CN202055963U

CN202055963U - High-pressure fuel oil distributing pipe used for GDI (gasoline direct injection) engine

Info

Publication number: CN202055963U
Application number: CN2011201472942U
Authority: CN
Inventors: 杨晴国; 张献忠; 杨华锋
Original assignee: Shanghai Zunma Stainless Steel Pipe Manufacturing Co ltd
Current assignee: SHANGHAI ZUNMA AUTO PIPE CO., LTD.
Priority date: 2011-05-10
Filing date: 2011-05-10
Publication date: 2011-11-30
Anticipated expiration: 2021-05-10

Abstract

The utility model discloses a high-pressure fuel oil distributing pipe used for a GDI (gasoline direct injection) engine, which comprises a pipe body. The pipe body is a circular welded pipe, with the length of 6000 mm - 6020 mm, the outside diameter of 70 plus/minus 0.3 mm, and the wall thickness of 1.18 mm - 1.2 mm, and a welded bump is larger than 0.1 mm but smaller than 0.15 mm. For the high-pressure fuel oil distributing pipe, the tensile strength is larger than or equal to 520 MPa, the yield strength is larger than or equal to 205 MPa, the percentage elongation after fracture is larger than or equal to 40 percent, the expansion rate is larger than or equal to 40 percent, and the hardness is smaller than or equal to 91 HRB (187 HB). The high-pressure fuel oil distributing pipe has higher length-diameter ratio, and does not need to be extended through connecting pipes for long-distance fuel oil transmission, thereby reducing leakage points in the fuel oil path.

Description

The employed high pressure fuel distribution pipe of a kind of GDI motor

Technical field

The utility model relates to a kind of technical field of automobile engine, is specifically related to the employed high pressure fuel distribution pipe of a kind of GDI motor.

Background technique

Along with Chinese automobile industry constantly, it has become the pillar industry of China.For automobile production producer, the technology of starting of automobile is the technology of core the most, for the product that can make oneself obtains Consumer's favor, can seize market, and automobile production producer does not stint and drops into the research and development that a huge sum of money is used for motor, for example:

Chang'an 1.3GDIT petrol engine, this starts to have adopted eight advanced technologies such as in-cylinder direct injection, turbosupercharging, electronic throttle, quiet chain timing driving, Dual Over Head Camshaft, import/exhaust VVT, hydraulic lash adjuster/roller rocker arms, piston oil spout cooling.1.3GDIT petrol engine adopts multinomial new advanced technology, peak output reaches 110kw, and moment of torsion has reached 220Nm, and power character has surpassed FIAT, the Audi of similar discharge capacity, the corresponding product of Mitsubishi, is genuine high-performance enginer.

BYD BYD473QB motor, this motor are a all-aluminium engines, adopt the exquisiteness design of the up-to-date big compression ratio of lightweight, compact appearance, and powerful, oil consumption is low, and operational noise is very little.The aluminium alloy compression casting cylinder body helps environmental protection, reduces complete vehicle weight, improves fuel economy; The BYD473QB engine stroke is long, and middle low-speed dynamic is better, and 2400r/min just can reach the above moment of torsion of 130Nm, reaches 140Nm from external characteristics figure torque peak; Timing system adopts silenet chain, and noise is little, and is non-maintaining; Connecting rod adopts the advanced breaking process technology that rises, reliability height; Intake manifold adopts moulds the ester shaping, and air flow resistance is little, and heat-insulating property is good; The high compression ratio design, the improvement combustion performance improves the thermal efficiency, reduces fuel consume.External characteristics contrast: 1,473QB possesses the characteristic that the low speed height turns round and can see that from external characteristic curve 473QB reaches first torque peak 134Nm at 2800 rev/mins; 4G15S reaches first moment of torsion peak 124Nm in the time of 3000 rev/mins, so 473QB has more the characteristic that the low speed height is turned round, and drives the vehicle starting of equipment 473QB and quickens faster.2,473QB has lower fuel consumption rate 473 owing to adopt light-weight design, has reduced fuel consumption rate, has also reduced the weight of car load simultaneously, is more conducive to fuel-efficient.

At present gasoline direct injection (Gasoline Direct Injection) motor is called for short the GDI motor, is the focus of external internal-combustion engine research and development in recent years.The expert thinks, the appearance of petrol engine direct injection technology makes the car engine machine technology enter a brand-new era, and it has the traditional petrol engine of replacement and the trend of diesel engine in 21 century, becomes the optimal power plant of car.

Traditional petrol engine be with gasoline injection in suction tude, and enters cylinder combustion after the air mixing again and burn, and the GDI motor is with the gasoline direct cylinder injection, utilize in the cylinder fuel atomization of air-flow and piston face to burn with air formation mixed gas.

The GDI motor has good working stability and load performance, cold starting performance has obtained obvious improvement simultaneously, can realize stratified mixture combustion, fuel economy improves greatly, its oil consumption can reach the level of turbo-charged direct injection (TDI) diesel engine, and omitted turbo charging installation, save complicated high-pressure injection system.GDI starts the function lean burn technology, air fuel ratio can be up to 40: 1, even reach as high as 100: 1, make power and torque all be higher than the conventional gasoline machine, oil consumption, noise and emission amount of carbon dioxide are all lower, and the uniformity of GDI engine operation, instantaneous reflection, startability etc. all have bigger improvement than conventional gasoline engin.Therefore various countries automobile production enterprise is all developing the GDI motor of this advanced technology, excellent performance energetically.

For motor no matter be traditional petrol engine or direct-injection engine, be that the GDI motor all will relate to fuel dispensing tube in producing and designing, the quality of distribution piping performance will directly influence the performance of motor, but the voltage endurance capability of available engine fuel dispensing tube is lower, and slenderness ratio is not high, need to adopt connection pipe fitting to prolong the length of fuel dispensing tube, therefore cause leakage easily.

The model utility content

The utility model is at the existing problem of available engine fuel dispensing tube, and provide a kind of GDI motor employed high pressure fuel distribution pipe, this high pressure fuel distribution pipe has higher voltage endurance capability and higher slenderness ratio, does not have leakage point for the oil transportation of longer distance.

In order to achieve the above object, the utility model adopts following technological scheme:

The employed high pressure fuel distribution pipe of a kind of GDI motor comprises a body, and described body is a welding pipe, the length of body is 6000mm～6020mm, external diameter is 70 ± 0.3mm, and wall thickness is 1.18mm～1.2mm, solder-bump greater than 0.1mm less than 0.15mm.

According to the utility model that such scheme obtains, its tensile strength 〉=520MPa; Yield strength 〉=205MPa; Elongation after fracture 〉=40%; Bulging rate 〉=40%; Hardness≤91HRB (187HB).Have higher slenderness ratio, need not by the connection pipe fitting spreading, reduced the generation of leakage point in the oil circuit for the oil transportation of longer distance.

Description of drawings

Further specify the utility model below in conjunction with the drawings and specific embodiments.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is a sectional view of the present utility model.

Embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

The employed high pressure fuel distribution pipe of GDI motor of the present utility model adopts structure as depicted in figs. 1 and 2.The employed high pressure fuel distribution pipe of this GDI motor comprises a body 100, and the length L of body 100 is 6000mm～6020mm, and outer diameter D is 70 ± 0.3mm, and wall thickness H is 1.18mm～1.2mm.

The utility model superior performance according to such scheme formation.

The utility model is when specific design, and technical requirements is as follows:

1, the every performance requirement of raw material must meet the standard of BL-BZ-01

Mechanical property requires:

Tensile strength 〉=520MPa;

Yield strength 〉=205MPa;

Elongation after fracture 〉=40%;

Bulging rate 〉=40%;

Hardness≤91HRB (187HB).

2, weld seam requirement

2.1 carry out inside and outside protection during the tubulation welding, reduce the polishing amount, the undercut dislocation can not appear in weld seam, and outside weld can not be used the hand mill reconditioning.

2.2 inside weld is silvery white, by the comparison of limit exemplar.

2.3 weld flush is greater than 0.1, less than 0.15.

2.4 do not allow repair welding, leak weldering, rosin joint, lack of penetration and misalignment defective.

3, surface quality requires:

3.1 can not there be pit on the surface.

3.2 inner and outer surface can not have wire drawing.

3.3 oral area ovality≤0.3.

4, other requirement:

The tubulation strip is when charging, and raw material strip surface will be passed through in the middle of being soaked with the cloth of alcohol, with the clean surface, improves weldquality, forbids oiling.

More than show and described basic principle of the present utility model, major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. the employed high pressure fuel distribution pipe of GDI motor comprises a body, it is characterized in that, described body is a welding pipe, and the length of body is 6000mm～6020mm, and external diameter is 70 ± 0.3mm, wall thickness is 1.18mm～1.2mm, solder-bump greater than 0.1mm less than 0.15mm.