CN2576987Y

CN2576987Y - Engine air-intake venturi apparatus

Info

Publication number: CN2576987Y
Application number: CN 02261126
Authority: CN
Inventors: 孟启平; 刘华
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-10-28
Filing date: 2002-10-28
Publication date: 2003-10-01
Anticipated expiration: 2012-10-28

Abstract

The utility model relates to an internal combustion engine technology, particularly an air inlet Venturi device connected in series between an air cleaner and an air inlet manifold of the internal combustion engine. The inner diameter of a port of the utility model connected with the air inlet manifold is smaller than the inner diameter of a port connected with the air cleaner; the utility model is of a Venturi-shaped with tapered inner diameter, the inner edge opening of the port is of a knife edge shape, and can connected in series with a gradually expanded pipe. The utility model can block the return pulse generated by charging air in an engine, can enhance air charging quantity in a cylinder in unit time, can prompt the inner part of the cylinder to combust completely, and can reduce the discharge quantity of harmful tail gas.

Description

The engine charge Venturi apparatus

Technical field:

The utility model relates to internal-combustion engine technology, particularly is serially connected in the air inlet system between combustion air cleaner and the inlet manifold.

Background technique:

Cylinder has only the air inflow of the abundance of sucking, could Maximum Power Output.There is such problem in conventional engines: when motor begins the air inlet program, intake valve has to lag behind slightly just to be opened, this utmost point in the short time initially air inlet heat up volumetric expansion and rebounding because of being obstructed, and follow-up air inlet and bounce-back gas collisions form pulse phenomenon.This phenomenon can influence the aeration quantity of cylinder, and burning is had some setbacks, and causes engine power to descend, and has also increased the discharging of exhaust pollutant.For addressing this problem, the mechanical type turbo charging installation once appearred, utilization reaches the strength of certain exhaust and comes rotary turbine, air is forced overcome resistance after the supercharging and send into cylinder through menifold, can improve the aeration quantity of cylinder, but this apparatus structure complexity also needs special temperature-resistant material, the manufacture cost height.

Summary of the invention:

The purpose of this utility model is to solve the air inlet backflow pulse problem that above-mentioned motor exists and a kind of gas handling system smoothness that can promote that designs, and improves the air inlet Venturi apparatus of engine power performance.

The utility model is not the Venturi tube that is used in Carburetor inside, but is serially connected between air-strainer and the inlet manifold.The port internal diameter that this device is connected with inlet manifold is less than the port internal diameter that is connected with air-strainer, and it is tubular that internal diameter gradually is Wen.Bead is knife edge shape in the port.The reducing pipe lower end mouth can be connected in series an internal diameter increaser, and the port internal diameter that it is connected with reducing pipe is less than the port internal diameter that is connected with inlet manifold, and bead is knife edge shape in the upper end-hole.

The utility model is by the pull of vacuum of motor own, and ambient air is sucked, and when air stream produces high velocity air during through reducing pipe trunnion cutting edge of a knife or a sword mouth, and gas moment is entered increaser amplifies, and form pressure difference.The high velocity air propelling pressure that utilizes the aditus laryngis place to produce, can stop the backflow pulse that engine charge produces, improve the aeration quantity of unit time cylinder, impel the fully burning of cylinder combustion oil, reduce harmful exhaust emissions amount, help to improve engine power, energy-saving and environmental protection are all had positive effect.

Description of drawings:

Fig. 1 is an internal diameter reducing pipe sectional view;

Fig. 2 is the sectional view behind the serial connection internal diameter increaser.

Embodiment:

With reference to Fig. 1.This Venturi tube is an internal diameter reducing pipe 1, and upper end-hole 2 is made one with being used for the adapter 4 that air-strainer is connected, cutting ring cutting edge of a knife or a sword shape in beads are in the lower end mouth 3, and upper end-hole 2 internal diameters are greater than lower end mouth 3 internal diameters.

With reference to Fig. 2.For further improving aditus laryngis place airspeed, at the foregoing description lower end mouth socket one internal diameter increaser 6, bead also is interior cutting ring cutting edge of a knife or a sword shape in its upper end-hole 5, and fits with port 3 knifes edge.Lower end mouth 7 is made one with being used for the adapter 8 that inlet manifold is connected, and upper end-hole 5 internal diameters are less than lower end mouth 7 internal diameters.

Claims

1, a kind of engine charge Venturi apparatus, port (3) internal diameter that it is characterized in that being connected with inlet manifold are less than the port that is connected with air-strainer (2) internal diameter, and the internal diameter convergent is Venturi tube (1) shape, and the interior bead of port (3) is knife edge shape.

2, air inlet Venturi apparatus according to claim 1, it is characterized in that reducing pipe (1) lower end mouth (3) serial connection one internal diameter increaser (6), port (5) internal diameter that it is connected with reducing pipe (1) is less than the port that is connected with inlet manifold (7) internal diameter, and the interior bead of port (5) is knife edge shape.