WO2007003442A1 - Intake system of an internal combustion engine - Google Patents

Abstract

The invention relates to the intake system of an internal combustion engine, wherein every cylinder of the internal combustion engine is associated with an individual intake pipe. A dust filter is provided in every intake pipe or on every intake pipe. Every intake pipe leads into a flange unit that establishes the connection to the cylinder head of the internal combustion engine.

Description

description

Technical Field The invention relates to an intake system of an internal combustion engine.

State of the art

From DE 198 01 667 is an intake system for a Verbrennungs¬

motor of a motor vehicle known. This intake system has two

circumferentially closed intake pipes. The intake air flows in

these two intake pipes and is from there to a not darge

put the engine forward. Essential in the prior art is the

Passing the intake air to a radiator. A disadvantage of this Einrich¬

tion can be seen in the fact that the arrangement in the hood

is provided so that the radiator remains unaffected.

It is further from the US Patent 4,932,490 an intake system for a

Internal combustion engine to take, the air over a single An¬

Suction pipe flows in at the front of a vehicle, there by a Fil¬

terelement is passed and then via the intake pipe

continues to the engine. The connection between the engine

Hood-proof intake pipe and the engine itself is done via a flexible

Intake line, which makes it possible to open the hood, without the An¬

to remove suction line. Again, there is the disadvantage that the

Flow paths for the individual cylinders of the internal combustion engine run a single channel and thus the flow of zu¬

guided air for the individual cylinders mutually influenced.

It is also from the G 85 22 392.1 a motor vehicle with one of the

Body-worn internal combustion engine and one zu¬ with the engine zu¬

ordered supply system and an air filter, the front

Part of the bodywork of the motor vehicle a hollow element with a

Wall, which has openings comprises, over which the cavity

of the element is in communication with the outside space and Ver¬

connecting means for connecting the cavity with the inlet opening

the air filter of the engine is provided. Again, there is the disadvantage

that all the air must flow in through the hollow element and from

there together is passed through an air filter. This means that one

rigid positioning of the air duct is required. A flexibility -

also with regard to different body shapes or unterschied¬

Licher engines - is not possible, but requires new, constructive

Solutions.

The invention is based on the object to the disadvantages mentioned

Avoid and use an intake system for an internal combustion engine too

create, which is an optimal filling of the individual cylinder

Internal combustion engine allows.

Disclosure of the invention So far, suction systems usually consist of air collectors, the

are connected to a filter element. From this air collector er¬

stretch individual Ansaugrohrstücke to the cylinder head one

Internal combustion engine. Depending on the structure of the intake systems, the ein¬

individual cylinder of the internal combustion engine with different amounts of air

provided. It has been tried so far, by skillful Anord¬

offset from baffles or deflections. An optimal

However, filling the individual cylinders is not guaranteed in every case.

The main advantage of Einzelansaugung or a cylinder-selective

Suction tube is that this on the internal combustion engine or in

Engine compartment of a vehicle can be optimally positioned.

According to one embodiment of the invention, the Flan unit with Ein¬

designed butterfly valves. This means that every cylinder is optimal

can be filled and when using individual throttle valves

Angle of the throttle valves can be compensated. Farther

can according to the design in the Flanheitheit exhaust gas recirculation channels

for introducing exhaust gas into the individual cylinders of the internal combustion engine

be arranged. The flange unit also has cylinder-selective injection

nozzles and / or Luftverwirungsungselemente, also located in

Each flange unit is a sensor for air mass measurement.

Of course, it is also possible, the air mass measurement

only to perform on a cylinder within the flange unit and a calculation of the total air mass for the other cylinder vor¬

increase.

According to a further embodiment, the dust collector, which is

located at the respective intake pipe, for example from an inline

filter, which is tubular. Such an inline filter is beispiels¬

Written in DE 10 2004 000 048. Likewise, such an In¬

Line filter shown in DE 10 2004 049 403. Draw this inline filter

characterized by a compact and highly efficient design. It also exists

the ability to design the dust collector as a flat filter. One

such flat filter is shown for example in US 6,039,779. Also

any filter element shapes, such. B. in DE 43 28 846, are possible.

The essential criterion here is the optimal adaptation of Staubab¬

separators in the existing and available space.

In an advantageous embodiment, each intake pipe consists of a

flexible, malleable plastic tube, which after forming in a

rigid arrangement can be brought. For the production of such

Plastic pipe is, for example, the blow molding process. It be¬

But it is also possible to extrude such plastic pipes.

According to the invention, the individual components with a Rast¬

or snap connection designed so that a simple and quick

Connection between intake system, Flan unit and / Staubab¬

separator is possible. The mouth region of each intake pipe can with a mouth flap be provided to redu¬ the intake noise

adorn. Likewise, it is possible to create a damp

to arrange activity or water separator.

The invention also relates to an intake air passage for a Verbrennungs¬

motor of a motor vehicle within a abge of a bonnet

covered engine compartment. Especially in the engine compartment of a motor vehicle

Restricted installation situations prevail, therefore it is advantageous, no

to use rigid Ansaugsystemgebilde but the suction for

to design each individual cylinder individually and to exploit spaces

their use by a rigid complete system not possible

would. The only connecting component between the cylinders can be

According to one embodiment of the invention, the Flan unit over meh¬

rere cylinder heads extend.

The invention also relates to a method for producing a Ansaug¬

system of an internal combustion engine of a motor vehicle, wherein each An¬

Suction pipe is optimized so that it in the engine compartment on the one hand

can be fastened under the least possible space and on the other hand

also an optimal course in terms of acoustic properties

having.

These and other features are not only in the claims, but

Also included in the description and drawings.

Brief description of the drawings The invention will be described in more detail below with reference to exemplary embodiments

explained. It shows:

Figure 1 is a schematic representation of an intake system of a

Internal combustion engine,

FIG. 2 shows a detailed representation of a flange unit;

FIG. 3 shows a further variant of a flange unit,

FIG. 4 shows a flange unit with a collector system,

Figure 5 is a schematic representation of an intake system in

Engine compartment of an internal combustion engine - Variant 1,

Figure 6 is a schematic representation of an intake system in

Engine compartment of an internal combustion engine - variant 2,

Figure 7 is a schematic representation of an intake system in

Engine compartment of an internal combustion engine - variant 3 and

Figure 8 is a schematic representation of an intake system in

Engine compartment of an internal combustion engine - variant 4.

Embodiment (s) of the invention

In Figure 1, an internal combustion engine 10 in a schematic representation

shown. This has a cylinder head 11, on which a

Flan unit 12 is located. This Flan unit will follow closer

described. At this Flanheitheit 12 are four individual intake 13,14,

15 and 16 arranged. These individual intake manifolds can be different

Have tube courses and are equipped with individual filter elements. There is the possibility of different or uniform Filterelemen¬

to arrange. As an example, here are a round filter element 17, as bei¬

For example, described in DE 10 2004 000 048, a Flachfilter¬

element 18, as described, for example, in US Pat. No. 6,039,779

tubular filter element 19, as for example from the Staub¬

Suction filter technology is known, or a cyclone separator 20, as bei¬

For example, from DE 103 53 367 known. Of course, be¬

Kinds of filter types and systems conceivable. It is advantageous in Verwen¬

tion of a filter system in the context of this intake an Online¬

filter, which is optimized in terms of space requirements. The raw air

suction in front of the filter is also a tube 26, 27, 28, 29. Each tube

is provided with a mouth region 30, 31, 32, 33. At this Mün¬

For example, a muzzle flap or the like

be arranged. It is essential that this estuary a

optimal flow for the sucked air allows.

A flange unit 12 is shown in an enlarged view in FIG. 2

shown. On the cylinder head 11, the flange unit with one is not here

attached screwed connection shown. This Flan unit points

a single throttle 21, which is mounted on an axle 34 movable

is on. Furthermore, the flange unit is equipped with an exhaust gas recirculation

opening 23 provided. Exhaust gas flows into the fresh air via this opening

a, is swirled within the Flanheitheit 12 and enters the respective cylinder. Furthermore, other openings, such as opening 35, to

Be provided blowing of secondary air. At the Flan unit 12

is also an injection nozzle 22 for injection of the required Kraft¬

substance quantity attached. On the cylinder head 11 opposite

Side of Flanheitheit is the respective Einzelsaugrohr 13 with a

Plug, adhesive or locking connection to the flange unit 12 fixed. In

The example shown here is located between the individual intake manifold

13 and the receiving opening 36 of the Flan unit a O-ring 37, the for

ensures a reliable seal. In the example shown here

the reliable connection between flange unit and individual intake manifold

via a latching connection 38 with corresponding latching noses or Aufnah¬

men at the Flan unit 12.

Figure 3 shows a schematic representation of individual intake with Luft¬

Filter Modules 24. The modular air ducts lead to a Flanschseg¬

ment 39 with high functional integration. Inside or outside of

Flange segment are throttle valves 25 with a common

Throttle valve control disposed over the throttle shaft 40.

Again, the flange segment 39, for example, air supply ducts,

Injectors or the like on. The flange segment is at one here

only schematically indicated cylinder head 41 of an internal combustion engine

attached. As can be seen, initially the modular air ducts run

parallel, starting from the connection level 42. The length of the individual NEN modular air ducts is arbitrary. So can - tuned to

the respective engine characteristic - the length of each air duct to the length

of the other air duct, or it may - depending on the engine type - one

adapted, but uniform air channel length to the flange 39th

be adapted. The air filter modules 24 are for example preformed

Filter body, which are inserted only in the air ducts and relative

are easily replaceable.

FIG. 4 shows a flange unit with a collector system. Here exists

initially no direct connection between the flange 12 and the

Single suction pipes 43. Between these elements are two Sammler¬

Rooms 44, 45 arranged. Between these two is one

Control flap 46, which completely connects the collector rooms or teil¬

wise decoupled from each other.

FIG. 5 shows, in a first variant, the distribution of the individual intake pipes

13, 14, 15, 16 in the engine compartment of an internal combustion engine. Same parts

are provided with the same reference numerals. At the individual intake 13th

to 16 are round filter systems 17a, 17b, 17c, 17d. The suction

the air for the internal combustion engine is symmetrical left and right

distributed within the engine compartment. For example, the air intake

immediately behind the headlights of the vehicle.

Figure 6 shows in a second variant, the intake asymmetric left

and distributed right inside the engine compartment. The intake pipes 13, 14 and 15 lead to the left, the intake pipe 16 leads to the right. These asym¬

metric distribution is particularly advantageous when inner¬

half of the engine compartment other asymmetrically arranged components,

such as oil cooler or fan systems are located.

FIG. 7 shows, in a third variant, the intake pipes 13, 14, 15, 16, wel¬

che in the direction of travel and against the direction of travel are arranged. We¬

Here, the fundamental idea that where in the engine compartment a ge

suitable space is available, the intake pipes can be arranged.

The variant in Figure 8 again shows the intake pipes 13 to 16, wherein

here all intake pipes extend in the same direction, but the

two intake pipes 14 and 15 are guided over the engine. It will

possible to install the engine so that the flange unit in the direction

Passenger interior is addressed.

Claims

claims 1. intake system of an internal combustion engine, wherein each cylinder of Brenn¬ engine is assigned a single intake pipe and in each An¬ suction pipe or at each intake pipe a dust collector is located and where each intake pipe into a Flanheitheit opens which the connection to produces the cylinder head of the internal combustion engine. 2. intake system according to claim 1, wherein the Flanheitheit with Einzeldrossel¬ flaps and high functional integration is equipped. 3. intake system according to claim 1 or 2, wherein the dust collector a Flach¬ filter, round filter, cyclone separator or filter bag is. 4. intake system according to claim 1, wherein in the Flanheitheit exhaust gas recirculation Channels, injectors, Luftverwirbelungselemente and sensors for Luft¬ mass measurement are arranged. 5. An intake system according to claim 1, wherein each intake manifold is made of a flexible, malleable plastic tube, which after forming into a rigid Arrangement is brought. 6. intake system according to claim 1, wherein the connection between intake manifold, Flan unit and / or dust separator a snap or snap connection is. 7. intake system according to one of the preceding claims, wherein each Ansaug¬ pipe has a mouth area and this mouth area more Functional components, such as moisture separator or outlet flap auf¬ has. 8. Intake air duct for an internal combustion engine of a motor vehicle within a hood covered by an engine compartment, this for the Admission of the intake air has a mouth area, a Staubabschei¬ the and an intake pipe, which opens into a Flan unit and this Flan unit the connection to a single cylinder head Brenn¬ producing engine, wherein for each cylinder head a single Ansaug¬ air duct is provided. 9. intake air duct according to claim 8, wherein the Flanheitheit over several Cylinder heads of the internal combustion engine extends. 10. A method of manufacturing an intake system of an internal combustion engine a motor vehicle within a Mo¬ covered by a hood Torraumes, each cylinder of the internal combustion engine a single An¬ is associated with the intake manifold and in each intake manifold or on each Ansaug¬ pipe is a dust collector, each intake pipe in a Flanschein¬ unit opens, which the connection to the cylinder head of the internal combustion engine produces and each intake pipe such in the engine compartment of the internal combustion engine runs, that it is the optimal intake and an optimal Leitungs¬ course under stress minimal space requirement forms. 11. Intake system according to one of the preceding claims, wherein the intake pipes symmetrically distributed left and right in the engine compartment of the motor vehicle. 12. Intake system according to one of the preceding claims, wherein the intake pipes asymmetrically distributed left and right in the engine compartment of the motor vehicle. 13. intake system according to one of the preceding claims, wherein the intake pipes partly in the direction of travel and partly contrary to the direction of travel in the Engine compartment of the motor vehicle are distributed. 14. Intake system according to one of the preceding claims, wherein the intake pipes distributed over and / or laterally past the engine of the motor vehicle are.