FR2607046A1 - METHOD AND DEVICE FOR ASSEMBLING CONSTITUENT ELEMENTS OF A MOTOR EXHAUST LINE - Google Patents

Abstract

PROCEDURE FOR ASSEMBLING THE COMPONENT ELEMENTS OF AN INTERNAL COMBUSTION ENGINE EXHAUST LINE; FOLLOWING THE INVENTION, IT CONSISTS IN PARTICULAR OF POSITIONING THEM WITH PRECISION IN SPACE BY ASSIMILING THE STRAIGHT TUBULAR SECTIONS OF THE SAME TO VECTORS TO BE ABLE TO LESS THEM ON ADJUSTABLE ASSEMBLY SUPPORTS 5 OF WHICH THE ADJUSTMENT PARAMETERS AND OF POSITIONING ARE CALCULATED BY THE INTERMEDIATE OF SOFTWARE AND A MARK CALCULATED "VEHICLE REFERENTIAL". APPLICATION IN PARTICULAR TO THE CONTROL AND ASSEMBLY OF ELEMENTS OF EXHAUST LINES, AND ANTI-ROLL BARS.

Description

_ 1 _

  METHOD AND DEVICE FOR THE ASSEMBLY OF CONSTITUENT ELEMENTS

  ENGINE EXHAUST LINE.

  The present invention relates to the assembly and control of the constituent elements of an engine exhaust line to

internal combustion.

  It relates more particularly to a method and a device

  for such operations, and applicable also for the

  control of exhaust elements and anti-roll bars.

  For these different operations, high precision is required due to a high number of components (manifold outlet pipe, manifold down pipe, catalyst inlet pipe, catalyst, inlet pipe 'a relaxing ol, relaxation volume, expansion volume outlet pipe, muffler inlet pipe, silencer, cannula, a significant length of the exhaust line and the complexity of it broken lines at the corners

  alternately salient and reentrant.

  The invention therefore proposes to solve this problem. For this purpose, and with a view to saving time and improving quality,

  its object is such a process which consists, according to a parti-

  essential cularity, to accurately position in space,

  these various components of an exhaust line, in

  the tubular rectilinear sections of it to

  vectors to support them on adjustable supports

  vee appearance whose adjustment and positioning parameters are calculated via software and a benchmark

called "vehicle reference".

  This process allows a very precise positioning in space

  by means of mounting brackets easy and quick to adjust.

- 2 -

  According to another feature, each assembly support is designed to adjust in this reference, the three coordinates of a point of the axis of the tubular rectilinear section defined in space and chosen as a reference of this support on the one hand , and the two angles of inclination and orientation of the vector

  defining this axis at the point o is placed this support, on the other hand.

  It is thus easy to display on a screen the setting parameters of the assembly supports, once the computer used has recorded the shape of a tubular section defined by

  its coordinates, as well as the locations of the selected media.

  Other features and advantages of the invention will emerge

  more clearly from the description which follows, of a way of realizing

  preferred embodiment, given by way of non-limiting example, in

  FIG. 1 is a perspective view of an exhaust line;

  FIG. 2 represents a perspective view of an implan-

  tation of a landmark called "vehicle reference"; FIG. 3 represents a schematic diagram relating to the method according to the invention; FIG. 4 represents a schematic perspective view of an assembly support; FIG. 5 represents a partial perspective view of an exhaust line assembled on V-shaped supports; - Figure 6 shows an elevational view of an assembly support; 3-

- - w-

  FIG. 7 represents a right view of the pre-FIG.

  yielded, in partial sections along A-A and B-B; and FIG. 8 represents a partial view along F of

Figure 7.

  According to the invention, the assembly of different elements constituting an exhaust line as illustrated in Figure 1, is performed according to the following principle. The rectilinear and tubular sections of this line are assimilated to

  vectors, and are supported on assembly supports S eé.

  These are judiciously placed and adjusted so as to posi-

  properly fit the hoses, muffler, silencer,

  hooks, legs, brackets on flanges etc ...

  The various adjustment parameters are obtained by means of a program fed by usual data coming from the

design offices.

  Indeed, the assembly of the exhaust line is carried out on

a checkered marble (Figure 4).

  The coordinates of the different points defining each constituent element are given in the "vehicle reference" defined

by the design office (Figure 2).

  This checkered marble is graduated according to this mark. The positioning of the various tubular sections is achieved by means of

  Adjustable mounting brackets S that support them (Figure 5).

  These assembly supports allow the adjustment (FIG. 3): of the three coordinates of a point of the axis of the tubular section defined in space and chosen as a reference of the support; and the two angles of inclination and orientation of the vector defining the axis of this tubular section at the point o is placed this support. The positioning of the different "volumes" constituting the non-tubular sections of the exhaust line is made possible by the adoption on this assembly support of a means for adjusting the rotation Y of each volume around its

own axis.

  The calculation of the adjustment parameters of each assembly support

  Bearing of tubular sections is carried out by software.

  Once the shapes of the tubular sections defined by their axial coordinates, and the locations of the chosen supports are introduced into the computer, the treatment can

  and then the parameters are displayed as output.

  The programming system comprises a computer, a terminal provided with an alphanumeric keyboard and a screen, a printer and a specific program for calculating these adjustment parameters. With reference to FIGS. 4 to 8, a device for implementing the assembly and control method previously described comprises: a gridded marble 0 graduated according to the "vehicle reference"; and different assembly supports S consisting of each of the following parts: a cross base 4, 5, 6 with rectilinear displacements

XR, YR;

  A carrier base 3 mounted on this crossed base and capable of rotating an orientation angle); 5. a rule 2 secured to this base 3; a vernier carried-v 1 sliding on this rule in the direction ZR and likely to turn an inclined angle; a vernier 17 of volume positioning, secured to a vee 14 and rotatable by a pivot angle X;

15. and a vee 14 element holder.

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Claims (4)

  1. A method for assembling the constituent elements of an exhaust line of an internal combustion engine, characterized in that it consists in particular to position them accurately in space by assimilating the straight tubular sections thereof to vectors to be able to press them on adjustable mounting brackets (5) in vé whose parameters   adjustment and positioning are calculated through   of a software and a benchmark called "vehicle reference".   2. Method according to claim 1, characterized in that each assembly support is designed to adjust in this frame, the three coordinates of a point of the axis of the section.   tubular rectilinear defined in space and chosen as a reference   of this support on the one hand, and the two angles of inclination and orientation of the vector defining this ae at point o is placed this support, on the other hand.   3. Method according to claim 1 or 2, characterized in that each assembly support is designed to be able to adjust in this reference, the angle of rotation of a non-tubular section called   "volume" around its own axis defined in space.   4. Device for implementing the method in accordance with   any of claims 1, 2 and 3, characterized in that   it includes: - a checkered marble (O) graduated according to the vehicle reference; and different assembly supports (S) each consisting of the following parts: a cross base (4, 5, 6) with rectilinear displacements (XR, YR);   -7. a carrier base (3) mounted on this crossed base, with rotation (f); a rule (2; integral with this base-vé carrier: a vernier doorvé (1) sliding on this next rule (ZR "and rotation (0);   a rotary volume positioning vernier (17)   tion (6); and a vee (14 element holder