CN203847237U

CN203847237U - Return-pressure-variable air inlet resonator for internal combustion engine

Info

Publication number: CN203847237U
Application number: CN201420097038.0U
Authority: CN
Inventors: 孟启平
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-03-05
Filing date: 2014-03-05
Publication date: 2014-09-24
Anticipated expiration: 2024-03-05

Abstract

The utility model discloses a return-pressure-variable air inlet resonator for an internal combustion engine. The return-pressure-variable air inlet resonator comprises a breather pipe, wherein the inner diameter of one end of the breather pipe is gradually contracted; the end of the breather pipe is in the shape of a Venturi pipe; a horn-mouth-shaped ring is arranged in the breather pipe; a back side of the horn-mouth-shaped ring is fixedly connected with one end of a hollow cylindrical pipe integrally; the inner edge of the Venturi-pipe-shaped end opening is the shape of a blade point; the lower end opening of the inner edge of the horn-mouth-shaped ring is also in the shape of a blade point; the cylindrical pipe is connected with the outer edge of the horn-mouth-shaped ring; the outer wall of the cylindrical pipe is fixedly connected with a fixing plate; the cylindrical pipe is connected with the inner wall of the breather pipe through the fixing plate; and the inclination of the Venturi-pipe-shaped end opening and the inclination of the horn-mouth-shaped ring are 30-50 degrees. By using the return-pressure-variable air inlet resonator for the internal combustion engine, gas in a cylinder of the internal combustion engine and fuel oil can generate mixed gas with optimized air-fuel ratio, the mixed gas can be sufficiently combusted, the explosive shock wave can be increased, the power of the engine can be improved, and the emission load of harmful tail gas is reduced; and sound field distribution in the thermo-acoustic is optimized, the air inlet noise is reduced, the adaptive ability of the engine is improved, and the efficiency of conversion of heat into power can also be improved.

Description

A kind of internal-combustion engine variable back pressure Intake resonator

Technical field

The utility model relates to air-intake device for internal combustion engine, specifically a kind of internal-combustion engine variable back pressure Intake resonator being arranged in suction tude.

Background technique

Improve the power per liter of internal-combustion engine, can improve effect of internal-combustion engine, strengthening air inflow is a solution, if internal-combustion engine adopts natural aspiration method, improve again air inflow, can be by improving scavenging efficiency, the flowing velocity that improves gas improves the intake and exhaust amount in the unit time.

The exhaust of internal-combustion engine is due to the working principle of motor, the blast of exhaust is that a ripple one rolling land pulse is discharged, each ripple of discharging blast all can be at the larger pressure of outlet pipe internal form, in the time that this ripple blast starts outwards discharge in outlet pipe, will form a negative pressure, namely said back pressure to a rear ripple blast.Back pressure is larger, internal combustion engine at slow-revving blast owing to being subject to the impact of last ripple blast, will be sooner by the negative pressure sucking-off of last ripple waviness, that is to say that exhaust effect is better, but in the time that engine arrives high revolution, because the internal diameter of outlet pipe is less, cause the gas temperature in outlet pipe to increase, not only next ripple blast of sucking-off as early as possible of gas expansion pressure, on the contrary the discharge of each wave is caused to suitable resistance, and interact between each ripple blast, different rotating speeds causes exhaust not smoothly, thereby reduce the aeration quantity of internal-combustion engine, the charging efficiency of internal-combustion engine single cylinder is reduced, less air impact air fuel ratio in firing chamber, make incomplete combustion, cause the discharge amount of waste gas larger, power declines, oil consumption increases, in the time that motor starts air inlet program, intake valve slightly lags behind and just opens, within this utmost point short time, initial air inlet heats up because being obstructed, volumetric expansion and rebounding, and follow-up air inlet and bounce-back gas collisions form pulse phenomenon, this phenomenon can affect the aeration quantity of cylinder, burning is had some setbacks, cause engine power to decline, also increased the discharge of exhaust pollutant.

Existing improvement air-intake of combustion engine, exhaust situation, improve the method for scavenging efficiency, normally the outlet pipe of combustion motor is transformed, for example mechanical type turbo charging installation, utilization reaches the strength of certain exhaust and carrys out rotary turbine, air is forced overcome resistance after supercharging to send into cylinder through menifold, can improve the aeration quantity of cylinder, but this apparatus structure complexity, also need Special temperature resistant material, manufacture cost is high, and in the time of internal-combustion engine low-speed running, this mechanical type turbo charging installation does not have the effect of supercharging yet.

Model utility content

The purpose of this utility model is the air inlet backflow pulse problem existing for above-mentioned motor, and provides one can promote gas handling system smoothness, improves the internal-combustion engine variable back pressure Intake resonator of engine power performance.

The purpose of this utility model is to realize by following technological scheme:

A kind of internal-combustion engine variable back pressure Intake resonator, comprise that one end is internal diameter convergent, be the breathing pipe of venturi shaped, in described breathing pipe, be provided with toroidal annulus, one end of the dorsal part of toroidal annulus and a hollow cylindrical tube fixes as one, the interior bead of described venturi shaped port is knife edge shape, and in described toroidal annulus, the lower end mouth on edge is knife edge shape.

Described cylindrical tube is connected with the outer of toroidal annulus.

The outer wall of described cylindrical tube is connected with fixed plate, and cylindrical tube is connected with the inwall of breathing pipe by fixed plate.

The gradient of described venturi shaped port, toroidal annulus is 30～50o, and preferred gradient is 46o.

The utility model is by the pull of vacuum of motor own, ambient air is sucked, when air stream produces high velocity air during through convergent breathing pipe cutting edge of a knife or a sword mouth, and gas moment is amplified, mineralization pressure is poor, produce high velocity air propelling pressure, can stop the part backflow pulse that engine charge produces, toroidal annulus the form venturi shaped same with cylindrical tube arranging in breathing pipe, further stop the part backflow pulse that engine charge produces from the middle part of breathing pipe, from suppressing near aspect, two, middle part in breathing pipe tube wall inner side and pipe the backflow pulse that engine charge produces, and improve the aeration quantity of unit time cylinder by the rebounding force of pulse back pressure, the mixed gas that promotes gas gas in the jar and fuel oil to produce optimization air fuel ratio fully burns, improve explosive blast, contribute to improve engine power, reduce Tail Gas discharge amount, to energy-conservation, environmental protection all has positive effect, meanwhile, this installation optimization sound field in thermoacoustic engine distribute, reduce inflow noise, improve the adaptive ability of motor, improve hot merit conversion efficiency.

Brief description of the drawings

Fig. 1 is the equipped structural representation of the utility model embodiment internal-combustion engine variable back pressure Intake resonator and suction tude.

In figure, 1. interior bead 3. annulus 4. cylindrical tube 5. lower end mouth 6. fixed plate 7. suction tude of breathing pipe 2..

Embodiment

Below in conjunction with drawings and Examples, the utility model content is further elaborated, but is not to restriction of the present utility model.

Embodiment:

With reference to Fig. 1, a kind of internal-combustion engine variable back pressure Intake resonator, comprise that one end is internal diameter convergent, be the breathing pipe 1 of venturi shaped, in described breathing pipe 1, be provided with toroidal annulus 3, one end of the dorsal part of toroidal annulus 3 and a hollow cylindrical tube 4 fixes as one, and the interior bead 2 of described venturi shaped port is knife edge shape, and the lower end mouth 5 on described toroidal annulus 3 interior edges is knife edge shape.

Described cylindrical tube 4 is connected with the outer of toroidal annulus 3.

The outer wall of described cylindrical tube 4 is connected with fixed plate 6, and cylindrical tube 4 is connected with the inwall of breathing pipe 1 by fixed plate 6.

Arrow in figure represents airflow direction.

The internal diameter of the lower end mouth 5 on the interior bead 2 of venturi shaped port and annulus 3 interior edges is adjusted size according to the difference of engine swept volume, and the gradient of venturi shaped port, toroidal annulus 3 is 30～50o, and this routine gradient is 46o, can reach good effect.

As shown in Figure 1, this device is arranged in suction tude 7, be close to suction tude 7 inwalls, the lower end mouth 5 on the interior bead 2 of venturi shaped port and annulus 3 interior edges is all towards motor end, when work, by the pull of vacuum of motor own, ambient air is sucked, when air stream produces high velocity air during through convergent breathing pipe 1 cutting edge of a knife or a sword mouth, and gas moment is amplified, mineralization pressure is poor, produce high velocity air propelling pressure, stop the part backflow pulse that engine charge produces, toroidal annulus 3 formation same with cylindrical tube 4 venturi shaped of breathing pipe 1 interior setting, further stop the part backflow pulse that engine charge produces from the middle part of breathing pipe 1, from suppressing near aspect, two, middle part in breathing pipe 1 tube wall inner side and pipe the backflow pulse that engine charge produces, and improve the aeration quantity of unit time cylinder by the rebounding force of pulse back pressure, meanwhile, this installation optimization sound field in thermoacoustic engine distribute, reduced inflow noise.

Claims

1. an internal-combustion engine variable back pressure Intake resonator, it is characterized in that: comprise that one end is internal diameter convergent, be the breathing pipe of venturi shaped, in described breathing pipe, be provided with toroidal annulus, one end of the dorsal part of toroidal annulus and a hollow cylindrical tube fixes as one, the interior bead of described venturi shaped port is knife edge shape, and in described toroidal annulus, the lower end mouth on edge is knife edge shape.

2. internal-combustion engine variable back pressure Intake resonator according to claim 1, is characterized in that: described cylindrical tube is connected with the outer of toroidal annulus.

3. internal-combustion engine variable back pressure Intake resonator according to claim 1, is characterized in that: the outer wall of described cylindrical tube is connected with fixed plate, and cylindrical tube is connected with the inwall of breathing pipe by fixed plate.

4. internal-combustion engine variable back pressure Intake resonator according to claim 1, is characterized in that: the gradient of described venturi shaped port, toroidal annulus is 30～50o.

5. internal-combustion engine variable back pressure Intake resonator according to claim 1, is characterized in that: the gradient of described venturi shaped port, toroidal annulus is 46o.