CN201526376U - variable volume intake manifold - Google Patents

Abstract

The utility model relates to a variable air flow intake manifold, which includes that an air inlet short opening communicated with an air outlet pipeline is directly manufactured on a middle sheet inside a steady pressure cavity corresponding to each air outlet passage; a conversion valve is installed on the air inlet short opening in sealing manner; valve leaves of the conversion valve are jointly installed on the same rotation shaft; the rotation is driven to swing through a vacuum valve installed at an input end on the lateral edge of the intake manifold; and the vacuum valve is controlled to move through an electromagnetic valve installed on the lateral edge of the middle sheet of the intake manifold. The variable air flow intake manifold adopts fast reflection method, is capable of guaranteeing to provide most suitable air quantity in time in corresponding working condition, has high air quantity control accuracy and good stability, can not only increase dynamic property of an engine, but also increase air intake speed under high rotation speed of the engine to enhance air flow strength of an air cylinder, thereby improving burning process and increasing economy of intermediate speed and low speed burning of the engine.

Description

variable volume intake manifold

technical field

The utility model relates to an intake manifold of an engine, in particular to a variable gas volume intake manifold.

Background technique

The intake manifold of the engine is intermittent and periodic during the intake process, resulting in a certain amplitude of pressure waves in the intake manifold, which propagate and reflect back and forth in the intake system at the speed of sound. If the intake manifold with a certain length and diameter and a resonance chamber with a certain volume form a resonant system, and its natural frequency is coordinated with the intake cycle of the valve, then at a specific speed, before the intake valve closes, A large pressure wave is generated in the intake manifold, which increases the pressure of the intake manifold, thereby increasing the intake air volume, which is the intake wave effect. The current intake manifold consists of an upper piece, a middle piece, a lower piece, and two lower pieces. An inlet elbow is formed on one side of the pipe; a pressure-stabilizing cavity is formed between the middle piece and the lower one and the lower two pieces; several outlet pipe ports are formed on the middle piece, and several channels are formed between the upper piece and the middle piece. Several passages communicate with respective air outlet pipes on the middle plate, and these passages communicate with the pressure stabilizing chamber. The intake manifold of the above-mentioned structural form is all constant to the intake air quantity and the intake air speed when the engine is running at a low speed and when the engine is running at a high speed.

We know that when the engine is running at a low speed, the intake manifold with a longer flow path can increase the intake speed, enhance the inertia of the airflow, and increase the intake air; The slender intake manifold will increase the intake resistance and reduce the intake air volume, thus affecting the performance of the engine.

Contents of the invention

The purpose of the utility model is to overcome the deficiencies of the prior art, and provide a variable air intake manifold which satisfies the air intake requirements of the engine under different working conditions by changing the intake air volume per unit time.

The utility model solves its technical problem and realizes through the following technical solutions:

A variable gas volume intake manifold, which consists of an upper piece, a middle piece, a lower piece, and two lower pieces. An intake elbow is formed on one side of the air manifold, and a pressure-stabilizing chamber is formed between the middle piece and the lower one and the lower two pieces; several air outlet pipes are formed on the middle piece, and corresponding air outlets are formed on the middle piece in the pressure-stabilizing chamber. There are several air inlets in the control, and several channels are formed between the upper piece and the middle piece, and the several channels are respectively connected to the respective air outlet pipes and air inlets. The channel directly forms the short intake port connected to the outlet pipe, and the switch valve is sealed and installed on the short intake port. The valve plates of the switch valve are installed together on the same transmission shaft. A vacuum valve installed is driven to swing, and the vacuum valve is controlled by a solenoid valve installed on the side of the intake manifold.

Moreover, a vacuum chamber is installed in the pressure stabilizing chamber, and the vacuum chamber communicates with the inlet of the solenoid valve through a gas pipe, and the outlet of the solenoid valve communicates with another gas pipe, and the gas pipe communicates with the vacuum valve.

Moreover, a connecting rod is connected to the end of the valve rod 15 of the vacuum valve 2, and the other end of the connecting rod is fixedly mounted with the transmission shaft of the valve plate.

Moreover, the pressure stabilizing chamber is also provided with cavity reinforcing ribs, and the inlet elbow and its connection with the stabilizing chamber are provided with transverse and longitudinal connecting reinforcing ribs.

Moreover, the inlet elbow and the outlet pipe are both arranged as flanges, and the flange surfaces are provided with sealing grooves.

Advantage and beneficial effect of the present utility model are:

1. The air intake manifold is directly made with short air intake ports connected to the air outlet pipes on the middle piece in the pressure stabilizing chamber corresponding to each air outlet channel. A switch valve composed of a valve seat and a valve plate is installed on the short air intake port. The valve plate of the valve is turned over by a transmission shaft installed on the outer side of the intake manifold, so as to close or open the short intake port, so that when the engine is running at high speed, the switching valve can be opened and the air Directly enter the short air intake port, the short and thick air intake port has low air intake resistance and increased air intake, which realizes the air intake of the engine under different working conditions of the intake manifold.

2. The transmission shaft of the intake manifold is driven by a vacuum valve, and the action of the vacuum valve is controlled by a solenoid valve through the vacuum chamber installed in the pressure-stabilizing chamber, so that the switching valve is opened and closed, thereby realizing the adjustment of the gas volume. The structure of the whole manifold is simple and compact, and the volume of the manifold is not increased.

3. The electronic control method of the utility model has a fast response speed, which can ensure the most suitable air volume in the corresponding working conditions in time. The control accuracy of the air volume is high and the stability is good. The air intake speed in the engine at high speed enhances the airflow intensity in the cylinder, thereby improving the combustion process and improving the fuel economy of the engine at low and medium speeds.

Description of drawings

Fig. 1 is the front view of the external structure of the utility model;

Fig. 2 is the top view of Fig. 1;

Fig. 3 is the left view of Fig. 1;

Fig. 4 is a structural schematic diagram of the pressure stabilizing cavity after the lower 1 and lower 2 pieces are removed in the utility model;

Figure 5 is an enlarged schematic view of Figure 3;

FIG. 6 is an enlarged schematic view of the cross-sectional structure along the line A-A of FIG. 4 .

Detailed ways

The utility model is described in further detail below through specific examples, the following examples are only descriptive, not limiting, and cannot limit the protection scope of the utility model with this.

A variable gas volume intake manifold, consisting of an upper piece 8, a middle piece 4, a lower piece 5, and a lower piece 6, and the upper piece, middle piece, lower piece, and lower 2 pieces are interlocked to form the intake manifold pipe, forming an intake elbow 7 on one side of the intake manifold; forming a pressure stabilizing chamber between the middle piece and the lower 1 piece and the lower 2 pieces; forming several air outlet pipes 3 (four in this embodiment) on the middle piece ), a number of air inlets 18 are formed on the middle piece corresponding to the air outlet pipe in the pressure stabilizing chamber, and several passages 17 are formed between the upper piece and the middle piece, and the several passages communicate with the respective air outlet pipes and air inlets respectively . The embodiment of the utility model is described below with the intake manifold of four passages as an example:

(1) On the middle piece in the pressure stabilizing chamber, corresponding to each air outlet channel, the air inlet short port connected to the air outlet pipeline is directly made, and a switch valve composed of a valve seat 9 and a valve plate 10 is sealed and installed on the air inlet short port, each The valve plates are all installed together on a transmission shaft 11, and the input end of the transmission shaft is installed with a connecting rod 16 on the side of the intake manifold, as shown in Figure 5, the connecting rod is mounted on the end of the valve stem 15 of the vacuum valve 2 , through the push and pull of the valve stem to realize the swing of the transmission shaft, so as to realize the flipping of the fixed valve plate in the valve seat,

(2) The transmission shaft of the intake manifold is driven by a vacuum valve, and the action of the vacuum valve is controlled by the solenoid valve 1 through the vacuum chambers 14 (refer to FIG. 4 , two) installed in the pressure-stabilizing chamber. Its action principle is: the vacuum gas in the vacuum chamber is connected to the inlet of the solenoid valve through the gas pipe 13, and the outlet of the solenoid valve is connected to another gas pipe 12, and the gas pipe is connected to the vacuum valve and drives the push-pull action of the valve stem of the vacuum valve.

(3) The pressure stabilizing chamber is also made with cavity reinforcing ribs, and the inlet elbow and its connection with the stabilizing chamber are provided with horizontal and vertical connecting ribs to ensure its pressure bearing capacity.

(4) The inlet elbow and the outlet pipe are both arranged as flanges, and the flange surface is provided with a sealing groove.

The utility model can effectively control the flow inertia of the intake airflow in the intake passage by changing the length of the intake manifold, so that the frequency of the flow pressure wave of the airflow and the frequency of the intake valve match in time under different working conditions, and the maximum Guarantee the intake air volume of the engine in any working condition to a certain extent. The essence of this manifold is to use the principle of medium inertia harmonic supercharging to realize the maximum air intake of the engine. When the engine speed is lower than 4400 rpm, the switching valve does not work, it is closed, and the airflow path is longer; when the engine speed is greater than 4400 rpm, the switching valve works, the switching valve is open, and the airflow path is shorter , so as to meet the demand for air volume in different working conditions. In addition, the intake manifold is opened to different openings at different water temperatures and speeds to meet the air requirements of the engine in various working conditions.

The working principle of the utility model is: under the same working condition, different switching valve openings make the flow rate of the air flow entering the engine change, forming a vortex, which is what we often call a vortex, making the oil and gas mixing of the engine more efficient. full. Especially when the engine is cold started at low temperature and the engine is under low load, the atomization of the mixture gas is not good, the combustion is not sufficient, and the emission is poor. In order to improve the atomization level of gasoline at low temperature and increase the engine emission level, the Mazda 6 emission The level reaches and exceeds Euro III standard.

Working process: When the water temperature is lower than about 62 degrees, and the engine speed is lower than 3750 rpm, the channel area of the intake pipe is reduced; as the water temperature further increases, the speed further increases, and the opening of the switching valve is fully opened, and then The area of the trachea reaches its maximum. As the name suggests, it does not control the opening of the intake manifold by the throttle cable, but uses a DC motor to automatically realize it through a reduction mechanism.

Function and working process: it has the basic function of an ordinary throttle valve, and its function is to open the channel of the intake manifold on the main pipe, and open different openings under different working conditions. Generally, the throttle valve of a car is driven by the pedal Throttle cable control. But this kind of cable-controlled throttle has intake hysteresis phenomenon in special working conditions such as rapid acceleration, that is to say, in special working conditions such as rapid acceleration, the throttle opening signal has been sent through the throttle valve position sensor, but The air actually entering the cylinder does not follow up in time, and the throttle valve is not very smooth under the airflow disturbance, so the air volume is not stable, and the acceleration is not ideal and unstable. The electronic throttle valve can directly drive the DC motor to respond quickly according to the throttle position signal, and open the throttle valve to the required opening in time, and the electronic throttle valve will not be affected by the airflow due to the self-locking action of its own deceleration mechanism. The disturbance fluctuates to ensure the stability of the intake air volume and rotational speed of the engine.

Claims (5)

1. variable air volume type air intake branch pipe, by last slice, middle sheet, following 1, following 2 constitute, last slice, middle sheet, following 1, following 2 mutual spiral-locks constitute intake manifold, form intake elbow in intake manifold one side, form pressure stabilizing cavity between middle sheet and following 1, following 2; On middle sheet, form several steam outlet pipes, be shaped on corresponding steam outlet pipe on the middle sheet in pressure stabilizing cavity and be shaped on several suction ports, last slice and middle sheet between form several passages, these several passages are communicated with steam outlet pipe and suction port separately respectively, it is characterized in that: corresponding each outlet passageway is directly made short mouthful of the air inlet that is communicated with outlet pipe on the middle sheet in pressure stabilizing cavity, changing valve is installed in sealing on the short mouth of air inlet, the valve block of changing valve is installed on the same transmission shaft jointly, this transmission shaft drives rotation by a vacuum valve of installing at the input end of intake manifold side, and vacuum valve is installed in the action of the electromagnetic valve on the sheet side in the intake manifold by one.

2. variable air volume type air intake branch pipe according to claim 1 is characterized in that: vacuum chamber is installed in pressure stabilizing cavity, and this vacuum chamber is by the import of tracheae connection solenoid valve, and the outlet of this solenoid valve is communicated with another tracheae, and this tracheae is communicated with vacuum valve.

3. variable air volume type air intake branch pipe according to claim 1 is characterized in that: described valve rod 15 ends at vacuum valve 2 connect a connecting rod, and the other end of this connecting rod installs the transmission shaft of valve block.

4. variable air volume type air intake branch pipe according to claim 1 is characterized in that: also be shaped on the cavity stiffening rib on the described pressure stabilizing cavity, intake elbow and be provided with laterally with the pressure stabilizing cavity joint and vertically be connected stiffening rib.

5. variable air volume type air intake branch pipe according to claim 1 is characterized in that: described intake elbow and steam outlet pipe place all are arranged to flange, and flanged surface is provided with seal groove.

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