DE102010048067A1 - Hydraulic system for vehicle, has hydro pneumatic storage, in which it reduces volume during supplying liquid pressure fluid under increase of pressure - Google Patents
Hydraulic system for vehicle, has hydro pneumatic storage, in which it reduces volume during supplying liquid pressure fluid under increase of pressure Download PDFInfo
- Publication number
- DE102010048067A1 DE102010048067A1 DE102010048067A DE102010048067A DE102010048067A1 DE 102010048067 A1 DE102010048067 A1 DE 102010048067A1 DE 102010048067 A DE102010048067 A DE 102010048067A DE 102010048067 A DE102010048067 A DE 102010048067A DE 102010048067 A1 DE102010048067 A1 DE 102010048067A1
- Authority
- DE
- Germany
- Prior art keywords
- hydraulic system
- heat exchanger
- gas
- vehicle
- fluid under
- 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- Withdrawn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
- 239000012530 fluid Substances 0.000 title claims abstract description 9
- 239000007788 liquid Substances 0.000 title claims abstract description 9
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 title abstract 2
- 238000002485 combustion reaction Methods 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000005457 optimization Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/024—Installations or systems with accumulators used as a supplementary power source, e.g. to store energy in idle periods to balance pump load
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units
- B60K6/08—Prime-movers comprising combustion engines and mechanical or fluid energy storing means
- B60K6/12—Prime-movers comprising combustion engines and mechanical or fluid energy storing means by means of a chargeable fluidic accumulator
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/20—Accumulator cushioning means
- F15B2201/21—Accumulator cushioning means using springs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/40—Constructional details of accumulators not otherwise provided for
- F15B2201/42—Heat recuperators for isothermal compression and expansion
-
- 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
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
Description
Die Erfindung geht aus von einem hydraulischen System mit einem hydropneumatischen Speicher, in dem sich ein mit Gas gefülltes Volumen bei Zufuhr von flüssigem Druckfluid unter Druckerhöhung verkleinert und bei Abfuhr von flüssigem Druckfluid unter Druckerniedrigung vergrößert. Außerdem betrifft die Erfindung ein Fahrzeug mit einem solchen hydraulischen System.The invention is based on a hydraulic system with a hydropneumatic accumulator in which a volume filled with gas decreases when the pressure of liquid pressure fluid is increased, and it increases when the pressure of liquid fluid under pressure is reduced. Moreover, the invention relates to a vehicle with such a hydraulic system.
In Fahrzeugen werden hydraulische Systeme mit einer Hydromaschine und einem Hydrospeicher eingesetzt, um beim Abbremsen des Fahrzeugs ansonsten in nicht wieder verwendbare Wärme umgewandelter Energie zwischenzuspeichern und insbesondere beim Beschleunigen wiederzuverwenden. Darüber hinaus werden in sogenannten Hybridfahrzeugen hydraulische Systeme der genannten Art dazu benutzt, um eine Primärenergiequelle, insbesondere eine Verbrennungsmotor, in einem wirkungsgradoptimalen Bereich zu betreiben. Wird die Leistung, die der Verbrennungsmotor in dem wirkungsgradoptimalen Bereich abgibt nicht für den Antrieb des Fahrzeugs gebraucht, so wird die überschüssige Energie im Speicher gespeichert. Wird mehr Energie benötigt, wird dem Speicher Energie entnommen. Hier ist also das hydraulische System dem Antriebsstrang eines Fahrzeugs zugeordnet.In vehicles hydraulic systems are used with a hydraulic machine and a hydraulic accumulator to caching during braking of the vehicle otherwise in non-reusable heat of converted energy and reuse in particular during acceleration. In addition, in so-called hybrid vehicles hydraulic systems of the type mentioned are used to operate a primary energy source, in particular an internal combustion engine, in an efficiency-optimal range. If the power that the internal combustion engine delivers in the optimum efficiency range is not needed for driving the vehicle, the excess energy is stored in the memory. If more energy is needed, the energy is taken from the memory. So here is the hydraulic system associated with the powertrain of a vehicle.
Hydraulische Systeme mit Hydrospeichern werden jedoch auch in stationären Maschinen und Anlagen genutzt.However, hydraulic systems with hydraulic accumulators are also used in stationary machines and systems.
In herkömmlichen Systemen verlieren die hydropneumatischen Speicher vor allem während der Ruhephasen nach schnellen Ladevorgängen Energie durch Wärmeabgabe an die Umgebung. Bei schnellen Entladevorgängen kann nicht genügend Wärme aus der Umgebung aufgenommen werden, um sich der isothermen Expansion anzunähern.In conventional systems, the hydropneumatic accumulators lose energy by dissipating heat to the environment, especially during rest periods after rapid charging. During rapid discharging, insufficient heat can be absorbed from the environment to approximate the isothermal expansion.
Somit liegt der Erfindung die Aufgabe zugrunde, den Energienutzungsgrad in einem Gesamtsystem, insbesondere die effektive Energiedichte des Speichers, zu erhöhen.Thus, the invention has for its object to increase the energy efficiency in an overall system, in particular the effective energy density of the memory.
Diese Aufgabe wird gelöst durch ein hydraulisches System und durch ein Fahrzeug mit einem hydraulischen System, das einen hydropneumatischen Speicher aufweist, in dem sich ein mit Gas gefülltes Volumen bei Zufuhr von flüssigem Druckfluid unter Druckerhöhung verkleinert und bei Abfuhr von flüssigem Druckfluid unter Druckerniedrigung vergrößert, und bei dem ein Wärmetauscher für eine wenigstens annähernd isotherme Volumenänderung des Gases genutzt wird. Gemäß der Erfindung werden also der Speicherwirkungsgrad und damit der Energienutzungsgrad des Gesamtsystems durch gezielte Kühlung des Gases während eines Ladevorgangs sowie gezielte Wärmeabfuhr während des Entladevorgangs des Speichers verbessert.This object is achieved by a hydraulic system and by a vehicle with a hydraulic system having a hydropneumatic storage in which a gas-filled volume decreases upon supply of liquid pressure fluid under pressure increase and increases in the removal of liquid pressure fluid under pressure reduction, and in which a heat exchanger is used for an at least approximately isothermal volume change of the gas. According to the invention, therefore, the storage efficiency and thus the energy efficiency of the overall system are improved by targeted cooling of the gas during a charging process and targeted heat dissipation during the discharge of the memory.
Vorteilhafte Ausgestaltungen eines hydraulischen Systems gemäß Patentanspruch 1 kann man den Unteransprüchen 2 bis 7 entnehmen.Advantageous embodiments of a hydraulic system according to claim 1 can be found in the dependent claims 2 to 7.
Insbesondere hat das hydraulisches System gemäß Patentanspruch 2 einen ersten Wärmetauscher auf niedrigem Temperaturniveau (Kühler), der bei einer Kompression des Gases genutzt wird, und einen zweiten Wärmetauscher (Erhitzer) auf hohem Temperaturniveau, der bei Expansion des Gases genutzt wird.In particular, the hydraulic system according to claim 2 has a first heat exchanger at a low temperature level (cooler), which is used in a compression of the gas, and a second heat exchanger (heater) at a high temperature level, which is used in expansion of the gas.
Gemäß Patentanspruch 3 wird die korrekte Durchströmung des jeweiligen Wärmetauschers bevorzugt mit Rückschlagventilen sichergestellt.According to claim 3, the correct flow through the respective heat exchanger is preferably ensured with check valves.
Die Effizienz des System ist besonders hoch, wenn in einem Wärmetauscher ein großer Temperaturgradient herrscht in einem Wärmetauscher eine angepasste Wärmekapazität vorhanden ist.The efficiency of the system is particularly high when in a heat exchanger there is a large temperature gradient in a heat exchanger an adapted heat capacity is present.
Vorzugsweise wird für die Abfuhr der Kompressionswärme ein Niedertemperaturkühler eingesetzt.Preferably, a low-temperature cooler is used for dissipating the heat of compression.
In besonders vorteilhafter Weise wird für die Wärmezufuhr während eines Entladevorgangs des Speichers Prozess- bzw. Abwärme, insbesondere die Abwärme eines Verbrennungsmotors genutzt. So kann in einem Fahrzeug als Expansionswärmetauscher ein Abgaswärmetauscher eines Verbrennungsmotors eingesetzt werden.In a particularly advantageous manner, process or waste heat, in particular the waste heat of an internal combustion engine is used for the heat supply during a discharge process of the memory. Thus, in a vehicle as an expansion heat exchanger, an exhaust gas heat exchanger of an internal combustion engine can be used.
Insgesamt sollte ein Gesamtsystem, insbesondere ein Fahrzeug, in angepasster Betriebsweise zur Effizienzoptimierung betrieben werden.Overall, an overall system, in particular a vehicle, should be operated in an adapted mode of operation for efficiency optimization.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010048067A DE102010048067A1 (en) | 2009-10-30 | 2010-10-09 | Hydraulic system for vehicle, has hydro pneumatic storage, in which it reduces volume during supplying liquid pressure fluid under increase of pressure |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009052607.2 | 2009-10-30 | ||
| DE102009052607 | 2009-10-30 | ||
| DE102010048067A DE102010048067A1 (en) | 2009-10-30 | 2010-10-09 | Hydraulic system for vehicle, has hydro pneumatic storage, in which it reduces volume during supplying liquid pressure fluid under increase of pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE102010048067A1 true DE102010048067A1 (en) | 2011-05-05 |
Family
ID=43829061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE102010048067A Withdrawn DE102010048067A1 (en) | 2009-10-30 | 2010-10-09 | Hydraulic system for vehicle, has hydro pneumatic storage, in which it reduces volume during supplying liquid pressure fluid under increase of pressure |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE102010048067A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013112892A1 (en) * | 2012-01-25 | 2013-08-01 | General Compression, Inc. | Device for improved heat transfer within a compression and/or expansion system |
-
2010
- 2010-10-09 DE DE102010048067A patent/DE102010048067A1/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013112892A1 (en) * | 2012-01-25 | 2013-08-01 | General Compression, Inc. | Device for improved heat transfer within a compression and/or expansion system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R005 | Application deemed withdrawn due to failure to request examination |