EP3504403A1 - Système de motorisation et procédé de lubrification et de refroidissement associé - Google Patents
Système de motorisation et procédé de lubrification et de refroidissement associéInfo
- Publication number
- EP3504403A1 EP3504403A1 EP17764771.6A EP17764771A EP3504403A1 EP 3504403 A1 EP3504403 A1 EP 3504403A1 EP 17764771 A EP17764771 A EP 17764771A EP 3504403 A1 EP3504403 A1 EP 3504403A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- engine
- branch
- lubrication
- cooling
- circuit
- 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.)
- Withdrawn
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 83
- 238000005461 lubrication Methods 0.000 title claims abstract description 82
- 238000002485 combustion reaction Methods 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims description 35
- 239000000314 lubricant Substances 0.000 claims description 29
- 238000005086 pumping Methods 0.000 claims description 21
- 230000001050 lubricating effect Effects 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 230000001939 inductive effect Effects 0.000 claims description 4
- 239000000446 fuel Substances 0.000 description 8
- 239000003921 oil Substances 0.000 description 8
- 238000000926 separation method Methods 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000002199 base oil Substances 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 210000000056 organ Anatomy 0.000 description 2
- 239000005069 Extreme pressure additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000007866 anti-wear additive Substances 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005555 metalworking Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 239000007764 o/w emulsion Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
- F01M9/10—Lubrication of valve gear or auxiliaries
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/12—Closed-circuit lubricating systems not provided for in groups F01M1/02 - F01M1/10
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
- F01M5/002—Cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
- F01M9/02—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00 having means for introducing additives to lubricant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/02—Arrangements for cooling cylinders or cylinder heads
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/12—Closed-circuit lubricating systems not provided for in groups F01M1/02 - F01M1/10
- F01M2001/123—Closed-circuit lubricating systems not provided for in groups F01M1/02 - F01M1/10 using two or more pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
- F01M5/002—Cooling
- F01M2005/004—Oil-cooled engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P2003/006—Liquid cooling the liquid being oil
Definitions
- the present invention relates to a motorization system for a motor vehicle, and a method of lubricating and cooling such a motorization system.
- a motorization system including a two-part internal combustion engine, namely a so-called “low-motor” part, comprising an “engine block” which defines cylinders, a housing, which contains the engine lubricant, as well as a movable hitch, which includes connecting rods, pistons and a crankshaft, and a so-called “high-engine” part, comprising one or more yokes, which are assembled on the lower engine.
- the cylinder head is the seat of the distribution of the intake gases in combustion chambers, via an intake duct and intake valves, and the discharge of the combustion gases, through 'an exhaust duct and exhaust valves.
- Each combustion chamber, seat of the combustion of an air-fuel mixture is the volume between the top of the piston when it is in the high position, named "top dead center” and the cylinder head.
- FR-A-2 605 677 discloses a lubrication system for an internal combustion engine which comprises a main lubrication circuit of the lower engine, incorporating an oil pump mounted at the end of the crankshaft, and a secondary lubrication circuit for the built-in motor which is independent of the main circuit and incorporates itself a pump mounted at the end of the camshaft of the engine.
- the lubrication system is thus separated into two separate circuits, so that the oil to lubricate the high-engine is not polluted by the oil used to lubricate the lower-engine, which improves the life of the engine .
- this system is relatively complex and requires the implementation of a large number of separate circuits, thus increasing the cost of the engine.
- the invention aims to respond to these problems by proposing a new motorization system at a reasonable cost price, with consumption of Particularly low fuel, long life and particularly simple design.
- the invention relates to an engine system for a motor vehicle, the system comprising an internal combustion engine, which comprises a built-in engine and a low-engine coupled, and a low-engine lubrication circuit.
- the drive system further comprises a mixed cooling and lubricating circuit, which is fluidly separated from the low-engine lubrication circuit and which includes a high-engine lubrication branch and a high-engine cooling branch, which is in bypass with the lubrication branch of the built-in motor.
- the mixed circuit also comprises a cooling branch of the lower motor.
- the lubrication and the cooling of the high engine are pooled to perform these two functions using the same mixed circuit, so that the number of separate circuits in the motorization system is reduced to simplify the design, while a separate lubrication of the built-in motor and the low-motor is nevertheless ensured.
- This separate lubrication improves the service life of the engine.
- the efficiency of cooling combined with the separation of the lubrication between the low-engine and the high-engine makes it possible to ensure that the fuel consumption of the engine system is particularly low.
- the motorization system has fewer separate circuits, it is simplified and its cost price is lowered accordingly.
- the high-engine lubrication branch comprises an internal lubrication network, which extends into the high-engine, so as to lubricate mechanical connections of the high-engine
- the high-engine cooling branch comprises a network internal cooling, which extends into the upper motor, fluidly separated from the internal lubrication network and so as to cool the mechanical organs of the high-engine
- the high-engine lubrication branch and the high-engine cooling branch meet at a junction of the mixed circuit, the branch being located downstream of the internal lubrication network and the internal cooling network;
- the motorization system comprises common pumping means for the high-engine cooling branch and for the upper-engine lubrication branch;
- the common pumping means comprise a two-stage pump, which comprises:
- a first pumping stage inducing a first flow and a first pressure in the upper engine's lubrication branch
- a second pumping stage inducing a second flow and a second pressure in the high-engine cooling branch, the second flow rate being greater than the first flow rate and the second pressure being lower than the first pressure
- a common drive actuator of the first pumping stage and the second pumping stage the common actuator being preferably an electric motor
- the cooling branch of the low-motor is in branch of the cooling branch of the high-engine
- the motorization system comprises a compressor, which equips the internal combustion engine, and which is designed to compress, at least in part, an intake fluid intended for the filling of cylinders of the lower engine, whereas the mixed circuit comprises a cooling branch of the compressor, which is preferably in branch of the cooling branch of the engine.
- the motorization system comprises a compressor lubrication circuit, which is fluidly separated from the mixed circuit.
- the invention also relates to a high-engine for an internal combustion engine, the high-engine comprising a cylinder head, containing mechanical connections to be lubricated and mechanical members to be cooled, an internal network for lubricating the mechanical connections to be lubricated, and an internal cooling network of the mechanical members to be cooled.
- the internal lubrication network and the internal cooling network confluence at a junction formed in the cylinder head.
- the subject of the invention is a method of lubricating and cooling a motorization system in accordance with the foregoing. This method comprises at least the following steps:
- FIG. 1 is a schematic representation of a motorization system according to a first embodiment of the invention.
- Figure 2 is a schematic representation similar to Figure 1 of a motorization system according to a second embodiment of the invention.
- the engine system 1 shown schematically in Figure 1 is designed to equip a motor vehicle, for example ground, such as a car, not shown.
- the engine system 1 comprises an internal combustion engine 3, which comprises a built-in engine 5 and a low-engine 7 coupled.
- the system 1 also comprises a compressor 35 equipping the engine 3.
- the low-engine 7 is shown separately and above the high-engine 5, whereas in fact the low-engine 7 is coupled to and below the built-in engine 5.
- top and lower and their equivalents designate a direction oriented vertically towards the top of the vehicle when it is in a position of use, in which it rests for example on the ground.
- the expressions “low” and “lower” and their equivalents designate an opposite direction.
- the low-engine 7 comprises the following elements, not illustrated:
- crankshaft rotatably mounted within the crankcase and the engine block
- pistons slidably mounted within the cylinders, and connected to the crankshaft via connecting rods of the lower engine 7, each rod being rotatably mounted on one of the pistons and on the crankshaft.
- the pistons are driven by an alternating translational movement within the cylinders in order to drive the crankshaft via the connecting rods.
- the low-engine 7 therefore comprises mechanical connections to be lubricated, such as, for example, rotational connections between the crankshaft and the connecting rods, as well as parts in sliding contact of each piston against its respective cylinder, sometimes referred to as the "piston ring segment”. shirt ".
- the motorization system 1 comprises a lubrication system for lubricating the mechanical connections of this low-engine 7.
- this lubrication system comprises a lubrication circuit 105 and a pump 103.
- the pump 103 circulates a lubricant, of the oil type, within the circuit 105, to supply the lower motor 7 with this lubricant and to lubricate the aforementioned mechanical connections of the lower motor 7.
- the circuit 105 comprises an internal network 106 lubricant, which extends within the lower motor 7, and a lubricant reserve 107.
- a lubricant filter or oil filter is optionally provided.
- the internal network 106 forms lubricant circulation galleries within the lower motor 7 to reach each link to be lubricated. More specifically, the internal network 106 comprises internal ducts formed in the journals and the crank pinches. The inner ducts of the pins are themselves supplied with lubricant by a main supply ramp of the internal network 106, via main bearings of the crankshaft. Lubricant is emitted from the crankshaft by the crank pins, so as to lubricate the bearing of each crankshaft and the main bearings, while creating a lubricant mist at the segment-piston-liner zone. In other words, the crankshaft receives the lubricant from a main boom and redistributes it to the rod bearings.
- the internal network 106 includes lubricant washers, not shown, which are disposed within the lower motor 7 and spit lubricant under the pistons for the purpose of cooling them.
- the pump 103 is preferably actuated by the crankshaft, which represents the drive shaft 108 of the pump 103 from the lower engine 7. Thus, when the engine 3 is running, the crankshaft rotates and drives the engine. pump 103 in a systematic way.
- the pump 103 is preferably variable flow and controlled pressure, so that its energy consumption is particularly low for pumping the lubricant.
- the built-in motor 5 which is not illustrated in detail, comprises a cylinder head, enclosing a distribution system including air and fuel distribution members to the cylinders.
- the cylinder head caps the engine block of the lower engine via a cylinder head gasket of the engine 3, the cylinder head gasket being the boundary between the high-engine 5 and the low-engine 7.
- the high-engine 5 also defines a combustion chamber for each cylinder, each combustion chamber being formed by a space between the top of each piston at top dead center, its respective cylinder and the cylinder head.
- Each combustion chamber comprises intake ports, through which the air and fuel inlet, generally referred to as the intake fluid, is conducted.
- Each combustion chamber is the seat of combustion reactions of the intake fluid producing a product of combustion or exhaust gas, exhausted by exhaust ports of the combustion chamber concerned. This combustion generates a reciprocating movement of the piston to drive the crankshaft.
- the distribution system of the high-engine 5 includes intake and exhaust valves, which each change between an open position or closing one of the intake or exhaust ports respectively.
- the dispensing system also includes at least one control shaft, of the camshaft type, for controlling these valves. Each control shaft is driven by the crankshaft.
- the motorization system comprises a mixed cooling and lubrication system, comprising a mixed circuit 9.
- the mixed circuit 9 is fluidly separated from the lubrication circuit 105 of the lower engine 7 and contains a mixed liquid of a composition different from that of the lubricant of the lower-motor 7.
- the mixed liquid is circulated in the mixed circuit 9 according to the arrows indicated in FIG.
- the mixed liquid has a dual function of coolant, i.e. a coolant function, and lubricating liquid.
- This mixed liquid may be in the form of an emulsion, especially based on oil and water.
- Lubricants formulated with water such as those used for metalworking, are generally obtained from an anhydrous composition comprising at least one lubricating base oil chosen from oils of mineral or synthetic origins belonging to the groups I, II, III, IV or V according to the classes defined in the API classification (or their equivalents according to the ATIEL classification), at least one performance additive, preferably chosen from extreme pressure additives, anti-wear additives, anti-foam additives, anti-corrosive additives or different fatty substances of the lubricating base oils and at least one emulsifier.
- This emulsion is preferably in the form of an oil-in-water emulsion, with a content by weight of water that may vary from 1% to 99%, preferably from 70% to 95% relative to the total weight of the emulsion.
- the mixed liquid and the lubricant of the lower motor 7 are of the same composition.
- the mixed circuit 9 comprises a high-engine lubrication branch 1 1, a high-motor cooling branch 5, a low-motor cooling branch 7 and, optionally, a cooling branch 17 of the compressor 35.
- the various branches 1 1, 13, 15 and 17 of the mixed circuit 9 are shunted relative to each other, and confluent to a branch 19 of the mixed circuit 9.
- the branches 1 1, 13, 15 and 17 being fluidly connected at the branch 19, the same mixed liquid circulates in all the branches of the mixed circuit 9.
- the mixed circuit 9 also comprises a reserve of mixed liquid 21, distinct from the lubricant supply 107, supplied with mixed liquid by a main return branch 23 of the mixed circuit 9, the return branch 23 being fluidly connected to the branch 19 Alternatively, all or part of the branch 19 can be formed at the level of the reserve 21, without the return branch 23.
- the branch 19 is formed outside the engine 3 and the compressor 35, in a single junction of all the branches 1 1, 13, 15 and 17 of the mixed circuit 9.
- the branch 19 may comprise a first junction 20A, in which only the limbs 1 1 and 13 of the upper motor 5 confluence, an intermediate return branch 22 from this junction 20A.
- the intermediate return branch 22 joins with the other cooling branches 15 and 17 at a second junction 20B of the branch 19, separated from the first junction 20A and provided outside the engine 3 and the compressor 35.
- the first junction 20A is then advantageously formed in the high-engine 5, in particular being formed directly in the cylinder head of the latter.
- the design of the cylinder head is simplified to the extent that the discharge pipes of the two branches 13 and 15 are combined into one from the junction 20A.
- the first junction 20A can be formed out of the upper motor 5, while being connected to the second junction 20B by the intermediate return leg 22.
- two or all of the cooling branches 13, 15 and 17 represented by shunting in FIG. 1, can be provided in series and thus form a combined cooling branch of the high-engine 5, the low-engine 7 and or compressor 35, this combined cooling branch confluent with the lubrication branch January 1 at the branch 19.
- the combined cooling branch can meander between the low-motor 7 and the high-motor 5, that is to say that the combined branch comprises a first part, extending, for example, in the upper part. -motor 5, a second successive part extending in the lower-motor 7, and a third successive portion extending in the high-engine 5.
- the circuit 9 comprises an array of cooling branches forming a network including parts in series or in parallel, for cooling any mechanical member to be cooled by the drive system 1.
- the lubrication branch 11 of the upper motor 5 comprises an internal lubrication network 25 which extends into the upper motor 5 forming a network of galleries for lubricate mechanical connections of the high-engine 5.
- the internal network 25 includes the control shaft and its connections in rotation with the cylinder head, which project mixed liquid into the cylinder head.
- the mechanical connections lubricated by the mixed liquid of the upper motor 5 are in particular rotational connections, for example bearings, between each control shaft and the cylinder head, as well as drive links of the valves by the control shaft.
- these drive links each include a cam of the control shaft and a pusher of the valve concerned, actuated in translation by the cam.
- the branch 19 is situated downstream of this internal network 25, considering the direction of flow of the mixed liquid in the mixed circuit 9.
- the compressor 35 is designed to compress all or part of the intake fluid before it enters the combustion chambers of the high-engine 5.
- the compressor 35 which is not illustrated in detail, comprises a rotating compression member, of the centrifugal pump type, for compressing the intake fluid.
- the compressor 35 preferably forms a turbocharger, that is to say it further comprises a turbine which captures a portion of the enthalpy and / or the kinetic energy of the exhaust gases to drive the engine. compression member.
- the motorization system 1 also comprises a compressor lubrication system, which comprises a lubrication circuit 1 supplying the compressor with a lubricant, of the oil type, different from the lubricant of the circuit 105 and the mixed liquid of the mixed circuit 9, in its nature and / or its composition and / or characteristics.
- the circuit 1 15 is fluidly separated and distinct from the lubrication circuit 105 and the mixed circuit 9.
- the lubricant of the lower motor 7 and that of the compressor 35 are of the same composition.
- the lubrication system of the compressor 35 also comprises a secondary pump 1 13, of the hydraulic pump type, for circulating the lubricant in the secondary circuit 1 15.
- the circuit 1 15 preferably includes a reserve of secondary lubricant 1 17 which is distinct. of the lubricant reservoir 107.
- the secondary circuit 1 comprises an internal lubrication network 1 16 which extends within the compressor 35 in order to lubricate the mechanical connections to be lubricated of the compressor 35, in particular the connections in rotation of the member, and if necessary, the turbine.
- the lubrication system of the compressor 35 comprises an electric motor 1 19, or at least one actuator supplied with electrical energy, driving the pump 1 13 by means of a drive shaft 1 18.
- the energy power supply the electric motor 1 19 is, for example, provided by an electric battery of the motorization system 1.
- the electric motor 1 19 thus constitutes an actuator mechanically independent of the movements of the crankshaft, connecting rods, pistons, valves and the control shaft.
- the operation of the lubrication systems of the low-engine 7 and the compressor 35 can thus be driven separately, in order to improve the lubrication of the compressor 35 and thus lower the fuel consumption of the engine system 1.
- a single common lubrication system may be provided for the lower motor 7 and the compressor 35, such a lubrication system comprising a single lubrication circuit comprising both the internal lubrication network 1 16 and the internal lubrication network.
- the cooling branch 13 of the high-engine 5 comprises an internal cooling network 27, which extends in the upper motor 5 fluidly separated from the internal lubrication network 25.
- the internal cooling network 27 forms a network of galleries which extends in particular within, along and / or around mechanical members to be cooled from the top-motor 5.
- the expression "mechanical member to be cooled” designates not only mechanical parts to be cooled but also possible mechanical connections to cool. These mechanical organs to be cooled include in particular the various components of the distribution system such as the valves, each control shaft, as well as the part of the cylinder head adjacent to the combustion chambers. It is preferred to cool at least the hottest areas of the high-engine 5, especially around the combustion chambers. Branch 19 and, if applicable, junction 20A, is located downstream of the internal cooling network 27.
- the cooling branch 15 of the lower engine 7 comprises an internal cooling network 29, which extends in the lower engine 7 fluidly separated from the internal lubrication network 106.
- the internal cooling network 29 forms a network of galleries which extends in particular within, along and / or around mechanical members to be cooled lower motor 7.
- the internal network 29 extends around the cylinders and within the engine block. It is preferred to cool at least the hottest areas of the low-engine 7, including the cylinders.
- the branch 19 is located downstream of this internal cooling network 29.
- the cooling branch 17 of the compressor 35 comprises an internal cooling network 31, which extends in the compressor 35 in a fluidly separated manner from the internal lubrication network 1 16.
- the internal cooling network 31 form a network of galleries which extends in particular within, along and / or around mechanical members to be cooled compressor 35.
- the internal network 31 extends around the rotating compression member, in the body of the compressor 35 and close to the internal lubrication network 1 16 to prevent any coking phenomenon that may occur within this internal lubrication network 1 16.
- the branch 19 is located downstream of this internal cooling network 31.
- the mixed circuit 9 comprises other cooling branches for cooling other members of the motorization system 1.
- the motorization system 1 comprises pumping means 34 of the mixed liquid, which are common for the cooling branches 13, 15 and 17 and for the lubrication branch 11 of the high-engine 5. This mutualization of the pumping means for the cooling and lubrication can save one or more pumps, while maintaining a separate lubrication of the various parts of the engine system 1.
- the pumping means 34 comprise a two-stage pump, which comprises a first pumping stage 37, a second pumping stage 39 and a common actuator 41 driving both the first stage 37 and the second stage 39.
- the first stage 37 When the actuator 41 is running, the first stage 37 induces a flow D37 and a mixed liquid pressure P37 in the lubrication branch 11 of the high-motor 5.
- the respective value of the flow rate D37 and the pressure P37 can be varied by adjusting the speed of the common actuator 41.
- the second stage 39 When the actuator 41 is in operation, the second stage 39 induces a flow D39 and a mixed liquid pressure P39 in a supply branch 43 of the mixed circuit 9, the initial branch branching into the different cooling branches 13, 15 and 17 above, at separation junctions 45 and 47.
- the respective value of the flow D39 and the pressure P39 can be varied by adjusting the speed of the common actuator 41, which at the same time varies the respective value of the flow rate D37 and pressure P37.
- the first stage 37 and the second stage 39 are configured so that the value of the flow D39 is greater than that of the flow D37 and for the value of the pressure P39 to be lower than that of the pressure P37 when the common actuator 41 is in operation in a predetermined speed range, or for any speed of the common actuator 41.
- the value of the flow and the pressure of the mixed liquid is adapted according to the part of the mixed circuit 9 concerned, depending on whether the mixed liquid serves as lubricant or heat transfer liquid.
- a higher flow value D39 and a lower pressure value P39 are preferred than for lubrication. Higher pressure and lower flow rate with the same mixed liquid ensure proper lubrication.
- the common actuator 41 is preferably an electric motor powered by an electric battery of the motorization system 1. Alternatively, the common actuator operates using a different energy than the electrical energy. In any case, this common actuator, whether electric or not, is preferably mechanically independent of the movements of the crankshaft, connecting rods, pistons, control shafts and valves, so that it can be controlled independently of the operation. of the motor 3.
- the independence of the control of the common actuator 41 relative to the engine 3 optimizes the efficiency of the drive system 1 by adapting both the cooling of the cooled parts by the mixed circuit 9 and lubrication of the built-in motor 5 by controlling and adjusting this common actuator 41, without being slaved to the operation of the engine 3 and / or the compressor 35.
- the common actuator 41 can circulate the mixed liquid in the circuit 9 during a certain period of time, just before the start of the engine 3 and / or just after stopping the engine 3, depending on the application.
- this single pump makes it possible to ensure both the cooling of the system 1 and the lubrication of the high-engine 5 with the mixed liquid, which is particularly economical. compared to the installation of two separate pumps to separately perform the same two functions.
- the mixed circuit 9 advantageously comprises a filtration system of the mixed liquid, not shown.
- the mixed circuit 9 comprises a heat exchange system 33, located for example on the supply branch 43, for thermoregulating or cooling the mixed liquid before entering the various internal cooling networks. 27, 29 and 31.
- the heat exchange system 33 can be to present in another way, especially in the case where the mixed circuit comprises a combined cooling branch.
- the mixed circuit 9 may be devoid of its cooling branch 17, the compressor 35 being able to be cooled by a cooling or lubricating circuit separated from the mixed circuit 9, in particular by the lubrication circuit 1 15.
- the motorization system 1 is devoid of compressor 35 and its lubrication system, as well as of the cooling branch 17.
- branch 19 corresponds to that of the embodiment variant of the first embodiment, in dashed lines of FIG. 1, including the junction 20A, the intermediate return branch 22 and the separate junction 20B.
- the supply branch 43 has the separation junction 45 and is devoid of the separation junction 47.
- the mixed circuit 9 may be devoid of its cooling branch 15, the low-motor 7 being able to be cooled by a separate circuit of the mixed circuit 9.
- the various embodiments and variants of the motorization system 1 described above allow to implement a lubrication and cooling process in which at least the lower motor 7 is lubricated by putting into circulation the lubricant in the lubrication circuit 105 by means of the pump 103, and in which the high-engine 5 is lubricated and cooled by circulating a mixed liquid in the mixed circuit 9, using the pumping means 34.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1657968A FR3055359B1 (fr) | 2016-08-26 | 2016-08-26 | Systeme de motorisation, haut-moteur et procede de lubrification et de refroidissement associe |
| PCT/EP2017/071393 WO2018037101A1 (fr) | 2016-08-26 | 2017-08-25 | Système de motorisation et procédé de lubrification et de refroidissement associé |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3504403A1 true EP3504403A1 (fr) | 2019-07-03 |
Family
ID=57045202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17764771.6A Withdrawn EP3504403A1 (fr) | 2016-08-26 | 2017-08-25 | Système de motorisation et procédé de lubrification et de refroidissement associé |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3504403A1 (fr) |
| FR (1) | FR3055359B1 (fr) |
| WO (1) | WO2018037101A1 (fr) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS586908U (ja) * | 1981-07-06 | 1983-01-17 | トヨタ自動車株式会社 | エンジンの潤滑装置 |
| JPS6125906A (ja) * | 1984-07-16 | 1986-02-05 | Fuji Heavy Ind Ltd | エンジンの潤滑装置 |
| JPS62195613U (fr) * | 1986-05-30 | 1987-12-12 | ||
| FR2605677B1 (fr) | 1986-10-24 | 1990-09-14 | Renault | Dispositif de graissage pour moteur a combustion interne |
| JPH04111505U (ja) * | 1991-03-15 | 1992-09-28 | 本田技研工業株式会社 | 内燃機関における給油装置 |
| JP6259688B2 (ja) * | 2014-03-14 | 2018-01-10 | 大豊工業株式会社 | 潤滑油供給機構 |
-
2016
- 2016-08-26 FR FR1657968A patent/FR3055359B1/fr not_active Expired - Fee Related
-
2017
- 2017-08-25 WO PCT/EP2017/071393 patent/WO2018037101A1/fr not_active Ceased
- 2017-08-25 EP EP17764771.6A patent/EP3504403A1/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| FR3055359B1 (fr) | 2020-06-19 |
| FR3055359A1 (fr) | 2018-03-02 |
| WO2018037101A1 (fr) | 2018-03-01 |
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