EP2796692A1 - Verfahren für den Betrieb eines Verbrennungsmotors - Google Patents

Verfahren für den Betrieb eines Verbrennungsmotors Download PDF

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Publication number
EP2796692A1
EP2796692A1 EP20130165078 EP13165078A EP2796692A1 EP 2796692 A1 EP2796692 A1 EP 2796692A1 EP 20130165078 EP20130165078 EP 20130165078 EP 13165078 A EP13165078 A EP 13165078A EP 2796692 A1 EP2796692 A1 EP 2796692A1
Authority
EP
European Patent Office
Prior art keywords
combustion engine
value
torque
clutch torque
operating cycle
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Withdrawn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
EP20130165078
Other languages
English (en)
French (fr)
Inventor
Vincenzo Rosito
Joachim Paul
Domenico Micucci
Giovanni Rizzo
Sebastian-Paul Wenzel
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
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to EP20130165078 priority Critical patent/EP2796692A1/de
Publication of EP2796692A1 publication Critical patent/EP2796692A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F02D41/009—Electrical control of supply of combustible mixture or its constituents using means for generating position or synchronisation signals
    • 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
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1497—With detection of the mechanical response of the engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/1002—Output torque
    • F02D2200/1004—Estimation of the output torque
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/1012—Engine speed gradient

Definitions

  • the present invention relates to a method of operating a combustion engine, wherein a clutch torque of said combustion engine is determined.
  • the present invention also relates to a control unit for operating a combustion engine, wherein said control unit is configured to determine a clutch torque of said combustion engine.
  • German patent publication DE 10 2006 056 708 A1 discloses a determination of a torque of a crankshaft of a combustion engine depending on the crankshaft speed.
  • the invention solves this object by a method according to claim 1. As well, the invention solves this object by a control unit according to claim 9.
  • the method according to the invention is characterized in that a value of said clutch torque for a specific, particularly k-th, operating cycle of said combustion engine is determined depending on a value of said clutch torque for a preceding, particularly (k-1)-th, operating cycle of said combustion engine, and on a delta torque value characterizing a change of said clutch torque between said preceding operating cycle and said specific operating cycle.
  • the inventive approach proposes to incrementally build the clutch torque taking into consideration a previous value / previous values of the clutch torque and a change / changes of the torque between different operating cycles of the combustion engine. This enables a particularly efficient determination of an instantaneous clutch torque, because a previous clutch torque value of a previous operating cycle is usually already known and the delta torque value can easily be determined according to embodiments of the invention.
  • said delta torque value is determined depending on at least one of the following parameters: a signal characterizing a rotational speed of a crankshaft, a polar moment of inertia of the combustion engine's components coupled to a crankshaft of the combustion engine.
  • a current value of the polar moment of inertia which may depend on a drive train condition such as e.g. a state of the clutch (engaged or disengaged) and/or a gear currently selected if the clutch state is engaged, and/or a geometry of wheels of a vehicle comprising the combustion engine and/or two-wheel-drive or four-wheel-drive, and the like.
  • said signal characterizing said rotational speed of the crankshaft is determined by a crankshaft sensor.
  • a friction torque corresponding with friction losses in the combustion engine is considered for determining said clutch torque.
  • crankshaft sensor is used that cooperates with a tooth wheel which is coupled to the crankshaft.
  • a respective delta torque value is determined and at least temporarily stored.
  • said clutch torque is used for at least one of the following procedures: A closed-loop control of said combustion engine, e.g. for setting a desired clutch torque, determining torque losses of the combustion engine, verifying an inner torque of the combustion engine.
  • Figure 1 schematically depicts a block diagram of an embodiment of a method according to the present invention. According to the present invention, it is proposed to determine a clutch torque of a combustion engine depending on a previous value of the clutch torque of a preceding operating cycle and depending on a delta torque value which characterizes a change of the clutch torque between said preceding operating cycle and a specific operating cycle.
  • a specific value of a clutch torque of a combustion engine at a k-th operating cycle is to be determined, according to the present invention, an already known value for the clutch torque of the preceding operating cycle, i.e. the (k-1)-th operating cycle, is taken into consideration. Further, to account for any changes in the clutch torque between the preceding operating cycle and the considered k-th operating cycle, a delta torque value ⁇ M is also considered. Based on these two parameters, the actual value of the clutch torque for the considered specific operating cycle k, namely the value M_ ⁇ _k is determined.
  • Fig. 1 depicts these function relationships by a function block that receives as input parameters the clutch torque M_ ⁇ _k-1 of a preceding operating cycle and said delta torque value ⁇ M. The function block determines based on these input parameters a clutch torque M_ ⁇ _k of a current operating cycle, wherein M_cl denotes a specific clutch torque value so obtained.
  • the function block of Fig. 1 may e.g. be implemented in form of software and/or hardware and/or firmware, e.g. of a control unit 20 ( Fig. 4 ) controlling an operation of the combustion engine 10.
  • FIG. 4 depicts a block diagram of the combustion engine 10 which comprises a crankshaft 12.
  • a crankshaft sensor 14 comprises a tooth wheel 14a that is coupled with the crankshaft 12 and that operates together with the crankshaft sensor 14 in a per se known manner to provide a crankshaft speed signal which characterizes the angular velocity of the crankshaft 12.
  • this angular velocity of the crankshaft 12 is determined, and on this basis, the clutch torque M_cl of the combustion engine 10 is determined for specific operating cycles of the combustion engine 10.
  • the method according to the embodiments may e.g. be implemented in form of a software program for a processor (not shown) which is comprised within the control unit 20 that controls operation of the combustion 10 in a per se known manner.
  • Fig. 2 schematically depicts a tooth wheel 14a of a crankshaft sensor 14 ( Fig. 4 ) that can be used with the present invention.
  • the tooth wheel 14a comprises a total number of 58 teeth T, wherein teeth number 0, 1, 40, 48 are denoted with corresponding numbers for illustrative purposes.
  • This type of wheel is also denoted as "60-2 wheel”.
  • An angular distance between two neighboring teeth e.g. comprises about six degrees.
  • the sensor 14 detects a nearly rectangular or at least substantially sinusoidal, periodic signal (caused by the teeth T and gaps between said teeth passing by), the fundamental frequency of which corresponds with an angular speed of the wheel 14a and enables determination of the wheel speed.
  • Fig. 3 schematically depicts crankshaft tooth time distances that may be used according to the invention, which may be obtained by using a tooth wheel 14a as depicted by Fig. 2 .
  • an angular movement of the wheel by a first angle ⁇ 1 corresponds to a "tooth time" of ⁇ t 1
  • a second angle ⁇ 2 corresponds to a "tooth time” of ⁇ t 2 , and so on.
  • M ( ⁇ k -1 ) represents a value of said clutch torque M_cl ( Fig. 1 ) for a preceding, i.e. (k-1)-th, operating cycle of said combustion engine 10, wherein M F represents a friction torque of said combustion engine 10, wherein J represents a polar moment of inertia corresponding to the parts (not shown) of the combustion engine 10 coupled with the crankshaft, wherein ⁇ represents an angular crankshaft speed, wherein N represents a number of tooth time values considered for determining said delta torque value between two subsequent operating cycles of the combustion engine, and wherein ⁇ t i represents the i-th tooth time value associated with the respective crankshaft speed.
  • Parts of the engine 10 coupled with the crankshaft 12 may e.g. be parts of the drive train when the clutch is engaged, as well as e.g. wheels driven by the drive train, and the like.
  • a specific value of the polar moment of inertia J is considered which reflects the actual situation of elements coupled to the crankshaft.
  • the value of J is expected to be higher than when the clutch is disengaged, and the like.
  • the different values for parameter J may be determined during a test series and e.g. stored in the control unit 20 in form of a look-up table or the like.
  • ⁇ i 1 N ⁇ ⁇ t i - 2 - ⁇ ⁇ t i - 1 N ⁇ ⁇ ⁇ t i - 2 ⁇ ⁇ ⁇ t i - 1 may e.g. be evaluated over one engine revolution (crankshaft revolution), wherein the ⁇ t i represents the tooth time values as illustrated by Fig.
  • the subsequent values M( ⁇ k+1 ), M( ⁇ k+2 ), .. may be efficiently determined.
  • the clutch torque M_cl so determined is used for at least one of the following procedures:
  • an existing sensor 14 may be used and especially no cylinder pressure sensors or the like are required.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
EP20130165078 2013-04-24 2013-04-24 Verfahren für den Betrieb eines Verbrennungsmotors Withdrawn EP2796692A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20130165078 EP2796692A1 (de) 2013-04-24 2013-04-24 Verfahren für den Betrieb eines Verbrennungsmotors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20130165078 EP2796692A1 (de) 2013-04-24 2013-04-24 Verfahren für den Betrieb eines Verbrennungsmotors

Publications (1)

Publication Number Publication Date
EP2796692A1 true EP2796692A1 (de) 2014-10-29

Family

ID=48193105

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20130165078 Withdrawn EP2796692A1 (de) 2013-04-24 2013-04-24 Verfahren für den Betrieb eines Verbrennungsmotors

Country Status (1)

Country Link
EP (1) EP2796692A1 (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19540675C1 (de) * 1995-10-31 1997-04-30 Siemens Ag Verfahren zur Momentenschätzung mittels Drehzahlauswertung an der Kurbelwelle einer Brennkraftmaschine
US6427109B1 (en) * 2001-10-11 2002-07-30 Ford Global Technologies, Inc. Powertrain torque estimate
EP1580463A2 (de) * 2004-03-24 2005-09-28 Toyota Jidosha Kabushiki Kaisha System und Verfahren zum Erfassen des von einer Kupplung übertragenen Drehmoments
DE102006056708A1 (de) 2006-11-30 2008-06-12 Robert Bosch Gmbh Verfahren zur Bestimmung zylinderindividueller Verbrennugsmerkmale einer Brennkraftmaschine
EP2039922A1 (de) * 2007-01-16 2009-03-25 Toyota Jidosha Kabushiki Kaisha Drehmomentschätzungsvorrichtung für einen verbrennungsmotor
US20120004821A1 (en) * 2009-03-06 2012-01-05 Toyota Jidosha Kabushiki Kaisha Torque estimating system for internal combustion engine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19540675C1 (de) * 1995-10-31 1997-04-30 Siemens Ag Verfahren zur Momentenschätzung mittels Drehzahlauswertung an der Kurbelwelle einer Brennkraftmaschine
US6427109B1 (en) * 2001-10-11 2002-07-30 Ford Global Technologies, Inc. Powertrain torque estimate
EP1580463A2 (de) * 2004-03-24 2005-09-28 Toyota Jidosha Kabushiki Kaisha System und Verfahren zum Erfassen des von einer Kupplung übertragenen Drehmoments
DE102006056708A1 (de) 2006-11-30 2008-06-12 Robert Bosch Gmbh Verfahren zur Bestimmung zylinderindividueller Verbrennugsmerkmale einer Brennkraftmaschine
EP2039922A1 (de) * 2007-01-16 2009-03-25 Toyota Jidosha Kabushiki Kaisha Drehmomentschätzungsvorrichtung für einen verbrennungsmotor
US20120004821A1 (en) * 2009-03-06 2012-01-05 Toyota Jidosha Kabushiki Kaisha Torque estimating system for internal combustion engine

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