankcase 17 .

[0056] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0057] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An engine intake air pretreatment device, characterized in that: The device comprises: a controller, a first steering gear, a thermocouple, an exhaust gas pipeline, a temperature control valve, a first air inlet channel, a first air outlet channel and a second air outlet channel; The first air inlet channel, the first air outlet channel and the second air outlet channel are in a "Y"-shaped structure, the outer wall of the second air outlet channel is recessed inward to form a receiving portion, the exhaust gas pipeline is arranged to intersect with the second air outlet channel and is partially received in the receiving portion, so that the mixed gas in the second air outlet channel is heated by the exhaust gas in the exhaust gas pipeline; The temperature control valve is provided at the intersection of the outlet end of the first air inlet channel, the inlet end of the first air outlet channel and the inlet end of the second air outlet channel, the rotating shaft of the temperature control valve is supported by the channel wall surface at the intersection and the first end and the second end of the rotating shaft of the temperature control valve both extend out of the channel wall surface; The first end of the rotating shaft of the temperature control valve is connected to the first steering gear, and the first steering gear is connected to the controller; The controller is also connected to the thermocouple, and the thermocouple is used to measure the mixture temperature in the crankcase. The controller is used to receive the mixture temperature and determine the relationship between the mixture temperature and a temperature threshold value, and control the first servo to drive the shaft of the temperature control valve to rotate according to the relationship, so as to adjust the flow ratio of the mixture in the first intake channel to the first outlet channel and the second outlet channel.

2. The device according to claim 1, characterized in that The temperature threshold includes a first temperature threshold and a second temperature threshold, the second temperature threshold is higher than the first temperature threshold, and when the controller determines that the temperature of the mixed gas is lower than the first temperature threshold, the controller is used to control the first steering gear to drive the shaft of the temperature control valve to rotate, so as to increase the flow of the mixed gas in the first air intake channel to the second air outlet channel; when the controller determines that the temperature of the mixed gas is higher than the second temperature threshold, the controller is used to control the first steering gear to drive the shaft of the temperature control valve to rotate, so as to increase the flow of the mixed gas in the first air intake channel to the first air outlet channel; otherwise, the flow ratio of the mixed gas in the original first air intake channel to the first air outlet channel and the second air outlet channel is maintained.

3. The device according to claim 1, characterized in that The device is also provided with a temperature control valve position sensor, which is connected to the second end of the rotating shaft of the temperature control valve. The temperature control valve position sensor is also connected to the controller. The temperature control valve position sensor is used to monitor the opening of the temperature control valve and send the opening of the temperature control valve to the controller.

4. The device according to claim 1, characterized in that The device also includes a throttle valve and a second steering gear. The throttle valve is provided at the inlet end of the first air intake channel, the rotating shaft of the throttle valve is supported by the wall of the first air intake channel, and the first end and the second end of the rotating shaft of the throttle valve both extend out of the wall of the first air intake channel, the first end of the rotating shaft of the throttle valve is connected to the second steering gear, and the second steering gear is connected to the controller.

5. The device according to claim 4, characterized in that The device is also provided with a throttle position sensor, which is connected to the second end of the rotating shaft of the throttle valve. The throttle position sensor is also connected to the controller. The throttle position sensor is used to monitor the opening of the throttle valve and send the opening of the throttle valve to the controller.

6. The device according to claim 1, characterized in that The device also includes a first rocker arm, a first connecting rod and a second rocker arm, wherein the first end of the first rocker arm is connected to the first end of the rotating shaft of the temperature control valve, the second end of the first rocker arm is connected to the first end of the first connecting rod, the second end of the first connecting rod is connected to the first end of the second rocker arm, and the second end of the second rocker arm is connected to the first servo gear, so that the first end of the rotating shaft of the temperature control valve is connected to the first servo gear.

7. The device according to claim 4, characterized in that The device also includes a third rocker arm, a second connecting rod and a fourth rocker arm, wherein the first end of the third rocker arm is connected to the first end of the rotating shaft of the throttle valve, the second end of the third rocker arm is connected to the first end of the second connecting rod, the second end of the second connecting rod is connected to the first end of the fourth rocker arm, and the second end of the fourth rocker arm is connected to the second servo gear, so that the first end of the rotating shaft of the throttle valve is connected to the second servo gear.

8. An engine, characterized in that: The invention comprises a crankcase, a first cylinder, a second cylinder, a first exhaust pipe, a second exhaust pipe and an engine intake pretreatment device according to any one of claims 1 to 7, wherein the outlet ends of the first air outlet channel and the second air outlet channel are both connected to the inlet end of the crankcase, the outlet end of the crankcase is respectively connected to the first cylinder and the second cylinder, the first cylinder is also connected to the first exhaust pipe, the second cylinder is also connected to the second exhaust pipe, and the first exhaust pipe is connected to the second exhaust pipe through the exhaust pipe.

9. The engine according to claim 8, characterized in that A first through hole is provided on the wall of the crankcase, and a hot electrode of the thermocouple passes through the first through hole and is located in the crankcase to measure the temperature of the mixed gas in the crankcase.

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