CN214145724U - Intake manifold integrating EGR (exhaust gas Recirculation) intake duct on cylinder cover connecting flange - Google Patents

Abstract

An air intake manifold integrating an EGR air inlet passage on a cylinder cover connecting flange belongs to the technical field of automobile air intake manifolds and overcomes the problems that the prior art arranges the EGR air inlet passage outside the cylinder cover connecting flange and an EGR auxiliary cavity has a two-layer structure, thereby causing longer air flow path and influencing the air inlet uniformity of each air passage, and is characterized in that the center position of the cylinder cover connecting flange is provided with the EGR air inlet passage extending inwards, the inner wall of the EGR air inlet passage is provided with a communication hole for realizing the communication between the EGR auxiliary cavity and the EGR air inlet passage, the cylinder cover connecting flange is respectively provided with a first air inlet hole, a second air inlet hole, a third air inlet hole and a fourth air inlet hole for realizing the communication between the EGR auxiliary cavity and the air passage of an air intake branch pipe, the air intake manifold has the advantages of simple structure, effectively solves the problem that the EGR air inlet passage occupies the space position of the manifold, and only has a layer of EGR auxiliary cavity structure, thereby shortening the flow path of EGR gas, the intake uniformity of the manifold is effectively improved.

Description

Intake manifold integrating EGR (exhaust gas Recirculation) intake duct on cylinder cover connecting flange

Technical Field

The utility model belongs to the technical field of car air intake manifold, in particular to air intake manifold with EGR intake duct integration at cylinder cap flange.

Background

In the prior art, high-pressure EGR gas is generally guided to a connecting flange of a throttle valve of an intake manifold by an automobile engine, the EGR gas and air are mixed and then enter a pressure stabilizing cavity to be redistributed to gas passages of cylinders, a certain space position is required to be occupied by the structure because an EGR pipe and the intake manifold are required to be connected through a flange, a section which is long enough is required to be arranged before the pressure stabilizing cavity after the flange of the throttle valve of the intake manifold, the EGR gas inlet consistency of the structure completely depends on the design of the gas passages of the manifold, and in addition, if the distance from the flange of the throttle valve to the pressure stabilizing cavity is too short, the gas passages closest to a guide opening are probably caused to enter the largest EGR gas flow, so that the combustion consistency of the cylinders is influenced.

In order to solve the above problems, the utility model with application number CN201721794969.6 discloses "an air intake manifold structure of three-cylinder engine with EGR auxiliary chamber", which comprises a manifold cylinder cover flange and an EGR auxiliary chamber installed on the manifold cylinder cover flange, although the utility model solves the problem that a flange structure connected through a flange between an EGR pipe and an air intake manifold needs to occupy a certain space position, however, as can be seen from fig. 1 and 2 of the attached drawings of the specification, the utility model arranges an EGR inlet channel outside the cylinder cover connecting flange at the middle position of the air intake manifold, and needs to configure an EGR valve body mounting flange structure at the position of the EGR inlet channel, during the specific implementation, the EGR valve body is directly installed on the EGR mounting flange, and also occupies a certain space position, thereby affecting the overall layout of the engine; in addition, the EGR auxiliary cavity of the utility model comprises a first EGR auxiliary cavity sheet and a second EGR auxiliary cavity sheet; the first EGR auxiliary cavity piece encloses and blocks the second EGR auxiliary cavity piece to form a first air guide channel communicated with the EGR air inlet channel; a first air guide port and a second air guide port which are communicated with the first air guide channel are respectively formed in the second EGR auxiliary cavity piece; the vice chamber piece of second EGR encloses and keeps off manifold cylinder cap flange and forms the second that leads the gas port intercommunication respectively with first and lead the gas channel and lead the third that the gas port communicates with the second and lead the gas channel, consequently, this utility model the vice chamber of EGR contains two-layer structure, and the structure is complicated, causes gas flow path longer, can influence the homogeneity that admits air of each gas channel to influence the uniformity of each jar burning.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that overcome prior art's weak point, provide one kind and both can improve each air flue homogeneity of admitting air to guarantee each jar combustion uniformity, can realize simple structure again, do not occupy the manifold layout space one kind with the EGR intake duct integrated intake manifold at the cylinder flange.

The utility model discloses a technical scheme include the stabilivolt, be equipped with air throttle flange in the right side upper end of stabilivolt, be equipped with cylinder cap flange at the lower extreme of stabilivolt, be provided with the air flue of the air intake branch pipe of 4 steady voltage chamber intercommunications with the stabilivolt on the flange face of the lower extreme cylinder cap flange of stabilivolt side by side the interval, be first air flue, second air flue, third air flue and fourth air flue respectively from left to right cylinder cap flange's upper end is equipped with the vice chamber of EGR, is equipped with the EGR intake duct that extends to the interior in cylinder cap flange's central point, and the axis of EGR intake duct is alpha with horizontal line's contained angle, is equipped with the intercommunicating pore that is used for realizing the vice chamber of EGR and EGR intake duct intercommunication at the inner wall of EGR intake duct, is equipped with first inlet port, second inlet port, the air inlet that is used for realizing the air flue intercommunication of the vice chamber of EGR and 4 air intake branch pipes on cylinder cap flange respectively, A third air inlet hole and a fourth air inlet hole.

And the included angle alpha between the axis of the EGR air inlet channel and the horizontal line is 5-20 degrees.

The first air inlet is formed in the air channel wall of the first air channel and is communicated with the EGR auxiliary cavity; the fourth air inlet is formed in the air channel wall of the fourth air channel and is communicated with the EGR auxiliary cavity; the second inlet port is established on the flange face of cylinder cap flange between second air flue and third air flue, left end and second air flue intercommunication, right-hand member and EGR intake duct intercommunication, the third inlet port is established on the flange face of cylinder cap flange between second air flue and third air flue, and left end and EGR intake duct intercommunication, right-hand member and third air flue intercommunication.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the EGR inlet channel is integrated in the cylinder cover connecting flange, so that the problem that the EGR inlet channel occupies the space position of the manifold is effectively solved, and the overall layout of the engine is more compact;

(2) the utility model discloses simple structure, EGR intake duct is through establishing second inlet port and third inlet port and second air flue and the direct intercommunication of third air flue on the cylinder cap flange face, and the EGR intake duct only has shortened the gaseous flow path of EGR through the vice cavate of one deck EGR and first air flue and fourth air flue and intercommunication, the effectual manifold air intake homogeneity that has improved.

Drawings

Figure 1 is a front view of the present invention,

figure 2 is a front view of the utility model hidden EGR subchamber baffle,

figure 3 is a bottom view of the present invention,

figure 4 is an enlarged cross-sectional view a-a of figure 3,

figure 5 is the utility model discloses hide the perspective of vice chamber baffle of EGR.

In the figure;

1. a voltage-stabilizing tube is arranged in the shell,

2. a throttle valve is connected with a flange, and the throttle valve is connected with a flange,

3. the cylinder cover is connected with a flange,

4, an EGR auxiliary cavity baffle plate,

5, the EGR auxiliary cavity is arranged in the EGR auxiliary cavity,

6. a communication hole is formed in the outer wall of the housing,

7-1. a first air passage,

7-2. a second air passage,

7-3. a third air passage,

7-4. a fourth air passage,

an EGR inlet channel 8, wherein the EGR inlet channel is connected with the EGR inlet channel,

9-1, a first air inlet hole,

9-2. a second air inlet hole,

9-3, a third air inlet hole,

9-4, a fourth air inlet hole.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in the attached drawing, the technical proposal adopted by the utility model comprises a pressure stabilizing tube 1, a pressure stabilizing cavity is arranged inside the pressure stabilizing tube 1, a throttle connecting flange 2 is arranged at the upper end of the right side of the pressure stabilizing tube 1, a cylinder cover connecting flange 3 is arranged at the lower end of the pressure stabilizing tube 1, 4 air passages of air inlet branch pipes communicated with the pressure stabilizing cavity are arranged on the flange surface of the cylinder cover connecting flange 3 at the lower end of the pressure stabilizing tube 1 side by side at intervals, a first air passage 7-1, a second air passage 7-2, a third air passage 7-3 and a fourth air passage 7-4 are respectively arranged from left to right, an EGR auxiliary cavity 5 is arranged at the upper end of the cylinder cover connecting flange 3, an EGR air inlet channel 8 extending inwards is arranged at the central position of the cylinder cover connecting flange 3, the included angle alpha of the axis of the EGR 8 and the horizontal line is 15-20 degrees, a communicating hole 6 for realizing the communication between the EGR auxiliary cavity 5 and the EGR air inlet channel 8 is arranged on the inner wall of the EGR air inlet channel 8, a cylinder cover connecting flange 3 is respectively provided with a first air inlet 9-, a second air inlet 9-2, a third air inlet 9-3 and a fourth air inlet 9-4 which are used for realizing the communication between the EGR auxiliary cavity 5 and the air passages of 4 air inlet branch pipes, and more specifically, the first air inlet 9-1 is arranged on the air passage wall of the first air passage 7-1 and is communicated with the EGR auxiliary cavity 5; the fourth air inlet 9-4 is arranged on the air passage wall of the fourth air passage 7-4 and is communicated with the EGR auxiliary cavity 5; the second air inlet 9-2 is arranged on the flange face of the cylinder cover connecting flange 3 between the second air passage 7-2 and the third air passage 7-3, the left end of the second air inlet is communicated with the second air passage 7-2, the right end of the second air inlet is communicated with the EGR inlet channel 8, the third air inlet 9-3 is arranged on the flange face of the cylinder cover connecting flange 3 between the second air passage 7-2 and the third air passage 7-3, the left end of the third air inlet is communicated with the EGR inlet channel 8, the right end of the third air inlet is communicated with the third air passage 7-3, and an EGR auxiliary cavity baffle 4 is arranged in front of the EGR auxiliary cavity 5.

When the EGR gas-liquid separator works, EGR gas enters from an EGR gas inlet passage 8, wherein a part of the EGR gas directly enters a second gas passage 7-2 and a third gas passage 7-3 through a second gas inlet hole 9-2 and a third gas inlet hole 9-3 on the flange surface of a cylinder cover connecting flange 3, the other part of the EGR gas enters an EGR auxiliary cavity 5 through a communication hole 6, the gas entering the EGR auxiliary cavity 5 enters a first gas passage 7-and a fourth gas passage 7-4 through a first gas inlet hole 9-and a fourth gas inlet hole 9-4, and the EGR gas entering the first gas passage 7-, the second gas passage 7-2, the third gas passage 7-3 and the fourth gas passage 7-4 is mixed with air in the gas passages and enters a cylinder for combustion.

Claims (3)

1. An intake manifold integrating an EGR (exhaust gas recirculation) intake passage on a cylinder cover connecting flange comprises a pressure stabilizing pipe (1), a throttle valve connecting flange (2) is arranged at the upper end of the right side of the pressure stabilizing pipe (1), a cylinder cover connecting flange (3) is arranged at the lower end of the pressure stabilizing pipe (1), 4 air passages of an intake branch pipe communicated with a pressure stabilizing cavity of the pressure stabilizing pipe (1) are arranged on the flange surface of the cylinder cover connecting flange (3) at the lower end of the pressure stabilizing pipe (1) side by side at intervals, a first air passage (7-1), a second air passage (7-2), a third air passage (7-3) and a fourth air passage (7-4) are respectively arranged from left to right, the intake manifold is characterized in that an EGR auxiliary cavity (5) is arranged at the upper end of the cylinder cover connecting flange (3), an EGR intake passage (8) extending inwards is arranged at the central position of the cylinder cover connecting flange (3), and the axis of the EGR intake passage (8) and the horizontal line are alpha, the inner wall of the EGR inlet channel (8) is provided with a communicating hole (6) for communicating the EGR auxiliary cavity (5) with the EGR inlet channel (8), and the cylinder cover connecting flange (3) is respectively provided with a first air inlet hole (9-1), a second air inlet hole (9-2), a third air inlet hole (9-3) and a fourth air inlet hole (9-4) for communicating the EGR auxiliary cavity (5) with air passages of 4 air inlet branch pipes.

2. The intake manifold for integrating an EGR inlet channel into a cylinder head connecting flange according to claim 1, characterized in that the angle α between the axis of the EGR inlet channel (8) and the horizontal is 15 ° to 20 °.

3. An intake manifold integrating an EGR inlet duct into a cylinder head flange according to claim 1 or 2, characterized in that the first inlet holes (9-1) are provided in the duct wall of the first air duct (17 ") and communicate with the EGR secondary chamber (5); the fourth air inlet hole (9-4) is formed in the air passage wall of the fourth air passage (7-4) and is communicated with the EGR auxiliary cavity (5); the second air inlet hole (9-2) is arranged on the flange face of the cylinder cover connecting flange (3) between the second air passage (7-2) and the third air passage (7-3), the left end is communicated with the second air passage (7-2), the right end is communicated with the EGR air inlet channel (8), the third air inlet hole (9-3) is arranged on the flange face of the cylinder cover connecting flange (3) between the second air passage (7-2) and the third air passage (7-3), the left end is communicated with the EGR air inlet channel (8), and the right end is communicated with the third air passage (7-3).

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