GB2472812A - Method of operating an oil supply using an estimated future oil pressure - Google Patents

Method of operating an oil supply using an estimated future oil pressure Download PDF

Info

Publication number
GB2472812A
GB2472812A GB0914479A GB0914479A GB2472812A GB 2472812 A GB2472812 A GB 2472812A GB 0914479 A GB0914479 A GB 0914479A GB 0914479 A GB0914479 A GB 0914479A GB 2472812 A GB2472812 A GB 2472812A
Authority
GB
United Kingdom
Prior art keywords
oil
stop
motor vehicle
oil supply
oil pressure
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Withdrawn
Application number
GB0914479A
Other versions
GB0914479D0 (en
Inventor
Mattias Hansson
Par Freudenthaler
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.)
GM Global Technology Operations LLC
Original Assignee
GM Global Technology Operations LLC
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 GM Global Technology Operations LLC filed Critical GM Global Technology Operations LLC
Priority to GB0914479A priority Critical patent/GB2472812A/en
Publication of GB0914479D0 publication Critical patent/GB0914479D0/en
Priority to RU2010134534/06A priority patent/RU2010134534A/en
Priority to US12/859,192 priority patent/US20110046847A1/en
Priority to CN2010102607491A priority patent/CN101992772A/en
Publication of GB2472812A publication Critical patent/GB2472812A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M5/02—Conditioning lubricant for aiding engine starting, e.g. heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18—Propelling the vehicle
    • B60W30/18009—Propelling the vehicle related to particular drive situations
    • B60W30/18018—Start-stop drive, e.g. in a traffic jam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
    • B60W50/0097—Predicting future conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M7/00—Lubrication means specially adapted for machine or engine running-in
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/0021—Generation or control of line pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/30—Conjoint control of vehicle sub-units of different type or different function including control of auxiliary equipment, e.g. air-conditioning compressors or oil pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/10—Change speed gearings
    • B60W2510/1075—Change speed gearings fluid pressure, e.g. oil pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2520/00—Input parameters relating to overall vehicle dynamics
    • B60W2520/10—Longitudinal speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2520/00—Input parameters relating to overall vehicle dynamics
    • B60W2520/10—Longitudinal speed
    • B60W2520/105—Longitudinal acceleration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18—Propelling the vehicle
    • B60W30/18009—Propelling the vehicle related to particular drive situations
    • B60W30/18109—Braking
    • B60W30/18127—Regenerative braking
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/0021—Generation or control of line pressure
    • F16H2061/0034—Accumulators for fluid pressure supply; Control thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H2312/00—Driving activities
    • F16H2312/14—Going to, or coming from standby operation, e.g. for engine start-stop operation at traffic lights

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Automation & Control Theory (AREA)
  • Human Computer Interaction (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Control Of Transmission Device (AREA)

Abstract

A method for operating an oil supply for a combustion engine and/or a transmission system of a motor vehicle with start/stop-automatic comprises detected a deceleration of the vehicle and monitoring at least one status parameter which correlates with a manner of the deceleration. The method estimates a future oil pressure of the oil supply based on the status parameter and an actual oil supply control strategy and if the estimated future oil pressure is below a predetermine threshold of the oil pressure, an oil pump is activated which fills an accumulator tank. Also claimed is controller for carrying out the method and an oil supply system which is operated by the controller using the method. The accumulator tank is filled in advance of a possible automatic stop so that there is a sufficient high oil pressure when the combustion engine is started again and a period of time for the automatic stop is not lengthened. This leads to a reduction of the fuel consumption and the CO2 emissions.

Description

Method for operating an oil supply and controller Des cription The invention relates to a method for-operating an oil supply for a combustion engine and/or a transmission system of a motor vehicle as well as a corresponding controller, by means of which the oil pressure of the oil supply system can be controlled.
From DE 100 41 789 Al it is known to override the command for an automatic stop of a combustion engine with start/stop-automatic at low oil pressure, so that an oil pump can fill an accumulator tank first before the combustion engine is stopped due to the present automatic stop command. Due to the override a sufficient oil pressure can be provided, when the combustion engine starts.
It is a disadvantage of such kind of a method that the fuel consumption and the C02-emissions of the combustion engine are high.
It is the object of the invention to provide a method for operating an oil supply as well as a controller, by means of which the fuel consumption and the C02-ernisstons of the combustion engine can be reduced without dealing with a too low oil pressure at the start of the combustion engine.
The solution of the object is achieved by a method with the features of claim 1 as well as a controller with the features of claim 1. Preferred embodiments are given by the dependent claims.
The method according to the invention for operating an oil supply for a combustion engine and/or a transmission system of a motor vehicle particularly with start/stop-automatic comprises the steps, that a deceleration of the motor vehicle is detected, at least one status parameter, which correlates with the manner of the deceleration, is monitored, a future oil pressure of the oil supply is estimated based on the status parameter and the actual oil supply control strategy, and if the estimated future oil pressure is below a predetermined threshold of the oil pressure an oil pump for filling an accumulator tank of the oil supply is activated.
The method according to the invention provides the possibility to fill the accumulator tank not only when an automatic stop of the combustion engine is initiated by the start/stop-automatic but even before all conditions for initiating the automatic stop are met. The future oil pressure is particularly calculated for a point in time, when the automatic stop of the combustion engine due to the start/stop-automatic is scheduled based on the development and/or the actual value of the status parameter(s) . For that purpose the development of the status parameter(s) can be extrapolated. Due to the correlation of the status parameter(s) to the manner of the deceleration, at least a rough estimation of the development of the speed of the motor vehicle and thus the deceleration or vice versa can be calculated. For that purpose even rather qualitative parameters are sufficient, wherein specific measured values of different parameters are preferred. Since the accumulator tank is filled in advance of a possible automatic stop a sufficient high oil pressure, when the combustion engine is started again, is safeguarded, wherein the period of time for accomplishing the automatic stop is not lengthened. The period of time until the automatic stop is initiated after a stop of the motor vehicle can even be shortened. This leads to a reduction, of the fuel consumption and the C02-ernissions of the combustion engine without dealing with a too low oil pressure at the start of the combustion engine.
This result is realized by turning away from the actual oil supply control strategy for a short period of time for filling the accumulator tank in addition to the actual oil supply control strategy. The decision to change the actual oil supply control strategy can be based on a very low number of monitored values like amount of the deceleration and/or amount of the vehicle speed, this means the speed of the motor vehicle, without significant problems. Further it is used the insight that the automatic stop will only occur after a deceleration and not after an acceleration of the motor vehicle. Thus, it is possible to trigger the start of the method according to the invention, when specific conditions particularly with respect to the amount of the deceleration and/or the vehicle speed are met. For instance the method according to the invention is initiated when the speed of the motor vehicle is below a particularly amount, like 20 km/h and the amount of deceleration is above zero, that means a negative acceleration of the motor vehicle is present.
Particularly the status parameters can be provided via a CAN-bus, so that additional sensors are not necessary. In the case that a stop of the combustion engine did not occur as estimated no drawbacks are present. The regular standard oil supply control strategy can deal with the filled accumulator tank without problems.
The predetermined threshold of the oil pressure is particularly chosen such that, when the combustion engine starts, an operation of the oil pump is not necessary for a particular period of time. Particularly the accumulator tank is filled for providing an oil pressure significantly above the threshold for providing a safety reserve and/or considering an increasing deceleration over the period of time until the stop of the motor vehicle as calculated prior. The required oil pressure for this period of time can be provided by the level of oil in the accumulator tank only. For starting the combustion engine an automotive battery does not have to provide electric energy to the oil pump during the engine crank event. The respective electric energy is saved for starting the combustion engine. After the start of the combustion engine the necessary electric energy can be provided by an electric generator driven by the combustion engine. The charge of the automotive battery can be saved. The method according to the invention can be applied to conventional pure combustion engine motor vehicles, when the automatic stop of the start/stop-automatic is used for stopping the combustion engine automatically at a stop of the motor vehicle with zero vehicle speed. The method according to the invention can be further applied to a hybrid motor vehicle, when the automatic stop of the start/stop-automatic is used for changing from combustion engine mode to electric machine mode.
Particularly the status parameter is the amount of the deceleration, the speed of the motor vehicle or the brake status, whether the brakes are applied. Preferably more than one status parameter is used. For instance the brake status may be a signal for starting the method according to invention and/or the combination of the amount of the vehicle speed and the amount of the deceleration may be used for calculating a point of time in the future, when the motor vehicle may stop.
In a preferred embodiment based on the development and/or the actual value of the at least one status parameter, particularly speed of the motor vehicle and amount of the deceleration, a stop-time is calculated, until which the speed of the motor vehicle will be zero and/or an automatic stop of the combustion engine due to the start/stop-automatic will occur, and the future oil pressure is calculated for the end of the stop-time. The stop-time t0 can be calculated by the ratio of the amount of the actual vehicle speed v and the amount of the actual deceleration a (t50 = v/a), wherein the actual deceleration can be determined by the development of the vehicle speed (a = v, with = dv/dt) Particularly an additional period of time is added for safety. The additional period can be a percentage p of the calculated stop-time by means of the ratio v/a, wherein 1% �= p �= 25%, particularly 2% �= p �= 20%, preferably 3% �= p �= 15% and most preferred 5% �= p �= 10% can be given. In the case that the start/stop-automatic provides a minimum delay until the automatic stop is initiated after the stop of the motor vehicle, this delay is usually a sufficient safety time, so that the stop-time can be calculated with respect to the calculated point of time, when the motor vehicle stops without an additional period of time for safety purposes. In the case that the intended delay of the start/stop-automatic is long compared to the maximum filling time of the accumulator tank, the stop-time can be calculated with respect to the calculated point of time, when the automatic stop of the combustion engine due to the start/stop-automatic will occur. In this case it is preferred to consider an additional period of time for determining the stop-time for being on the safe side with respect to the intended minimum oil pressure of the oil S supply system.
Preferably the oil pump is activated, if the automatic stop of the start/stop-automatic is unblocked, wherein the automatic stop is particularly blocked, when the charge of an automotive battery is below a predetermined value, a temperature and/or other value of a vehicle component is out of a predetermined range and/or a combustion engine control is on override mode from a subsystem particularly from transmission control or air conditioning control. It is considered that under certain circumstances the automatic stop of the start/stop-automatic is prohibited. In this case it is not necessary to fill the accumulator tank in addition to the usual standard oil supply control strategy. The additional filling of the accumulator tank according to the method according to the invention is prevented, while an automatic stop is blocked. The filling and the emptying of the accumulator tank occurs in line of only the usual standard oil supply control strategy. If so, a higher minimum oil pressure and/or a higher minimum level of the accumulator tank can be controlled, so that the predetermined threshold of the oil pressure is already present or reached quickly, when the blocking of the automatic stop is unblocked, while the motor vehicle stands still with zero vehicle speed.
Particularly the predetermined threshold is determined on the basis of the ratio of the fill volume V of the accumulator tank to the maximum fill volume Vmax of the accumulator tank, wherein 0.75 �= V/VmaX �= 0.99, particularly 0.85 �= V/VIUaX �= 0.95, preferably V/Vmax = 0.90 � 0.02 is given. It is considered that the oil pressure depends mainly on the hydrostatic pressure inside the accumulator tank. Controlling the oil pressure can be performed by controlling the level of oil inside the accumulator tank.
Preferably the oil pump is electrically operable and adapted to be fed by electrical energy, from a generator for providing a braking force to the motor vehicle. When a driver applies the brakes, the braking energy of the motor vehicle can be used for operating the oil pump.
Instead of wasting the braking energy, the braking energy can be converted via the generator, which at least partially supports the braking process, into electric energy for operating the oil pump and/or charging the automotive battery. It is not necessary to use a part of the power provided by the combustion engine and/or to use the automotive battery for pumping oil by means of the oil pump.
The invention further relates to a controller for carrying out the method as previously described, wherein the controller comprises at least one sensor for detecting a deceleration of the motor vehicle and/or at least one status parameter, which correlates with the manner of the deceleration, a data input for connection to an oil supply controller, a calculation unit for estimating a future oil pressure of the oil supply based on the status parameter and the actual oil supply control strategy, and an activator output connected to an oil pump for filling an accumulator tank of the oil supply, if the estimated future oil pressure is below a predetermined threshold of the oil pressure. The oil supply controller can provide the usual standard oil supply control strategy for the oil supply system. Due to the data input internal variables of the oil supply controller can be used by the controller according to the invention. The sensor for detecting a deceleration can use the vehicle speed as status parameter so that for instance two measured vehicle speed at two different points of time can be compared for detecting, whether a deceleration is present. The activator output can be a switch for turning on or off the oil pump. The activator output is particularly in parallel to the oil supply controller connected to the oil pump, so that the activation of the oil pump based on the control of the oil supply controller and based on the control of the -: controller according to the invention can be superposed.
Since the accumulator tank is filled in advance of a possible automatic stop a sufficient high oil pressure, when the combustion engine is started again, is safeguarded, wherein the period of time for accomplishing the automatic stop is not lengthened. The period of time until the automatic stop is initiated after a stop of the motor vehicle can even be shortened. This leads to a reduction of the fuel consumption and the C02-emissions of the combustion engine without dealing with a too low oil pressure at the start of the combustion engine.
The invention further relates to an oil supply system for a combustion engine and/or a transmission system of a motor vehicle particularly with start/stop-automatic, wherein the oil supply system comprises an oil circuit for providing oil to the combustion engine, an oil pump for pumping oil through the oil circuit, an accumulator tank for storing oil and providing an oil pressure, wherein the accumulator tank is connected to the oil pump for filling the accumulator tank, and a controller, which can be designed as previously described, connected to the oil pump for carrying out the method as previously described. Since the accumulator tank is filled in advance of a possible automatic stop a sufficient high oil pressure, when the combustion engine is started again, is safeguarded, wherein the period of time for accomplishing the automatic stop is not lengthened. The period of time until the automatic stop is initiated after a stop of the motor vehicle can even be shortened. This leads to a reduction of the fuel consumption and the C02-emissions of the combustion engine without dealing with a too low oil pressure at the start of the combustion engine.
These and other aspects of the invention will be apparent from and elucidated with reference to a preferred embodiment described hereinafter.
In the drawings: Fig. 1 is a schematic diagram showing a vehicle speed over the time.
As illustrated in Fig. 1 a motor vehicle may comprise a vehicle speed Vi and can be decelerated at a time t1. Under the assumption of a constant deceleration the vehicle speed decreases until at a time t3 a vehicle speed of v0 = 0 km/h is reached. Usually it takes a period of time at zero vehicle speed v0 until a start/stop-automatic of the motor vehicle initiates an automatic stop of a combustion engine of the motor vehicle at a time t4.
From time ti on the method according to the invention monitors whether a minimum oil pressure for an oil supply system will be provided at the time t4. When for example the actual time is t2 it is calculated based on the actual vehicle speed v2 and the actual amount of the deceleration a = a stop-time t50 until time t4 is reached. A delay time tdelay =t4 -t3 until the start/stop- -10 -automatic of the motor vehicle initiates an automatic stop after reaching zero vehicle speed is considered.
When the method according to the invention calculates that the remaining time is only hardly sufficient for reaching the intended minimum oil pressure, when an oil pump is operated at full power, the oil pump is activated for filling an accumulator tank, by means of which the intended oil pressure of the oil supply system can be provided. When the combustion engine. stops at time t4 a sufficient oil pressure is safeguarded for starting the combustion engine without the need of operating the oil pump at the same time.

Claims (8)

  1. -11 -Cia ims 1. Method for operating an oil supply for a combustion engine and/or a transmission system of a motor vehicle particularly with start/stop-automatic, wherein a deceleration of the motor vehicle is detected, at least one status parameter, which correlates with the manner of the deceleration, is monitored, a future oil pressure of the oil supply is estimated based on the status parameter and the actual oil supply control strategy, and if the estimated future oil pressure is below a predetermined threshold of the oil pressure, an oil pump for filling an accumulator tank of the oil supply is activated.
  2. 2. Method according to claim 1 wherein the status parameter is the amount of the deceleration, the speed of the motor vehicle or the brake status, whether the brakes are applied.
  3. 3. Method according to claim 1 or 2 wherein based on the development and/or the actual value of the at least one status parameter, particularly speed of the motor vehicle and amount of the deceleration, a stop-time (t50) is calculated, until which the speed of the motor vehicle will be zero and/or an automatic stop of the combustion engine due to the start/stop-automatic will occur, and the future oil pressure is calculated for the end of the stop-time (t50) -12 -
  4. 4. Method according to anyone of claims 1 to 3 wherein the oil pump is activated, if the automatic stop of the start/stop-automatic is unblocked, wherein the automatic stop is particularly blocked, when the charge of an automotive battery is below a predetermined value, a temperature and/or other value of a vehicle component is out of a predetermined range and/or a combustion engine control is on override mode from a subsystem particularly from transmission control or air conditioning control.
  5. 5. Method according to anyone of claims 1 to 4 wherein the predetermined threshold is determined on the basis of the ratio of the fill volume V of the accumulator tank to the maximum fill volume Vmax Of the accumulator tank, wherein 0.75 �= V/Vmax �= 0.99, particularly 0.85 �= V/Vmax �= 0.95, preferably V/Vmax = 0.90 � 0.02 is given.
  6. 6. Method according to anyone of claims 1 to 5 wherein the oil pump is electrically operable and adapted to be fed by electrical energy from a generator for providing a braking force to the motor vehicle.
  7. 7. Controller for carrying out the method according to anyone of claims 1 to 6, comprising at least one sensor for detecting a deceleration of the motor vehicle and/or at least one status parameter, which correlates with the manner of the deceleration, a data input for connection to an oil supply controller, -13 -a calculation unit for estimating a future oil pressure of the oil supply based on the status parameter and the actual oil supply control strategy, and an activator output connected to an oil pump for filling an accumulator tank of the oil supply, if the estimated future oil pressure is below a predetermined threshold of the oil pressure.
  8. 8. Oil supply system for a combustion engine and/or a transmission system of a motor vehicle particularly with start/stop-automatic, comprising an oil circuit for providing oil to the combustion engine, an oil pump for pumping oil through the oil circuit, an accumulator tank for storing oil and providing an oil pressure, wherein the accumulator tank is connected to the oil pump for filling the accumulator tank, and a controller according to claim 7 connected to the oil pump for carrying out the method according to anyone of claims 1 to 6.
GB0914479A 2009-08-19 2009-08-19 Method of operating an oil supply using an estimated future oil pressure Withdrawn GB2472812A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB0914479A GB2472812A (en) 2009-08-19 2009-08-19 Method of operating an oil supply using an estimated future oil pressure
RU2010134534/06A RU2010134534A (en) 2009-08-19 2010-08-18 METHOD AND CONTROLLER FOR CONTROL OF OIL SUPPLY
US12/859,192 US20110046847A1 (en) 2009-08-19 2010-08-18 Method for operating an oil supply and controller
CN2010102607491A CN101992772A (en) 2009-08-19 2010-08-19 Method of operating oil supply using estimated future oil pressure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0914479A GB2472812A (en) 2009-08-19 2009-08-19 Method of operating an oil supply using an estimated future oil pressure

Publications (2)

Publication Number Publication Date
GB0914479D0 GB0914479D0 (en) 2009-09-30
GB2472812A true GB2472812A (en) 2011-02-23

Family

ID=41171601

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0914479A Withdrawn GB2472812A (en) 2009-08-19 2009-08-19 Method of operating an oil supply using an estimated future oil pressure

Country Status (4)

Country Link
US (1) US20110046847A1 (en)
CN (1) CN101992772A (en)
GB (1) GB2472812A (en)
RU (1) RU2010134534A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2514876A (en) * 2013-06-04 2014-12-10 Ford Global Tech Llc An engine oil supply system and a method of controlling an engine oil supply system

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2491626B (en) * 2011-06-09 2016-05-04 Ford Global Tech Llc A system and method for monitoring engine oil pressure
US9260986B2 (en) 2012-01-31 2016-02-16 Ford Global Technologies, Llc Oil pressure scheduling based on engine acceleration
US20140379241A1 (en) * 2013-06-20 2014-12-25 GM Global Technology Operations LLC Hydraulic accumulator temperature estimation for controlling automatic engine stop/start
CN105510629A (en) * 2015-12-09 2016-04-20 南车株洲电力机车有限公司 Urban rail vehicle zero speed determination method
KR20210032152A (en) * 2019-09-16 2021-03-24 현대자동차주식회사 Method for controlling oil pump of vehicle
CN111042929B (en) * 2019-12-09 2022-06-24 中国人民解放军总参谋部第六十研究所 Method for controlling rotating speed loop of small and medium-sized turbojet engine supplied with oil by adopting oil pump
CN114294119B (en) * 2021-12-29 2023-07-14 重庆潍柴发动机有限公司 Engine control method, engine and ship

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0990793A2 (en) * 1998-09-28 2000-04-05 Toyota Jidosha Kabushiki Kaisha Stop and restart device for vehicular engine
US6401012B1 (en) * 1999-08-26 2002-06-04 Honda Giken Kogyo Kabushiki Kaisha Vehicle control apparatus
EP2131071A2 (en) * 2008-06-03 2009-12-09 Nissan Motor Co., Ltd. Iding-stop cancellation control apparatus of vehicle driving system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3867521B2 (en) * 2000-09-05 2007-01-10 トヨタ自動車株式会社 Electric oil pump control device
JP4205026B2 (en) * 2004-09-01 2009-01-07 本田技研工業株式会社 Hydraulic supply device for transmission
JP4007387B2 (en) * 2006-01-24 2007-11-14 トヨタ自動車株式会社 Vehicle control device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0990793A2 (en) * 1998-09-28 2000-04-05 Toyota Jidosha Kabushiki Kaisha Stop and restart device for vehicular engine
US6401012B1 (en) * 1999-08-26 2002-06-04 Honda Giken Kogyo Kabushiki Kaisha Vehicle control apparatus
EP2131071A2 (en) * 2008-06-03 2009-12-09 Nissan Motor Co., Ltd. Iding-stop cancellation control apparatus of vehicle driving system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2514876A (en) * 2013-06-04 2014-12-10 Ford Global Tech Llc An engine oil supply system and a method of controlling an engine oil supply system
CN104213994A (en) * 2013-06-04 2014-12-17 福特环球技术公司 Engine oil supply system and a method of controlling an engine oil supply system
GB2514876B (en) * 2013-06-04 2016-07-06 Ford Global Tech Llc An engine oil supply system and a method of controlling an engine oil supply system
US9435235B2 (en) 2013-06-04 2016-09-06 Ford Global Technologies, Llc Engine oil supply system and a method of controlling an engine oil supply system
CN104213994B (en) * 2013-06-04 2019-06-28 福特环球技术公司 Engine fuel system and the method for controlling engine fuel system

Also Published As

Publication number Publication date
CN101992772A (en) 2011-03-30
GB0914479D0 (en) 2009-09-30
RU2010134534A (en) 2012-02-27
US20110046847A1 (en) 2011-02-24

Similar Documents

Publication Publication Date Title
GB2472812A (en) Method of operating an oil supply using an estimated future oil pressure
US20210079904A1 (en) Compressed air system for a motor vehicle
US8738205B2 (en) Method and device for determining the beginning of a start phase of an internal combustion engine in a hybrid vehicle
KR100980079B1 (en) Hill hold for an electric vehicle
US9222576B2 (en) Hydraulic system charge detection
US20100198449A1 (en) Vehicular control device and method of controlling a vehicle
US9157382B2 (en) Idling stop control device, vehicle and vehicle control method
US8370041B2 (en) Reduced energy vacuum pump control
EP2860076A1 (en) Automatic braking control device
CN108365299B (en) Electric vehicle thermal management enabling control method, storage medium and electronic equipment
CN102892652B (en) Braking control system
JP5518498B2 (en) Control device for idle stop car
EP2318230B1 (en) Accelerator accelerating control device of four-wheel drive electric vehicle and method thereof
US11370405B2 (en) System, controller and method for air charging
KR101613414B1 (en) Smart Brake systems for cars Brake
JP5601524B2 (en) Control device for electric negative pressure pump
JP6277975B2 (en) Idling stop control device
JP2007223471A (en) Vehicular power supply control device
JP7330610B2 (en) vehicle controller
JP2017218024A (en) Brake mechanism, hybrid vehicle and method for controlling brake mechanism
US20140032024A1 (en) Method for operating a hybrid vehicle
CN101934791A (en) Stopping pause of starting/stopping control over vehicle
CN105346536A (en) Idling stop control device
JP6222130B2 (en) Idling stop control device
JP7166716B2 (en) vehicle controller

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)