CN201922921U - Exhaust device of horizontal engine - Google Patents

Exhaust device of horizontal engine Download PDF

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Publication number
CN201922921U
CN201922921U CN2010206583364U CN201020658336U CN201922921U CN 201922921 U CN201922921 U CN 201922921U CN 2010206583364 U CN2010206583364 U CN 2010206583364U CN 201020658336 U CN201020658336 U CN 201020658336U CN 201922921 U CN201922921 U CN 201922921U
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CN
China
Prior art keywords
exhaust
pipe portion
downstream
upstream side
vehicle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2010206583364U
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Chinese (zh)
Inventor
牛岛贤儿
长谷川裕一
中谷泰史
北畠启史
楠泰史
加茂寿章
中村好孝
渡边大辅
下地博喜
根上昌巳
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Mazda Motor Corp
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Mazda Motor Corp
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Filing date
Publication date
Application filed by Mazda Motor Corp filed Critical Mazda Motor Corp
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Publication of CN201922921U publication Critical patent/CN201922921U/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K13/00—Arrangement in connection with combustion air intake or gas exhaust of propulsion units
    • B60K13/04—Arrangement in connection with combustion air intake or gas exhaust of propulsion units concerning exhaust
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K5/00—Arrangement or mounting of internal-combustion or jet-propulsion units
    • B60K5/04—Arrangement or mounting of internal-combustion or jet-propulsion units with the engine main axis, e.g. crankshaft axis, transversely to the longitudinal centre line of the vehicle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F01N13/1811—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration
    • F01N13/1816—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration the pipe sections being joined together by flexible tubular elements only, e.g. using bellows or strip-wound pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F01N13/1811—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration
    • F01N13/1822—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration for fixing exhaust pipes or devices to vehicle body
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2340/00—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the apparatus; Spatial arrangements of exhaust apparatuses
    • F01N2340/04—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the apparatus; Spatial arrangements of exhaust apparatuses characterised by the arrangement of an exhaust pipe, manifold or apparatus in relation to vehicle frame or particular vehicle parts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Toxicology (AREA)
  • Health & Medical Sciences (AREA)
  • Exhaust Silencers (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Body Structure For Vehicles (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Abstract

The utility model provides an exhaust device (E) of a horizontal engine; an upstream exhaust apparatus (48) of the exhaust device comprises a plurality of branched pipe parts (32), a single exhaust pipe part (34) and a direct catalytic converter (40); the direct catalytic converter (40) is arranged on the rear side of a vehicle with an engine (1) in the state that the internal airflow of the converter is extended along the width direction of the vehicle by the overhead view; the part of the upstream exhaust apparatus (48) which is more adjacent to the upstream exhaust side than the single exhaust pipe part (34) is bent to the side of the width direction of the vehicle in the state that the downstream exhaust side of that part is adjacent to a speed changer (11) by the overhead view; and the single exhaust pipe part (34) is bent in the state that the downstream exhaust side of the part is toward the front side of the vehicle. Therefore, the upstream exhaust apparatus (48) can be compactly arranged in a motor chamber (19) without the occupation of the space in the vehicle; and the temperature of catalyst in the direct catalytic converter (40) can rise in advance when the engine (1) is at low temperature.

Description

The exhaust gear of transverse engine
Technical field
The utility model belongs to the technical field relevant with the exhaust gear of transverse engine, this driving engine with the bank of cylinder direction in the engine room of state landscape configuration at front part of vehicle of overall width direction.
Background technology
All the time, this transverse engine is widely known by the people, and the exhaust gear of this transverse engine is configured in the vehicle rear-side (for example opening (following it is called " patent documentation 1 ") 2008-260472 number with reference to the open communique spy of Japanese Patent) of this driving engine usually.This exhaust gear has a plurality of branched pipe portion that is communicated with respectively with a plurality of cylinders of driving engine, after these branched pipe portions converge, finally becomes single freeing pipe portion.In this device of patent documentation 1, all cylinders (four cylinders) are divided for by the mutual many groups cylinder group that constitutes of discontinuous a plurality of cylinders (cylinder group that is made of first cylinder and four-cylinder and the cylinder group that is made of second cylinder and the 3rd cylinder) of exhaust stroke, be provided with by each above-mentioned cylinder group and the branched pipe portion that is communicated with each cylinder of this cylinder group converged each other and convergence tube portion in the middle of a plurality of (two) that form, and convergence tube portions in the middle of these two are converged each other, with as single freeing pipe portion.In addition, also have be not provided with in the middle of convergence tube portion and all branched pipe portions are converged each other and form the situation of a convergence tube portion.
In addition, in the last few years, particularly the anti-emission carburetorization of the waste gas when realizing driving engine low temperature for the temperature that makes the catalyst in the emission-control equipment rises early, and was located at emission-control equipment than upstream side.In the above-mentioned patent documentation 1, emission-control equipment (direct-type catalyst) is set at convergence tube portion place, above-mentioned centre.
Yet, in order to improve the exhaust efficiency of driving engine, improve driving engine output, comparatively it is desirable to set branched pipe portion and middle convergence tube portion (being branched pipe portion when centre convergence tube portion is not set) long as far as possible.Based on such viewpoint, in patent documentation 1, also set branched pipe portion and middle convergence tube portion long, therefore, convergence tube portions are configured in the tunnel portion of the overall width direction central portion that is formed at base plate in the middle of two.
But, if like this convergence tube portions in the middle of two are configured in the above-mentioned tunnel portion, then the width of this tunnel portion, highly (sectional area) wait and can increase, particularly in patent documentation 1, because convergence tube portion place in the middle of emission-control equipment is located at, so the sectional area of tunnel portion can further increase.Therefore, based on the viewpoint of guaranteeing space, car chamber as far as possible widely, also there is the leeway of improvement in it.In addition, if emission-control equipment is located in the tunnel portion, then vehicle ' wind brushes emission-control equipment easily, and therefore the temperature of the catalyst in the emission-control equipment can not rise early when driving engine low temperature, from this point of view, also there is the leeway of improvement in it.
The utility model content
The utility model is In view of the foregoing finished, its purpose is to provide a kind of exhaust gear of transverse engine, the upstream side exhaust gear that comprises emission-control equipment can be disposed at engine room compactly and not sacrifice space, car chamber, and when driving engine low temperature, the temperature of the catalyst in the emission-control equipment is risen early.
The exhaust gear of transverse engine of the present utility model is arranged at driving engine, this driving engine have a plurality of cylinders of being the row shape and bank of cylinder direction one side be combined with change-speed box and with bank of cylinder along in the engine room of state landscape configuration at front part of vehicle of overall width direction, above-mentioned exhaust gear has with the face bonded assembly upstream side exhaust gear of the vehicle rear-side of above-mentioned driving engine and is arranged on the downstream freeing pipe in the exhaust downstream of above-mentioned upstream side exhaust gear.Above-mentioned upstream side exhaust gear comprises: a plurality of branched pipe portion is communicated with respectively with above-mentioned a plurality of cylinders and extending towards vehicle rear-side from the vehicle rear-side of above-mentioned driving engine; Single freeing pipe portion is arranged on the exhaust downstream of this branched pipe portion communicatively with above-mentioned a plurality of branched pipe portion; Emission-control equipment is connected with the end in the exhaust downstream of above-mentioned single freeing pipe portion.Above-mentioned emission-control equipment is with the state configuration of overlooking down this emission-control equipment gas inside stream and extending along the overall width direction vehicle rear-side at above-mentioned driving engine, the position that more is in exhaust-gas upstream side than above-mentioned single freeing pipe portion in the above-mentioned upstream side exhaust gear with the exhaust downstream of overlooking down this position to the approaching state of above-mentioned change-speed box to overall width direction one lateral bending song, above-mentioned single freeing pipe portion is with the state bending towards vehicle front side of the exhaust downstream of overlooking down this single freeing pipe portion, above-mentioned downstream freeing pipe is connected in the end in the exhaust downstream of above-mentioned emission-control equipment, with the state setting towards the tunnel opening portion of the overall width direction central portion of the dash shield bottom that is formed on above-mentioned vehicle of the connecting portion that links from this downstream freeing pipe and this emission-control equipment.
According to said structure, the upstream side exhaust gear that comprises emission-control equipment can be disposed at engine room compactly and not sacrifice space, car chamber, and when driving engine low temperature, the temperature of the catalyst in the emission-control equipment is risen early.
Description of drawings
Fig. 1 is that expression embodiment 1 related exhaust gear of the present utility model is loaded into the birds-eye view under the state of vehicle.
Fig. 2 is that the above-mentioned exhaust gear of expression is loaded into the lateral plan when vehicle left side is observed under the state of vehicle.
Fig. 3 is the birds-eye view of branch pipe cutting of the upstream portion of expression upstream side exhaust gear of above-mentioned exhaust gear and downstream freeing pipe.
Fig. 4 is the lateral plan when vehicle left side is observed of branch pipe cutting of the upstream portion of expression upstream side exhaust gear of above-mentioned exhaust gear and downstream freeing pipe.
Fig. 5 is the figure when vehicle rear-side is observed of branch pipe cutting of the upstream portion of expression upstream side exhaust gear of above-mentioned exhaust gear and downstream freeing pipe.
Fig. 6 is in the related exhaust gear of expression embodiment of the present utility model 2, the birds-eye view of the branch pipe cutting of the upstream portion of upstream side exhaust gear and downstream freeing pipe.
Fig. 7 is in the related exhaust gear of expression embodiment of the present utility model 2, the lateral plan when vehicle left side is observed of the branch pipe cutting of the upstream portion of upstream side exhaust gear and downstream freeing pipe.
Fig. 8 is in the related exhaust gear of expression embodiment of the present utility model 2, the figure when vehicle rear-side is observed of the branch pipe cutting of the upstream portion of upstream side exhaust gear and downstream freeing pipe.
Fig. 9 is in the related exhaust gear of expression embodiment of the present utility model 3, the birds-eye view of the branch pipe cutting of the upstream portion of upstream side exhaust gear and downstream freeing pipe.
Figure 10 is in the related exhaust gear of expression embodiment of the present utility model 3, the lateral plan when vehicle left side is observed of the branch pipe cutting of the upstream portion of upstream side exhaust gear and downstream freeing pipe.
Figure 11 is in the related exhaust gear of expression embodiment of the present utility model 3, the figure when vehicle rear-side is observed of the branch pipe cutting of the upstream portion of upstream side exhaust gear and downstream freeing pipe.
Figure 12 is in the related exhaust gear of expression embodiment of the present utility model 4, the birds-eye view of the branch pipe cutting of the upstream portion of upstream side exhaust gear and downstream freeing pipe.
Figure 13 is in the related exhaust gear of expression embodiment of the present utility model 4, the lateral plan when vehicle left side is observed of the branch pipe cutting of the upstream portion of upstream side exhaust gear and downstream freeing pipe.
Figure 14 is in the related exhaust gear of expression embodiment of the present utility model 4, the figure when vehicle rear-side is observed of the branch pipe cutting of the upstream portion of upstream side exhaust gear and downstream freeing pipe.
The specific embodiment
Below, describe embodiment of the present utility model in detail based on accompanying drawing.
(embodiment 1)
Fig. 1 and Fig. 2 represent the exhaust gear E that embodiment of the present utility model 1 is related, and this exhaust gear E is the exhaust gear of transverse engine 1.This driving engine 1 is array 4 Cylinder engines with four cylinders 2 of row shape, its with the bank of cylinder direction in the engine room 19 of state landscape configuration in the front portion of vehicle of overall width direction (left and right directions of Fig. 1).Below, to be called the vehicle right side corresponding to the right side of the vehicle on the right side (the paper dorsal part of Fig. 2) of Fig. 1, to be called vehicle left side corresponding to the left side of the vehicle in the left side (the paper table side of Fig. 2) of Fig. 1, to be called vehicle front side corresponding to the front side of the vehicle of the upside (left side of Fig. 2) of Fig. 1, will be called vehicle rear-side corresponding to the rear side of the vehicle of the downside (right side of Fig. 2) of Fig. 1.
Above-mentioned driving engine 1 disposes near vehicle right side (right side of Fig. 1) in engine room 19.In addition, this driving engine 1 with the axis of each cylinder 2 to vehicle top and rear side bevelled state configuration.
Bank of cylinder direction one side (being vehicle left side (left side of Fig. 1) in the present embodiment) at above-mentioned driving engine 1 is combined with change-speed box 11, constitutes engine installation 12 by above-mentioned driving engine 1 with change-speed box 11.This change-speed box 11 is for having omitted the horizontal arrangement type that graphic input shaft and output shaft extend along the overall width direction, above-mentioned input shaft links with the bent axle that extends along the overall width direction of driving engine 1, and above-mentioned output shaft links with the differential attachment 14 of the vehicle rear-side that is configured in change-speed box 11.In addition, though diagram is omitted, the left and right sides front wheel driving shaft that links respectively with left and right sides front-wheel extends to the both sides of overall width direction from this differential attachment 14 respectively.Above-mentioned vehicle is preposition forerunner (FF) car that left and right sides front-wheel is driven by driving engine 1.In addition, above-mentioned vehicle also can be 4 wheel drive vehicles.
In the overall width direction both sides of above-mentioned engine installation 12, be respectively arranged with left side and right-hand stringer 21,22.That is,, be respectively arranged with the left-hand stringer 21 and the right-hand stringer 22 of extending along the vehicle fore-and-aft direction in the tight left side of change-speed box 11 and on the tight right side of driving engine 1.
The vehicle rear-side wall of above-mentioned engine room 19 constitutes by separating the dash shield 23 of this engine room 19 with car chamber 20.This dash shield 23 along the vertical direction and the overall width direction extend.The upper end of dash shield 23 combines with car neck member 24, and the bottom of dash shield 23 combines with the leading section of the base plate 25 of the base plate face that constitutes car chamber 20.
At the overall width direction central portion of above-mentioned base plate 25, the 25a of tunnel portion that swell roughly inverted U-shapedly upward in the cross section extends and forms along the vehicle fore-and-aft direction.And the overall width direction central portion in the bottom of dash shield 23 is formed with in order to link to each other with the above-mentioned tunnel 25a of portion the 23a of tunnel opening portion that cutting upward forms.And a freeing pipe (downstream described later freeing pipe 51) is by the inside (outside of car chamber 20) of the above-mentioned tunnel 25a of portion.In addition, when above-mentioned vehicle was 4 wheel drive vehicles, freeing pipe and back-wheel drive passed through the inside of the 25a of tunnel portion with axle drive shaft.
At the vehicle front side of above-mentioned driving engine 1, be provided with and be used for air inlet is imported inlet manifold 4 in each cylinder 2 of this driving engine 1.This inlet manifold 4 have be communicated with respectively with four cylinders 2 of driving engine 1 and with at four admission ports (not shown) of the face upper shed of the vehicle front side of driving engine 1 bonded assembly 4a～4d of four branched pipe portions respectively, 4a～the 4d of these branched pipe portions is bent to form, to center on the tandem-driving bogie 5 that extends along bank of cylinder direction (overall width direction).
On the other hand, in the vehicle rear-side of driving engine 1, be provided with and be used for the above-mentioned exhaust gear E that waste gas that each cylinder 2 with driving engine 1 generates is discharged.Below, describe the details of this exhaust gear E in detail with reference to Fig. 3～Fig. 5.
Above-mentioned exhaust gear E is by exhaust manifold 31, constitute as the direct-type catalyst 40 and the downstream freeing pipe 51 of the emission-control equipment of driving engine 1, from exhaust-gas upstream side with this serial arrangement.Constitute the upstream side exhaust gear 48 of exhaust gear E by exhaust manifold 31 and direct-type catalyst 40, this upstream side exhaust gear 48 is incorporated in the above-mentioned engine room 19.
Exhaust manifold 31 comprises: four branched pipe portions 32 that are communicated with respectively with four cylinders 2 of driving engine 1, make convergence tube portions 33 in the middle of each two two of merging mutually of these four branched pipe portions 32 and make these two in the middle of the independent single freeing pipe portion 34 that merges each other of convergence tube portions 33.End in the exhaust downstream of this single freeing pipe portion 34 is connected with direct-type catalyst 40.
Below, with four cylinders 2 by from the opposition side (vehicle right side) of change-speed box 11 order to change-speed box 11 sides (vehicle left side), be called the first cylinder 2a, the second cylinder 2b, the 3rd cylinder 2c and four-cylinder 2d (when it not being distinguished, only being called cylinder 2 sometimes).In addition, the branched pipe portion 32 that will be communicated with respectively with first cylinder 2a～four-cylinder 2d is called first～the 4th 32a～32d of branched pipe portion (when it not being distinguished, only being called branched pipe portion 32 sometimes) respectively.
The end of the exhaust-gas upstream side of above-mentioned first～the 4th 32a～32d of branched pipe portion by a flange part 36 that extends along the overall width direction that is that all 32a～32d of branched pipe portion are shared, is connected with the face of the vehicle rear-side of driving engine 1.Promptly, mounting flange portion 36 on the face of the vehicle rear-side of driving engine 1, by this flange part 36, the end of the exhaust-gas upstream side of above-mentioned first～the 4th 32a～32d of branched pipe portion, be connected respectively with four exhausr ports (not shown) in the face upper shed of the vehicle rear-side of driving engine 1, first cylinder 2a～four-cylinder 2d and first～the 4th 32a～32d of branched pipe portion is communicated with respectively.
Above-mentioned flange part 36 has a plurality of (in the present embodiment the being five) junction surface 37 on the face of the vehicle rear-side that links such as utilizing bolt is bonded on driving engine 1.These junction surfaces 37 are inserted logical inserting hole by links such as bolts and are constituted.Below, with these five junction surfaces 37, be called first～the 5th junction surface 37a～37e (when it not being distinguished, only being called junction surface 37 sometimes) successively from the vehicle right side.
The first junction surface 37a is configured on the flange part 36 (vehicle right side) the cooresponding position, the overall width direction outside with the first cylinder 2a, the second junction surface 37b be configured on the flange part 36 and the first cylinder 2a and the second cylinder 2b between cooresponding position, the 3rd junction surface 37c be configured on the flange part 36 and the second cylinder 2b and the 3rd cylinder 2c between cooresponding position, the 4th junction surface 37d is configured on the flange part 36 and cooresponding position between the 3rd cylinder 2c and the four-cylinder 2d, and the 5th junction surface 37e is configured on the flange part 36 (vehicle left side) the cooresponding position, the overall width direction outside with four-cylinder 2d.Above-mentioned first～the 5th junction surface 37a～37e is arranged in two row along the junction surface that overall width direction (bank of cylinder direction) is extended that come devices spaced apart on the short transverse, the row at junction surface that comprise the upside of the second and the 4th junction surface 37b, 37d are configured near first height and position the upper end of flange part 36, and the row at junction surface that comprise the downside of the first, the 3rd and the 5th junction surface 37a, 37c, 37e are configured near second height and position the lower end of flange part 36.Thus, the second and the 4th junction surface 37b, 37d just are equivalent to be configured in the high-order junction surface on first height and position, and the first, the 3rd and the 5th junction surface 37a, 37c, 37e just are equivalent to be configured in the low level junction surface on second height and position that is lower than first height and position.And first～the 5th junction surface 37a～37e is configured to zig-zag, make upside row junction surface 37 and the adjoining junction surface 37 of the row of downside between cooresponding position.
Convergence tube portion 33 divides for two groups of cylinder group by mutually discontinuous two cylinders, 2 formations of exhaust stroke (explosion stroke) with all cylinders 2 in the middle of above-mentioned, and by above-mentioned every group of cylinder group the branched pipe portion 32 that is communicated with respectively with two cylinders 2 of this cylinder group is merged each other.In the present embodiment, because exhaust stroke is with the first cylinder 2a, the 3rd cylinder 2c, four-cylinder 2d, and the order of the second cylinder 2b is carried out, therefore, just divide for cylinder group that constitutes by the first cylinder 2a and four-cylinder 2d and the cylinder group that constitutes by the second cylinder 2b and the 3rd cylinder 2c, just be provided with and make the first and the 4th 32a of branched pipe portion that is communicated with respectively with the first cylinder 2a and four-cylinder 2d, the middle convergence tube portion 33 that 32d merges each other, and make the 32b of second and third branched pipe portion that is communicated with respectively with the second cylinder 2b and the 3rd cylinder 2c, the middle convergence tube portion 33 that 32c merges each other.Below, the convergence tube 33a of portion in the middle of the middle convergence tube portion 33 that makes that the first and the 4th 32a of branched pipe portion, 32d merge each other is called first, the convergence tube 33b of portion (when it not being distinguished, convergence tube portion 33 in the middle of only being called sometimes) in the middle of the middle convergence tube portion 33 that makes that the 32b of second and third branched pipe portion, 32c merge each other is called second.
First～the 4th 32a～32d of branched pipe portion extends to vehicle rear-side basically from the face (being flange part 36 strictly) of the vehicle rear-side of driving engine 1.Particularly, first 32a of branched pipe portion overlooks down behind the extending towards vehicle rear-side of the vehicle rear-side of above-mentioned driving engine 1, and left side is extended behind vehicle.The 4th 32d of branched pipe portion overlooks down behind the extending towards vehicle rear-side of the vehicle rear-side of above-mentioned driving engine 1 right side diagonally extending behind vehicle.And in the overall width direction position roughly the same with above-mentioned the 3rd junction surface 37c, above-mentioned first 32a of branched pipe portion and the 4th 32d of branched pipe portion converge, the convergence tube 33a of portion in the middle of the exhaust downstream of this fluidic junction forms first.In addition, second 32b of branched pipe portion overlooks down behind the extending towards vehicle rear-side of the vehicle rear-side of above-mentioned driving engine 1, right side diagonally extending behind vehicle, and in the middle of second the front of the convergence tube 33b of portion to the opposition side bending, thereby left side is extended behind vehicle.The 3rd 32c of branched pipe portion overlooks down behind the extending towards vehicle rear-side of the vehicle rear-side of above-mentioned driving engine 1 right side diagonally extending behind vehicle.And in the overall width direction position roughly the same with the above-mentioned second junction surface 37b, above-mentioned second 32b of branched pipe portion and the 3rd 32c of branched pipe portion converge, the convergence tube 33b of portion in the middle of the exhaust downstream of this fluidic junction forms second.In addition, the 32b of second and third branched pipe portion, 32c extend from the vehicle left side of first 32a of branched pipe portion to the right by the downside of first 32a of branched pipe portion.
In the present embodiment, in the middle of first and second end (fluidic junction of the fluidic junction of first 32a of branched pipe portion and the 4th 32d of branched pipe portion and second 32b of branched pipe portion and the 3rd 32c of branched pipe portion) of the exhaust-gas upstream side of the convergence tube 33a of portion, 33b in the configuration that misplaces mutually of overall width direction.That is, the end (fluidic junction of first 32a of branched pipe portion and the 4th 32d of branched pipe portion) of the exhaust-gas upstream side of the first middle convergence tube 33a of portion is positioned at vehicle left side (change-speed box 11 sides) with respect to the end (fluidic junction of second 32b of branched pipe portion and the 3rd 32c of branched pipe portion) of the exhaust-gas upstream side of the second middle convergence tube 33b of portion.The height and position of the end of the exhaust-gas upstream side of the height and position of the end of the exhaust-gas upstream side of the convergence tube 33a of portion and the second middle convergence tube 33b of portion is roughly the same (strictly in the middle of first, height and position a little more than the end of the exhaust-gas upstream side of the convergence tube 33b of portion in the middle of second), be lower than the position of the 3rd junction surface 37c.In view of the above, as shown in Figure 5, can make the position and the positive upper portion thereof at the junction surface 37 (particularly the 3rd junction surface 37c) of flange part 36, from vehicle rear-side, not overlapping with each branched pipe portion 32 and each centre convergence tube portion 33.Consequently, can guarantee the space of the connection operation that each junction surface 37 (particularly the 3rd junction surface 37c) is located, link can be configured to the position at each junction surface 37 from the upside of driving engine 1, be easy to carry out attended operation.
Above-mentioned in the middle of first and second convergence tube 33a of portion, 33b form single freeing pipe portion 34 in the exhaust downstream of its fluidic junction also to converge mutually towards the state of overall width direction one side (be vehicle left side under the situation of present embodiment, be change-speed box 11 sides) is crooked in the exhaust downstream of overlooking down the convergence tube 33a of portion, 33b in the middle of first and second.That is, the first middle convergence tube 33a of portion extends the back to the vehicle left side bending from the end of its exhaust-gas upstream side to vehicle rear-side; The convergence tube 33b of portion, passes the downside of the end of the exhaust-gas upstream side of the convergence tube 33a of portion in the middle of first and extends to vehicle left side directly to the vehicle left side bending from the end of its exhaust-gas upstream side in the middle of second.And the convergence tube 33a of portion, 33b become single freeing pipe portion 34 each other in that (near the overall width direction central authorities of engine room 19) converge in the position roughly the same with four-cylinder on the overall width direction in the middle of first and second.In view of the above, single freeing pipe portion 34 just is arranged at the exhaust downstream of branched pipe portion 32, is communicated with four 32a～32d of branched pipe portion via the convergence tube 33a of portion, 33b in the middle of first and second.
Above-mentioned single freeing pipe portion 34 is with the state bending towards vehicle front side in the exhaust downstream of overlooking down single freeing pipe portion 34, and is connected with direct-type catalyst 40.The part in the exhaust downstream of this single freeing pipe portion 34 is with the state bending towards the preceding right side of vehicle, and single freeing pipe portion 34 constitutes the curved shape that protrude to the opposition side (vehicle left side) of direct-type catalyst 40 sides with respect to both ends intermediate portions.The end in the exhaust downstream of single freeing pipe portion 34 for identical with the diameter of the housing described later 41 of direct-type catalyst 40 and by hole enlargement, is connected with the end face (end face of vehicle left side) of the exhaust-gas upstream side of this housing 41.
Above-mentioned direct-type catalyst 40 is configured in the vehicle rear-side of driving engine 1, and to overlook the state configuration that lower house 41 interior gas flow paths roughly extend along the overall width direction.In view of the above, housing 41 roughly extends along the face of the vehicle rear-side of driving engine 1.In addition, in the present embodiment, strictly, housing 41 (gas flow path) with the closer to vehicle left side (exhaust-gas upstream side) and offset slightly tilt to the mode of vehicle rear-side.This is for as described later, makes the gas of end face 43a that the exhaust-gas upstream side of portion 43 is set with respect to catalyst enter angle as far as possible near 90 °.In addition, housing 41 (gas flow path) is so that (exhaust downstream) and offset slightly tilt to the mode of downside the closer to the vehicle right side.This is because downstream freeing pipe 51 is positioned at the downside of the convergence tube 33b of portion in the middle of second and third branching portion 32b, 32c and second, thereby will avoid the interference with these each parts (32b, 32c, 33b).
In addition, direct-type catalyst 40 is in the gas flow path in the housing 41 of general cylindrical shape catalyst to be set to form.The cross section that catalyst in the gas flow path in this housing 41 is provided with portion 43 is a circular, the end face 43b that catalyst is provided with the end face 43a of exhaust-gas upstream side (vehicle left side) of portion 43 and exhaust downstream (vehicle right side) is respectively and roughly the same of the end face in the end face of the exhaust-gas upstream side of housing 41 and exhaust downstream, or relatively is positioned at the face of the inboard of housing 41 with it slightly.Above-mentioned catalyst is a three-way catalyst, is used in particular for realizing when driving engine 1 low temperature the purification of HC and CO, therefore, direct-type catalyst 40 is located at the upstream side exhaust gear 48 of exhaust gear E.In addition, catalyst cross sectional shape that portion 43 is set is not limited to circular.
In the present embodiment, direct-type catalyst 40 is supported by the face of the vehicle rear-side of driving engine 1.Promptly, on housing 41, be fixed with side-prominent projecting part 41a downwards, between the face of the vehicle rear-side of this projecting part 41a and driving engine 1, be provided with to observe and constitute roughly to fall L shaped support component 44 from upside, by this support component 44, direct-type catalyst 40 is supported by the face of the vehicle rear-side of driving engine 1.In addition, this direct-type catalyst 40 might not be supported by driving engine 1.
Above-mentioned downstream freeing pipe 51 is connected with the end face (end face on vehicle right side) in the exhaust downstream of the housing 41 of above-mentioned direct-type catalyst 40.The state setting of this downstream freeing pipe 51 to extend to the 23a of tunnel opening portion of the overall width direction central portion of the bottom that is formed at dash shield 23 from connecting portion (end of exhaust-gas upstream side) with 40 bindings of direct-type catalyst.Promptly, overlook down, downstream freeing pipe 51 in the end of its exhaust-gas upstream side to the vehicle rear-side bending and after rear view of vehicle extends, left side (the overall width direction center side of engine room 19) diagonally extending behind vehicle, extend to vehicle rear-side from the front of the 23a of tunnel opening portion, enter in the 25a of tunnel portion from the 23a of tunnel opening portion.This downstream freeing pipe 51 constitutes by be divided into a plurality of a plurality of minutes pipe cuttings 52 along its length direction.Two adjoining branch pipe cuttings 52 flange 52a of the connection end by being formed at these two branch pipe cuttings 52 each other are connected to each other.In addition, in Fig. 1 and Fig. 2, only represent the part of branch pipe cutting 52 in the branch pipe cutting 52 of upstream portion and next-door neighbour's thereof exhaust downstream, omitted other minutes pipe cutting record of 52.In addition, in Fig. 3～Fig. 5, only represented the branch pipe cutting 52 of upstream portion.
The part in the exhaust downstream of above-mentioned single freeing pipe portion 34 is stretched out to vehicle left side with respect to the end face 43a that the catalyst of direct-type catalyst 40 is provided with the exhaust-gas upstream side of portion 43; The part of the exhaust-gas upstream side of above-mentioned downstream freeing pipe 51 is stretched out to the vehicle right side with respect to the end face 43b that catalyst is provided with the exhaust downstream of portion 43.And, above-mentioned single freeing pipe portion 34 is provided with the maximum overhang to the overall width direction of end face 43a of the exhaust-gas upstream side of portion 43 with respect to above-mentioned catalyst, the maximum overhang to the overall width direction of end face 43b in the exhaust downstream of portion 43 is set with respect to above-mentioned catalyst greater than above-mentioned downstream freeing pipe 51, enter angle so that the gas of end face 43a of the exhaust-gas upstream side of portion 43 is set with respect to above-mentioned catalyst, discharge angle (promptly near 90 °) greater than the gas of the end face 43b in the exhaust downstream that portion 43 is set with respect to this catalyst.Described gas enters the angle of the acute side in the angle that angle is meant that " entering the waste gas that catalyst is provided with portion 43 through single freeing pipe portion 34 " and " catalyst is provided with the end face 43a of the exhaust-gas upstream side of portion 43 " constituted, and described gas is discharged the angle of the acute side the angle that angle is meant that " the end face 43b that catalyst is provided with the exhaust downstream of portion 43 " and " waste gas that portion 43 is discharged into downstream freeing pipe 51 being set from catalyst " constituted.Promptly, the part in the exhaust downstream by making single freeing pipe portion 34, compare with the part of the exhaust-gas upstream side of downstream freeing pipe 51, its inclination with respect to the bearing of trend of housing 41 (catalyst is provided with portion 43) is littler and longer along the extension of the bearing of trend of housing 41 (catalyst is provided with portion 43), enter angle as far as possible near 90 ° so that the gas of end face 43a of the exhaust-gas upstream side of portion 43 is set with respect to catalyst, make to enter diffusion equably on waste gas that catalyst is provided with portion 43 is provided with portion 43 at catalyst the whole cross section.
The branch pipe cutting 52 of upstream portion has flexible-disc joint 53 in the above-mentioned downstream freeing pipe 51.This flexible-disc joint 53 is positioned at the 25a of tunnel portion, absorbs the vibration of driving engine 1 and follows the vibration of driving engine 1 and the vibration of the above-mentioned upstream side exhaust gear 48 that produces, makes these vibrations can not be delivered to the part in the exhaust downstream of flexible-disc joint 53.In addition, the quantity of flexible-disc joint 53 is not limited to one, also a plurality of flexible-disc joints 53 can be provided with (with reference to embodiment 3 described later and 4) along the spaced-apart interval series connection of the length direction of downstream freeing pipe 51.
The branch pipe cutting 52 of above-mentioned upstream portion supports at the part in the exhaust downstream of flexible-disc joint 53 vehicle body (base plate 25) by vehicle.Promptly, slender rod shaped support component 55 bendings are roughly trapezoidal for overlooking down, the top portion of this support component 55 is fixed near the flange 52a of branch pipe cutting 52 of upstream portion, the both side ends of the following portion of support component 55 is outstanding to the overall width direction outside respectively, and the outstanding end of this both side ends is installed on the base plate 25 by elastomeric element 56.In addition, when being provided with a plurality of flexible-disc joint 53 on the branch pipe cutting 52 of upstream portion, the part in the exhaust downstream of the flexible-disc joint 53 of downstream portion is got final product by the branch pipe cutting 52 that vehicle body supports upstream portion.
With the branch pipe cutting 52 in branch pipe cutting 52 next-door neighbours' of above-mentioned upstream portion exhaust downstream on, be provided with following catalyst 60 with direct-type catalyst 40 same structures.The catalyst of this time catalyst 60 is identical with direct-type catalyst 40, is three-way catalyst, but mainly realizes the purification of NOx.The branch pipe cutting 52 that is provided with this time catalyst 60 is also with the support form identical with the branch pipe cutting 52 of upstream portion, supported by the vehicle body (base plate 25) of vehicle.
In the present embodiment, constitute the branched pipe portion 32 of the upstream side exhaust gear 48 of exhaust gear E, middle convergence tube portion 33, single freeing pipe portion 34 and direct-type catalyst 40, by be formed in overlook down with towards exhaust downstream cw around ring-type, the length that can prolong branched pipe portion 32 and middle convergence tube portion 33 to be improving exhaust efficiency, and can dispose the upstream side exhaust gear 48 that comprises direct-type catalyst 40 compactly in the vehicle rear-side of driving engine 1.And middle convergence tube portion 33 is with the direction of overlooking down its exhaust downstream lateral approach change-speed box 11 that is to the state bending of overall width direction one side (vehicle left side), and therefore single freeing pipe portion 34 just is configured in than branched pipe portion 32 more near the position of change-speed box 11.In view of the above, upstream side exhaust gear 48 is left be configured in usually the sidewall on the vehicle right side of auxiliary mechanism's (water pump etc.) on driving engine 1 and faces change-speed box 11 side opposition sides or engine room 19 to dispose (longeron etc.).As a result, can realize favourable spatial allocation and avoid interference with auxiliary mechanism or longeron etc., and can suppress the influence of radiant heat the sidewall on the vehicle right side of auxiliary mechanism or engine room 19.In addition,, in the 25a of tunnel portion, also only pass independent downstream freeing pipe 51 and get final product, needn't enlarge the sectional area of the 25a of tunnel portion, can prevent that the space of car chamber 20 from diminishing even prolonged the length of branched pipe portion 32 and middle convergence tube portion 33.
Herein, upstream side exhaust gear 48 constitutes ring-type, thereby compare with linearity might be unfavorable to some extent aspect resistance of exhaust, but dispose upstream side exhaust gear 48 as described above, the diameter of ring-type can be formed bigger, therefore resistance of exhaust just is a problem hardly, improves effect owing to prolonged the exhaust efficiency that the length of branched pipe portion 32 and middle convergence tube portion 33 brings on the contrary, can improve the output of driving engine 1.
In addition, because direct-type catalyst 40 being configured in the vehicle rear-side of driving engine 1 closely is close to, therefore, vehicle ' wind is difficult to brush direct-type catalyst 40, when driving engine 1 low temperature the temperature of the catalyst of direct-type catalyst 40 is further risen early.
In addition, the vehicle front side of (end of the exhaust-gas upstream side of single freeing pipe portion 34) and the downside of branched pipe the portion 32 because connecting portion of convergence tube portion 33 and single freeing pipe portion 34 in the middle of direct-type catalyst 40 is configured in, thereby the direct-type catalyst 40 that weight is bigger is configured in closely being close to of driving engine 1, therefore with direct-type catalyst 40, compare during away from driving engine 1 configuration, can reduce the vibration of following driving engine 1 and the vibration of the upstream side exhaust gear 48 that produces.And, in the present embodiment, because the face by the vehicle rear-side of driving engine 1 supports direct-type catalyst 40, therefore can stable support upstream side exhaust gear 48, can further reduce the vibration of following driving engine 1 and the vibration of the upstream side exhaust gear 48 that produces.
In addition, because end of the exhaust-gas upstream side of the convergence tube 33a of portion, 33b so can be so that there be branched pipe portion 32 in the upside in these ends in the configuration that misplaces mutually of overall width direction in the middle of first and second.In addition, the end of the exhaust-gas upstream side of single freeing pipe portion 34 (in the middle of first in the middle of the convergence tube 33a of portion and second fluidic junction of the convergence tube 33b of portion) the also end with respect to the exhaust-gas upstream side of the convergence tube 33a of portion, 33b in the middle of first and second disposes in the dislocation of overall width direction, so there are not the parts of exhaust gear E at the upside of these all ends.Therefore, can carry out once all branched pipe portions 32 and middle convergence tube portion 33 welding, and in the middle of the welding of convergence tube portion 33 and single freeing pipe portion 34, can increase productivity.
(embodiment 2)
Fig. 6～Fig. 8 represents embodiment 2 of the present utility model, the position of the end (fluidic junction of the fluidic junction of first 32a of branched pipe portion and the 4th 32d of branched pipe portion and second 32b of branched pipe portion and the 3rd 32c of branched pipe portion) of the exhaust-gas upstream side of the convergence tube 33a of portion, 33b concerns in the middle of first and second, and is different with above-mentioned embodiment 1.
That is, in the present embodiment, the end of the exhaust-gas upstream side of the convergence tube 33a of portion, 33b all is configured in the roughly the same position with the 3rd junction surface 37c on the overall width direction in the middle of first and second, in the above-below direction configuration that misplaces mutually.Particularly, first 32a of branched pipe portion is identical with above-mentioned embodiment 1 with the method for converging of the 4th 32d of branched pipe portion, but second 32b of branched pipe portion and the 3rd 32c of branched pipe portion are behind the extending towards vehicle rear-side of the vehicle rear-side of driving engine 1, near each other, on the overall width direction, converging with the roughly the same position of the 3rd junction surface 37c.And the end of the exhaust-gas upstream side of the first middle convergence tube 33a of portion is positioned at the positive downside of the end of the exhaust-gas upstream side of the convergence tube 33b of portion in the middle of second, overlooks down overlapping each other.The height and position of the end of the exhaust-gas upstream side of the convergence tube 33a of portion is identical with above-mentioned embodiment 1 in the middle of first, be in the position that is lower than the 3rd junction surface 37c, but the height and position of the end of the exhaust-gas upstream side of the convergence tube 33b of portion is in the position that is higher than the 3rd junction surface 37c in the middle of second.In view of the above, as shown in Figure 8, can make the position of the 3rd junction surface 37c of flange part 36, from vehicle rear-side, not overlapping with each branched pipe portion 32 and each centre convergence tube portion 33, the connection operation at 37c place, the 3rd junction surface can be carried out from this vehicle rear-side.But, when vehicle rear-side is observed, because the positive upper portion and the 3rd 32c of branched pipe portion of the position of the 3rd junction surface 37c of flange part 36 are overlapping, therefore be difficult to carry out link is configured to the operation of the position of the 3rd junction surface 37c from the upside of driving engine 1, to compare attended operation slightly poor with above-mentioned embodiment 1.On the other hand, when vehicle rear-side is observed, because the position at the junction surface 37 except that the 3rd junction surface 37c (37a, b, d, e) of flange part 36 and positive upper portion thereof, not overlapping with each branched pipe portion 32 and each centre convergence tube portion 33, therefore on the junction surface 37 except that the 3rd junction surface 37c, can obtain the attended operation identical with above-mentioned embodiment 1.
Above-mentioned in the middle of first and second convergence tube 33a of portion, 33b with crooked and converge mutually towards the state of overall width direction one side (vehicle left side, be change-speed box 11 sides) in the exhaust downstream of overlooking down the convergence tube 33a of portion, 33b in the middle of first and second.That is, the convergence tube 33a of portion, 33b overlook under the state that is overlapping each other down in the middle of first and second,, crookedly extend to vehicle left side and to vehicle left side after vehicle rear-side is extended from the end of its exhaust-gas upstream side.And the convergence tube 33a of portion, 33b are converging with the roughly the same position of four-cylinder 2d on the overall width direction each other in the middle of first and second, form single freeing pipe portion 34 in the exhaust downstream of its fluidic junction.
The structure of engine installation 12, single freeing pipe portion 34, direct-type catalyst 40 and downstream freeing pipe 51 and configuration are identical with above-mentioned embodiment 1.In addition, in the present embodiment, housing 41 (gas flow path) tilts to the vehicle left rear side unlike above-mentioned embodiment 1.This be because, because single freeing pipe portion 34 is provided with the maximum overhang to the overall width direction of end face 43a of the exhaust-gas upstream side of portion 43 with respect to catalyst, cooresponding maximum overhang greater than above-mentioned embodiment 1, even housing 41 is tilted to vehicle rear-side towards vehicle left side ground, also can make the gas of end face 43a that the exhaust-gas upstream side of portion 43 is set with respect to catalyst enter angle near 90 °.
As mentioned above, in the present embodiment, same with above-mentioned embodiment 1, overlook down the formation ring-type owing to constitute the branched pipe portion 32 of the upstream side exhaust gear 48 of exhaust gear E, middle convergence tube portion 33, single freeing pipe portion 34 and direct-type catalyst 40, and middle convergence tube portion 33 is with in the direction of overlooking its exhaust downstream lateral approach change-speed box 11 down that is to the state bending of overall width direction one side (vehicle left side), therefore can obtain the action effect identical with above-mentioned embodiment 1.
In addition, because end of the exhaust-gas upstream side of the convergence tube 33a of portion, 33b overlaps each other under overlooking in the middle of first and second, therefore can effectively utilize the space of above-below direction, can make the radius of curvature of first and second middle convergence tube 33a of portion, 33b roughly the same and bigger.
(embodiment 3)
Fig. 9～Figure 11 represents embodiment 3 of the present utility model, position of the end (fluidic junction of the fluidic junction of first 32a of branched pipe portion and the 4th 32d of branched pipe portion and second 32b of branched pipe portion and the 3rd 32c of branched pipe portion) of the exhaust-gas upstream side of the convergence tube 33a of portion, 33b relation is further different in the middle of first and second.
Promptly, in the present embodiment, the end and the above-mentioned embodiment 2 of the exhaust-gas upstream side of the convergence tube 33a of portion, 33b are configured in the roughly the same position with the 3rd junction surface 37c in the overall width direction in the same manner in the middle of first and second, but end of the exhaust-gas upstream side of the convergence tube 33a of portion, 33b does not overlap each other under overlooking in the middle of first and second, misplaces mutually at the vehicle fore-and-aft direction.Particularly, the length of the vehicle fore-and-aft direction of the 32b of second and third branched pipe portion, 32c, be longer than the length of the vehicle fore-and-aft direction of the first and the 4th 32a of branched pipe portion, 32d, the end (fluidic junction of second 32b of branched pipe portion and the 3rd 32c of branched pipe portion) of the exhaust-gas upstream side of the second middle convergence tube 33b of portion is positioned at the vehicle rear-side of the end (fluidic junction of first 32a of branched pipe portion and the 4th 32d of branched pipe portion) of the exhaust-gas upstream side of the convergence tube 33a of portion in the middle of first.And the height and position of the end of the exhaust-gas upstream side of the convergence tube 33a of portion is roughly the same in the middle of the height and position of the end of the exhaust-gas upstream side of the second middle convergence tube 33b of portion and first, is in the position that is lower than the 3rd junction surface 37c.In view of the above, as shown in figure 11, when vehicle rear-side is observed, the position of the 3rd junction surface 37c of flange part 36 and positive upper portion thereof, same with other junction surfaces 37 (37a, b, d, e), with each branched pipe portion 32 and in the middle of each convergence tube portion 33 not overlapping.
In addition, also the height and position of the end of the exhaust-gas upstream side of the convergence tube 33b of portion in the middle of second can be made as the height and position identical, promptly be higher than the position of the 3rd junction surface 37c with above-mentioned embodiment 2.At this moment, because the position of the end of the exhaust-gas upstream side of the convergence tube 33b of portion is compared with embodiment 2 and is positioned at vehicle rear-side in the middle of second, therefore there is the possibility of operation that is easy to carry out link is configured to from the upside of driving engine 1 position of the 3rd junction surface 37c, but when the height and position that makes the end of the exhaust-gas upstream side of the convergence tube 33b of portion in the middle of second basically was in the position that is lower than the 3rd junction surface 37, attended operation just can be higher.
Above-mentioned in the middle of first and second convergence tube 33a of portion, 33b with crooked and converge mutually towards the state of overall width direction one side (vehicle left side, be change-speed box 11 sides) in the exhaust downstream of overlooking down the convergence tube 33a of portion, 33b in the middle of first and second.That is, in the middle of first the convergence tube 33a of portion after vehicle rear-side was extended, the lower position of the end of the exhaust-gas upstream side of the convergence tube 33b of portion was crooked and extend to vehicle left side to vehicle left side in the middle of second from the end of its exhaust-gas upstream side; The convergence tube 33b of portion, extends by the vehicle rear-side of the first middle convergence tube 33a of portion and to vehicle left side directly to the vehicle left side bending from the end of its exhaust-gas upstream side in the middle of second.And the convergence tube 33a of portion, 33b are converging with the roughly the same position of four-cylinder 2d in the overall width direction each other in the middle of first and second, become single freeing pipe portion 34.
The structure of engine installation 12, single freeing pipe portion 34 and direct-type catalyst 40 and configuration are identical with above-mentioned embodiment 1 or 2.
In the present embodiment, overlook down, downstream freeing pipe 51 in the end of its exhaust-gas upstream side after the vehicle rear-side bending, left side (the overall width direction center side of engine room 19) diagonally extending behind vehicle, and keep this heeling condition and enter in the 25a of tunnel portion.And this downstream freeing pipe 51 is with its state configuration of dividing by the vehicle right side of the 25a of tunnel portion.In addition, can only support component 55 and elastomeric element 56 be set on the vehicle right side of downstream freeing pipe 51.This is because though this vehicle is preposition front drive vehicle, in order to change to 4 wheel drive vehicles easily, and kept the space that back-wheel drive passes through with axle drive shaft (space of vehicle left side) in the 25a of tunnel portion.By like this, when changing to 4 wheel drive vehicles, can not change downstream freeing pipe 51 or support component 55 etc. and just axle drive shaft can be set.
In addition, in the present embodiment, the branch pipe cutting 52 of the upstream portion of downstream freeing pipe 51 way therein has two flexible-disc joints 53 that the series connection of spaced-apart interval is provided with on downstream freeing pipe 51 length direction of (dividing pipe cutting 52).The flexible-disc joint 53 in exhaust downstream is configured in the 25a of tunnel portion, but the flexible-disc joint 53 of exhaust-gas upstream side is configured in the engine room 19.
As mentioned above, in the present embodiment, same with above-mentioned embodiment 1, overlook down the formation ring-type owing to constitute the branched pipe portion 32 of the last two trip side exhaust gears 48 of exhaust gear E, middle convergence tube portion 33, single freeing pipe portion 34 and direct-type catalyst 40, and middle convergence tube portion 33 is with the direction of overlooking down its exhaust downstream lateral approach change-speed box 11 that is to the state bending of overall width direction one side (vehicle left side), therefore can obtain the action effect identical with above-mentioned embodiment 1.
(embodiment 4)
Figure 12～Figure 14 represents embodiment 4 of the present utility model, in this embodiment 4, saves the middle convergence tube portion 33 in the above-mentioned embodiment 1～3 on exhaust manifold 31, is single freeing pipe portion 34 and whole branched pipe 32a～32d of portion are converged.
That is, in the above-mentioned embodiment 1～3, the position that more is in exhaust-gas upstream side than single freeing pipe portion 34 in the upstream side exhaust gear 48 is made of branched pipe portion 32 and middle convergence tube portion 33, but in the present embodiment, described position only is made of branched pipe portion 32.So single freeing pipe portion 34 converges four 32a～32d of branched pipe portion each other and forms, it is not via middle convergence tube portion 33 and directly be communicated with each branched pipe portion 32.Each branched pipe portion 32 is with the state bending towards overall width direction one side (vehicle left side, i.e. change-speed box 11 sides) of the exhaust downstream of overlooking down this each branched pipe portion 32.Particularly, the 32a of first and second branched pipe portion, 32b are behind the extending towards vehicle rear-side of the vehicle rear-side of driving engine 1, with the state bending towards overall width direction one side (vehicle left side, be change-speed box 11 sides) of the exhaust downstream of overlooking down the 32a of this first and second branched pipe portion, 32b.In addition, the 3rd and the 4th 32c of branched pipe portion, 32d right side diagonally extending behind vehicle immediately behind the extending towards vehicle rear-side of the vehicle rear-side of above-mentioned driving engine 1 is then with the state bending towards overall width direction one side (vehicle left side, be change-speed box 11 sides).And four 32a～32d of branched pipe portion are converging with the roughly the same overall width direction position of the 5th junction surface 37e and are forming single freeing pipe portion 34.
The structure of engine installation 12, single freeing pipe portion 34, direct-type catalyst 40 and downstream freeing pipe 51 and configuration are identical with above-mentioned embodiment 3.
Therefore, in the present embodiment, same with above-mentioned embodiment 1, overlook down the formation ring-type owing to constitute branched pipe portion 32, single freeing pipe portion 34 and the direct-type catalyst 40 of the upstream side exhaust gear 48 of exhaust gear E, and branched pipe portion 32 is with the direction of overlooking down its exhaust downstream lateral approach change-speed box 11 that is to the state bending of overall width direction one side (vehicle left side), therefore can obtain the action effect same with above-mentioned embodiment 1.
In addition, in the above-mentioned embodiment 1～4, be that example is illustrated with the exhaust gear E of 4 Cylinder engines 1 in upright arrangement, but the number of cylinders of driving engine 1 is not limited to four.For example, be not provided with in the middle of the situation lower cylinder number of convergence tube portion 33 be to get final product more than two.In addition, be provided with in the middle of the situation lower cylinder number of convergence tube portion 33 be to get final product more than four.In addition, when centre convergence tube portion 33 is set, also can be according to the number of cylinders of driving engine 1, the quantity (being the group number of cylinder group) of middle convergence tube portion 33 is made as more than three, the quantity (i.e. number of cylinders that cylinder group comprised) of the branched pipe portion 32 of convergence tube portion 33 in the middle of convergeing to is made as more than three.
At last, summary description is based on structure of the present utility model and effect thereof that aforesaid embodiment disclosed.
The exhaust gear of transverse engine of the present utility model is arranged at driving engine, this driving engine have a plurality of cylinders of being the row shape and bank of cylinder direction one side be combined with change-speed box and with bank of cylinder along in the engine room of state landscape configuration at front part of vehicle of overall width direction, above-mentioned exhaust gear has with the face bonded assembly upstream side exhaust gear of the vehicle rear-side of above-mentioned driving engine and is arranged on the downstream freeing pipe in the exhaust downstream of above-mentioned upstream side exhaust gear.Above-mentioned upstream side exhaust gear comprises: a plurality of branched pipe portion is communicated with respectively with above-mentioned a plurality of cylinders and extending towards vehicle rear-side from the vehicle rear-side of above-mentioned driving engine; Single freeing pipe portion is arranged on the exhaust downstream of this branched pipe portion communicatively with above-mentioned a plurality of branched pipe portion; Emission-control equipment is connected with the end in the exhaust downstream of above-mentioned single freeing pipe portion.Above-mentioned emission-control equipment is with the state configuration of overlooking down this emission-control equipment gas inside stream and extending along the overall width direction vehicle rear-side at above-mentioned driving engine, the position that more is in exhaust-gas upstream side than above-mentioned single freeing pipe portion in the above-mentioned upstream side exhaust gear with the exhaust downstream of overlooking down this position to the approaching state of above-mentioned change-speed box to overall width direction one lateral bending song; Above-mentioned single freeing pipe portion is with the state bending towards vehicle front side of the exhaust downstream of overlooking down this single freeing pipe portion, above-mentioned downstream freeing pipe is connected in the end in the exhaust downstream of above-mentioned emission-control equipment, with the state setting towards the tunnel opening portion of the overall width direction central portion of the dash shield bottom that is formed on above-mentioned vehicle of the connecting portion that links from this downstream freeing pipe and this emission-control equipment.
According to said structure, since in the upstream side exhaust gear from branched pipe portion to emission-control equipment till part overlook down the formation ring-type, therefore, the length that both can prolong branched pipe portion (or branched pipe portion and middle convergence tube portion) can dispose the upstream side exhaust gear that contains emission-control equipment in the vehicle rear-side of driving engine again compactly to improve exhaust efficiency.And, the position (branched pipe portion or middle convergence tube portion) that more is in exhaust-gas upstream side than above-mentioned single freeing pipe portion in the upstream side exhaust gear with overlook down its exhaust downstream to the approaching state of change-speed box to overall width direction one lateral bending song, therefore, single freeing pipe portion just is configured in than branched pipe portion more near the position of change-speed box.In view of the above, the upstream side exhaust gear is left be configured in usually the auxiliary mechanism's (water pump etc.) on driving engine and the face transmission side opposition side or the sidewall of engine room to dispose (longeron etc.).As a result, can realize favourable spatial allocation and avoid interference with auxiliary mechanism or longeron etc., and can suppress the influence of radiant heat the sidewall of auxiliary mechanism or engine room.In addition,, in tunnel portion, also only pass mono-downstream freeing pipe and get final product, needn't enlarge the sectional area of tunnel portion even prolonged the length of branched pipe portion (or branched pipe portion and middle convergence tube portion).
Herein, the upstream side exhaust gear constitutes ring-type, thereby compare with linearity might be unfavorable to some extent aspect resistance of exhaust, but in the utility model, dispose the upstream side exhaust gear as described above, the diameter of ring-type can be formed bigger, so resistance of exhaust is a problem hardly, improve effect owing to prolonged the exhaust efficiency that the length of branched pipe portion (or branched pipe portion and middle convergence tube portion) brings on the contrary, can improve the output of driving engine.
In addition, the upstream side exhaust gear constitutes ring-type, thereby the extension that het expansion caused of upstream side exhaust gear can be dispersed to the integral body of ring, can prevent the deterioration that stress concentration caused of upstream side exhaust gear.
And the vehicle rear-side that emission-control equipment can be configured in driving engine closely is close to, and in view of the above, vehicle ' wind is difficult to brush emission-control equipment, when driving engine low temperature the temperature of the catalyst in the emission-control equipment is further risen early.
In addition, be configured in closely being close to of driving engine, and emission-control equipment compared during away from engine configurations, can reduce the vibration of the upstream side exhaust gear of following engine vibration and producing by the emission-control equipment that weight is bigger.
In addition, in the utility model, the configuration mode of emission-control equipment comprises: the mode that is configured in the vehicle rear-side of above-mentioned driving engine as above-mentioned embodiment 2 to overlook down the state that this emission-control equipment gas inside stream just extending along the overall width direction; And, under the situation of the above-mentioned effect of performance, as above-mentioned embodiment 1, roughly be configured in the mode of the vehicle rear-side of above-mentioned driving engine along the state of overall width direction extension to overlook down this emission-control equipment gas inside stream.
As mentioned above, exhaust gear according to transverse engine of the present utility model, the upstream side exhaust gear that comprises emission-control equipment can be disposed at engine room compactly and not sacrifice space, car chamber, and when driving engine low temperature, the temperature of the catalyst in the emission-control equipment is risen early.In addition, the extension that het expansion caused of upstream side exhaust gear can be disperseed, and can reduce the vibration of the upstream side exhaust gear of following engine vibration and producing.In addition, can suppress the influence of radiant heat to the sidewall of the auxiliary mechanism of driving engine or engine room.
In the utility model, comparatively it is desirable to, catalyst in the gas flow path of above-mentioned emission-control equipment is provided with the cross section of portion for circular, above-mentioned single freeing pipe portion is provided with the maximum overhang along the overall width direction of end face of the exhaust-gas upstream side of portion with respect to above-mentioned catalyst, the maximum overhang along the overall width direction of end face in the exhaust downstream of portion is set with respect to above-mentioned catalyst greater than above-mentioned downstream freeing pipe, enter angle so that the gas of end face of the exhaust-gas upstream side of portion is set with respect to above-mentioned catalyst, discharge angle greater than the gas of the end face in the exhaust downstream that portion is set with respect to this catalyst.
According to this structure, enter the waste gas of end face that catalyst is provided with the exhaust-gas upstream side of portion and be easy to diffuse to the whole cross section that catalyst is provided with portion fifty-fifty, can promote the exhaust purification effect of the catalyst in the emission-control equipment.In addition, the end face (connecting portion that links with single freeing pipe portion) that catalyst is provided with the exhaust-gas upstream side of portion is provided with the end face in exhaust downstream of portion more near change-speed box than this catalyst, therefore, less with the parts that single freeing pipe portion interferes, can be easy to increase the maximum overhang along overall width direction of single freeing pipe portion with respect to the upstream side end face.
In addition, in the utility model, the cross sectional shape that catalyst is provided with portion comprises: rounded shape; And, under the situation of the above-mentioned effect of performance, be the shape of circular.
In the utility model, comparatively it is desirable to, above-mentioned emission-control equipment is configured in the position that end than the exhaust-gas upstream side of above-mentioned single freeing pipe portion more is in vehicle front side and is positioned at above-mentioned branched pipe subordinate side.
According to this structure, emission-control equipment can be disposed more near driving engine, can further reduce the vibration of the upstream side exhaust gear of following engine vibration and producing.
In this structure, comparatively it is desirable to, above-mentioned emission-control equipment is by above-mentioned motor support, and above-mentioned downstream freeing pipe way therein has flexible-disc joint.
According to this structure, can stable support contain the upstream side exhaust gear of emission-control equipment, can further reduce the vibration of the upstream side exhaust gear of following engine vibration and producing.In addition, the part that more is in upstream side than flexible-disc joint in the exhaust gear is vibrated with driving engine, but its vibration is absorbed by flexible-disc joint, thereby can suppress the situation of transfer of vibration to the part (being fixed in the vehicle body of vehicle usually) in the exhaust downstream of flexible-disc joint.
In the utility model, comparatively it is desirable to, above-mentioned upstream side exhaust gear has middle convergence tube portion between above-mentioned a plurality of branched pipe portions and above-mentioned single freeing pipe portion, convergence tube portion is by dividing for all above-mentioned cylinders a plurality of cylinder group that are made of the mutual discontinuous a plurality of cylinders of exhaust stroke in the middle of above-mentioned, and the branched pipe portion that is communicated with each cylinder in this cylinder group is merged each other by above-mentioned each cylinder group, above-mentioned single freeing pipe portion by make above-mentioned a plurality of in the middle of convergence tube portion merge each other, above-mentioned a plurality of in the middle of convergence tube portion with the exhaust downstream of overlooking down this centre convergence tube portion to the approaching state of above-mentioned change-speed box to overall width direction one lateral bending song.
According to this structure, can obtain best form aspect the raising exhaust efficiency.
In the utility model, comparatively it is desirable to, the position that more is in exhaust-gas upstream side than above-mentioned single freeing pipe portion in the above-mentioned upstream side exhaust gear is made of above-mentioned branched pipe portion, above-mentioned single freeing pipe portion merges each other by making above-mentioned a plurality of branched pipe portion, above-mentioned each branched pipe portion with the exhaust downstream of overlooking down this branched pipe portion to the approaching state of above-mentioned change-speed box to overall width direction one lateral bending song.
According to this structure, convergence tube portion can realize the reduction of exhaust gear cost in the middle of need not.

Claims (8)

1. the exhaust gear of a transverse engine, it is characterized in that: be arranged at driving engine, this driving engine have a plurality of cylinders of being the row shape and bank of cylinder direction one side be combined with change-speed box and with bank of cylinder along in the engine room of state landscape configuration at front part of vehicle of overall width direction
Described exhaust gear has with the face bonded assembly upstream side exhaust gear of the vehicle rear-side of described driving engine and is arranged on the downstream freeing pipe in the exhaust downstream of described upstream side exhaust gear,
Described upstream side exhaust gear comprises:
A plurality of branched pipe portion is communicated with respectively with described a plurality of cylinders and extending towards vehicle rear-side from the vehicle rear-side of described driving engine;
Single freeing pipe portion is arranged on the exhaust downstream of this branched pipe portion communicatively with described a plurality of branched pipe portion;
Emission-control equipment is connected with the end in the exhaust downstream of described single freeing pipe portion; Wherein,
Described emission-control equipment is with the state configuration of overlooking down this emission-control equipment gas inside stream and extending along the overall width direction vehicle rear-side at described driving engine,
More be in the position of exhaust-gas upstream side in the described upstream side exhaust gear than described single freeing pipe portion, with the exhaust downstream of overlooking down this position to the approaching state of described change-speed box to overall width direction one lateral bending song,
Described single freeing pipe portion is with the state bending towards vehicle front side of the exhaust downstream of overlooking down this single freeing pipe portion,
Described downstream freeing pipe is connected in the end in the exhaust downstream of described emission-control equipment, with the state setting towards the tunnel opening portion of the overall width direction central portion of the dash shield bottom that is formed on described vehicle of the connecting portion that links from this downstream freeing pipe and this emission-control equipment.
2. the exhaust gear of transverse engine according to claim 1 is characterized in that:
Catalyst in the gas flow path of described emission-control equipment is provided with the cross section of portion for circular,
Described single freeing pipe portion is provided with the maximum overhang along the overall width direction of end face of the exhaust-gas upstream side of portion with respect to described catalyst, with respect to described catalyst the maximum overhang along the overall width direction of end face in the exhaust downstream of portion is set greater than described downstream freeing pipe, enter angle so that the gas of end face of the exhaust-gas upstream side of portion is set with respect to described catalyst, discharge angle greater than the gas of the end face in the exhaust downstream that portion is set with respect to this catalyst.
3. the exhaust gear of transverse engine according to claim 2 is characterized in that:
Described emission-control equipment is configured in the position that end than the exhaust-gas upstream side of described single freeing pipe portion more is in vehicle front side and is positioned at described branched pipe subordinate side.
4. the exhaust gear of transverse engine according to claim 3 is characterized in that:
Described emission-control equipment is by described motor support,
Described downstream freeing pipe way therein has flexible-disc joint.
5. the exhaust gear of transverse engine according to claim 1 is characterized in that:
Described emission-control equipment is configured in the position that end than the exhaust-gas upstream side of described single freeing pipe portion more is in vehicle front side and is positioned at described branched pipe subordinate side.
6. the exhaust gear of transverse engine according to claim 5 is characterized in that:
Described emission-control equipment is by described motor support,
Described downstream freeing pipe way therein has flexible-disc joint.
7. according to the exhaust gear of each described transverse engine in the claim 1 to 6, it is characterized in that:
Described upstream side exhaust gear has middle convergence tube portion between described a plurality of branched pipe portions and described single freeing pipe portion,
Convergence tube portion is by dividing for all described cylinders a plurality of cylinder group that are made of the mutual discontinuous a plurality of cylinders of exhaust stroke in the middle of described, and by described each cylinder group the branched pipe portion that is communicated with each cylinder in this cylinder group merged each other,
Described single freeing pipe portion by make described a plurality of in the middle of convergence tube portion merge each other,
Described a plurality of in the middle of convergence tube portion with the exhaust downstream of overlooking down this centre convergence tube portion to the approaching state of described change-speed box to overall width direction one lateral bending song.
8. according to the exhaust gear of each described transverse engine in the claim 1 to 6, it is characterized in that:
The position that more is in exhaust-gas upstream side than described single freeing pipe portion in the described upstream side exhaust gear is made of described branched pipe portion,
Described single freeing pipe portion merges each other by making described a plurality of branched pipe portion,
Described each branched pipe portion with the exhaust downstream of overlooking down this branched pipe portion to the approaching state of described change-speed box to overall width direction one lateral bending song.
CN2010206583364U 2009-12-02 2010-12-02 Exhaust device of horizontal engine Expired - Fee Related CN201922921U (en)

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JP2009274196A JP2011116204A (en) 2009-12-02 2009-12-02 Exhaust system of transverse engine

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