CN210396929U

CN210396929U - Intake manifold with variable resonant cavity volume

Info

Publication number: CN210396929U
Application number: CN201921296813.4U
Authority: CN
Inventors: 石坚
Original assignee: Marelli China Co Ltd
Current assignee: Marelli China Co Ltd
Priority date: 2019-08-09
Filing date: 2019-08-09
Publication date: 2020-04-24
Anticipated expiration: 2029-08-09

Abstract

The utility model provides an intake manifold with variable resonant cavity volume, which comprises a resonant cavity, a communicating pipe and a pressure stabilizing cavity; the communicating pipe is connected with the resonant cavity and the voltage stabilizing cavity; the resonant cavity comprises a cavity body, a fixed plate, a baffle plate, a sliding plate, a screw rod and a motor; the fixed plate is fixedly arranged in the cavity; the periphery of the baffle is tightly attached to the inner wall of the cavity; the sliding plate is connected with the inner wall of the cavity body in a sliding manner; the screw rod is inserted into the sliding plate and the fixed plate along the axial direction of the cavity, is rotatably connected with the sliding plate and is in threaded connection with the fixed plate; one end of the screw rod is fixedly connected with the baffle, and the other end of the screw rod is fixedly connected with a rotating shaft of the motor; the motor is fixedly connected with the sliding plate and drives the screw rod to rotate around the axial direction of the screw rod; the utility model discloses changeable air intake manifold of resonant cavity volume is through the volume that changes the resonant cavity, and resonance frequency that can electrodeless regulation air intake system makes the engine can both have fine resonance effect when arbitrary rotational speed.

Description

Intake manifold with variable resonant cavity volume

Technical Field

The utility model relates to a gasoline engine electrical system technical field especially relates to a variable intake manifold's of resonant cavity volume technical field.

Background

If a resonant air intake system is formed by the air intake manifold with a certain length and diameter and the resonant chamber with a certain volume, and the natural frequency of the resonant system is coordinated with the air intake period of the valve, the large-amplitude pressure wave is generated in the air intake manifold before the air intake valve is closed at a specific rotating speed, so that the pressure of the air intake manifold is increased, and the air intake amount is increased.

However, during the operation of the automobile, the rotation speed of the engine is not a fixed value, and along with the change of the rotation speed of the engine, when the wave generated by the next air intake of the cylinder is not matched with or even opposite to the residual fluctuation phase in the air intake system, the air intake is not facilitated, and the charge coefficient is reduced. Therefore, the air intake system needs to be capable of adjusting the system parameters of the air intake system and changing the resonance frequency, so that the engine has a good resonance effect near a plurality of rotating speeds.

SUMMERY OF THE UTILITY MODEL

To prior art's defect, the utility model provides a changeable air intake manifold of resonant cavity volume through the volume that changes the resonant cavity, can electrodeless regulation air intake system's resonant frequency, makes the engine can both have fine resonance effect when arbitrary rotational speed.

The utility model discloses a solve above-mentioned technical problem and adopt following technical scheme:

an intake manifold with a variable resonant cavity volume comprises a resonant cavity, a communicating pipe and a pressure stabilizing cavity; the communicating pipe is connected with the resonant cavity and the voltage stabilizing cavity; the resonant cavity comprises a cavity body, a fixed plate, a baffle plate, a sliding plate, a screw rod and a motor; the cavity is in a cylindrical barrel shape with one end opened; the fixing plate is fixedly arranged in the cavity; the periphery of the baffle is tightly attached to the inner wall of the cavity, and the baffle is positioned on one side of the fixing plate, which is far away from the opening of the cavity; the sliding plate is connected with the inner wall of the cavity body in a sliding mode and is positioned on one side, close to the opening of the cavity body, of the fixed plate; the screw rod is inserted into the sliding plate and the fixed plate along the axial direction of the cavity, is rotatably connected with the sliding plate and is in threaded connection with the fixed plate; one end of the screw rod is fixedly connected with the baffle, and the other end of the screw rod is fixedly connected with a rotating shaft of the motor; the motor is fixedly connected to the sliding plate and drives the screw rod to rotate around the axial direction of the screw rod.

In the above intake manifold with a variable resonant cavity volume, a joint between the communicating pipe and the resonant cavity is located at the other end of the cavity opposite to the cavity opening.

In the above intake manifold with a variable resonant cavity volume, a plurality of sliding chutes are formed in the inner wall of the cavity near the opening, and the extending directions of the sliding chutes are parallel to the axial direction of the cavity; a plurality of bulges are arranged on the periphery of the sliding plate; the sliding grooves correspond to the bulges one by one, and the bulges are inserted into the corresponding sliding grooves.

The above intake manifold with a variable resonant cavity volume, wherein the periphery of the baffle is sealed with the inner wall of the cavity.

The intake manifold with the variable resonant cavity volume is characterized in that a circle of sealing strip is pasted on the periphery of the baffle, and the baffle is pasted with the sealing strip through high-temperature-resistant glue.

The intake manifold with the variable resonant cavity volume is characterized in that the motor is a stepping motor.

The utility model adopts the above technical scheme, compare with prior art, have following technological effect: through the volume that changes the resonant cavity, realize changing air intake system's resonant frequency's effect to because the volume of resonant cavity can the continuous variation, the utility model discloses the variable air intake manifold of resonant cavity volume can electrodeless regulation air intake system's resonant frequency, makes the engine can both have fine resonance effect when arbitrary rotational speed.

Drawings

FIG. 1 is a schematic structural view of an intake manifold with a variable resonator volume according to the present invention;

FIG. 2 is a right side view of the cavity of the variable cavity intake manifold of the present invention;

figure 3 is a right side view of the sliding plate of the variable cavity volume intake manifold of the present invention.

In the drawings:

1. an air inlet pipe; 2. an air outlet pipe; 3. a voltage stabilizing cavity; 4. a communicating pipe; 5. a resonant cavity; 51. a cavity; 511. a chute; 52. a fixing plate; 53. a sliding plate; 531. a protrusion; 54. a baffle plate; 55. a screw rod; 56. an electric motor.

Detailed Description

The technical solution of the present invention will be described in further detail with reference to the accompanying drawings, which are not intended to limit the present invention.

Referring to fig. 1, an intake manifold with a variable resonant cavity volume according to an embodiment of the present invention includes a resonant cavity 5, a communicating pipe 4, a pressure stabilizing cavity 3, an intake pipe 1, and a plurality of outlet pipes 2; the air inlet pipe 1 and the air outlet pipes 2 are communicated with the pressure stabilizing cavity 3, air enters the pressure stabilizing cavity 3 from the air inlet pipe 1 and then enters each cylinder from the air outlet pipes 2 respectively, and the air is uniformly distributed to each cylinder as far as possible. In this embodiment, there are four air outlet pipes 2 for providing air and fuel mixture to four cylinders respectively, and in practical application, the number of the air outlet pipes 2 should match the number of the cylinders, and the number of the air outlet pipes 2 is not related to the technical effect achieved by the present application, and is not limited herein.

The communicating pipe 4 is connected with the resonant cavity 5 and the pressure stabilizing cavity 3, gas enters the resonant cavity 5 from the communicating pipe 4 and generates resonance, and then returns to the pressure stabilizing cavity 3 to generate pressure waves through resonance. If the pressure wave generated by the next air intake of the cylinder is in phase coincidence with the pressure wave generated by the resonance in the air intake system, and the synthesis effect of each wave is positive pressure wave, the cylinder is beneficial to subsequent air intake, so that the charge coefficient is increased.

The resonant cavity 5 comprises a cavity body 51, a fixed plate 52, a baffle plate 54, a sliding plate 53, a screw rod 55 and a motor 56; the chamber 51 is a cylindrical barrel with one open end. The fixed plate 52 is fixedly disposed within the cavity 51. The periphery of the baffle 54 is tightly attached to the inner wall of the cavity 51, and the baffle 54 is located on the side of the fixing plate 52 far away from the opening of the cavity 51. The sliding plate 53 is slidably connected to the inner wall of the chamber 51, and the sliding plate 53 is located on the side of the fixed plate 52 close to the opening of the chamber 51. The lead screw 55 is inserted into the slide plate 53 and the fixed plate 52 in the axial direction of the chamber body 51, and is rotatably coupled to the slide plate 53 and is screw-coupled to the fixed plate 52. One end of the screw 55 is fixedly connected to the baffle 54, and the other end is fixedly connected to a rotating shaft of a motor 56. The motor 56 is fixedly connected to the slide plate 53 and drives the screw 55 to rotate about the axial direction of the screw 55.

The motor 56 drives the screw 55 to rotate, and the screw 55 moves along the axial direction of the resonant cavity 5 due to the threaded connection between the screw 55 and the fixed plate 52, and at this time, the motor 56 and the sliding plate 53 move together with the screw 55. Since one end of the screw 55 is fixedly connected to the baffle 54, the screw 55 drives the baffle 54 to rotate together and move along the axial direction of the resonant cavity 5, so as to adjust the distance between the baffle 54 and the bottom of the cavity 51, i.e. adjust the volume of the resonant cavity 5.

In this embodiment, the volume of the resonant cavity is controlled by detecting the rotational speed of the engine, calculating the required volume of the resonant cavity 5 by a control system in the automobile, and sending a signal to the motor 56. Other methods, such as detecting the speed of the vehicle, may also be used. Because the volume of resonant cavity 5 can be in certain extent continuous variation, consequently the utility model discloses the changeable air intake manifold of resonant cavity volume can electrodeless regulation air intake system's resonant frequency, makes the engine can both have fine resonance effect when arbitrary rotational speed.

The present invention also has the following embodiments in addition to the above:

in a further embodiment of the present invention, the connection position of communication pipe 4 and resonant cavity 5 is located at the other end of cavity 51 opposite to the opening of cavity 51. When the baffle 54 is attached to the bottom of the cavity 51, that is, the volume of the resonant cavity is zero, the joint of the communicating pipe 4 and the resonant cavity 5 is still between the baffle 54 and the cavity 51, so that the joint of the communicating pipe 4 and the resonant cavity 5 cannot move to the outer side of the baffle 54, and air leakage is prevented.

In a further embodiment of the present invention, referring to fig. 2 and fig. 3, the wall of the cavity 51 near the opening is provided with a plurality of sliding slots 511, and the extending directions of the sliding slots 511 are all parallel to the axial direction of the cavity 51. The sliding plate 53 is provided with a plurality of protrusions 531 at the periphery thereof. The sliding grooves 511 correspond to the protrusions 531 one by one, and the protrusions 531 are inserted into the corresponding sliding grooves 511, so that the sliding plate 53 can only move along the extending direction of the sliding grooves 511, and the sliding plate 53 is prevented from rotating around the axial direction of the cavity 51. It is understood that the same technical effect can be achieved by providing a guide rail on the inner wall of the cavity 51 and moving the sliding plate 53 along the extending direction of the guide rail, or using other means to ensure the sliding connection between the sliding plate 53 and the cavity 51, which is not limited herein. However, the provision of the groove 511 on the inner wall of the cavity 51 is advantageous over the provision of the guide rail on the inner wall of the cavity 51 in that the installation of the barrier 54 and the fixing plate 52 is facilitated, and the guide rail may cause an obstruction when the barrier 54 and the fixing plate 52 enter the cavity 51.

In a further embodiment of the invention, the periphery of the baffle 54 is sealed against the inner wall of the chamber 51. In this embodiment, a circle of sealing strip is adhered around the baffle 54 to ensure sealing between the baffle 54 and the cavity 51, so as to prevent air leakage, and the sealing strip is adhered with high-temperature-resistant glue to prevent the glue from losing efficacy due to heat generated by friction between the sealing strip and the inner wall of the cavity 51 when the baffle 54 moves back and forth for multiple times. Other methods may also be used to ensure the sealing between the baffle 54 and the cavity 51, for example, a high temperature resistant, wear resistant and sealing material, such as a glass fiber reinforced nylon material, is directly used to manufacture the baffle 54, which can achieve the same technical effect, and is not limited herein.

In a further embodiment of the present invention, the motor 56 is a step motor for accurately stopping the baffle 54 to a fixed position, thereby improving the accuracy of adjusting the volume of the resonant cavity 5.

The present invention has been described in detail with reference to the specific embodiments, but the present invention is only by way of example and is not limited to the specific embodiments described above. Any equivalent modifications and substitutions to those skilled in the art are intended to be within the scope of the present invention. Accordingly, variations and modifications in equivalents may be made without departing from the spirit and scope of the invention, which is intended to be covered by the following claims.

Claims

1. An intake manifold with a variable resonant cavity volume is characterized by comprising a resonant cavity, a communicating pipe and a pressure stabilizing cavity; the communicating pipe is connected with the resonant cavity and the voltage stabilizing cavity;

the resonant cavity comprises a cavity body, a fixed plate, a baffle plate, a sliding plate, a screw rod and a motor;

the cavity is in a cylindrical barrel shape with one end opened; the fixing plate is fixedly arranged in the cavity; the periphery of the baffle is tightly attached to the inner wall of the cavity, and the baffle is positioned on one side of the fixing plate, which is far away from the opening of the cavity; the sliding plate is connected with the inner wall of the cavity body in a sliding mode and is positioned on one side, close to the opening of the cavity body, of the fixed plate;

the screw rod is inserted into the sliding plate and the fixed plate along the axial direction of the cavity, is rotatably connected with the sliding plate and is in threaded connection with the fixed plate; one end of the screw rod is fixedly connected with the baffle, and the other end of the screw rod is fixedly connected with a rotating shaft of the motor;

the motor is fixedly connected to the sliding plate and drives the screw rod to rotate around the axial direction of the screw rod.

2. An intake manifold having a variable resonator volume according to claim 1, wherein the connection between the communicating tube and the resonator is at the other end of the cavity opposite the cavity opening.

3. The intake manifold with a variable resonant cavity volume according to claim 1, wherein a plurality of chutes are formed in the inner wall of the cavity near the opening, and the extending directions of the chutes are all parallel to the axial direction of the cavity; a plurality of bulges are arranged on the periphery of the sliding plate; the sliding grooves correspond to the bulges one by one, and the bulges are inserted into the corresponding sliding grooves.

4. A resonant cavity variable volume intake manifold as claimed in claim 1, wherein the periphery of the baffle is sealed to the inner wall of the cavity.

5. The intake manifold with a variable resonant cavity volume as claimed in claim 4, wherein a ring of sealing strips is adhered around the baffle, and the baffle and the sealing strips are adhered by a high temperature resistant adhesive.

6. A variable cavity volume intake manifold as claimed in claim 1, wherein the motor is a stepper motor.