US20170370274A1 - Coolant pump with integrated closed-loop control - Google Patents

Coolant pump with integrated closed-loop control Download PDF

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Publication number
US20170370274A1
US20170370274A1 US15/502,374 US201515502374A US2017370274A1 US 20170370274 A1 US20170370274 A1 US 20170370274A1 US 201515502374 A US201515502374 A US 201515502374A US 2017370274 A1 US2017370274 A1 US 2017370274A1
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Prior art keywords
pump
coolant
pumped
sensor
volume flow
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Abandoned
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US15/502,374
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English (en)
Inventor
Jens Hoffmann
Franz Pawellek
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Nidec GPM GmbH
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Nidec GPM GmbH
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Publication of US20170370274A1 publication Critical patent/US20170370274A1/en
Assigned to NIDEC GPM GMBH reassignment NIDEC GPM GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HOFFMANN, JENS, PAWELLEK, FRANZ
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/08—Combinations of two or more pumps the pumps being of different types
    • F04B23/14—Combinations of two or more pumps the pumps being of different types at least one pump being of the non-positive-displacement type
    • 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
    • F01P3/20—Cooling circuits not specific to a single part of engine or machine
    • 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
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • F01P5/12—Pump-driving arrangements
    • 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
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • 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
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • 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
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P7/164—Controlling of coolant flow the coolant being liquid by thermostatic control by varying pump speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/14—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
    • F04B1/141—Details or component parts
    • F04B1/146—Swash plates; Actuating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/08—Combinations of two or more pumps the pumps being of different types
    • F04B23/10—Combinations of two or more pumps the pumps being of different types at least one pump being of the reciprocating positive-displacement type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/08—Combinations of two or more pumps the pumps being of different types
    • F04B23/10—Combinations of two or more pumps the pumps being of different types at least one pump being of the reciprocating positive-displacement type
    • F04B23/106—Combinations of two or more pumps the pumps being of different types at least one pump being of the reciprocating positive-displacement type being an axial piston pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/12—Combinations of two or more pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0027—Varying behaviour or the very pump
    • F04D15/0038—Varying behaviour or the very pump by varying the effective cross-sectional area of flow through the rotor
    • 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
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • F01P2005/105—Using two or more pumps
    • 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
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P2007/146—Controlling of coolant flow the coolant being liquid using valves
    • 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
    • F01P2025/00—Measuring
    • 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
    • F01P2025/00—Measuring
    • F01P2025/04—Pressure
    • F01P2025/06—Pressure for determining flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/128—Driving means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/021—Units comprising pumps and their driving means containing a coupling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2270/00—Control
    • F05D2270/60—Control system actuates means
    • F05D2270/64—Hydraulic actuators

Definitions

  • the present invention relates to a coolant pump for pumping a coolant for an internal combustion engine in a vehicle comprising the internal combustion engine and a central engine control unit.
  • coolant pumps comprising an electro-hydraulically controlled regulating slide valve for adjusting the volume flow proved to be particularly reliable in the course of these developments.
  • a pump of this design which is now referred to as an ECF (electro-hydraulically controlled flow) pump, is disclosed for example in the German patent specification DE 10 2008 026 218 B4 of the applicant.
  • the volume flow of the coolant to be pumped from a coolant pump is customarily controlled by a central engine control unit ZMS of a vehicle.
  • a position of the regulating slide valve is detected for this purpose and transferred to the central engine control unit ZMS.
  • the central engine control unit ZMS controls an electromagnetic valve in the hydraulic circuit depending on further operating parameters such as the speed of the internal combustion engine, the working load of the combustion engine, the amount of fuel supplied, the temperature and the like.
  • a corresponding number of electric cables from the central engine control unit ZMS to the individual elements of the control circuit is required.
  • at least two cables must be installed for the power supply and for the signal communication both from the central engine control unit ZMS to the position sensor and from the central engine control unit ZMS to the electromagnetic valve.
  • the invention is based on the object of providing a coolant pump which requires minimal effort in terms of installation and which provides a high degree of operational reliability in a corrosive environment.
  • this object is achieved by a coolant pump with the features of claim 1 .
  • This coolant pump is particularly characterised by the fact that it comprises its own pump control which controls a proportional valve in a hydraulic circuit on the basis of the actual value signal from the sensor and a desired value signal from the central engine control unit.
  • the invention therefore provides for the first time in the design of coolant pumps a dedicated control circuit for the position control of a regulating slide valve using a hydraulic actuator.
  • the coolant pump according to the invention therefore comprises fewer electric cables to the central engine control unit than a conventional system.
  • a separate power supply or communication interface between both the central engine control unit ZMS and the electromagnetic proportional valve and the central engine control unit ZMS and a sensor for determining a parameter (such as the position of the regulating slide valve) which is indicative of the volume flow of the pumped coolant.
  • coolant pump's susceptibility to failure can also be improved, since there is no need for corrodible plug connections and/or outlet seals on the pump housing for the wiring in the region of the engine compartment of the vehicle, which is exposed to the effects of the weather and stirred up grit.
  • the central engine control unit does not require a programming procedure for position controlling the regulating slide valve either. As a consequence, the processing load of the central engine control unit can be reduced. Thus, either a central engine control unit with lower processing power at a corresponding lower cost can be used or the unused processing power can be made available for control functions of other peripheral devices, or to achieve an increased frequency of calculation cycles.
  • the pump control and the sensor can be formed as a single electronic component.
  • the integration into one electronic component external wiring to different regions of the pump construction can be dispensed with.
  • the installation of the coolant pump can thereby be simplified and there is no need for corrodible plug connections and/or outlet seals on the pump housing for the wiring.
  • the senor can be a position sensor, in particular a Hall effect sensor, for detecting the position of the regulating slide valve.
  • the desired value signal indicates a predetermined position of the regulating slide valve or a predetermined volume flow and the speed of the combustion engine or coolant pump.
  • the position control can be implemented in the pump control with a simple calculation procedure.
  • the calculating capacity of the pump control as well as the power required and resulting waste heat in an enclosed electronic component can thereby be kept to a minimum.
  • the desired value signal from the central engine control unit indicates a predetermined volume flow and a speed
  • a calculation procedure is performed by the pump control between the volume flow and the position of the regulating slide valve to be controlled depending on the pump speed.
  • the central engine control unit then only transfers as a desired value signal a value corresponding to a volume flow, i.e. an amount of heat to be dissipated.
  • the required heat output can be calculated by the central engine control unit on the basis of the operating parameters of the internal combustion engine. In this way, good compatibility and interchangeability between the coolant pump according to the invention and various central engine control units can be ensured.
  • the pump control in the upper speed range of the pump the pump control can limit the path of the regulating slide valve.
  • the pump control performs a protective function for components such as seals in the cooling system, in order to limit a maximum volume flow and the resulting pressure.
  • the pump control can compare the relationship between the control duration of the proportional valve and a resulting position change of the regulating slide valve with a threshold value. In this way, the pump control carries out autonomous function monitoring to ensure the cooling system has a sufficient fill quantity of coolant.
  • the hydraulic circuit is used as a pressure-sensitive sensor
  • function monitoring can be implemented in the cooling system to ensure the timely detection of leaks without the need for further measuring elements, such as pressure gauges or other sensors, to be provided. This means that the number of components and wires as well as the costs and outlay involved in installation can be kept to a minimum.
  • the senor can be a pressure sensor for detecting the pressure of the pumped volume flow of the coolant.
  • the desired value signal indicates a predetermined volume flow or a pressure which is indicative of the volume flow of the pumped coolant.
  • the pressure sensor can preferably detect a pressure in the pump chamber which is in proportion to the pumped volume flow of the coolant pump.
  • the pump control can compare the pressure detected by the sensor with a threshold value. In this way, it is possible for the pump control of the alternative embodiment to carry out with particular ease autonomous function monitoring with a pressure sensor, to ensure the cooling system has a sufficient fill quantity of coolant.
  • the pump control can comprise a transceiver for receiving data from the central engine control unit and/or for sending data thereto, a microcomputer for performing a control procedure, a valve driver for controlling the proportional valve, and a power supply distributor for supplying each component with electric power.
  • the pump control can have a housing of its own which is integrated into the single electronic component.
  • effective protection against electromagnetic interference from the control circuit to the sensor disposed in the electronic component, such as a Hall effect sensor, can be provided, for example.
  • the senor can have a housing of its own which is integrated into the single electronic component 20 . With this design too, effective protection can be provided against electromagnetic interference from the control circuit to the sensor.
  • the coolant to be pumped can flow through a coolant inlet such that it is directed axially at the impeller and can be pumped by the impeller so as to leave the pump chamber via a radial coolant outlet.
  • the invention therefore makes use of the configuration of a radial pump.
  • the coolant to be pumped can flow through a coolant inlet such that it is directed axially at the impeller and can be pumped by the impeller so as to leave the pump chamber via an axial or semi-axial coolant outlet on the opposite side of the impeller.
  • the invention therefore makes use of the configuration of an axial or a semi-axial pump.
  • An electronic component according to the invention for use in a mechanically driven coolant pump of a vehicle with an internal combustion engine and a central engine control unit comprises a pump control and a sensor for detecting the position of a regulating slide valve in a pump chamber which limits the pumped volume flow or a sensor for detecting the pressure of the volume flow in the pump chamber.
  • the electronics required for the control can therefore be integrated with, exchanged for or retrofitted with a component in the coolant pump.
  • a portion of the electronic component in which the pump control is accommodated and a portion of the electronic component in which the sensor is accommodated can form an L-shaped arrangement with respect to one another.
  • a method for controlling a mechanically driven coolant pump of a vehicle with an internal combustion engine and a central engine control unit comprises the following steps: calculating by way of the central engine control unit the desired value of a parameter, which is indicative of the volume flow of the pumped coolant, depending on operating parameters of the internal combustion engine; transmitting the desired value from the central engine control unit to a pump control of the coolant pump; detecting the actual value of the parameter by a sensor; transmitting the actual value from the sensor to the pump control; and adjusting by way of the pump control the position of a regulating slide valve, which limits the pumped volume flow of the coolant pump, depending on the desired value and the actual value by controlling a hydraulic actuator.
  • the invention makes use of a coolant pump of the aforementioned embodiments.
  • An alternative method for controlling a mechanically driven coolant pump of a vehicle with an internal combustion engine and a central engine control unit comprises the following steps: transmitting operating parameters of the internal combustion engine from the central engine control unit to a pump control of the coolant pump; calculating by way of the pump control a desired value of a parameter, which is indicative of the volume flow of the pumped coolant, depending on the operating parameters of the internal combustion engine; detecting an actual value of the parameter by a sensor; transmitting the actual value from the sensor to the pump control; and adjusting by way of the pump control the position of a regulating slide valve, which limits the pumped volume flow of the coolant pump, depending on the desired value and the actual value by controlling a hydraulic actuator.
  • the invention makes use of a coolant pump of the aforementioned embodiments.
  • the parameter which is indicative of the volume flow of the pumped coolant can be a position of the regulating slide valve. This makes it possible to use the control method for the configuration described above of the coolant pump according to the invention.
  • the parameter which is indicative of the volume flow of the pumped coolant can be the pressure in a pump chamber of the coolant pump which corresponds to the volume flow of the pumped coolant. This makes it possible to use the control method for an alternative embodiment of the coolant pump according to the invention.
  • FIG. 1 is a schematic sectional view of an inner region of the coolant pump and of wiring of the pump control according to the present invention
  • FIG. 2 is a sectional view of a configuration of a coolant pump with a pump control according to the present invention, which is equipped with a plug for connection with a data bus;
  • FIG. 3A is a sectional view of an electronic component into which a position sensor and a pump control according to the present invention are integrated;
  • FIG. 3B shows a perspective view of an electronic component into which a position sensor and a pump control according to the present invention are integrated;
  • FIG. 4 shows a schematic block diagram of the pump control according to the present invention.
  • the coolant pump comprises a pump housing 1 and a pump shaft 4 which is rotatably mounted therein and which includes a pulley 3 driven by an internal combustion engine (not shown) through a belt drive.
  • An impeller 5 which is disposed inside a pump chamber 2 in a flow area of a cooling circuit of the internal combustion engine to induce a volume flow of the coolant, is non-rotatably arranged at a free end of the pump shaft 4 .
  • the coolant is drawn through an axial inlet of the pump chamber 2 in the region of a central radius of the impeller 5 and is ejected, for example, through a radial outlet (not shown) of the pump chamber 2 which is opposite to a peripheral region of the impeller 5 .
  • the flow area of the impeller 5 can be variably covered along a displacement path extending in parallel to the pump shaft 4 by a regulating slide valve 7 with a cylindrical portion 7 a arranged coaxially to the pump shaft and a back wall portion 7 b .
  • a sealing lip 6 extends between the inner peripheral wall of the cylindrical portion 7 a of the regulating slide valve 7 and a rear wall of the pump chamber 2 .
  • the regulating slide valve 7 is in an “open position” in which the flow area of the impeller 5 is not covered.
  • the pump chamber 2 also has arranged therein an axial piston pump 9 on the back side of the impeller 5 and in parallel to the pump shaft 4 , the piston of which is actuated via a sliding block which slides on a wobble plate 8 arranged on the rear side of the impeller 5 so as not to rotate therewith relative to the pump shaft 4 .
  • the axial piston pump 9 draws coolant from the flow area in the pump chamber 2 between the impeller 5 and the regulating slide valve 7 and ejects the coolant under pressure into a hydraulic circuit 11 formed in the pump housing 1 .
  • the hydraulic circuit 11 branches out into two branches 11 a and 11 b .
  • the one branch 11 a of the hydraulic circuit 11 leads, on the one hand, to an electromagnetic proportional valve 13 and back again into the pumped coolant flow.
  • the other branch 11 b of the hydraulic circuit 11 leads to an annular piston 15 which is arranged coaxially with respect to the pump shaft 4 and which assumes the function of a hydraulic actuator along the displacement path of the regulating slide valve 7 .
  • a return spring 17 acts upon the annular piston 15 in a direction opposite to the pressure of the hydraulic circuit 11 , i.e. away from the impeller 5 .
  • the annular piston 15 communicates with the regulating slide valve 7 and moves this toward the impeller 5 as the pressure of the hydraulic circuit 11 increases.
  • the electromagnetic proportional valve 13 When no drive current is supplied, the electromagnetic proportional valve 13 is open such that the coolant drawn by the axial piston pump 9 flows substantially without pressure via the branch 11 a of the hydraulic circuit 11 and through the proportional valve 13 back into the pumped coolant flow. Therefore, no pressure builds up in the branch 11 b of the hydraulic circuit 11 , and the annular piston 15 remains in the unactuated initial position under the action of the return spring 17 . In this case, the regulating slide valve 7 , which communicates with the annular piston 15 , is kept in the “open position”, as is shown in FIGS. 1 and 2 .
  • the cylindrical portion 7 a of the regulating slide valve 7 is increasingly caused to axially overlap the impeller 5 , as a consequence of which an effective flow area of the impeller 5 is radially covered by the cylindrical portion 7 a of the regulating slide valve 7 .
  • the cylindrical portion 7 a completely covers the impeller 5 such that a minimal pumped volume flow is generated regardless of the pump speed in that a flow-effective area of the impeller 5 is completely shielded by the regulating slide valve 7 .
  • Controlling the on and off periods of the electromagnetic proportional valve 13 gives rise to the controlled build-up of backpressure in the branch 11 a , and thus to the controlled build-up of pressure in the branch 11 b of the hydraulic circuit 11 , which acts upon the annular piston 15 and against the return spring 17 .
  • the annular piston 15 moves the regulating slide valve 7 between the “open position” and “closed position” as described above, to adjust the pumped volume flow of the coolant pump.
  • the central engine control unit ZMS calculates the volume flow of the coolant to be pumped, which corresponds to the required heat output of the internal combustion engine, by taking account of various operating parameters such as the speed and working load of the internal combustion engine, the fuel supplied, the temperature, the vehicle speed, and the like.
  • the volume flow of coolant pumped by the coolant pump depends, on the one hand, on the flow effectiveness of the impeller 5 , which decreases around the impeller 5 with an increasing degree of coverage by the cylindrical portion 7 a of the regulating slide valve 7 as the position of the regulating slide valve 7 (and of the annular piston 15 ) is, to an increasing extent, axially shifted towards the “closed position”.
  • the pumped volume flow of the coolant pump depends on the pump speed.
  • the pump speed is invariably dictated by the speed of the internal combustion engine as a result of the belt drive and includes the fluctuations characteristic of vehicle operation.
  • the pump control 21 comprises a transceiver 23 , such as a LIN transceiver, a microcomputer 25 , a valve driver 27 and a power supply distributor 29 .
  • the power supply distributor divides the voltage from a vehicle power source (not shown), such as 12V, into suitable voltages of the electronic components 23 , 25 , 27 of the pump control 21 and supplies these with the required electric power.
  • the LIN transceiver 23 enables data communication via a data bus, e.g. in the UN protocol, between the pump control 21 and the central engine control unit ZMS.
  • a plug 22 can be provided for connection with an on-board data bus linked to the central engine control unit ZMS.
  • the microcomputer 25 carries out a control program with a control procedure which is stored in a memory (not shown) of the microcomputer 25 , and calculates a pulse width modulation as the drive signal of the valve driver 27 .
  • the valve driver 27 amplifies the drive signal from the microcomputer 25 by activating and deactivating, in accordance with the pulse width modulation, the supply of power from the power supply distributor 29 for actuating the electromagnetic proportional valve 13 .
  • the pump control 21 is formed together with a sensor 19 as a single electronic component 20 .
  • a control circuit of the pump control 21 and a sensor circuit can be cast into one enclosed component.
  • the dimensions of the single component of the pump control 21 and sensor 19 do not exceed the dimensions of a conventionally used sensor component, it is moreover possible to upgrade a known ECF pump without modifying the pump construction.
  • the shown configuration can be preferably implemented using a Hall effect sensor as the position sensor 19 .
  • this embodiment is not limited to a Hall effect sensor, as will be described later in a further embodiment.
  • a position sensor 19 is used to detect the position of the regulating slide valve 7 along a displacement path.
  • a contactless and robust construction is provided by a Hall effect sensor and a magnetic transmitter element which is connected to the annular piston 15 .
  • the position sensor 19 outputs to the pump control 21 as an actual value signal the detected position of the annular piston 15 , and accordingly of the regulating slide valve 7 , along the displacement path.
  • the desired value signal which is received by the pump control 21 from the central engine control unit ZMS contains a predetermined position of the regulating slide valve 7 .
  • the central engine control unit ZMS calculates the volume flow of the coolant to be pumped by the coolant pump on the basis of the required heat output of the internal combustion engine.
  • the predetermined position of the regulating slide valve is then calculated depending on the volume flow and the current pump speed, which has a fixed speed ratio relative to the internal combustion engine, and is transmitted to the pump control 21 .
  • the desired value signal which is received by the pump control 21 from the central engine control unit ZMS contains just one desired value for the required volume flow of coolant as well as further operating parameters such as, in particular, the current speed of the internal combustion engine or the corresponding pump speed.
  • the desired value for the resulting position of the regulating slide valve 7 is calculated in the pump control 21 .
  • the control procedure executed in the microcomputer 25 corresponds, for example, to the control function of a PID member with which a deviation is calculated between the predefined desired value and the actual value. Based on this deviation, a pulse width modulation for controlling the electromagnetic proportional valve 13 is calculated on the basis of a system-specific function of the hydraulic circuit 11 , i.e. a response behaviour between the on and off periods of the electromagnetic proportional valve 13 and a resulting position change of the annular piston 15 as a hydraulic actuator.
  • the pressure in the hydraulic circuit 11 is controlled by means of the on and off periods for opening and closing the proportional valve 13 in such a way that an equilibrium corresponding to the predefined desired value of the central engine control unit ZMS is achieved and maintained between the hydraulic pressure and the pressure of the return spring 17 at the position of the annular piston 15 and the regulating slide valve 7 .
  • the actual position of the regulating slide valve 7 is detected by the position sensor 19 and transmitted to the pump control 21 or entered into the microcomputer 25 as feedback for controlling the proportional valve 13 .
  • the pump control 21 carries out function monitoring to autonomously identify and report to the central engine control unit leaks in the cooling system.
  • the simple control loop between the position sensor 19 of the regulating slide valve 7 and the electromagnetic proportional valve 13 in the hydraulic circuit 11 allows the pump control 21 according to the invention to detect deviations in the response behaviour of the hydraulic circuit with the required sensitivity, i.e. particularly without being influenced by further operating parameters such as permanent speed and temperature fluctuations.
  • the pump control 21 compares a deviation from the ratio between the on and off periods of the electromagnetic proportional valve 13 and the resulting position change of the annular piston 15 and regulating slide valve 7 with a threshold value stored in the memory.
  • the threshold value is stored in a memory portion of the pump control 21 , as are other specific parameters of the coolant pump.
  • the pump control 21 If an error is detected, the pump control 21 outputs an error message to the central engine control unit which can, in turn, initiate limited emergency operation or switch off the internal combustion engine.
  • the coolant pump comprises a pressure sensor (not shown), which is preferably arranged between the annular piston 15 and the regulating slide valve 7 , instead of the position sensor 19 .
  • the pump control 21 carries out control in that the regulating slide valve 7 is moved into a new position so as to adjust the volume flow until the actual value signal of the pressure detected by the pressure sensor corresponds to the pressure of the predetermined volume flow, which is predefined by the desired value signal from the central engine control unit.
  • function monitoring of the cooling system can be performed based simply on the existing pressure sensor rather than on the response behaviour of the hydraulic actuator.
  • a threshold value is stored in a memory portion of the pump control. This threshold value corresponds to a minimal operating pressure which is particularly undershot when air becomes trapped in the cooling system. After comparing the desired value with the value detected by the pressure sensor, the pump control 21 evaluates whether there is a leak in the cooling system.
  • the pump control 21 If an error is detected, the pump control 21 outputs an error message to the central engine control unit which can, in turn, initiate limited emergency operation or switch off the internal combustion engine.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
US15/502,374 2014-07-21 2015-07-17 Coolant pump with integrated closed-loop control Abandoned US20170370274A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102014110231.2 2014-07-21
DE102014110231.2A DE102014110231B3 (de) 2014-07-21 2014-07-21 Kühlmittelpumpe mit integrierter Regelung
PCT/EP2015/066472 WO2016012378A1 (de) 2014-07-21 2015-07-17 Kühlmittelpumpe mit integrierter regelung

Publications (1)

Publication Number Publication Date
US20170370274A1 true US20170370274A1 (en) 2017-12-28

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US15/502,374 Abandoned US20170370274A1 (en) 2014-07-21 2015-07-17 Coolant pump with integrated closed-loop control

Country Status (6)

Country Link
US (1) US20170370274A1 (de)
EP (1) EP3172446B1 (de)
KR (1) KR101912801B1 (de)
CN (1) CN106536888B (de)
DE (1) DE102014110231B3 (de)
WO (1) WO2016012378A1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11002281B2 (en) 2017-09-01 2021-05-11 Nidec Gpm Gmbh Controllable coolant pump for a main delivery circuit and a secondary delivery circuit
US11028763B2 (en) * 2019-09-19 2021-06-08 Toyota Jidosha Kabushiki Kaisha Engine cooling device
USD923060S1 (en) * 2018-08-09 2021-06-22 Psg Germany Gmbh Pump
US11181112B2 (en) 2015-11-06 2021-11-23 Pierburg Gmbh Control arrangement for a mechanically controllable coolant pump of an internal combustion engine
US20220099016A1 (en) * 2019-01-15 2022-03-31 Pierburg Pump Technology Gmbh Switchable mechanical motor vehicle coolant pump
USD960203S1 (en) * 2020-09-28 2022-08-09 Hugo Vogelsang Maschinenbau Gmbh Pump for liquids
USD966342S1 (en) * 2020-02-07 2022-10-11 Pedrollo S.P.A. Electric pump

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6671048B2 (ja) * 2015-11-12 2020-03-25 パナソニックＩｐマネジメント株式会社 ポンプ
KR101881029B1 (ko) 2017-03-17 2018-07-25 명화공업주식회사 워터펌프
KR101874493B1 (ko) 2017-03-17 2018-07-05 명화공업주식회사 워터펌프
DE102017118264A1 (de) * 2017-08-10 2019-02-14 Nidec Gpm Gmbh Kühlmittelpumpe mit Hybridantrieb und Steuerungsverfahren
EP3527829B1 (de) 2018-02-19 2022-03-16 Grundfos Holding A/S Pumpensystem und pumpensteuerungsverfahren
DE102018107776B4 (de) 2018-04-03 2020-01-23 Nidec Gpm Gmbh Hybridangetriebene Doppelpumpe
CA3156523A1 (en) * 2019-10-31 2021-05-06 Lovis, Llc Computer-controlled power takeoff driven motorized pump system
CN111102205B (zh) * 2020-01-08 2020-11-20 福州城建设计硏究院有限公司 一种基于地下污水的防卡涩的自吸式排污泵
DE102022116714A1 (de) 2022-07-05 2024-01-11 Pierburg Pump Technology Gmbh Variable mechanische Kraftfahrzeug-Flüssigkeitspumpe

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010054395A1 (en) * 2000-02-16 2001-12-27 Wilo Gmbh Controller for pump and valve
US20090041588A1 (en) * 2007-08-08 2009-02-12 Halliburton Energy Services, Inc. Active valve system for positive displacement pump
US20120204818A1 (en) * 2011-02-15 2012-08-16 Schwabische Huttenwerke Automotive Gmbh Coolant pump which exhibits an adjustable delivery volume
DE102013011209B3 (de) * 2013-07-04 2014-01-23 Geräte- und Pumpenbau GmbH Dr. Eugen Schmidt Regelbare Kühlmittelpumpe
US10400659B2 (en) * 2014-07-21 2019-09-03 Nidec Gpm Gmbh Coolant pump with integrated closed-loop control

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004012383B3 (de) * 2004-03-13 2005-06-02 Faurecia Autositze Gmbh & Co. Kg Steuerungsmodul für eine Fahrzeugsitz-Verstelleinrichtung
JP2007016659A (ja) * 2005-07-06 2007-01-25 Kobelco Contstruction Machinery Ltd 冷却ファンの制御装置
JP2007231907A (ja) * 2006-03-03 2007-09-13 Denso Corp 燃料供給装置
DE102006048255A1 (de) * 2006-10-12 2008-04-17 Zf Friedrichshafen Ag Vorrichtung zur elektronischen Steuerung eines Automatgetriebes für ein Kraftfahrzeug
DE102008026218B4 (de) * 2008-05-30 2012-04-19 Geräte- und Pumpenbau GmbH Dr. Eugen Schmidt Regelbare Kühlmittelpumpe
CN202117755U (zh) * 2011-06-15 2012-01-18 中国汽车技术研究中心 不受发动机转速影响的发动机电控辅助冷却系统
US9416720B2 (en) * 2011-12-01 2016-08-16 Paccar Inc Systems and methods for controlling a variable speed water pump
US9869232B2 (en) * 2012-06-27 2018-01-16 Ford Global Technologies, Llc Variable-speed pump control for engine coolant system with variable restriction
JP5857899B2 (ja) * 2012-07-13 2016-02-10 株式会社デンソー 車載内燃機関の冷却システム
CN203161338U (zh) * 2013-04-17 2013-08-28 上海鲁交测控科技有限公司 一种宽范围发动机水循环模拟温控系统

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010054395A1 (en) * 2000-02-16 2001-12-27 Wilo Gmbh Controller for pump and valve
US20090041588A1 (en) * 2007-08-08 2009-02-12 Halliburton Energy Services, Inc. Active valve system for positive displacement pump
US20120204818A1 (en) * 2011-02-15 2012-08-16 Schwabische Huttenwerke Automotive Gmbh Coolant pump which exhibits an adjustable delivery volume
DE102013011209B3 (de) * 2013-07-04 2014-01-23 Geräte- und Pumpenbau GmbH Dr. Eugen Schmidt Regelbare Kühlmittelpumpe
US10400659B2 (en) * 2014-07-21 2019-09-03 Nidec Gpm Gmbh Coolant pump with integrated closed-loop control

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11181112B2 (en) 2015-11-06 2021-11-23 Pierburg Gmbh Control arrangement for a mechanically controllable coolant pump of an internal combustion engine
US11002281B2 (en) 2017-09-01 2021-05-11 Nidec Gpm Gmbh Controllable coolant pump for a main delivery circuit and a secondary delivery circuit
USD923060S1 (en) * 2018-08-09 2021-06-22 Psg Germany Gmbh Pump
USD941884S1 (en) 2018-08-09 2022-01-25 Psg Germany Gmbh Pump
USD950609S1 (en) * 2018-08-09 2022-05-03 Psg Germany Gmbh Pump
USD952000S1 (en) * 2018-08-09 2022-05-17 Psg Germany Gmbh Engine part
USD968472S1 (en) 2018-08-09 2022-11-01 Psg Germany Gmbh Pump
US20220099016A1 (en) * 2019-01-15 2022-03-31 Pierburg Pump Technology Gmbh Switchable mechanical motor vehicle coolant pump
US11028763B2 (en) * 2019-09-19 2021-06-08 Toyota Jidosha Kabushiki Kaisha Engine cooling device
USD966342S1 (en) * 2020-02-07 2022-10-11 Pedrollo S.P.A. Electric pump
USD960203S1 (en) * 2020-09-28 2022-08-09 Hugo Vogelsang Maschinenbau Gmbh Pump for liquids

Also Published As

Publication number Publication date
CN106536888A (zh) 2017-03-22
KR101912801B1 (ko) 2018-10-29
DE102014110231B3 (de) 2015-09-10
EP3172446A1 (de) 2017-05-31
EP3172446B1 (de) 2019-11-06
CN106536888B (zh) 2019-10-18
WO2016012378A1 (de) 2016-01-28
KR20170018025A (ko) 2017-02-15

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