DE4304153A1 - IC engine idling speed adjustment - uses higher idling speed for ancillary set drive at constant reduction - Google Patents

IC engine idling speed adjustment - uses higher idling speed for ancillary set drive at constant reduction

Info

Publication number
DE4304153A1
DE4304153A1 DE4304153A DE4304153A DE4304153A1 DE 4304153 A1 DE4304153 A1 DE 4304153A1 DE 4304153 A DE4304153 A DE 4304153A DE 4304153 A DE4304153 A DE 4304153A DE 4304153 A1 DE4304153 A1 DE 4304153A1
Authority
DE
Germany
Prior art keywords
idling speed
gear
idle speed
engine
machine
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Withdrawn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
DE4304153A
Other languages
German (de)
Inventor
Dieter Dipl Ing Voigt
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.)
Volkswagen AG
Original Assignee
Volkswagen AG
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 Volkswagen AG filed Critical Volkswagen AG
Priority to DE4304153A priority Critical patent/DE4304153A1/en
Publication of DE4304153A1 publication Critical patent/DE4304153A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
    • 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
    • B60W30/188—Controlling power parameters of the driveline, e.g. determining the required power
    • 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
    • F01M1/00—Pressure lubrication
    • F01M1/02—Pressure lubrication using lubricating pumps
    • 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
    • F01M1/00—Pressure lubrication
    • F01M1/18—Indicating or safety devices
    • F01M1/20—Indicating or safety devices concerning lubricant 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
    • F02D41/08—Introducing corrections for particular operating conditions for idling
    • F02D41/083—Introducing corrections for particular operating conditions for idling taking into account engine load variation, e.g. air-conditionning
    • 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
    • B60W2540/00—Input parameters relating to occupants
    • B60W2540/16—Ratio selector position
    • 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
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/06—Combustion engines, Gas turbines
    • B60W2710/0644—Engine speed
    • B60W2710/065—Idle condition
    • 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
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/10—Indicating devices; Other safety devices
    • 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
    • F16N—LUBRICATING
    • F16N2250/00—Measuring
    • F16N2250/04—Pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Transmission Device (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)

Abstract

The engine has a gear box with a neutral gear and several travelling gears. A higher or lower idling speed is adjusted dependent upon the gear in use. The higher idling speed is selected for the purpose of perfect operation of auxiliary sets driven by the engine. The lower idling speed is selected only, when a starting gear or reversing gear is used, as long as an auxiliary set, required for operation of the engine, and driven by it at constant reduction is working sufficiently. The auxiliary set may be an oil pump in the lubrication circuit, and the purpose may be to monitor an oil pressure or temp. USE/ADVANTAGE - For stop-go engine operation,with min.fuel requirement and reliable operation.

Description

Die Erfindung betrifft ein Verfahren gemäß dem Oberbegriff des Patentanspruchs 1. Ein derartiges Verfahren ist speziell für eine auf ein automatisches Getriebe mit Drehmomentwandler arbeitende Brennkraftmaschine aus der EP 00 84 825 A2, F02M 3/06, in der Weise bekannt, daß bei in P- oder N-Stellung befindlichem Getriebewähl­ hebel die niedrigere Leerlaufdrehzahl, dagegen bei in einer Fahr­ stellung befindlichem Getriebewählhebel die höhere Leerlaufdrehzahl eingestellt wird. Diese Maßnahme dient der Verhinderung von Pro­ blemen, die an die Existenz eines automatischen Getriebes mit Drehmomentwandler gekoppelt sind.The invention relates to a method according to the preamble of Claim 1. Such a method is especially for one working on an automatic transmission with torque converter Internal combustion engine from EP 00 84 825 A2, F02M 3/06, in the manner Known that when the gearbox is in the P or N position lever the lower idle speed, however, in one drive position gear selector lever the higher idle speed is set. This measure serves to prevent pro blemen with the existence of an automatic transmission Torque converter are coupled.

Die Erfindung, die auch nicht ein automatisches Getriebe mit Dreh­ momentwandler voraussetzt, befaßt sich demgegenüber mit einem anderen Problem:The invention, which is also not an automatic transmission with rotation requires torque converter, on the other hand, deals with one other problem:

Bei der Verbrauchsminimierung von als Kraftfahrzeugantrieben dienenden Brennkraftmaschinen ist die Wahl der Leerlaufdrehzahl von entscheidender Bedeutung. Dabei spielt nicht nur der Leerlauf- Kraftstoffverbrauch der Maschine, sondern auch der Verbrauchsanteil von Nebenaggregaten, wie Lenkhilfspumpe, Klimakompressor, Generator und Ölpumpe, eine wichtige Rolle, da ihre Antriebsübersetzungen so gewählt werden müssen, daß auch bei der niedrigsten Maschinendreh­ zahl, also der Leerlaufdrehzahl, von ihnen gewisse Mindestleistun­ gen, insbesondere Aufrechterhaltung eines hinreichenden Schmieröl­ kreislaufs der Maschine, erbracht werden müssen.When minimizing consumption as motor vehicle drives Serving internal combustion engines is the choice of the idle speed of vitally important. Not only does the idle The machine's fuel consumption, but also the proportion of consumption of auxiliary units such as power steering pump, air conditioning compressor, generator and oil pump, play an important role because their drive ratios are so must be chosen that even at the lowest machine rotation number, i.e. the idle speed, certain minimum power from them conditions, in particular maintaining sufficient lubricating oil  circuit of the machine.

Wählt man eine niedrige Leerlaufdrehzahl, so müssen, wenn man die Nebenaggregate nicht relativ groß auslegen will, diese von der Maschine mit entsprechend hohen Übersetzungen angetrieben werden. Dies wiederum bedeutet, daß beim Betrieb der Maschine mit hohen Drehzahlen unerwünschte Nebenaggregate-Verlustleistungen entstehen, wodurch wiederum sowohl die verfügbare Maschinenleistung als auch der Kraftstoffverbrauch negativ beeinflußt werden.If you choose a low idling speed, then if you have the Auxiliary units do not want to lay out relatively large, this from the Machine with correspondingly high gear ratios. This in turn means that when operating the machine with high Speeds undesirable auxiliary unit power losses occur, which in turn both the available machine power and fuel consumption can be adversely affected.

Als Maßnahme zur Reduzierung der Nebenaggregate-Verluste in höheren Drehzahlbereichen der Brennkraftmaschine sind Einrichtungen zur drehzahlabhängigen Veränderung der Antriebsübersetzungen der Neben­ aggregate bekannt; die Nachteile dieser Lösungen - erhöhte Kosten, zusätzlicher Bauraumbedarf - haben bisher einen Serieneinsatz ver­ hindert.As a measure to reduce auxiliary unit losses in higher Speed ranges of the internal combustion engine are devices for speed-dependent change in the drive ratios of the subsidiary known aggregates; the disadvantages of these solutions - increased costs, additional space requirements - have so far been used in series production prevents.

Daher kann eine wirksame und kostengünstige Maßnahme zur Reduzie­ rung des Kraftstoffverbrauchs unter bestimmten Voraussetzungen die Einstellung einer relativ hohen Leerlaufdrehzahl sein, da der da­ durch erhöhte Leerlaufkraftstoffverbrauch durch die Reduktion der Nebenaggregate-Verluste infolge der Anpassung ihrer Antriebsüber­ setzungen an die hohe Leerlaufdrehzahl sogar überkompensiert wird.Therefore, an effective and inexpensive measure to reduce fuel consumption under certain conditions Setting a relatively high idle speed, because of that through increased idle fuel consumption by reducing the Auxiliary unit losses due to the adaptation of their drives even overcompensating for the high idling speed.

Diese generelle Erhöhung der Leerlaufdrehzahl über einen für den stabilen Betrieb der Maschine an sich ausreichenden Drehzahlwert hinaus macht aber bestimmte Betriebsweisen des mit der Maschine ausgerüsteten Fahrzeugs schwierig, beispielsweise Stop- and Go-Ver­ kehr oder Rangierbetrieb.This general increase in idle speed over one for the stable operation of the machine in itself sufficient speed value but also does certain modes of operation with the machine equipped vehicle difficult, for example stop and go ver sweeping or shunting.

Der Erfindung liegt die Aufgabe zugrunde, ein gattungsgemäßes Ver­ fahren so auszugestalten, daß einerseits unter Berücksichtigung der Bedürfnisse der von der Maschine angetriebenen Nebenaggregate mit minimalem Aufwand ein minimaler Kraftstoffbedarf im Leerlaufbetrieb sichergestellt ist, andererseits die Betriebsmöglichkeiten der Maschine bzw. eines mit dieser ausgerüsteten Fahrzeugs nicht nach­ teilig dadurch beeinflußt werden.The invention has for its object a generic Ver drive so that on the one hand, taking into account the Needs of the auxiliary units driven by the machine minimal effort, minimal fuel consumption when idling is ensured, on the other hand, the operating possibilities of the Machine or a vehicle equipped with it  partly influenced by it.

Die erfindungsgemäße Lösung dieser Aufgabe besteht in einem gat­ tungsgemäßen Verfahren mit den kennzeichnenden Merkmalen des Haupt­ anspruchs, vorteilhafte Ausbildungen der Erfindung beschreiben die Unteransprüche.The solution to this problem according to the invention consists in a gat Proper method with the characteristic features of the main demanding, advantageous embodiments of the invention describe the Subclaims.

Betrachtet man den Fall eines Handschaltgetriebes in einem Kraft­ fahrzeug, so erfolgt bei der Erfindung die Einstellung der niedri­ geren Leerlaufdrehzahl also nur bei eingelegtem ersten Gang und bei eingelegtem Rückwärtsgang, damit bei geschlossener Hauptkupplung minimale Fahrgeschwindigkeiten, wie sie im Stop- and Go-Verkehr und im Rangierbetrieb erforderlich sind, möglich sind. Insbesondere bei längerem Andauern dieser beiden Betriebsweisen ist es wichtig, sicherzustellen, daß insbesondere die Schmierölversorgung der Brennkraftmaschine in ausreichendem Maße erhalten bleibt, die durch eine von der Maschine mit konstantem Übersetzungsverhältnis ange­ triebene Ölpumpe bewirkt wird.Consider the case of a manual transmission in one force vehicle, the setting of the low takes place in the invention idle speed only when first gear is engaged and at reverse gear engaged, so with the main clutch closed minimum driving speeds, as in stop and go traffic and necessary in shunting operations are possible. Especially at It is important to keep these two modes of operation ensure that in particular the lubricating oil supply to the Internal combustion engine is maintained to a sufficient extent by one indicated by the machine with constant gear ratio driven oil pump is effected.

Ein wesentlicher Vorteil des erfindungsgemäßen Verfahren besteht darin, daß sich Einrichtungen zur drehzahlabhängigen Änderung der Antriebsübersetzungen der Nebenaggregate erübrigen.There is a significant advantage of the method according to the invention in that there are facilities for speed-dependent change of There is no need for additional drive ratios.

In den Fällen, in denen die niedrigere Leerlaufdrehzahl nicht aus­ reicht, um eine hydraulische Lenkservoeinrichtung mit ausreichendem Druck zu versorgen, kann es gemäß Anspruch 5 zweckmäßig sein, im Bedarfsfall manuell über einen Schalter oder automatisch bei Lenk­ radeinschlägen eine Umschaltung von der niedrigeren auf die höhere Leerlaufdrehzahl vorzunehmen.In cases where the lower idle speed is not off is enough to provide a hydraulic steering servo with sufficient To supply pressure, it may be appropriate according to claim 5 in If necessary, manually via a switch or automatically at Lenk wheel locks switch from the lower to the higher Idle speed.

Ein weiterer Vorteil des erfindungsgemäßen Verfahrens ist darin zu sehen, daß ihre Realisierung lediglich übliche und bewährte Bautei­ le erfordert, so daß hierauf im einzelnen nicht eingegangen zu wer­ den braucht.Another advantage of the method according to the invention is that see that their implementation is only usual and proven building le requires, so that this is not discussed in detail that needs.

Mit der Erfindung ist demgemäß ein gattungsgemäßes Verfahren geschaffen, das unter Berücksichtigung der Erfordernisse von Nebenaggregaten, die von der Maschine her angetrieben werden, Leerlaufdrehzahlen einzustellen gestattet, die einen verbrauchs­ optimalen Betrieb der Maschine zur Folge haben.Accordingly, the invention is a generic method  created that taking into account the needs of Auxiliary units that are driven by the machine Idle speeds allowed to be set that a consumption result in optimal machine operation.

Claims (5)

1. Verfahren zur Einstellung der Leerlaufdrehzahl einer Brenn­ kraftmaschine, der ein Getriebe mit zumindest einem Neutralgang und mehreren Fahrgängen nachgeschaltet ist, wobei in Abhängig­ keit von dem jeweils eingeschalteten Getriebegang eine höhere oder eine niedrigere Leerlaufdrehzahl eingestellt wird, dadurch gekennzeichnet, daß die höhere Leerlaufdrehzahl im Hinblick auf einwandfreien Betrieb von der Maschine mit konstanter Überset­ zung angetriebener Nebenaggregate gewählt und die niedrigere Leerlaufdrehzahl nur bei Einschaltung eines Anfahrgangs oder eines Rückwärtsgangs des Getriebes eingestellt wird, sofern auch dann ein für die Maschine betriebsnotwendiges, von ihr mit konstanter Übersetzung angetriebenes Nebenaggregat ausreichend arbeitet.1. A method for adjusting the idle speed of an internal combustion engine, which is followed by a transmission with at least one neutral gear and several gears, with a higher or a lower idle speed being set depending on the gear ratio engaged, characterized in that the higher idle speed in With a view to perfect operation of the machine with constant transmission driven ancillaries and the lower idle speed is only set when engaging a starting gear or a reverse gear of the transmission, provided that an ancillary unit that is operationally necessary for the machine and driven by it with constant translation works sufficiently. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Nebenaggregat eine Ölpumpe in einem Schmierölkreislauf der Maschine ist.2. The method according to claim 1, characterized in that the Auxiliary unit an oil pump in a lubricating oil circuit Machine is. 3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß ein Schmieröldruck überwacht wird.3. The method according to claim 2, characterized in that a Lube oil pressure is monitored. 4. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß eine Schmieröltemperatur überwacht wird.4. The method according to claim 2, characterized in that a Lube oil temperature is monitored. 5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekenn­ zeichnet, daß zur Aktivierung eines Lenkservos von der niedrigeren auf die höhere Leerlaufdrehzahl umgeschaltet wird.5. The method according to any one of claims 1 to 4, characterized records that to activate a steering servo from the lower to the higher idle speed is switched.
DE4304153A 1992-02-25 1993-02-12 IC engine idling speed adjustment - uses higher idling speed for ancillary set drive at constant reduction Withdrawn DE4304153A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4304153A DE4304153A1 (en) 1992-02-25 1993-02-12 IC engine idling speed adjustment - uses higher idling speed for ancillary set drive at constant reduction

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4205689 1992-02-25
DE4304153A DE4304153A1 (en) 1992-02-25 1993-02-12 IC engine idling speed adjustment - uses higher idling speed for ancillary set drive at constant reduction

Publications (1)

Publication Number Publication Date
DE4304153A1 true DE4304153A1 (en) 1993-08-26

Family

ID=25912157

Family Applications (1)

Application Number Title Priority Date Filing Date
DE4304153A Withdrawn DE4304153A1 (en) 1992-02-25 1993-02-12 IC engine idling speed adjustment - uses higher idling speed for ancillary set drive at constant reduction

Country Status (1)

Country Link
DE (1) DE4304153A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19722808A1 (en) * 1997-05-30 1998-12-03 Isad Electronic Sys Gmbh & Co Drive system, in particular for a motor vehicle, and method for operating a drive system
US6167339A (en) * 1997-05-30 2000-12-26 Continential Isad Electronic Systems Gmbh Drive system for a vehicle and method for operating a drive system
EP0937881A3 (en) * 1998-02-24 2001-04-11 Isuzu Motors Limited Electronic fuel injection apparatus for diesel engine
DE10326935A1 (en) * 2003-06-16 2005-01-20 Audi Ag Increasing power of auxiliary equipment driven by motor vehicle internal combustion engine involves direct change by changing unloaded revolution rate, indirect change to higher unloaded state speed
DE102010028286A1 (en) 2010-04-28 2011-12-01 Zf Friedrichshafen Ag Drive train operating method for motor car, involves making stable running of engine based on commands of operating modes of drive train of engine control device for decreasing and increasing engine idle rotation speed of unstressed engine
DE102011087016A1 (en) * 2011-11-24 2013-05-29 Bayerische Motoren Werke Aktiengesellschaft Device for controlling a motor vehicle drive train
WO2018160118A1 (en) * 2017-02-28 2018-09-07 Scania Cv Ab Method and computer program product for improving performance of a motor vehicle

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6167339A (en) * 1997-05-30 2000-12-26 Continential Isad Electronic Systems Gmbh Drive system for a vehicle and method for operating a drive system
DE19722808A1 (en) * 1997-05-30 1998-12-03 Isad Electronic Sys Gmbh & Co Drive system, in particular for a motor vehicle, and method for operating a drive system
EP0937881A3 (en) * 1998-02-24 2001-04-11 Isuzu Motors Limited Electronic fuel injection apparatus for diesel engine
DE10326935A1 (en) * 2003-06-16 2005-01-20 Audi Ag Increasing power of auxiliary equipment driven by motor vehicle internal combustion engine involves direct change by changing unloaded revolution rate, indirect change to higher unloaded state speed
DE10326935B4 (en) * 2003-06-16 2009-02-26 Audi Ag Method for increasing the performance of ancillaries
DE102010028286B4 (en) 2010-04-28 2021-07-15 Zf Friedrichshafen Ag Method for operating a drive train
DE102010028286A1 (en) 2010-04-28 2011-12-01 Zf Friedrichshafen Ag Drive train operating method for motor car, involves making stable running of engine based on commands of operating modes of drive train of engine control device for decreasing and increasing engine idle rotation speed of unstressed engine
DE102011087016A1 (en) * 2011-11-24 2013-05-29 Bayerische Motoren Werke Aktiengesellschaft Device for controlling a motor vehicle drive train
CN103946603B (en) * 2011-11-24 2015-12-23 宝马股份公司 For controlling the device of motor vehicle powertrain
US9302667B2 (en) 2011-11-24 2016-04-05 Bayerische Motoren Werke Aktiengesellschaft Device and method for controlling a motor vehicle drive train
CN103946603A (en) * 2011-11-24 2014-07-23 宝马股份公司 Device for controlling a motor vehicle drive train
DE102011087016B4 (en) 2011-11-24 2023-03-02 Bayerische Motoren Werke Aktiengesellschaft Device for controlling a motor vehicle drive train
WO2018160118A1 (en) * 2017-02-28 2018-09-07 Scania Cv Ab Method and computer program product for improving performance of a motor vehicle

Similar Documents

Publication Publication Date Title
DE3907633C2 (en)
DE2849125A1 (en) POWER TRANSFER SYSTEM FOR A TRACTOR
EP0034814A1 (en) Motor vehicle gearings
EP0141952B1 (en) Hydrostatic-mechanical transmission
DE3800346A1 (en) Drive arrangement for variable speeds of rotation
DE2703094A1 (en) DRIVE FOR THE AUXILIARY UNITS OF AN COMBUSTION ENGINE, ESPECIALLY IN MOTOR VEHICLES
DE4304153A1 (en) IC engine idling speed adjustment - uses higher idling speed for ancillary set drive at constant reduction
DE2625770A1 (en) Automatic gear change control - has engine speed and torque monitors delivering signals to processing circuit to set gear ratio for minimum fuel consumption
DE10060679A1 (en) Hydrostatic drive
DE60011364T2 (en) Hydrostatic vehicle steering with auxiliary pump
AT6292U1 (en) MODULAR COMBUSTION ENGINE
DE720821C (en) Braking device for drive transmissions by means of turbo converters, in particular for motor vehicles
DE3904399C2 (en)
DE2518119B2 (en) Motor vehicle driven by an internal combustion engine with a gearbox with hydrodynamic flow unit with lock-up clutch
DE3435338A1 (en) VEHICLE EXCHANGE GEARBOX
DE4311084C1 (en) Drive device of a vehicle
DE2203057A1 (en) TRANSMISSION SYSTEM FOR MOTOR VEHICLES
EP0306780B1 (en) Drive unit for commercial vehicles
DE2656474B2 (en) Hydraulic creeper drive arrangement for a commercial vehicle
DE69919958T2 (en) Tractor with lubrication system
DE3935228A1 (en) Vehicular drive with power-branching planetary gear train - allows order-of-magnitude difference of power ratings of engine and electric or hydraulic regulating motor
DE2935361A1 (en) Dynamic retarder for automatic transmission - has gearchange brakes operating on output drive
DE2820053A1 (en) DEVICE FOR TAKING AN ENERGY FROM A TRACTOR
DE3600007A1 (en) Drive system for a work vehicle, preferably for a street cleansing machine
DE8910016U1 (en) Transmission unit for motor vehicles

Legal Events

Date Code Title Description
8139 Disposal/non-payment of the annual fee