Internal combustion engine component comprising an oil diffusion means.

Abstract

Internal combustion engine component comprising an oil diffusion means. The invention relates to an internal combustion engine component (6) (30), in particular a cylinder block, comprising a pressurized oil channel rail (7) intended to lubricate at least one first part (41) within the component (6), the component (6) comprising a pressurized oil diffusion means (10) outside the component (6) so as to lubricate at least one second part arranged outside the component (6). Abstract figure: fig. 3

Description

Title of the invention: Internal combustion engine element comprising an oil diffusion means. Technical field of the invention

[0001] The invention relates to an internal combustion engine element comprising an oil diffusion means. The invention also relates to an internal combustion engine comprising such an element. The invention finally relates to a vehicle comprising such an internal combustion engine or such an engine element. State of the prior art

[0002] An internal combustion engine generally comprises a liquid cooling system comprising a circuit. Such a liquid cooling system generally comprises a coolant pump which circulates a coolant within the circuit. Such a coolant pump is generally driven in rotation by a belt, generally called an "accessory belt", via a transmission connected to the crankshaft of the engine.

[0003] In certain cases it is not possible to install an accessory belt, in particular due to lack of space, within a timing case of the engine. This is particularly the case on an internal combustion engine intended to rotate an electric machine capable of recharging a traction and / or propulsion battery of an electric vehicle.

[0004] In fact, the transmission between the internal combustion engine and the electric machine places stress on the timing case. This results in the use of a chain drive to drive the coolant pump.

[0005] However, a chain drive needs to be lubricated to be reliable and durable. However, it is complex to lubricate a chain drive at this level of the internal combustion engine. Presentation of the invention

[0006] The object of the invention is to provide an engine element which overcomes the above drawbacks. In particular, the invention proposes a simple, reliable and economical solution for lubricating a coolant pump chain drive. Summary of the invention

[0007] To achieve this objective, the invention relates to an internal combustion engine element, in particular a cylinder block, comprising a pressurized oil pipe ramp intended to lubricate at least a first part within the element, the element comprising a means for diffusing oil under pressure outside the element so as to lubricate at least one second part arranged outside the element.

[0008] The diffusion means may comprise a nozzle fixed to one end of the ramp, in particular fixed by hooping in the element.

[0009] The nozzle may comprise a primary duct, in particular an axial primary duct, and a secondary duct, in particular a radial secondary duct, the secondary duct being able to open into the primary duct.

[0010] The primary duct and the secondary duct of the nozzle may be of circular section, the diameter of the primary duct being able to be greater than the diameter of the secondary duct, in particular the diameter of the secondary duct being able to be between 0.2 mm and 0.8 mm.

[0011] The diffusion means and / or the element may comprise means for positioning the diffusion means relative to the element so as to direct the diffusion of oil.

[0012] The positioning means may comprise: - a male indexing means, in particular a male flat, provided on the diffusion means or on the element, and - a female indexing means, in particular a female flat, provided on the element or on the diffusion means, the male and female indexing means being able to cooperate with each other during the fixing of the diffusion means on the element.

[0013] The invention also relates to an internal combustion engine, in particular intended to drive a vehicle and / or to drive in rotation a means of producing electrical energy of a vehicle, in particular a motor vehicle, in particular an electric vehicle, comprising an engine element as defined previously.

[0014] The internal combustion engine may comprise a casing, in particular a timing case, and the diffusion means may pass through the casing, in particular with a clearance between the diffusion means and the casing.

[0015] The internal combustion engine may comprise a coolant pump and a transmission for rotating the coolant pump, the at least one second part may comprise an element of the transmission.

[0016] The invention also relates to a vehicle, in particular a motor vehicle, comprising an internal combustion engine as defined previously or an engine element as defined previously. Presentation of figures

[0017] These objects, characteristics and advantages of the present invention will be explained in detail in the following description of an embodiment made without limitation in relation to the attached figures among which:

[0018] [Fig.l] [Fig.l] is a schematic view of a motor vehicle according to one embodiment.

[0019] [Fig.2] [Fig.2] is a partial perspective view of a heat engine according to one embodiment.

[0020] [Fig.3] [Fig.3] is a detailed sectional view, along a plane P passing through an axis of an oil pipe ramp, of the heat engine according to one embodiment.

[0021] [Fig.4] [Fig.4] is another detailed sectional view, along the plane passing through the axis of the oil pipe ramp of the thermal engine, of an oil diffusion means according to one embodiment.

[0022] [Fig.5] [Fig.5] is a detailed sectional view along a plane perpendicular to the axis of the oil diffusion means according to the embodiment. Detailed description

[0023] As illustrated in [Fig.l], a vehicle, preferably a motor vehicle 1, comprises a heat engine 30 also called an internal combustion engine. Preferably, the heat engine comprises a liquid cooling circuit. Preferably, the vehicle comprises an electric machine 20 capable of towing and / or propelling the vehicle. Advantageously, the vehicle comprises a battery 21 intended to store electrical energy. The battery 21 supplies electrical energy to the electric machine 20. For example, the battery 21 comprises a liquid cooling circuit. For example, the electric machine 20 comprises a liquid cooling circuit. For example, the liquid cooling circuits of the heat engine and / or the battery and / or the electric machine are independent, or have common parts, or even form a single circuit.

[0024] Preferably, the electric machine 20 comprises a means for producing electrical energy. More precisely, the electric machine 20 is capable of producing electric current by being driven in rotation by the heat engine 30. The electrical energy thus produced is stored in the battery 21 or used to move the vehicle, in particular via the electric machine which then functions as a motor.

[0025] Thus, preferably, the vehicle is said to be electric, that is to say that the thermal engine 30 is not intended to move the vehicle.

[0026] Alternatively, the vehicle is hybrid, the thermal engine 30 being capable of towing and / or propelling the vehicle.

[0027] The vehicle also comprises an element 6 of a thermal engine 30.

[0028] Preferably, as illustrated in [Fig.2], the element 6 is a cylinder block or cylinder block.

[0029] As illustrated in [Fig. 3], the cylinder block comprises a cylinder or liner in which a piston 41 translates. The cylinder block 6 comprises a pressurized oil pipe ramp 7 intended to lubricate at least a first part, in particular the piston 41, within the cylinder block 6. The cylinder block 6 also comprises a means 10 for diffusing pressurized oil outside the cylinder block.

[0030] More precisely, as illustrated in Figures 3 and 4, the diffusion means 10 comprises a nozzle 11 fixed to one end 7' of the pipeline ramp 7.

[0031] Preferably, as illustrated in [Fig. 4], the nozzle 11 is a cylindrical or substantially cylindrical part of axis A. The nozzle comprises a primary duct 13. For example, the primary duct 13 is a hole or bore, in particular obtained by drilling, not opening out of axis A or substantially of axis A. The primary duct 13 opens out, that is to say is opposite, the end 7' of the oil pipe ramp 7. For example, the opening end of the primary duct 13 communicating with the open end 7' of the ramp 7 comprises a chamfer 17 (illustrated in FIGS. 3 and 5). The nozzle 11 also comprises a secondary duct or nozzle 12. For example, the secondary duct 12 is radial or substantially radial. In this case, the secondary conduit 12 extends perpendicularly or substantially perpendicularly to the axis A. Note that the secondary conduit 12 opens into the primary conduit 13.Preferably, the secondary conduit 12 opens at a bottom 14 of the primary conduit 13.

[0032] Alternatively, the secondary conduit extends from the bottom of the primary conduit, for example parallel or substantially parallel to the primary conduit. Alternatively again, the secondary conduit extends orthogonally or substantially orthogonally relative to a surface of a cone 16. Such a cone 16 preferably comes from a bore for obtaining the primary conduit.

[0033] Preferably, the primary duct 13 and the secondary duct 12 of the nozzle 11 are of circular section. The diameter of the primary duct 13 is greater than the diameter of the secondary duct 12. For example, the diameter of the secondary duct 12 is between 0.2 mm and 0.8 mm. The nozzle is for example a part obtained by turning before machining, in particular drilling of the secondary duct.

[0034] Advantageously, the oil diffusion means 10 and / or the cylinder housing 6 comprises a means 15 for positioning the diffusion means 10 relative to the cylinder housing 6.

[0035] Alternatively, the nozzle could also have a single conduit with a calibrated diameter of between 0.2 mm and 0.8 mm.

[0036] As illustrated in [Fig.5], the positioning means 15 comprises a male indexing means 18 provided on the nozzle 11. For example, the male indexing means 18 is a male flat 18'. The positioning means 15 then comprises a female indexing means 8 arranged in the cylinder block 6. For example, the female indexing means 8 is a female flat 8'. Thus, the male and female indexing means cooperate with each other during the insertion and / or fixing of the nozzle 11 in the cylinder block 6. Other shapes, in particular male / female, fitting into each other and / or locking relative to each other so as to prevent any pivoting around the axis A between the diffusion means and the cylinder block 6 may be suitable.

[0037] Alternatively, the male indexing means is provided on the cylinder block while the female indexing means is provided on the oil diffusion means.

[0038] As illustrated in Figures 2, 3 and 4, the internal combustion engine 30 comprises a casing 5. Preferably, the casing 5 is a timing case, i.e. a cover or cover intended to close and / or protect a timing face of the engine 30.

[0039] Alternatively, the casing 5 hides and / or closes a face comprising parts other than those participating in the distribution of the engine.

[0040] As illustrated in Figures 2 to 4, the nozzle 11 passes through the casing 5. Preferably, a clearance J between the nozzle 11 and the timing case 5 is present (illustrated in [Fig.4]). Thus, when mounting the timing case on the cylinder block, the timing case is slipped around the nozzle 11, an orifice being provided for this purpose in the timing case 5.

[0041] For example, the heat engine 30 comprises a coolant pump 9 and a transmission 2, 4, 3 for rotating the coolant pump 9 for cooling the heat engine and / or the electric machine and / or the battery 21. For example, the transmission element 2 is a drive pinion, the transmission element 4 is a chain and the transmission element 3 is a pinion of the coolant pump. The oil diffusion means 10 then lubricates at least one second element-type part of the transmission 2, 4, 3. As a reminder, this at least second part is arranged outside the cylinder block 6 and outside the closed, or substantially closed, space between the cylinder block 6 and the timing case 5.

[0042] Thus, the oil diffusion means 10 makes it possible to lubricate at least one second part arranged outside the element 6. The positioning means 15 of the diffusion means 10 relative to the cylinder block 6 makes it possible to ensure optimal orientation of the oil flow.

[0043] Optionally, the diffusion means comprises several secondary conduits 12 so as to multiply the lubrication directions and / or to lubricate parts other than the chain 4 and / or the sprockets 2, 3 directly or indirectly.

[0044] Thus, the heat engine 30 comprises a lubrication system of a device additional drive. The nozzle is arranged at the end of the oil rail and is used to lubricate such a drive device, in particular the chain 4 of such a drive device, and possibly a reducer.

[0045] Thus, although it requires lubrication, the solution makes it possible to arrange a coolant pump transmission outside the timing case, the transmission being of the chain and sprocket type. This is made possible although the transmission extends outside the timing case. Thanks to the solution, the longevity of the transmission is increased, in particular that of the chain 4. In addition, the solution is simple to integrate and does not require the addition of an oil pump or other complex element.

[0046] Thus, in the case of a heat engine intended to power an electric machine capable of producing electricity for an electric vehicle, the transmission of the coolant pump is perfectly lubricated.

[0047] In summary, the solution advantageously comprises a lubrication nozzle arranged at the end of the main oil rail of the cylinder block. The oil is thus conveyed to lubricate the coolant pump drive chain 4 on the other side of the timing case 5 relative to the cylinder block 6. Indeed, the nozzle 11 passes through the timing case 5. As mentioned previously, the nozzle comprises a main supply channel 13 opening opposite the rail 7 of the cylinder block 6. For example, in the case of a pipe rail 7 of circular section, the axis of the rail and the axis A of the nozzle are coaxial or substantially coaxial. The nozzle 11 also comprises the nozzle 12 oriented towards the chain 4 meshed with the pinions 2, 3.

[0048] As a reminder, the orientation of the lubrication nozzle 12 is ensured by a physical indexing geometry of the nozzle in, or relative to, the element 6 which receives it. This indexing can be a simple flat which positions the nozzle when mounting the nozzle in the cylinder block 6. Note that the nozzle is preferably shrunk into the cylinder block, and / or force-fitted. Alternatively, the nozzle is assembled to the cylinder block by gluing or by another assembly method.

[0049] The diameter of the nozzle 12 is preferably between 0.2 and 0.8 mm, in particular depending on the oil pressure and / or the characteristics of the oil. The oil pressure is for example between 1 bar and 5 bars.

[0050] Although the described solution passes through a timing case, it can be used to pass through other parts. Furthermore, although the described solution allows lubricating a drive, for example comprising a chain and sprockets, it can be applied to lubricate one or more other mechanisms by liquid lubricants.

[0051] In other words, the nozzle 11 is a fretted lateral pin, for example extending parallel to the axis of the crankshaft of the thermal engine 30. Thus, the presence of the electric machine 20 which is for example driven in rotation by the heat engine 30 via a transmission at the level of the timing case 5 does not impact the lubrication of the coolant pump transmission. Advantageously, the transmission, in particular via a reducer (not shown), between the heat engine and the electric machine is arranged close to the nozzle so as to benefit from the oil diffused by the nozzle for its lubrication.

[0052] Thanks to the torque provided by the heat engine 30, the electric machine 20 can produce electrical energy to store it in the battery 21 and / or to consume it to move the vehicle. Simultaneously, the coolant pump is rotated by the transmission 2, 4, 3, the pinion 2 being for example driven by the crankshaft of the heat engine via a cascade of pinions. Liquid cooling for the heat engine and / or for the electric machine and / or for the battery 21, if applicable, is therefore ensured in a reliable and durable manner, the chain transmission being lubricated.

[0053] Advantageously, the heat engine 30 also comprises a system for collecting the oil passing through the diffusion means 10, after this oil has lubricated the at least one second part 42. The engine 30 also preferably comprises a channeling device making it possible to return the oil thus collected to the tank of the engine lubrication circuit.

[0054] As a remark, the solution therefore achieves the desired objective of facilitating the lubrication of a chain transmission outside of an engine element and has the following advantages: - it is economical, - it is simple to implement and requires only a few machining steps at the cylinder block level to open the oil pipe ramp on one side on the distribution side.

Claims

Claims

1. Internal combustion engine (30), in particular intended to drive a vehicle and / or to drive in rotation a means for producing electrical energy of a vehicle, in particular a motor vehicle (1), in particular an electric vehicle, characterized in that the internal combustion engine (30) comprises: - an element (6), in particular a cylinder block, comprising a ramp (7) for channeling pressurized oil intended to lubricate at least a first part (41) within the element (6), the element (6) comprising a means (10) for diffusing pressurized oil outside the element (6) so as to lubricate at least a second part (42) arranged outside the element (6), - a coolant pump (9) and a transmission (2, 4, 3) for driving in rotation the coolant pump (9), the at least one second part comprising an element of the transmission (2, 4, 3).

2. Internal combustion engine (30) according to the preceding claim, characterized in that the diffusion means (10) comprises a nozzle (11) fixed to one end of the ramp (7), in particular fixed by hooping in the element (6).

3. Internal combustion engine (30) according to the preceding claim, characterized in that the nozzle (11) comprises a primary duct (13), in particular an axial primary duct (13), and a secondary duct (12), in particular a radial secondary duct (12), the secondary duct (12) opening into the primary duct (13).

4. Internal combustion engine (30) according to the preceding claim, characterized in that the primary duct (13) and the secondary duct (12) of the nozzle (11) are of circular section, the diameter of the primary duct (13) being greater than the diameter of the secondary duct (12), in particular the diameter of the secondary duct (12) is between 0.2 mm and 0.8 mm.

5. Internal combustion engine (30) according to one of the preceding claims, characterized in that the diffusion means (10) and / or the element (6) comprises a positioning means (15) of the diffusion means (10) relative to the element (6) so as to orient the diffusion of oil.

6. Internal combustion engine (30) according to the preceding claim, ca-

7.

8. characterized in that the positioning means (15) comprises: - a male indexing means (18), in particular a male flat (18'), provided on the diffusion means (10) or on the element (6), and - a female indexing means (8), in particular a female flat (8'), provided on the element (6) or on the diffusion means (10), the male and female indexing means cooperating with each other during the fixing of the diffusion means (10) on the element (6). Internal combustion engine (30) according to one of the preceding claims, characterized in that it comprises a casing (5), in particular a distribution casing (5), and in that the diffusion means (10) passes through the casing (5), in particular with a clearance (J) between the diffusion means (10) and the casing (5). Vehicle, in particular a motor vehicle (1), characterized in that it comprises an internal combustion engine (30) according to one of the preceding claims.

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