DE102008047079A1 - Intake module for internal combustion engine, has entrance area, and plenum area for connecting to internal combustion engine, where cooling unit has two cooling sections - Google Patents

Abstract

The intake module has an entrance area (2) and a plenum area (3) for connecting to an internal combustion engine. A cooling unit (5) has two cooling sections (6,7), where detection region is arranged between the cooling sections. A gas flows between the cooling sections.

Description

The The invention relates to an intake module for an internal combustion engine the preamble of claim 1.

It is known, a cooling member for cooling the gas supplied to an internal combustion engine in an intake module to provide integrated. Mostly the temperature of the engine supplied Gas flow during normal operation by a compressor such as an exhaust turbocharger and / or an amount of recirculated exhaust gas increased, so that cooling through the cooling member cheap or even necessary influence on operation and efficiency of the engine Has. in principle can such a cooling member alternatively or in addition to other heat exchangers such as a arranged on the front of the vehicle, direct Intercooler be provided.

It the object of the invention is to specify an intake module for an internal combustion engine, in which an improved cooling can be achieved in a given space.

These Task is for an initially mentioned intake module according to the invention with the characterizing features of claim 1. By the provision of two cooling sections with deflection region arranged therebetween, the required for cooling Flow depth of the cooling member be distributed over several sections, making the space better is usable. Furthermore, an intermediate distribution in the transverse direction given in the deflection, resulting in total to a homogenization the gas temperature over the cross section of the plenum area when entering the internal combustion engine and contributes to optimizing the cooling performance. moreover a structural simplification can be achieved by, for example in tube-and-fin design, the number of rows of tubes of each radiator sections or the individual cooler is reduced.

Under a valve member is to be understood in particular a flap. The Flap can be formed in one piece or multiple parts. Further are Under a valve member to understand control elements that are used to control a volume flow are suitable such as a slide or a tap or a diaphragm valve.

to Optimizing the design and ensuring good turbulence in the deflection region, it is provided in a preferred embodiment that the gas flow in the deflection area is deflected by an angle α becomes. The angle α is in particular 40 ° ≤ α ≤ about 180 °. In this Design, the cooling element considered in conjunction with the deflection also as a U-flow cooler become. Especially for the often limited space in the engine compartment, especially of cars Such an arrangement ideal for a compact intake module laterally a cylinder head of the engine to position. Depending on the structural Requirements, the deflection area but also any have other deflection angles such as 45 °, 90 ° or 120 °.

at A preferred embodiment of the invention is between the inlet area and the plenum region, a bypass channel is formed, wherein the bypass channel adjustable by a valve member is closed. Under a valve member is to be understood in particular a flap. The flap can be one-piece or be formed in several parts. Further, under a valve member To understand control elements that are used to control a flow are suitable such as a slide or a tap or a diaphragm valve.

The Valve member can in concrete shape, for example as a butterfly valve be formed or as a valve or valve spool or diaphragm valve. As a result, for example, in warm-up phases or other operating conditions a desired Bypassing of the cooling member be achieved. In particular, the valve member may have multiple positions by which a graduated or continuous division the gas flow to the cooling member and the bypass channel is achieved. In a preferred detail design is the valve member in the flow direction the gas flow in front of the first cooler arranged. Such a bypass channel may vary depending on requirements be designed in any shape, for example as a box-like casing integrated molded passage or as a separate, tubular attached outer bypass channel.

In a further preferred embodiment, a valve member is arranged after the first radiator section, in particular after the first radiator, wherein the gas flow through the cooling member by means of the valve member is adjustable throttled. The valve member may be formed in concrete shape, for example, as a butterfly valve or as a cock or valve spool or diaphragm valve. As a result, depending on requirements, for example, a negative pressure in the plenum can be increased, for example, to increase a downstream of the valve member supplied exhaust stream for pollutant reduction (in particular high-pressure exhaust gas recirculation). Also in connection with a bypass channel can be effected by the throttling valve member, which may be provided, for example, in addition to another valve member in the bypass channel, a more extensive and in particular complete deflection of the gas flow through the bypass channel. In a preferred detail design, the valve member is in front of the two Th cooler section, in particular after the second radiator, in particular in the deflection region arranged. The deflection area provides an ideal and already existing space for the arrangement of the valve member.

Generally has the increase the gas flow temperature by bypassing the cooling member advantages over the Example of throttling a coolant flow through the cooling member, because the temperature rise takes place immediately and a boiling of the coolant is effectively avoided. Alternatively or in addition, however, can also be a scheme of the coolant flow through the cooling member be provided to influence the gas flow temperature.

at an advantageous embodiment the invention opens an exhaust gas recirculation in the intake module. In a preferred detail design opens the Exhaust gas recirculation here at least partially in the deflection region, in particular in one first branch in the deflection region and in a second branch in the plenum area. This allows a distribution of the recirculated exhaust gas on a chilled and an uncooled one Route depending on requirements. By a z. B. upstream in the deflection Throttle member may be the recirculated exhaust gas amount and / or their distribution to the branches. Of the Exhaust gas flow can over further heat exchangers already pre-cooled And depending on requirements can also be an additional, in the exhaust branch arranged control valve may be provided.

at a structurally particularly simple embodiment of the first cooler section and the second radiator section be designed as sections of a structural unit, in particular from the same cooling circuit flows through are. There may be a gas flow-side parting plane between the coolers, for example in the form of a coolant disc, an empty pipe or a separating plate. Even with training of the two radiator sections as a structural unit, a differentiated embodiment of the single cooler present, for example by using different rib designs, different design of embossed winglets or the like.

at an alternative advantageous embodiment, the first cooler section and the second radiator section flows through in each case separate coolant flows. In a In another embodiment, the first radiator section is a separately designed one cooler and the second radiator section too a separately designed radiator. This leaves to achieve a further optimization of the performance of the cooling member, for example by providing a high temperature cooling circuit for the first radiator section, especially for the first cooler, and a low-temperature cooling circuit for the second Cooler section, especially for the second cooler. It can also split the heat flows and reduce the heat load in the low temperature cooler (second radiator section, especially the second cooler) be achieved. In particular, the first radiator section, in particular the first cooler, (High-temperature radiator) can be connected to a coolant circuit with elevated Pressure and flow are connected. The two cooler sections, especially the two coolers, in particular also consist of different materials, in particular the second radiator section, especially the second cooler, with regard to accumulating condensate, in particular exhaust gas recirculation, in Terms of increased Corrosion resistance (steel or corrosion-resistant aluminum), condensate drain and pollution resistance can be optimized. Exhaust gas can do this For example, be introduced into the deflection on the high pressure side, being an exhaust gas recirculation valve can be integrated into the intake system such that recirculated exhaust gas amounts in deflection and plenum area and thus the performance the exhaust gas cooling controllable are. Also a precise temperature of the gas flow through control of the coolant flow is particularly differentiated executable, for example by preferably the coolant flow the second radiator section, in particular the second cooler, changed becomes.

at a generally advantageous embodiment is the entrance area arranged in the direction of gravity below the plenum area. This reduces the height of the motor. In addition, this is a particularly good flow of in the second cooler section, especially in the second cooler, accumulating condensate in the plenum realizable. Generally In this case, advantageously, the plenum area has a direction of flow down directed tilt.

to optimal adaptation of the intake module to typical for internal combustion engines to disposal standing construction spaces it is envisaged that the deflection area and the cooling member in terms of gravity are arranged substantially side by side.

ever according to requirements are available for the cooling member different possible Designs, wherein the first cooler section, especially the first cooler, and / or the second radiator section, especially the second cooler, as a tube-rib system or as a disc-rib system or as a tube bundle system are formed. Particularly preferred is at least one of the cooler sections, in particular at least one of the coolers, designed as a tube-rib system. The radiator gates, especially the coolers, can also have different types of construction.

at an optimized embodiment has a geometric flow cross-section the second radiator section, in particular the second radiator, a other, especially smaller size than a geometric flow cross section the first cooler section, in particular the first radiator. in this connection is taken into account the fact that the gas flow through the first cooler section, especially through the first cooler, undergoes a cooling and a corresponding to the pressure drop smaller cross-sectional area of second cooler section, in particular the second cooler, offering. Depending on requirements but also the second radiator section, especially the second cooler, one have larger cross-sectional area, For example, if significant amounts of exhaust gas between the first and second Cooler section, especially between the first and second radiator, are supplied.

In an advantageous development of the invention, the drive is carried out the at least one valve member by means of an actuator. The actuator may be an electrical actuator. In another education In the invention, the actuator is a pneumatic actuator. In a Another advantageous development of the actuator is particularly advantageous in the case integrated. In particular, the housing of the intake module has a Installation space in which the actuator can be arranged.

Further Advantages and features of the invention will become apparent from the following described embodiments and from the dependent claims.

following be several embodiments described the invention and with reference to the accompanying drawings explained in more detail.

1 shows a spatial view of a first embodiment of a suction module according to the invention.

2 shows the intake module 1 in a plan view from the side with transparent housing walls.

3 shows a spatial view of the intake module 1 with transparent housing walls.

4 shows a spatial view of a second embodiment of the invention.

5a shows a spatial view of another embodiment of a suction module according to the invention.

5b shows the in 5a shown partial view of the intake module partially cut.

6 shows a side plan view of the intake module 5a with transparent walls.

The first embodiment according to 1 shows an intake module with a housing 1 that has an entry area 2 , a plenum area arranged in the gravity direction above the entrance area 3 and a side next to entry area 2 and plenary area 3 arranged deflection area 4 , The term plenum area is understood to mean the area in the manner of an intake manifold, via which the gas stream supplying the engine is supplied to the mostly multiple intake passages of the cylinders. The plenum area 3 includes a flange 3a for attachment to the internal combustion engine, not shown. On the case 1 are also stiffening ribs 1a arranged for mechanical stiffening. The housing is made of any suitable material, such as a metal, e.g. Example, aluminum, magnesium, plastic or a composite material of a combination of, for example, a metal and a plastic.

Especially may be a section of the intake module in which the entry area is arranged to the charge air inlet, made of a different material be trained as the rest Part of the intake module. The section of the entry area for the charge air is especially temperature resistant as the remaining part of the intake module and in particular from a high temperature resistant Plastic and / or a metal formed.

Between the deflection area 4 on the one hand and the stacked entrance and plenum areas on the other hand is a cooling member 5 in the case 1 used that of a liquid coolant, for example, a low-temperature cooling circuit via connections 5a . 5b can be flowed through. The cooling member 5 extends essentially over the entire height of the housing 1 and includes a first, lower section 6 for forming a first radiator section or a first radiator and a second, upper section 7 for forming a second radiator section or radiator. The two radiator sections 6 . 7 or the two coolers 6 . 7 are formed as with respect to the gas flow over a baffle (not shown) separated sections of a unitary cooler in tube rib construction. In particular, the cooling member may be formed as a single-row tube fin cooler. In another embodiment, the cooling member is formed as a two-, three- or more-row tube fin cooler.

In 2 and 3 is shown that between entry area 2 and plenary area 3 one Passage for the formation of a bypass channel 8th is provided, of an adjustable first, designed as a valve flap valve member 9 is lockable adjustable.

In the deflection area 4 is also another passage 10 formed by a second formed as a valve flap valve member 11 is lockable adjustable. The second valve member 11 can depending on the position of the radiator sections 6 . 7 or cooler 6 . 7 throttling gas flow through until complete closure.

The cooling member 5 is uneven in the two cooler sections 6 . 7 or cooler 6 . 7 split, wherein a geometric cross-sectional area of the second radiator portion 7 or the radiator 7 due to the cooler there gas flow is smaller than the cross-sectional area of the first cooler section 6 or the radiator 6 ,

2 shows the actual installation position of the intake module, with the flange 3a has a perpendicular cross-sectional area. In particular, the bottom of the plenary area 3 is inclined in the direction of the internal combustion engine to the downwards, so that in the second cooler section 7 or in the second cooler in the resulting condensate is better dissipated to the engine out.

The gas flow to supply the internal combustion engine is at entry into the inlet area of compressed and heated charge air, which may be added depending on the design already recycled exhaust. In a main mode with the first valve member closed 9 and at least partially opened second valve member 10 The charge air first flows through the first Kühlerabschitt after entering the inlet area 6 or the first cooler 6 and is cooled by a first temperature difference. Subsequently, the gas flow in the deflection region 4 in the present 180 ° deflected and homogenized by transverse flows and then flows through the second cooler section for further cooling 7 or the second cooler 7 , Subsequently, the gas flow passes through the plenum area 3 in which there is further homogenization and distribution to the intake ports of the cylinders of the engine.

In other modes, it is provided, for example, that the bypass channel 8th in a warm-up phase of the engine, through the valve member 9 at least partially open. By additionally closing the second valve member 11 If required, a complete passage of the gas flow through the bypass channel can be effected.

Furthermore, it may be provided that an exhaust gas recirculation (not shown) into the deflection region 4 downstream of the second valve member 11 and / or in the plenary area 3 flows, in particular via partial flows in both areas. By controlling the second valve member 11 As a throttle element, the amount of recirculated exhaust gas can be adjusted.

In the intake module according to the second embodiment, the only difference from the first embodiment is the cooling member 5 with separate coolers 6 . 7 formed, each of a first coolant flow via connections 6a . 6b and a second coolant flow via ports 7a . 7b can be flowed through. In particular, the second cooler 7 can be designed controllable in its performance via a control of the coolant flow to achieve a practical fine adjustment of the charge air temperature depending on the operating condition.

The third embodiment according to 5a . 5b and 6 differs from the first example in that the entry area 2 here above the plenary area 3 is arranged.

5b shows the in 5a shown partial view of the intake module partially cut. For the same features, the same reference numerals are used as in the previous figures.

Charge air or, in another embodiment of the invention, a mixture of charge air and recirculated exhaust gas flows via the charge air inlet LLE via the inlet, which is not described in greater detail, into the intake module. In the case shown, the valve member 9 shown in a position in which no bypassing the charge air to the intercooler 6 . 7 can be done. In another position, not shown, of the valve member 9 a part or the entire charge air or in another embodiment, the mixture of charge air and recirculated exhaust gas without in the intercooler 6 . 7 to be cooled on the intercooler 6 . 7 by default and are delivered directly to the plenary.

In 5b is still the formation of the cooling member 5 comprising a first radiator section 6 and a second radiator section 7 or in another embodiment of the invention, wherein the cooling member is a radiator 6 and a second radiator separately formed therefrom 7 has, made visible. The cooling member 5 has an inlet connection to the coolant inlet KE, into the coolant into the cooling element 5 flows. The cooling member has a plurality of flow channels 50 on. The coolant, in particular a water-containing cooling liquid or air, flows in the flow channels of the second cooling section 7 , in particular the second radiator 7 , and then in the flow channels 50 of the first radiator section 6 or the first radiator 6 to the coolant outlet KA. The flow channels 50 are in the illustrated embodiment flat tubes made of aluminum, stainless steel or another metal or other thermally conductive material. In another embodiment of the invention, the flow channels are provided with a coating which causes corrosion of the flow channels 50 prevented.

Furthermore, another valve member 11 intended. In the illustrated valve position of the valve member 11 the charge air or, in another embodiment of the invention, a mixture of charge air and recirculated exhaust gas flows via the charge air inlet LLE into the intake module, then flows through the first cooler section 6 , in particular the first cooler 6 , is deflected and then flows through the second radiator section 7 or the second cooler 7 ,

The first cooler 6 and / or the second radiator 7 are in particular designed as a U-flow cooler, in particular the inlet connection and the outlet connection are arranged on the same side.

In 6 is shown an operating state, in particular a cold start phase, in which the first valve member 9 fully open and the second valve member 11 is completely closed, so that the entire gas flow flows through the bypass channel.

It it is understood that the respective features of the individual embodiments Depending on the requirements can be combined with each other in a meaningful way.

Claims (18)

Intake module comprising an inlet region ( 2 ) and a plenum area ( 3 ) for connection to an internal combustion engine, wherein between the inlet region ( 2 ) and the plenum area ( 3 ) a cooling member ( 5 ) for cooling one of the entry region via the plenum region ( 3 ) is arranged to the internal combustion engine guided gas stream, characterized in that the cooling member ( 5 ) at least a first cooler section ( 6 ) and at least one second cooler section ( 7 ) as well as with respect to the gas flow between the first and second cooler sections ( 6 . 7 ) arranged deflection region ( 4 ) having. Intake module according to claim 1, characterized in that the first cooler section ( 6 ) and the second cooler section ( 7 ) Part to form a single cooler. Intake module according to claim 1, characterized in that the first cooler section ( 6 ) is a first radiator and the second radiator section ( 7 ) is a second radiator formed separately from the first radiator. Intake module according to one of the preceding claims, characterized in that a deflection region ( 4 ) is provided for deflecting the gas by an angle α, in particular 40 ° ≤ α ≤ substantially 180 °. Intake module according to one of the preceding claims, characterized in that between the inlet region ( 2 ) and the plenum area ( 3 ) at least one bypass channel ( 8th ), wherein the at least one bypass channel ( 8th ) by at least one valve member ( 9 ), in particular by at least one flap or other control element, is adjustable closed. Intake module according to claim 5, characterized in that the at least one valve member ( 9 ) in the flow direction of the gas flow in front of the first cooler ( 6 ) is arranged. Intake module according to one of the preceding claims, characterized in that after the first cooler section ( 6 ) a valve member ( 11 ), wherein the gas flow through the cooling member ( 5 ) by means of the valve member ( 11 ) can be throttled. Intake module according to claim 7, characterized in that the valve member ( 11 ) in front of the second cooler section ( 7 ), in particular in the deflection region ( 4 ) is arranged. Intake module according to one of the preceding claims, characterized characterized in that an exhaust gas recirculation in the suction module opens. Intake module according to claim 9, characterized in that the exhaust gas recirculation at least partially into the deflection region ( 4 ), in particular in a first branch of the deflection ( 4 ) or in a second branch of the plenary session ( 3 ). Intake module according to claim 9 or 10, characterized in that the exhaust gas recirculation downstream of the second cooler section in the plenum area ( 3 ) opens. Intake module according to one of the preceding claims, characterized in that the first cooler section ( 6 ) and the second cooler section ( 7 ) are flowed through by the same cooling circuit. Intake module according to one of claims 1 to 11, characterized in that the first cooler section ( 6 ) and the second cooler section ( 7 ) are flowed through by separate coolant streams. Intake module according to one of the preceding claims, characterized in that the inlet region ( 2 ) in the direction of gravity substantially below the plenum area ( 3 ) is arranged. Intake module according to one of the preceding claims, characterized in that the plenum area ( 3 ) has a downward slope in the flow direction. Intake module according to one of the preceding claims, characterized in that the deflection region ( 4 ) and the cooling member ( 5 ) are arranged substantially side by side with respect to gravity. Intake module according to one of the preceding claims, characterized in that the first cooler section ( 6 ) and / or the second cooler section ( 7 ) is designed as a tube-rib system and / or as a disc-rib system and / or as a tube bundle system. Intake module according to one of the preceding claims, characterized in that a geometric flow cross section of the second cooler section ( 7 ) has a different, in particular smaller size than a geometric flow cross-section of the first cooler section ( 6 ).