CN202250501U - car engine intake manifold - Google Patents

Abstract

The utility model discloses an automobile engine air intake manifold, the inlet manifold, pressure stabilizing cavity and inlet elbow communicate with each other in proper order, throttle valve mounting flange links to each other with the inlet manifold, cylinder cap mounting flange links to each other with the inlet elbow, be 123 ~ 128 contained angle between inlet manifold and the pressure stabilizing cavity, the hookup location department at inlet manifold and pressure stabilizing cavity is provided with the transition circular arc of R90 ~ R110mm, the interval of each inlet elbow in middle part position department is less than the interval at both ends, the length of each inlet elbow is 350 ~ 370mm, the internal diameter is 46 ~ 48mm, this inlet manifold's length size L is less than or equal to 1435mm, width size W is less than or equal to 1320mm, height size H is less than or equal to 200 mm. The utility model discloses guarantee that air intake manifold admits air smoothly, under the prerequisite of engine wholeness ability, provide a more compact, the lower automobile engine air intake manifold of cost of structure.

Description

car engine intake manifold

technical field

The utility model relates to an automobile component, in particular to an intake manifold used on an automobile engine.

Background technique

The intake manifold of the automobile engine is installed between the engine cylinder head and the throttle valve, and generally consists of an intake manifold, a pressure stabilizing chamber, an intake elbow, a throttle valve mounting flange and a cylinder head mounting flange. The airflow entering from the intake manifold passes through the plenum chamber and flows into different intake elbows. The number of intake elbows is equal to the number of cylinders, and different cylinders are fed separately. In the traditional structure, the included angle between the plenum chamber and the intake manifold is 130-135°. Due to the small angle, the airflow will produce a sharp bend in the process of flowing from the intake manifold through the plenum chamber to the intake elbow, so that the airflow Not smooth, thus affecting the charging efficiency of the cylinder, resulting in poor engine performance; in addition, the intake elbows are usually distributed in a comb shape, the lengths of each intake elbow are different, and the inner diameters are basically equal (all around 40mm), resulting in The intake air volume of each cylinder is uneven, and the engine vibration and noise are large.

The State Intellectual Property Office disclosed a kind of "automobile engine intake manifold" on May 12, 2010, and the publication number is 101705890A. The included angle of the intake manifold is increased to 145-155°, which effectively avoids sharp bends in the air flow process, makes the air flow smoother, improves the cylinder charging efficiency and engine performance; in addition, limits the angle of each intake elbow The shape is the same, the length is equal, and the length of each intake manifold is adjusted to 390-410mm, and the inner diameter is adjusted to 34-37mm to further improve the charging efficiency of the cylinder, improve the performance of the engine, and reduce the vibration and noise of the engine. However, in the process of use, it was found that although the overall performance of the intake manifold has been significantly improved, it is often limited by the installation space in the car because of its large size and insufficient overall structure, and the cost is still high .

Utility model content

The purpose of the utility model is to provide an automobile engine intake manifold with a more compact structure and lower cost under the premise of ensuring the smooth intake of the intake manifold and the overall performance of the engine.

In order to solve the above technical problems, the utility model provides an intake manifold of an automobile engine, which includes an intake manifold (1), a pressure stabilizing chamber (2), multiple intake elbows (3) arranged side by side, and a throttle valve The installation flange (4), the cylinder head installation flange (5), the intake manifold (1), the pressure stabilizing chamber (2) and the intake elbow (3) are connected in sequence, and the throttle valve installation flange ( 4) It is connected to the intake manifold (1), and the cylinder head mounting flange (5) is connected to the intake elbow (3). The angle between them is 123-128°. A transitional arc of R90-R110mm is set at the connection position between the intake manifold (1) and the plenum chamber (2), and each intake elbow (3) is at the middle position The distance between the two ends is smaller than the distance between the two ends. The length of each intake elbow (3) is 350-370mm, and the inner diameter is 46-48mm. The length dimension of the intake manifold is L≤1435mm, the width dimension W≤1320mm, and the height dimension H≤200mm.

The utility model controls the external dimensions of the intake manifold from four aspects, so that the overall structure is more compact and the cost is lower: (a) Change the angle between the intake manifold and the pressure stabilizing chamber, so that the intake manifold faces the intake bend (b) Change the structure of the intake elbows in the traditional structure in a comb-shaped distribution, and reduce the distance between the intake elbows at the middle position, so that each intake elbow is wide at both ends and narrow in the middle distribution form, (c) control the length of each intake elbow, (d) control the length, width and height of the intake manifold; from two aspects to ensure the charging efficiency of the cylinder and the overall performance of the engine: (a ) A transitional arc of R90~R110mm is provided at the connection position between the intake manifold and the plenum chamber to eliminate the airflow interference caused by the reduced angle between the intake manifold and the plenum chamber, (b) each intake bend The inner diameter of the tube was increased to 46-48mm.

The inner cavity cross-sectional area of the intake manifold (1) and the plenum chamber (2) is the largest at the connection position of the two, and the inner cavity sectional area of the intake manifold (1) faces away from the plenum chamber (2). direction gradually decreases, and the cross-sectional area of the plenum chamber (2) gradually decreases toward the direction away from the intake manifold (1), which further ensures smooth air flow at the connection position between the intake manifold and the plenum chamber, thereby improving the cylinder's performance. Inflation efficiency improves engine performance.

As a preference, the included angle between the intake manifold (1) and the plenum chamber (2) is 128°, and the transition arc set at the connection position between the intake manifold (1) and the plenum chamber (2) is R100mm, the length of each intake elbow (3) is 360mm, and the inner diameter is 47mm, and L×W×H in the intake manifold is 1433×1316×197mm.

The beneficial effect of the utility model is that the overall structure is compact, the cost is low, the gas charging efficiency of the cylinder is high, and the power performance of the engine is good.

Description of drawings

Fig. 1 is the front view of the utility model.

Figure 2 is the right side view of Figure 1.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

An automobile engine intake manifold as shown in Figures 1 and 2, consists of an intake manifold 1, a pressure stabilizing chamber 2, multiple intake elbows 3 arranged side by side, a throttle valve mounting flange 4, and a cylinder head mounting method Blue 5, each component is made of engineering plastics. The intake main pipe 1, the plenum chamber 2 and the intake elbow 3 are connected in sequence, the plenum chamber 2 is straightly arranged, and the intake main pipe 1 is obliquely upturned. Throttle valve mounting flange 4 is connected with intake manifold 1, the other end is connected with throttle valve, cylinder head mounting flange 5 is connected with intake elbow 3, and the other end is connected with cylinder, the air enters through the throttle valve, and passes through the intake air in turn. Main pipe 1, pressure stabilizing chamber 2, intake elbow 3, are air cylinder inflation, and the quantity of intake elbow 3 pipe 3 is identical with the quantity of cylinder, and above-mentioned is identical with traditional structure.

The difference is that the angle between the intake manifold 1 and the plenum chamber 2 is 128°, the connection position between the intake manifold 1 and the plenum chamber 2 is provided with a transition arc of R100mm, and each intake elbow 3 is in the middle The distance at the position is smaller than the distance between the two ends, so that each intake elbow 3 has a structure with wide ends and a narrow middle as a whole. The length of each intake elbow 3 is 360mm, and the specific shape of the intake elbow 3 can be adjusted according to the specific vehicle model; the inner diameter of each intake elbow 3 is the same, both are 47mm, and the L×W× H is 1433×1316×197mm. The cross-sectional area of the inner cavity of the intake manifold 1 and the plenum 2 at the connection position of the two is the largest, and the sectional area of the inner cavity of the intake manifold 1 gradually decreases toward the direction away from the plenum 2, and the sectional area of the plenum 2 The cross-sectional area of the inner cavity gradually decreases toward the direction away from the intake manifold 1, further ensuring smooth airflow at the angled position.

The torque performance comparison between the automobile engine intake manifold with the above structure (referred to as "short manifold") and the "automotive engine intake manifold" (public number 101705890A, referred to as "long manifold") disclosed by the State Intellectual Property Office is as follows surface:

As can be seen from the above torque performance comparison table, the torque of the engine equipped with the utility model at a speed below 3000RPM is greater than that of the long manifold, and the torque at the speed of 3500-5500RPM is slightly lower than that of the long manifold, and it is in the range of 5500-6000RPM The torque is also greater than that of the long manifold. The engine speed in the common driving conditions of automobiles is about 2000RPM, and the engine torque within this speed range is the decisive factor affecting the dynamic performance of the automobile. Both can ensure the charging efficiency of the cylinder and provide sufficient torque for the engine. The engine torque under common driving conditions is even greater than that of the long manifold, which significantly improves the overall performance of the engine.

The above is the preference of the present utility model, and is not limited to the above-mentioned structural forms and specific dimensions. In fact, it has been verified by experiments that the angle between the intake main pipe 1 and the plenum chamber 2 is 123-128°. A transitional arc of R90-R110mm is set at the connection position between the gas main pipe 1 and the pressure-stabilizing chamber 2, the length of each intake elbow 3 is 350-370mm, the inner diameter is 46-48mm, and the length of the intake manifold is L ≤1435mm, width dimension W≤1320mm, height dimension H≤200mm, all of which can meet the design requirements.

Claims (3)

1. An intake manifold for an automobile engine, including an intake manifold (1), a pressure stabilizing chamber (2), multiple intake elbows (3) arranged side by side, a throttle valve mounting flange (4), and a cylinder head The installation flange (5), the intake manifold (1), the pressure stabilizing chamber (2) and the intake elbow (3) are connected in sequence, and the throttle valve installation flange (4) is connected to the intake manifold (1) connected, the cylinder head mounting flange (5) is connected to the intake elbow (3), and it is characterized in that: the clamp between the intake manifold (1) and the pressure stabilizing chamber (2) is 123-128° corner, a transition arc of R90-R110mm is set at the connection position between the intake manifold (1) and the plenum chamber (2), and the distance between each intake elbow (3) in the middle is smaller than that at both ends. The length of the intake elbow (3) is 350-370mm, and the inner diameter is 46-48mm. The length of the intake manifold is L≤1435mm, the width W≤1320mm, and the height H≤200mm. 2. The automobile engine intake manifold according to claim 1, characterized in that: the inner cavity cross-sectional area of the intake manifold (1) and the pressure stabilizing chamber (2) at the connection position of the two is the largest, and The cross-sectional area of the inner cavity of the intake manifold (1) gradually decreases toward the direction away from the plenum chamber (2), and the cross-sectional area of the inner cavity of the plenum chamber (2) gradually decreases toward the direction away from the intake manifold (1). 3. The automobile engine intake manifold according to claim 1, characterized in that: the angle between the intake manifold (1) and the pressure stabilizing chamber (2) is 128°, and the intake manifold (1) The transition arc set at the connection position with the plenum chamber (2) is R100mm, the length of each intake elbow (3) is 360mm, and the inner diameter is 47mm, and the L×W×H in the intake manifold is 1433×1316×197mm.

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