DE102007032442A1 - Inlet manifold system for supplying combustion air for cylinders of multi-cylinder internal combustion engine e.g. diesel engine, has swivel flaps supported at individual swivel bearings that are independent of each other - Google Patents

Abstract

The inlet manifold system (1) has multiple swivel flaps (10) arranged in respective inlet manifold devices (3) for regulating the inflow combustion air. Each inlet manifold device exhibits two individual inlet manifolds (4, 5) that are closed or opened by the respective swivel flap, where the swivel flaps are supported at individual swivel bearings (11) that are independent of each other. Each swivel flap is arranged in an intersection region between a common single-flow inlet port (7) per cylinder and the two individual inlet manifolds.

Description

Technical area

The The invention relates to an intake manifold for a multi-cylinder internal combustion engine according to the preamble of claim 1.

State of the art

In the DE 42 28 334 A1 Such an intake manifold is described via which the cylinders of an internal combustion engine combustion air is supplied. The intake manifold includes in a housing one of the number of cylinders corresponding number of individual intake, each individual intake is associated with a pivoting flap which is to be adjusted between the cross-section of the suction tube closing position and a releasing position. The intake manifold is designed for an internal combustion engine having two parallel cylinder banks, wherein the suction pipes of a cylinder bank are to be closed by pivoting flaps, which are held on a common, continuous actuating shaft and to be adjusted by this between the closed position and the open position. In this way, a kinematic bond between the pivoting flap positions is achieved in the suction tubes, each associated with a cylinder bank. An additional degree of freedom in setting different pivot flap positions is with regard to the control shafts for different cylinder banks. In addition, however, no other settings are provided.

Disclosure of the invention

Of the Invention is based on the object with simple constructive activities an intake manifold for an internal combustion engine with additional settings for the form different load and operating conditions of the internal combustion engine. This should preferably be in consideration of aerodynamic conditions done in the intake manifold.

These Task is according to the invention with the Characteristics of claim 1 solved. The dependent claims give expedient further education at.

The inventive intake manifold has Suction tube devices for each cylinder of the internal combustion engine, each two individual intake include, which open into the cylinder inlet of each cylinder. in each one of the individual intake of a suction pipe device is located a swing flap, over to close the cross section of this individual intake to open is. The swirl flaps are independent of each single pivot bearings in the case the intake manifold system stored.

The Single bearing has the advantage that the pivoting movements the pivoting flaps in principle Kinematically decoupled from each other, so that each pivoting flap independently can be operated by the adjacent pivoting flaps. hereby are opposite conventional, known from the prior art intake manifolds additional light Degrees of freedom with regard to the adjustment of the pivoting flaps given, allowing an individual adjustment of each individual pivoting flap in the intake manifold of a cylinder is possible.

It can in a further embodiment but also be appropriate Although the hinged flaps store individually, but by a common actuator actuate to let the particular on the pivot axes of each pivot bearing attacks. In this way it is possible with a reduced number of actuators - if necessary with only one actuator - one To operate a plurality of pivoting flaps, due to the single bearing additional constructive possibilities are given by, for example, in the suction pipes, the different Assigned to cylinders, different pivoting flaps or different Swing flap positions are provided. Alternatively, it is but of course possible, each pivoting flap or a small group of pivoting flaps each assign an actuator to an independent adjustment to realize.

According to one preferred development are the pivoting flaps in the branching area between a single-flow intake port per cylinder and the two of this Intake passage branching individual intake pipes arranged. The individual intake pipes are separated from each other in particular by a partition, which is introduced into the intake passage. At the front of this partition Expediently the pivoting flaps are arranged. This can be done in such a way that the pivotal mounting either directly on the partition wall or on the inner wall of the suction tube or the intake duct takes place. In any case, it has proven to be expedient store the hinged flaps in such a way that their pivot axes are vertical to the longitudinal axis stand of the suction tube, so that the pivot axes protrude from the flow path and at a position outside of the flow path operated by the actuator in the intake manifold can be.

According to further advantageous embodiments, the pivoting flaps are either mounted approximately centrally, ie with a respective distance to their end faces, or stored in the region of an end face. The central storage has the advantage that even small swivel angle suffice to adjust the pivoting flap between closed and open position. On the other hand, the end-face mounting has the advantage that the individual pivot bearing of each pivoting flap can be arranged directly on the inner wall of the suction pipe or directly on the end face of the partition wall between the two individual suction pipes.

According to advantageous execution is in each intake manifold per cylinder only one pivoting flap provided, which is the cross section of one of the two individual intake adjusted. in principle but it is also possible position the pivoting flap in such a way that the cross section both intake pipes in one operation the swing flap is changed, in particular, an embodiment in the way is advantageous that initially the cross section only one Single intake pipe is adjusted between closing and opening position and only at the complete close the cross section of the first Einzelsaugrohres also the cross section of second Einzelsaugrohres is reduced. This can be particularly advantageous at a positioning of the single pivot bearing of the pivoting flap the inner wall of the intake duct immediately upstream of the branch to realize the two individual intake, and that at the front Storage of the swing flap. About that In addition, it is also conceivable in both individual intake respectively to provide a pivoting flap and the position of these pivoting flaps either kinematically to couple or kinematic independently design.

Brief description of the drawings

Further Advantages and expedient designs are the further claims, the figure description and the drawings. Show it:

1 3 is a perspective view of an intake manifold for a multi-cylinder internal combustion engine, shown with four intake manifolds, each comprising two individual intake manifolds,

2 a section through two Saugrohreinrichtungen, each shown in the transition from the single-suction intake duct to the two individual suction pipes, wherein in the branching region to the individual intake manifolds in each case a pivoting flap is rotatably mounted,

3 a section through an intake manifold in a further embodiment, in which the pivoting flap mounted frontally and the pivot bearing is positioned on the inner wall of the intake duct,

4 a Saugrohranlage in yet another embodiment in which the pivoting flap is also mounted on the inner wall of the intake passage, but approximately in the middle of the pivoting flap.

Embodiment (s) the invention

In The figures are the same components with the same reference numerals.

In the 1 shown intake manifold 1 is part of an internal combustion engine - a gasoline engine or a diesel engine - and is used to supply combustion air for the cylinders of the internal combustion engine. The intake manifold 1 has in a suitably made of plastic injection molding intake manifold 2 a plurality of intake manifolds arranged in parallel 3 on, each suction tube device 3 associated with a cylinder of the internal combustion engine. About each of the intake manifolds 3 The combustion air, which is sucked from the environment, the cylinders of the internal combustion engine is supplied.

Each suction tube device 3 exists, like 1 combined with 2 to be taken from a suction channel 7 , which is formed einflutig, and two individual intake 4 and 5 extending in the direction of flow directly to the intake passage 7 connect. In an expedient embodiment, the individual intake 4 and 5 Part of the intake duct 7 but against each other via a partition 6 separated, the center of the intake 7 is introduced. The intake channel 7 lies upstream of the individual intake pipes 4 and 5 ; over the intake channel 7 becomes in the direction of the arrow 8th the combustion air introduced, the further course according to the arrow 9 into the opened individual intake manifold 4 is introduced, via which the combustion air is finally supplied to the cylinders.

In the branching area of the intake duct 7 to the two individual intake manifolds 4 and 5 there is a swing flap each 10 , which is about a single pivot bearing 11 to pivot, which is on the front side of the partition 6 between the individual intake manifolds 4 and 5 located. In 2 is the swing flap 10 shown in its closed position, in which the flow path from the intake passage 7 into the individual intake manifold 5 is locked in, so that the entire, brought-up combustion air is forced, the way according to the arrow 9 into the other individual intake manifold 4 to take. The swing flap 10 extends obliquely between the side wall of the intake passage and the end face of the partition wall 6 , wherein the inclined surface of the pivoting flap 10 flow view points a streamlined Flä che forms the ge entire air flow in the open cross-section of the Einzelsaugrohres 4 passes.

From the illustrated closed position is the pivoting flap 10 in the direction of the arrow 12 to steer in an opening position in which the pivoting flap 10 approximately in the middle of the intake duct 7 is aligned and parallel to the side walls of the intake passage. In this central position, the cross section is in the individual intake manifold 5 in and also in the parallel, other individual intake manifold 4 opened, so that the supplied combustion air evenly into both individual intake 4 and 5 is introduced.

The pivot axis in the single pivot bearing 11 is perpendicular to the longitudinal axis of the intake passage or the Einzelsaugrohre 4 and 5 which is at the same time the main flow direction of the supplied combustion air. The actuation by means of an actuator takes place outside the intake duct 7 or the individual intake 4 and 5 where either each pivoting flap 10 in each case one actuator is assigned or several pivoting flaps are to be actuated jointly by an actuator.

In 3 another embodiment is shown. The basic mode of operation corresponds to that of the previous exemplary embodiment, so that only the differences will be explained below. The single pivot bearing 11 the swing flap 10 is directly on the side wall 14 of the intake duct 7 stored and takes in the Schließpositi on, in which the inflow cross section in the Einzelsaugrohr 5 is closed in, an oblique position between the side wall 14 and the front of the partition 6 one. For conversion into the opening position, the pivoting flap 10 around the axis of the single pivot bearing 11 according to the arrow 12 pivoted so that the pivoting flap 10 with one side directly to the side wall 14 as in the right half of 3 is shown. In this opening position of the swing flap 10 is the flow cross section in the individual intake manifold 5 released in, so that the direction of arrow 8th brought combustion air from the intake 7 in the same way according to arrows 9 and 13 in the individual intake 4 respectively. 5 is directed. The axis of the single pivot bearing 11 runs as in the previous embodiment perpendicular to the longitudinal axis of the channel or the Einzelsaugrohre.

Optionally, the inflow to the Einzelsaugrohr 4 from the swing flap 10 closed or reduced. In this case, the swing flap 10 opposite to the arrow direction 12 pivoted, so that the free end face of the pivoting flap in the flow cross-section of the Einzelsaugrohres 4 succeeded and if necessary completely shut off this.

In 4 Yet another embodiment is shown in which the pivoting flap 10 at a distance from the side wall 14 in the intake channel 7 ge is superimposed, wherein the single pivot bearing 11 the swing flap 10 on the inner wall side of the intake duct pointing backwards in the direction of view 7 is stored. The axis of the single pivot bearing 11 runs as in the previous embodiments perpendicular to the main flow direction or to the longitudinal axis of the channel and the Einzelsaugrohre. Due to the distance to both side walls of the intake duct 7 is the swing flap 10 in the open position (right half in 4 ) parallel and at a distance from the side wall 14 the intake duct, so that the combustion air on both sides of the pivoting flap 10 flows past and in the open position of the swing flap according to arrows 9 and 13 equally in the individual intake 4 and 5 is directed. In the shooting position (left half in 4 ) are the end faces of the pivoting flap 10 on the other hand, on the side wall 14 and the front of the partition 6 on, so that the pivoting flap 10 forms a sloping flow area for the supplied combustion air and this completely according to the arrow 9 into the individual intake manifold 4 passes.

Claims (7)

Intake manifold for a multi-cylinder internal combustion engine, each cylinder of the internal combustion engine via a respective intake manifold ( 3 ) Combustion air can be supplied and in the intake manifold ( 3 ) each have an adjustable pivoting flap ( 10 ) is arranged to regulate the incoming combustion air, characterized in that the suction pipe means ( 3 ) two individual intake pipes ( 4 . 5 ), one of which via a pivoting flap ( 10 ) is to close or open, and that the pivoting flaps ( 10 ) on independent single-pivot bearings ( 11 ) are stored. Intake manifold according to claim 1, characterized in that the pivoting flaps ( 10 ) in the branching area between a common, single-suction intake duct ( 7 ) per cylinder and the two individual intake manifolds ( 4 . 5 ) is arranged. Intake manifold according to claim 1 or 2, characterized in that the pivoting flaps ( 10 ) on the inner wall of a duct or suction pipe ( 4 respectively. 5 ) are stored. Intake manifold according to claim 1 or 2, characterized in that the pivoting flaps ( 10 ) on a partition wall ( 6 ) between the two individual intake manifolds ( 4 . 5 ) are stored. Intake manifold according to one of claims 1 to 4, characterized in that the pivoting flaps ( 10 ) are stored in the region of one of their end faces. Intake manifold according to one of claims 1 to 4, characterized in that the pivoting flaps ( 10 ) are stored centrally. Intake manifold according to one of claims 1 to 6, characterized in that the pivot axis of the pivoting flaps ( 10 ) perpendicular to the longitudinal axis of the suction tubes ( 4 . 5 ) stands.