Intake manifold structure and V-shaped double-cylinder internal combustion engine

Abstract

The utility model discloses an intake manifold structure and a V-shaped double-cylinder internal combustion engine, which comprise an intake manifold, an air throttle body is hermetically mounted at the intake end of the intake manifold, the air outlet end of the intake manifold is hermetically mounted on a cylinder head, and a sensor for detecting the temperature and pressure of an inner cavity of the intake manifold is mounted at one end, close to the air throttle body, of the intake manifold. An oil sprayer is installed at the end, close to the cylinder head, of the intake manifold. The air intake manifold has the advantages that the two air intake manifold structures in central symmetry are arranged, arrangement of the two air intake manifolds is completed in a limited space, the air intake manifolds can be universally used in a front cylinder and a rear cylinder, production cost is saved, independent air intake of the front cylinder and the rear cylinder is achieved through the two air intake manifolds, and the air intake manifold structure is simple in structure and convenient to operate. The phenomenon that the front cylinder and the rear cylinder scramble gas mutually when the internal combustion engine operates is effectively avoided, the combustion process of the internal combustion engine is improved, and therefore the dynamic property and economical efficiency of the internal combustion engine are improved, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to a double-cylinder internal combustion engine, in particular to an intake manifold structure and a V-type double-cylinder internal combustion engine. Background Art

[0002] At present, the intake manifold used in a V-type double-cylinder internal combustion engine is in a single-chamber state. The airway structure of the intake manifold is one of the important factors affecting the intake uniformity of the internal combustion engine, thus affecting the stability of the power output of the internal combustion engine; due to the limitation of the design space, the pressure stabilizing chamber of the intake manifold in the single-chamber state is relatively small, and the phenomenon of air robbing between the front and rear cylinders will occur during the working process of the internal combustion engine, which leads to fluctuations in the torque output of the internal combustion engine and increased vibration of the internal combustion engine; in the high-speed state of the internal combustion engine, this phenomenon will affect the charge coefficient of the internal combustion engine and reduce the maximum power of the internal combustion engine; furthermore, it affects the power performance and economy of the internal combustion engine. Content of the Utility Model

[0003] The purpose of the utility model is to provide an intake manifold structure and a V-type double-cylinder internal combustion engine aiming at the deficiencies of the intake manifold structure technology in the single-chamber state, adopting the method of separate intake for the two cylinders of the internal combustion engine to effectively ensure the intake uniformity of the internal combustion engine, thereby improving the stability of power output and enhancing the power performance, economy and service life of the engine.

[0004] The purpose of the utility model is realized by the following technical solutions: an intake manifold structure, including an intake manifold, a throttle valve body is hermetically installed at the intake end of the intake manifold, the outlet end of the intake manifold is hermetically installed on the cylinder head, a sensor for detecting the temperature and pressure inside the intake manifold is installed at one end of the intake manifold close to the throttle valve body, and an injector is installed at one end of the intake manifold close to the cylinder head.

[0005] Optionally, a heat insulation plate is installed between the intake manifold and the throttle valve body, and O-ring seals are installed on both end faces of the heat insulation plate.

[0006] Optionally, a heat insulation pad is installed between the intake manifold and the cylinder head.

[0007] Optionally, asbestos pads are adhered to both end faces of the heat insulation pad.

[0008] Optionally, a fixing seat is arranged on the intake manifold, and one end of the injector is installed on the fixing seat.

[0009] A V-type double-cylinder internal combustion engine, including the above intake manifold structure, there are two intake manifold structures, and the two intake manifold structures are centrosymmetric. The cylinder head of one intake manifold structure is the front cylinder head, and the cylinder head of the other intake manifold structure is the rear cylinder head.

[0010] The utility model has the following advantages: The V-type twin-cylinder internal combustion engine of the utility model is provided with two intake manifold structures that are centrosymmetric. Within a limited space, the layout of the two intake manifolds is completed, and the intake manifolds can be commonly used for the front and rear cylinders, thereby saving production costs. The two intake manifolds enable separate intake for the front and rear cylinders, effectively avoiding the phenomenon of air robbing between the front and rear cylinders during the operation of the internal combustion engine, improving the combustion process of the internal combustion engine, and thus enhancing the power performance, economy, and service life of the internal combustion engine. Brief Description of the Drawings

[0011] Figure 1 is a schematic structural diagram of a V-type twin-cylinder internal combustion engine

[0012] Figure 2 is a schematic cross-sectional view of the connection between the intake manifold and the front cylinder head

[0013] Figure 3 is a schematic cross-sectional view of the connection between the intake manifold and the rear cylinder head

[0014] In the figures, 1 - throttle valve body, 2 - first O-ring seal, 3 - second O-ring seal, 4 - heat insulation plate, 5 - sensor, 6 - intake manifold, 7 - fuel injector, 8 - fixing seat, 9 - heat insulation pad, 10 - front cylinder head, 11 - rear cylinder head, 20 - intake manifold structure. Detailed Embodiments

[0015] To make the purpose, technical solutions, and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the utility model. Usually, the components of the embodiments of the utility model described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents the selected embodiments of the utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the utility model without creative efforts fall within the scope of protection of the utility model.

[0017] It should be noted that, without conflict, the embodiments in the utility model and the features in the embodiments can be combined with each other.

[0018] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0019] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0021] As Figure 1 shown, a V-type twin-cylinder internal combustion engine includes an intake manifold structure 20. There are two intake manifold structures 20, and the two intake manifold structures 20 are centrosymmetric. The cylinder head of one intake manifold structure 20 is the front cylinder head 10, and the cylinder head of the other intake manifold structure 20 is the rear cylinder head 11. Therefore, this V-type twin-cylinder internal combustion engine has two intake manifolds 6, effectively eliminating the phenomenon of air scavenging between the front and rear cylinders, improving the combustion process of the internal combustion engine, thereby enhancing the power performance, economy and service life of the internal combustion engine. Moreover, the two intake manifolds 6 are designed to be centrosymmetric, and thus can make full use of the space, enabling the design of the two intake manifolds 6 to be completed within a limited space for the internal combustion engine. At the same time, the centrosymmetric intake manifold structure 20 is applicable to both the front and rear cylinders, thereby reducing the production cost.

[0022] In this embodiment, as Figure 2 and Figure 3As shown, the intake manifold 6 includes the intake manifold 6. A throttle valve body 1 is sealingly installed at the intake end of the intake manifold 6. Further, a heat insulation plate 4 is installed between the intake manifold 6 and the throttle valve body 1. O-ring seals are installed on both end faces of the heat insulation plate 4. The first O-ring seal 2 is on the side of the heat insulation plate 4 close to the throttle valve body 1, and the second O-ring seal 3 is on the side of the heat insulation plate 4 close to the intake manifold 6. The throttle valve body 1 and the intake manifold 6 are locked by locking screws. After the locking screws are locked, the O-ring seals are tightly pressed, thereby realizing the sealing between the intake manifold 6 and the throttle valve body 1.

[0023] In this embodiment, as Figure 2 and Figure 3 shown, the outlet end of the intake manifold 6 is sealingly installed on the cylinder head. Preferably, a heat insulation pad 9 is installed between the intake manifold 6 and the cylinder head. Further, asbestos pads are adhered to both end faces of the heat insulation pad 9. That is to say, asbestos pads are adhered to the two end faces of the heat insulation pad 9 with glue for sealing. Both the heat insulation pad 9 and the heat insulation plate 4 are commercially available products, so their specific functions and structures will not be elaborated here.

[0024] In this embodiment, as Figure 2 and Figure 3 shown, a sensor 5 for detecting the temperature and pressure inside the intake manifold 6 is installed at one end of the intake manifold 6 close to the throttle valve body 1. Preferably, the sensor 5 is an integrated temperature and pressure sensor, which is a commercially available product, and its specific function and structure will not be elaborated here.

[0025] In this embodiment, as Figure 2 and Figure 3 shown, an injector 7 is installed at one end of the intake manifold 6 close to the cylinder head. A fixing seat 8 is provided on the intake manifold 6, and one end of the injector 7 is installed on the fixing seat 8. Installing the injector 7 on the intake manifold 6 through the fixing seat 8 belongs to the prior art, so the specific installation structure of the injector 7 will not be elaborated here.

[0026] The working process of the present utility model is as follows: When the internal combustion engine is working, the two intake manifolds 6 supply air to the cylinder head respectively, realizing independent intake for the front and rear cylinders, effectively avoiding the phenomenon of air snatching between the front and rear cylinders during the operation of the internal combustion engine, and effectively improving the reliability and service life of the hot engine parts of the internal combustion engine.

[0027] Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An intake manifold structure, characterized in that: It includes an intake manifold, the intake end of the intake manifold is sealed with a throttle body, the outlet end of the intake manifold is sealed with a cylinder head, a sensor for detecting the temperature and pressure of the inner cavity of the intake manifold is installed on one end of the intake manifold close to the throttle body, and a fuel injector is installed on one end of the intake manifold close to the cylinder head.

2. An intake manifold structure according to claim 1, characterized in that: A heat insulation plate is installed between the intake manifold and the throttle body, and O-type sealing rings are installed on both end surfaces of the heat insulation plate.

3. The intake manifold structure according to claim 1, characterized in that: A heat insulation pad is installed between the intake manifold and the cylinder head.

4. An intake manifold structure according to claim 3, characterized in that: Asbestos pads are adhered to both end surfaces of the thermal insulation pad.

5. The intake manifold structure according to claim 1, characterized in that: A fixing seat is arranged on the intake manifold, and one end of the fuel injector is mounted on the fixing seat.

6. A V-type twin-cylinder internal combustion engine, characterized in that: It comprises the intake manifold structure as described in any one of claims 1 to 5, wherein there are two intake manifold structures, and the two intake manifold structures are centrally symmetrical, wherein the cylinder head of one intake manifold structure is a front cylinder head, and the cylinder head of the other intake manifold structure is a rear cylinder head.

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