CN204783210U - Two scroll exhaust manifold - Google Patents

Abstract

The utility model provides a two scroll exhaust manifold, each cylinder order of ignition of the engine that is suitable for is 1 -3 -2 -4, and exhaust manifold is including admitting air flange, air flue and the flange of giving vent to anger, and the flange that admits air is equipped with the inlet port with each jar of engine and each air flue intercommunication of exhaust manifold respectively, first, second, third, fourth that the air flue includes series arrangement be totally four air flues, and first, second air flue merges into left runner, and third, fourth air flue merge into right runner, form the double fluid and say that the baffle is cut apart with right runner setting to left runner, the flange of giving vent to anger is equipped with two and says with the double fluid and the blue venthole that communicates of booster whirlpool hold -carrying that the flange reason is equipped with the fastener connecting hole. This structure can avoid appearing air flue staggered arrangement's the condition to improve the booster performance, and make the manifold shape simple relatively, arrange comparatively nimble, the casting of being convenient for.

Description

A kind of two scroll gas exhaust manifold

Technical field

The utility model belongs to automotive engine component, is specifically related to the gas exhaust manifold design of supercharged engine.

Background technique

There is overlapping angle in each cylinder exhaust of current in-line four cylinder internal combustion engine, causes the air-flow between each air flue of manifold to interfere with each other, and makes engine exhaust not smooth, hydraulic performance decline.So in order to avoid this problem, enmgine exhaust is standing counts two scroll pattern, during to guarantee any cylinder exhaust, mutually can not disturb with last cylinder exhaust.As depicted in figs. 1 and 2, because each cylinder ignition order of motor is 1-3-4-2, gas exhaust manifold (2) air flue that each cylinder (1) connects also is inflated with same sequence; Stagger 1-3,3-4,4-2,2-1 air flue inflationtime, and this pair of scroll gas exhaust manifold (2) must be arranged as structure shown in Fig. 1: namely the 1st, the 4th air flue converges, the structure that the 2nd, the 3rd air flue converges.When motor 1 cylinder starts to be vented, can not disturb with 2 on adjacent ignition order, 3 cylinders; When motor 3 cylinder starts to be vented, can not disturb with 1 on adjacent ignition order, 4 cylinders; When motor 4 cylinder starts to be vented, can not disturb with 3 on adjacent ignition order, 2 cylinders; When motor 2 cylinder starts to be vented, can not disturb with 4 on adjacent ignition order, 1 cylinder.

But this structural configuration, four air flues are staggered, and sectional shape differs greatly, and cause four cylinder exhaust conformity poor.Simultaneously because cabin space is limited, staggered upper airway flow dynamic resistance is comparatively large, and form higher back pressure to cylinder exhaust, the cylinder residual waste gas quantity causing this air flue to connect, higher than other cylinders, affects overall engine performance.In addition, this gas exhaust manifold easily forms eddy current at each air flue concourse, causes pressurized machine (3) the charge air flow irregularity in its downstream, reduces pressurized machine (3) aeroperformance.And be staggered due to length air flue, difficult arrangement, complex structure, casting difficulty.

Summary of the invention

For prior art Problems existing, the utility model provides a kind of novel two scroll exhausts, avoids occurring the staggered situation of air flue, thus improves booster performance, and make manifold shapes relatively simple, arrange comparatively flexible, be convenient to casting.

The technical solution of the utility model is as follows:

The utility model the motor 1-3-4-2 ignition order of routine is revised as 1-3-2-4 order basis on and realize.Described gas exhaust manifold comprises inlet flange, air flue and flange of giving vent to anger.Described inlet flange is respectively equipped with the inlet hole that cylinder each with motor and each air flue of gas exhaust manifold are communicated with; Described air flue comprises tactic first, second, third, fourth totally four air flues, and first, second air flue is merged into left runner, and the 3rd, the 4th air flue is merged into right runner, and form double flow channel, left runner and right runner arrange segmentation baffle plate; Described flange of giving vent to anger is provided with two air outlet holes be communicated with double flow channel and pressurized machine whirlpool end flange, and flange periphery is provided with fastening piece attachment hole.

The air outlet hole that described two of giving vent to anger on flange are communicated with double flow channel and pressurized machine whirlpool end flange is that left and right is arranged side by side, and shape is all similar to the semicircle of band chamfering, and is symmetric.

Described inlet flange is made up of four little flanges, and each little flange is provided with fastening piece attachment hole, is rigidly connected respectively with cylinder cover sealing gasket and cylinder cap by fastening piece, and each little flange is equipped with an inlet hole be communicated with each cylinder of motor and each air flue of gas exhaust manifold.

Of the present utility model pair of scroll gas exhaust manifold, adopts first, second air flue to converge, the structure that the 3rd, the 4th air flue converges.Each air flue is without the need to being staggered, sectional shape can be made to keep identical, four cylinder exhaust air flow are consistent, through CFD and FEA simulation analysis, compared to traditional two scroll gas exhaust manifolds, each cylinder exhaust back pressure conformity is better, the ventilation of four cylinders is consistent, in cylinder, residual waste gas quantity is consistent, and each cylinder working condition is also more consistent, can play the overall performance of motor more fully.Easily eliminate the vortex phenomenon of air flue concourse simultaneously, make the air-flow entering downstream charge device whirlpool end more smooth-going, thus improve booster performance.And this kind of gas exhaust manifold maintains the layout that adjacent two air flues converge, and there will not be the staggered situation of air flue, manifold shapes is relatively simple, arranges comparatively flexible, is convenient to casting.

Accompanying drawing explanation

Fig. 1 is the working principle schematic diagram of background technique

Fig. 2 is the structural representation of background technique

Fig. 3 is working principle schematic diagram of the present utility model

Fig. 4 is front view of the present utility model

Fig. 5 is isometric views of the present utility model

In figure, two scroll gas exhaust manifolds of 1-cylinder, 2-background technique, 3-pressurized machine, 4-of the present utility model pair of scroll gas exhaust manifold, 5-inlet flange, 51-inlet hole, 52-inlet flange mounting hole, 6-air flue, 61-first air flue, 62-second air flue, 63-the 3rd air flue, 64-the 4th air flue, 7-double flow channel, the left runner of 71-, the right runner of 72-, 8-split baffle plate, 9-gives vent to anger flange, 91-gives vent to anger flange mounting hole, 10-stiffening rib, 101-stiffening rib 1,102-stiffening rib 2,103-stiffening rib 3.

Embodiment

Structure of the present utility model and working method is further illustrated below in conjunction with accompanying drawing:

See Fig. 3, the utility model the motor that is suitable for, its ignition order should be 1-3-2-4, to keep the inflation sequence of each air flue of gas exhaust manifold for 1-3-2-4.

See Fig. 4 and Fig. 5, double flow channel gas exhaust manifold material of the present utility model is cast iron, and its structure is made up of inlet flange (5), air flue (6), double flow channel (7), segmentation baffle plate (8), flange of giving vent to anger (9) and stiffening rib (10).Inlet flange (5) forms an angle with flange (9) shape of giving vent to anger, and plays certain load-bearing effect to pressurized machine.

Described inlet flange (5) is divided into four independently little flanges, shape approximation is in the rhombus of band chamfering, and all there is an inlet hole (51) its central position, and each little flange is provided with two through holes, for inlet flange mounting hole (52), be rigidly connected by stud and engine cylinder cover.

Described air flue (6) forms the air-flow path of gas exhaust manifold jointly by four trajectories and all different tactic first air flue (61) of length, the second air flue (62), the 3rd air flue (63) and the 4th air flue (64), its structure is asymmetric arrangement, is conducive to gas flow uniformity.

Described first air flue (61) and the second air flue (62) are merged into left runner (71), the right runner (72) that 3rd air flue (63) and the 4th air flue (64) are merged into, form double flow channel (7), left runner (71) is all similar to the runner mouth-shaped of right runner (72) semicircle being with chamfering, and be symmetric, avoid the gas blowby between engine exhaust.

Described segmentation baffle plate (8), for being positioned at the straight line type dividing plate between left runner (71) and right runner (72), for splitting runner, forms double flow channel structure.

Described flange of giving vent to anger (9) is irregular flange shape, and it is provided with four through holes, is flange mounting hole of giving vent to anger (91), is rigidly connected by bolt and pressurized machine whirlpool end (3).The runner mouth of double flow channel (7) is also positioned on flange of giving vent to anger (9).

Between the first air flue (61) and the second air flue (62), between the second air flue (62) and the 3rd air flue (63), between the 3rd air flue (63) and the 4th air flue (64), all there is the region of filling planar, for stiffening rib (10), be respectively stiffening rib 1(101), stiffening rib 2(102) and stiffening rib 3(103).Its effect is rigidity and the mode of strengthening gas exhaust manifold, and the stress reducing gas exhaust manifold temperature distortion generation is concentrated, and prevents exhaust manifold air passage (6) joint from ftractureing and distortion.

Working principle of the present utility model is: in engine operation process, each cylinder waste gas circulation back and forth enters each air flue, wherein the first air flue and the second air flue merge, waste gas flows into pressurized machine whirlpool end through the left runner of double flow channel, 3rd air flue and the 4th air flue merge, waste gas flows into pressurized machine whirlpool end through the right runner of double flow channel, with after through ternary catalyzing unit, silencing apparatus, finally discharge from muffler tail pipe.

Claims (6)

1. a two scroll gas exhaust manifold, each cylinder spark order of motor of being suitable for be 1-3-2-4, described gas exhaust manifold comprises inlet flange, air flue and flange of giving vent to anger; It is characterized in that: described inlet flange is respectively equipped with the inlet hole that cylinder each with motor and each air flue of gas exhaust manifold are communicated with; Described air flue comprises tactic first, second, third, fourth totally four air flues, and first, second air flue is merged into left runner, and the 3rd, the 4th air flue is merged into right runner, and form double flow channel, left runner and right runner arrange segmentation baffle plate; Described flange of giving vent to anger is provided with two air outlet holes be communicated with double flow channel and pressurized machine whirlpool end flange, and flange periphery is provided with fastening piece attachment hole.

2. according to claim 1 pair of scroll gas exhaust manifold, it is characterized in that: described in two air outlet holes be communicated with double flow channel and pressurized machine whirlpool end flange of giving vent to anger on flange be that left and right is arranged side by side, shape is all similar to the semicircle of band chamfering, and is symmetric.

3. according to claim 1 and 2 pair of scroll gas exhaust manifold, it is characterized in that: described inlet flange is made up of four little flanges, each little flange is provided with fastening piece attachment hole, be rigidly connected by fastening piece with cylinder cover sealing gasket and cylinder cap respectively, each little flange is equipped with an inlet hole be communicated with each cylinder of motor and each air flue of gas exhaust manifold.

4. according to claim 3 pair of scroll gas exhaust manifold, is characterized in that: the fill area having planar between adjacent two air flues, forms stiffening rib.

5. according to claim 3 pair of scroll gas exhaust manifold, is characterized in that: described inlet flange (5) forms angle with flange (9) of giving vent to anger and arranges.

6. according to claim 3 pair of scroll gas exhaust manifold, is characterized in that: four of described inlet flange (5) independently little flange shape be similar to the rhombus of band chamfering.