• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a waste heat utilization system for a motor vehicle with an internal combustion engine, wherein the waste heat recovery system comprises a feed pump. According to the invention, at least one temperature sensor (Ta, TA) is arranged in the waste heat utilization system for direct or indirect detection of the current working medium temperature. The at least one temperature sensor (Ta, TA) is connected to a control unit (S) for controlling a pump drive. At least one temperature threshold is set in the controller (S), which is compared to the current working medium temperature. If a temperature threshold value is undershot by means of the control unit (S), the pump drive and thus the pump delivery is deactivated and the pump delivery is switched on when this temperature threshold value or a higher second temperature threshold defined in relation to this temperature threshold value is exceeded.
    公开号:AT513999A1
    申请号:T137/2013
    申请日:2013-02-25
    公开日:2014-09-15
    发明作者:Gottfried Raab；Josef Klammer；Stefan Robausch
    申请人:MAN Truck & Bus Österreich AG；
    IPC主号:
    专利说明:

    ·· · · · ··
    1 • · · • · · • ·
    MAN Truck & Bus Austria AG 3.3950 AT pr 20.02.2013
    description
    Waste heat recovery system, in particular for a motor vehicle, with a feed pump
    The invention relates to a waste heat utilization system, in particular for a motor vehicle with internal combustion engine, with a feed pump according to the preamble of claim 1, a vehicle according to claim 16 and a method according to claim 17.
    In a well-known system for the use of waste heat in a motor vehicle, pressure and flow are provided by a feed pump, which is often referred to as a feedwater pump without being limited to the respective working medium. The types of such feed pumps may be different, for example axial piston pumps, axial piston variable displacement pumps, diaphragm piston pumps, to name just a few examples. These pumps can be driven electrically or mechanically in a generally known manner.
    In the mechanical coupling to the internal combustion engine, the pump speed is coupled via an over- or reduction to the engine speed, whereby the available flow and the pump discharge pressure are predetermined depending on the pump characteristics. Thus, in the case of a feed pump driven mechanically by the internal combustion engine, mass flows of the working medium are available at different operating points, for example during a warm-up process, which are not always completely required. If the mass flow which is inevitably made available by the feed pump because of the speed coupling is not required, it is immediately returned to the working medium tank. The necessary energy for the additionally pumped media mass flow must be provided by the
    Internal combustion engine are provided and causes an unfavorable
    Fuel consumption. 1/20 2 • · t • * • • • • • • • •
    MAN Truck & Bus Austria AG 3.3950 AT pr 20.02.2013
    Another problem with operating a feed pump in a waste heat recovery system of a motor vehicle is that water-based media, in particular water with or without organic additives can be used as working media. These media have the negative property that they freeze to a hard body at low temperatures in conjunction with a volume increase. Feed pumps are not suitable for operation with frozen working medium and can be damaged, which in the worst case can lead to a permanent total failure.
    The object of the invention is therefore to develop and equip a waste heat recovery system, in particular for a motor vehicle with internal combustion engine, with a feed pump so that damage protection for the feed pump at low temperatures and / or an energetically optimized use can be achieved.
    This object is achieved with the features of the independent claims. Advantageous embodiments of this are the subject of the dependent claims.
    According to the invention, at least one temperature sensor for direct or indirect detection of the current working medium temperature is arranged in the waste heat utilization system. The at least one temperature sensor is connected to a control unit for controlling a pump drive, wherein in the control unit at least one temperature threshold value is predetermined, which is compared with the current working medium temperature. If a temperature threshold is exceeded, the control unit deactivates the pump drive and thus the pump delivery. If this temperature value is exceeded or a higher temperature threshold is defined than this temperature threshold, the pump delivery is switched on. For damage protection of the feed pump at low temperatures, the temperature threshold is selected according to the freezing temperature of the working medium. If this temperature threshold is undershot, it can be assumed that frozen working medium is contained or is formed in the feed pump. By means of the control unit, the pump drive and thus the pump delivery is deactivated in this operating state. In order to exclude oscillation between switching off and switching on to this temperature threshold, a second switch should be set for the switch-on procedure. "2 999 9 9 9 9 9 9 · 99 9 9 9 9 9 99 999 9 9 9999
    MAN Truck & Bus Austria AG 3 3.3950 AT pr 20.02.2013
    Temperaturschwellwert be provided in accordance with a two-step control with a switching distance above the first temperature threshold.
    In order to obtain the most accurate information possible about a current working medium temperature, a temperature sensor should be located directly in the working medium in the pump area and / or on or in the pump housing.
    In a non-operated, parked motor vehicle is formed at freezing conditions for the working fluid at least a frozen residual amount in the feed pump. This should therefore be designed so that no pump damage occurs when the pump is deactivated. With the control according to the invention it is ensured that in this state, the feed pump does not start and can be damaged or the feed pump must work against the frozen working fluid.
    In order to get as fast as possible from the existing state with a frozen working fluid to a start of the internal combustion engine to a permissible and trouble-free operation of the feed pump, it is proposed to connect them to the heating of the engine cooling circuit. In particular, while the cooling liquid can be passed through channels of the housing of the feed pump, so that the frozen working fluid contained in the feed pump thaws and liquefies quickly. After reaching the switch-on temperature threshold value, the feed pump is then started automatically. The flow of the cooling liquid through the feed pump can optionally be interrupted and switched off again as a function of the working medium temperature, in particular if the working medium has thawed.
    The inventive arrangement and control is suitable for a pump drive, which consists of a mechanical transmission device for direct transmission of rotation of the internal combustion engine to a pump drive shaft. In known manner, such a direct mechanical drive can be realized with a driven gear on the internal combustion engine and a drive wheel on the pump drive shaft and a rotationally transmitting connection by a belt or other driving means. These are different designs, for example, pulleys, gears, etc., with different associated wrapping means, such as 3/20.
    MAN Truck & Bus Austria AG
    4 3.3950 AT pr 20.02.2013 For example, timing belts, V-belts, chains, etc. known. Further, corresponding direct gear couplings with intermeshing gears are known.
    In a preferred embodiment, a clutch which can be switched by means of the control unit in the pump drive shaft is proposed for deactivating / switching on the pump drive, with which the mechanical coupling to the rotational speed of the internal combustion engine can be interrupted or produced.
    With such a coupling, the pump drive can remain switched off when falling below a temperature threshold at freezing conditions to protect the feed pump until safe operation without frozen working fluid at a corresponding detected temperature above freezing is possible.
    Furthermore, with this clutch, the pump drive may optionally also be deactivated or deactivated if required limit temperatures of the waste heat utilization system are not reached during a warm-up operation in order to be able to operate the waste-heat utilization system. In the warm-up, the operation of the feed pump can thus be energetically optimized by, for example, temporarily switching off the pump drive by means of the clutch.
    Furthermore, the operation of the feed pump can also be energetically optimized in that in braking operation and / or coasting of the internal combustion engine by means of the clutch in a mechanical pump drive, the speed coupling of the feed pump is interrupted to the internal combustion engine: In braking mode of the internal combustion engine, a power output of the expander is undesirable and this is therefore deactivated in braking mode. In order to protect the condenser from overload and to avoid any additional fan drive power required for condensation, the mass flow through the evaporator is reduced. Due to the low heat supply in overrun operation of the internal combustion engine occurs in a mechanical pump drive with a speed coupling to the internal combustion engine without its shutdown excess working fluid, which must be discarded with a negative impact on the energy balance of the waste heat recovery system. This is prevented in detecting such braking and / or overrun operation by the controlled interruption of the pump drive train by means of the clutch. 4/20 • · · · · · · · · · · · · · · · · · · ·····················································
    5 · · · · · · · · · · · · · · · · · · · · · · ····
    MAN Truck & Bus Austria AG 3.3950 AT pr 20.02.2013
    The above-mentioned damage protection for a feed pump at freezing conditions for the working medium can also be used with a feed pump with adjustable delivery volume (variable displacement pump). Instead of a switchable clutch but here at a detected temperature at the freezing point of the working medium, the feed pump can be automatically set by means of the scheme to zero promotion, or prevented at start of the feed pump that promotes the pump against the frozen medium.
    Furthermore, a vehicle and a method are claimed. The resulting advantages have already been explained in detail before.
    Reference to a drawing embodiments of the invention are explained in detail.
    Show it:
    Fig. 1 shows an arrangement and control of a feed pump in one
    Waste heat recovery system of a motor vehicle with decoupled, mechanical pump drive by an internal combustion engine,
    Fig. 2 shows an arrangement and control of a feed pump in one
    Waste heat recovery system of a motor vehicle with electric pump drive, and
    Fig. 3 shows an arrangement and control of a feed pump in one
    Waste heat recovery system of a motor vehicle with mechanical drive of a pump with adjustable delivery volume.
    In Fig. 1, a feed pump 1 in a waste heat recovery system of a motor vehicle with an internal combustion engine 2 is shown schematically. The waste heat utilization system itself is not shown but only two connecting lines as inlet 3 and outlet 4 of the feed pump 1 for a water-based working medium. The feed pump 1 has a pump drive shaft 5 with a switchable coupling 6 and an end-side 5/20 • ···· * · · · * «< ························································································································································································································
    MAN Truck & Bus Austria AG 6 3.3950 AT pr 20.02.2013
    Pulley 7. The pulley 7 is associated with a further pulley 8, which is driven by the engine speed-coupled. The two pulleys 7 and 8 are connected to a belt 9, whereby the feed pump 1 is mechanically speed-coupled driven by the internal combustion engine 2.
    In addition, a schematically connected to the internal combustion engine 2 coolant inlet 10 and coolant return 11 is shown to channels in the pump housing 12, wherein in the coolant inlet 10 a here exemplary and preferably designed as a solenoid valve 13 valve device is arranged.
    To control the clutch 6 and optionally the solenoid valve 13, a control unit S is provided, to which a temperature sensor TG with downstream temperature threshold unit for freezing conditions of the working medium and a temperature sensor TA are connected downstream temperature threshold unit for detecting operating conditions during a warm-up of the waste heat recovery system. If appropriate, the two temperature threshold units mentioned can also be connected to a common temperature sensor.
    In addition, the control unit S, a signal B is supplied, which detects a braking and / or overrun operation of the internal combustion engine.
    The illustrated arrangement and control of the feed pump 1 essentially has the following function:
    Under normal ambient and operating conditions, the clutch 6 and the solenoid valve 13 are closed. If freezing conditions for the working fluid are detected via the sensor TG, the clutch 6 is opened via the control line 14 and thus the drive train to the feed pump 1 is interrupted.
    Even when detected with the sensor TA warming the waste heat recovery system when required limit temperatures of the system have not been reached, the clutch 6 is kept open by the control unit S. In addition, at least at detected freezing conditions by the control unit S, the solenoid valve 13 6/20 • ························································································· ··· · ♦ ···· 7 • ·
    MAN Truck & Bus Österreich AG 3.3950 AT pr 20.02.2013 in order to achieve the fastest possible "thawing" of frozen working fluid due to the heating up of the coolant.
    With the signal B, the control unit S a braking and / or overrun operation is displayed, in which also the clutch 6 is opened.
    In Fig. 2, an alternative second arrangement is shown, in which the feed pump 1 but not speed-coupled from an internal combustion engine 2 but directly from a (schematically illustrated) electric motor 15 is driven. Again, the feed pump 1 has an inlet 3 and a drain 4 for the working fluid. Channels in the pump housing 12 are also connected to a coolant inlet 10 with a solenoid valve 13 and a coolant return 11. With a regulator R here the delivery volume of the feed pump 1, in particular regulated by changing the speed of the electric motor 15 as needed, including the controller R further information about the relevant operating conditions in the waste heat recovery system (shown by arrows 16) receives.
    In addition, a temperature sensor TG is connected to the controller R, which are detected in conjunction with a threshold value in the controller R freezing conditions for the working fluid at the feed pump. In such a freezing condition, a zero promotion of the feed pump 1 is set with the controller R, whereby the electric motor 15, the feed pump 1 does not drive. Thus, it can be achieved that here also the feed pump 1 and optionally other components in
    Waste heat recovery system by frozen working medium no damage.
    In Fig. 3, an alternative third arrangement is shown, in which the feed pump 1 is driven by a mechanical engine speed-coupled by an internal combustion engine 2 and the feed pump 1 is designed as a pump with adjustable delivery volume. Again, the feed pump 1 has an inlet 3 and a drain 4 for the working fluid. Channels in the pump housing 12 are also connected to a coolant inlet 10 with a solenoid valve 13 and a coolant return 11. With a regulator R is here the delivery volume of the feed pump 1, in particular by adjusting the
    Pump flow rate controlled according to demand, to which the controller R further information 7/20 ······················································································· · «·· ·« 0 ··· · · «♦ ······ ··· ·· ····
    MAN Truck & Bus Österreich AG 8 3.3950 AT pr 20.02.2013 on the relevant operating conditions in the waste heat recovery system (shown by
    Arrows 16).
    In addition, a temperature sensor TG is connected to the controller R, with the freezing conditions for the working medium at the feed pump 5 are detected in connection with a threshold value in the controller R. In such a freezing condition, a zero promotion of the feed pump 1 is set with the controller R, whereby no medium is conveyed even when driven feed pump. Thus, it can be achieved that here take the feed pump 1 and possibly other components in the waste heat recovery system by frozen working fluid no harm. 8/20 «« • · · · · · · «· · · · · · · · ·
    ······ ·· ···· 9 · ·
    MAN Truck & Bus Austria AG 3.3950 AT pr 20.02.2013
    LIST OF REFERENCE NUMERALS 1 Feed pump 2 Internal combustion engine 5 3 Feed, working medium 4 Drain working medium 5 Pump drive shaft 6 Coupling 7 Pulley 10 8 Pulley 9 Timing belt 10 Coolant inlet 11 Coolant return 12 Pump housing 15 13 Solenoid valve 14 Control line 15 Electric motor 16 Arrows S Control unit 20 R Controller TG Temperature sensor Ta Temperature sensor B Signal 25
    权利要求:
    Claims (17)
    [1]
    ····· ·················································································· · T ··· ·· ··· ··· ·· ···· MAN Truck & Bus Austria AG 10 3.3950 AT pr 20.02.2013 1. Waste heat utilization system, in particular for a motor vehicle with an internal combustion engine having a feed pump (1), characterized in that in the waste heat recovery system at least one temperature sensor (TG, TA) for direct or indirect detection the current working medium temperature is arranged, that the at least one temperature sensor (TG, TA) is connected to a control unit (S) for controlling a pump drive, that in the control unit (S) at least one temperature threshold is preset, which with the current Arbeitsmedium- Temperature is compared, and that when a temperature threshold below the control unit (S), the pump drive and thus the pump delivery are disabled and when exceeding this temperature threshold or a defined relative to this temperature threshold higher second temperature threshold of the pump nantrieb and thus the pump delivery are turned on.
    [2]
    2. Waste heat recovery system according to claim 1, characterized in that the temperature threshold corresponds to the deactivation threshold value of the freezing temperature of the working medium or the second temperature threshold is as turn-on threshold with a switch distance above the first temperature threshold. 10/20 ················································································································································································································································································· ΦΦΦ ΦΦ ΦΦΦφ MAN Truck & Bus Austria AG 11 3.3950 AT pr 20.02.2013
    [3]
    3. Waste heat recovery system according to claim 1 or claim 2, characterized in that the at least one temperature sensor is arranged in the working medium in the pump region and / or on or in the pump housing.
    [4]
    4. Waste heat recovery system according to one of claims 1 to 3, characterized in that the feed pump (1) is designed so that a defined frozen residual amount of working fluid with deactivated pump leads to no pump damage.
    [5]
    5. Waste heat recovery system according to one of claims 1 to 4, characterized in that a housing (12) of the feed pump (1) to the cooling circuit (10, 11) of the internal combustion engine (2) is connected and its flow through the pump housing (12), in particular by means of the control unit (S) as a function of the working medium temperature of the waste heat recovery system, by means of a valve device, in particular by means of a solenoid valve (13), is controllable.
    [6]
    6. Waste heat recovery system according to one of claims 1 to 5, characterized in that the pump drive consists of a mechanical transmission device (7, 8, 9) for transmitting a rotation of the internal combustion engine (2) on a pump drive shaft (5).
    [7]
    7. Waste heat recovery system according to claim 6, characterized in that the mechanical pump drive from a driven gear (8) on the internal combustion engine (2) and a drive wheel (7) on the pump drive shaft (5), which are connected in rotation transmitting by a belting means (9) ,
    [8]
    8. Waste heat recovery system according to claim 6, characterized in that the mechanical pump drive consists of a driven gear on the internal combustion engine (2) and a drive gear on the pump drive shaft (5) which are connected to transmit rotary transmission directly or via one or more intermediate gears. 11/20 ♦ ··· ♦ ···· ·· Μ ······················································································· . Bus Austria AG 12 3.3950 AT pr 20.02.2013
    [9]
    9. waste heat recovery system according to one of claims 1 to 8, characterized in that in the pump drive shaft (5) with the control unit (S) switchable coupling (6) is arranged, with which the coupling to the speed of the internal combustion engine (2) and thus the pump drive can be switched off and switched on.
    [10]
    10. Waste heat recovery system according to claim 9, characterized in that the clutch (6) falls below a temperature threshold at freezing conditions and / or falling below at least one higher temperature threshold during the warm-up of the waste heat recovery system and / or at a detected braking and / or overrun operation of the internal combustion engine (2) opens by means of the control unit (S) and thereby the pump drive is switched off or remains switched off.
    [11]
    11. Waste heat recovery system according to one of claims 1 to 8, characterized in that the pump drive shaft has a permanent coupling to the rotational speed of the internal combustion engine (2) and the pump is designed as a variable displacement pump, with a controllable with the control unit (R) flow rate.
    [12]
    12. waste heat recovery system according to claim 11, characterized in that the pump delivery rate when falling below a temperature threshold at freezing conditions and / or falls below at least one higher temperature threshold during the warming of the waste heat recovery system and / or at a detected braking and / or overrun operation of the internal combustion engine (2) is set to zero by means of the control unit (R).
    [13]
    13. Waste heat recovery system according to one of claims 1 to 5, characterized in that the pump drive consists of an electric drive unit (15).
    [14]
    14. waste heat recovery system according to claim 13, characterized in that the pump speed when falling below a temperature threshold at 12/20 ·· · · · ··········································································· »···· · · · · · · ·» ··· · # · # " * ·· * · * * · t MAN Truck & Bus Austria AG 13 3.3950 AT pr 20.02.2013 Freezing conditions and / or falling below at least one higher temperature threshold during the warming of the waste heat recovery system and / or at a detected braking and / or overrun operation of the internal combustion engine (2) by means of the control unit (R) to zero is set.
    [15]
    15. waste heat recovery system according to one of claims 1 to 14, characterized in that the control unit (S) and / or optionally a control unit (R) for the feed pump (1) is integrated into a higher-level vehicle control unit.
    [16]
    16. Vehicle, in particular motor vehicle and / or utility vehicle, with a waste heat recovery system according to one of the preceding claims.
    [17]
    17. A method for operating a waste heat recovery system, in particular for operating a waste heat recovery system according to one of claims 1 to 15, characterized in that in the waste heat recovery system at least one temperature sensor (TG, TA) for direct or indirect detection of the current working medium temperature is arranged that the at least one temperature sensor (TG, TA) is connected to a control unit (S) for controlling a pump drive, that in the control unit (S) at least one temperature threshold value is predetermined, which is compared with the current working medium temperature, and that at a falling below a Temperature threshold by means of the control unit (S) of the pump drive and thus the pump delivery are disabled and when exceeding this temperature threshold or a defined relative to this temperature threshold higher second temperature threshold of the pump drive and thus the pump promotion gesc are holding. 13/20
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    同族专利:
    公开号 | 公开日
    CN104005829A|2014-08-27|
    RU2641809C2|2018-01-22|
    EP2770170B1|2018-01-31|
    AT513999B1|2015-02-15|
    RU2013155823A|2015-06-27|
    EP2770170A1|2014-08-27|
    CN104005829B|2018-02-09|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JP2010127138A|2008-11-26|2010-06-10|Toyota Motor Corp|Waste heat recovery device of engine|
    WO2013002017A1|2011-06-30|2013-01-03|株式会社豊田自動織機|Rankine cycle|DE102014219487A1|2014-09-25|2016-03-31|Mahle International Gmbh|Pumping device, in particular axial piston pump, for a waste heat utilization device of a motor vehicle|
    DE102014219488A1|2014-09-25|2016-03-31|Mahle International Gmbh|Pumping device, in particular axial piston pump, for a waste heat utilization device of a motor vehicle|US5191766A|1991-06-10|1993-03-09|Vines Frank L|Hybrid internal combustion/steam engine|
    RU2186228C2|2000-05-12|2002-07-27|Закрытое акционерное общество "Волжский дизель им.Маминых"|Device to provide economical operation of heat machine|
    FR2868809B1|2004-04-09|2008-07-04|Armines Ass Pour La Rech Et Le|SYSTEM FOR RECOVERING THE THERMAL ENERGY OF A THERMAL MOTOR VEHICLE BY IMPLEMENTING A RANKINE CYCLE PRODUCING MECHANICAL AND / OR ELECTRICAL ENERGY BY MEANS OF A TURBINE|
    JP2010065587A|2008-09-10|2010-03-25|Sanden Corp|Waste heat utilization apparatus|
    AT509395B1|2010-01-15|2012-08-15|Man Truck & Bus Oesterreich Ag|SYSTEM FOR WASTE USE OF AN INTERNAL COMBUSTION ENGINE WITH FREEZER PROTECTION DEVICE|
    FR2956153B1|2010-02-11|2015-07-17|Inst Francais Du Petrole|DEVICE FOR MONITORING A LOW FREEZING WORK FLUID CIRCULATING IN A CLOSED CIRCUIT OPERATING ACCORDING TO A RANKINE CYCLE AND METHOD USING SUCH A DEVICE|CN105317584B|2015-11-12|2017-03-29|重庆长安汽车股份有限公司|Automobile engine energy-recuperation system and recovery method|
    CN109882279B|2019-02-15|2020-09-08|宁波吉利罗佑发动机零部件有限公司|Chain cooling structure and engine with same|
    法律状态:
    2022-01-15| PC| Change of the owner|Owner name: MAN TRUCK & BUS SE, DE Effective date: 20211123 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA137/2013A|AT513999B1|2013-02-25|2013-02-25|Waste heat recovery system, in particular for a motor vehicle, with a feed pump|ATA137/2013A| AT513999B1|2013-02-25|2013-02-25|Waste heat recovery system, in particular for a motor vehicle, with a feed pump|
    EP13005004.0A| EP2770170B1|2013-02-25|2013-10-18|Waste heat reuse system, in particular for a motor vehicle, with a feed pump|
    RU2013155823A| RU2641809C2|2013-02-25|2013-12-16|Exhaust gas utilisation system, particularly for automobile comprising feed pump|
    CN201410063421.9A| CN104005829B|2013-02-25|2014-02-25|Waste heat utilization system with supply pump, particularly for motor vehicle|
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