US20130333381A1 - Internal-combustion engine associated witha rankine cycle closed loop and with a circuit for water injection into the engine intake system - Google Patents
Internal-combustion engine associated witha rankine cycle closed loop and with a circuit for water injection into the engine intake system Download PDFInfo
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- US20130333381A1 US20130333381A1 US13/914,693 US201313914693A US2013333381A1 US 20130333381 A1 US20130333381 A1 US 20130333381A1 US 201313914693 A US201313914693 A US 201313914693A US 2013333381 A1 US2013333381 A1 US 2013333381A1
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- internal
- combustion engine
- rankine cycle
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- heat exchanger
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
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- 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
- F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting from exhaust energy
- F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting from exhaust energy the devices using heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K21/00—Steam engine plants not otherwise provided for
- F01K21/02—Steam engine plants not otherwise provided for with steam-generation in engine-cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/065—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle the combustion taking place in an internal combustion piston engine, e.g. a diesel engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B47/00—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines
- F02B47/02—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines the substances being water or steam
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
- F02G5/02—Profiting from waste heat of exhaust gases
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- 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
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/02—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a heat exchanger
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- 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
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/22—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a condensation chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/022—Adding fuel and water emulsion, water or steam
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/022—Adding fuel and water emulsion, water or steam
- F02M25/025—Adding water
- F02M25/028—Adding water into the charge intakes
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Definitions
- the present invention relates to an internal-combustion engine associated with a Rankine cycle closed loop and a circuit for injecting water into the engine intake system and, more particularly, relates to a gasoline motor vehicle internal-combustion engine for motor vehicles.
- a Rankine cycle is a thermodynamic cycle in which heat from an external heat source is transmitted to a closed loop that contains a working fluid.
- the Rankine cycle generally has a stage in which the working fluid is compressed in an isentropic manner, followed by a stage where the compressed liquid fluid is heated and vaporized on contact with a source of heat.
- the vapor is then expanded, in another stage, in an isentropic manner in an expansion machine, then, in a last stage, the expanded vapor is cooled and condensed on contact with a cold source.
- the loop comprises a compressor pump for circulating and compressing the fluid in liquid form, an evaporator that is swept by a hot fluid for at least partial vaporization of the compressed fluid, an expansion machine for expanding the vapor by converting the energy of the vapor to another energy such as a mechanical or electric energy, and a condenser in which the heat contained in the vapor is provided to a cold source, which is generally the outside air that sweeps this condenser, to convert the vapor to a fluid in liquid form.
- a compressor pump for circulating and compressing the fluid in liquid form
- an evaporator that is swept by a hot fluid for at least partial vaporization of the compressed fluid
- an expansion machine for expanding the vapor by converting the energy of the vapor to another energy such as a mechanical or electric energy
- a condenser in which the heat contained in the vapor is provided to a cold source, which is generally the outside air that sweeps this condenser, to convert the vapor to a fluid in liquid form.
- One solution for injecting water is to provide a tank for storing water and a device for supplying water using a pump and one or more injectors for feeding the water in liquid or vaporized form either into the intake manifold of the engine (indirect injection engine) or into the combustion chamber of the cylinder of this engine (direct injection).
- the exhaust gas contains a large amount of water which is about 7 mass %, essentially in vapor form, and that it is possible to condense about 80% of this water using a cooling power of approximately 20 kW.
- a heat exchanger providing condensation of a very large part of the water vapor present in this exhaust gas is therefore provided on the exhaust gas circulation path, as described in WO-01/92,710.
- the condensed water is then collected in a storage vessel prior to being sent through a distribution system to a system for injecting water into the engine intake system.
- Manufacturers could therefore provide an internal-combustion engine with a Rankine cycle closed loop and a circuit for injecting water into the intake system of the engine.
- the exhaust line already comprises a multiplicity of devices for exhaust gas treatment, such as depollution catalysts, particle filters for particle trapping, lambda type sondes, expansion boxes, etc.
- the space available for an evaporator and a condenser is therefore very limited.
- the size of the evaporator and/or of the condenser has to be limited, which can only reduce their performances and thus degrade the operation of the Rankine cycle loop and/or of the water injection circuit.
- the present invention overcomes the aforementioned drawbacks by a simple and inexpensive layout for the Rankine cycle closed loop and the water injection circuit on the engine.
- the present invention therefore relates to an internal-combustion engine, notably for a motor vehicle, comprising at least one cylinder with a combustion chamber, an air intake and a burnt gas exhaust, comprising a heat exchanger shared with a Rankine cycle closed loop and a circuit for injecting water into the engine intake system.
- the shared heat exchanger can be arranged on the exhaust.
- the shared heat exchanger can be arranged on the exhaust line.
- the shared heat exchanger can be a dual-mode exchanger with an evaporator for vaporizing the working fluid of the Rankine cycle loop and with a condenser for converting to water the water vapor of the exhaust gas for the water injection circuit.
- the shared heat exchanger can comprise an inlet and an outlet for the working fluid of the Rankine cycle loop, as well as an inlet and an outlet for the exhaust gas.
- an internal-combustion engine 10 is associated with a Rankine cycle closed loop 12 and a circuit 14 for injecting water into the engine intake system.
- the internal-combustion engine comprises at least one cylinder 16 with a combustion chamber 18 where the combustion of a fuel mixture occurs, an air intake 20 , here in form of an air intake manifold 21 , and a burnt gas exhaust 22 which conveys burnt gas resulting from the fuel mixture combustion for discharge to the atmosphere.
- the exhaust comprises, by way of example, an exhaust manifold 23 connected to an exhaust line 24 in which the exhaust gas coming from manifold 23 circulates, only a part of exhaust pipe 26 intended for discharge to the atmosphere of the burnt gas resulting from the fuel mixture combustion illustrated.
- This exhaust line carries, advantageously as close as possible to the exhaust manifold, a dual-mode heat exchanger 28 whose purpose is explained more in detail in the description below.
- Rankine cycle closed loop 12 comprises a positive-displacement pump 30 for compressing and circulating a working fluid, such as water, circulating clockwise as shown by arrows C, dual-mode heat exchanger 28 , a receiving expansion machine 32 and a cooling exchanger 34 .
- a working fluid such as water
- the various elements of the loop are connected to one another by fluid circulation lines 36 , 38 , 40 and 42 for connecting successively the pump to the dual-mode exchanger (line 36 ), the dual-mode exchanger to the expansion machine (line 38 ), the expansion machine to the cooling exchanger (line 40 ) and the cooling exchanger to the pump (line 42 ) so that the working fluid, in liquid or vapor form, circulates in the direction shown by arrows C.
- Pump 30 compresses the water between the pump inlet and its outlet where the water, still in liquid form, is at high pressure.
- This pump is advantageously driven in rotation by any known means such as an electric motor (not shown).
- the compressed water is carried through line 36 to inlet 44 of dual-mode exchanger 28 and then it leaves through outlet 46 in form of hot compressed vapor.
- Dual-mode exchanger 28 thus provides an operating mode (evaporator mode) with the phase change of the working fluid of the Rankine cycle loop from the liquid phase to the vapor phase.
- the dual-mode exchanger uses the heat coming from the exhaust gas circulating in exhaust line 24 .
- this exchanger can be a cross-flow exchanger with a flow circulating between water inlet 44 and water vapor outlet 46 , and another flow with a hot exhaust gas inlet 48 and an exhaust gas outlet 50 , from where the exhaust gas is discharged to the atmosphere through the rest of the exhaust line.
- the water vapor coming from outlet 46 of exchanger 28 is then sent through line 38 to expansion machine 32 .
- this expansion machine is an expansion turbine whose rotor (not shown) is driven in rotation by the water vapor.
- This rotor is advantageously connected to any known device allowing use of the recovered mechanical energy, for example a transmission system of a vehicle driving the wheels, or to convert the mechanical energy recovered to another energy, such as an electric generator 52 for example.
- the vapor expanded to a low pressure and leaving expansion machine 32 is carried through line 40 to cooling exchanger 34 .
- This cooling exchanger (or condenser) allows conversion of the expanded low-pressure vapor coming from the turbine to water in liquid form after passing through this condenser.
- this condenser is an assembly of cooling tubes and fins swept by a cooling fluid 54 that flows through the condenser between its inlet face and its outlet face while cooling and condensing the expanded vapor.
- This cooling fluid is here outside air at ambient temperature, but any other cooling fluid such as water can be used for condensing the vapor.
- the water in liquid form leaving the condenser is then sent through line 42 to pump 30 .
- Water injection circuit 14 comprises a water recovery vessel 56 , a water circulation and compression pump 58 , a recovered water buffer tank 60 and a device 62 for injecting the recovered water into the engine intake system.
- the device is in the form of a distribution ramp 64 connected to a multiplicity of injectors 66 for injecting the recovered water into intake manifold 21 or, as shown in dot-and-dash line in the FIGURE, directly into combustion chambers 18 .
- Connecting lines 68 , 70 and 72 are respectively provided between the recovery vessel and the pump, between the pump and the buffer tank, and between the buffer tank and the injection device.
- vessel 56 recovers the condensed water coming from dual-mode exchanger 28 .
- the gas is cooled and the water vapor contained in the gas condenses as droplets. Once these droplets have reached a sufficiently significant mass, they fall into vessel 56 due to gravity.
- Dual-mode heat exchanger 28 thus provides another operating mode (condensation mode) with the conversion through condensation of the water vapor contained in the exhaust gas to water.
- the dual-mode exchanger shared by the two circuits operates according to an evaporation mode for Rankine cycle loop 12 and according to a condensation mode for water injection circuit 14 .
- This condensed water contained in vessel 56 then circulates, under the effect of pump 58 , in lines 68 , 70 prior to reaching buffer tank 60 (approximately 0.2 to 2 liters), from where it is sent to injection device 62 and injected into the engine intake system.
- Buffer tank 60 is thus constantly supplied with water for injection circuit 14 , without requiring any outside manual intervention.
- a water purification device (not shown) allowing to store, in tank 60 , water freed of the major part of the impurities it contained can be provided on line 68 or on line 70 .
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The present invention is an internal-combustion engine, for a motor vehicle, comprising at least one cylinder (16) with a combustion chamber (18), an air intake (20) and a burnt gas exhaust (22). The engine comprises a heat exchanger (28) having a Rankine cycle closed loop (12) and a circuit (14) for injecting water into the engine intake system.
Description
- 1. Field of the Invention
- The present invention relates to an internal-combustion engine associated with a Rankine cycle closed loop and a circuit for injecting water into the engine intake system and, more particularly, relates to a gasoline motor vehicle internal-combustion engine for motor vehicles.
- 2. Description of the Prior Art
- A Rankine cycle is a thermodynamic cycle in which heat from an external heat source is transmitted to a closed loop that contains a working fluid. The Rankine cycle generally has a stage in which the working fluid is compressed in an isentropic manner, followed by a stage where the compressed liquid fluid is heated and vaporized on contact with a source of heat. The vapor is then expanded, in another stage, in an isentropic manner in an expansion machine, then, in a last stage, the expanded vapor is cooled and condensed on contact with a cold source.
- To carry these stages, the loop comprises a compressor pump for circulating and compressing the fluid in liquid form, an evaporator that is swept by a hot fluid for at least partial vaporization of the compressed fluid, an expansion machine for expanding the vapor by converting the energy of the vapor to another energy such as a mechanical or electric energy, and a condenser in which the heat contained in the vapor is provided to a cold source, which is generally the outside air that sweeps this condenser, to convert the vapor to a fluid in liquid form.
- To provide heating and vaporization of the fluid flowing through the evaporator, it is known to use as the hot source the calorific energy conveyed by the exhaust gas of the internal-combustion engine by placing the evaporator on the engine exhaust line, as described in French Patent 2,884,555. This layout improves the energy efficiency of the engine by recovering a large part of the energy lost in the exhaust by converting it to an energy that can be re-used in mechanical or electric form by the engine, its accessories or the vehicle accessories.
- It is also known to inject water into the intake system of an engine in order to lower the combustion temperature of the fuel mixture in the combustion chamber of the engine, which improves the fuel consumption of the engine and limits the discharge of pollutants such as nitrogen oxides (NOx), etc., which increases the engine efficiency by extending the limits of engine knock and the enrichment zone.
- One solution for injecting water is to provide a tank for storing water and a device for supplying water using a pump and one or more injectors for feeding the water in liquid or vaporized form either into the intake manifold of the engine (indirect injection engine) or into the combustion chamber of the cylinder of this engine (direct injection).
- The drawback of this configuration is that it requires a tank of great capacity (ten of liters) which occupies a large volume, which is not often available in motor vehicles. Furthermore, the user of the vehicle is obliged to fill the tank before it is totally empty to prevent engine malfunction due to the absence of water injection into the intake system.
- It has been observed that, for a gasoline engine operating at a richness of 1, the exhaust gas contains a large amount of water which is about 7 mass %, essentially in vapor form, and that it is possible to condense about 80% of this water using a cooling power of approximately 20 kW.
- A heat exchanger providing condensation of a very large part of the water vapor present in this exhaust gas is therefore provided on the exhaust gas circulation path, as described in WO-01/92,710.
- The condensed water is then collected in a storage vessel prior to being sent through a distribution system to a system for injecting water into the engine intake system.
- Increasing the energy efficiency and the engine efficiency of gasoline engines while limiting emissions is an ongoing concern for engine and car manufacturers.
- Manufacturers could therefore provide an internal-combustion engine with a Rankine cycle closed loop and a circuit for injecting water into the intake system of the engine.
- Such a layout is however difficult to achieve due to the installation, at the engine exhaust, and more particularly on the exhaust line, of an evaporator for heating and vaporizing the working fluid of the Rankine cycle loop and of a condenser for converting the water vapor contained in the gas to water.
- Indeed, the exhaust line already comprises a multiplicity of devices for exhaust gas treatment, such as depollution catalysts, particle filters for particle trapping, lambda type sondes, expansion boxes, etc.
- The space available for an evaporator and a condenser is therefore very limited. To allow installation thereof, the size of the evaporator and/or of the condenser has to be limited, which can only reduce their performances and thus degrade the operation of the Rankine cycle loop and/or of the water injection circuit.
- The present invention overcomes the aforementioned drawbacks by a simple and inexpensive layout for the Rankine cycle closed loop and the water injection circuit on the engine.
- The present invention therefore relates to an internal-combustion engine, notably for a motor vehicle, comprising at least one cylinder with a combustion chamber, an air intake and a burnt gas exhaust, comprising a heat exchanger shared with a Rankine cycle closed loop and a circuit for injecting water into the engine intake system.
- The shared heat exchanger can be arranged on the exhaust.
- In cases where the exhaust means comprises an exhaust manifold (23) and an exhaust line (24), the shared heat exchanger can be arranged on the exhaust line.
- The shared heat exchanger can be a dual-mode exchanger with an evaporator for vaporizing the working fluid of the Rankine cycle loop and with a condenser for converting to water the water vapor of the exhaust gas for the water injection circuit.
- The shared heat exchanger can comprise an inlet and an outlet for the working fluid of the Rankine cycle loop, as well as an inlet and an outlet for the exhaust gas.
- Other features and advantages of the invention will be clear from reading the description hereafter, given by way of non imitative example, with reference to the sole FIGURE showing an internal-combustion engine with a Rankine cycle closed loop and a water injection circuit.
- In the FIGURE, an internal-
combustion engine 10 is associated with a Rankine cycle closedloop 12 and acircuit 14 for injecting water into the engine intake system. - The internal-combustion engine comprises at least one
cylinder 16 with acombustion chamber 18 where the combustion of a fuel mixture occurs, anair intake 20, here in form of anair intake manifold 21, and aburnt gas exhaust 22 which conveys burnt gas resulting from the fuel mixture combustion for discharge to the atmosphere. - As can be seen, the exhaust comprises, by way of example, an exhaust manifold 23 connected to an
exhaust line 24 in which the exhaust gas coming from manifold 23 circulates, only a part ofexhaust pipe 26 intended for discharge to the atmosphere of the burnt gas resulting from the fuel mixture combustion illustrated. - This exhaust line carries, advantageously as close as possible to the exhaust manifold, a dual-
mode heat exchanger 28 whose purpose is explained more in detail in the description below. - Rankine cycle closed
loop 12 comprises a positive-displacement pump 30 for compressing and circulating a working fluid, such as water, circulating clockwise as shown by arrows C, dual-mode heat exchanger 28, areceiving expansion machine 32 and acooling exchanger 34. - The various elements of the loop are connected to one another by
fluid circulation lines -
Pump 30 compresses the water between the pump inlet and its outlet where the water, still in liquid form, is at high pressure. - This pump is advantageously driven in rotation by any known means such as an electric motor (not shown).
- The compressed water is carried through
line 36 to inlet 44 of dual-mode exchanger 28 and then it leaves throughoutlet 46 in form of hot compressed vapor. - Dual-
mode exchanger 28 thus provides an operating mode (evaporator mode) with the phase change of the working fluid of the Rankine cycle loop from the liquid phase to the vapor phase. - To achieve this change, the dual-mode exchanger uses the heat coming from the exhaust gas circulating in
exhaust line 24. - By way of example, this exchanger can be a cross-flow exchanger with a flow circulating between
water inlet 44 andwater vapor outlet 46, and another flow with a hotexhaust gas inlet 48 and anexhaust gas outlet 50, from where the exhaust gas is discharged to the atmosphere through the rest of the exhaust line. - The water vapor coming from
outlet 46 ofexchanger 28 is then sent throughline 38 toexpansion machine 32. - By way of example, this expansion machine is an expansion turbine whose rotor (not shown) is driven in rotation by the water vapor. This rotor is advantageously connected to any known device allowing use of the recovered mechanical energy, for example a transmission system of a vehicle driving the wheels, or to convert the mechanical energy recovered to another energy, such as an
electric generator 52 for example. - The vapor expanded to a low pressure and leaving
expansion machine 32 is carried throughline 40 tocooling exchanger 34. This cooling exchanger (or condenser) allows conversion of the expanded low-pressure vapor coming from the turbine to water in liquid form after passing through this condenser. - By way of example, this condenser is an assembly of cooling tubes and fins swept by a
cooling fluid 54 that flows through the condenser between its inlet face and its outlet face while cooling and condensing the expanded vapor. - This cooling fluid is here outside air at ambient temperature, but any other cooling fluid such as water can be used for condensing the vapor.
- The water in liquid form leaving the condenser is then sent through
line 42 to pump 30. -
Water injection circuit 14 comprises awater recovery vessel 56, a water circulation andcompression pump 58, a recoveredwater buffer tank 60 and adevice 62 for injecting the recovered water into the engine intake system. - As illustrated in the FIGURE, by way of example, the device is in the form of a
distribution ramp 64 connected to a multiplicity ofinjectors 66 for injecting the recovered water intointake manifold 21 or, as shown in dot-and-dash line in the FIGURE, directly intocombustion chambers 18. - Connecting
lines - In order to achieve this water injection into the intake system,
vessel 56 recovers the condensed water coming from dual-mode exchanger 28. - Indeed, during the heat exchange between the exhaust gas and the working fluid of the Rankine cycle loop, the gas is cooled and the water vapor contained in the gas condenses as droplets. Once these droplets have reached a sufficiently significant mass, they fall into
vessel 56 due to gravity. - Dual-
mode heat exchanger 28 thus provides another operating mode (condensation mode) with the conversion through condensation of the water vapor contained in the exhaust gas to water. - Thus, the dual-mode exchanger shared by the two circuits operates according to an evaporation mode for Rankine
cycle loop 12 and according to a condensation mode forwater injection circuit 14. - This condensed water contained in
vessel 56 then circulates, under the effect ofpump 58, inlines injection device 62 and injected into the engine intake system. -
Buffer tank 60 is thus constantly supplied with water forinjection circuit 14, without requiring any outside manual intervention. - Advantageously, a water purification device (not shown) allowing to store, in
tank 60, water freed of the major part of the impurities it contained can be provided online 68 or online 70.
Claims (26)
1-30. (canceled)
31. An internal-combustion engine, comprising at least one cylinder with a combustion chamber, an engine air intake and a burnt gas exhaust, including a heat exchanger shared by a Rankine cycle closed loop and a circuit for injecting water into the engine air intake.
32. An internal-combustion engine as claimed in claim 31 , wherein the shared heat exchanger is disposed on the burnt gas exhaust to absorb heat from burnt gas exhaust.
33. An internal-combustion engine as claimed in claim 31 , wherein the burnt gas exhaust comprises an exhaust manifold and an exhaust line.
34. An internal-combustion engine as claimed in claim 32 , wherein the burnt gas exhaust comprises an exhaust manifold and an exhaust line.
35. An internal-combustion engine as claimed in claim 31 , wherein the shared heat exchanger is a dual-mode exchanger with an evaporator for vaporizing the working fluid of the Rankine cycle loop and a condenser for converting water vapor in the burnt exhaust gas into water for water injection by the water injection circuit into the engine air intake.
36. An internal-combustion engine as claimed in claim 32 , wherein the shared heat exchanger is a dual-mode exchanger with an evaporator for vaporizing the working fluid of the Rankine cycle loop and a condenser for converting water vapor in the burnt exhaust gas into water for water injection by the water injection circuit into the engine air intake.
37. An internal-combustion engine as claimed in claim 33 , wherein the shared heat exchanger is a dual-mode exchanger with an evaporator for vaporizing the working fluid of the Rankine cycle loop and a condenser for converting water vapor in the burnt exhaust gas into water for water injection by the water injection circuit into the engine air intake.
38. An internal-combustion engine as claimed in claim 34 , wherein the shared heat exchanger is a dual-mode exchanger with an evaporator for vaporizing the working fluid of the Rankine cycle loop and a condenser for converting water vapor in the burnt exhaust gas into water for water injection by the water injection circuit into the engine air intake.
39. An internal-combustion engine as claimed in claim 31 , wherein the shared heat exchanger comprises an inlet and an outlet for the working fluid of the Rankine cycle loop and an inlet and an outlet for the burnt exhaust gas.
40. An internal-combustion engine as claimed in claim 32 , wherein the shared heat exchanger comprises an inlet and an outlet for the working fluid of the Rankine cycle loop and an inlet and an outlet for the burnt exhaust gas.
41. An internal-combustion engine as claimed in claim 33 , wherein the shared heat exchanger comprises an inlet and an outlet for the working fluid of the Rankine cycle loop and an inlet and an outlet for the burnt exhaust gas.
42. An internal-combustion engine as claimed in claim 34 , wherein the shared heat exchanger comprises an inlet and an outlet for the working fluid of the Rankine cycle loop and an inlet and an outlet for the burnt exhaust gas.
43. An internal-combustion engine as claimed in claim 35 , wherein the shared heat exchanger comprises an inlet and an outlet for the working fluid of the Rankine cycle loop and an inlet and an outlet for the burnt exhaust gas.
44. An internal-combustion engine as claimed in claim 36 , wherein the shared heat exchanger comprises an inlet and an outlet for the working fluid of the Rankine cycle loop and an inlet and an outlet for the burnt exhaust gas.
45. An internal-combustion engine as claimed in claim 37 , wherein the shared heat exchanger comprises an inlet and an outlet for the working fluid of the Rankine cycle loop and an inlet and an outlet for the burnt exhaust gas.
46. An internal-combustion engine as claimed in claim 38 , wherein the shared heat exchanger comprises an inlet and an outlet for the working fluid of the Rankine cycle loop and an inlet and an outlet for the burnt exhaust gas.
47. An internal-combustion engine as claimed in claim 39 , wherein the inlet for the working fluid of the shared heat exchanger is connected to a compressor and circulation pump of the Rankine cycle loop
48. An internal-combustion engine as claimed in claim 40 , wherein the inlet for the working fluid of the shared heat exchanger is connected to a compressor and circulation pump of the Rankine cycle loop
49. An internal-combustion engine as claimed in claim 41 , wherein the inlet for the working fluid of the shared heat exchanger is connected to a compressor and circulation pump of the Rankine cycle loop
50. An internal-combustion engine as claimed in claim 42 , wherein the inlet for the working fluid of the shared heat exchanger is connected to a compressor and circulation pump of the Rankine cycle loop
51. An internal-combustion engine as claimed in claim 43 , wherein the inlet for the working fluid of the shared heat exchanger is connected to a compressor and circulation pump of the Rankine cycle loop
52. An internal-combustion engine as claimed in claim 44 , wherein the inlet for the working fluid of the shared heat exchanger is connected to a compressor and circulation pump of the Rankine cycle loop
53. An internal-combustion engine as claimed in claim 45 , wherein the inlet for the working fluid of the shared heat exchanger is connected to a compressor and circulation pump of the Rankine cycle loop
54. An internal-combustion engine as claimed in claim 46 , wherein the inlet for the working fluid of the shared heat exchanger is connected to a compressor and circulation pump of the Rankine cycle loop/
55. An internal-combustion engine, comprising at least one cylinder with a combustion chamber, an engine air intake and a burnt gas exhaust, including a heat exchanger shared by a Rankine cycle closed loop and a circuit for injecting water into the engine air intake; and wherein
the internal-combustion engine is part of a motor vehicle.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1201729A FR2992021B1 (en) | 2012-06-18 | 2012-06-18 | INTERNAL COMBUSTION ENGINE ASSOCIATED WITH A RANKINE CYCLE CLOSED CIRCUIT AND A WATER INJECTION CIRCUIT FOR THE INTAKE OF THE ENGINE |
FR12/01.729 | 2012-06-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20130333381A1 true US20130333381A1 (en) | 2013-12-19 |
Family
ID=48537912
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/914,693 Abandoned US20130333381A1 (en) | 2012-06-18 | 2013-06-11 | Internal-combustion engine associated witha rankine cycle closed loop and with a circuit for water injection into the engine intake system |
Country Status (4)
Country | Link |
---|---|
US (1) | US20130333381A1 (en) |
EP (1) | EP2677131A1 (en) |
JP (1) | JP2014001734A (en) |
FR (1) | FR2992021B1 (en) |
Cited By (8)
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US20150013333A1 (en) * | 2013-07-11 | 2015-01-15 | Mahle International Gmbh | Heat recovery system for an internal combustion engine |
US20150075163A1 (en) * | 2012-03-07 | 2015-03-19 | Daimler Ag | Waste-Heat Utilisation Device for a Motor Vehicle |
WO2016055413A1 (en) * | 2014-10-06 | 2016-04-14 | Fev Gmbh | Vehicle having a cooler for condensing exhaust gas and method therefor |
CN108141106A (en) * | 2015-10-13 | 2018-06-08 | Ifp新能源公司 | For impeller by the turbine of hot fluid driving rotation and between there is the generator of rotor for being connected to impeller, particularly for the adiabatic apparatus of turbogenerator |
EP3546709A1 (en) | 2018-03-29 | 2019-10-02 | Volvo Car Corporation | Vehicle with system for recovering waste heat |
US10800668B2 (en) | 2018-09-10 | 2020-10-13 | Caterpillar Inc. | Integrated thermal management and water purification system |
CN114233442A (en) * | 2021-12-24 | 2022-03-25 | 中国北方发动机研究所(天津) | Engine with waste utilization function |
EP4293208A1 (en) * | 2022-06-13 | 2023-12-20 | Volvo Truck Corporation | An internal combustion engine system |
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JP2017089587A (en) * | 2015-11-17 | 2017-05-25 | アイシン精機株式会社 | Intake system for internal combustion engine |
US20220250087A1 (en) * | 2018-10-22 | 2022-08-11 | Shanghai Bixiufu Enterprise Management Co., Ltd. | Engine exhaust dust removing system and method |
IT201900018542A1 (en) * | 2019-10-11 | 2021-04-11 | Magneti Marelli Spa | INTERNAL COMBUSTION ENGINE EQUIPPED WITH A WATER-BASED OPERATING LIQUID FEEDING SYSTEM WITH A HEATER DEVICE |
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EP3546709A1 (en) | 2018-03-29 | 2019-10-02 | Volvo Car Corporation | Vehicle with system for recovering waste heat |
US10800668B2 (en) | 2018-09-10 | 2020-10-13 | Caterpillar Inc. | Integrated thermal management and water purification system |
CN114233442A (en) * | 2021-12-24 | 2022-03-25 | 中国北方发动机研究所(天津) | Engine with waste utilization function |
EP4293208A1 (en) * | 2022-06-13 | 2023-12-20 | Volvo Truck Corporation | An internal combustion engine system |
Also Published As
Publication number | Publication date |
---|---|
FR2992021A1 (en) | 2013-12-20 |
JP2014001734A (en) | 2014-01-09 |
FR2992021B1 (en) | 2014-05-30 |
EP2677131A1 (en) | 2013-12-25 |
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