DE102005059868A1 - Switchable suction pipe used in an intake tract of an internal combustion engine for regulating the throughput of an air and/or fuel/air mixture comprises a control device having one movable control element per inlet channel - Google Patents

Abstract

Switchable suction pipe (1) for regulating the throughput of an air and/or fuel/air mixture comprises a control device (5) having at least one movable control element (8) per inlet channel (3) for regulating the throughput through the corresponding inlet channel. Preferred Features: The inlet channels open into the control device where they are changed into a corresponding number of control channels (6). The control element is a valve or drum.

Description

The The invention relates to a switchable intake manifold device for control a flow of an air and / or fuel-air mixture according to the generic term of claim 1.

such Switchable Saugrohrvorrichtungen usually come in intake manifolds of internal combustion engines, in particular in internal combustion engines, the include a gasoline engine, for use, for example with rotary rollers or throttle valves.

Out WO 03/012268 A1 is an internal combustion engine with at least two Intake valves per cylinder, with at least two to the intake valves leading Intake ducts, of which a first inlet channel is preferably an unthrottled tangential channel accomplished is and the flow through a second inlet channel means one in dependence of at least one engine parameter operable first throttle device is controllable, with at least one fuel in at least two intake ports injecting fuel injector per cylinder, wherein in the closed state of the first throttle device by means of at least a leak opening the first throttle device a defined minimum flow can be generated by the second inlet channel, wherein the first throttle device downstream the fuel injection device is arranged and the at least a leak opening arranged in the impingement of at least one injection jet is, wherein the first throttle device in the closed state with a channel partition between the first and second inlet channels an obtuse angle (α) greater than 90 °, so that the fresh gas flow is diverted to the first inlet channel and wherein in the collecting channel upstream the fuel injector one preferably by a Flap formed second throttle device is arranged.

at the known solution occurs the disadvantage that the individual channels are not variable to each other are switchable. In addition, is for the switching a butterfly valve and for throttling a throttle as a separate component required.

It Therefore, the object of the present invention is a switchable Saugrohrvorrichtung for controlling a flow of an air and / or fuel-air mixture to create, in which the individual channels formed separately switchable are and in which the throttle and the switching flap in one Unit are integrated together, making them simultaneously and throttle position in the intake manifold takes over.

The Invention includes the technical teaching that in a switchable Saugrohrvorrichtung for Regulation of a flow of an air and / or fuel-air mixture, comprising one with a supply space on the input side fluidly connected Saugrohreinrichtung with at least two inlet channels and at least one, with a cylinder head output side fluidly connected outlet region and at least one between the inlet channels and the outlet arranged adjusting device for controlling the Flow through one of the inlet channels the actuator per Inlet duct at least one movable control element for control the flow through the respective corresponding inlet channel having.

These solution offers the advantage that by the formation of each one control element per inlet channel each inlet channel is separately adjustable. The switchable Saugrohrvorrichtung comprises a suction pipe device, which at least has two inlet channels. The inlet channels are fluidly connected to a supply space. The supply room can be designed as any form of supply space, wherein Also, the environment can act as a supply room, so too Ambient air can be sucked in. The inlet channels can be different be formed, for example, in terms of their length or their diameter and their course. Next, the suction tube means at least one outlet area. The outlet area is fluidic connected at the output side with a cylinder head. Preferably the outlet area is designed as an outlet channel. The outlet area can also be formed by means of multiple output channels, so that this, for example, the same number of output channels as on input channels or also control channels having. Also, any deviating number of output channels is realizable. Between intake manifold and outlet is an adjusting device formed. The adjusting device controls by means movable actuator or movable actuators the flow of the air and / or fuel-air mixture from the intake ports to Outlet. Each inlet channel is a movable actuator assigned, i. the flow through each inlet channel is by means of each of a separately controllable actuator adjustable.

For this purpose, it is preferable for the inlet channels to open into the adjusting devices, wherein the inlet channels are at least partially continued by the adjusting device in adjusting channels corresponding to the number of inlet channels. Preferably, the inlet channels are continued through the entire adjustment. It is conceivable that a plurality of actuating channels are formed per inlet channel, so that, for example, two actuating channels continue an inlet channel in the adjusting device. In particular, the control channels are different trained. Preferably, the control channels are designed differently with regard to their length, their geometry, their curvature and their flow cross-section. Particularly preferably, the control channels are formed differently in terms of their geometry, wherein a control channel is preferably designed to generate a tumble flow or can be, the other channel can also produce turbulence-free flows. In particular, the adjusting channels can be designed with different dimensions with regard to their flow-through length, their flow cross-section and their flow-through curvature.

Further it is preferred that the adjusting device has a first actuating device area which is formed adjacent to the inlet channels and a second adjuster portion adjacent to Outlet area is formed. In particular, the training the adjusting device and the actuating element in two Stelleinrichtungsbereiche or two control elements advantageous, wherein the sections of the control channels in the first actuator area as fixed actuator channel sections with an unchangeable one Flow cross-section are formed. Thus, the first governor area a continuation the inlet channels dar. The flowing through Fluid experiences In this area no significant change in terms of its Flow characteristics.

Prefers is that the sections of the control channels in the second Stelleinrichtungsbereich as at least partially variable control channel sections with a changeable Flow cross-section are formed. This results in the Possibility, regulate the flow through the actuator per channel separately. In particular, flow rate, flow and the like can be regulated. Through this training leaves the air flow in the intake manifold and lead to limit. In particular, this results in a better response when changing the adjusting device.

moreover is preferred that the variable Stellkanalabschnitte than at least a wall region having the movable actuator. hereby the actuator is so integrated into the actuator that the flow even by the adjusting element is not or not significantly affected. Due to the design of the control element as part of the conversion area Among other things, the flow rate as well as the flow rate can be determined regulate.

Especially is preferred that the actuating element is designed to be movable is to take each position to control the flow, wherein the positions the position range from inclusive all the way closed flow position up to and including fully opened Flow position and all Include intermediate positions. This allows a channel completely close or open completely. In addition, can be by appropriate position in intermediate positions nozzle functions the actuator or the actuator areas or more precisely of the channels realize. The actuator is infinitely variable in each intermediate position adjustable. In the intermediate positions it is by appropriate Locking devices held.

Prefers is that the actuator pivotally about an axis in the transition region of fixed actuator area or actuator channel section for variable Actuator area or actuator channel section between two adjacent control channels is arranged. It is also preferable that at least two adjusting elements adjacent control channels are arranged around a common axis. This can be done Arrange the control elements to save space. In addition, by the um an axis swivel arrangement easy control possible. The But actuator can also be mounted arbitrarily articulated, for example rotational, so that by means of translational motion a scheme can be done.

Prefers is that the actuator is selected from the group comprising Switching flaps and switching drums. This can be already existing Insert parts.

Further the invention improving measures are in the subclaims or together with the description below a preferred embodiment of the Invention with reference to the figures shown. It shows:

1 a schematic cross section of a switchable Saugrohrvorrichtung;

2a to 2d each different positions of the control elements in the switchable suction device.

1 shows a plan view of a cross section through a switchable Saugrohrvorrichtung invention 1 , The suction tube device 1 includes a suction tube device 2 which in turn has two inlet channels 3 , a first inlet channel 3a and a second inlet channel 3b , and an outlet area 4 having. The at least with regard to their length differently shaped inlet channels 3 are the input side fluidly connected to a supply space V. The channel cross-section of the inlet channels 3 is essentially constant, but can be configured as desired. The outlet area 4 is the output side with a cylinder head Z or with the channels running there flui connected. Between inlet channels 3 and outlet area 4 is an adjusting device 5 arranged. Preferably, the outer wall of the inlet channels 3 , the outlet area 4 and the actuator 5 formed in one piece. In the adjusting device 5 open the two inlet channels 3 and are there by control channels 6 continued. It is in 1 per inlet channel 3 a control channel 6 intended. The adjusting device 5 is in a first operator area 7a that is connected to the inlet channels 3 adjoins and a second actuator area 7b that is adjacent to the outlet area 4 is formed, divided. In the first actuator area 7a has the adjusting device 5 first control channels 6a or Stellkanalabschnitte, which is a continuation of the inlet channels 3 form and with regard to their channel flow meter (flow) fixed, that is formed unchangeable. In contrast, the adjusting device 5 in the second actuator area 7b second control channels 6b on which the first control channels 6a of the first operator area 7a continue, these second control channels 6b or the second actuating channel sections are variable with respect to their flow cross-section or diameter. For this purpose, the second actuator area 7b movable control elements 8th on. Per actuating channel 6 is an actuator 8th provided, so here for an upper control channel 6 ' which comprises both a first actuating channel section and a second actuating channel section, a first actuating element 8th' is provided. For a lower control channel 6 '' which likewise comprises both a first actuating channel section and a second actuating channel section, is a second actuating element 8th'' intended. The adjusting elements are preferably formed in one piece, but may for example also be designed in several parts, for example in the manner of a pinhole and the like. Preferably, the adjusting elements 8th in the transitional area between the first and second range of control equipment 7a . 7b arranged. Here are the control elements 8th preferably between two adjacently extending control channels 6 ( 6a . 6b ; 6 ' . 6 '' ) arranged. The control elements 8th or the actuator 8th is preferably arranged to be movable about a pivot axis. Here is the actuator 8th designed so that it has the flow area of a second control channel 6b or a second Stellkanalabschnittes completely block. The actuator 8th can also have a complete opening of the second control channel 6b and take any intermediate position between completely open and fully closed position. Different positions of the control elements 8th are in the 2a to 2e shown.

2a to 2d each show in plan view a cross section through a Saugrohrvorrichtung 1 , more precisely a section of the suction tube device 1 with the adjusting device 5 , The flow direction is from right to left. The upper actuating channel in the drawing 6 ' is also referred to as a torque channel, the lower actuating channel 6 '' Also referred to as a power channel. In 2a are both control channels 6 ' . 6 '' locked. In 2 B however, both are control channels 6 ' . 6 '' open. 2c shows the switching device 1 or more precisely, the adjusting device 5 with closed upper control channel 6 ' and with open lower control channel 6 '' , In this case, the first switching element closes 8th' the flow cross-section of the upper control channel 6 ' and the second actuator 8th'' points in the direction of the outlet area and allows a complete opening of the lower control channel 6 '' , In 2d on the other hand, the upper actuating channel is open, that is to say the first actuating element 8th' does not close the flow cross section of the upper control channel or only partially, and the lower control channel is closed, that is, the lower actuator 8th'' closes the flow cross-section of the lower control channel. By the adjusting elements 8th not only individual (control) channels can be switched, but it can also be the throttle function of the usual throttle through this are taken over, ie by forming the control element according to the invention, the throttle can be omitted. There are intermediate positions of the two actuating element 8th possible, which thus allow an optimal adaptation to load and / or speed of the engine. Accordingly, by the adjusting elements 8th a charge movement ("tumble") are generated, which can be increased or decreased depending on the design of the control elements 5 or the adjusting elements 8th can significantly affect the length of the air column in the intake manifold. An actuator positioned near the cylinder head 5 leads to shortened air columns and thus to an improved response or response of the engine to actuator element changes. Thus, different sized channel cross sections can be realized up to the actuator and thus until just before the cylinder head.

1

Saugrohrvorrichtung

2

intake pipe

3

inlet channel

3a

first inlet channel

3b

second inlet channel

4

outlet

5

setting device

6

adjusting channel

6a

first adjusting channel

6b

second adjusting channel

6 '

Oberer adjusting channel

6 ''

lower adjusting channel

7

Setting device range

7a

first Setting device range

7b

second Setting device range

8th

actuator

8th'

first actuator

8th''

second actuator

V

supply room

Z

cylinder space

Claims (10)

Switchable intake manifold device ( 1 ) for controlling a flow of an air and / or fuel-air mixture, comprising a suction pipe device (A) connected to a supply space (V) on the input side fluidly connected ( 2 ) with at least two inlet channels ( 3 ) and at least one, with a cylinder head (Z) output side fluidly connected outlet region ( 4 ) and at least one between the inlet channels ( 3 ) and the outlet area ( 4 ) adjusting device ( 5 ) for controlling the flow through one of the inlet channels ( 3 ), characterized in that the adjusting device ( 5 ) per inlet channel ( 3 ) at least one movable actuator ( 8th ) for controlling the flow through the respective corresponding inlet channel ( 3 ) having. Switchable intake manifold device ( 1 ) according to claim 1, characterized in that the inlet channels ( 3 ) in the actuator ( 5 ), the inlet channels ( 3 ) in terms of the number of inlet channels ( 3 ) corresponding control channels ( 6 ) by the adjusting device ( 5 ) are continued. Switchable intake manifold device ( 1 ) according to claim 1 or 2, characterized in that the adjusting device ( 5 ) a first actuator area ( 7a ) adjacent to the inlet channels (FIG. 3 ) and a second actuator area ( 7b ) adjacent to the outlet area (FIG. 4 ) is trained. Switchable intake manifold device ( 1 ) according to one of the preceding claims 1 to 3, characterized in that the adjusting channels ( 6 ) in the first setting device area ( 7a ) as fixed, first control channels ( 6a ) are formed with a non-variable flow cross-section. Switchable intake manifold device ( 1 ) according to one of the preceding claims 1 to 4, characterized in that the adjusting channels ( 6 ) in the second controller area ( 7b ) as at least partially variable, second control channels ( 6b ) are formed with a variable flow cross-section. Switchable intake manifold device ( 1 ) according to one of the preceding claims 1 to 3, characterized in that the variable control channel sections ( 6b ) as at least one wall region of the movable actuator ( 8th ) exhibit. Switchable intake manifold device ( 1 ) according to one of the preceding claims 1 to 6, characterized in that the actuating element ( 8th ) is designed to be movable so as to occupy each position for controlling the flow, said positions including the position range from including fully closed flow position to fully open flow position and all intermediate positions. Switchable intake manifold device ( 1 ) according to one of the preceding claims 1 to 7, characterized in that the actuating element ( 8th ) pivotable about an axis in the transition region of the fixed actuating channel ( 6a ) to the variable control channel ( 6b ) between two adjacent control channels ( 6 ) is arranged. Switchable intake manifold device ( 1 ) according to one of the preceding claims 1 to 8, characterized in that at least two adjusting elements ( 8th ) of adjacent control channels ( 6 ) are arranged about a common axis. Switchable intake manifold device ( 1 ) according to one of the preceding claims 1 to 9, characterized in that the adjusting elements ( 8th ) are selected from the group comprising switching flaps and shift drums.