Structure for solving problem of redistribution of airflow trend in case of freezing of throttle valve of intake manifold

Abstract

The utility model discloses a structure for solving icing of a throttle valve of an intake manifold and redistributing airflow trend, which belongs to the field of engine gas distribution, and comprises a main body pipe and a high-temperature gas inlet, the middle position of the outer surface of the main body pipe is provided with an air passage end connected with a forced ventilation system of a crankcase, and the main body pipe is arranged on the intake manifold of the engine; the high-temperature gas inlet used for directly guiding high-temperature gas into the engine intake manifold is formed in the main body part; according to the technical key points, an existing mode that crankcase waste gas and fresh air are evenly mixed and then penetrate through a throttle valve to enter an air inlet manifold is changed, an independent structure is designed, high-temperature waste gas in a crankcase can directly enter the air inlet manifold, the situation that the high-temperature gas and a low-temperature throttle valve meet is eradicated, and therefore moisture generated due to high-low temperature difference is eradicated; therefore, the situation that moisture disturbs operation of the throttle valve is avoided, the overall using effect is good, implementation is convenient, cost is low, and good using prospects are achieved.

Description

Technical Field

[0001] The utility model belongs to the field of engine gas distribution, and specifically relates to a structure for redistributing the air flow direction to solve the problem of icing of the throttle valve in the intake manifold. Background Technique

[0002] An automobile engine is a device that provides power for an automobile. It is the heart of the automobile and determines the power performance, economy, stability and environmental friendliness of the automobile.

[0003] The performance of an automobile engine directly affects the power, fuel efficiency and emissions of the vehicle. However, in cold climates, the icing of the engine throttle valve may cause the vehicle to lose power, reduce fuel efficiency or even fail to start, seriously affecting driving safety and vehicle reliability.

[0004] Therefore, studying the influencing factors of engine throttle valve icing has important theoretical and practical significance.

[0005] At present, in order to improve fuel economy and reduce emission pollution of gasoline engines, the crankcase forced ventilation system is used to extract gases from the crankcase and introduce them into the engine intake pipeline, and then inhaled into the cylinder for re-combustion. The crankcase forced ventilation system of a supercharged gasoline engine is basically arranged with two breathing channels, namely a light load breathing channel and a full load breathing channel.

[0006] The full load breathing channel is connected to the front end of the compressor. The light load breathing channel is directly connected to the intake manifold or the intake port. The crankcase exhaust gas and fresh air are evenly mixed and then enter each cylinder. However, for an engine with the throttle valve arranged downward, a lot of water vapor is carried by the crankcase exhaust gas coming from the light load breathing channel. When the vehicle runs in an extremely cold environment, it causes icing and jamming at the throttle valve plate, triggering the engine to enter a limp home mode due to a fault.

[0007] Due to the overall layout of the engine, the throttle valve is in a downward direction. The temperature difference between the high-temperature gas introduced at the crankcase forced ventilation system end and the low-temperature throttle valve causes moisture to be generated, and it cannot directly enter the pressure stabilizing chamber due to gravity and then enter the engine for secondary combustion. After long-term operation, more and more moisture accumulates, resulting in icing at the throttle valve, causing the throttle flap to fail to open normally and triggering the engine to enter a limp home mode due to a fault.

[0008] Regarding the problem of throttle valve icing and jamming caused by the engine throttle valve, it is necessary to record the throttle valve icing process through professional methods and analyze and confirm the source of moisture. There are many ways to solve the icing at the throttle valve, such as designing a special water baffle in the manifold to guide the flow direction of moisture, adding a heating device at the throttle valve body, etc. However, the above-mentioned solutions are all relatively costly and troublesome to implement;

[0009] In summary, the existing methods for solving the icing problem at the throttle valve have certain drawbacks during use and do not meet the requirements of people. Therefore, we propose a structure for redistributing the airflow direction to solve the icing problem of the intake manifold throttle valve. Summary of the Invention

[0010] In order to overcome the deficiencies of the prior art, the embodiments of the present application provide a structure for redistributing the airflow direction to solve the icing problem of the intake manifold throttle valve. It changes the existing way that the crankcase exhaust gas and fresh air are evenly mixed and then pass through the throttle valve into the intake manifold. By designing a separate structure, the high-temperature exhaust gas in the crankcase can directly enter the intake manifold, preventing the high-temperature gas from meeting the low-temperature throttle valve, thus eliminating the generation of moisture due to the high and low temperature difference, and avoiding the situation where moisture interferes with the operation of the throttle valve. The overall use effect is good, the implementation is convenient, the cost is low, and it has a good application prospect.

[0011] The technical solution adopted by the embodiments of the present application to solve its technical problems is as follows:

[0012] A structure for redistributing the airflow direction to solve the icing problem of the intake manifold throttle valve, including a main pipe and a high-temperature gas inlet:

[0013] An airway end connected to the crankcase forced ventilation system is provided at the middle position of the outer surface of the main pipe, and the main pipe is arranged on the engine intake manifold;

[0014] A high-temperature gas inlet for directly introducing high-temperature gas into the engine intake manifold is arranged on the main pipe.

[0015] The present utility model describes a structure for redistributing the airflow direction to solve the icing problem of the intake manifold throttle valve. It changes the existing way that the crankcase exhaust gas and fresh air are evenly mixed and then pass through the throttle valve into the intake manifold. By designing a separate structure, the high-temperature exhaust gas in the crankcase can directly enter the intake manifold, preventing the high-temperature gas from meeting the low-temperature throttle valve, thus eliminating the generation of moisture due to the high and low temperature difference, and avoiding the situation where moisture interferes with the operation of the throttle valve. The overall use effect is good, the implementation is convenient, the cost is low, and it has a good application prospect.

[0016] Preferably, the number of the high-temperature gas inlets is the same as the number of the engine intake manifolds, and the high-temperature gas inlets are communicated with the engine intake manifolds.

[0017] The utility model discloses a structure for solving the icing of the throttle valve in the intake manifold and redistributing the air flow direction. The main pipe is provided with high-temperature gas inlets equal in number to the engine intake manifolds, ensuring the uniformity of the air passages. A secondary distribution device for high- and low-temperature gases is adopted to reduce the accumulation of water vapor, redirect the water into the engine for secondary combustion, improve the combustion efficiency of the engine. After long-distance road tests on the whole vehicle, there is no longer any throttle valve icing phenomenon, and the use effect is good, with a good application prospect.

[0018] Preferably, an annular groove is arranged on the outer surface of the high-temperature gas inlet, and a sealing ring is installed on the annular groove.

[0019] Preferably, end caps are fixedly installed on both end faces of the main pipe.

[0020] Preferably, a plurality of groups of connecting seats are installed on the outer surface of the main pipe, and the connecting seats are fixedly connected to the engine intake manifolds.

[0021] In summary, the utility model includes at least one of the following beneficial technical effects:

[0022] First, the utility model discloses a structure for solving the icing of the throttle valve in the intake manifold and redistributing the air flow direction. It changes the existing way that the crankcase exhaust gas and fresh air are evenly mixed and then pass through the throttle valve into the intake manifold. By designing a separate structure, the high-temperature exhaust gas in the crankcase can directly enter the intake manifold, preventing the high-temperature gas from meeting the low-temperature throttle valve, thus preventing the generation of water due to the high and low temperature difference, and avoiding the situation where water interferes with the operation of the throttle valve. The overall use effect is good, the implementation is convenient, the cost is low, and it has a good application prospect.

[0023] Second, the utility model discloses a structure for solving the icing of the throttle valve in the intake manifold and redistributing the air flow direction. The main pipe is provided with high-temperature gas inlets equal in number to the engine intake manifolds, ensuring the uniformity of the air passages. A secondary distribution device for high- and low-temperature gases is adopted to reduce the accumulation of water vapor, redirect the water into the engine for secondary combustion, improve the combustion efficiency of the engine. After long-distance road tests on the whole vehicle, there is no longer any throttle valve icing phenomenon, and the use effect is good, with a good application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is the usage state diagram of the utility model;

[0025] Figure 2 is the partial structure diagram of the utility model;

[0026] Figure 3 is the partial side view sectional structure diagram of the utility model

[0027] Figure 4It is a side view structural diagram of the connection state in the present utility model;

[0028] Figure 5 It is an installation structural diagram of the present utility model;

[0029] Figure 6 It is a connection structural diagram of the high-temperature gas inlet in the present utility model.

[0030] Reference numerals: 1, main body pipe; 2, airway end; 3, high-temperature gas inlet; 4, sealing ring; 5, plug cover; 6, connecting seat. Specific implementation manner

[0031] The embodiment of the present application provides a structure for solving the problem of icing of the throttle valve in the intake manifold and redistributing the air flow direction, so as to solve the problems recorded in the background art.

[0032] Embodiment 1:

[0033] A structure for solving the problem of icing of the throttle valve in the intake manifold and redistributing the air flow direction, as Figures 1-6 shown, includes a main body pipe 1 and a high-temperature gas inlet 3:

[0034] An airway end 2 connected to the crankcase ventilation system is arranged at the middle position of the outer surface of the main body pipe 1, and the main body pipe 1 is arranged on the engine intake manifold;

[0035] A high-temperature gas inlet 3 for directly introducing high-temperature gas into the engine intake manifold is arranged on the main body pipe 1.

[0036] The present utility model describes a structure for solving the problem of icing of the throttle valve in the intake manifold and redistributing the air flow direction, which changes the existing way that the crankcase exhaust gas and fresh air are evenly mixed and then pass through the throttle valve into the intake manifold. A separate structure is designed so that the high-temperature exhaust gas in the crankcase can directly enter the intake manifold, preventing the high-temperature gas from meeting the low-temperature throttle valve, thus preventing moisture from being generated due to the high and low temperature difference, and avoiding the situation where moisture interferes with the operation of the throttle valve. The overall use effect is good, the implementation is convenient, the cost is low, and it has a good application prospect.

[0037] Working principle: During use, the high-temperature gas in the crankcase ventilation system (i.e., the small-load breathing passage recorded in the background art) enters the interior of the main body pipe 1 directly through the airway end 2, and then passes through the high-temperature gas inlet 3 into the engine intake manifold.

[0038] Embodiment 2:

[0039] On the basis of Embodiment 1, as Figures 1-6 shown, this embodiment is the structure of the limiting component.

[0040] The number of high-temperature gas inlets 3 is the same as that of the engine intake manifolds, and the high-temperature gas inlets 3 are communicated with the engine intake manifolds.

[0041] Meet the air passage uniformity requirement of ±3%.

[0042] The utility model discloses a structure for solving the problem of ice formation on the throttle valve of the intake manifold and redistributing the air flow direction. A high-temperature gas inlet 3 with the same number as the engine intake manifolds is installed on the main pipe 1, which ensures the air passage uniformity. By adopting a secondary distribution device for high- and low-temperature gases, the accumulation of water vapor is reduced, and the water is redirected to enter the engine for secondary combustion, improving the engine combustion efficiency. After long-distance road tests of the whole vehicle, there is no longer any ice formation on the throttle valve, and the use effect is good, with a good application prospect.

[0043] An annular groove is arranged on the outer surface of the high-temperature gas inlet 3, and a sealing ring 4 is installed on the annular groove. The material of the sealing ring 4 is fluororubber (FKM), and the wire diameter is 2.35 mm, meeting the requirements of normal filling rate and compression ratio.

[0044] Plug covers 5 are fixedly installed on both end faces of the main pipe 1.

[0045] Several groups of connecting seats 6 are installed on the outer surface of the main pipe 1. The connecting seats 6 are fixedly connected with the engine intake manifolds and are fixed by M6 internal hexagon socket head cap screws, saddle-shaped gaskets, bushings and copper nuts.

[0046] Working principle: During use, the high-temperature gas in the crankcase forced ventilation system (i.e., the small-load breathing passage described in the background technology) directly enters the interior of the main pipe 1 through the air passage end 2, and then passes through the high-temperature gas inlets 3 and is evenly distributed to several groups of engine intake manifolds, and is transmitted to the engine cylinders through several groups of engine intake manifolds.

[0047] Finally, it should be noted that: Obviously, the above embodiments are merely examples for clearly illustrating the present invention and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A structure for redistributing airflow direction to solve the problem of intake manifold throttle icing, characterized in that: include: A main body pipe (1) having an airway end (2) connected to a crankcase forced ventilation system provided at a middle position of its outer surface, the main body pipe (1) being arranged on an engine intake manifold; A high-temperature gas inlet (3) for directly introducing high-temperature gas into an engine intake manifold, the inlet being arranged on the main pipe (1); The number of the high-temperature gas inlets (3) is the same as the number of the engine intake manifolds, and the high-temperature gas inlets (3) are in communication with the engine intake manifolds; An annular groove is provided on the outer surface of the high-temperature gas inlet (3), and a sealing ring (4) is installed on the annular groove; Blocking covers (5) are fixedly mounted on both end surfaces of the main tube (1).

2. A structure for redistributing airflow direction to solve the problem of intake manifold throttle icing as claimed in claim 1, characterized in that: A plurality of groups of connection seats (6) are installed on the outer surface of the main body tube (1), and the connection seats (6) are fixedly connected to the engine intake manifold.

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