CN202215360U

CN202215360U - Automobile engine noise-reduction structure

Info

Publication number: CN202215360U
Application number: CN2011202740483U
Authority: CN
Inventors: 田明; 屈伟; 边锋
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2011-07-31
Filing date: 2011-07-31
Publication date: 2012-05-09
Anticipated expiration: 2021-07-31

Abstract

The utility model relates to a sound-insulation noise-reduction device, in particular to an automobile engine noise-reduction structure which achieves noise-reduction effect to noise producing members in a wrapping and sleeving mode. A noise-reduction structure body is formed by fastening an upper sound-insulation body (24) and a lower sound-insulation body (18), and a cavity which is formed by fastening and capable of accommodating a high pressure oil rail (20) is arranged in the body. When the noise-reduction structure defines the high pressure oil rail (20) in the cavity in a wrapping mode, an keeping-clear portion for keeping clear parts of a cylinder cover assembly under the wrapping state is arranged on the noise-reduction structure body. By means of the technical scheme, the high pressure oil rail is wrapped by fastening the upper sound-insulation body and the lower sound-insulation body, an inlet manifold and a cylinder are separated by the noise-reduction device, and produced noise during resonance is decreased. Simultaneously, noise produced at the position of the high pressure oil rail is effectively separated from the outside, thereby improving quality of finished automobiles.

Description

The motor car engine denoising structure

Technical field

The utility model relates to a kind of sound insulation and noise reduction device, relates in particular to a kind of through carrying out the motor car engine denoising structure that jacket is realized noise reduction to producing the noise parts.

Background technique

Along with the renewal day by day of science and technology, client is increasingly high to the travelling comfort requirement of car load, and engine noise becomes the focus that client pays close attention to gradually, so the motor noise reduction becomes the development trend of motor.Present stage, diesel engine widespread usage high-pressure common rail technology, but use in this technique process; Oil rail place is easy to generate noise during engine idle, and through analyzing: when engine ignition was worked, oil sprayer made electromagnetic coil energising or outage according to the control signal of ECU; During the electromagnetic coil energising, produce the magnetic attraction needle-valve, the oil sprayer commencement of fuel injection; During outage, magnetic force disappears, and needle-valve is closed the oil sprayer oilhole under the pressure effect of spring.Because the reciprocating frequency of needle-valve is very high, the fluctuation of generation reaches oily rail, excites oily rail wall, produces oily rail noise.During engine operation, the pressure of explosion of diesel engine is big, and the acting of fuel mixture body burning expansion is constantly impacted cylinder body with certain frequency; Make cylinder body with certain frequency vibration; Easy like this cylinder body and other component of making produce resonance, produce severe noise, even the disconnected part that shakes.The measure of usually taking to the problems referred to above is to increase a decorative cover at current end face, and the decorative cover internal surface has soundproof material, has little effect but its shortcoming is a NR noise reduction.The horizontal diesel engine of certain model is owing to product structure in addition, and the noise that produces because of resonance between intake manifold and the cylinder body can't be eliminated equally.

Summary of the invention

For solving the deficiency that exists in the existing technology, the utility model provides a kind of motor car engine denoising structure that can reduce resonance generation noise between oily rail place and intake manifold and the cylinder body.

For realizing above-mentioned purpose; The motor car engine denoising structure of the utility model; Through cooperating the noise reduction of realizing motor with being connected of the cylinder cover complement that has high pressure oil rail and intake manifold parts; Described high pressure oil rail is fixed in through the high pressure oil rail installation base on the oily rail fixing lug boss of cylinder lid, and the body of this denoising structure is fastened with following sound insulation body by last sound insulation body and forms, and is provided with the cavity volume that forms because of fastening, can hold high pressure oil rail in body interior; Described denoising structure is with the high pressure oil rail inclusion in cavity volume the time, in the portion that dodges that the parts that are provided with countercylinder cap assembly under this jacket state on its body are dodged.

As the improvement to aforesaid way, described going up on the sound insulation body is fixedly connected with the arc plate, and described arc plate closely pastes the upper surface in intake manifold during by inclusion at high pressure oil rail.

As the qualification to aforesaid way, the described sleeve of going up the wire harness fixing lug boss of sound insulation body through being arranged on attachment hole and intake manifold on the arc plate is positioned on the cylinder cover complement.

Adopt technique scheme; Fastening through last sound insulation body and following sound insulation body carries out inclusion with high pressure oil rail; Make between intake manifold and the cylinder to separate through this denoising structure, generation of noise when reducing to resonate is passed through inclusion simultaneously; The noise that the high pressure oil rail place is produced effectively is isolated from the outside, and then has improved the quality of car load; Arc plate through setting up simultaneously, the noise that has reduced the intake manifold place leaks outside, and has further improved the soundproof effect of vehicle; In addition, dodge through the parts of dodging under portion's countercylinder cap assembly user mode on the structural body that the utility model relates to, make the structure of existing engine cylinder cap assembly any change not take place, its compact structure.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is done further to specify:

Fig. 1 is a sound insulation body overall structure schematic representation on the utility model;

Fig. 2 is a sound insulation body overall structure schematic representation under the utility model;

Fig. 3 is the exploded perspective view of the utility model and cylinder cover complement assembling.

Among the figure: the 1-shrinkage pool; Oily rail groove under the 2-; 3-heater plug wire harness groove; The 4-positioning hole; 5-oil sprayer oil inlet pipe assembly is dodged groove; The 6-wire harness is dodged groove; The 7-rail groove that oils; 8-arc plate; 9-sensor installation base is dodged groove; The 10-attachment hole; 11-oil rule rail brackets is dodged the hole; 12-oil inlet pipe assembly; The 13-harness guide; 14-wire harness fixing lug boss; 15-oil rule rail brackets boss; The 16-intake manifold; 17-sensor installation base; Soundproofing member under the 18-; 19-high pressure oil rail installation base; The 20-high pressure oil rail; 21-oil rail fixing lug boss; 23-cylinder lid; The last soundproofing member of 24-.

Embodiment

Motor car engine denoising structure as shown in Figure 3, that the utility model relates to is through cooperating the noise reduction of realizing motor with being connected of the cylinder cover complement that has high pressure oil rail 20 and intake manifold 16 parts; Wherein, High pressure oil rail 20 is fixed in through high pressure oil rail installation base 19 on the oily rail fixing lug boss 21 of cylinder lid 23, and in addition, this cylinder cover complement also comprises oil inlet pipe assembly 12 and harness guide 13; And the structure of the utility model; When just being based on the assembling of above-mentioned member, high pressure oil rail 24 is carried out inclusion, to realize the effect of noise reduction.Therefore, for reaching this effect, the body of this denoising structure is fastened with following sound insulation body 18 by last sound insulation body 24 and forms, and is provided with the cavity volume that forms because of fastening, can hold high pressure oil rail 20 in body interior; Simultaneously; In order to ensure the linkage structure that does not change existing cylinder cover complement; And when guaranteeing the utility model to high pressure oil rail 24 inclusions, its body and cylinder cover complement do not interfere, and are being provided with the portion that dodges that the related parts of countercylinder cap assembly are dodged under this inclusion state on its body; And as when cooperation is installed, the parts that can interfere with the utility model mainly contain sensor installation base 17 and wire harness fixing lug boss 14 and oil rule rail brackets boss 15 on the oily rail fixing lug boss 21 of cylinder lid 23, hot plug wire harness, oil inlet pipe assembly 12, harness guide 13, the intake manifold 16.For realizing dodging and, describing in detail as follows in the face of the structure of the utility model down to above-mentioned parts to the inclusion of high pressure oil rail 24:

By shown in Figure 1; In conjunction with Fig. 3; Last sound insulation body 24 is provided with the rail groove 7 that oils along last sound insulation body 24 length direction settings; The rail groove 7 that oils has constituted a part of high pressure oil rail 24 being carried out the cavity volume of jacket, on last sound insulation body 24, is provided with five oil sprayer oil inlet pipe assemblies that oil inlet pipe assembly 12 is dodged that are parallel to each other and dodges groove 5.On last sound insulation body 24, be fixed with arc plate 8; The bottom of arc plate 8 has the radian that can fit with the upper surface of intake manifold 16; The sensor installation base that the recessed formation in center is dodged sensor installation base 17 is dodged groove 9; On the both sides of arc plate 8, be provided with two attachment holes 10, be sleeved on through these two attachment holes 10 on two wire harness fixing lug boss 14 of intake manifold 16 and realize the location positioning of sound insulation body 24 on cylinder cover complement.On arc plate 8, also be provided with the oil rule rail brackets that is used for dodging oil rule rail brackets boss 15 and dodge hole 11.

By shown in Figure 2; In conjunction with Fig. 3, following sound insulation body 18 sages are provided with the edge following oily rail groove 2 of sound insulation body 18 length directions setting down, and following oily rail groove 2 has constituted the another part that high pressure oil rail 24 is carried out the cavity volume of jacket; When it fastens with the rail groove 7 that oils; Form the cavity volume that the main body of high pressure oil rail 24 is carried out jacket, wherein, be provided with the shrinkage pool 1 that two vertical directions of oily rail groove 2 down are provided with in the oily rail groove 2 down; This shrinkage pool 1 has also constituted the part of jacket high pressure oil rail 24, and it has realized the jacket to oily rail fixing lug boss 21; On the body of following sound insulation body 18, be provided with two positioning holes 4,, will descend sound insulation body 18 installing and locating on cylinder lid 23 through this positioning hole 4; Bottom at following sound insulation body 18 is provided with the heater plug wire harness groove 3 that is used for wrapping up the heater plug wire harness.

When motor assembles; At first intake manifold 16 and high pressure oil rail 20 are installed on the cylinder lid 23; To descend high pressure oil rail 23 bottoms of sound insulation body 18 spiral-locks between intake manifold 16 and cylinder lid 23 again; Lid is gone up sound insulation body 24 down from the top then, sound insulation body 24 is fastened with following sound insulation body 18 get final product.Its above structure designs according to the shape in space between the formal structure of cylinder cover complement and the adjacent zeros parts fully, under the prerequisite that does not influence the wire harness trend, plays sound-absorbing effect.

Claims

1. motor car engine denoising structure; Through cooperating the noise reduction of realizing motor with being connected of the cylinder cover complement that has high pressure oil rail (20) and intake manifold (16) parts; Described high pressure oil rail (20) is fixed on the oily rail fixing lug boss (21) of cylinder lid (23) through high pressure oil rail installation base (19); It is characterized in that: the body of this denoising structure is fastened by last sound insulation body (24) and following sound insulation body (18) and forms, body interior be provided with form because of fastening, can hold the cavity volume of high pressure oil rail (20); Described denoising structure is with high pressure oil rail (20) inclusion in cavity volume the time, in the portion that dodges that the parts that are provided with countercylinder cap assembly under this inclusion state on its body are dodged.

2. motor car engine denoising structure according to claim 1; It is characterized in that: described going up on the sound insulation body (24) is fixedly connected with arc plate (8), and described arc plate (8) closely pastes the upper surface in intake manifold (16) during by inclusion at high pressure oil rail (20).

3. motor car engine denoising structure according to claim 2 is characterized in that: the described sound insulation body (24) of going up is positioned on the cylinder cover complement through the sleeve that is arranged on attachment hole (10) and the wire harness fixing lug boss (14) of intake manifold (16) on the arc plate (8).