WO2017032934A1

WO2017032934A1 - Internal combustion engine provided with a support for longitudinal application

Info

Publication number: WO2017032934A1
Application number: PCT/FR2016/051932
Authority: WO
Inventors: Louis Lamoureux
Original assignee: Peugeot Citroen Automobiles Sa
Priority date: 2015-08-26
Filing date: 2016-07-25
Publication date: 2017-03-02
Also published as: FR3040335B1; EP3341232A1; FR3040335A1

Abstract

The invention relates mainly to an internal combustion engine (1) comprising: an engine block (2), a post-treatment system (20) installed at the outlet of the engine block (2), and a support (10) for fixing said post-treatment system (20) to the engine block, characterized in that said fixing support (10) is configured to incline said post-treatment system (20) in such a way that a longitudinal axis (X) of said post-treatment system (20) makes a nonzero angle (α) with respect to a longitudinal mid plane (5) of said engine block (2) so as to allow said engine block (2) to be fixed to a chassis via said support (10).

Description

INTERNAL COMBUSTION ENGINE WITH SUPPORT

FOR LONGITUDINAL APPLICATION

The invention relates to an internal combustion engine provided with a support for longitudinal application. The invention finds a particularly advantageous, but not exclusive, application for motorized means of maritime or terrestrial locomotion, such as motor vehicles. The invention may also be used with an alternator to ensure its drive or with a hydraulic pump, or in any other industrial application requiring the integration of an internal combustion engine in a longitudinal configuration. In a manner known per se, an internal combustion engine 1 shown in Figure 1a and 1b mainly comprises a motor block 2 associated with various peripheral members. The engine block 2, seat of the combustion of air and fuel comprises a cylinder block having cylinders which define combustion chambers. The cylinder block is closed in its upper part by a cylinder head 6 covered with a cylinder head cover and in its lower part by an oil pan 7 for the internal lubrication of the engine block 2. The engine block 2 contains a system mobile comprising pistons sliding inside the cylinders in a reciprocating rectilinear motion and a crankshaft connected to the pistons by means of connecting rods so that the relative movement of the pistons rotates the crankshaft. The peripheral members, such as a post-treatment system 20 for cleaning exhaust gas, a turbocharger 40 or an oil filter, are members located on the exhaust side face or on the intake side. 2. Other components such as the alternator, the air conditioning compressor and the power steering pump are accessories driven by a drive belt running along a pulley 45 located on one of the faces of the engine. end of the engine block 2 and driven by the crankshaft. Supports or members 1 10 are generally designed to fix each aforementioned member to the engine block 2.

In the case of a transverse installation of the internal combustion engine 1, that is to say when the axis of the crankshaft is perpendicular to the longitudinal axis of the vehicle, it is necessary to limit the size of the engine 1 inside the engine compartment. For this purpose, the carrier 1 10 supports and fixes the post-processing system 20 as compactly as possible to the engine block 2. In addition, the engine block 2 has fixing points 4 located at the end of the cylinder head 6 ensuring the maintenance of the engine 1 in transverse position in the engine compartment. Thus, with the aid of the holder 1 10 and the attachment points 4, the internal combustion engine 1 has a minimal space in the engine compartment, which promotes its transverse installation in the vehicle.

However, during the design or construction of a vehicle, it is sometimes desired to use the same engine block 2 and the same post-processing system 20 associated with it while positioning the engine 1 longitudinally at the same time. inside its compartment. However, this configuration change is currently not possible, insofar as a transversely installed motor does not have enough attachment points 4 with the chassis of the vehicle to install longitudinally. This configuration change would then require a new design of the post-processing system 20 and the engine block 2 thus generating significant design and manufacturing costs. The invention aims to effectively overcome these disadvantages by providing an internal combustion engine comprising:

- an engine block,

a post-processing system installed at the output of the engine block, and

a support for fixing said post-processing system on the engine block,

such that said mounting bracket is configured to tilt said post-treatment system such that a longitudinal axis of said post-processing system forms a non-zero angle with respect to a longitudinal median plane of said engine block to allow attachment said engine block to a chassis via said support.

In other words, the fixing support of the invention comprises means for tilting said post-processing system so that a longitudinal axis of said post-processing system forms a non-zero angle with respect to a median plane. longitudinal of said engine block, which allows to allow the attachment of said engine block to the frame through this support.

The invention thus creates a mounting area to the chassis to move from a transverse engine installation to a longitudinal installation without modifying the engine block or the post-processing system.

According to one embodiment, said support comprises: first fixing means to said engine block,

second means of attachment to said post-processing system, and

at least one third fixing means to said frame.

According to one embodiment, said first and second fixing means to said engine block and said post-processing system have a first or second axis oriented in a direction perpendicular to said longitudinal median plane of said engine block.

[001 1] In one embodiment, said third chassis attachment means has a third axis oriented in a direction parallel to said longitudinal median plane of said engine block.

According to one embodiment, said first, second, and third fastening means each comprise at least one opening for receiving a corresponding fastening element.

In one embodiment, said post-processing system comprises tabs provided with holes each intended to come opposite a corresponding opening of the second fastening means of said support.

In one embodiment, said fixing bracket is fixed in an area located in a lower part of said engine block on the exhaust side. This area located in the lower part of the engine block has a high rigidity on the engine block. In one embodiment, said angle of inclination between said longitudinal axis of said post-processing system and said longitudinal median plane of said engine block depends on a space required for an implantation of the third fastening means to said frame.

In one embodiment, said post-treatment system comprises a catalyst, a particulate filter and / or a nitrogen oxides treatment system. The invention also relates to an assembly comprising the motor as described above, and a motor vehicle frame, the engine block being fixed to said frame by means of the support described above.

The invention also relates to a motor vehicle which comprises an internal combustion engine as defined above or an assembly as defined above. The invention will be better understood on reading the description which follows and the examination of the figures that accompany it. These figures are given for illustrative but not limiting of the invention.

Figures 1a and 1b, already described, are perspective views from different angles of an internal combustion engine according to the state of the art installed in a transverse configuration;

[0021] Figure 2 shows a perspective view of a mounting bracket according to the present invention supporting a post-processing system installed at the exhaust outlet; Figure 3 is a perspective view of a mounting bracket attached to the engine block according to the present invention without the post-processing system;

Figures 4a and 4b are perspective views from different angles of an internal combustion engine according to the present invention installed in a longitudinal configuration and in particular provided with a post-processing system inclined with the aid of a mounting bracket;

Identical elements, similar, or the like retain the same reference from one figure to another. In the following description, the relative terms of type "high" and "low" are understood with respect to the position of the internal combustion engine installed in the engine compartment of the vehicle. Figures 4a and 4b show an internal combustion engine 1 comprising a motor block 2, seat of the combustion of air and fuel. The engine block 2 comprises a cylinder block having cylinders defining combustion chambers. The cylinder block is closed in its upper part by a cylinder head 6 covered with a cylinder head cover and in its lower part by an oil sump 7 allowing the internal lubrication of the engine block 2. The engine block 2 contains a system mobile comprising pistons sliding inside the cylinders in a reciprocating rectilinear motion and a crankshaft connected to the pistons by means of connecting rods so that the relative movement of the pistons rotates the crankshaft.

The engine 1 also comprises a post-processing system 20 installed at the output of the engine block 2 on the exhaust side face. This post-treatment system 20, protected in its upper part by a heat shield, allows the depollution of the gases exhaust system from the engine block 2. For this purpose, the post-processing system 20 includes a catalyst supplied with catalytic liquid by injectors. The post-treatment system may also include a particulate filter and / or a nitrogen oxide treatment system. In FIG. 2, it can be seen that this post-processing system 20 comprises fastening lugs 21 in order to be fastened to the engine block 2 by means of a support 10.

More specifically, to ensure attachment to the engine block 2, the support 10 is fixed in a zone 3 of attachment. This zone 3, visible in FIG. 3, is preferably located in the lower part of the engine block 2 because it has a high rigidity on the carrier element 2. For this purpose, the support 10 is fixed to the zone 3 by means of fixing means 1 1. In a nonlimiting manner, the fastening means 1 1 comprise openings, in this case three in number, in which are inserted fasteners, for example elements of the screw type or stud-nut system. These openings have a first axis Y1 substantially perpendicular to the longitudinal median plane 5 of the engine block 2. It will be noted that these fastening means 1 1 use the same attachment points on the zone 3 as those used by the carrier 1 10 of the state of the art, which allows to fix the supports 10 to the pre-existing engine blocks 2.

In order to fix the post-processing system 20 to the engine block 2, the support 10 comprises fastening means 12. These fastening means 12 comprise, for example, openings made in portions 120 projecting from the support 10, such as spacers 120, intended to be positioned opposite holes in the fastening lugs 21 and intended to receive a fastener, such as a screw, a rivet or a stud-nut. The openings have a second axis Y2 substantially perpendicular to the longitudinal median plane 5 of the engine block 2. The fastening means 12 and the tabs 21, for example two in number, are positioned in a transverse direction of both sides. Another of the post-processing system 20. It should be noted that the invention avoids having to modify the shape of the fastening tabs 21, or of the post-processing system 20 with respect to the configuration of the state of the art. in order to reuse the pre-existing post-treatment systems. As illustrated in Figure 4a and 4b, the support 10 and the spacers 120 are configured to tilt the post-processing system 20 so that its longitudinal axis X forms an angle with respect to the longitudinal median plane 5 of the block In this case, the inclination is defined by a length of the spacers 120 whose end faces may be inclined to cooperate with the fastening lugs 21. The outlet 200 of the after-treatment system 20 going to the turbocharger 40 can be adapted according to the angle a. The angle of inclination a depends on a space necessary for an implantation of a fastening means 13 to the frame. In an exemplary embodiment, the angle of inclination a is at least equal to five degrees. The distance of the post-processing system 20 from the engine block 2 thus makes it possible to create a zone of attachment to the chassis of the vehicle.

In order to ensure the attachment of the engine 1 to the chassis, the support 10 comprises at least one fastening means 13 for establishing a connection between the engine block 2 and the vehicle chassis. As can be seen in FIG. 3, the fastening means 13 comprises at least one opening having a third axis Y3 substantially parallel to the longitudinal median plane 5 of the engine block 2, or in other words substantially perpendicular to the first and second axes Y1 and Y2 fastening means 1 1 and 12. The opening is intended to allow the passage of a fastener, such as a screw or a stud-nut system. The fastening means 13 may be connected to a damping foot of the chassis of the vehicle.

Thus, the presence of this support 10 allows a motor 1 initially intended to be installed transversely to be installed longitudinally with respect to the longitudinal axis of the vehicle while maintaining the same post-processing system 20 and the same. engine block 2.

The invention has been described in the context of an internal combustion engine installed in a vehicle engine compartment. The invention finds a particularly advantageous, but not exclusive, application for motorized means of maritime or terrestrial locomotion, such as motor vehicles. The invention may also be used with an alternator to ensure its drive or with a hydraulic pump, or in any other industrial application requiring the integration of an internal combustion engine in a longitudinal configuration.

Claims

claims

1. Internal combustion engine (1) comprising:

- an engine block (2),

a post-processing system (20) installed at the output of the engine block (2), and

a fixing support (10) of said post-processing system (20) on the engine block

(2)

characterized in that

said fixing bracket (10) is configured to tilt said post-processing system (20) such that a longitudinal axis (X) of said post-processing system (20) forms an angle (a) which is not zero relative to a longitudinal median plane (5) of said engine block (2) for allowing attachment of said engine block (2) to a chassis via said support (10).

2. Internal combustion engine according to claim 1, characterized in that said support (10) comprises:

first fastening means (1 1) to said engine block (2),

second attachment means (12) to said post-processing system (20), and

at least a third fastening means (13) to said frame.

3. Internal combustion engine according to claim 2, characterized in that said first and second fastening means (1 1, 12) to said engine block (2) and said post-processing system (20) have a first or second axis (Y1, Y2) oriented in a direction perpendicular to said longitudinal median plane (5) of said engine block (2).

4. Internal combustion engine according to claim 2 or 3, characterized in that said third fastening means (13) to said frame has a third axis (Y3) oriented in a direction parallel to said longitudinal median plane (5) of said engine block. (2).

5. Internal combustion engine according to any one of claims 2 to 4, characterized in that said first, second, and third attachment means (1 1, 12, 13) each comprise at least one opening for receiving an element. corresponding fixation.

6. Internal combustion engine according to claim 5, characterized in that said post-processing system (20) comprises lugs (21) provided with holes each intended to come opposite a corresponding opening of the second fastening means (12). ) of said support (10).

7. Internal combustion engine according to any one of claims 1 to 6, characterized in that said fixing support (10) is fixed in an area (3) located in a lower part of said engine block (2) exhaust side .

8. Internal combustion engine according to any one of claims 2 to 7, characterized in that said angle of inclination (a) between said longitudinal axis (X) of said post-processing system (20) and said longitudinal median plane (5) of said engine block (2) depends on a space required for an implantation of the third fastening means (13) to said frame.

9. Internal combustion engine according to any one of claims 1 to 8, characterized in that said post-treatment system (20) comprises a catalyst, a particulate filter and / or a nitrogen oxides treatment system. .

10. An assembly comprising the engine according to one of the preceding claims and a motor vehicle frame, characterized in that the engine block (2) is fixed to said frame via said support (10).

1 1. Motor vehicle characterized in that it comprises an internal combustion engine as defined in one of claims 1 to 9 or an assembly according to the preceding claim.