US20130129475A1 - Method for operating a pump - Google Patents

Method for operating a pump Download PDF

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Publication number
US20130129475A1
US20130129475A1 US13/668,800 US201213668800A US2013129475A1 US 20130129475 A1 US20130129475 A1 US 20130129475A1 US 201213668800 A US201213668800 A US 201213668800A US 2013129475 A1 US2013129475 A1 US 2013129475A1
Authority
US
United States
Prior art keywords
pump
motor vehicle
pressure
trailing
medium
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.)
Abandoned
Application number
US13/668,800
Other languages
English (en)
Inventor
Klaus Ries-Mueller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Assigned to ROBERT BOSCH GMBH reassignment ROBERT BOSCH GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: REIS-MUELLER, KLAUS
Publication of US20130129475A1 publication Critical patent/US20130129475A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • 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
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/05—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by internal-combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
    • B60T13/46—Vacuum systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/02—Arrangements of pumps or compressors, or control devices therefor
    • 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
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/002—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for driven by internal combustion engines
    • 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
    • F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
    • F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
    • F04B37/14—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use to obtain high vacuum
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/08—Regulating by delivery pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/12—Introducing corrections for particular operating conditions for deceleration

Definitions

  • the present invention relates to a method for operating a pump, and to a control unit.
  • a vacuum pump is used to provide sufficient negative pressure.
  • This negative pressure typically is used for a brake booster or to control another component assembly, e.g., for a bypass valve or boost-control valve of a turbocharger.
  • the vacuum pump normally is driven continuously, via the camshaft. Since driving the vacuum pump consumes additional fuel, the use of switchable vacuum pumps is increasing. In such a case the vacuum pump is connected only if a drop occurs in the negative pressure in the brake booster, for instance because the brake has been operated. This need-based control lowers the losses caused by the vacuum pump.
  • the exemplary embodiments and/or exemplary methods of the present invention provide for realizing the control of a switchable pump in a motor vehicle, e.g., a switchable vacuum pump, the switchable pump predominantly being activated automatically in trailing-throttle operation with a switched-off engine, and switched on and/or activated in this manner. If the motor vehicle is operated under a load when the engine of the motor vehicle is on, the pump need not be activated.
  • a switchable pump in a motor vehicle e.g., a switchable vacuum pump
  • the switchable pump predominantly being activated automatically in trailing-throttle operation with a switched-off engine, and switched on and/or activated in this manner. If the motor vehicle is operated under a load when the engine of the motor vehicle is on, the pump need not be activated.
  • the motor vehicle If the motor vehicle is operated under a load, its wheels are driven by the running engine when the clutch is closed.
  • an engine implemented as internal combustion engine is combusting fuel.
  • trailing throttle operation it is provided that the engine is switched off and driven via the running wheels and/or via the moving vehicle, and thus is pushed and/or towed while the clutch is closed.
  • trailing throttle operation no fuel is combusted by an engine implemented as internal combustion engine.
  • the switchable pump in most cases a vacuum pump, is actuated, and thus controlled and/or regulated, by a control unit of an engine management, for instance.
  • the control unit may switch the pump as a function of an operating state of the motor vehicle, the pump being switched on automatically by the control unit when the motor vehicle is in trailing throttle operation and/or as soon as the motor vehicle transitions to trailing throttle operation.
  • the control unit switches the pump off again, or even refrains from switching it on in the first place, when the motor vehicle is operating under a load.
  • the control unit is able to check whether the motor vehicle is in trailing throttle operation or in load operation, by monitoring a function of other components of the motor vehicle, e.g., the engine, the transmission and/or the wheels. In addition, the control unit is able to ascertain whether the motor vehicle changes from load operation to trailing throttle operation or from trailing throttle operation to load operation, and thus changes its operating state.
  • the pump implemented as vacuum pump, for instance, is automatically activated, such as switched on.
  • the power used to drive the pump may be obtained by utilizing the brake energy and/or the inertia weight of the motor vehicle. As a result, no additional fuel is consumed to drive the pump since the engine of the motor vehicle is switched off in trailing throttle operation and the motor vehicle is decelerated as a rule.
  • a pressure therefore is able to be provided, usually built up or dissipated, in a pressure reservoir of a medium, until the pressure of the medium has reached a predefined setpoint pressure. Oil or some other fluid, for example, may be used as medium. If the pump is developed as vacuum pump, the pressure reservoir is recharged with negative pressure as setpoint pressure during trailing throttle operation.
  • the pressure reservoir furthermore is able to cooperate with a brake booster.
  • the medium for operating the brake booster may feature the predefined setpoint pressure, such as vacuum pressure.
  • a brake system of the motor vehicle is able to be actuated multiple times.
  • trailing throttle operation arises before the brake system is actuated, so that sufficient setpoint pressure, normally sufficient vacuum pressure, is made available during trailing throttle operation. This prevents the vacuum pump from using drive torque of the engine when the engine is switched on; in other words, the vacuum pump is able to be switched off when the engine is on.
  • the pump is able to be deactivated in trailing-throttle operation as well after a settable time and/or after a set time interval has elapsed, provided it is ensured that the pressure reservoir of the brake booster is fully charged following this time interval.
  • the pump is able to be switched off when the medium has reached the setpoint pressure to be attained, e.g., vacuum pressure.
  • At least one further pressure reservoir may be provided in addition, which then is likewise charged by the pump in trailing throttle operation while providing the setpoint pressure.
  • additional consumers e.g., additional vacuum pressure consumers, are able to be supplied.
  • control unit according to the exemplary embodiments and/or exemplary methods of the present invention is configured to execute all of the steps of the method provided. Furthermore, functions of the control unit are implementable as steps of the method. In addition, it is possible to realize the steps of the method as functions of the control unit.
  • FIG. 1 schematically shows a system which includes a specific development of a control unit according to the present invention.
  • System 1 schematically shown in FIG. 1 is situated in a motor vehicle (not shown further).
  • This system 1 includes a specific development of a control unit 3 according to the present invention, and a switchable pump 5 which is developed as vacuum pump in this instance.
  • system 1 includes an engine 7 of the motor vehicle implemented as combustion engine, and a camshaft 9 which is assigned to engine 7 . If pump 5 is switched on, it is provided that pump 5 is coupled to engine 7 via camshaft 9 , and thus is driven by engine 7 via camshaft 9 .
  • switchable pump 5 is connected to a pressure reservoir 11 for a medium. It is provided that pump 5 cooperates with pressure reservoir 11 . If pump 5 is switched on and thus driven by engine 7 , it is possible that operating pump 5 generates a setpoint pressure for the medium inside pressure reservoir 11 .
  • pressure reservoir 11 cooperates with a component assembly 13 of the motor vehicle, which normally is able to be operated when the medium inside pressure reservoir 11 features the setpoint pressure as a minimum.
  • component assembly 13 is developed as a component of a brake system for the motor vehicle, such as as a brake booster of the brake system.
  • component assembly 13 developed as brake booster generally is able to be operated when a vacuum pressure as the setpoint pressure is present inside pressure reservoir 11 .
  • Control unit 3 is developed to control an operation of switchable pump 5 which is situated inside the motor vehicle and developed to provide the setpoint pressure for the medium. Control unit 3 activates or switches on pump 5 when the motor vehicle is in a trailing-throttle state.
  • Pump 5 is activated automatically in the process and thus switched on when the motor vehicle is in a trailing-throttle state and/or when the motor vehicle transitions to a trailing-throttle state. In other words, pump 5 is used to set the setpoint pressure for the medium inside pressure reservoir 11 . If pump 5 is developed as vacuum pump, a vacuum pressure is generated as setpoint pressure for the medium, which vacuum pressure is used to operate a brake booster as component assembly 13 of the motor vehicle.
  • pump 5 is driven by engine 7 of the motor vehicle even in the switched-on state.
  • the already activated pump 5 is deactived in the trailing-throttle state and thus switched off if the pressure of the medium has reached the setpoint pressure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
US13/668,800 2011-11-04 2012-11-05 Method for operating a pump Abandoned US20130129475A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011085759.1 2011-11-04
DE102011085759A DE102011085759A1 (de) 2011-11-04 2011-11-04 Verfahren zum Betreiben einer Pumpe

Publications (1)

Publication Number Publication Date
US20130129475A1 true US20130129475A1 (en) 2013-05-23

Family

ID=48128803

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/668,800 Abandoned US20130129475A1 (en) 2011-11-04 2012-11-05 Method for operating a pump

Country Status (3)

Country Link
US (1) US20130129475A1 (de)
CN (1) CN103085812A (de)
DE (1) DE102011085759A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140246002A1 (en) * 2013-03-01 2014-09-04 GM Global Technology Operations LLC Positive crankcase ventilation system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6206455B2 (ja) 2015-07-08 2017-10-04 トヨタ自動車株式会社 車両の制御装置
DE102016212104B4 (de) * 2016-07-04 2018-10-31 Magna Powertrain Bad Homburg GmbH Verfahren zur Steuerung einer Vakuumpumpe

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6735942B2 (en) * 2000-08-10 2004-05-18 Robert Bosch Gmbh Method, computer program, and control unit for operating a vacuum reservoir provided in an internal combustion engine
US20100114448A1 (en) * 2008-10-31 2010-05-06 Gabor Daniel A Reduced energy vacuum pump control
US20110015037A1 (en) * 2009-07-16 2011-01-20 Gm Global Technology Operations, Inc. Coasting control systems and methods for automatic transmission
US20110129367A1 (en) * 2009-12-02 2011-06-02 Hyundai Motor Company Motorized vacuum pump
US20120051942A1 (en) * 2010-08-24 2012-03-01 Ford Global Technologies, Llc Method and device for controlling a vacuum apparatus
US8267072B2 (en) * 2010-11-02 2012-09-18 Ford Global Technologies, Llc Efficient vacuum for a vehicle
US20120312122A1 (en) * 2011-06-10 2012-12-13 GM Global Technology Operations LLC Hybrid powertrain with operator selectable electric propulsion mode
US8468879B2 (en) * 2011-06-16 2013-06-25 Ford Global Technologies, Llc Method and system for diagnosing a vacuum system
US8688340B2 (en) * 2010-12-01 2014-04-01 Hyundai Motor Company Apparatus and method for supplementing brake vacuum pressure
US8784267B2 (en) * 2009-11-03 2014-07-22 Zf Friedrichshafen Ag Method for controlling a rolling or coasting function of a vehicle

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004019511A1 (de) * 2004-04-22 2005-11-10 Zf Friedrichshafen Ag Verfahren zur Steuerung einer Druckmittelpumpe in einem Kraftfahrzeug

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6735942B2 (en) * 2000-08-10 2004-05-18 Robert Bosch Gmbh Method, computer program, and control unit for operating a vacuum reservoir provided in an internal combustion engine
US20100114448A1 (en) * 2008-10-31 2010-05-06 Gabor Daniel A Reduced energy vacuum pump control
US20110015037A1 (en) * 2009-07-16 2011-01-20 Gm Global Technology Operations, Inc. Coasting control systems and methods for automatic transmission
US8784267B2 (en) * 2009-11-03 2014-07-22 Zf Friedrichshafen Ag Method for controlling a rolling or coasting function of a vehicle
US20110129367A1 (en) * 2009-12-02 2011-06-02 Hyundai Motor Company Motorized vacuum pump
US20120051942A1 (en) * 2010-08-24 2012-03-01 Ford Global Technologies, Llc Method and device for controlling a vacuum apparatus
US8267072B2 (en) * 2010-11-02 2012-09-18 Ford Global Technologies, Llc Efficient vacuum for a vehicle
US8688340B2 (en) * 2010-12-01 2014-04-01 Hyundai Motor Company Apparatus and method for supplementing brake vacuum pressure
US20120312122A1 (en) * 2011-06-10 2012-12-13 GM Global Technology Operations LLC Hybrid powertrain with operator selectable electric propulsion mode
US8468879B2 (en) * 2011-06-16 2013-06-25 Ford Global Technologies, Llc Method and system for diagnosing a vacuum system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140246002A1 (en) * 2013-03-01 2014-09-04 GM Global Technology Operations LLC Positive crankcase ventilation system
US8955500B2 (en) * 2013-03-01 2015-02-17 GM Global Technology Operations LLC Positive crankcase ventilation system

Also Published As

Publication number Publication date
DE102011085759A1 (de) 2013-05-08
CN103085812A (zh) 2013-05-08

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ROBERT BOSCH GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:REIS-MUELLER, KLAUS;REEL/FRAME:029715/0726

Effective date: 20121115

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION