CN1991159A

CN1991159A - Method for manufacturing inlet manifold of internal combustion engine

Info

Publication number: CN1991159A
Application number: CN 200510121120
Authority: CN
Inventors: 宋旭东; 付天文
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2005-12-29
Filing date: 2005-12-29
Publication date: 2007-07-04

Abstract

The invention relates to a manufacturing method for inlet manifold of gas engine, comprising following procedures that A, the body of inlet manifold, tube body of inlet manifold and stead pressure cavity of inlet manifold are produced by injection molding method; B, the pressure cavity of inlet manifold and the tube body of inlet manifold are welded on the body respectively, namely the inlet manifold of gas engine demanded is produced. Plastic (reinforced nylon) inlet manifold can be produced easily by the method of invention. Not only the body weight is lessened greatly and the cost is decreased but also the smooth degree of inner air channel of inlet pipe is controlled very well so as to improve air fluidity, air flux, inlet efficiency, burning efficiency of engine and decrease the oil consumption. In low speed and loading, power and torque can be improved at certain extent. Meanwhile good air fluidity can decrease the vibration, noise, oil consumption and improve burning efficiency of engine.

Description

The manufacture method of inlet manifold of IC engine

Technical field

The present invention relates to a kind of improvement design of manufacture method of the intake manifold that is used for internal-combustion engine.

Background technique

Inlet manifold of IC engine is the very important device of motor, the one, the waste gas of the oil gas of air, crankcase ventilation and EGR (exhaust gas recirculatioon) is distributed to each cylinder equably; The 2nd, utilize the shape of intake manifold and pressure stabilizer and length to improve volumetric efficiency.

Intake manifold in the market mostly is to adopt aluminum alloy material, and not only quality is heavy, the price height, and the smooth degree of the inner air flue of the aluminum alloy suction tude of casting is difficult to be effectively controlled, can not effectively reduce the intake resistance of pipeline, the air inlet effect is bad, vibrates bigger.

For this reason, prior art has also been mentioned some and has been used the intake manifold that plastic or other material is made instead, but the moulding process aspect of plastic air intake manifold, if adopt traditional integrated injection molding, because the particularity of plastic material, not only have certain manufacture difficulty, cost is higher, and the control of the smooth degree of inner air flue still be can not get basic solution.So plastic air intake manifold does not still have wide-scale adoption now.

Summary of the invention

It is not enough to the objective of the invention is to overcome in the prior art the inner air flue smoothness of metal intake manifold, and plastic air intake manifold adopts traditional one-body molded production to be difficult to bigger improvement problem under at lower cost the prerequisite, proposes a kind of manufacture method of inlet manifold of IC engine.

For achieving the above object, the manufacture method of inlet manifold of IC engine of the present invention comprise the steps: A, with injection molding method production intake manifold body, intake manifold body and intake manifold pressure stabilizing cavity; B, intake manifold pressure stabilizing cavity and intake manifold body are welded to respectively on the intake manifold body, promptly can be made into desired inlet manifold of IC engine.

The present invention further comprises following feature:

When injection molding method is produced described intake manifold body, intake manifold body and intake manifold pressure stabilizing cavity in steps A, adopt the Reinforced Nylon material.

In step B, adopt 550～650 ℃ high-temperature soldering during welding.

After adopting above scheme, just can easier produce satisfactory plastic air intake manifold, the smooth degree of the inner air flue of intake manifold also can be controlled effectively and improve simultaneously.Not only alleviate the weight of itself greatly, reduced cost, and the smooth degree of the inner air flue of energy better controlled suction tude, thereby can improve gas fluidity, improve gas flow, the intake efficiency height improves engine combustion efficiency, reduces oil consumption.When low speed, low-load, power, moment of torsion can obtain certain raising.Good gas fluidity can reduce vibration simultaneously, reduces noise, improves engine combustion efficiency, reduces oil consumption.

Description of drawings

Fig. 1 is an intake manifold body schematic representation;

Fig. 2 is an intake manifold body schematic representation;

Fig. 3 is the intake manifold pressure stabilizing cavity;

Fig. 4 is welded to schematic representation on the intake manifold body for the intake manifold pressure stabilizing cavity;

Fig. 5 is welded to schematic representation on the intake manifold body for the intake manifold body;

Fig. 6 is for welding the intake manifold schematic representation after finishing.

Embodiment

Internal-combustion engine plastic air intake manifold of the present invention (Fig. 6) adopts the Reinforced Nylon material to make, it is made up of intake manifold body 1 (Fig. 1), intake manifold body 2 (Fig. 2) and intake manifold pressure stabilizing cavity 3 (Fig. 3), wherein intake manifold pressure stabilizing cavity 3 and intake manifold body 2 are welded to respectively that (Fig. 4, Fig. 5) can finish plastic air intake manifold (Fig. 6) on the intake manifold body 1, and wherein welding all adopts the high-temperature soldering of (550～650) ℃ to form after each part molding and forming.

Utilize the present invention, just can produce plastics (Reinforced Nylon) intake manifold easily, not only alleviated the weight of itself greatly, reduced cost, and the smooth degree of the inner air flue of energy better controlled suction tude, thereby gas fluidity can be improved, improve gas flow, the intake efficiency height improves engine combustion efficiency, reduces oil consumption.When low speed, low-load, power, moment of torsion can obtain certain raising.Good gas fluidity can reduce vibration simultaneously, reduces noise, improves engine combustion efficiency, reduces oil consumption.

Claims

1, a kind of manufacture method of inlet manifold of IC engine is characterized in that comprising the steps:

A, with injection molding method production intake manifold body (1), intake manifold body (2) and intake manifold pressure stabilizing cavity (3);

B, intake manifold pressure stabilizing cavity (3) and intake manifold body (2) are welded to respectively on the intake manifold body (1), promptly can be made into desired inlet manifold of IC engine.

2, the manufacture method of inlet manifold of IC engine as claimed in claim 1 is characterized in that: when injection molding method is produced described intake manifold body (1), intake manifold body (2) and intake manifold pressure stabilizing cavity (3) in steps A, adopt the Reinforced Nylon material.

3, the manufacture method of inlet manifold of IC engine as claimed in claim 1 is characterized in that: in step B, adopt the high-temperature soldering of (550～650) ℃ during welding.